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WO2006010732A1 - Procede et machine de fabrication de sacs a provisions en papier - Google Patents

Procede et machine de fabrication de sacs a provisions en papier Download PDF

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Publication number
WO2006010732A1
WO2006010732A1 PCT/EP2005/053531 EP2005053531W WO2006010732A1 WO 2006010732 A1 WO2006010732 A1 WO 2006010732A1 EP 2005053531 W EP2005053531 W EP 2005053531W WO 2006010732 A1 WO2006010732 A1 WO 2006010732A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
sheet
forming block
paper
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2005/053531
Other languages
English (en)
Inventor
Franco Barilli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BL Macchine Automatiche SpA
Original Assignee
BL Macchine Automatiche SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BL Macchine Automatiche SpA filed Critical BL Macchine Automatiche SpA
Publication of WO2006010732A1 publication Critical patent/WO2006010732A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/28—Folding sheets, blanks or webs around mandrels
    • B31B70/30—Moving mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0012—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing in the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms
    • B31B50/30—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms the mandrels moving
    • B31B50/32—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms the mandrels moving in circular paths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812—Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8122—Applying patches
    • B31B50/8124—Applying patches the patches being taken out of a magazine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/022—Holders for feeding or positioning sheets or webs
    • B31B70/024—Rotating holders, e.g. star wheels, drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/864—Mounting separate handles on bags, sheets or webs

Definitions

  • the invention relates to a method and the corresponding machine for the automatic fabrication of shopping bags, made from paper and/or any other suitable material, having the same quality characteristics as those currently made by hand.
  • the machine in question has an estimated output of approximately 12,000 bags in one eight-hour shift, for which the presence of two or three persons is required on average. Considering that, in the present manual production cycle, approximately 6500-7000 bags are produced in an eight-hour shift, requiring approximately twenty operatives, the technical progress provided in this field by the machine according to the invention can easily be appreciated.
  • the machine operates in a fully automatic way, picking up a sheet of paper from a stack or a reel, placing it on a horizontal plane and translating it in the direction of the largest dimension, while suitable means form lines or spots of adhesive a short distance apart and parallel to the side of the sheet on which, at the end of the translational movement, other means apply the reinforcing paper pieces for the future larger and upper sides of the bag, where the handle will be fitted (see below).
  • the rear corner area of the side on which the adhesive is applied is chamfered by a cutting operation, while holes are made in the front corner area of the same side, for reasons described below.
  • the side of the sheet to which the said reinforcing paper pieces have been applied is folded by suitable means, in such a way that the said paper pieces are placed inside the folded portion and are therefore invisible.
  • a gripper which acts on the folded side of the sheet, the sheet is translated horizontally in a direction which is at an angle of 90° to that of the preceding translation, and in this step the sheet is positioned under a parallelepipedal forming block of a carousel with a vertical axis, which carries another three identical forming blocks which are spaced apart from each other at equal angular intervals, this carousel being rotated on command, always in the same direction, through ninety degrees each time.
  • the sheet is provided with at least one line of adhesive of the side which is parallel to the direction of movement and which terminates at its leading edge in the chamfered corner area, which has the function of bringing the line of adhesive as close as possible to the front side of the sheet which is to be folded and internally reinforced by the paper pieces.
  • the sheet is positioned, as stated previously, under one of the said parallelepipedal forming blocks of the carousel, whose base facing the direction of feed of the sheet carries suction means which retain a rectangular piece of paper fed to it at the correct time by suitable means, this piece of paper having the function of reinforcing the bottom of the future bag.
  • folding and scoring means which, at the correct time, after the sheet has been released by the translation grippers, raise the sheet against the said forming block and wrap it in such a way as to form a tube, with the upper flaps overlapping and fixed to each other by the line of adhesive provided in the aforesaid second translation step.
  • the adhesive which is located on the chamfered and folded edge of the sheet is superimposed on the area with the holes in the opposite edge, in such a way that the adhesive passes through to the lower layer of the folded portions and firmly fixes the parts even in these portions consisting of a plurality of superimposed layers.
  • the folding of the upper edges and their overlapping on each other, on the upper wall of the stamp, are completed by a presser which forms a Y-shaped score on the upper side of the tube, while a corresponding Y-shaped score is formed on the lower side of the tube, by means of a lower component of the said folding means, also making use of a suitable arrangement of the lower and upper horizontal walls of the forming block for this purpose.
  • the aforesaid Y-shaped score has the function of preparing the future smaller and frontal walls of the bag for accordion-folding.
  • the said folding means return to the lower rest position, the upper forming block rises and the carousel rotates through ninety degrees, positioning a new forming block next to the said folding means, for repeating another cycle as described, while the forming block, wrapped by the tube and with the bottom paper piece, moves to a second station where means are provided to fold the short flaps vertically on to the paper piece, these short flaps being the upper ones below the horizontal articulation of the part of the tube which projects from the forming block, then to distribute first vertical lines of adhesive over the set of the said first flaps and the visible part of the bottom paper piece, then to fold on to these one of the larger bottom flaps of the tube, with a vertical articulation, then to distribute further lines of adhesive on this flap and on the bottom paper piece, and finally to fold on to these the other larger flap of the tube.
  • the carousel rotates through a further ninety degrees and the forming block with the bag is transferred to a third station, where a presser acts on the bottom flaps until the said lines of adhesive have set, while suitable guide means keep the said flaps in the closed position during the movement from the second to the third station.
  • the carousel rotates through a further ninety degrees and transfers the forming block with the bag, closed at its sides and at its bottom, to a fourth station where means positioned at the edge of the forming block decrease its cross section in such a way that the bag can be removed from the forming block by suitable means, while the inflated parts of the bag are flattened and its bottom is rotated through ninety degrees on the said flattened part, and in these conditions the bag is inserted between a pair of parallel conveyors with a vertical axis, which flatten the bag and hold it correctly on edge when cutting means located upstream of the conveyors come into action to form, in the temporarily stationary bag, through-holes for the future fitting of the handle, usually made from cord, and any necessary holes for the fitting of any necessary improvised closure.
  • the bag On leaving the said conveyors, the bag can be collected in stacks and sent to a manual cycle for fitting the handle, or, in a more complete version of the machine, the bag can be fed to one of the pick-up means of a second carousel with a vertical axis, which holds the bag by the bottom and by the side walls and which, by cyclic rotations, positions the bag in successive stations where the cord handles are fitted into the appropriate holes in the reinforced open sides of the open mouth of each bag, the said handles being knotted on their ends inside the bag and the bag with the handle being re-flattened and placed on a conveyor which removes it and causes it to interact with a parallel smoothing conveyor lying above it, which returns the bag to the original flat condition for stacking.
  • Fig. 1 is a schematic perspective view of the principal devices which make up the machine, in the version in which the paper sheets are fed from a stack, and without the handle fitting means;
  • Fig. 2 is a perspective view of the initial station of the machine, in the version in which the sheets of paper are drawn from a reel;
  • Fig. 3 is a schematic perspective view of the devices which can be added in series with the machine of Figure 1 , for automatically fitting the handles to the bags;
  • - Fig. 4 is a lateral elevation of the means for feeding paper sheets picked up from a stack to the subsequent first translation means;
  • Fig. 5 is a view from above of the means of Figure 4 and of the subsequent means for the second translation of the paper sheets;
  • Fig. 6 is a schematic view from above of the carousel with a vertical axis with the bag forming blocks, shown in relation to the said means for the second translation of the paper sheets, and with some of the corresponding operating stations;
  • Fig. 7 is a schematic lateral elevation of the means for feeding the paper pieces for reinforcing the upper edges of the lateral walls of the future bag and for feeding the paper piece for reinforcing the bottom of the bag to the forming blocks of the carousel of Figure 6;
  • Figs 8 and 8a are schematic side views, in partial section, of the means for folding the side of the sheet which is provided with the paper pieces for stiffening the upper edges of the lateral parts of the future bag, these means being shown in subsequent stages of their operating cycle;
  • Fig. 9 is a side view of the first operating station of the carousel of Figure 6, this station being responsible for making the paper into a tube on a forming block of the carousel;
  • Figs 10 and 10a are front views of the station of Figure 9, shown in successive stages of its operating cycle;
  • Figs 1 1 , 11 a and 1 1 b show in plan from above, and in successive operating stages, the final station for discharging the shaped bags from the carousel of Figure 6;
  • Figs 12, 13, 14, 15, 16, 17, 18, 19, 20 and 21 are perspective views of the bag and some components of the machine, during the same number of stages of the bag formation cycle;
  • Fig. 22 is a plan view of a variant embodiment of the initial part of the machine in the version in which the sheets are fed from a pair of adjacent stacks, for forming large-format bags;
  • - Fig. 23 shows details viewed through the cross section line XXIII-XXIII of Figure 22;
  • Figs 24, 25, 26 and 27 show in lateral elevation the means of the station of Figure 23 in successive stages of their operating cycle
  • Fig. 28 is an end-on sectional view of the tubular article for forming the bag, produced by the means shown in Figures 22 to 27.
  • the machine comprises a first station A for automatically feeding a rectangular sheet F of paper and/or other suitable material, having dimensions such that a bag can be formed from it, to a horizontal conveyor 1 formed by perforated parallel belts, the upper branch of which runs over fixed manifolds 2 connected to a suction source (see below).
  • a horizontal conveyor 1 formed by perforated parallel belts, the upper branch of which runs over fixed manifolds 2 connected to a suction source (see below).
  • the sheet On the conveyor 1 , the sheet has to be turned so that the printed surface faces downwards and the larger dimension is orientated in the longitudinal direction of the conveyor in question.
  • the conveyor 1 is driven by a motor with electronic speed and phase control, by the procedures described below.
  • the sheets F can, for example, be drawn from a reel 3 positioned laterally with respect to the conveyor 1 and parallel to it, as shown in Figure 2.
  • the strip of paper unwound from the reel 3 is taken in a zigzag path around a set of parallel rollers 4 which have the function of buffering and smoothing the strip, to remove the curvature acquired when it was wound on to the reel, and then to return it to the flat form, after which the strip is drawn by a pair of parallel motorized rollers 5 and is carried transversely by suitable means on to a supporting surface (see below) and on to the initial part of the conveyor 1 which is temporarily stationary, while at the correct time suitable means, indicated schematically by the arrow 6, make a transverse cut to separate the sheet F, located on the said conveyor 1 , from the strip.
  • suitable means (not shown) are provided to align the sheet F against a fixed reference 7 positioned in a parallel way on the side of the conveyor 1 opposite the side facing the reel 3.
  • the sheets F can be stacked with the printed surface upwards and a palletized stack 8 of these sheets is positioned laterally by the initial part of the aforesaid conveyor 1 and, as also shown in the details of Figures 4 and 5, the stack is positioned on an elevator 9 and has one of its walls bearing against at least one vertical fixed reference wall 10, the said elevator being fixed to a support structure 1 1 which is, for example, U-shaped in plan and whose sides carry sliding blocks 12 which slide on vertical guides 13 fixed to a support frame 14, microswitches 15 and 15' being provided to signal the low position and the position of maximum raising of the elevator respectively.
  • a support structure 1 1 which is, for example, U-shaped in plan and whose sides carry sliding blocks 12 which slide on vertical guides 13 fixed to a support frame 14, microswitches 15 and 15' being provided to signal the low position and the position of maximum raising of the elevator respectively.
  • the sides of the structure 1 1 are fixed to the ends of corresponding closed chains 16, the ends of whose vertical portions run round sprockets 17 and 18 located respectively in the lower and upper part of the said frame 14, the ends of the horizontal portions of these chains running round sprockets 19 keyed on a timing shaft 20 supported rotatably by a base structure 21 and driven by a power unit (not shown), with an electric motor having two directions of rotation and preferably of the type with electronic speed and phase control, which automatically causes the cyclic raising of the elevator 9, so that the top of the stack of sheets 8 is always correctly positioned next to level sensors 22 and next to a bar with suction cups 23, held by pairs of composite articulated parallelogram structures 24 pivoted at 25 on the frame 21 and made to oscillate by suitable cams 26 keyed on a shaft 27 which is rotated at the correct speed by a power unit (not shown).
  • This feeding station is distinguished from the known art in that the sheet picked up and translated by the bar with the suction cups 23 is positioned by the latter in the initial part of an adjacent conveyor with parallel perforated belts 29 which run on manifolds 30 in the form of a U rotated through ninety degrees, with a portion having a large radius of curvature opposite the stack 8 and divided into sectors which can be driven selectively by suitable means, the belts running outside these manifolds, on shafts 31 parallel to the longitudinal axis of the underlying conveyor 1 , one of these shafts being connected to the chain 32 which takes its motion from a sprocket keyed to the shaft 27 of the cams and which is driven by the power unit 33.
  • the vacuum pump connected to the said manifolds 30, and to other suction means described below, is not shown in the drawings and is driven by its own motor.
  • the paper sheet F fed by the suction cups 23 is collected by the conveyor belts 29 which complete its withdrawal from the top of the stack 8 and carry it in a tilting path above the initial part of the conveyor 1 and an adjacent support surface 1 12, in the form of a comb, in such a way that the printed surface of the sheet, which previously faced upwards, finally faces downwards.
  • suitable means neutralize the lower sectors of the manifolds 30 and the sheet F falls from the belts 29 and its front edge, with respect to the direction of movement, touches the vertical teeth of a comb 34 which holds it correctly on the surface 1 12 and on the initial part of the conveyor 1 which is temporarily stationary.
  • the teeth of the comb 34 engage in lateral apertures 35 of the surface 1 12, visible in Figure 5.
  • the teeth of the comb 34 extend from above and are associated with a sliding block, which moves on guides 36 positioned in a parallel way between the lower sectors of the manifolds 30, and which, by means of suitable levers, derives its motion, for example, from at least one cam keyed on the shaft 27.
  • the teeth 34 of the comb cause the sheet to be translated on the surface 1 12 and on the conveyor 1 , so as to bring the opposite edge of the sheet to bear on a fixed reference 7 located on the side of the surface 1 12 and of the conveyor 1 opposite the side facing the stack 8.
  • means are provided to activate the suction manifolds 2 associated with the belts of the conveyor 1 , to fix the sheet to the latter, and means cause the activation of this conveyor, initially at a slow speed, and, when the front edge of the sheet F is detected by optoelectronic means 37 (Fig. 5), suitable means cause the conveyor to advance at a suitable speed to transfer the sheet, centred in a predetermined way according to the format, to the subsequent station B.
  • the sheet F is temporarily halted, firstly at a station 38 which forms in the sheet a correct number of holes 39 parallel to and a short distance from the front edge with respect to the direction of movement of the sheet, and secondly at a station 40 which makes a diagonal chamfering cut 41 in the corner area of the rear side of the sheet F, opposite the portion of the sheet in which the said holes 39 are formed (see below).
  • suitable stationary means 42 dispense lines of adhesive 43, 43' which, when the sheet F halts at the station B, are suitably centred with respect to magazines 44, 44' which contain the paper pieces 45, 45' for reinforcing the future upper edge of the bag (see below), and these paper pieces are picked up by means 46 with suction cups from the said magazines and are applied to the portions of the sheet F with the said lines of adhesive, as shown in Figures 5 and 7, so as to be fixed firmly to the sheet.
  • Figure 7 shows how the means 46 oscillate on a pivot 47 and are driven, by means of levers, by cams 48 keyed on a secondary drive shaft 49 parallel to the return shafts of the conveyor 1.
  • the lines of adhesive 43, 43' and the reinforcing paper pieces 45, 45' can be applied to a more inward portion of the sheet, spaced apart from the edge of the sheet by a distance substantially equal to the width of the said paper pieces.
  • two parallel adjacent pairs of paper pieces 45, 45' can be fixed to the sheet F, and can then be overlapped on each other after the folding step, described below, which forms the future reinforced upper edge of the bag.
  • Figures 7 and 8 show how the side of the sheet to which the reinforcing paper pieces 45, 45' are applied rests on a folder 50 which initially opposes the said application means 46 and which is supported by rotation means (not shown) which, on command, make it rotate through 180° in the anticlockwise direction according to Figure 8, by rotation about its longitudinal edge 50'.
  • a blade 51 which was previously, for example, in a raised position, and which acts as an opposing piece in the step of folding the sheet, has its front edge positioned on the sheet F at the correct time, at the edge 50' of the folder 50 and parallel to the latter.
  • the portion of the sheet folded by the folder 50 which in the present example is provided with the reinforcing paper pieces 45, 45', is turned over on to this blade.
  • the blade 51 is connected to means (not shown) which, after the active movement of the folder 50, translate the blade away from the folder and from the conveyor 1 , as shown in Figure 8a, so as to insert the folded portion of the sheet, reinforced by the paper pieces, between a pair of grippers 52, 52' which have been brought up to the folder at the correct time and which are then closed to grip the folded portion of the sheet, while the said blade 51 is withdrawn to the rest position at the correct time.
  • Figure 8 shows how suitable pressers 150 are provided to hold the sheet temporarily on supports 250 positioned between the belts of the conveyor 1 , when the sheet reaches the station B, so as to prevent any undesired movement of the sheet during the active step of upward rotation of the folder 50.
  • the blade 51 is characterized by a comb shape, to allow the passage of the pressers 150.
  • the scope of the invention also includes the variant in which the means of Figure 8 and the folding step performed by them are not used, for the fabrication of bags with their upper edges reinforced by the inner paper pieces 45, 45' but not folded, or folded in a subsequent step, after the creation of the tubular article for forming the bags (see below).
  • the grippers 52, 52' have the function of transferring the paper sheet F from the aforesaid station B, in which the reinforcing paper pieces 45, 45' are applied, to a subsequent station C which is considered below, and in this step stationary means 53 dispense at least one line of adhesive 54 on to the side of the paper which is provided with the chamfered corner 41 and which is parallel to the direction of movement, this line of adhesive extending over the whole length of the sheet because of the said chamfer, even under the portion which has been edged and reinforced with the said paper pieces.
  • the grippers 52, 52' correctly position the sheet F, with the printed surface facing downwards, under one of the parallelepipedal forming blocks 55 of the station C, which form a positive model of a bag, as also shown schematically in Figure 12 which illustrates the bag forming process.
  • the number of forming blocks 55 is four, for example, and they are positioned at equal angular intervals on, and project from, a carousel with a vertical axis 56, which is rotated by suitable means (not shown) in steps of ninety degrees, for example in the clockwise direction with respect to Figure 6.
  • Figures 6 and 9 show that the parallelepipedal forming blocks 55 are positioned on edge, with the smaller lateral walls at the top and bottom and in horizontal positions.
  • the larger vertical lateral walls, and the smaller upper lateral wall and the front vertical wall, are fixed, while the smaller lower lateral wall of each forming block is fixed on sliding blocks 57 which slide on diagonal slides 58 and which are connected to a linear actuator 59 which, on command, can raise or lower the sliding block 57 together with the lower wall in the directions indicated by the arrows 60 in Figure 9.
  • the lower movable lateral wall of the forming block When the lower movable lateral wall of the forming block is in the low position, it completes a lower portion of the other three adjacent walls of the forming block, and therefore, when this movable wall is raised, the height of the forming block is suitably decreased. This characteristic is used to facilitate the removal of the bag from the forming block at the end of the forming cycle (see below). In the active operating step of the forming block 55, its lower lateral wall is in the low position.
  • each forming block 55 is provided with suction cups 61 (see also Figure 13) which are activated to retain the paper piece 62 for reinforcing the bottom of the future bag.
  • This paper piece is drawn from a magazine 63 positioned between the magazines 44 and 44' (Figs 5 and 7), by a parallelepipedal suction manipulator 64, which, after having transferred the paper piece to the forming block 55, remains temporarily in association with the forming block to complete in a coplanar way the horizontal extension of the four lateral walls of the block.
  • the manipulator 64 therefore has the same vertical section as the forming blocks 55 of station C.
  • Figures 7 and 9 show how the manipulator 64 is hinged at 65 on an arm 66 which, in order to interact alternately with the magazine 63 and with the forming block 55, is oscillated on a pivot 67 by first and second levers 68 and 68', and by at least one cam 69 keyed on the secondary drive shaft 49.
  • a sprocket 70 which is connected by a chain 71 to a sprocket 72 rotatable on the pivot 67 and connected to first and second levers 73 and 73' which follow the profile of a cam 74 keyed on the said drive shaft 49.
  • the manipulator 64 while oscillating on the arm 66, is rotated around the shaft 70 so that its face on which the suction and pick-up means open is positioned initially parallel to the bottom of the magazine 63, in order to pick up a paper piece from it, and then parallel to the vertical wall of the forming block 55, to position and transfer the said paper piece on to the pick-up means 61 provided on this wall of the forming block.
  • the sheet In the location C1 of the station C, the sheet is correctly positioned by the electronic means which control the motor for advancing the grippers 52, 52', and, at the end of the active travel of these grippers, the sheet is secured by lower suction cups 75, so that it is positioned with a precise reference with respect to the forming block 55 located above it.
  • the central part 76 is in the low position shown in solid lines in Figure 9 and in broken lines in Figure 10, and the flaps 78, 78' are in a horizontal position coplanar with the part 76, which is mounted on a sliding block 82 which can slide on a vertical guide 83 and which can be raised and lowered on command by means of levers 84 and a cam keyed on a secondary shaft 49'. Further cams, which activate first and second levers 85, 85' hinged at 86, 86' to corresponding arms 87, 87' fixed to the said flaps 78, 78', are mounted on the secondary shaft 49' and on the parallel shaft 49, these shafts being synchronized with each other.
  • the cylinders 81 , 81 ' are operated to fold the final portions of the sheet through a small distance on to the upper wall of the forming block, so that the larger of these portions, which has the line of adhesive 54 (Figs 5 and 6), is placed on top of the other portion, after which a presser 88, operated by a stationary vertical actuator 88', is activated at the correct time to press the said final portions of the sheet on to the upper wall of the forming block, thus fixing these portions of the sheet firmly together and completing the formation of the paper tube around the forming block 55 and around the manipulator 64 temporarily associated with the forming block.
  • FIGS. 15 and 16 show how, because of the presence of the said holes 39 and the corner chamfer 41 , the line of adhesive 54 acts at a certain depth, thus also firmly fixing together the folded reinforced portions of the tubular paper article formed on the forming block 55.
  • the paper tube wrapped around the forming block 55 and the manipulator 64 is provided with sufficiently deep scored lines on the horizontal corner edges of the assembly 55, 64, so that when the paper article is subsequently removed from the forming block (see below) the article remains in its rectangular parallelepipedal shape.
  • the corresponding lower and upper horizontal walls of the tubular paper article wrapped around the forming block are provided with sufficiently deep scored lines 89, in the form of a letter Y, as shown in Figure 6, running along the midlines of the said walls and joining in the corner areas of the bottom of the future bag, to impart the necessary capacity of accordion folding to the lateral walls of the bag (see below).
  • Folders 90 operated by rectilinear vertical or oscillating actuators, not shown in detail in the drawings since they can easily be produced in various forms by persons skilled in the art, fold the horizontally hinged upper and lower flaps L1 , L2 of the portion of tube projecting from the forming block 55 on to the bottom paper piece 62, and at the end of the cycle these folders leave an ample portion of the folded flaps free.
  • a group of three guns 91 is made to travel vertically downwards, only two of these guns, namely the central gun and one outer gun, being active, so as to dispense corresponding lines of adhesive 92 on the midline, and at a small distance from the midline, of the bottom paper piece 62 and of the free portions of the said folded flaps L1 , L2.
  • a folder 93 (Fig. 6) folds the vertical flap L3 which is fixed on the said lines of adhesive 92 and which at the end of the step is left sufficiently free by the said folder, so that after the upward return of the said guns 91 (Fig. 20) the guns are activated to dispense two lines of adhesive 94 on to the previously folded flap L3 and to the side of it, so that the adhesive is applied to the bottom paper piece 62 and the flaps L1 , L2.
  • a folder 95 comes into action to fold the vertically hinged final flap L4 on to the flap L3, as also shown in Figure 21.
  • the folders 90 have been retracted at the correct time into the rest position and, while the folders 93 and 95 remain temporarily in the active position, the carousel 56 rotates through 90° to transfer the forming block with the bag closed at its bottom from the location C2 to the subsequent location C3, while a fixed curved guide 96 keeps the bottom flaps L1 - L4 in the closed position, and when the forming block reaches the location C3 a presser 97 comes into operation to exert a uniformly distributed pressure on the bottom of the bag and of the forming block 55, for the time required to ensure the fixing of the said flaps and the bottom paper piece by the aforesaid lines of adhesive
  • the bag lying on the forming block 55 which has reached the location C4 and has been collapsed at this point as stated above, is removed from the forming block, as shown in broken lines and in solid lines in Figure 11 , and is translated to the subsequent operating station D. It is in this step that the edge of the bag with the reinforcing paper pieces 45, 45', if not previously folded at the station B, as described above, is folded on to itself by suitable folders (not shown) while the bag is retained by lateral manipulators 98 and any other necessary manipulators.
  • the carriage which carries the manipulators 98 and 99 also has vertical folding blades 100 located along the midlines of the lower and upper lateral walls of the bag, these blades being brought towards each other and towards the bag at the correct time, while the lateral manipulators are brought towards each other at the correct time, as shown in Figure 1 1 a, so as to flatten and close the bag, making use of the lateral accordion fold scores 89 with which the bag has been provided.
  • the bottom manipulator 99 is brought suitably closer to the lateral manipulators, as shown in broken lines and in solid lines in Figure 1 1 a.
  • the bottom manipulator 99 rotates through ninety degrees about a vertical axis, so as to align the bottom with the rest of the bag.
  • the bottom manipulator 99 is preferably comb-shaped, to leave portions of the bottom of the bag free.
  • the carriage with the manipulators and folders described above in the final part of its travel away from the forming block 55, places the free portions of the bottom of the bag on the initial part of a motorized belt conveyor 101 , running round vertical shafts, this conveyor being initially opposite a vertical idle roller 102 carried by horizontal movement means 103 which bring it from the preceding rest position towards the conveyor 101 so as to press on to the conveyor the said free portions of the bottom of the bag which is released at the correct time by the lateral manipulators 98 and by the bottom manipulator 99, and is picked up by the means 101 and 102, the conveyor 101 being activated at the correct time to insert the flattened bag between itself and an adjacent conveyor 104 which is parallel and is also motorized, to flatten and support the bag, these conveyors being synchronized with each other and being driven by a motor with electronic speed and phase control.
  • the bag On leaving the conveyors 101 , 104, the bag can be collected and stacked by suitable means and can be sent to the manual cycle for fitting the handles, or, as shown in the variant of Figure 3, the bag can be placed in a subsequent operating station E where it is picked up by the flattened bottom, by gripping means 107 of the mechanical type for example, associated with a vertical carousel 108, there being, for example, four groups of gripping means spaced at equal angular intervals, this carousel also being controlled by means which, on command, rotate it in steps of ninety degrees.
  • the said gripping means 107 are combined with longer gripping means 109, which have suction cups at their ends to hold the lateral walls of the bag at a short distance from the areas provided with the said holes 106 for fitting the handles.
  • the carousel 108 rotates through 90° and transfers the bag to the location E2 where it arrives with its mouth opened by the gripping means 109 which have been duly activated for this purpose.
  • Means for fitting the handles M in the holes 106 operate at the location E2.
  • the bag with its handles reaches the location E3, where means operate to fix the handles M to the bag, for example by knotting their ends inside the bag.
  • means for both fitting and fixing one handle operate at the location E2
  • means for fitting and fixing the other handle operate at the next location E3.
  • the bag with its handles reaches the location E4, where gripping means 109 are brought together to return the bag to the flattened form, after which these gripping means are pneumatically inactivated and the corresponding mechanical gripping means 107 are opened, so that the bag can be deposited by gravity on the initial part of a conveyor belt 110 where suitable guide means (not shown) are provided to ensure that the bag is positioned transversely there, with the handles M at one side of this conveyor.
  • the conveyor 1 10 is motorized to move the bags away from the carousel 108, and can operate in synchronization with a small upper conveyor 1 1 1 which returns the bags with their handles to the flattened condition in which they left the conveyors 101 , 104 of station D of Figure 1.
  • the bags can be collected by stacking and packaging means of any suitable type (not shown).
  • FIG 22 shows how two adjacent stacks of sheets 8, 8' are positioned at station A, these sheets being fed simultaneously or in succession, by the means of feeding 23 and tilting 29 described with reference to Figures 1 , 4 and 5, to the conveyor 1 , which transfers them to a station G located upstream of station B in which the reinforcing paper pieces are applied, where the conveyor halts temporarily and is inactivated pneumatically with respect to the front sheet F which is held, by underlying suction cup means 1 13 for example, while the conveyor remains pneumatically active with respect to the following sheet F'.
  • At least one parallel line of adhesive 1 14 is applied to the rear transverse side of the rear sheet F, by a gun 1 15 which slides on guide and sliding block means 116 driven by power means 1 17 and which is positioned laterally with respect to the sheet at the start and end of its active travel, as shown in Figure 23.
  • deflectors 1 18 are raised by suitable means, so that, as shown in Figure 25, when the conveyor 1 advances the downstream sheet F', the sheet F is positioned with its front edge above the line of adhesive 1 14, and in this condition the sheet F' is correctly halted by the electronic means which control the motor for advancing the conveyor 1 , this conveyor remaining pneumatically active with respect to the said sheet F'.
  • the presser 1 19 is raised as shown in Figure 27, the suction cups 113 and any others are inactivated, and the conveyor 1 again becomes pneumatically active with respect to the whole article formed by the sheets F and F', and is then activated to transfer this article to station B of Figure 22, as already described for the basic machine.
  • Figure 28 shows how the tubular body for forming a large-format bag, when wrapped around the forming block 55, consists of the sheets F and F' joined together below by the line of adhesive 1 14 which has previously joined the sheets F and F', and joined above by the line of adhesive 54, as already described with reference to the basic machine.
  • the areas of joining of the two sheets are placed near the corners of the forming block 55 at 180° to each other, at the sides of the bag which can be contracted with an accordion fold and therefore in positions where they have little external impact. It is to be understood that the variant which has been described is also considered to be protected in the version in which the sheets to be joined together are drawn from adjacent reels.

Landscapes

  • Making Paper Articles (AREA)

Abstract

La feuille destinée à former le sac est prélevée d'un rouleau ou d'une pile, placée avec les inscriptions orientées vers le bas, et soumise à un premier mouvement de translation au cours duquel elle reçoit des lignes d'adhésif sur lesquelles des pièces de papier sont appliquées pour renforcer les bords supérieurs des futures parois latérales plus grandes du sac, lesdites pièces étant appliquées sur la feuille à la fin dudit mouvement de translation. Le bord de la feuille muni des pièces de papier de renfort est plié en forme de livre, si nécessaire, et la feuille est tirée par ce bord et déplacée vers le poste de mise en forme du sac, tandis que la ligne d'adhésif est appliquée sur un des côtés parallèle au sens du mouvement, pour réaliser la future fermeture ultérieure de la feuille en forme de tube grâce à des pliages appropriés et à une presse supérieure, sur un bloc de mise en forme tansporté avec d'autres blocs par un carrousel présentant un axe vertical, après rapprochement de la pièce de papier de renfort du fond du futur sac à la paroi verticale de ce bloc de mise en forme. Par des mouvements cycliques, le carrousel transfère l'article tubulaire vers des postes susccessifs pour fermer le rabats de fond, par application de lignes d'adhésif, vers un poste de pressage desdits rabats pliés et collés, et enfin vers un poste de retrait où un moyen entre en action pour retirer le sac, l'aplatir simultanément, et pratiquer dans son bord renforcé au moins deux trous destinés à recevoir et fixer ultérieurement les poignées. Le sac peut être recueilli et envoyé vers un cycle manuel de fixation des poignées, ou introduit dans un moyen de préhension d'un second carrousel à axe vertical, qui retient les sacs par leur fond et, à l'extérieur, par leurs parois latérales, et place les sacs en procession au niveau de postes respectifs dans lesquels les poignées, en cordon par exemple, sont fixés dans les trous appropriés ménagés dans la bouche ouverte de chaque sac, et nouées, par exemple, à leurs extrémités situées à l'intérieur du sac, le sac et sa poignée étant aplatis de nouveau et libéré.
PCT/EP2005/053531 2004-07-27 2005-07-20 Procede et machine de fabrication de sacs a provisions en papier Ceased WO2006010732A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000473A ITBO20040473A1 (it) 2004-07-27 2004-07-27 Procedimento e macchina per la fabbricazione di sportine di cartoncino per lo shopping aventi le stesse caratteristiche di quelle attulamente fabbricate a mano
ITBO2004A000473 2004-07-27

Publications (1)

Publication Number Publication Date
WO2006010732A1 true WO2006010732A1 (fr) 2006-02-02

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010146375A3 (fr) * 2009-06-18 2011-05-05 Elopak Systems Ag Appareil et procédé
WO2011064802A1 (fr) 2009-11-30 2011-06-03 Ruggero Peroni Procédé de fabrication de sacs à provisions et chaîne de fabrication automatisée associée
CN102862322A (zh) * 2012-09-26 2013-01-09 温州市瓯海南堡纸盒机械有限公司 一种手提袋加工机
CN104441778A (zh) * 2014-12-09 2015-03-25 东莞市铭丰包装品制造有限公司 包装盒面顶贴装机
WO2016182492A1 (fr) * 2015-05-08 2016-11-17 Ifoodbag Ab Système d'emballage de transport de produits d'épicerie
WO2017156641A1 (fr) 2016-03-18 2017-09-21 Tci Manufacturing Inc. Système et procédé de fabrication d'un contenant de vrac intermédiaire souple
CN110053297A (zh) * 2019-04-26 2019-07-26 东莞市万速自动化设备有限公司 纸盒贴衬机的贴衬装置
CN110605869A (zh) * 2019-09-25 2019-12-24 东莞市万速自动化设备有限公司 包装盒贴衬机
CN111941935A (zh) * 2020-08-19 2020-11-17 余文姣 一种纸塑复合袋自动密封袋口机
CN112356498A (zh) * 2020-11-03 2021-02-12 中科天工（武汉）智能技术有限公司 立式转盘成型机构、装置及开口盒的外面纸成型工艺
CN112406194A (zh) * 2020-11-25 2021-02-26 昆山金红凯包装制品有限公司 一种纸袋提把模块的矫形与检测器具
US11151508B2 (en) 2014-05-08 2021-10-19 Ifoodbag Ab Grocery transport packaging system
US11453517B2 (en) 2014-05-08 2022-09-27 Ifoodbag Ab Grocery transport packaging system
CN115610025A (zh) * 2022-12-06 2023-01-17 福建泉台智能科技开发有限公司 一种环保纸袋自动装配线
CN116902300A (zh) * 2023-09-14 2023-10-20 河南佰嘉新型节能材料有限公司 纸袋输送机
WO2025144110A1 (fr) * 2023-12-26 2025-07-03 Somtaş Maki̇ne Ambalaj Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Innovation dans une machine d'emballage

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CN118636526B (zh) * 2024-08-12 2025-01-24 洛阳昊隆药业有限公司 一种大输液直立软袋生产线

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DE2131491A1 (de) * 1970-06-24 1972-01-05 Idex Internat Ltd Verfahren zum Herstellen von Klotzboden-Beuteln und Einrichtung zur Durchfuehrung des Verfahrens
EP1203725A1 (fr) * 2000-10-17 2002-05-08 Vincenzo Borghi Sac avec un fond quadrangulaire, procédé pour la fabrication d'un tel sac, et dispositif pour la mise en oeuvre du procédé

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DE38785C (de) * 1900-01-01 F. E. BlLON in Paris, Rue des Halles 15 Papiersackmaschine
DE2131491A1 (de) * 1970-06-24 1972-01-05 Idex Internat Ltd Verfahren zum Herstellen von Klotzboden-Beuteln und Einrichtung zur Durchfuehrung des Verfahrens
EP1203725A1 (fr) * 2000-10-17 2002-05-08 Vincenzo Borghi Sac avec un fond quadrangulaire, procédé pour la fabrication d'un tel sac, et dispositif pour la mise en oeuvre du procédé

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010146375A3 (fr) * 2009-06-18 2011-05-05 Elopak Systems Ag Appareil et procédé
WO2011064802A1 (fr) 2009-11-30 2011-06-03 Ruggero Peroni Procédé de fabrication de sacs à provisions et chaîne de fabrication automatisée associée
CN102862322A (zh) * 2012-09-26 2013-01-09 温州市瓯海南堡纸盒机械有限公司 一种手提袋加工机
CN102862322B (zh) * 2012-09-26 2014-09-17 温州市瓯海南堡纸盒机械有限公司 一种手提袋加工机
US11151508B2 (en) 2014-05-08 2021-10-19 Ifoodbag Ab Grocery transport packaging system
US11453517B2 (en) 2014-05-08 2022-09-27 Ifoodbag Ab Grocery transport packaging system
CN104441778A (zh) * 2014-12-09 2015-03-25 东莞市铭丰包装品制造有限公司 包装盒面顶贴装机
WO2016182492A1 (fr) * 2015-05-08 2016-11-17 Ifoodbag Ab Système d'emballage de transport de produits d'épicerie
WO2017156641A1 (fr) 2016-03-18 2017-09-21 Tci Manufacturing Inc. Système et procédé de fabrication d'un contenant de vrac intermédiaire souple
US10953621B2 (en) 2016-03-18 2021-03-23 Tci Manufacturing Inc. System and method for manufacturing a flexible intermediate bulk container
US12005669B2 (en) 2016-03-18 2024-06-11 Tci Manufacturing Inc. System and method for manufacturing a flexible intermediate bulk container
CN109153211A (zh) * 2016-03-18 2019-01-04 Tci制造公司 用于制造柔性中间散装容器的系统和方法
CN109153211B (zh) * 2016-03-18 2021-01-08 Tci制造公司 用于制造柔性中间散装容器的系统和方法
EP3429839A4 (fr) * 2016-03-18 2019-10-16 TCI Manufacturing Inc. Système et procédé de fabrication d'un contenant de vrac intermédiaire souple
CN110053297A (zh) * 2019-04-26 2019-07-26 东莞市万速自动化设备有限公司 纸盒贴衬机的贴衬装置
CN110605869A (zh) * 2019-09-25 2019-12-24 东莞市万速自动化设备有限公司 包装盒贴衬机
CN111941935B (zh) * 2020-08-19 2021-11-12 衡阳市君玲传统食品科技发展有限责任公司 一种纸塑复合袋自动密封袋口机
CN111941935A (zh) * 2020-08-19 2020-11-17 余文姣 一种纸塑复合袋自动密封袋口机
CN112356498A (zh) * 2020-11-03 2021-02-12 中科天工（武汉）智能技术有限公司 立式转盘成型机构、装置及开口盒的外面纸成型工艺
CN112406194A (zh) * 2020-11-25 2021-02-26 昆山金红凯包装制品有限公司 一种纸袋提把模块的矫形与检测器具
CN115610025A (zh) * 2022-12-06 2023-01-17 福建泉台智能科技开发有限公司 一种环保纸袋自动装配线
CN116902300A (zh) * 2023-09-14 2023-10-20 河南佰嘉新型节能材料有限公司 纸袋输送机
CN116902300B (zh) * 2023-09-14 2023-12-05 河南佰嘉新型节能材料有限公司 纸袋输送机
WO2025144110A1 (fr) * 2023-12-26 2025-07-03 Somtaş Maki̇ne Ambalaj Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Innovation dans une machine d'emballage

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