US2229287A - Bread wrapping machine - Google Patents

Description

l. C. GELLMAN BREAD WRAPPING MAGHINE Jan. 21, 1941.

Original Filed March 8. 1937 2 Sheets-Sheet 1 NNN /'ael I 'eZl/zan/ l INVENTOR.I

BY mf /975 ATTORNEY.

Jam 21, 1941- l. c. GELLMAN BREAD WRAPPING MACHINE Original Filed March 8, 1937 2 Sheets-Sheet 2 WMM @GNN www Israel v. eZl//zan/ Y INVENTOR.

1 BY l H15 ATTORNEY.

MN Q Y wlwl I u gwn@ .Q lfwr 4 .NVV/VMM- 1 mmm .Q QN www A r mw www mm Patented Jan. 2.1, 1941 PATENT OFFICE 2,229,281' y BREAD WRAPPING MACHINE Israel C. Gellman, Rock Island, lll., assignor to Gellman Manufacturing Company, Rock Island, Ill., a'corporation of Illinois Original application March 8, 1937, Serial No.

Divided and this application October 29, 1937, Serial No. 171,755

Claims.

This invention relatesto paper and web feeding mechanism for use with bread Wrapping and similar machines, and is a division of my pending United States application Serial No. 129,561, filed 5 March 8, 1937.

' It is an object of .the invention to provide an automatic paper feed for use with bread wrapping machines of the type having a central drive system and wrapping mechanism movable in 0 timed strokes and including a paper shear operable periodically therewith.

It is a further object -to provide a simple mechanism for feeding paper in predetermined lengths,

, and adapted for connection with the aforesaid l" central'drive system. l

It is another object to provide a simple adjusting mechanism for determining .the length of web paid out at each feeding operation.'

Yet another object is the provision of automatic paper feeding means including means for supporting a plurality of web rolls, roller means for unwinding the web from the rolls, a rocker gear having adjustable driving connection with the central drive system, and unidirectional `clutch means interconnecting the rocker gear and roller or feeding means.

Yet another object is a cutting means for severing the web in timed relation to the feeding movement and the movement of the wrapping carriage, the invention providing particularly a rocking knife which is engaged by a reciprocable wrapping carriage, at a certain stage in the movement of the latter, to cause the knife to shear a web of wrapping paper.

05 Other objects and novel aspects of the invention both as to matters of construction and operation, will become evident from 4the following description taken in View of .the drawings, in which: l

Fig. 1 is a fragmentary side elevation of a wrapping machine and the automatic feed means;

Fig. 2 is a fragmentary top plan view, partly in section, of the paper feed roller and-clutch drive means therefor;

Fig. 3 is an enlarged detail of the segmental rocker gear and ratchet means for the feed roller.

Fig. 4 is a fragmentary vertical'section through the machine along lines 4-4 of Fig. 2 looking at the opposite side of the frame member shown in Fig. l; i

Fig. 5 is a cross section through the adjustable knife bearer support Itaken along lines 5-5 of Fie- 4; l Fig. 6 is a fragmentary top plan view similar (Cl. S33-2) to Fig. 2 but taken on the opposite side of the machine from the latter and looking down along line 6-6 of Fig. 4; and

Fig. 7 is a fragmentary cross sectional detail through the knife structure adjacent the knife -blades as seen along lines 1--1 of Fig. 6.

As viewed in Fig. 1, the wrapping machine with which the present feed means is especially adapted to be used, includes a main frame 24, a central drive shaft 32 -driven by motor means 3l. 10

Mounted on frame 24 is a sprocket wheel 3|8 driven by a chain 320 from a sprocket gear 322 on shaft 32, and the driven sprocket 3l8 has a drive arm 3 I 4 provided with a radial slot 3I'l provided at its outer end with a radially movable 15 adjusting bolt means 3|1, the purpose of which will later appear. .This part'of the mechanism constitutes the driving connection between the central power system and the feeding means.

' Supported at an end ofthe main frame 424 are 20 a pair of upright brackets 200 mounted in spaced relation Iand each having opposite cradle bearings 203 into which seat paper stock or web rolls 20|. Lower down on the brackets is an idling cross roller 205 over whichv the `twin paper webs 204 20 pass down between the feed means onto an apro 2|2.

This feedmeans includes presser rollers 201 (Figs. 2, 4 and 6) fitted into edgewise slots 208 in a ribbed feed apron 2I2. These rollers 201 are 30 adjustable, as set forth in the co-pending parent application Serial No. 129,561. A master driven roller 205 having a shaft 30| journaled in and extended through the corresponding roll bracket 200, draws the paper webs 204 from the rolls and 35 feeds it onto the apron 2l2 .to be halted or positioned above a wrapping elevator 28; 4as described in my application Serial No. 129,561, the length of paper fed being determined'by certain adjustments of the bolt 3 I1. 40

Unidirectional movement of the master feed roller 206 is effected by means of a segmental rocker gear 304, pivotally mounted as at 306 on bracket 200, and having a depending arm 308. The rocker gear is rocked by means of a link 45 or drive arm 3I2 pivotally connected at one end 310 to the depending arm 308 on the rocker gear, and at its opposite end to the 'drive arm 3l4 by means of a wing bolt 3l6 slidable in the radial slot 3I'I. 50

By adjusting the set screw 3H', the stroke of the arm 3|2 can be adjusted to vary the travel of the rocker gear and also, intimately, of the length of web fed by the master roller 206.

Referring to Fig. 2, it will be observed that 55 the master roller is driven through gear means' including a ratchet clutch (Fig. 3 also) having a clutch plate 301 which floats on the roller shaft 30| and which is provided with ratchet pawls 309 engageable with a ratchet 3|| fixed on roller shaft 30|. A gear 300 xed to the clutch plate 301 is driven by an intermediate gear 302 on shaft 303 through gear 305 driven by sector 30|. Thus each time the rocker gear 304 moves downwardly (clockwise, Fig. 2), the master roller will be advanced, the presser rollers 201 being preferably driven also to assure positive advance of the web, this being effected by means of gear 2||ib fixed on the same shaft with rollers 201, and driven by a gear 2|1b fixed on the master roller shaft.

Means for automatically severing the advanced web intimed relation to the operating of the rocker gear and associated feeding mechanism, includes a yoke-shaped knife frame 224 pivot ally mounted at one end, as at 225, on a cross bearer bracket 226, which extends between the uprights 200, and which is engaged at its opposite sides byadjustment bolts 221 slidable in horizontal slots 228 so that the knife may be slid back and forth toward and away from the carriage 88.

A front bearer 22-9 is joined with the rear bearer 226 by longitudinally extensive straps 230, and this front bearer slides on anges 24F (Figs. 4 to 6) in the frame 24 and engages the depressed or stepped ends 23| of rails 232 secured to the main rails 89 upon which the paper ultimately rests and up between which the elevator 28 moves.

The knife structure includes a fixed shear member 2|5 and a movable shear 240 hinged as at 24| on the knife frame or yoke, and this latter knife is urged toward the fixed knife or shear by spring means `mounted in bosses 235' extended from the knife frame (Fig. '1). Also mounted' on the bosses 236A are spaced rollers 236 engageable by cam fingers 231 on carriage 88.

It will be recalled that the elevator 28 and the carriage 88 move in timed relation through the central drive system, and also that the automatic web feeding mechanism is likewise driven from the central drive. When the carriage 88 is returned to the extreme (right-hand) Position in Fig. 1, the cams 231 thereon bear down on the rollers 236 on the knife or shear frame and pivot the knife structure 24| down against a section of webbing, previously advanced, and shear it against the stationary member 2 I5, so that when the carriage is ready to move forward again, the severed piece of paper is free to be pressedaround f the loaf of bread rising on elevator 28, and as the elevator retracts, another section of paperl will advance and be cut in a similar manner. Thus the severing and feeding means cooperate in timed relation to thel movement of the Wrapping mechanism.

The knife frame is normally moved up out of shearing position by means of springs 213 behind the knife 24|.

In accomplishing the several objects of the invention, only one form of arrangement has been detailed for illustrative purposes, and it will be understood that all changes and modifications which may be made to provide an equivalent mechanism, are included within the scope of the invention as defined in the appended claims.

vHaving thus described my invention, what I enum as new and desire to protect by Letters Patent is:

1. In a wrapping machine of the type ineluding a reciprocable wrapping carriage and means for feeding a web of wrapping material beneath the carriage substantially parallel to the plane -of reciprocation thereof. web shearing means comprising: coacting movable and stationary shears arranged adjacent one of the terminal reciprocal positions of said carriage, said movable shear being mounted for movement in a direc- -tion transverse to the line of reciprocation of said carriage, means normally disposing said movable shearv out of engagement with said webbing, and coasting means on said carriage and movable shear for moving the latter against said webbing to shearv the same when said carriage has moved a predetermined distance toward the aforesaid terminal position.

2. In a bread wrapping machinev of the type V.including a horizontally reciprocabl'e carriage and coacting folding instrumentalities, means for feeding a web of wrapping paper inthe direction of reciprocation of the carriage into position beneath the latter, shearing means comprising coacting stationary and movable shear members .extending transversely of said webbing near one of the reciprocal terminal positions of thecarriage, said movable shear being yieldingly urged away from said webbing and the companion shear and means on said carriage moved by the latter intoA operative engagement with said movable shear once during each complete reciprocation of the carriage for moving said movable shear toward and into shearing engagement with said webbing.

3. In a device of the class describedv having a carriage arranged for reciprocation in cooperation with other wrapping instrumentalities to effect wrapping operations on an-article, means for feeding paper webbing in the direction of reciprocation of -the carriage and in a plane substantially parallel with said direction of reciprocation for use in said wrapping operations, and means for cutting said webbing at intervals in timed relation with the movements of said carriage, said means including a. stationary shear extending transversely of said webbing near one of the terminal positions of reciprocation of the carriage, and a movable shear mounted to extend transversely of the webbing for cooperation with said stationary shear 'and also for movement toward and away from the latter into and out of shearing engagement with said webbing, means normally urging said movable shear away from the stationary shear, and means moved by said carriageinto operative engagement-with contact means on said movable shear when said carriage moves a predetermined 'distance toward said terminal position and effective to move the movable shear against said webbing to shear the latter cooperably with the stationary shear when said carriage moves an additional amount toward said terminal position.

4. In a bread wrapping machine, a reciprocable wrapping carriage, means for feeding paper webbing relative to said carriage for purposes of wrapping, and web cutting means including a movable shear yieldingly Idisposed in a nonshearing position relative to webbing fed as aforesaid, and cooperating cam means on said carriage and shear for effecting movement of the latter into shearing position relative to said webbing once during each reciprocation of the carriage.

5. In a bread wrapping machine, a reciprocably movable wrapping member, a pivoted shear, and means for feeding paper webbing past said shear toward said wrapping member for utilization by the latter in wrapping operation, means yieldingly urging said shear into non-shearing position, and cam means on said wrapping member and movable with the latter into driving engagement with said shear to move the latter into shearing position when said wrapping member is moved into a predetermined position.

wrappingmember, means for feeding a wrapping 6. In a bread wrapping machine, a reciprocabie ftively engage cooperating cam means forming a part of said shearing mechanism for moving the shear against said web to sever the latter when said wrapping member is moved to a predetermined position.

'1. Inxa bread wrappingmachine, a wrapping member arranged for periodic motion, means cooperably driven with said Wrapping member for feeding paper webbing to the latter for utilization in the wrapping operations thereof, and shearing mechanism including shear means arranged for movement transversely toward and away from said webbing, means yieldingly positioning vsaid shear means away from said webbing, and means movable by said wrapping member transiently en- Vgageable with cooperating means forming part of said shearing mechanism for moving said shear means toward said webbing to shear the latter once during each periodic movement of said wrapping member. 1,

8. In a bread wrapping'machine, a reciprocable wrapping carriage and cooperatively driven means for feedingv paper webbing into position relative to said carriage for wrapping purposes, and shearing mechanism including shear means arranged to extend transversely of said webbing and mounted for movement toward and away from said webbing and also for pivotal movement about an axis transverse to said webbing, spring means normally urging said shear means in a direction aw'ay from said webbing out of the path of movement thereof,V spring means normally pivoting said shear means in a direction toward said webbing, cam means arranged as an operative part of saidshearing mechanismI for moving said shear means toward. said webbing to severthe latter, and cooperating cam means arranged for vmovement with said carriage for transient engagementwith said first-mentioned cam means of the shearing mechanism to effect a shearing of said webbing once during each complete reciprocal-,ion of said carriage.

9. In a bread wrapping machine, a wrapping member arrangedfor movement back and forth and'cooperating means for feeding paper webbing into wrapping position relative to said wrapping member, and shearing mechanism including a knife frame mounted for pivotal movement about an axis extending Vtransversely of said webbing, for movement in a direction toward and away from the latterfspring meansV normally pivoting said frame away from said webbing, knife means -pivotally mounted on said frame for movement about an axis transverse of said webbing andvin a general direction toward and away from the latter, a stationary shear ar- Y ranged transversely of said webbing, and spring means normally urging said knife means toward said stationary shear. a cam finger projected from said wrapping member, and cam engaging means on said knife frame and engaged by said cam finger to pivot said knife frame and knife means toward said webbing once during each cycle of movement of said wrapping member.

10. In a bread wrappingmachine, a reciprocable wrapping carriage and cooperable means for feeding paper webbing in the direction of reciprocation of the carriage and into a position relative to the latter for wrapping purposes, and automatic shearing mechanism including a sta-f tionary shear arranged transversely below said webbing, a knife carrying frame pivoted for movement about an axis transverse to said webbing for movement toward and away from the 4latter on a side thereof opposite said stationary shear, movable knife means pivotally mounted on said knife frame for movement about an axis transverseof said webbing and in a general directlon toward and away from said webbing and the stationary shear therebelow, spring means normally pivoting said knife means toward said stationary shear, and spring means normally pivoting said knife frame away from said shear to dispose said knife means out of the path of

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