US2606521A

US2606521A - Adhesive applying apparatus for cigarette making machines

Info

Publication number: US2606521A
Application number: US148991A
Authority: US
Inventors: William E Wray
Original assignee: American Tobacco Co
Current assignee: Brown and Williamson Holdings Inc
Priority date: 1950-03-10
Filing date: 1950-03-10
Publication date: 1952-08-12
Anticipated expiration: 1969-08-12

Description

ug. 12, 1952 w. E. WRAY ADHESIVE APPLYING APPARATUS FOR CIGARETTE MAKING MACHINES 2 SHEETSSHEET 1 Filed March 10, 1950 FIG. 2

RAY 2,606,521 APPARATUS FOR NG MACHINES W ADHESIVE APPLY CIGARETTE M Aug, H2, 1952 ING .AKI

2 SHEETSSHEET 2 Filed March l0, 1950 'is delivered to the feed screw. 7 are presentin paste delivered to the nozzle, the

Patented Aug. 12, 1952 ADHESIVE APPLYINGAPPARAITUS .i CIGARETTE MAKINGEMALCHINES William E Wray}. R'idsville, N'.,C., a's'signortolThe American" Tobacco Company", "New-York, N. Y., acorporation (if-New Jersey ApplicationMarch 10, 1950;: Serial Noni 8,991

" 2 'Glaims. 1 This-invention. relates to machines. for applying astrip oftpasteato a moving sheetorweband .more particularly td-apparatus for. applying paste topaper in a cigarette making. machine.

As is well known, cigarettes .arernade. by .continuously feedingthepaper from aroll .at..-a predetermined speed, feeding the proper. quantity of tobacco to the papertoproduce cigarettesjof a given weight, andthencompleting the manufacture of vthe cigarettesin a continuous .rod....A

.suitable .cuttersevers. cigarettes of the .proper length from this rod.

Various improvements in cigarette. .making machines have resulted in vincreasedspeed .of production and the. apparatus. heretoforeflused for supplying. paste have proved. linadequatelin highspeed machines. In the present invention I provide a paster. which is capable of. operating at high speed withouttheattendantdisadvantages of the pasters heretoforeused.

The device consistsof apaste potarranged-on i and communicating. with a housinghiniwhi'cha revolving feed screw is mounted... At its forward end, the feedscrew is-provided with a..radi'al port communicating with a central port orpassage. The opposite-end of this port communicates with an axial passage. A nozzle is mounted on the end of the feed screwand' rotates therewith. The nozzle is provided Withan axial passagecommunicatingwitn'the axial passage in the feed screw.

The inventionalso comprises means for eliminating air bubbles from the paste as the .paste If air. bubbles portion of the paper passing. the nozzle at. the time theair bubble is released,.receives no paste and as a result the cigarette is notproperly sealed. Removal of the air-bubbles, together with the other structural features of the invention, results in a continuous feed of paste to the edge of the cigarette paper.

In the accompanying drawings I have shown one embodiment of the invention. In this show- Fig. 1 is a plan view of the paste pot mounted on the bed of a cigarette machine;

Fig. 2 is a vertical, sectional view on the irregular line 2-2 showing the support for the paste pot;

Fig. 3 is a central, longitudinal, vertical, sectional view on line 3-3 of Fig. 1;

Fig. 4 is a detailed, horizontal, sectional view on line 44 of Fig. 3; and

Fig. 5 is a detailed, vertical, sectional view on line 5-5 of Fig. 4.

" Referring to. the drawings,- the. reference =nu- .meral l designates the bodyofthefeeder-Qand it is provided with acentral bore. 2.

The bushing 3 is mountedin" the. central bore. :The feed. screw 4 is mounted in the bushing and throughout. the

. greater portion =of .the ilength ofsthe... bushing, .forms a comparativelytight fittherewith. ...'l2he iced screw. is providedwith threads 5 extending substantially throughout. the lengthofl the. bushing, the threadsr being..deeperat .the .-reareend and tapering toward.v the. front. or..o,utlet .end.

.In aspecificembodiment of.-.the ,inv.ention,'.Ithe .threads. are;- .deepat the outlet end. andtaper one-halfsdegree. toward the v.opposite v.end. .,At each end ofmthe. bushing, the. reed screweis. reduced in diameter, asindicated at; 6,..andipasses through a closure 1.. whichpreventsi'. leakage of paste. betweenthe bushing and the. zteediscrew .at. the opposite. ends. .The .feed screw .is..-adapt.ed to. rotate and is mounted! in suitable b'a1l b. ear- .ings. 8.. .A. housing 9. surrounds .the.,.ball.vbearings and .the closure. [at ,.the. rear .endlof the feedscrew and a' similar housing IE1. isiarrangedatltheflfront end.

LI .The'itop .-.of' the casting orl.-body is provided with. a circular; .flange l l .to which a..paste= .D'ot 12 may. be. secured in..any,. suitable .mannenas .bvm'ating threads IS; {The paste pot-islprovided with acover MJTIThe bottomlofilthe pastehpot is provided with.an...op,ening115.;and bushing" 3' is provided with... an l'aligned opening l 6 .wheifeby the. paste .isdelivered toxthe feed screw adjacent .the rearend. .Adjacent theforward end offthe feed screw I provide a circularjgroovel I andZIJthis groove. communicates with a radial ,port'fl 8."""I he .r'adial port. extends to: thecenten'and communi- 1 in the endfof the bore,"'l9 'inany'suitablemanner as by"adjusting nut 22.

The rear end of the feed screw is provided with a bevel gear 23 and is covered by a guard cover 24 secured to housing 9.

When the paste pot is in operative position, gear 23 meshes with a pinion 25. This pinion is mounted on a shaft 26 which passes through the bed 21 of the cigarette making machine. The lower end of shaft 26 carries a gear 28 which is driven from one of the moving shafts (not shown) of the cigarette making machine. A flanged sleeve 29 extends through the bed of the machine and forms a bearing housing for the shaft 26. Bearings 36 are arranged within this sleeve. The flange 3| is secured to the bed of the cigarette machine by bolts or studs 32. A

guard 33 for bevel gear 25 is secured to the flange. As shown (see Fig. 3) the guard extends substantially half way round the top of the gear and cooperates with the cover 24 to form a complete housing when the parts are in the operative position shown in Fig. 3 of the drawings.

Fig. 1 of the drawings shows the paster in uperative position in full lines, and in inoperative position in dotted lines. As shown in Figs. 1 and 2, the base I of the machine is provided with an arm 34 terminating in a sleeve 35. This sleeve is received on a post 36, the post being mounted on a plate 31 which is received in a recess in the bed 21 of the cigarette making machine. The plate 31 and post 36 are retained in position by bolts or ing 4| in the top. The post is in turn provided with a threaded bore 42 in alignment with the threaded opening 41. These openings are provided with threads of different pitch and a differential screw 43 passes through the opening 4| in the sleeve and is received in the bore 32. It will be apparent that when the screw 43 is turned, the difference in the pitch of the threads on the two portions thereof will cause the sleeve 39, and therefore the paste pot, to be raised or lowered, as indicated in dotted lines, thus permitting vertical adjustment of the nozzle.

Sleeve 35 is split as shown at 44 in Fig. 1 of the drawings. A clamping screw 5 is passed through aligned openings in the two ears 45, one of which is threaded to receive the screw 45, and the clamping screw is provided with an operating handle 41. By turning the handle 41 to release the clamping screw, the paste pot may be swung away from the path of the cigarette rod as indicated in dotted lines in Fig. 1 of the drawings. This permits easier access to the paste pot for any repairs or adjustments. When the paste pot is swung into its operative position, the cover 24 cooperates with guard 33 to cover the pinion 25.

As stated, throughout most of the length of the bushing 3 and the feed screw 4, the feed screw forms a comparatively close fit in the bushing. As a result, the paste in the threads 5 is milled as it passes along the feed screw and is thus delivered to the bore 19 of an even consistency. In alignment with the openings I5 and 16 in the bottom of the paste pot and the bushing, the bore of the bushing is eccentric, as indicated at 48 in Fig. 5 of the drawings. As shown, the wall of the bushing at this portion tapers in thickness from the opening [6 to the bottom as indicated at 49. This provides a passage or chamber 58 surrounding the feed screw which is wider at the top and tapers to the depth of the thread 5 at the bottom. In actual use of the paster I have found that this eliminates air bubbles which get into the paste in the paste pot due to slight agitation caused by feed of the paste from the bottom of the paste pot.

I claim:

1. A paster for cigarette making machines comprising a body having a cylindrical bore, a bushing mounted in the bore, a threaded feed screw mounted in the bushing, the feed screw being snugly received within the bushing throughout most of its length, the bushing being provided with an eccentric portion adjacent its rear end providing a chamber surrounding the feed screw tapering in width, the chamber being of greatest width at its top and being open at the top to receive paste, the feed screw being provided with a radial port adjacent its forward end and an axial bore communicating with the radial port, a nozzle mounted in the bore and rotatable with the feed screw, and means for rotating the feed screw and the nozzle to deposit paste on the paper passing the end of the nozzle.

2. A paster for cigarette making machines comprising a body having a bore, the bore being cylindrical throughout most of its length and being provided with an eccentric portion adjacent its rear end, a threaded feed screw mounted in the bore, the feed screw being snugly received throughout the cylindrical portion of the bore, the eccentric portion of the bore forming a chamber surrounding the feed screw tapering in width, the chamber being of greatest width at its top and being open at the top to receive paste, the feed screw being provided with a radial port adjacent its forward end, and an axial bore communicating with the radial port, a nozzle mounted in the bore and rotatable with the feed screw, and means for rotating the feed screw and the nozzle.

WILLIAM E. WRAY.

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

UNITED STATES PA'IENTS Number Name Date 532,645 Cushing et a1 Jan. 15, 1895 1,390,930 Scott Sept. 13, 1921 2,111,865 MacKenzie Mar. 22, 1938 2,130,689 Leary Sept. 20, 1938 2,286,405 Gordon June 24, 1942 2,343,529 Brown Mar. '7, 1944 2,407,503 Magerkurth et a1. Sept. 10, 1946