US846119A - Turning-arm-actuating mechanism for bag-turning machines. - Google Patents

Description

PATENTED MAR. 5, 1907.

' v s; T. LOGKWOOD.

TURNING ARM AGTUATING MECHANISM FOR BAG, TURNING MACHINES.

APPLICATION FILED JAN.15.1906.

PATENTBD MAR. 5, 1907.

s. T. LOGKWOOD. TURNING ARM AOTUATING MECHANISM FOR BAG TURNING MACHINES;

APPLIOATION FILED JAN. 15. 1906. 3 SHEETB BHBBT Z WU 7 Joa woaal mamas rs'Rs 50., WASHINGTON. o. c.

clear, and exact .tudinally-reciprocatin SAMUEL T. LOCKWOOD,

OF PORTLAND, OREGON TURNlNG-ARlVl-ACTUATING MECHANISM FOR BAG-TURNING MACHINES.

its. 846,1 19.

Specification of Letters Patent.

Patented Maren 5, 1907.

Application filed January 15,1906- Serial No 296,182.

T at 20720771, it nut concern:

Be it known that I, SAMUEL T. LocKwooD, a citizen of the United States, of Portland, in the county of Multnomah and State of Ore gon, have invented certain new and useful Improvements in Turning-Arm-Actuating Mechanism for Bag-Turning Machines; and 1 do hereby declare that the following is a full,

description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in bag-turning machines, and refers more specifically to an improved means of mounting and operating the reciprocating bag-turning arms by which the bags are turned and presented to the stripping and the pressing or flatening rollers.

My improvements are applicable to the general type ofmachine illustrated in my prior United States Letters Patent, No. 350,204, granted October 15, 1886, and are herein shown as embodied in a machine having certain of the specific structural features illustrated in my copending application for United States Letters Patent, Serial N 0. 296,181, filed on the 15th day of January, 1906.

The invention consists in the matters hereinafter set forth, and more pointed out in the appended claims.

In the drawings, Figure l is a central vertical section of the central part and one end of a bag-turning machine embodying my invention. Fig. 2 is a plan View of the frame and carriage and illustrating the manner of mounting the bag-turning arms. Fig. 3 is a similar view showing the bag-turning arms in a changed position. Fig. 4 is a transverse vertical section taken on line 4 4 of Fig. 1. Fig. 5 is a detail, partly in section and partly in elevation, illustrating the manner of operating the bag-turning arms and adjusting the distance between them. Fig. 6 is a detail section taken on line 6 6 of Fig. 2.

My improvements are shown as adapted to a double machine, embracing two folding mechanisms and a single intermediate longig part or carriage upon which are mounted two pairs of oppositelyoperating bag-turning arms that present the turned bags to the pressing-rollers, one of the pairs of arms presenting a turned bag to one pair of pressing-rollers while the other pair particularly of arms are being retired from their associated pressing-rollers, the arms being thus alternately presented to the work by a single actuating mechanism. The improvements may, however, be applied to a single machine or one having but one turning mechanism.

My improvements relate to mechanism for giving longitudinally-reciprocatory motion to the bag-turning arms and for spreading the same outwardly during their outward movement and also to means for adjusting said gag-turning arms to suit different widths of ags.

As shown in the drawings, 10 designates as a whole the central frame, on which the bagturning arms are mounted, and 11 designates as a whole one of the bag-turning mechanisms, the essential features of which embrace bag-holders 12 and the flattening-rollers 13. The frame 10 embraces top side rails 14 14, bottom side rails 15 15, standards 16, and transverse members 16, as more clearly shown in Figs. 1 and 4. Mounted toslide longitudinally of the upper rails of said frame is a carriage consisting, essentially, of a central longitudinal member 17 and transverse members 18 and 19. The transverse carriage member 18 is located near the center of the carriage, and in a completed machine two transverse members 19 are provided, located one on each side of the member 18.

20 20 designate bag-turning arms arranged in two pairs, as herein shown, and directed toward the opposite ends of the machine. Said arms consist of rods which are hinged at their inner ends to central carriage transverse member 18 by means of pivot-pins 21. Said arms diverge from each other toward their outer ends and are engaged between their ends with rotative pivot studs 23, mounted on said transverse members 19 of the carriage, the studs of each pair being located one on each side of the longitudinal center of the machine, said pivot-studs being provided with openings through which said rods extend. Said pivot-studs of each pair are rotatively mounted in slide-bars 24one at each side of the longitudinal center of the l machineand fit in grooves or ways formed l in the upper face of said transverse members, I whereby said studs and the rods carried theret by may be'moved or spread laterally out- I wardly by means hereinafter described as the bag-turning arms are moved longitudinally outwardly toward the bag turning l mechanisms. The said slide-bars 24 are held in said guide-grooves or ways by plates 25, Fig. 6, fastened to the upper faces of said transverse members and overhanging said channels or ways therein.

The means herein shown for spreading the bagturning arms laterally as the carriage is moved longitudinally toward one of the turning and pressing mechanisms comprises a longitudinal cam or cam-bar 26, Figs. 2 and 3, located centrally of the machine and between the turning-arms and fastened to the cross members 16 of the frame. In the type of machine shown two of such cam-bars will be employed. Each of said cam bars or plates 26 cooperates with rollers 27, carried by studs 28, Figs. 4, 5, and. 6, attached to and depending from the sliding bars 24 through longitudinal slots 29, Fig. 5, in the transverse carriage members 19. Two of said roller-bearing stud s 28 are provided'one on each side of the longitudinal center of the machm ethe rollers of each pair engaging the opposite inclined sides of the associated cambar. The cam bars or plates 26 are made narrowest at their inner ends, and said rollers of the studs are spread gradually apart by their engagement with the gradually-widening cam-bars as the carriage is moved outwardly, thereby spreading laterally the outer ends of the turning-arms for the purpose set forth.

In Fig. 2 the carriage is shown at one extreme limit of its throw with the outer ends of the bag-turning arms occupying their laterally innermost positions, while in Fig. 3 the carriage is shown having been moved out wardly to the opposite limit of its throw, thereby spreading the turning arms. The said bag-turning arms are restored to their inner positions when released from the influ ence of the cam bars by spring actuated devices made as follows: 30 I30 designate L-shaped levers pivoted to lugs 31, extending inwardly from the transverse carriage members 19. The longer arms of said levers bear at their outer ends against the laterally outer sides of the studs 28, while the shorter arms thereof bear against springs which tend to force the studs 28 laterally inwardly toward each other. As herein shown, said springs have the form of spiral expansivolyacting springs 32, which surround studs or bolts 33, that extend inwardly or rearwardly from the transverse carriage members 19, and said springs are interposed between nuts or other suitably-formed shoulders 34 at the inner ends of the bolts and the short memb ers of said L-shaped levers 30, which latter are apertured to pass over said studs or bolts 33, as indicated. in dotted lines in Figs. 2 and 3.

Means are provided for adjusting the pivot-studs 23 toward and from each other to adapt the arms to bags of different widths. As herein shown such adjustment is ell' ected are carried directly by adjusting-plates 35, that have adjustable sliding engagement in grooves 36 of the slide-bars 24. Said plates have tapered margins, which engage the cor- .respondingly tapered or undercut side margins in the grooves 36. Said adjustingplates are adjustably fixed to said sliding bars 24 by means of screw-bolts 37, that extend through slots 38 in said adjusting-plates and have screw-threaded engagement with the sliding bars, as most clearly shown in Fig. 5. "the particular manner herein shown of mounting the pivot-studs 23 in said adjustingplates 35 consists in providing said studs with reduced neck portions or shanks 40, which extend downwardly through bear ing-apertures in the adjusting-plates 35 and held in place by screws 41, which extend upwardly through plates or washers 42 into apertures in said shank or neck 40. Said plates 42 lit in suitable recesses in the bottoms of the adjusting-plates, flush with the lower faces of the latter, and are made of slightly greater diameter than the openings of the ad justing-plates, which receive the shanks of said studs. This construction permits free rotation of the studs and provides a simple and effective means of attaching the studs to the adjusting-plates. It will be understood, of course, that said studs are attached to the adjusting-plates before the latter are inserted in the sliding bars 24.

Referring now to the means for giving endwise reciprocatory motion to the carriage and the bag-turning arms carried thereby, the mechanism herein shown for effecting this result is made as follows: 45 designates a slide which has longitudinally-reciprocating movement in a guide or way formed in an inwardly-projecting ledge or shelf 46, attached to one of the lower side members of the frame, as shown in Figs. 1 and 4. Said slide carries at its upper margin a straight rack 47, that meshes with a gear-pinion 48, fixed to a shaft 49, that extends transversely across the frame. Said shaft is rotatively mounted in bearings 50, carried by horizontal bars 51. 51, one on each side of the machine and extending between adjacent uprights or standards of said frame. Said transverse shaft 49 carries also a larger gear-wheel 52, that meshes with a downwardly-facing rackbar 53, that is fixed to the under side of the carriage. The slide 45 and the rack-bar carried thereb r are iven lon itudinal movement through the medium of a connecting link or pitm an 55, that is hinged. at its inner end to the slide-bar by means of a transverse hinge-pin and is connected at its outer end to a crank-pin 57, (shown in dotted lines in Fig. 1,) fixed to a crank-disk 58, mounted on a shaft 59, extending transversely across the machine-frame at one end of one of the bag-turning mechanisms. 'l he said shaft 59 b the followin mechanism: The studs is rotated from the main shaft 60 located is l with said turning-arms and traveling against transversely over the shaft 59 and having a gear-pinion 61, that meshes with the gearwheel 62 on said shaft 59. Said shaft is provided with a belt-pulley 63, by which power is transmitted thereto.

I claim as my invention- 1. In a bag-turning machine, the combination with longitudinally-reciprocating, pivoted bag-turning arms, of an elongated cam located centrally of said arms for spreading the outer ends of said arms during the longitudinal reciprocation thereof.

2. In a bag-turning machine, the combination with the frame and a carriage reciprocating on said frame, of bag-turning arms carried by and pivoted to the frame and a contrally-located cam for spreading the arms during the longitudinal reciprocation of the carriage.

3. In a bag-turning machine, the combination with the frame and a carriage reciprocating thereon, of bag-turning arms carried by and pivoted to said carriage, a centrally-located cam or cam-bar having opposing tapered sides and lugs or projections associated the inclined faces of the cam during the longi tudinal reciprocation of the carriage.

4. In a bag-turning machine, the combination with the frame and a carriage reciprocat ing thereon, of. bag-turning arms pivoted at their inner ends to the carriage, studs rotatively mounted on said carriage and engaging the arms between the ends thereof, and a centrally-looated'cam for spreading the arms during the longitudinal reciprocation of the carriage.

5. In a bag-turning machine, thecombination with the frame and a carriage reciprocating thereon, of bag-turning arms pivoted at their inner ends to the carriage, studs rotatively mounted on said carriage and engaging said arms between the ends thereof, a centrally-located cam having inclined faces and studs associated with said arms and traveling against the inclined margins of said cam.

6. In a bag-turning machine, the combination with the frame and a carriage reciprocating thereon, of bag-turning arms carried by and pivoted to the carriage, rotative studs engaging said arms, laterally-sliding bars on l the carriage by which said studs are carried, and a centrally-located cam for spreading or separating said bars during the longitudinal reciprocation of the carriage.

7. In a bag-turning machine, the combination with the frame and a carriage reciprocating thereon, of bag-turning arms carried by and pivoted at their inner ends to the carriage, rotative studs engaging said arms between their ends, laterally-sliding bars mounted on the carriage by which said studs are carried, roller-bearing studs depending from said slide-bars and a centrally-located cam against the inclined faces of which the roller-bearing studs travel during the reciprocation of the carriage.

8. In a bag-turning machine, the combination with the frame and a carriage reciproeating thereon, of bag-turning arms pivoted at their inner ends to the carriage, rotative studs engaging said arms between their ends, laterally-sliding bars mounted on the carriage by which said studs are carried, a centrally-located cam mounted on the frame for spreading said sliding bars and arms during the reciprocation of the carriage, and means for fixedly adjusting the rotative studs toward and away from each other.

9. In a bag-turning machine, the combina tion with the frame, and a carriage reciproeating thereon, of bag-turning arms pivoted to said frame, a centrally-located cam for spreading the arms during the reciprocation of the carriage, and springs for restoring the arms toward each other when released from said cam.

10. In a bag-turning machine, the combination with the frame and a reciprocating carriage thereon, of bag-turning arms carried by and pivoted at their inner ends to the carriage, rotative studs mounted on the carriage and engaging the bag-turning arms be tween the ends of the latter, a centrally-located, stationary cam or cam-bar operating to spread said studs apart during the longitudinal reciprocation of the carriage, and springs applied to move said studs inwardly when released from the cam.

11. In a bag-turning machine, the combi nation with a frame and a carriage reciproeating thereon, of bag-turning arms carried by and pivoted at their inner ends to the carriage, rotative studs mounted on the car riage with which the arms are engaged, laterally-sliding bars upon which said rotative studs are mounted, studs depending from said bars, a centrally-located cam or cam-bar adapted for engagement by the studs to spread the arms laterally outwardly during the longitudinal reciprocation of the carriage, and springs applied to normally hold said slide-bars in their innermost positions.

12. In a bag-turning machine, the combination with the frame, a carriage reciprocating on the frame, and a bag holding and pressing mechanism at one end of the frame, of bag-turning arms carried by the carriage, means for spreading the arms away from each other during their movement toward said holding and pressing mechanism, and means for reciprocating said carriage comprising a rack on the under surface of said carriage, a longitudinally-sliding rack in the frame, and gears interposed between said racks.

13. In a bag-turning machine, the combination with the frame, a carriage reciprocating thereon and a bag holding and pressing mechanism at one end of the frame, of bagturning arms carried by and pivoted to the carriage, a centrally-located cam for spreading the arms during the movement thereof toward the holding and pressing mechanism, and means for reciprocating said carriage comprising a rack on the under surface of said carriage, a longitudinally-sliding rack in the frame, a shaft mounted transversely in the machine-frame, a gear-pinion fixed thereto and meshing with said frame-rack and a larger gear-wheel fixed also to said shaft and meshing also with the carriage-rack.

14. In a bag-turning machine, the combination with the frame, a carriage reciprocating on the frame, and a bag holding and pressing mechanism at one end of the frame, of bag-turning arms carried by the carriage,

] means for spreading the arms away from each other during their movement toward said holding and pressing mechanism, and means for reciprocating said carriage comprising a rack on the under surface of said carriage, a longitudinally-sliding rack in the frame, gears interposed between said racks, a crank rotating in unison with the bag holding and pressing mechanism, and a pitrnan connecting said frame-rack with said crank. In testimony that I claim the foregoing as my invention I a'llix my signature, in pres ence of two witnesses, this 5th day of January, A. D. 1906 SAMUEL T. LOCKWOOD. Witnesses ERNEST H. LooKwoon, CAROLINE Sonnnrz.

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