US2898819A - Folding and gluing machine - Google Patents

Description

g- 11, 1959 I A. F. SHIELDS 2,898,819

FOLDING AND GLUING MACHINE Filed May 18, 1955 '5 Sheets-Sheet 1 Q 2 i a:

JNVENTORL Mamm /ma:

Mix/ 5 Sheets-Sheet 2 Aug. 11, 1959 A. F. SHIELDS FOLDING AND GLUING MACHINE Filed May 18, 1955 Aug. 11, 1959 A. F. SHIELDS FOLDING AND GLUING MACHINE 5 Sheets-Sheet 3 Filed May 18, 1955 'mH UH 1959 A. F. SHIELDS FOLDING AND GLUING MACHINE 5 Sheets-Sheet 4 Filed May 18, 1955 IN V EN TOR. A1. 85.4%? E J'xmezps Aug. 11, 1959 SHELDS 2,898,819

FOLDING AND GLUING MACHINE Filed May 18, 1955 I 5 Sheets-Sheet 5 FOLDING AND GLUING MACHINE Albert F. Shields, Forest Hills, N.Y., assignor to S & S Corrugated Paper Machinery (10., Inc., Brooklyn, N.Y., a corporation of New York Application May 18, 1955, Serial No. 509,329

11 Claims. (Cl. 93-49) My present invention is a continuation-in-part of my copending application Serial No. 474,196, filed December 9, 1954, and relates to a folding machine of the type generally wherein large size corrugated board or other paper blanks are to be passed from a stack, glued and then fed through various folding elements and thereby pre pared for further manufacturing operations.

More particularly my invention relates to a novel folding machine which is especially adapted to glue foldable side panels of corrugated blanks and then fold such blanks so as to prepare them for any further cartonmaking operations.

In the making of cartons it is necessary to first crease and slot the blanks in order to properly prepare them for the folding operation. The folding operation for ordinary square tubular boxes comprises bending of the two outer panels on the score lines so that the edges of the panels meet to form a collapsed tube. The tube is then ready for a taping operation.

In the event that it is desired to join the edges of the outer panels by an adhesive first it is necessary to apply the glue or other adhesive to the foldable outer panels of the blank and then fold the panels so that the outer edges overlap to an extent suificient to accommodate their being pressed and glued together.

Heretofore, it has not been possible in an automatic operation to glue and fold the box panels in a continuous automatic operation. My novel folding machine is so constructed as to overcome these diflic-ulties of the prior art, and to provide an automatic operation so that the blanks are glued and then folded, ready to be formed into cartons, boxes and the like.

Primarily, my invention is directed towards improvements to provide a rapid fully automatic and more efficient coordinated folding and gluing operation. These improvements include means to apply adhesive to an inner foldable panel of the blank and a folding mechanism in which the two outer panels of the box blank are folded so that they overlap. The folding and gluing operation is completed by a rockable pressure means which at the same time maintains the folded box blank in the said overlapped position.

My invention also includes means for stripping the folded blank from the mechanism which conveys the said blank through the machine; means for holding down the blank so that it will not unfold when so stripped; means for sirnplyfying and integrating the drives for the various elements of the machine so that each operation will take place at the proper instant.

The foregoing and many other objects of my invention will become apparent in the following description of the drawings in which:

Figure 1 is a top plan View of my novel improved folding machine.

Figure 2 is a side view of the novel folding machine of Figure 1.

Figure 3 is a schematic perspective of the mechanism for driving the various elements of my folding machine Patented Aug. 11, 1959 the glue applying mechanism.

Figure 6 is a side view taken partly in cross section of the novel means for stripping the folded blank and for coordinating its movement with the operation of the stitcher.

Figure 7 is an end view taken along the lines 7-7 of Figure 6 and looking in the direction of the arrows and further showing the operation of the stripping and holding down means of Figure 6.

Referring now to the Figures 1, 2 and 3 a stack of blanks 20 is placed on the bed of the stacking section 21 of the machine between the rear gauge 23 and the front gauges 25. The bottom blank in the stack is fed towards the right by the feed slats 27 through the space 30 below the front gauge 25.

The space 30 is so adjusted that it is just high enough to permit one of the blanks to pass through while holding back the remainder of the stack. The blank passes through the space 30 over the bar 31 and is pushed by the feed slat 27 between the upper and lower feed rollers 35 and 36, respectively. Feed rollers 35 and 36 engage the blank and carry it forward.

The blanks are then fed between the upper and lower feed rollers 41 and 42. Upper feed rollers 41 actually consist of two idler pressure rollers 41a and 41b. The feedrollers 42 on the underside are sectional type rollers extending entirely across the machine and are driven by a chain drive in :a manner hereinafter described in more detail.

The shaft 45 which drives feed rolls 42 also carry outside the two feed rolls a gluing mechanism comprising a glue roll 501 and a pressure roll 502. The glue roll is supported by a suitable mounting 510 and the pressure roll by means of lever 511. The operation of this mechanism is described hereinafter in more detail in connection withthe discussion of Figures 4 and 5.

It should be noted, however, that one of the side foldable panels of theblank passes between the pressure roll and the glue roll, so that adhesive is applied to the underside thereof along the entire longitudinal dimension at a point near or contiguous to the outer extremity of the foldable panel. Thus the overlapped panel which is the second panel to be folded contains, on the underside thereof, a tacky adhesive before entering the folding operation. If desired the mechanism can also be arranged to apply the adhesive to the topside of the first panel to be folded.

The blank pushed by roller 42 continues its forward motion until it hits stops 46 mounted on stop bars 47. While the blank is in the position with its forward edge against the two stops 46 the creases or scores on which the fold is to take place are in register with the outer sides with the folding bars 39 and 40. This is, of course, obtained by an appropriate adjustment of the machine, as hereinafter described, prior to the beginning of a run and by appropriate stacking of the blanks.

While the blank is in the stop position against stops 46 the folding bars 39 and 40 fold the blanks so that the panels overlap slightly. This means that one folding plate will act slightly out of phase with the other.

Theoperation of these plates is described in my parent Note that the stop bars are mounted on links which are provided with cam followers 51. The timing of this mechanism, of course, can be controlled by the appropriate design of the earns 50.

At this point the blanks are conveyed forward by slats 90 which are attached to the three chain conveying mechanism 130. The slats then carry the blank forward until the operation of the stripper shown in Figure 6 removed the blank from the slats.

Referring now to Figure 3 in more detail it can be seen how the machine is driven and how the action of the driving mechanisms for the various components are coordinated. The machine is driven by motor 100. Belt 103 coming off the fly wheel 102 of the motor engages pulley 104 which carries, on a common shaft 105, sprocket wheel 106. Sprocket 106 is connected by chain 107 so as to drive the jack shaft 108. Three sprockets are mounted on the said jack shaft. Sprocket 109 receives chain 107 and drives the shaft. Sprocket 110 drives chain 112 which in turn drives the lower second feed roll 42 and glue roll 501 through sprocket 114, the lower first feed roll 36 through the sprocket 115, and the upper first feed roll 35 through sprocket 116.

Note that the chain is wound around sprockets 115 and 116 so as to make upper feed rolls 35 and 36 rotate in an opposite direction. That is, in order to force the blank to the right the upper feed roll 35 must rotate counterclockwise while the lower feed roll 36 rotates clockwise. Adjusting idler 118 is also provided to make sure that the chain is properly taut. Sprocket 118 is adjustable in a horizontal direction as indicated by arrows 119. The third sprocket from the jack shaft 120 carries chain 122. This chain passes over stationary idler 123 and drives the folding box shaft 48 by means of sprocket 124. It then passes over an adjusting idler 125, stationary idler 126 and sprocket 147 which serves to operate the stripping device in a manner hereinafter described.

The sprocket 145 riding on shaft 111 is provided with holes 145a so as to either engage or disengage the pin 147a in clutch 147. A second sprocket 131 on common shaft 111 is provided with similar holes 131a so that it may also engage or disengagee the clutch 147. The clutch 147 is keyed to the shaft 111 and drives sprocket wheel 131 or 145 only when it is engaged with them through holes 131a and 145a. Otherwise, when not so engaged, these sprocket wheels ride freely on the shaft 111. The position of the clutch may be changed by the operator by means of an external handle 132. Chain 129 which connects sprocket 128 and 120 passes over the adjusting idler 133 while chain 129 passes over idler 133 and connects sprockets 127 and 145. The purpose of the clutch is to change the drive speed of shaft 50 operating the stripping device depending on the length of board being glued.

Thus the shaft 50' can be driven either from sprocket wheel 127 or from sprocket wheel 128 each of which will be provided with sprockets so as to provide for a two speed arrangement. In other words, sprocket 128 may drive shaft 50' through sprocket wheel 131 at a different rate than if the shaft were driven through sprockets 127 and 145. This provides a simple mechanism for changing the speed of the feed slat chain 130 and thereby enabling the machine to feed shorter blanks into the stitcher at a more rapid rate when desired. Thus, a speed changing mechanism is provided which Wlil double the output of folded boxes for a unit of movement of the chain 130. This clutch arrangement allows the operator to adust handle 132 to the appropriate position, depending on the number of feed slats 90 to be used on the chain drive 130.

Referring again to chain 122, it can be seen that the cha1n passes over stationary idler 134, vertically adjustable idler 135, stationary idler 136 and then'rotates by means of sprocket wheel 137 to operate the kicker slat 27 by means of shaft 26. The method of operating the kicker slat 27 is well known in the art and is shown in my prior Patents Nos. 2,583,712 (Figure 4), and 2,622,- 493 (Figure 4).

The chain 122 passes over stationary idler 138 and then back to jack shaft thus, it can be seen that the operation of kicker slat 27, the folding mechanism,

the stripping device and the drive for the slat carrying. chains are all operated by a single driving chain andthereby readily coordinated.

Moreover, a single driving chain also drives both sets of feed rollers and this driving chain also is driven from the common jack shaft 108 which further coordinates the operation of this chain 112, with aforementioned drive chain 122. Also coordinated with drive chain 122 is the drive for the hold down bar 56, that is, chain 139. This chain operates from separate sprocket 142 which is readily secured to shaft 48 which is driven by the chain drive 122. Chain 139 passes over idler 143 and then into the hold down mechanism which is described in more detail in connection with Figures 4 and 5 of my copending application Serial No. 474,196. The triple chain 130 carrying slats 90 is also coordinated with the above mentioned drive systems as it is driven from drive sprocket and over idler sprockets 194 and 196 with drive sprocket 195 being keyed to shaft 45 to which feed roll 42 is mounted. Note also that the rotation of this shaft 48 operating the folding mechanism and stop-operating shaft 49 is coordinated by providing chain connection 199 between sprockets 197 and 198 on shafts 48 and 49, respectively. Shaft 49 can also be coordinated by mounting the sprocket 196 so that its motive power is chain 122. This would eliminate sprocket 197.

Referring now specifically to the operation of the gluing apparatus and to Figures 4 and 5 it can be seen that the glue roll is mounted on shaft 45 so that the blank as it passes between upper feed roll 35 and lower feed roll 36 passes over said glue roll, pressure being applied by means of pressure roll 502. The pressure roll is connected by arm 511 to frame 520 through which jack shaft 108 passes. The shaft 521 carrying sprocket 118 also passes through this frame. The link 511 is rotatably mounted by means of pin 522 to rod 524 which is secured to the lower portion of the frame. The amount of pressure which the pressure roll 502 exerts against the blank as it passes between this roll and the glue roll is determined by the thumb screw 525.

The glue roll is mounted within pan 530 which contains the liquid adhesive and as it rotates in a clockwise direction picks up adhesive from the pan. The level of liquid adhesive in the pan is indicated by dotted line 532. In order that the glue is evenly distributed over the glue roll feed collars 535 and doctor roll 537 are provided. An adjustable scraper blade can also be used for this purpose. The pressure of doctor roll 537 against the glue roll may be varied through an adjustment of thumb screw 538. The glue roll is mounted on shaft 45 and driven at machine speed through an overrunning clutch.

In order that the glue roll shall rotate continuously during the period when the machine is in operation and no blank is pressing against the roll an overrunning clutch 560 is provided which allows the glue roll to be run at a slower speed by the motor 54b. This is accomplished by means of chain 542 and sprockets. The continuously rotating glue roll is necessary in order that the adhesive thereon does not become dried and caked during the time when the machine is not operating and no blank is in contact with the gluer. Thus a fresh supply of liquid adhesive is always available for contacting the upper side panel of the blank which is to be folded.

Obviously the gluing mechanism may be placed on either side of the machine depending on the side panel to which adhesive is to be applied.

The operation of the stop releasing mechanim hereinbefore described and of the folding mechanism may also be seen in a general manner from Figure 3. Thus, upon the rotation of folding shaft 48 the folding bars will operate from the rack and pinion arrangement 165 166 which operates from cams 175 by means of cam followers 172. This is also pointed out in more detail in my parent application Serial No. 474,196.

For the purposes of my present application it is sufiicient to say that by this folding means, full control and timing of the open position, the folding operation and the reopening operation of the folding bars is obtained, particularly since shaft 48 as hereinafter described is driven from the same source of power and, therefore, in synchronism with the feeding device and the hold down device.

The folding mechanism does not complete the folding on the blanks but merely applies a partial fold thereto. The fold is completed by the longitudinally rockable arm 56 which also maintains the fold until the stop 46 is depressed and the blank is conveyed to the stripping mechanism by a slat 90 riding on chain 130. Arm 56 also performs the function of pressing the overlapping panels together so as to firmly secure the glue or other adhesive which has been applied by roll 501.

Referring to Figures 2 and 3 itv can be seen that the motion of this hold down arm 56 is coordinated with the drive mechanism hereinbefore described and is so driven that the rear portion indicated by numeral 57 first touches the blank and then the arm is rocked forward so as to complete the folding of the. blank. Chain 139 driven off of shaft 142 passes over idler 143 and drives shaft 62. The outer surface 63 of shaft 62 is geared and drives gear wheel 64 which in turn drives geared wheel 65.

The eccentric cranks 72 and 73 are operated out of phase so that the downward motion of the arm 84a-94a connected to the rear portion 57 of the hold down bar 56 occurs before the downward motion of the arm 84b94b connected to the front part of the hold down bar.

The reciprocating motion of the arms 94a and 94b is maintained in a vertical plane by guide rollers 95, 96 and 97. Because the chain drive 139 going to the drive shaft 62 is driven from shaft 48 which also drives the folding mechanism (see Figure 3) the rockable bar or arm 56 is coordinated, with the motion of the folding mechanism so that after the blank is partially folded to an extent that the outer longitudinal edges thereof overlap the bar 56 descends and completes the fold by the rockable motion heretofore mentioned and acts as a hold down bar for the folded portion of the blank until such time as the stop means are removed and the blank is ready to be conveyed to the stripping mechanism.

Arms 94a and 94b are secured to their respective extensions 84a and 84b which carry springs 85 by means of the slidable mountings 87.

Safety device 88 consisting of spring biased rollers 89 shuts ofi the folding mechanism in the event that the blanks should pile up underneath the hold down bar 56. Such a pile up would increase the upward pressure on arms 84a and 84b which would in turn open the safety switch 88.

The motion of the rocker arm or bar 56 is illustrated and explained in more detail in connection with the reference to. Figure 4'in my copendimg parent application hereinbefore referred to.

Referring now to Figure 7 in more detail, the blank after being folded is raised from the slats as it rides on bar 295 by an oscillatory stripping member 200 and the fold is held in place by hold down member 201. The co-action between the stripping member 200 and the 6 hold down member 201. maintains the blank in its folded position so that it may be fed directly to the stitcher.

The take ofi or stripping bar operates as follows: Shaft 50 is driven from sprocket 127 which is rotated by chain 122 (see Figures 2 and 3). The crank wheel 128a carries an eccentrically mounted pin 204 which is secured to link 203. Thislink is secured to link 206 by pin 205. The link 206 is pivoted through pin 207 to the mechanism which applies rockable motion to the stripping bar 200. This rockable mechanism consists of links 208 and 210 which are pivoted at 207, 211 and 212, 213, respectively. The pivots 211 and 213 rigidly secure the movable links to the steel stripping bar while the'pivots 207 and 212, respectively apply an oscillatory motion to the stripping bar 200 causing oscillation for each 360 rotation of shaft 50'. The pin 204 can be adjusted on a periphery so as to provide register for the various lengths of box. Instead of being operated from crank 128a the take oif or stripping bar can also be operated from a cam mounted on a worm and worm wheel coupling. The cam would actuate a crank arm on which is attached a cam follower and would impart the same rocking motion as in the case of the crank.

The oscillatory motion is vertical but it is directed at an angle away from the direction of feed of the blank. Thus, the stripper tends to both lift and ride with the blank at the same time. Since the oscillatory motion provided through shaft 50' ispart of the drive system for the rest of the machine as seen from Figure 3, the stripping operation can be readily coordinated with the movement of the blank as it comes from the folding operation.

As shown more clearly in Figures 1 and 7, two strippers of the nature herein described are used on either side; of the machine. The position of the strippers before the arrival of a blank isgshown by the dotted line and the numeral 200' and its position as a blank enters the spacing between the stripper and the hold down bar is shown by thesolid line and numeral 200..

Similarly, the hold down bar 201 removes from a lower position 201' to an upper position as shown .by 201, as the blank is stripped ofi of conveyor chain 130 and away from the feed bar by the dual stripping mechanism. In order to assure that the hold .down bar acts in cooperation with the stripper a link 312 is provided which is pivoted at 213 to the link 206 which provides the oscillatory stripper motion. The other end of link 312 is pivoted at pin 214 to arm 215 which in turn is pivoted at 218 to member 220 which is slidably secured by pin 322 to the hold down bar 201.

Thus, as the stripper bar moves up and to the right a similar motion is imparted to the hold down bar so that suificient space is allowed for the blank to pass between these two bars, while at the same time the fold in the blank is maintained. The passage of the blank between the two bars is more clearly seen in Figure 7 where'in'the solid lines show the position of the blank, hold down and stripper bars before stripping and the dotted lines show the upward movement of these elements after the blank has been stripped from the slats.

Roller 320 provides additional support for the blank as it passes between the straightening rolls 222. In connection with the hold down bar 201 note that pivots 230 and 232 in connection with piece 234 allow for the movement of the other end of the hold down bar in a fashion similar to that described in connection with the pivots 218 and 222. Both pivots 222 and 232 are slidably mounted in a manner so as to allow a desired amount of vertical tolerance with respect to the motion of the hold down bar.

After being stripped the blank passes underneath safety device 240. Should the blanks pile up at this point the arm 240 will rise and pivot around pin 245 so that it disconnects with the contacts 242 and thereby shuts oif the machine.

The machine isso' arrangedi n time that as soon as the stops 46 are depressed by the action of the cams 50 slat'90 mounted across the chains 130 moves up and into engagement with the rear of the folded blank and moves the blank beneath the hold down strip 295 which is adjustably supported so that it extends just in front of the stops and up to the point where the stripping mechanism removes the blank from the slats. The front end of hold down strip 295 is curved upwardly so that panels which tend to spring up after being folded will be guided down again and their edges brought to abutting position. Also provided is a guide strip 296 over which the blank is folded and which runs the full length of the folder. I

Referring again to the top plan view in Figure 1 and Figure 6, it can be seen that the straightening rolls 222 are mounted on stub shafts 221 and supported on adjustable plates 302. Then the plates are adjusted so that the peripheries of the aligned rollers 222 on each side are spaced apart by a distance which is slightly less than the width of the folded blank.

The slats 90 force the blank between the rolls with the edges of the blank riding against the row on each side. Since the rolls are thus spaced slightly closer together than the width of the blank and crease or fold is adjusted and spread vertically.

All members which engage the edges of the blanks are provided with nuts which in turn are driven by screws all of which may be driven from a common source on each side of the machine in order to adjust the machine for different widths of blanks.

Figure 1 shows how all adjustments on one side of the machine may be driven from a common chain 400 which passes over sprockets 401-407. The various adjusting screws appear in Figure 1 as elements 410-415. Since the adjusting mechanism is not considered an essential part of my invention it is not necessary to describe it herein in further detail. Attention is called, however, to the description of this type of adjusting mechanism in my prior Patent Nos. 2,583,712 and 2,622,493.

In the foregoing, I have described my invention only in connection with preferred embodiments thereof. Many variations and modifications of the principles of my invention within the scope of the description herein are obvious. Accordingly, I prefer to be bound not by the specific disclosure herein, but only by the appending claims.

I claim:

1. In a folding machine for forming flat collapsed tubular box blanks from flat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangement; means for continuously moving said blanks successively into a position to be folded; means for applying adhesive to foldable side sections of the said moving blanks; means for stopping said blanks when said blanks have reached such position; means for folding over each of said side sections while said blanks are halted so that said sections overlap; pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded; oscillatory upwardly moving means for stripping the folded blank from the blank moving means, means for maintaining the fold in the stripped blank; said last recited means and said oscillatory means being maintained in spaced apart relationship while in engagement with said blanks.

2. In a folding machine for forming flat collapsed tubular box blanks from fiat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangements; means for continuously moving said blanks successively into a position to be folded; means for applying adhesive to foldable side sections of the said moving blanks; means for stopping said blanks whensaid blanks have reached such position means forfolgling over each of said side sections while said blanks arehalted so that said side sections overlap; rockable pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded; oscillatoryu pwardly movingsmeans for stripping the folded blank from the blank moving means, means for holding down the stripped blank, the movement of said holding means being coordinated with the movement of said stripping means; said last recited means and said oscillatory means being maintained in spaced apart relationship whilein engagement with said blanks.

3. In a folding machine forforming fiat collapsed tubular box blanks from fiat, and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangement; each of said sheets also including a center section between said score lines, means for applying adhesive to foldable side sections of the said moving blanks; stop members mounted on said machine; means for continuously moving said blank successively against said stop members in a position to be folded; means for folding over each of said side sections while said blanks are halted so that said side sections overlap, said folding means comprising a pair of folding bars extending in the direction of movement of the blank and rotatable about an axis parallel to the score lines defining said longitudinally extending side sections; longitudinally rockable pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded; and upwardly moving means for stripping the folded blank from the blank moving means while maintaining the portions of said side sections which have had glue applied thereto spaced from said center section.

4. In a folding machine for forming fiat collapsed tubular box blanks from fiat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangements; each of said sheets also including a center section between said score lines, means for applying adhesive to the lower surface of one of the foldable side sections of the said moving blank; stop members mounted on said machine; means for continuously moving said blank successively against said stop members in a position to be folded; means for folding over each side section while said blanks are halted so that said side sections overlap, longitudinally rockable pressure means for completing the fold in said blanks, means for moving said blanks from said folding position after the same have been folded; and upwardly moving means for stripping the folded blank from the blank moving means while maintaining the portions of said side sections which have had glue applied thereto spaced from said center section.

5. In a folding machine for forming fiat collapsed tubular box blanks from fiat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangements; means for continuously moving said blanks successively into a position to be folded; means for applying adhesive to a surface of one of the foldable side sections of the said moving blank; means for stopping said blanks when said blanks have reached such position; means for successively folding over each of said side sections while said blanks are halted so that said side sections overlap, said folding means comprising a pair of folding bars extending in the direction of movement of the blank and rotatable about an axis parallel to the score lines defining said longitudinally extending side sections, longitudinally rockable pressure means for completing the fold in said blanks, means for moving. said blanks from said folding position after the same have been folded; upwardly moving means for stripping the folded blank from the blank moving means; and pressure means for maintaining the fold in the blank; the last two recited of said means being maintained in spaced apart relationship while in engagement with said blanks.

' 6. In a folding machine for forming flat and collapsed tubular box blanks from flat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangement; each of said sheets also including'a center section between said score lines; roller means for applying adhesive to a portion of the under side of one of said side sections, pressure means for maintaining the full length of the blank in contact with said roller means; means for stopping said blanks when said blanks'have reached such position; means for successively folding over each of said side sections while said blanks are halted so that said side sections overlap; longitudinally rockable pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded, oscillatory and upwardly moving means for stripping the folded blank from the blank moving means while maintaining the portions of said side sections which have had glue applied thereto spaced from said center section.

7. In a folding machine for forming fiat collapsed tubular box blanks from flat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangements; each of said sheets also including a center section between said score lines; roller means for applying adhesive to a longitudinal portion of one of said side section-s, pressure means for maintaining the full length of the blank in contact with said rollar means; means for stopping said blanks when said blanks have reached such position; means for successively folding over each of said side sections while said blanks are halted so that said side sections overlap; longitudinally rockable pressure means for completing the fold in said blanks, means for moving said blanks from said folding position after the same have been folded; the said pressure means having a forwardly rocking motion and being operatively coordinated with the movement of the said blanks; oscillatory means for stripping the folded blank from the blank moving means, and means for holding down the stripped blank; said stripping means being operable in an upward direction so as to cooperate with the movement of the blank, and being operatively connected to apparatus for holding down the fold in said blank so that the stripping means and the hold down means oscillate simultaneously in the same direction while maintaining the portions of said side sections which have had glue applied thereto spaced from said center section.

8. In a folding machine for forming flat collapsed tubular box blanks from flat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangement; each of said sheets also including a center section between said score lines; roller means for applying adhesive to a longitudinal portion of one of said side sections, pressure means for maintaining the full length of the blank in contact with said roller means; means for stopping said blanks when said blanks have reached such position; means for successively folding over each of said side sections 'while said blanks are halted so that said side sections overlap; rockable pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded; the said pressure means having a forwardly rocking motion and being operatively coordinated with the movement of the said blanks; and oscillatory means for stripping the folded blank from the blank moving means;

said stripping means being operable in an upward direction so asto cooperate with the movement of the blank, and being operatively connected to apparatus for holding downthe fold in said blank so that the stripping means and the holding down means oscillate simultaneously in the same direction while maintaining the portions of said side sectionswhich have had glue applied thereto spaced from said center section.

9. In a folding machine for forming flat collapsed tubular box blanks from flat and scored sheets, said sheets having a pairof longitudinally extending side sections defined by score lines'and foldable about said score lines into said collapsed tubular arrangement; each of said sheets also including a center section between said score lines; roller means for applying adhesive to a portion of one of said ,side sections, pressure means for maintaining the full length of the blank in contact with said roller means; stop members mounted on said machine; apparatus for moving said blanks successively against said stop member, meansfor folding over the side sections, the completion of said folding operation releasing said blanks from said stops; said folding means comprising apparatus for successively folding over each of said side sections while said blanks are halted so that said side sections overlap; longitudinally rockable pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded; and oscillatory means for stripping the folded blank from the blank moving means; said stripping means being operable in an upward direction so as to cooperate with the movement of the blank, and being operatively connected to apparatus for holding down the fold in said blank so that the stripping means and the holding down means oscillate simultaneously in the same direction while maintaining the portions of said side sections which have had glue applied thereto spaced from said center section.

10. In a follding machine for forming flat collapsed tubular box blanks from flat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangement; means for continuously moving said blanks successively into a position to be folded; roller means for applying adhesive to a longitudinal portion of one of said side sections, pressure means for maintaining the full length of V the blank in contact with said roller means, and clutch means for continuously rotating said roller means when it is not in contact with the blank; means for stopping said blanks when said blanks have reached such position; means for successively folding over each of said side sections while said blanks are halted so that said side sections overlap; longitudinally rockable pressure means for completing the fold in said blanks; means for moving said blanks from said folding position after the same have been folded; said pressure means being operated by two eccentrically mounted cranks which rotate out of phase and thereby cause the arm of said pressure means to hit a back portion of the blank and rock forward so as to successively contact the more forward portions of the blank; oscillatory means for stripping the folded blank from the blank moving means; said stripping means being operable in an upward direc tion so as to cooperate with the movement of the blank, and being operatively connected to apparatus for holding down the fold in said blank so that the stripping means and the hold down means oscillate simultaneously in the same direction.

11. In a folding machine for forming flat collapsed tubular box blanks from flat and scored sheets, said sheets having a pair of longitudinally extending side sections defined by score lines and foldable about said score lines into said collapsed tubular arrangement; means for continuously moving said blanks successively H 11 .7 into a position to be foldedyrollermeans for applying adhesive to a longitudinal portion of the under side of one of said side sections, pressure means for maintaining the full length of the blank in contact with said roller means, and clutch means for continuously rotating said roller means when it is not in contact with the blank; means for stopping said blanks when said blanks have reached such position; means for successively folding over each of said side sections while said blanks are halted so that said side sections overlap; longitudinally rockable pressure means for completing the fold in said blanks; means for moving said blanks from sald folding position after the same have been folded; said pressure means being operated by two eccentrically mounted cranks which rotate out of phase and thereby cause the arm of said pressure means to hit a back portion of the blank and rock forward so as to successively contact the more forward portions of the blank; oscillatory means for stripping the folded blank from the blank moving means, "and being operatively connected to apparatus for holding down the fold in the said blank so that the stripping means and the hold down means oscillate simultaneously in the same direction; and common drive means for coordinating the movement of the blank conveying means, folding means, stripping means and hold down means.

References Cited in the file of this patent UNITED STATES PATENTS 549,571 Koffenberger Nov. 12, 1895 992,244 Potdevin May 16, 1911 1,505,178 Wade et al. Aug. 19, 1924 1,757,730 McPike May 6, 1930 2,017,535 Hammer Oct. 15, 1935 2,633,063 Ohrn Mar. 31, 1953 2,837,012 Burroughs June 3, 1958

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