US2252028A - Paper feed - Google Patents

Description

Aug. 12, 1941. c. H. PETSKEYES ETAL 2,252,023

' PAPER FEED Filed Feb. 27, 1939 2 Sheets-Sheet l Charles A. Pezsfbe as /5 and Israel 6 fiellm IN VENTORS f/mk/ ATTORNEY.

Aug. 12, 1941.

c. H. PETSKEYES ETAL v PAPER FEED 2 Sheets-Sheet 2' Filed Feb. 27. 1939 deye M fsraeLC 661117? 72/ INVENTORS- Charles 11 Pezfsfi BY f/lfl ATTORNEY.

Patented Aug. 12, 1941 PAPER FEED Charles H. Petskeyes, Davenport, Iowa, and Israel C. Gcllman, Rock Island, 111., assignors to Gellman Manufacturing Company, Rock Island, 111., a corporation of Illinois Application February 27, 1939, Serial No. 258,672 I 8 Claims.

The principal object of this invention is the provision of improved paper feeding and measur-'- ing means for use in wrapping machines.

Viewed from another aspect, the invention has among its important objects the provision of adjustable means, cooperably driven with certain Wrapping mechanism in a wrapping machine, for

Fig. is a diagram illustrating the timing and carry-over feature;

Fig. 6 is a fragmentary sectional elevational view as seen from line 6-6 in Fig. 2.

Referring to Fig. 3, a preferred arrangement includes asource of supply of paper webbing in the form of a roll of wrapping paper II! rotatably supported on a spindle II removably seated inslots l2 in cradle arms l3 projecting from opposite frame members M of the main frame structure.

The web of paper I5 is fed up over a feeding roller 16 journaled' in opposite projections ll (Fig. 1 also) on frame members l4 above the supply roll, and as shown in Fig. 2, one end 20 of the feed roller is keyed as at 2| to the spindle 22 of a driven ratchet device having an end plate 23 rigid with the spindle and on which is mounted a pawl 24 urged by spring means 25 into driving engagement with ratchet teeth 26a on a driven gear 26 which floats on a stud 21 integral with the spindle 22. When the gear 26 is rotated in one direction, the pawl 24 catches and rotates the feed roller l6 (Fig. 6).

Mounted at intervals across a shaft 30 (Figs. 2 and 3) are a plurality of friction presser rollers 3| which are pressed against the paper webbing on roller I6 by virtue of the fact that the shaft 30 is journaled at its opposite ends in eccentric arms 32 pivoted as at 33 on the frame and each normally urged'by eccentric springs 34 toward the feed roller.

The presser-roller shaft 30 is driven cooperthe arm 32 back toward the feed roller.

ably with the feed roller through the agency of a driven pinion 40 (Figs. 1 and 2) thereon which meshes with a driving pinion 4i rigid on the ratchet spindle 22.

Means for moving and holding the presser roller out of pressing engagement with the feed roller-includes the provision of a hand lever pivoted as at 46 on the frame and having a cam part 41 arranged to ride into and out of an eccentric notch 48 on one of the eccentric arms 32. Thus, when the lever 45 is turned clockwise in Fig. 1, the cam portion rides into the notch on the eccentric arm and pivots the latter about the point 33 and moves the rollers 3| away from-the feed roller. Movement of the lever 45 in the opposite direction back to the position of Fig. 1 permits the spring 34 to urge This presser operating and control means 32-34-45 is duplicated on opposite sides of the machine, for convenience.

By cooperation of the feed and presser rollers,

as aforesaid, the webbing i5 is fed over a stationary horizontal knife member 5|] (Fig. 3) beneath a guide means or apron 5!, which prevents the paper from curling up or back when it is cut, the paper continuing across an opening which is (at times) bridged by the lower level 52 of an elevator mounted atop a vertically reciprocable elevator post 53 until the end l5a of the paper webbing lies on a holding table 54 at the opposite side of the elevator opening.

When the elevator starts down from the fully raised position shown in Fig. 3, a knife bail 58, pivoted on the frame as at 59 is permitted to drop by its own weight (having been previously raised by the rising elevator into the position' of Fig. 3) and a movable knife or shear 60 pivotally mounted by hinge means 6| thereon, shea-rs the webbing IS in cooperation with the stationary shear 50. The knife bail structure is described and claimed in our copending U. S. application, Serial No. 258,676.

Means for grasping and holding the sheared sheet of wrapping material includes a holding bail 62 extended crosswise of the sheet above the elevator and holding table 54, the bail being mounted in a, pair of arms 63 pivoted as at 64 on a tail 65 of the knife bail. This mounting, together with the provision of quick-action operating arms 66, pivotally attached as at 61 to each of the bail arms 63 and each coacting with spring means 68 on the shanks of thumb screws 69 severally attached to the bail arms 63, effects a snapping of the holding bail 62 toward the table '54, to and from the position of Fig. 3 as a result of the up and down movement of the elevator.

When the elevator starts down, the quickaction arrangement causes the holding bail 82 to be quickly dropped down against the end l5a of the sheet of paper (the latter being severed from the main web at substantially the same time by downward movement of the knife ball as aforesaid) with the result that one end l5a of the severed sheet is clamped against the holding table 54. i

As the elevator continues downward, the free end of the cut sheet lowers until the sheet is hanging nearly vertical from table 54. At this time, by means not shown herein, but described and claimed in our copending U. S. application,

Serial No. 258,674, an article such as a loaf of.

bread will be moved horizontally against the hanging sheet and onto the upper level 55 of the elevator, so that the loaf is initially and partially wrapped- As a result of movement of .the elevator into raised position (Fig. 3), certain intermediate wrapping operations are effected through engagement of the protruding parts of the sheet with members such as the arm 18, and

through the agency of other wrapping means not all shown herein.

For purposes of understanding the present invention, it is sufficient to point out that when the loaf reaches fully elevated position, it is substantiallyv wrapped save for certain end folds which are effected by moving the loaf sidewise between opposite terminal fold plates ll so as to cause the incomplete end folds or tails to ride into arcuate tracks 12 for the final folding operation.

Movement of the elevated loaf into the terminal fold means is accomplished by a pair of reciprocal transfer arms 13 depending from sleeve brackets 74 sliding on horizontal rails 15 above the elevated loaf. The transfer arms are shifted from normal position (Fig. 3) against the side of the loaf to move the latter in between the terminal fold plates H, at which time the elevator may start down.

Mechanism for actuating the transfer means '|314 in timed relation to the movement of the elevator and other wrapping instrumentalities of the machine, includes offset drive or crank arms 15 (Fig. 1only one being seen) mounted for oscillation at their ends 18 on a cross shaft 11 rigid therewith and joumaled in the main frame. The drive arms oscillate in the direction of reciprocation of the transfer arms 13, but at an opposite end of the machine from the latter, connecting rods 18, each attached at one of their ends to the offset parts 19 of one of the drive arms, and at their respective opposite ends 88 to one of the sleeve brackets I4, providing a driving connection between crank arms 15 and the transfer fingers. Thus, when the crank arms are oscillated, the transfer arms are reciprocated.

One of the crank arms 15 has a cam follower which rides in the cam groove or track 8| of a rotating cam 82 on a shaft 83 which has driving connection (Fig. 4) with a central drive system or power plant, and which moves the crank 15 back and forth in timed relation to the movement of the elevator and associated wrapping mechanism.

The paper measuring device is arranged for timed coaction with the other wrapping mechanism through an adjustable driving connection with the transfer operating crank means. To this end, one of the drive cranks 15 1 ,5 a forthe form of a sliding block 81 threaded on an adjusting spindle or screw 88 joumaled in the guideway and arranged to be rotated by a hand crank 89 for the purpose of causing the block or rider 81 to move back and forth in the guideway.

Projecting from the adjustable fulcrum block is a stud 98 to which is pivotally attached one end part 9| of a drive rod 92. The opposite end of the drive rod is provided with a rack of teeth 93 and is slidably mounted for rocking reciprocation on rollers 94 secured by pins 95 to a rocking plate 98 which is pivoted on a stud bolt 91 in the frame and which in turn mounts a gear 98 meshing with the ratchet gear 26. The drive rod is fitted in behind the gear 98 with its rack of teeth meshed with a reduced inner gear toothing 99 forming a part of gear 98.

By turning the adjusting crank 89, the stud or pivot member 88 is moved to any desired position along the guideway on the drive crank to position an ndex on the drive rod connection 9| opposite desired number indication along the guide member, these latter indications being calibrated to indicate the number of inches of paper to be fed. In this way the adjustable lever, pivot, or fulcrum connection between the crank 15 and the drive rod 92 is changed to vary the stroke thereof with a consequent variation in the rotative movement of gear 98.

When the drive rod 92 moves in one direction (right, Fig. 1) ratchet gear 26 slips past the pawl so that the paper feed roller is not turned, but when the drive rod moves in the opposite direction, the pawl 24 takes hold and the feed roller I8 is turned to advance a portion of the webhow much, depending upon the setting of the fulcrum block relative to the indicia on its guideway. The advance or feeding of the web occurs at a time when the transfer fingers are moving the nearly wrapped loaf in between the terminal wrapping plates.

The form of the cam 82 determines the relative rate and period of operation of the drive crank and drive rod with respect to the other wrapping mechanisms, and the elevator waits in raised position while the transfer arms remove the bread therefrom and while a new portion of webbing is fed across the lower level of the elevator.

An important feature of the timing is the arrangement of the cam 82 to give the drive rod 92 a slight but definite forward (left, Fig. 1) pull at the moment the elevator moves into fully raised position. The advantage of this resides in the fact that the machine is arranged and constructed to complete each wrapping cycle or oper ation when the elevator moves into raised position. This is accomplished through a special clutch connection with the power plant for the machine, the arrangement being such that there is always a slight carry-over of the cam 82 from and due to the congealing of wax, generally, when the machine is allowed to stand idle for any appreciable period. Thus, if the machine is shut off, the waxed paper will be given a slight advancing movement to loosen it, and there will be no danger of sticking, such sticking being highly objectionable because it results in bunching of the paper and jamming of the machine.

This terminal kick or momentary advance of the web at the end of each wrapping cycle is accomplished by the mechanism shown in Fig. 4 wherein the cam shaft; 83 is shown to be connected through a special clutch I I with a sprocket III floating on shaft 83 and driven by a motor 2 constituting a central power plant or drive means for the machine. At this juncture, it may be observed that the elevator 53-is cooperably driven with the actuating means for the proper feed through the agency of a second cam H3 on shaft 83 and crank means lll-II5. The cam 82 and associated crank I5, adjustable pivot or fulcrum means B590--92, constitute a cyclically operable actuating mechanism for the paper feed, and this actuating means coacts M8 (see Fig. 5) which is normally urged by a spring H9 into driving engagement with the ratchet.- A manually controlled lever I is connected with a pivoted release and stop I2! arranged in the path of the pawl so as to lift the latter out of clutching engagement with the ratchet once per revolution of the clutch assembly. In this sense, the clutch is cyclically operable, and upon each cycle of operation thereof the wrapping mechanism is driven through one complete wrapping cycle or operation.

The cam 82 is so arranged in its evolution that for every complete revolution of the shaft 83, corresponding to one complete wrapping cycle, the cam 82 will travel through one complete cycle and a small part of the next cycle. As a result, when a complete wrapping operation is finished, the elevator 52-55 rests in raised position, while the drive rod 92 is moved slightly to advance the free end of the paper enough to prevent its sticking or becoming fixed, so that the danger of jamming is obviated-especially where the machine lies idle for any length of time between wrapping operations.

The foregoing phase relationship between the cyclic operations of the wrapping mechanism and paper feed is diagrammatically illustrated in Fig. 5 wherein the parts are identified in their respective positions at the completion of one moved slightly past (downward) the lowest nose I26 on cam 82, movement between the nose I26 and the point I2I corresponding to paper feeding movement of the drive member or stroke arm 92.

The objects and advantages of the invention 4 may be realized in. other forms of construction, arrangement and modes of operation of the parts specifically described herein for purposes of illustrating a preferred embodiment, and the appended claims therefore are intended to include all equivalent arrangements fairly coming withdrive means to effect one complete wrapping operation of said wrapping mechanism, said cyclically operable actuating mechanism being arranged and constructed to complete one cycle of operation and a part of another cycle during each operating cycle of said wrapping mechanism following operation of the clutch means as aforesaid, whereby said webbing may be partly advanced at the completion of each wrapping cycle to prevent the severed portion of said webbing from becoming fixed following each severing operation.

2. In a wrapping machine, a source of driving power, paper feeding means arranged to feed measured amounts of wrapping paper relative to wrapping mechanism in said machine, cyclically operable drive means for actuating said feeding means, and cyclically operable clutch mechanism arranged for operation to connectsaid cyclically operable drive means with said source of driving power, said cyclically operable drive means being arranged and constructed to provide a carryover whereby said cyclically operable drive means will be driven a predetermined amount after completion of each cycle of operation thereof upon each operation of said clutch mechanism.

3. In a wrapping machine, wrapper feed means arranged for actuation to feed measured lengths of wrapper, cyclically operable drive means coacting with said feed means to actuate the latter so as to feed one of said lengths of wrapper for each cycle of operation thereof, and cyclically operable clutch means operatively connecting said drive means with a source of driving power,

.said clutch means being arranged and constructed to be operated to initiate a cycle of operation of said drive means, and the latter being arranged in such manner that upon each cycle of operation thereof, said cyclically operable drive means will be driven through one cycle and a predetermined fraction of the next cycle, whereby said wrapper material will be advanced in feeding movement following each actuation of said feed means upon operation of said clutch means.

4. In a wrapping machine, in combination, means for feeding a waxed wrapper from a web and severing the same, and mechanism including instrumentalities for wrapping an article in said wrapper and including coacting power drive and clutch means arranged for actuation to complete one cycle of operation to feed and sever a wrapper and wrap an article as aforesaid, said drive and clutch means being further arranged and constructed to advance said web in feeding movement a certain amount at the conclusion of each said cycle to assure that said web shall'not stick as a result of the severing operation.

5. In a wrapping machine, in combination, wrapping mechanism arranged for actuation to effect a series of complete wrappmg operations and coacting with web feeding and severing means to advance and sever a waxed wrapper prior to each wrapping operation, power-driven means for energimng said mechanism and coacting means, and a clutch drivingly interconnecting said power-driven means and mechanism and arranged for operation to eifect energization of said mechanism for one complete wrapping operation as aforesaid and a fraction of another wrapp operation sufficient to advance said web before disconnecting said mechanism from said drive means whereby to dislodge said web to avoid jamming the machine by sticking of the web as a result of severing the same.

6. In a wrapping machine, in combination, a

rotatable drive shaft, power means for driving said shaft, a clutch arranged for operation ;to interconnect said shaft and power means for the duration of a complete revolution of the latter by the former and a fraction of another revolution and thereafter to automatically disconnect said shaft from said power means, wrapping mechanism, means energized by said shaft forvactuating said wrapping mechanism and arranged to effect a complete wrapping operation for each revolution of the shaft, means for feeding webbing for wrapping purposes relative to said wrapping mechanism and severing a predetermined length of the webbing to provide a wrapper for each complete wrapping operation as aforesaid, said severing means being actuated prior to or not later than the completion of each revolution of said shaft so that said webbing will be advanced by the additional revolution of said shaft before disconnection of the latter by said clutch from said power means.

7. In a web feeding and severing mechanism, in combination, cyclically operable means for feeding predetermined lengths of webbing relative to severing means, a source of driving power, clutch means operable to interconnect said cyclically operable means and said source of power to drive the former through one complete operating cycle and a fraction of the next cycle and thereafter disconnect said cyclically operable means whereby to advance more than said predetermined length of webbing, and severing means driven cooperably with said cyclically operable means to sever said web prior to the disconnection of the cyclically operable means by the clutch means as aforesaid whereby a portion of said webbing less than said predetermined length will be advanced following each severing operation to dislodge said webbing in the event the same sticks or is otherwise arrested, whereby jamming of the machine may be prevented.

8. In a sheet feeding and severing machine, means for feeding waxed sheeting with respect to severing means, a power source, clutch means constructed to be set for operation to interconnect said first-mentioned feeding means with said power means for operation to feed a predetermined length of sheeting and thereafter automatically disconnect said feeding means, and severing mechanism driven cooperably with said feeding means through the agency of said clutch means for actuation once during each feeding operation to sever said sheeting in a length less than said predetermined length priorto the disconnection of said feeding means whereby an additional length of sheeting will be fed following each severing operation to loosen said sheeting in the event the same sticks as a result of the severing thereof, whereby to prevent jamming of the machine.

CHARLES H. PETSKEYES. ISRAEL C. GELLM'AN.

Images