US846118A

US846118A - Bag-holding mechanism for bag-turning machines.

Info

Publication number: US846118A
Application number: US29618106A
Authority: US
Inventors: Samuel T Lockwood
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-01-15
Filing date: 1906-01-15
Publication date: 1907-03-05
Anticipated expiration: 1924-03-05

Description

No. 846,118. I PATENTEDM'AR.5,1907. S.'T. LOOKWOOD.

BAG HOLDING MECHANISM FOR BAG TURNING MACHINES; APPLICATION FILED J'AN.15.1906.

6 SHEETB-SHEET l.

rs: NORRIS nn'rns cm, \ulnmcrolv, o. c.

No. 846,118. PATENTED MAR. 5, 1907.

sir. LOOKWOOD.

BAG HOLDING MECHANISM FOR. BAG TURNING MACHINES. APPLICATION FILED JAN.15.1906.

6 snsbrs-snnnw 2.

THE nomzls FIYERS co., WASH rum-on, 0. c4

No 846,118. PATENTED MAR. 5, 1907.

- S. T. LOCKWOOD. BAG HOLDING MECHANISM FOR BAG TURNING MACHINES.

APPLIOATION FILED JAN. 15. 1906- 6 SHEETS-SHEET 3 Na. 846,118. PATENTED MAR. 5, 1907.

s. LOGKWOOD. BAG HOLDING MECHANISM FOR BAG TURNING MACHINES.

APPLICATION FILED I AN.15.1906.

6 SHEETS-SHEET 4.

fans :0, WASHINGTON, n. c.

No. 846,118. I PATENTED MAR. 5, 1907.

s. T. LOGKWO0D..

BAG HOLDING' MECHANISM FOR BAG TURNING MACHINES.

' APPLIO4TION FILED JAN.15. 1906.

6 SHEETS-SHEET 5.

Wiesses J3 Jive/Z251,

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rn: mam: plrnls cm, wlsnma nn, n. c.

PATENTED MAR. 5, 1907.

s. T. LOOKWOOD. J v BAG HOLDING MECHANISM FOR BAG TURNING MACHINES.

APPLIOATION IILED JANJS, 1906.

6 SHEETSSHEET e" \uillill -Q UNITED STATES PATENT OFFICE.

SAMUEL T. LOOKWOOD, OF PORTLAND, OREGON.

Specification of Letters Patent.

Patented March 5, 1907.

Application filed January 15, 1906. Serial No. 296,181-

To all whom, it may concern:

Be it known that I, SAMUEL T. LOCK- thereof.

WOOD, a citizen of the United States, of lortland, in the county of Multnomah and State of Oregon, have lnvented certain new and useful improvements in Bag ltlolding Mechanism for Bag-Turning Machines; and I do hereby declare that the following is a full, clear, and exact 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 of the general type shown in my prior United States Letters 1 atent, No. 777,427, granted December 13, 190 1; and the invention relates more specifically to improvements in the bag-holding mechanism by which the bag is held preparatory to the turning operation and to the means for operating said holding mechanism to open the bag-mouth to receive the turning-arms.

Among the principal objects of my invention is to provide means for releasing the tension exerted by the bag-holders upon the mouth of the bag after the bag has been partially turned and before the turning-arms are brought into contact with the bag-bottom, and thereby facilitating the release of the bag from the holders and avoid liability of the bottom of the bag being punctured by the bag-turning arms.

A further object of the invention is to provide a tension'releasing or slacking mechanism of this character which may be adjusted to bags of various lengths. I

A still further object of the invention is to provide an improved mechanism for imparting a step-by-step rotation to the bag-holders when using holders of the character shown in my aforesaid prior Letters Patent.

Another object of the invention is to provide means for arresting the rotation of the bag-holders after the same have been rotated the required angular distance, and thereby avoid overthrow of the holders due to their momentum when the holders are turning idly and without the bags thereon.

Other objects of the invention will appear from the following description, and the invention is set forth in the appended claims.

In the drawings, Figure 1 is a top plan view, partially broken away, of one end of a bag-turning machine embodying my im provements. Fig. 2 is a partial side elevation and partial vertical longitudinal section Fig. 3 is a transverse vertical section taken through the frame that supports the carriage which carries the bag-ruining arms looking toward the bag iolding and pressing mechanism. Fig. 4 is a detail illustrating a portion of one of the bag-holders, its operating-shaft, and bearing therefor. Big. 5 is an end elevation of the machine w ith the fly and fly-frame removed. Fig. 5 is a detail illustrating the gearing for driving the stripper-rollers. Pig. 6 is a cross-section taken on line 6 6 ol i ig. 8. Fig. 7 is a detail in side elevation, illustrating the niechanisni for operating the bag-holders. Fig. 8 is a frontelevation of one end of the l: ag-holdcrs, showing a portion of the niechanism ior operating the same in section, the latter section being taken on line 8 8 of l ig. 6. Fig. 9 is a view, partially in side elevation and partially in section, showing the l:ag-holdcr-operaiing mechanism and pressing-rollers. l ig. 10 is a detail illustrating 11162111S for varying the tension of the holder-actuating mechanism. l ig. 11 is a sectional detail of the tine-shaft and cam thereof for relieving the tension on the bags while on the holder.

The machine herein shovn is of that type known as a doulc le machine, or one v herein the single actuating mechanism for the carriage operates two pairs of turning-arms eX- tending oppositely from the central carriage or support and cofilperates v ith two bag holding and pressing mechanisms located one at each end of the carriage-frame. My improvements may, however, be employed in a machine having but a single bag holding and pressing mechanism.

As shown in the dravings, 12 indicates as a whole the frame for supporting the centrally-located carriage (not shoe n) that carries the bag-turning arms 13. The frame for the bag-holders and pressing-rollers embraces veltical standards 14 14, which carry the bearings for the shafts of the stripperrollers and pressing-rollers and upper and lower longitudinal rails 15 16, respectively. The upright frame members are connected at their upper ends by a transverse member 14 17 designates the main shaft of the machine mounted in hearings in the standards 14 and provided at one side of the machinewith fast and loose belt-pulleys 18 19. When the machine is providcd vith two bag-holding and pressing mechanisms, such mechanism on the end of the machine opposite that shown is operated from the main shafts 17 through the medium of a horizontal shaft 20, extending longitudinally of the machine and connected with the shafts 17 through the me dium of intermeshing gears 21 22, respectively.

23 designates a counter-shaft, hereinafter termed the time-shaft, mounted in the standards 14 below the main shaft 17 and. driven from said main shaft 17 through the medium of a pinion 24 on the main shaft and a gear-wheel 25 on the counter-shaft, Figs. 3 and 5.

26 26 designate the pressing-rollers, the shafts of which are mounted in bearings supported on the upper parts of said standards 14. The shafts of said pressing-rollers 26 extend outside of the standards at one side of the frame and are provided with intermeshing gear-wheels 27 27, the lower one of which has meshing engagement with a gear wheel 28, Figs. 3 and 5, fixed to the outer or adjacent end of the main shaft 17, whereby said pressing-rollers are driven from the main shaft. Located in front of said pressing-rollers are stripperrollers 30 and 31, the shafts 32 32" of which are mounted in bearings-carried by the standards14. The shaft 32 of the lower roller is provided at one side of the machine, outside of the standard 14, with a pinion 33, Fig. 5*, which meshes with a pinion 34, mounted on a stub-shaft 35, fixed in said standard and driven by a gear-wheel 36, fixed to the adjacent end of the shaft of the lower pressing-roller 26. The shafts of the upper and lower stripper-rollers are provided at the opposite side of the machine with meshing rollers 37 38, Fig. 5, whereby the upper stripper-roller is driven from the lower roller. The lower stripper-roller comprises, as herein shown, a continuous roller, while the upper stripper-roller comprises two short roller-sections which are fixed on the shaft 32*. Said upper roller-sections are adapted to be moved toward and from each other, as will hereinafter be described, for the purpose of adjusting the machine to bags of different widths.

4O designates the fly by which the turned and pressed bags are removed from the pressing-rollers. Said fly is fixed to a rockshaft 41, that is mounted in an extensionframe 42 and is operated by a cam 43 on the time-shaft, a swinging lever 44, pivoted at its upper end to the machine-frame and provided between its ends with a roller 45, engaging the periphery of said cam, and a pitman or connectingrod 46, connected at one end with the lower end of said lever and at its other end, through the medium of a crank 47, with the rockshaft 41. The fly is drawn 1 to its uppermost position by the cam and is restored to 1ts lowermost position by a spiral sprmg 48, surrounding an endw1se-rec1proeating rod 49, hinged at one end to said crank-arm 47 and having guiding engagement with the frame of the machine, said spring 48 being interposed between the guide 50 for the rod on the machine-frame and a nut 57 on the rod.

52 52 designate as a whole the bag-holders, made generally like the bag-holders shown in my aforesaid'prior patent, No. 777,427.

Said holders consist of two flat rotative plates 52 52 rotating in vertical planes and located one on each side of the longitudinal center of the machine and provided with inwardly-extending bagholding arms 53, three being herein shown, which extend toward the retracted position of the bag-turning arms. The arms of the two holders operate in pairs-that is to say, the mouth of the bag is adapted to be placed over and held by two corresponding arms of the two holders when located, by reason of their rotation, close to each other, and as such holders rotate, said arms are separated in a manner to spread or distend the mouth of the bag and to hold the same spread in position for the turning-arms to turn the body of the bag therethrough. While one pair of said arms thus holds one bag distended another pair is in position toreceive another bag, which in the subsequent rotation of the holders is stretched and brought into line with the turning-arms. A step-by-step rotation is imparted to said holders, which move the cor responding arms of the two holders successively into and outof their operative positions. The said plates 52 of the holders are mounted on short shafts 54, Fig. 4, which have bearing in blocks 55, mounted on and movable endwise of a horizontal stationary shaft 56, which extends transversely across the machine'and is fixed at its ends in standards 57, that rise from the upper horizontal rails 15 of the machine-frame. As herein shown, the plates 52' of the bag-holders are fixed to the shafts54 through the medium of flanged sleeves 58, keyed to the shafts '54 and provided in their flanges 59 with curved slots 60, (indicated in dotted lines in Fig. 8,) through which extend screw-bolts 61, that have screw-threaded engagement with apertured holes in the plates 52 The curved slots 60 are intended to permit angular adjustment of the holder-plates with respect to their shafts. The said holder-plates 52 have also central screw-threaded apertures, and the shafts 54 are provided with reduced screv-threaded extensions 62, that have screw-threaded engagement with said plates. The said shafts are provided with beveled pinions 63, by which power is transmitted to turn the holders.

64 designates a horizontal transverselydisposed shaft that is rotatively mounted in brackets 65, extending rearwardly from the standards 57, Figs. 1 and 7. Said shaft 64 of different widths.

ca-rries two beveled pinions 66 66, which,

meshwith the gearp'inions 63 of the holdershafts 54 and are splined to said shaft to other in order to adapt the machine to bags 1 For this purpose eac h shaft-bearing 55, which is mounted on :the transverse rod 56 ,before 'referred to, is provided with arms 67 67, which extend outwardly or rearwardly from said bearings and are apertured at their outer ends to fit over the rotary shaft 64 on opposite sides of the adjacent beveled gears 66. Said 'beve'ledh gears are provided with elongated hubs 68,

against the end of which one of the arms 67 bears, andshortsleeves 69 are interposed be- "tween the gears and the other arms, whereby movement -of.said bearings and their :arms on the shaft 56 imparts a positive movement to the gear-pinions 66 on the shaft '64. The said parts are adjusted towardand from each other for the purpose stated by means of a rotati-ve right and left handed screw-threaded shaft 71, Figs. 1, 4, and 9, located transversely above and parallel with the supporting-shaft 56 and mounted at its ends in the upperends o'i'the standards 57, 'Figs. 27 and '8. Said bearings 55 are provided withapertured screw-threaded lugs 72, rising therefrom,

through which extends the screw-threaded shaft 71, whereby rotation of said screwshaft acts, through the lugs '7 2, to move the bearings 55 toward and from each other on 'thesupportingshaft 56 and also the drivingpinions 66 of the shafts 64 in unison therewith. It is desirable also that the upper stripper-rollers 31 be adjusted on their shaft 32 toward and away from each other to correspond with the adjustment of the bagholders. For this purpose arms extend rearwardly from the laterally-movable bearings 55, as shown in Fig. 1, and are provided at their rear ends with. nuts 76, which are mounted on a rotative right-and-left screw-threaded shaft 77, located in front of and parallel with the stripper-rollers, and said arms 75 extend beyond the screw-shaft 77 and enter annular grooves 78, formed in extensions or hubs of the short upper stripper-rollers 81. The rotative screw-shaft 77 is mounted at its ends in bearing-standards 79 on the side rails 15 of the machine. shafts 71 and 77 are provided at their corresponding ends with

pulleys

80 and 81, herein shown as having the form of sprocketpulleys, which are connected by a sprocketbelt 82, and the shaft 71 is provided with a crank 83, by which simultaneous rotary motion is imparted to said shafts to effect simultaneous lateral adjustment of the holders and the stripper-rollers. Y

Referring now to the mechanism for imend with the time-shaft 23.

shown, said time-shaft 23 is provided with a tive sleeve :85, fixed 'fromendwise movement between said stan'dardand aplate 86, that is attached to the shaft by means of :a central screw-bolt 87, extending through the .plate and having-axial screw-threaded engagement with the shaft, Fig. 8. The sleeveis provided on its inner end with :a gear-wheel :88, that meshes with a gear-pinion 89., fixed to the adjacent end of the holder-actuating shaft 64, Figs. 1, 7, :and'9. Said-sleeve 85 is :also provided just outside of the gear-wheel 88 with a plurality of ratchetsteeth 90, as best shown in Fig. 6, which are adapted for engagement :by a .spningepressed pawl 91, carried ibyaan 'armi92, rigi dwiith and extending radially from a collar '93, zrotatively mounted onsaidsleeve 85, Fig. 8. The-said collar 93 is provided with a second rigid arm 94i, that is pivoted at its outer ends to an upright link95, Figs. 1 and .9, near the npperiend of the latter, by means :of a pivot-pin 96, and said link is operatively connected at its lower As herein suitable cam 100, which operates upon a vre arwardly -extendi-ng vertical-1y swinging arm 97 of a horizontal rock-shaft .98, mounted transversely in the machine-frame, :and the said rock-shaft is provided with an inwardly-extendingarm .99, which is hinged to the lower end of the link 95. Preferably the rear end of the rock-shaft arm 97 is provided with an antifriction-roller 101,which rides on the irregular periphery of the foam 100. The rock-shaft and its arms are placed under the influence of a spring 102, acting normally to hold the inner arm depressed andagainst the force of which spring said inner arm is raised by the cam 100. Said spring, as herein shown, has the form of a spiral expansivelyacting spring and surrounds a vertical rod 103, that is pivoted at its lower end to the inner rock-shaft arm 99 and has guiding engagement at its upper end with the inner :end of an arm 104., extending forwardly from a ,horizontal rock-shaft 105, that extends The transversely across the machine and is mounted in suitable bearings The spring 102 is compressed between the said arm 10% and a shoulder 1 06 at the lower end of said rod. As herein shown, .the spring bears at its upper end against a sleeve 107, and said sleeve is provided with outwardlyextending pins 108, against which the bifurcated members of the arm 104 hear. The tension of the spring is adapted to be adjused, by means of a lever or arm 10 9, onthe side of the machine remote from the spring, which is fixed to the rock-shaft 105 and 0perates in connection with a suitable rack 1 10, fixed to the adjacent side of the machine, as clearly shown in Fig. 10.

With this construction it will be observed that when the inner end of the rock-shaft arm 99 is raised through the action of the cam 100 and against the action of the spring 102 the collar 93, operatively connected with the upper end of the link 95, is rocked on its bearings and acts, through the arm 92, to carry the pawl 91 backwardly over the ratchet-teeth on the sleeve 85, and when said inner end of the rock-shaft arm 99 is depressed the link is reciprocated downwardly and rocks the collar 93 in the reverse direction, thereby carrying the pawl 91 against one of the ratchet-teeth 90 and rocking said sleeve 95 a predetermined angular distance. This action of the pawl-andratchet mechanism operates to turn the sleeve 85 and its gear-wheel 88 and, through the shafts 64 and 54 and their intermeshing gears, to turn the holders the desired angular distance to present a distended bag to the turning-arms.

In order to prevent overthrow of the holders or to prevent them being turned too far in each step of their movement at a time when no bags are applied thereto, a stop mechanism is provided which operates to arrest said holders in their proper positions, and thereby avoid the liability of the arms of the holder stopping at such time in the paths of the turning-arms, with a result of an interference between such parts. Said stop mechanism may be conveniently made as follows:

'112 designates a star-wheel which is fixed to the outer end of the sleeve 85, as best shown in Fig. 8, it being herein shown as hav ing screwthreaded engagement with the reduced outer end of said sleeve. The teeth or arms 113 of said star-wheel are straight or abrupt on the sides thereof which face in thedirection which the wheel and sleeve are rotated to drive the bag-holders. The link 95 is formed at its upper end to provide an upwardly and inwardly directed extension 11 1, which carries at its forward end a stop-pin 115. The said arm 114 and the stop-pin 115 are so disposed that when the link is in its lowermost position the stop-pin is located with its inner end in the path of the arms of the star-wheel and in position to engage the straight or abrupt faces thereof and stop or arrest the said wheel and the parts which rotate therewith, including the bag-holders. When the reciprocating link 95 is raised upwardly by the action of the cam for the purpose of carrying the actuating-pawl 91 backwardly over the ratchet-teeth 90 to engage another ratcl. e.-tooth for the purpose of rotating the holders during the next descent of the link, the stop-pin is raised upwardly out of the path or the teeth of said starwheel, as indicated in F ig. 9, in a manner to permit the gear 88 and the parts operatively connected therewith, including the holders, to freely turn in the beginning of the descending movement of the link 95. The parts are so disposedthat when the bagholders have been rotated the required angular distance through the mechanism described the stoppin will be brought in position to engage one of the arms of the star wheel, and thereby arrest the holders and the actuating parts from overthrow. Pre erably the contact between the stop-pin 115 and the flat faces of the arms of the star-wheel is a buffing contact. Such bufling contact may be provided by facing the fiat sides of the star-wheel arms with a cushioning material 116, or the pin 115 may be associated with a spring to give a bu'l'ling or cushioning effect thereto when it is brought into contact with the star-wheel.

I have found that when operating the machine rapidly, and especially when operating on bags made or thin material, it sometimes occurs that the frictional contact between the mouths of the bags and the holder-arms is so great as to prevent the bags being readily stripped off of the arms, with a result that the bottoms of the bags are often punctured by the forward ends of the turning-arms. In order to avoid this result, I provide means for relieving the tension on the mouth of the distended bag at or before the time the arms strike the bottom of the bag, thereby reducing the friction between the bag and holderarms and facilitating the stripping of the bag from the holder-arms. A convenient mechanism for effecting this result is shown in the drawings, which operates in connection with the bag-holder-actuating cam 100. For this purpose I have provided said cam with an adjustable peripheral projection in contact with which the roller 101 of the rock-shaft arm 97 rolls, and said projection is so located on the cam as to swing the rear end of the arm 97 slightly downwardly and the forward end of the arm 99 upwardly, thereby operating through the link 95 to slightly retire the pawl 91 from its engaged ratchet-tooth 90. The tension of the bag on the arms of the holders engaged thereby acts to pull said arms toward each other, thereby reducing the friction between the mouth of the bag and the arms in such manner that said bag will slip readily off the arms when the turning-arms strike the bottom of the bag. Such release of the tension occurs just before the ends of the arms strike the bottom of the bag, and the parts are immediately restored as soon as the bag is stripped off the holders. The supplemental cam projection herein shown is formed on a fiat plate or bar 120, Figs. 9 and 11, which is attached to one fiat side of the cam by means of bolts 121, and said plate extends at one end beyond the periphery of the cam and is provided with a laterally-projecting part 122, that lies over the periphery of the cam, as best shown in l ig..11. '1 he said tension-releasing device is made adjustable, so as to be adapted to bags or various lengths, it being obvious that the release or such tension will be required later when operating on longer bags than when operating on shorter bags. For this purpose the bolts 121, which. hold the plate or bar 120 in position, extend through curved slots 123 in the cam, thereby permitting aiigular adjustment or the pro jection 122 of said plate ror the purpose described.

1 claim as my invention* 1. In a bag-turning machine, a bag-holder constructed to exert tension on the mouth of the bag while the bag is being turned, and means for releasing the tension on the dis tended bag before it is stripped from the holder to facilitate its removal.

2. In a bag-turning machine, the combination with the bag-holderconstructed to exert tension on the mouth of the bag while the bag is being turned and the bag turning arms, of means operating to release the ten sion on the distended bag just before it is stripped from the holder by said bag-turning arms.

3. In a bag-turning machine, the combination with bag-holding arms which are spread to distend the mouth of the bag placed there over, of means permitting said bag-holding arms to yield toward each other preparatory to stripping the bag therefrom.

4. In a bag-turning machine, the combination with a bag-holder comprising two arms over which the mouth of the bag is placed, means for spreading the arms to stretch the mouth of the bag, and reciprocating bagturning arms, of means operating to release the tension on the bag before it is stripped from the holder by said bag-turning arms.

5. In a bag-turning machine, the combination with a bag-holder comprising two arms over Which the mouth of the bag is placed, means for spreading the arms apart to stretch the mouth of the bag, and adjustable means for releasing tension 011 the bag before it is stripped from the arms by the bag-tur11ing arms, the adjustment of said tension-releasing device adapting the machine to bags of diiferent lengths.

6. In a bag-turning machine, the combination with the bag-turning arms, and a bagholder comprising parts which are separated to distend the mouth of a bag placed thereover, of a cam for operating the bag-holding arms, and means for releasing the tension on the distended mouth of the bag preparatory to stripping the bag from said bag-holding arms.

7. In a bag-turning machine, the combination with the bag-turning arms, and a bagholder comprising parts which are separated to distend the mouth of a bag placed there over, of a cam for operating the bag-holding arms, and a supplemental cam projection carried by said cam operating to release the tension on the bag-mouth preparatory to stripping the bag from said holder-arms.

8. in a bag-turning machine, the combination with the bag-turning arms-and a bagholder comprising parts which are separated to distend the mouth of a bag placed there over, oi a cam for operating the bag-holding arms, and an adjustable supplemental cam projection carried by said cam operating to release the tension 011 the bag-mouth preparatory to stripping the bag from said holderarms. 7

9. In a bag-turning machine, a bag-holder embracing bag-holding arms movable away from each other to distend the mouth of the bag, of means for operating the bag-holder arms embracing a cam and a swinging arm operating on the cam-surface thereof, and a supplemental cam-surface that is adjustable on the main camsurface for releasing the tension on the bag.

10. In a bag-turning machine, a bag-holder comprising two rotative parts having arms which operate in pairs, means for intermittently turning said parts comprising an endwise-reciprocating link or bar, and a pawland-ratchet mechanism operatively connecting said rotative parts of the bag-holder and said link or bar.

1 1. In a bag-turning machine, a bag-holder comprising two rotative parts having bagengaging arms operating in pairs, means for intermittently rotating said parts comprising an endwise-reciproeating link or bar, a pawland-ratchet mechanism operatively connecting said link or bar and the rotative parts of the holder and a cam for reciprocating said link or bar.

- 12. In a bag-turning machine, abag-holder comprising two rotative parts having bagengaging arms which operate in pairs, shafts fixed to said parts, and means for imparting intermittent rotation to said shafts comprising a shaft extending transversely across the machine, intermeshing gears on the transverse shaft and the holder-shafts, a gear-pinion on the transverse shaft, a gear-wheel meshing with said pinion, and a pawlandratchet mechanism operating to turn said gear-wheel.

13. In a bag-turning machine, a bagholder comprising two rotative parts having bagengaging arms which operate in airs, shafts fixed to said rotativc parts and means for imparting intermittent rotation to said shafts comprising a shaft extending transversely across the machine, intermeshing gears on the transverse shaft and the holder-shafts, a gear-pinion on the transverse shaft, a gear- IIO wheel meshing with said pinion, a rotative sleeve lixed to said gear-wheel, ratchet-teeth on said sleeve, a collar rocking on said sleeve and carrying a pawl engaging said teeth, and means for rocking the collar on said sleeve.

14:. In a bag-turning machine, a bag-holder comprising two rotative parts having bagengaging arms which operate in pairs, shalts fixed to said rotative parts and means for imparting intermittent rotation to said shal ts comprising a shaft extending transversely across the machine, intermeshing gears on the transverse shalt and the holder-shafts, a gear-pinion on the transverse shaft, a gearwheel meshing with said pinion, a rotative sleeve fixed to said gear-wheel, ratchet-teeth on said sleeve, a collar rocking on said sleeve and carrying a pawl engaging said teeth, and means for rocking the collar on said sleeve, comprising a reciprocating link connected with said collar, and a cam operating to impart endwise reciprocation to said link.

15. In a bag-turning machine, the combination with rotative bag-holders, or means lor imparting intermittent rotation to said holders comprising a rotative sleeve geared to the holders, a pawl-and-ratchet mechanism operating to turn said sleeve, and a stop on said sleeve for arresting the overthrow of said holders.

16. In a bag-turning machine, the combination with rotative bag-holders carrying bag-engaging arms operating in pairs, 01' means for imparting intermittent rotation to the holders comprising a rotative sleeve geared to the holders, a ratchet on said sleeve, an actuating-link carrying a pawl engaging said ratchet and a stop for arresting the rotation of said sleeve embracing cooperative parts on said link and sleeve.

17. In a bag-turning machine, the combination with rotative bag-holders carrying bag-engaging arms operating in pairs, of means for imparting intermittent rotation to the holders comprising a rotative sleeve geared to said holders, a ratchet on said sleeve, an actuating-link carrying a pawl engaging said ratchet, and a stop for arresting the rotation of said sleeve embracing a starwheel rotating with said sleeve and a stop pin carried by said link.

18. In a bag-turning machine, the combination with rotative bag-holders carrying bag-engaging arms which operate in pairs, of means for intermittently rotating saidbagholders comprising a rotative sleeve geared to the holders, a ratchet on said sleeve, a collar rocking on the sleeve and carrying a pawl which engages said ratchet, a reciprocating link pivoted to said collar for rocking the same and a stop for arresting the overthrow of the holders embracing a stop-pin carried by said link.

19. In a bag-turning machine, the combination with rotative bag-holders carrying g bag-engaging arms which operate in pairs, of l means for intermittently rotating said holders comprising a rotating sleeve geared to said holders, a ratchet carried by said sleeve, a collar rocking on said sleeve and carrying a pawl which cooperates with said ratchet, a reciprocating link for rocking said sleeve, a lever pivoted to the lower end of said link, a cam operating against the other end of said lever, and a spring applied to said lever and operating thereon in opposition to the cam.

20. In a bag-turning machine, the combination with rotary bag-holders, of means for intermittently rotating said holders comprising a rotative sleeve geared to the holders, a 1 ratchet carried by the sleeve, a collar rocking on the sleeve and carrying a pawl which cooperates with said ratchet, a reciprocating rocating said link comprising a rotative cam, a lever pivoted to the lower end of said link and operating at its other end against the cam, a spring applied to said lever and operating thereon in opposition to the cam, and means for adjusting the tension of said spring.

21. In a bag-turning machine, the combination with rotary bag-holders, of means for intermittently rotating said holders comprising a rotative sleeve geared to the holders, a ratchet carried by the sleeve, a collar rocking on the sleeve and carrying a pawl which colink for rocking said sleeve, means for reciprocating said link comprising a rotative cam, and a lever pivoted to the lower end of said link and operating at its other end against the cam, a spring applied to said lever and operating thereon in opposition to the cam, and means for adjusting the tension of said spring, comprising a rock-shaft provided with an arm arranged to operate on said spring, an adjusting-arm fixed to said rock-shaft and means for locking said adjusting-arm in dif- 'l'erent positions of adjustment.

22. In a bag-turning machine, the combination with rotative bag-holders carrying bag-engaging arms operating in pairs, of means for imparting intermittent rotation to the holders, comprising a rotative sleeve geared to said holders, a ratchet on said sleeve, an actuating-link operating a pawl the pawl away from the ratchet to release the tension of the bag supported by said holderarms.

23. In a bag-turning machine, the combination with two rotative bag-holders carrying bag-engaging arms operating in pairs, shafts lixed to and rotating the bagholders, a shaft extending transversely across the machine and geared to said bag-holder shafts, means for imparting intermittent rotation to said shafts and the bag-holders, and means for moving the bag-holders and the driving- 1 gears thereof toward and away from each link for rocking said sleeve, means for recip-.

operates with said ratchet, a reciprocating engaging said ratchet, and means for backing- IIS other for adjusting the machine to bags of varying widths.

24. In a bag-turning machine, the combination with two rotative bag-holders carrying bag-engaging arms operating in pairs, shafts fixed to and rotating said holders, bearings in which said shafts are mounted, a shaft extending transversely across the machine, intermeshing gears on said transverse and holder shafts, the gears of the transverse shaft being movable endwise of said shaft, means for imparting intermittent rotation to the said transverse shaft and therethrough to the holders, interlocking connections between said bearings for the holder-shafts and said gears of the transverse shaft, and means for moving said bearings toward and from shaft extending transversely across the machine, intermeshing gears on said transverse and holder shafts, the gears of the transverse shaft being movable endwise of the shaft, means for imparting intermittent rotation to the said transverse shaft and therethrough to the holders, interlocking connections between said bearings for the holder-shafts and said gears of the transverse shaft, and means for moving said bearings toward and from each other, carrying therewith the said holders, the holder-shafts and the intermeshing gears of the holder-shafts and transverse shaft, comprising a right and left hand screwthreaded shaft, the said bearings for the holder shafts being provided with corresponding screw-threaded apertures through which said screw-threaded shaft extends.

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two witnesses, this 5th day of January, A. D. 1906.

SAMUEL T. LOOKWOOD.

Witnesses:

ERNEST H. LOOKWOOD, CAROLINE SCHERTZ.