US2384021A - Adhesive applying system - Google Patents

Description

Sept. 4, 1945. T. A. FEDERwrrz E-r Al. I 2,384,021

ADHES IVE APPLYING SYSTEM s sheets-sheet 1 `Fild .June 13, 1941 Sapt. 4,1945. T. A. FEDERwYlTz ETAL. I .2,384,021

l A ADHESIVE APPLYING SYSTEM V Filed June 13, 1941 8 Sheets-Sheet 2 ATTORNEY Sept. 4, 1945. T. A. FEDERwlTz ET AL 2,384,021

ADHS IVE APLYING SYSTEM lFiled -.June 1s, 1941 8 sheets-sheet 4 I -Malfbl- ATTORNEY Sept. 4, 1945. T. A; FEDERwl-rz ETAL y u 2,384,021

ADfmsIyE- APPLYING SYSTEM Filed June 13 1941 V 8 Sheets-Sheet4 5l ATTORNEY1 Spt.- 4, 1945. T. A. FEDERWITZ ET AL ADHES IVE APPLYING SYSTEM 8 Shets-Sheet 6 Filed June 413 1941 ATTORN EY -mmf Sw.. QM@ NN Sept. 4, 1945.` T. A. FEDERwlTz Erm.

ADHES IVE APPLYING SYSTEM Filed June 1:5, 1941 Y zay shuts-sheet fr vE TORS ATTORN EY Sept. 4,l 1945. T. A. FEDERwl-rz ETAL 2,384,021

' ADHESIVE APPLYING SYSTEM I Filed Junels, 1941 a sheets-sheet s lNvE Tons al ATTORNEY Patented Sept. 4, 1945 UNlTEp Y'v sTATEs lPAT,ENT-ff-oFlFlCls-fl 2,384,021 y ADHESIVE APPLYING SYSTEM l l Theodore A. Federwitz andV Hans Gmtewold, Philadelphia, Pa., assignors to Stokes & Smith Company, Philadelphia, Pa., a corporation of Penny j Sylvania vApplication June 13, 1941, SerialNo. 397,894 i 26 Claims.

for delivery of'tabs to the ltabbing station for Aattachment there to a wrapper; more particv, ularly the wrapper-feeding'mechansm includes a suction-,gripper head'to whose suction supply line is connected a bleeder'valve operative to' release a clutch between tab-feeding rolls, or equivalent, and their source of power upon failure of the suction head t'o engagea wrapper at. usual time in the cycle of the machine. i.

Further in accordance with our invention, th 'movement of'the rsuction head is so controlled that, at-the endof each cycle of the apparatus, it i sclose lto the wrapper next `to Ilne-fed by it but is then ineffective to engage that wrapperbecause suction is vsupplied to the headlonly for a period terminating before' `the end of the cycle;.more

-particularly'there `are connected to 'the suction .supply line for the feeder head two bleeder valves, one of which is closed` for a period continuous through the latter part of each cycle and the y section, andparts omitted and broken away,

earlier part of the next cycle,c'a`.nd'theother of 4which valves is openat the end of each? cycle' vto effect inoperativeness` of ithe v'suction 'head 'not- :withstanding the; ilrst valve is thenclosed," and which secondv named valve is closed early in: each fcycle; to maintain engagement of .the Vsuction head with a wrapper whileboth valves are closedfl Our invention' further' resides 'in the 'features of combination, constructiony and arrangement hereinafter described and claimed. f:

, For an understanding `of our invention and, for illustrationfof a'preferred embodiment'ther'e offreference is made to ings in which:

Fig. 1 is aI side view,with parts insectimand theaccompanyingV drawshowing, from oppositeside of the machine, features of construction not appearing in Fig. l.

Fig.' 4 in perspectiva'shows further details of construction i of *wrapper-.feeding mechanism shown in Figs; 1-3. 1 y

Fig. 5, Withparts in'section and partsbroken away, is a front elevational-view of the machine shown in Figs.' 1 3..

Fig. 6, in perspective,shows further features of construction of tabbing mechanism appearing in Fig. 1. n

, Fig..7 is a detail viewshowing driving means for parts appearingv in Fig. 6.'

Fig. 8, in perspective, is a fragmentary view showing adhesive-'coated rolls and a spray-head for cleaning them.

Fig. 9 is a side elevational view, with parts omitted, showing internal features of construction of a tabbing head appearing, in Figs. 1 and 6.

Fig. 1 0 is a rear view, partly in section and with parts omitted, of the tabbing head, Fig. 9.

Fig. 11, a fragmentary elevational View in section, shows an arrangement `for controlling a clutch to tab-feeding rolls ,of the tabbing heads ofFigs.1and6. I .f

Figs. 12 and 13 are detailyviews showing parts appearing in Fig. 11Min diiferent operating positions.'

Fig. 1,4 is 'a "fragmentary view, illustrating an additional control arrangement for the clutch mechanism appearing in Fig. 1,1. A

Figs. l5, 16 and 16A are plan views of tabbed Wrappers.

.Fig. 117 is a detail'view, in side elevation and partly in section of mechanism effectingy timed operation of rockshafts appearing in Figs. 1, 6, 9

'and 10.

cams of Figs. 17 and 18.*v

Fig. 21 is a chart or diagram illustrative of the 'timing relations'betweerrsignificant elements partsbroken-awayyof apparatus suited to apply adhesive to tabs andattach thenrto'wrappersy concurrently with .coating of 'they wrappers` with adhesive. Y

Fig.2 is a detail vview showing `parts-a'r'ipea'ring iin Fig. 1 in a diilerentoperating position-i4 1; Fig. v3 is 'a side elevationalview, with Vparts Ainr of the apparatus shown ln'Figs. 1-20.

Oncev for achf cycle' of the mechanism G, generally similar toI that disclosed in Letters Patent Nos. `1,806,181 and. 1,857,260 to Ernest G. Rider, a wrapperW'is separated from the stack S thereof, Fig.v 1, and fed-into` engagement with the `adhesive-coated roll I from which' it is deflected as `by the strlppinglknives 2 onto an endless lconveyor C, preferably ofthe suctiontype disclosed in Letters -Patent No.`1.818,l98"to S. H. Davis.

Boxes or .box'fblanks registered upon the coated tweensuccessive cyclescf thefmachina-.there is notimpose'd upon .the suctiompump P fthe/heavy loadexistant when-a Wrapper is'held` by'vsuction against theheads 'The valve 23, normally open to afford coml' -munication between Ypipes. 24 and 22I is provided to disable the suction-heads ,ofythe wrapper- ;separating mechanismso to precludefeed of further wrappers from thestack to the,conveyor C- when it is desired by. continued `step-by-step operation of the conveyor .to clear, it of the wrapvpers thereon. The movable element 39 of the valve 23,'shown in normal position in Fig. 3, is

connected by link 40 to? arm 4I` attached to-.shaft 4|A supported. by. brackets 42 extending.` downwardly from opposite sides of the housing 43 of thesuction conveyorC.` Thev bar 44, connected ,byarm to shaft 4IA, extends to position con- .venient for control of valve 23 byA the operator 'Ihis same linkage, ,as hereinj .after appears,l is part. of. an, arrangement providof the machine.

ing for manual interruption of the feeding of ltabs .to the adhesive-coatedroll `I of mecha-` nism G.

Referring to Figs. 1, 3 andl 4the .stack of sheets is supported by a platform46 the forwardportion .41 of which is pivoted or hinged at 48 Vto provide for'an adjustment to greater or less .extent bowingthe wrappers by elevating the front .end-,of

the stack S with respect to the remainderl thereof.-

Inwthe particular arrangement s hoWIL. thc-tangular adjustment of the hinged portion 41 is effected by linkage including the bell crank lever 49 pivotally mounted upon the Y,head 50 ofwplunger, 51|, brackets 5|A depending from the hinged mem-Ml ber 41, threaded Vbar52 extending from beILcrank lever 49 through bracket 53 attached to head 50,

and the threaded stop member 54 which is manually adjustable, during operation of the vmachine vif that be necessary, to obtaindesired inclina-if.

This feature of applicantsinvention isof importance in .adapttion. of platform, member 41.

ing the machine to feed sheets or wrappers varying widely. inA dimensions, weight, .,composition, surfaceflnish, etc.;. for example, large` or small sheets'of Cellophane, or like film material,` glazed 1 papers, and in general, sheets ofpaper or other material having decided tendency to .curl...;

Further to insure separationl of` onlyel single tion heads 4.are in position suitably short of contact withthe top wrapper. The, suction exerted through the heads therefore draws only thetop wrapper toward them; the forward portion of the wrapper bends lmore `or lessa sharply'` about .the forward edge of the stop 55 as a. fulcrum and separates from the corresponding portion of the .next lowerwrapper. Thestopmember, 5511sA adjustableto obtain optimum resultsvwith wrappers l oi' different dimensions and characteristics.

As the stack S isdepleted, the platform 46 Sis h elevated by mechanism. now described `to main'- tain the top 'ofthe stackin proper position for separation o f wrappers therefrom by the suction heads. Referring to Fig, 4, there is attached to the supporting member of the suction heads anarm 51 to which is adjustablyi,securedl the -latch-operatingmember 58..y So longas the .top of the vstack is-atthe desired leve1, 1the.membery `58 during .the oscillations of 'the isuction. head frame about its pivots 6, 6 is ineffective to. release --the latch 59'pivoted at- 60 tothe side frame`1 of l.the machine. .been to f sufiicientfextent. depleted, the'stop 55 .Wheny however the stack `Slhas does not enga-gelthe top of 'the stack until after;

'lriff at all, the m'emlber 58 has engaged latch 59 sheet or wrapper, there is provided, Figs.- 3and 4, 5o

, the stop member adjustably secured, as by v thumb screw 56, tovmanifold 2l or to some other lmember attached to and movable .with the supporting tube orbar.3 for the suction heads 4. The stop 55 is so adjusted that when it is in engagement with thevtop of, the stack the sucshaft .subsequent cycle? of. the` machine tripped by descent vofbar 61.` Assuming 1atch'59,x=.Fig. 4, has beentripped -`inresponsefto low level of the stack by abnormal and moved it awayfrom its stop 6l invopposition to the biasing spring 62.1 When latch 159..'isso 4.moved :froms'its .'normalposition; the lever 63 llp'ivotedat 64 to lthe s ide frame of the machine f moves.downwardlyjinto.fthenotch 65 of latchz59 vl-andis 'there held until lever 63 is returnedhto` its original position by mechanism, including cam 86 (Fig. 3), hereinafter described.. l ...The extent t0 which the suction heads may devto engage and trip the latch69 pivotally mounted at 10 to the side frame of the: machine. u When `@latch 68 is rocked in .clockwise .direction away f from? stop 10A in opposition 'to its biasing` spring ;1I, it permits .the frame .12, loosely mountedzon shaft-13, to swing-in clockwise direction;under Itheinfiuence` of: its .biasing Ispring 13A'.

When frame 12 is in'its normalposition, Fig.

3, the fpin 14.` atthelowerV end of theoscillating .arm I:3 .moves freely in -thezslot .15 in; block 16 zattached `to thelink 11 extending.` from, andpivotally `-mounted at. 18 to` .frame 12. everfthe frame 1211s releasediby :the aforesaid ac- ..tuation of latchA 69, yit-ismoved by spring 13A to such po'sitionthat duringithe subsequentoscillation of army I3 the pin 14 `engages an end of :the

.When howslot` 15 and returns the frame .12 tothe positionsh'own in Fig-i3. Duringv such return movement, thepawl `19fmounted vupon the frame .12

lis-eifectivevv to rotate the ratchet` 88 attached-.to 13 and so .move-Ithe. stack-supporting plunger 5l .fupwa'rdlynthrough' .thexgearing in- :icluding gearl 8|` attached to shaft 13, gears Bland 83' attached to .i shaft 84,.' and .the rack .member -`,'85--attached t'o or integral withathe plunger. 5I.

vAtor-before'the .end ofthe return movement4 of frame 12, the.latch.69, because permitted by-re- .traction of its tripping'member 68 vas hereinafter described, returns Ito the latchingpositio'n shown `in"1"ig.l3 andtherel remains until` in thenextor it vis again movement of the suction heads, as abovevde scribed,it is re-set subsequently in the same-cycleV of the machine by engagement of the rise of cam lmember 86 (Fig: 3) attached to the reciproeating carriage Il, with the roller 81, or equiva- :lent-abutment,l extending from the' bar 61.; more p'articularly,.;upon return movement of the car- .riage IVI toward the positionshown in Fig. 3, the cam 86 liftsthe: bar 61, rvin opposition to biasing `:spring 88, to,.swing'lever v63, Fig..t4', `in counter .clockwisedirection out of ithewnotch 65 of. latch 59.- I'I'hexbiasing spring 62. is thereupon .eiective togreturn xthelatch 59- toits normal position, shown .ini-Fig. 4, in .which it iseectiveto hold effective immediately' to 'advance f the"` tab strip' 'IS when theish'aft |01 `-i's rocked' to bring vthe' upper 'feed roll into engagement vwith the tab strip and forcev it against the lowerffeed'roll. To ensure the tabs fed from' one' head- 94 shall equal in length the tabs'fed from the other head,

at least one head is provided '(Fig. 6) `with an ad` justable member 280 `(corresponding with knob |52 of aforesaid Rider Patent 1,857 ,260) tochange the pressure betweenits'ftab-feedingrolls 02, A 03.

The sleeve |63, rotatably supported by the sides |52 of the head 94, slidably receives the rockshaft and fis suitably internally shaped to insure its angular movement with the Shaft. The arm |64 for actuating the blade ||2 'fits' thesleeve |63l loosely but is adjustably clamped tothe arm' |65 rigidly attached to sleeve |63 for angular 'movement therewith; ythe clamping` bolt |66 passes through afslotiprovided in armj |64 to-permit the mechanism, the' tab feeding-mechanism, the

pressure applying discs '||4, ||5,1`the brake,`and the supporting bracket 96, the head Iis rst unclamped byloosenirigthe `nut' |68 vatthe upper end' of the'stud |69 (Figs. land) which extends upwardlypfrom" the top'of the head"through`the cross-rail |'1'0rof the' bridgea' Theicrank 95 is then Irotated in' properv direction andto proper extent to slide `the headftransversely of the bridgel to the desired position'through theintermediary of bevel gears |1|, |12 and the rod |13attached to the latter and threadably engaging the head 94. When the headsare: in the desired position suited "to the Wrappersrto be tabbed, they-'fare clamped in place `by re-tightening'the nuts Y |68:y

'In event vthe suction-'heads 4 ldo no tybecause of depletion of` the stack or for any other reason, deliver a wrapperto `the feed rolls 4|1, I9, it` is desirable the tab feeding mechanism bezdisabled;

otherwise coated tabs Will'bedeliver'edto the conveyor C,"and because the under faces of the tabs are coated with adhesivethey willmsti'ckvtouand foul the surface of the*V conveyor;

Referring particularly` to Figs.Y v3,' 41,1, v12,` to

, 14, the shaft v|50 of the clutch. |41,y |49', rirftfne* driving train of the tab fed"shaftj.|48,is provided withcollars 150A ,forlreceivingfthe abut-v ments Aor anti-friction rollers carried by theyoke arm attachedto shaft, |1 |.4 .The .ann v|'11'attached to shaft |16 is .lconnectedvvto an arm |`18,by link Us. -The `shaft flauto V4which armns is attachedl is supported bybracket |8|` fromthe side frame,1.of the machine. `f1`oshaft |80-is attached another arm |182 1upon which-,ispivotallymountedtheilatchmember 83.,il f Movement of the 'upperf'end of thev latch meme' berisnormally restrained by `notched `arrn |85 secured to shaft |86 also. supported by bracket |8| and towhichl islattached the'operating mem,-` b, er,|81.A Within the suction :chamber |68l con nected, as by pipe |89, to the suction chamber'of valve 25, Fig. 3, `is disposed a plunger |90 whose stem |9 lexternally of th'e suction chamber is movable, Vunder circumstances hereinafter11.1611'-` disengagement 4of lclutch members v|41,v |49.

l-At thatfportion` of thelm'achine cycle during which a wrapper isheldibyfsuction against sucitiohheads T4', the valvesf-25and 3|' are'closed and the 'suction within the vchamber |88 iseffectlve'to hold'l the' plungerf|90 "in its lo'vve'rm'ostv position against the bias of' spring |9221- Consequently so long-fas thev suctionl heads 4 lifta wrapper inv each cycle, the"latchflil3lla1'1dl associated parts remain in' their inoperative position shown inv Fig. l3-and th'ereisl .no'interruption of rotation -of the tab'feed shaft VI 48." i' If however;the suction' heads4 fail in any:A cycle to'lift a "'she'et, because. forxexample; of thedepletion of the stack, failure of :thesuction pump, -or any-'other "cause,` ythe spring |92 causes thestem` of piston-@|90 to-:riseandl engage the operating member v| 81A whereupon the yarm |85. is

moved counter-clockwise from the, position shown f in Fig. 13 to the position shown' in Fig; 12 so releasing the latch member |83 from' thenotch.; |84 and allowing biasing spring `|,973tomove latchv |63, f. about pivot |94. Uponmovementpfarm` i3 incounter-clockwise vdirection :froxn `the.` ,position-V shown inFig. 13, the adjustable 1abutment or stop* member |95 movable therewith engages the. shoulv der |96 of the Areleasedflatch memberf|83 and,

through the linkage'comprising arms I8\2 |18,-

operating member, |15'to movegin'fcounterclockf` wise direction,` Fig. 11, and-'so withdraw thedrivfH ing'clutch member |4'9 fromthedriven clutch.,

Consequentlywhen; during thatvcycleof the machine, the'shaft` |01 yis,subsequently-rocked to effect i engagement of :the upper. feed'roll with1the tab strip, there is no feeding of the tabs becausethe fed rolls are not in irotati'on. IBecausethe tab strip -has not been.advanced,' the 'operation of the knives |'|2;in that cycle of the -machine does not,-

detach tabs v from ,-thetabstrip and livered to'thetransferjroll |.V i

Subsequently in `the same'cycle of the machineV during return 'strokeof yarm f|3, the adjustable none. lare de-v stop v|91atta'che'djtoarm|3 engages the latch,- member |83 and resets ittothe restrained position, Fig. 13, to providefor-,feed ofrtabswhen the` heads l4 againlift a wrapper. Therefore solong as the suctionheads are ineffectiveto lift a wrapper, the clutch members |41,;|49f are disengaged in each cyclebeforethe `rockshaft |l1.,lower s the upper feed roll |03 and arere-.engaged in each cycle` aftershaft` |01 has been reversely rocked to lift the upper feed roll away-fromlthe lower` feed,

roll. i

Withthe apparatus as thusA fardescribed, ifrthe. operator should disablethe. suction heads4 by,k

closingfthe valve 23, the suction-responsivedevice includingthe piston |90 would not respond to theA intended resultant failure` of thesuctionheads .to

lift a wrapper, and consequently tabs alone would,

' except` for the. control Iarrangement,now, de-

sc ribed,` be fed' to vthe adhesive-coated roll`7| l and transferred to the conveyor', `To insure disengagement of theclut'ch membersY |41, ,|49 inthe drive' to the tab `feed rou shaft Haw'hen the suction vheads 4 are thusintentionallydisabled'by the operator,"there is providedQFigs'i/ijad ,14,ybee4 tween'the shaft |16 and the operating link` 40 of valve 23, thearm i202 'adjustably secured to vlink 40 and connected by link 203 to arm ,204 Vattached to one end of shaft 205 supported by bracket 206 from the side frame Tof the machine'.` To'tlie other end of shaft 205: i'sattache'd arm ',201 nor` maliy out of engagement'withfarm 208"(ful1 line1 tioned-l toengag'e the operating arm |81 and effect position, Fig. 14) attachedtof shaft |16. When'-v the operator.. by operation4 of -bar `44- Vand link 4U,4 closes the valve 23? to: discontinue supply of suction to the; .heads 4,.'the 31111261 is'concurrently moved, in: clockWisedireetion-from. the full` line: to dott-ed line-position. Fig.; 14, to engage arm-v 208' and,` rotateshaft |16 in clockwise direction,I Fig..l 14, so to effect disengagement of the clutch members |411, |49fand to'maintain-` them disengaged so long as valve'v 23 is closed'. When arm 201 isreturned to the fulli line position, Fig'. 14,. concurrently with manual reopening of valve 23 the 'spring |15A, Fig.v 11`, effects 're-engagement of clutchv members |41. v| Min. the feed-roll drive..

The mechanismfor. actuating the knives, -I I2 andthe rockazble supports |06 for the upper feed. rolls |03J includes, Figs:1'1v and 18, the arm- 2|6 which supports the' cam followers or `rolls" 2H.. 2 I2v forengagement with rotatable cams'229, 22 9A: and 238 hereinafter-"described: From;m1112101y lil - there extends the'rod 213, the upper end thereof.;

slidably passing'throughpivoted' post' 28| and` attached tothe link member'2l4. pivotally connectedto arm 21| S'attached to one end of a shaft 2| 6 rotatably supportedby side" frame- 1 ofthe machine andv to the 'otherfend `o'fvvhich. is' secured 1 the groovea driving member z+1. when me ma bing unit or bridge 92'i's's'wung from theposition shown in Fig; fi'intooperati'ng' position, the tongue 1 or driven member 2|8ffextendingfrom the gear". segment 2 9 attachedtdfshaft |01 is" received by the groove offinem/ber'Zl'T, Fig. v17', so'that angular movements of arm 2m, veffected by its actuating cams and'it'sbi'asingspring 2|3Ag'are transmitted to shaft |01 to' move theupper feed'roll |03'to-f ward' and 'from the lower'feed roll as above de- 1 scribed. W The gear segment 2te, Fig.: 6; islin mesh with gear segmentv 2 20 i' attached 4 to knife-actuatingv 1 shaft I'H so that' `movement-of arm 2| U, Fig. 17,? concurrently effects movement 'of the blades I I2 and of the supports-|06f'the upper feed rolls |03. Tljie'handle 22|' extending from the gear segment' 2201-permits'the tongi1e-2|8 to be manually moved vinto alignr'nentwith vthe'grooia/e in 45 member 2|1` as orv beforetlie'bridge is swung" into its' operating, position.

The mechanism foreil'ecting' operation of arm 2|0 to determinefthesi'ze and position of tabs is shown` 'in"ligs,'lf7,"l8. and 1,9. To the shaft 2'22 which makes lone revolution'forl each cycle of the machine, are'attach'ed/the collars 223,224 thread` ably receivingy the clamping screws 225, 226' of the timing disks 221, 228 of substantially identical construction;,foruexamplecam 221 is provided with @but'portionLv adapted. to, be, engaged .and clamped vbv,A s ,crevv 225 and Ya disc. portion upon which. is lpivotally, mountedca'm .member y229 f or engaging roller 2| Iy of armQZlU. Cam1228, rotat-v ing with timingdisk. 221, determines, the. position. and length of vtherear tabs. RT, Figs. land 16,. and cani 229A, attached-to the timing disk 228, determines the location andlengthsof the forward tabsE appliedto. ayzranper. 'Thev timesv in the cycleof the machinaal'. which these cams are` effective to .displace arm2|0 aredependent upon the. angulargrelations betweenk the timing disks 221,` 22a anatheshaft 222;-1-.he length of thetabs y cut from` strips;4 TS is determinedby the setting of abutment 230crarriedby the stationary sleeve 23| which encirclesj shaft 222v and Whose position may be varied by adjustment .of arm. 23.2 whichmayj'beclamped in' desired' position asv by the clamping bolt 233; which passes through.;

the arm 232 and the slot 234;.in the bracket23-"z-l extendingfdownwardly fromhousing 236. Access; to clamping screws1225 and y226 for adjustment`r vThe knives and feed rolls ofthe tabbing heads y ma/also be controlled .to provide intermediate or long tabs IT, .Figs..16 and 16A, by provision of anothertiming disk assembly; 231, similar in construction Vto vassemblies 221,1 228, including the pivotally mounted cam 238 for engagement withe roll 242; carried by. arm 2 I0; The timing disk assembly 231 isA releasably locked to shaft 222 in desired angular relation with respect thereto and' to timing' cam assemblies 221,. 228 `by pin 239 Whichgforced radially of shaft 222 into engagement with the collar of camv assemblyy 231 when' screw 240- is tightened to effect movement of the taperedpin 24| inwardly from the end of shaft 222. The length of the tabs IT is'variable by ad- I justment of arm1242 releasably secured as by bolt 243 Vtothe. flange 244 of housing 236 and having at itsupper end astationary sleeve portion which y encircles the shaft 222: and from .which projects an abutment or operating fmember, similar to abutment 230, engaged by cam member 238 dur-f ing rotation thereof For each revolution of shaft 272-2', cam 238 displaces arm 2 I0 from the position shownfin, Fig. A177 fora fraction of thev revolution determined by the setting or position of the lever= rllhe settings of arms 232,242 and'the angular- .settings with `respect. to shaft 222 .of the timing assemblies'ZZ'l, 228 and 231 determine the lengths of and the spacings between the tabs in the direcupon the sleeved membersv 241, 248, the former keyed or otherwise suitably laittached to shaft 222 and thelatter secured to. theif'orrnerfin de.:y sired angular relation, asbycIamping bolt. 24S: whicnpasses through. an elongated arcuate slot-in. y member 248 into4 a. tapped-hole in. member `241.- Whenduringa revolution of -shaft.-222, cam 2.46,- engages lever 2&0 thelatter isswung in counter--V clockwise directionabout itsfixedA pivot. 25|, Fig..y

5, to` effect .engagement of` clutch member 2.52, slidable alongand keyed toshaft`254, .with clutch memberA 25.3 attachedto gear 255 loose upon shaft.

254 and continuously.. driven from `gear |29 through a train 'including' gears |28, |21 and 256.

Engagement of the .clutch members. 252, v253 efr.. l fects' movement'of' the conveyor drive roll 251;l through shaft 254, gearf258A attached thereto,v gear 259Which is looseon shaft |1A, and gear 260, attached yto theshaft of the drveroll 251. When.

subsequently in the cycle of 'the' machine, cam 245' engages lever'25iLitis rockedinbclockwise direction to effect disengagement of clutch Amembers 252, 253 and' so interrupty rotation vof drive roll,

v v Thev extentl to which the: y wrappers'are advanced by conveyor Cfor eachv 251 of conveyore C.

cycle of the. machine is adjustableA by change in the aforesaid angular relation'between the camsE As exemplary'of. azpreferred cycle of operation.r

reference is madeto Fig. v21, a self-explanatory diagram Which-shows the `timing of conveyorC acca-'oar 1 and other significant elements of'the wrapper-- coating and tab-applying mechanism herein described.1l l Because the cams which control the starting andstopping fof' conveyor C, the feeding of tabs,` and the feedin'gof wrappers are vallori the l common one-cycle shaft 222,there is rio possibility l their timing relations' will -vary because o f lost' motion or backlash and so undesirably alter the dimensions or locations of thetabs on the wrap- PETS. i

yWhen the bridge 92 `is in operatingriposition,"

Fig.'l 1, the coated distributing roll |04` of the tabbing' unit is immediately adjacent the coated distributing roll The adhesive on roll HMfor application tothe tabs is preferably tackier than the adhesive on roll I for application to the wrappers; this result is obtained with the arrangement shownin Fig. 1 by heating the tabbing adhesive in pan |39 from orby the wrapperadhesive in -pa'n HSA.' The latterpan is in turn supported heated to suitable temperature by electricheater 262'which extends through the water-pan 265.

"During `normal operation 'of themachine, hot

gluefrom pan |39A is pumped therefrom at suit-' able rate, as by the valveless pump disclosed in aforesaid Rider Patent y1 .857,260, 'to A maintain the fountain of adhesive 263 between roll and the doctor roll 26.4 Whichfis adjustable to predeter-` mine 'the thickness ofg the coating `of ,adhesivev transferred by roll I onto the wrappers. `The exj cess adhesive removed from the ends of roll |`by scrapers`282 is directed `by them into pan `or reservoir |139 to serve as the cooler tabbing adhesive'fed todistributor roll |04 by'agitator roll' |31. Scrapers 2||3jat the endsof rolls |04, `|31 return excess tabbing adhesive to reservoir |39.`

' When it is desired, as at the end of adays to clean the adhesive-coated rolls andjthe stripping knives 2, i9. the pansl |39,` |39A and 265 are loweredbyreleasing latch 266',`Fig. 1, whichnormally holds themin raised position by locking theparallel-motion linkage comprising levers 261,263

and link 269 in the position shown in Fig. 1;'the two glue pans |39, |39A are then retractedY from beneath theglue rolls by operation of crank 210 whose' shaft 21| threadably. engages the rear wall of the Water pan 265. Valve` 212 is then opened to'allo'w flow of cleansing fluid,y water, through inlet pipe 213 and heat-exchange coil 214 to the spray-pipe 215`extending between the sidefijames 1, 1 of the machine andhaving orifices for directing a multitude of jets, Fig. 8, into the bight of rolls |04, |31 which continue to rotate during their cleaning. The used `Wash water falls `into the pan 265 having a drain spigotv or plug, notshown. To clean the` rolls and .264, the valve 216fis opened to supply heated water to nozzle 211 at the end of flexible hose 218 manipulated by the operator after removal from clip 219. The

excessl or used Wash water from these `rolls also rolls relatively` toward' eachv other concurrently to engage 'opposite faces of a'tab, 'and fdr'iviri'g* meansfor' effecting rotation of said ro'llsgffan'd? means responsive 'to yfailure vof said first-named means'to-.feed a 'wrapper temporarily to vdisablev saidfdrivi'ng means to preclude feed of a tab whenv said intermittent means moves'said rolls into'en-"f sagement therewith. `2'. TApparatusfoiiiaipplyirig' tabs to wrappers comprising-suction means'forA engaging wrappersr to 'be tabbed', means for feeding tabs for application l t'o: the-wrappers, and pressure-responsive meansfefiective upon non-engagement of a wrap# pe"bysaid suction means or'upon'failureof the? source of `suction to prevent feed of tabs by saidr feeding means.

3;'Apparatus` for applying tabs to Wrappers cofiriprising` tab-feeding means' including KIfeed` rolls, driving 4means therefor, 'a'clutchlbetween said driving mea-'ns and said feed rolls comprising 'disengageable clutch members normally c'oiitinuously engaged to effect lcontinuous rotation' of *said feedffrolls,- wrapper-feeding mechanism,

and meansA for effecting'"disengagementV of said clutcl'i""me'r'nbers responsive to' failure mechanismfto feed a Wrapper.

4. Apparatus for applying'adhesive-coated tabs to wrappers comprising a conveyor,` an adhesive-v coated" memberjmeans including` said member" for feeding ftabsa'nd wrappers to said"conveyor',

and 'niear'isv responsive to'fa'ilure of fee'dof a wrapper 'to vsaidl member for precludingfdelivery' of coatedV tabsalone to said member in avoidance'of fouling of the conveyor bythe coated tabs.

5f. vApparatus for applying adhesive-coatedtabs to wrappers comprising a conveyor, an adhesivecoated"roll, mechanismv for feeding wrappers'to said roll,v mechanism for feeding tabs to `said roll,

means fordiverting coated tabs and wrappers, from said roll onto said conveyoryand means io 1 I preventing delivery of coated tabs, without wrappers, to s aidfconveyor comprising means for pre-' cluding 'operation of said second-married mecha-" nism in response tio failure of saidrst-named l' mechanism tofeed a Wrapper.

6. A ppalratusfor applying tabs comprising a tabbing head having'at' least one rockshaftIstaf tionarystructure, means for operating sailrciclr-V shaft 'including an oscillatable clutch member' supported bysaid'stationary structure, structure' carryingsaid tabbing head movable with'rfesr'iectv to said 'stationarystructura anda clutch member `rriovablewith said movable structure which' by movement'in one direction effectserigage-I meritof f s'aicl Iclutch members for operation of said rockshaftby said operating means and which by movement in another direction effects disengagement of lsa-id clutch members and affords access'to said tabbing head. 71 Apparatus for applying tabs comprising separable-feed rolls intermittently engaging a stripA of tab vmaterial to advance it in one directionf' and means preventingmovement of said strip/in,

reverse direction when said rolls are separated comprising a movable member biased tojmove` in vsaid -reverse direction, and stationary lstructure dening'a convergent `aperture 'limitingL movement of said memberl in said reverse direction and forcing it againstsaid strip.

8. Tabbing apparatus comprising an 'adhesivecoatedA roll, structure for supportingsaidA roll, al transfer roll for transporting tabs .to said iad-` hesive-coated roll, and asupport yfor said't'ransfferroll 'mounted for movementwith respect. tq.

saidst'ructure to affordv access to said r0`11S-"v of said 9; -Tabbing apparatuscomprisingan adhesivee'f coated roll, structure `for supporting said roll, ai transfer roll for receiving tabs, stripper members: for `delecting the tabs from. said.transfer roll.r

ontosaid adhesive-coatedroll-,- and a supportfor` said' transfer vroll and; saidl stripper' `members* mounted for movement With'respect to said struca transfer roll for receiving tabs from said lmech-e anism, stripper members for deecting the tabs from said transfer roll onto said coated roll, and a common support for said mechanism,.said stripper members and said transfer roll mounted for movement with respect to said4 structure toafford access to said rolls, said stripper mem-f. bers and said mechanism. Y .I Y

12. Apparatus for tabbing Wrappers comprising means intermittently operable to feed wrappers, means intermittently operableto feed tabs for. engagement rwith ,the Wrappers, .aY member controlling the timing of the operations Aof said wrapper-feeding means, a member controlling the timing of the operationsofsaid. tab-feedingy means,` and movable structure ,supporting said timing members ,for movement in unison in avoidance .of mistiming betweenl said wrapperfeeding means and said tab-feeding means.

13. Apparatus for tabbing wrappers.compris-1 ingmeans intermittently operable to-feed Wrappers, means intermittently operable .to detach tabs fromstrip materialfor delivery intoengagement-With said wrappers,l a member .controlling the timing. of the operations of said yWrapperfeeding means, a member controlling the timing of the operations of said. tab-.detaching means, and movable structure supporting saidtiming members for movement in unison. .avoidance of mistimingV between' said *wrapper-feeding.

means. and said tab-detaching means.

' 14. 'Apparatus for tabbing Wrappers compris.-` ingmeans intermittently operable to feed lWrappers means intermittently operable to feed a. strip f tabbing material, meansiinterznittently operableto sever said strip to. detachtabs there from for delivery into engagement with. said.. Wrappers, members for timing, the operations of said wrapper-feeding means, said strip-feeding. means and said strip-severing means, and. mov- 1 able structure supporting saidtiming members for movement in unison inavoidance otmistim-v 1ng y 15.l Tabbing apparatus comprising- `a conveyor, means operable toY feed a stripoftabbing mate-l.l rialme ans operable to sever saidstripto detachv therefrom tabs. received by. saidconveyor, a onecycle shaft, and means for controlling. the timing of the operation of. said .conveyor. .of.-;said strip-feeding means. and. of vsaid strip-severing means comprising members mounted upon. said shaft for movementin unisom. 16. Wrapper tabbing mechanism comprising means for feeding a strip `of tabfmaterial, l.means for severing said strip oftab material, means for` feeding. a wrapper,. meansH for operating. said strip-feeding means` and said strip-severing# means to provide tabs applied to-thelead-ing Vand trailing portions vof saidy Wrapper during feed thereof," and means for operating said-stripeeding means and said strip-severing means to pro' vide atab applied to the Wrapper during itsffeed leading andk trailinglportions eration. of said feeding means, rotatable mem-f' bers, arcuate cam members respectively pivoted toV saidrotatable members `sequentially to engage said structure, and an abutment supportingsaidl camfmem'bers for part of veacln'revolution of said rotatable members to determine the extentsot-- theperiods during'which. vsaid cam members.

maintain. said structure in said position- 18.V Tabbingapparatus comprisingmeansopf,r erable to -feed a strip oaf 4tabbing material, struof;

ture operable to sever the strip yto detach tabs from thestrip, structuremovableto control'facei tuation of said, strip-feedingmeans and ofsaid severing structure, .rotatable members-arcuate cam members. respectively pivoted to said rotat-r able members sequentially to engage said control structure, `and an abutment for supporting saidtabs therefronr, structure'movable to control the operationv of. said means, members. rotatable about a common axis, arcuate cam members re,`

spectivelyl pivoted to' said rotatable members sequentially to engage said control structure, and an. abutment for supporting said camfmem.-

vbers for part of each revolution of said rotatable `members and adjustable angularly about said axis concurrently to varythe: lengths of tabs successively detached fromsaid strips,

Y2 0. Tabbingapparatus .comprising a pair of feed rolls on opposite sides of a strip of. tabfbing.

material, means interr'nittently operableto effect relative movement of said rolls toward vand from clamping engagement with said strip, and a plu1- rality of means respectivelyindividual to said rolls continuously to drive them independently of each other in avoidance of differences between. extents of strip fed for ysuccessive operations of said intermittently operable means.

2l'. Tabbing apparatus'` comprisingan adhesive-coated roll, stationary structure for support?4 ing said roll, a transfer roll for'transporting'tabs to said adhesive-coated roll, athird roll for 'sup'-Y plyingadhesives to said'- transfer roll, a common support '.for said transfer andI supply rolls mounted for movement with respect'to'said structure movable away from operative position to another position for access to said rolls, and a spray head-f er supported by said Astationary structure disposed to direct jets of cleaning liquid into thel bight of said transfer and third rolls when their said common support isin said operative posi-- 22. A machine for applyingft'abs towrappers comprising a member operable in each cycle of the machine to engage and hold the end. Wrapof said machine to engage or hold a wrapper .ef-

comprising means ope y fective to disable said tab-feeding means at least until said member again engages and holds a wrapper.

23. A machine for applying tabs to wrappers comprising tab-feeding means, driving means therefor, a clutch between said driving means and said tab-feeding means including disengageable members, wrapper feeding means including structure movable from and toward engagement with the end wrapper of a stack and a member movable in unison therewith, and means for effecting relative movementI of said disengageable members comprising a second member movable into the path of said flrst member upon failure of said structure to engage a wrapper.

24. A machine for applying tabs to wrappers comprising tab-feeding means, mechanism including disengageable clutch members for effecting operation off said tab-feeding means, wrapper-feeding means including structure movable cyclically toward and from engagement With the end wrapper of a stack, mechanism operative in each cycle of said structure to effect disengagement of said clutch members in event of failure of said structure to engage a wrapper, and mechanism operative in each cycle of said structure to effect re-engagement of said clutch members in anticipiation of engagement by said structure with a, Wrapper in its next cycle.

25. Wrapper tabbing and coating comprising a roll for applying heated liquid-adhesive to wrappers and to the box-engaging faces of tabs on the Wrappers, a second roll for applying adhesive to the Wrapper-engaging faces of the tabs, and means for supplying to said second roll liquidadhesive which is cooler than the adhesive supplied to the first-named roll comprising means for collecting excess adhesive at the end of said first-named roll, and means for distributing aforesaid collected adhesive on the surface of said second roll.

26. Apparatus for applying adhesive to sheets comprising, in combination with a, sheet-coating mechanism including a sheet-engaging roll and a roll for transferring adhesive to said sheetengaging roll, a system for supplying adhesive to said transfer roll comprising a container for the adhesive supplied to said transfer roll, a container for liquid in contact withrst-named container transmitting heat to the adhesive in said firstnamed container, means for heating said liquid, a spray head adjacent and for delivering cleansing fluid to said sheet-engaging and adhesive transfer rolls, means for delivering cleansing fluid to said spray head, and means for heating said cleansing fluid associated with said liquid heating means.

THEODORE A. FEDERWITZ. HANS GROTEWOLD.

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