US2615492A - Strip applying device - Google Patents

Description

R. H. HOLMWOO ETAL Oct. 2, l.1952

ASTRIP APPLYING DEVICE original-Filed Feb. 12, 1947 4 Sheets-Sheet 1 Oct. 28, 1952 R. H. HOLMW ETAL 2,615,492 STRIP APPLYIN `DEVICE original Filed Fel?. 12, 194?v 4 sheets-sheet 2 AG-ENT9J Oc't. 28, 1952 R. HoLMwob ET AL 2,615,492

STRIP APPIAYING DEVICE 4 Sheets-Sheet 3 Original Filed Feb. 12, 1947 MXGQ'TW Patented Oct. 28, 1952 UNITED y STATES STRIP APPLYING DEVICE Richard H. Holmwood, Binghamton, N. Y., and

Paul A. Hauck, Union, N. J., assignors to International Business Machines Corporation, New York, N. Y., a corporation of New York Original application February 12, 1947, Serial No. 728,050. Divided and this application April 20, 1948, Serial No. 22,068

2 Claims. l

This invention relates to a device for applying strips of material to cover apertures in a web, and more particularly to a device for applying strips of stencil material to stencil cards produced in machines of the type illustrated in a copending application, Serial No. 728,050, led February 12, 1947, now Patent No. 2,518,010, of which this application is a division.

An object of the invention is to provide a device for attaching portions of stencil material to windows or apertures in a moving web.

Another object of the invention is to provide a stencil picker for removing singly a stencil sheet from a stack of such sheets and delivering it to an attaching mechanism.

lA still further object of this invention is to provide means for preventing adhesive material from contaminating operating components in a strip applying device when the supply of strips becomes exhausted.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings: l

Fig. 1 is a side elevation view of a stencil card producing machine into which the features of the present invention have bee'nvincorporated.

Fig. 2 is a sectional view' of the stencil material feeding mechanism shown under the reference number 66 of Fig. 1.

l Fig. 3 is a sectional view showing the mechanism, which prevents contamination of certain of the working parts by the adhesive.

Fig. 4 is a sectional View illustrating certainl components of the tissue feeding mechanism.

Fig. 5 is a detail view of the tissue picker andk the tissue supply magazine.

Fig. 6 is a sectional View of the tissue picker along the line 5 6 of Fig. 5.

Fig. 7 is a detail view of thebottom of one of the two toes of the tissue picker, along the lines 'I-T of Fig. 5.

The overall layout of a stencil card machine in which the present invention is embodied is illustrated in Fig. 1.

A spindle 55 carries a roll of double width card stock 5I which is fed over an idler roll 52 to be engaged by a tensioning roller 53 and thence over a guide roller 54 to a pair of feed rollers 55 and 56 in astock feeding and inking mechanism 51. The strip of card stock is then fed over tension measuring rollers 58 and 59 and a platen 60 betissue feeding mechanism 55.

mechanism 65 operates toapply sheets of stencil tissue to the strip of card stock which thereafter passes over a folding rod 67 Where the stripvis' folded longitudinally to form a two ply strip to pass between rollers in the closing and pressing mechanism B8. The strip is then fed by the last mentioned rollers under the press and out 01T die 69, which severs the strip into card lengths each containing a stencil tissue portion. The card l2, thus formed, is thereafter fed between the ejector rolls I0- and II onto a table 'I3.

With further reference to Fig. 1, the prime mover for the machine is an electric motor 'I4 which drives a pulley 'I5 attached to a shaftf. A dual speed drive assembly, provided with `the necessary gearing, is connected to the shaft 'I6 by a clutch mechanism under control oi a handle 'I'I to providevlow speed and high speedmachine operation. The drive mechanism will be described in detail later herein. Hoppers- 'I8 are provided in the base of the machine toreceive the cuttings from the card stock under action of the die 63. A necessary accessory to the subject machine is a pump 19, capable of providing both suction and compressed air, which is also located in the base of the machine. A reservoir 85 is located at one end of the machine for containingA liquid adhesive such as glue. A pump 3l is provided for pumping the adhesive to the adhesive roller 56, located near one end of the machine.

Reference is made to Figs. 2, 3, 4,'and 5 relative to the tissue feeding mechanism 56. 'Sheets of stencil tissue are supplied from a stack in a hopper 2I0. A jet of air from a pipe 2| I is blown through an orifice 2I2 to fan the edges' of the top sheets against a retaining catch 2 I3 (see Fig. 5). A suction foot 2 I4, due to motion imparted to it, dips into contact with the top sheet withdrawing the sheet from under the catch 2I3.

The foot 2M then rises and moves in the opposite direction (to the left as viewed in Fig. 4)

drawing the sheet to a position above a hollowl thin. stencil sheets.

The slide 2H is carried by an arm 22| pivoted at 222 on a bracket 223 and has a cam follower 224 supported upon it by a foot 225. The follower 224 rides a cam 226, which raises the slide 2|?, or loWersit. The .motion of the foot 2 i4 thereby is made'up of the composite motions of the reciprocating carriage 2|6 and the raising and lowering of the slide 2 l1.

The feed drum 215 is a semi-hollow roller provided with two active sectors 221 and two inactive sectors 228 (see Figs. 2 and 4:). The active sectors 221 have a series of holes) 229, the axes of which are parallel with radii of thedrurn 245. Striating channels 235 are provided 'onthe periphery of theV drum 2 5 extending laterally from each hole 229. A circular face valve'239 has an elongated arcuate port 23| (Fig. 2) which is maintained at a pressure below atmospheric by a pipe 232 leading to afvsuction pump 'I9 (see Fig. 1). The valve. 230 also has a port 233 (Fig. 2), which is maintained ata pressure above atmosv pheric bya pipe 23:3 leading tothe highy pressure `side vof pump' 19. The holes;229 indrum 215 (see 2) are arranged to'have channels, 235which connect with the ports23! and 233rso that, as "'the.drum"2|5. is rotated, 'eachhole 222V via its V:.channel`235 will communicate .witlrthe port 23| '.fromltheitime-it,passes' the top center line of the .'.drum`2 |5 untilit reaches the 'bottom center line ...ofthe `drumw2|5 (seeFig. 4), and thereafter for a fraction v'ofthedrums cyclepf rotation each ..1hole.229 via .its channel 235 will communicate .,withtheport .233.

Normally 'whenairpressure is. su'ddently ap- ;-.-plied,-.throughan openingina member against a 2. 5, :the overhanging I.portion of the stencil Asheet K4:being seizedby the adhesive surface of the card stools-upon coming into vcontact therewith.

r In the manner justfdescribeda 4sheet of :stencil V-Ltissue delivered to the drum2|5-by the foot 2M ,'willfbe held to the periphery of thefdrumby the '.suction from the holes 229 Yfor `a rpredetermined tgperiodas the drum-is rotated, and then gradually forced'from the peripheryof .thefdrum by suc- .cessive'z blasts of air-fromthe holes 229,-the stencil `r.sheet being-seized after .each blast by` the adhesive :coating onthe card stock, therebyeect- ..i'ng-ajpeeling'of'thefsheet from the drum 2 i 5. The @valve-.239 is-adjusted' byarod 236 'sott-hat a sheet yof stencil tissue is forced from the` drum-as the sheet passes the 7bottom 'cen-ter line of .the drum 2 |5'f(seel Eig.` 4) where vthe card stock-passesover raecounterroller-.231, Athe adhesive lsurface of the card stockfconta'cting'astencil tissue for the first -;tin1e` in thatilocation. The cardstock is fedbev-tweenthe drum 215,- and the-roller 231-' so that a stencil tissue delivered from the :diurne-ZIE is superimposed upon an aperture in the card stock.

It is to'be noted that the striating channels `provided with the holes 229 on the periphery of the drum Y2|5 are to prevent the deformation of the It is to be noted-further that suction is constantly applied to the foot 2 |11 and that a stencil tissue is removed from the foot 2|4 by being seized between the drum 2 l5 and a feed roller 238 which together form a feeding couple (see Fig. 2), the stencil sheet passing under the 5 `roller 233 ontothe periphery of the drum 2 I 5 and being -adhered theretoby `suction from the holes 229.

The counterroller 231 is journalled on a rock- V-ing `frame 239 (see Fig. 3) which is supported on l0 a shaft'249, and is urged to rotate about the shaft in a ciockwise Adirection by a spring 24|, thereby holding'the-roller 231 against the drum 2|5. A -canr 252 of similar contour is mounted, coaxially, to "the'drum'25- Cam 242 coacts with a roller 15,'243 journalled'on'an arm 244 pivoted on the 1 frame '239 .byastud 245. An interposer 246 piv- .otedon'anotherstud 241 on the frame 239 is provided With two notches 248 and 249 to coact with a pin 250 on the arm 244. The interposer 245 is biased by a spring 25| so that the roller 243-wil1 be positioned toI cause therocking'frame '1239 to' be displaoedby Vthe cam`242'withdrawing the roller 231, and thestrip-of Acardstock passing v-over'it, -from contactrwiththe'drum 245.

YThe exhaust-3252 lof anormally expanded-'bellows-253 is connected'with"thefport'23|. AiBowden wire 254, attached'1to-'thediaphragm` Ofthe bellows, is fastened to the'.'interposer246"by a clamp 2 55 vso that wheirthe. bellowsi'is `4expanded theV interposer is held withthe'notch"249"engag ing the pin25 .(asshownin'fEigSL The bellows1253 willbe expanded 'by' atmosphericpressure when .there isno sheet of stencil tissue covering the holes 229, when the valve 239,.' is'iirnprop- Aerly adjusted, or when the vacuum .suction of pumpIS fails. `1`In any f these events theperipheral-surface` Yof the f drurn2l5 will not be contacted by the adhesive ,materialen the card stock since the roller"23,. whichsupportsfthe 40 card. stock under the drum, is cammed ,.away. Normal-lv,` however, when .the machine..isop eratingthere will...be As uicient.suction' from the ,port 23| to.` hold-[the .bellows 253. in .a .collapsed state.` thereby tensioning .the Bowden wire.'254 to pull the interposerf246..toengage '.the.not.chl248 with the pin 250 whereby.the.,roller.."23'|..-is no longer .cammed away fromthe drum 2125.

.The drive for vthe tissue. feeding. mechanism 66 is provided .by thechain |98 .(seejE'ig. .1) which' engages anddrives .thesprocket' 256 (Fig. 2). The sprocket. 256. is. xedto. a..shaft251 which carries a gear 258, thedrum 2|5, vandthe .cam 242. The spring 259 shownabout shaft 251 is for the `purpose .of .holdingthe drum.2|5 .against the valve 23D, ar type offace valve. The gear -258 `drives a gearlli()l whichis fixed to .ashaft 26| carryinga.gear.2l2, the cam 226,.the feed roll 238,- anda camf264 .(which operates the eccentric strap 229). The gear.262 drives .the hop- 0 per feed gearing via'idlers (not shownband a bevel gear 269 whichfdrives anotherbevelgear 210 :attached -to a` lhopper feed shaft -21 I.

Detai-lsvof the suction foot-,2|4uareshownin Figs. 6 and '7. It is to be not-ed. that theviews zin tfFigs. 6 .and 7V represent .approximately one r half :of thefsuction foot,y therebeing twov such sections 2Mb per suction foot. .The bottom of -theffootismade concave asshowni-seealsc Fig.

g5 so that not more .than a. single .sheet .offstencil 70. .tissue .-is picked each time .the .foot .engages v.the

stackfinthe `hopper 21.0, .Striationsi'2l2areprop `-,vided-inthe bottomeof .eachsection of. the foot `.to :insu-re uniform gripping. ofthe .stenciLsheet and toprevent its becoming deformedduetothe action of atmospheric pressure.

In order that the stack of sheets of stencil material is presented properly to the suction foot 2I4, as a result of the jet of air blown from the orifice 2I2, the top of the stack must be kept constantly at a uniform distance from the catch 213 (Fig. 5). A hopper feed is provided as shown in Fig. 4. A platform 213 is provided and arranged to be elevated within the hopper 210 to lift the stack of sheets as they are withdrawn by the foot 2I4. An extension of the platform 213 is attached to a collar which rides on a threaded part 215 of the hopper feed shaft 21|. The collar is provided with a toothed lug which is spring urged against the threaded part 215 to advance the collar and its associated platform as the shaft rotates. A handle 211 serves to release the lug so that the platform 213 may be lowered when a freshly lled hopper is plac'ed in the machine. y

While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a preferred embodiment, it will be understood that various omissions and substitutions and changes in form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is: Y

1. In a machine of the class described wherein a web is fed between pairs of rollers, a pair of rollers, one of the rollers of said pair being provided with a series of air ports having peripheral openings, means for producing a suction in the said ports for causing a piece of tissue to adhere thereto at the said openings, a pivoted arm for supporting the other roller of said pair, a spring normally biasing the second said roller against the first said roller to contact the web between them, means for displacing the second said roller against the bias of the said spring,

6 and means under control of the said openings for actuating the said roller displacing means whereby the absence of a piece of tissue adhering to the rst said roller causes the second saidv roller to be displaced therefrom thereby breaking its contact with the said web.

2. In a machine of the class described wherein a web is fed between pairs of rollers, a pair of rollers, one of the rollers of said pair being provided with a series of air ports having peripheral openings, means for producing a suction in the said ports for causing a piece of tissue to adhere thereto at the said openings, a pivoted arm for supporting the other roller of said pair, a spring normally biasing the second said roller against the rst said roller to contact the web between them, a cam on the iirst said roller for displacing the second said roller therefrom, a bellows cooperating with the said suction means, an interposer for disabling the said cam, and a Bowden wire connecting the said interposer and the said bellows whereby a contraction of the latter due to the presence of a piece of tissue covering the said openings retains the said interposer operative for separating the said rollers and releasing the contact with the said web.

RICHARD H. HOLMWOOD. PAUL A. HAUCK.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 696,186 Orloff Mar. 25, 1902 1,304,943 Clark May 27, 1919 1,867,038 Upham July 12, 1932 2,189,673 McNamee Feb. 6, 1940 2,202,496 Bombard May 28, 1940 2,206,043 Novick July 2, 1940 2,220,255 Marchev et al Nov. 5, 1940 2,384,231 Bamford Sept. 4, 1945

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