US2638821A

US2638821A - Blank forming press feed

Info

Publication number: US2638821A
Application number: US173409A
Authority: US
Inventors: John R Baumgartner
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-07-12
Filing date: 1950-07-12
Publication date: 1953-05-19
Anticipated expiration: 1970-05-19

Description

4 Sheets-Sheet l May 19, 1953 ,1. R. BAUMGARTNER BLANK FORMING PRESS FEED Filed July 12, 195o J. R. BAUMGARTNER BLANK FORMING PRESS FEED May 19, 1953 4 Sheets-Sheet 2 Filed July 12. 195o 'I'l'l'lmnllllhllln mw, \I hilhllull/ nl sa wwwa@ @zFza May 19, 1953 J. R. BAUMGARTNER v 2,638,821

BLANK FORMING PRESS FEED Filed July l2, 1950 4 Sheets-Sheet 4 Patented May 19, M1953 UNITED)` STATES PATENT OFFICE y V 2,638,821 l BLANK'FORMING PRESS raso John Baumgartner, Milwaukee, Apblicationiulyiz, 195o, serial No. 173,409`

, Claims. 1

The invention relates to box` or'carton blank forming machines.

The general object 'of the invention isvto p rovide a machine of the character described in which a` web of paperis intermittently fed into and out of`a creasing and cutting or blank formingpress from a pair of intermittently active feed rolls to which the paper is `supplied by continuously active metering lfeed rolls, with means for creating a definitely controlled loop in the paper web between said sets of rolls during the cutting operation of the press. f

A further object of the invention is to provide certain improvements over the structure shown and `described in my lcopending application Serial No; 121,725, filed October 17, (1949, for Carton Blank Forming Machines, among which are an improved means for controlling 'theformation of the loop in the paper, an improved brake means to arrest the travelpf the web during ,the cutting operation, and improved means for control# ling the operation of the intermittently `active feed rolls at definite predeterminedl intervals even though the thickness of the web varies.

A further object of the invention is to provide a press which maybe readily connected to a print-v ing press forcontinuously printing the web before its passage'to the blanking press. 1

The invention further consists in `the `several features hereinafter set forth and more `par-y ticularly dened by claims at the conclusion` hereof. 1

In the drawings:

Fig. 1 is a side elevation view of apparatus ems bodying the invention;

Fig. 2 is a plan View of the apparatus, parts being broken away; i,

Fig. 3 is a detailed vertical sectional View taken ontheline 3,-3 of.Fig.1;

Fig. 4 is a detailed vertical :sectional view taken ontheline4-4ofFig.'1`; o

Fig. 5 is a detailed vertical sectional view taken on theline l5---5 Aof,` Fig. l,`parts being-broken' away;

on the line 6 6 of Fig. 6; .l

Fig. is a detailed -vertical sectional View through a part of the .mechanism controlling the intermittently operated feed rolls;

Fig. 9 is a detailed vertical sectiona.1 `viewtaken` on the line 9-9'of Fig.' 2. i I

Referring to the drawings, thenumeral I0,`

designates a `base:` frame, structure on `which housings II and I2 and spaced uprights I3 are Fig. 6 is a'detailedvertical sectional viewtaken;

, f 2 mounted. The press itself includes a xed platen I4 carried by the uprightsfIS and a movable platen I5 slidably` mounted on` said uprights. One ofthe platens I4 or I5 carries the cutting and creasing dies while the other carries a base plate, `these parts being indicatedby thehumeralsIB'and Il.' `Brackets I8 mounted at one side of'the platen facilitate introduction. and `re` moval of the parts IE and IT. l lReferring to Figs 1, 2 and 3, thev movable platen I5 is reciprocated by twov sets of eccentrically driven) connecting rods I9, there being two rods in each set; journalled at their upper en ds on shafts 20 carried by the platen and mounted at their lower ends on eccentrics 2I mounted in spacedrelation onspacedshaftsfZZ which are drivingly connected together by one to one gears 23 and 24. `The left hand shaft 22, or main drive shaft of the machine, carries a pulley 25 connected by belts 26 with a pulley 21 on the shaft of an electric drive motor 28 mounted inthe base of the machine.

Referring to Figs.v1 and 2, at theentrance end of the" machine, the web "W ofcarton stock is led overa convexly curved plate or bed 29 which actsto stiifennthe web so that it may be efficiently guided betweenthe laterally adjustable guide members' 30^ Whichare suitably mounted for movement toward or away from each other on a `screw shaft 3| journalled in the sides of the frame and carrying an operating crank 32. l `After'being properly` laterally alined, the web is "threaded through a set of three rolls!I 33, 34, and 35 which are continuously driven metering l rolls and then passes through loop` forming` mechanism, pastbraking mechanism to the in# termittently activefeed rolls 36'and 31 by which it is fedin between the platens 'off the press. Re` ferring` to Figs. 2, 4 and8, the roll 33 is continu'- ouslydrven from the shaft 38 for the roll 36, but at half the speed of theroll, through a gear drive` I connection Y'therewith comprising a bevel gear 33 on said shaft meshing Withi a similar gear cna torque tube shaft 40 which at its other end carries a-bevel `gear '4I meshing with a larger` gear42 on the shaft `43 of the roll 33 which also carries a gear 44 meshing with a -gear 45 on the shaft 46 of the roller 34, which gear 45 `also. meshes with agear 4'1` on the shaft 43 of the roller35.

The shaft 46 ofY the roller 34 is jowrnalled in spaced arms 49 mounted for swinging move- 1nen tat,;50 onA the frame ofwthei machine and limited in its. upper ,swing` bythe roller; 34 and V ingits, lower` swing by` engagement with a stop pin 5I xed in each side of the frame. To allow free swinging movement of the roller 34, its weight is counterweighted by a spring 52 in a bore 53 in each arm, as shown in Fig. 9, interposed between an adjustable threaded plug 54 and a plunger or pin 55 adapted to engage the stop pin I.

The shaft 48 of the roller 35 is mounted in the outer ends of arms 56 carried by an oscillatory shaft 5,1 journalled in the frame and carrying a crank arm 58j? which isv operated upon by a spring' loaded' plunger 59` similar in all respects to the plunger 59a, shown in Fig. 6,`

urged outwardly by a spring 60 mounted in a casing El having a spring loading screw 6% adyjustably mounted in the threaded bore of said casing. As spring loaded plunger 5F- aetsf through the crank 58, shaft. 51,. and arms 58 to swing the roller 35 upwardly, toward the roller 34, this roller 34 in turn will be swung upwardlyi toward the roller 33. The nip or grip of the web. between. these three rolls is adjusted by the pressure or tension placed: ontheloading spring of plunafer58by-itsfadjusting screw..

To prevent a broken web from rolling up onv roll 35, a deflector--plate 63, isv mounted beneath the roll 34 and forv a similar purpose a deector plate .54, not" shown inV Fis. 2; but shown in Fig. 1f, guides; thgeweb` away'v from

therolls

34 and 35 after it leaves; the nip'V between the rolls 34 and-i 33.

For threading the web; through the; rolls- 33, 34 andi 35- an air-operated piston 65 acts on the arm or crank 58 oppositiontothe spring act-l ing on the plunger 59ntoswing the shaft` 5,1.l and arms 5Br countercloelrwisje asviewed-4 in 1 to move the roll` 3.5. downwardly away from the roll 3.4' which; isi then; free; tof` move Cl'Qwllh wardlyi-rorn the roll 33 soi that theserollsI are opened up. The. piston 65 islsimilar-to the. pisf` ton 65a, `shown in Zielig.` 6,.` whichy is*- ope'rated by compressed air from any suitable source and returned by a springclif.'

For controlling the Vforrniatiorr of the: loop L in the. web between the; set ofq'feedrolle. 3f3r and 34 and the set of rolls 3B and 31, upperfapron 61 and' a lower apron; 68j aref provided: Fig; l: showsthe preferred form of-y these.-` anrons; The apron 81, secured toV the!4 sides; of'. the; housing; isk curved orV inclines downwardly from. the rolls 33' 'and' 34' as indicateds atA 59?. and; thenatf Ht extends upwardly to a position adjacent. the'. brake mechanism hereinafter described.. This apron checks lthe upward, swing or: snapV oiithe web vwhen it 'is drawn up from the; loopedy on dottedl line position. shown in its positionr abut-f ting the underside off saidv apron anctV also.. acts: to produce a` drag. due tof' t'rioti'onal'` contactv o1i the paper with it asl the* webI is: fed*` through' the press, which prevents the rolls" 362 and', 3ft overpowering the'r'olls 34E ands35. The. apron; 6.8; mountedi between;l the sides oft the press; extends upwardly Afrom the frame; structure at a point 1I about midway of the loop and: ai?. its` upper end. 12 extends under'y the exit vend oi? the apronr 3.1' and'. slightlyv beyondz said: endf andi cooperatesv therewith?. to form: a relativelyf narrow throat: through:l which thef web.` passes; They apron 68 checks the downward snapf offthe web. The deiiector' S4' acts asf a guidef fron the: web which on leaving the rolls 33 andi 3.4?. isfv fed;v downwardly toward the frame I-ff as' is: apparent from: Fig. 1f.

Referring to Figs; 1=, 2;' 5 and?y 6,-"i'fhef` brake. meohanism` includes an upper brakebarliif fixed? to;` the; sides of4 the housingv` I2 and; a movable brake bar or member 14. A guide pin 15 is fixed to each end of the bar 14 and works in a bushed guide bore 16 in the bar 13. A spring 11 mounted in each end of bar 13 acts to normally urge the bar 14 outwardly or to a release position. Pins 13 are also loosely mounted in guide bores 19 in the bar 13 and engage at one end with the bar 14. At their other ends, the pins, 18 operatively* engage a manually operable osciliatoryshaft] 81% eccentrically mounted at its ends' in the housing Il'l and carrying an operating handle 8| whereby the brake bar 'M may be moved away from the bar 13 for web threading purposes. The bar 14 is also engaged at its ends by screws 32 adjustably mounted i-nthe endsof? spaced resilient crank arms 83 which are carried by an oscillatory shaft 3d, see Fig. 6.

The'shaft 84 carries spaced crank arms 35 in which the shaft 86 of' the feed roller 31 are jou'rnalledf.- Shaftl 86.- carries a gear 81: meshing with a gear 88 on the continuously rotated shadt 3 8y for thef feed: roller 3ii-I which. is mounted bearings.` the housing; I-2f; see Fig.v 4.. The shaft 84 also carries a crank` arml 8e which, as shown invl Fig. 6,. istv engaged.-v by oppositely disposed` loading.T devices. Bhe loading Y device whichl determines; the grippingv pressureA between the: rolls: and 36;, includes theplunger 59a, spring? casingY 6}I,. and. loadY adjusting screw 32' preyiouslyV referred to.. By adjusting the screw 62 relative to; the spring 60, greater or less pressure is;` applied". to thefarm 88: through the.1 plunger'. 59a to cause a: ceunterclockwise swinging` movement ot--theshaft 8.4:,to swing the roll'3z1 towardathe r'o'llr 33` and at the saine time swinging; the arma 8,3 downwardly to-.release-thebrake bar: 1.4; from braking engagement with. the weba The. loading deviceV which actsfony the arm 895150 oppose?l the spring loaded# plunger 59o` and cause: a1. release` of" the roilil 31: tromv feeding enfga'gement with ther webr comprises' a. hydrauln cally operatedv piston, 3ER slidablymounted in an operating', cylinder. St and` yieldingly urged, outwardlyA by: the` ligt-itA pressure off a. spring 92, see. Fig; 6i A: dui tizn'isferlL pipe 93 connectsthe cylinder the cham-:ber 94 orv a` pum-pcylinder 95 imwl'rielr; a. pump plunger 93- isV slidably` mounted, saisir` plunger' being normally urged outwardly by: a' spring 9 erposed between itandi thea pun'incylinder; which hasV a port 98 connected by a pipe 99 with a reservoir IUI! for hydraulic uid, see Figs:` 6` and 7.1 The continuous-1yr rotatedsidrive'fi shaft lcarries a cam IBI which has a high portion, I83e:itendingfalong oneethirdf. orbita periphery andA a low portion extending along the other two-thirds o'iii'ts` pe-y riphery- Tfre cam, IfIlfI.E bears` against; al, roller |03 on the free end of ai leven tappeti. F04 piv ot'alfly` mounteiiiatf mit and4 engaging the outer end-of the plunger 96, thespringSJ?!acting;V to maintain engagement of; the tappet. with the cam; Tha inlet.. 'andfreturn of viiuid= from and to the pipe 99 and reservoir I0!) is contr-olf led by the pump! plirrgen 9.8i which depending upon its position in thecyliirler- II-?eitlier cuts-v oir orl exposes ther. parte' 9B;- EOLr guidingf'the plunger' 98 and. increasing? its seaiing contact with the bore; ci' the. cylinder' the. samei's shown as: prcvidedi w-ithiV aitubul'arextension'. m6 having a port I01ftliereiirc'ooperateswith theiport': 98. Thi'sfextension Iil'couldibe' omitted without changing the co'ntroilingi effect.' off the irl-ungen y mth the ahorreconstruct/foinY during two'etliirdis of a revolution of the drive shaft `22 while `the low portion of the cam IOI is passing the roller |03, the pump plunger 96 is retracted as `shown in Fig. 7 and the port 98 isy alinedwith `the port |01, and under these conditions the operating piston 90 l isiretracted t and the springipressed plunger 59a is acting to lmove the roller 31 upwardly to produce a nipping engagement of the web between

therolls

36 and 31 and the feed of said web to the press, the brake bar 14` being then released. During therother one-third of the -revolution of this shaft 22, while the platen I5 is making its cut, the highpart |02 of the cam IOI forces the plunger 96 downwardly cutting off the port 98 and puttingthe fluid in the chamber 94, pipe 93, and cylinder 9| under pressure which acting on the piston` 90 moves it outwardly and swings the crank arm 89 and shaft 84 counterclockwise overcoming the pressure `of the `loaded plunger 59a and swinging the roll 31 out of gripping `or feeding engagement with `the web and simultaneously acting through theresilient or spring arms `83 `and the screwsw82 to put pressure on `the brake bar 14 and clamp the web between said bar andthe fixed bar 13. Thus through the control of the hydraulic system by the cam IOI, the feedrolls'36 and 31 are .intermittently engaged with theweb `to advance the same during the idle period of thelpress and the brake is engaged with the web during the blanking period of the press. i i

, While the feed rolls 36 `and 31 are engaging the web, if the IJthickness of this web varies, as it `frequently does, on an increase `of thickness of the web acting through the roll 31, crank `89 and shaft 84 on the arms 85 `tending to swing the same counterclockwise, the piston 90 moves outwardly under the action of its spring 92, and more fluid is free to enter the hydraulicsystem through the port 98, so that no matter` what thickness the web is at the time the roller |03 passes from the low part` to the high part of the cam, the piston 90 will be in contact with the crank arm` 89 andbe instantly available to shift the roll 31 to a `release `position relative to the web. This action would not be possible were the arm 89 moved directly by the cam |01. i

In order to vary the length of "feed of theweb to accommodate varyingilengths of cartons, the speed of the feed rolls-are varied relative to'the speed of the shaft 22 through a drive between the roll 36 and the shaft 22.` As shown in Figs. 1 to 4, the shaft 38 of the roll 36 carries a sprocket |08 connected by a chain |09 `with a` sprocket H on a lay shaft m which carries algear I l2 meshing with a gear H3 on a shaft II4 which carries a change gear/,I'I meshingwith an idler gear `I I6 that also mesheswith a changegear ||1 on the drive shaft 22; The stud IshaftA for the idlergear ||1 is carried on the free' ends of arms II8 and I I9 at their point of connection with each other, the other ends of said arms being pivotally connected at |20 and |21, respectively, with the frame of the machine, the arm ||8 being slotted at |22 to permit angular adjustment of these arms relative to each other, so that the idler gear ||1 may be meshed with different ratios of change gears II and ||1. By substituting different ratios of change gears II5 and I I1 the speed of the roll 36 and consequently the roll 33 may be varied to vary the amount of web fed to the press during each rotation of the shaft 22. The gears I5 and I I1 are quick change gears. If desired, the gears ||2 and ||3 may be also change gears of definite fixed ratios.

`Because of the ability to' change the speed :of the feed without changing `the speed of the drive shaft 22, this pressmay bedirect connected to any suitable rotary printing` press, `and the plate cylinder of this press be driven from the shaft 22, andfor this purpose, as shown in Figs. 2 and 3, the shaft 22 carriesa spiral gear I23Jmeshing in one to one ratio with a spiral gear |24 mounted i Referring to Figs. l and 2, ,a feed lscrew `|30 is` journalled inthe housing |2 `and carries a hand crank I3| `and has `side web guide plates I 32 `mounted thereon, movable toward. or away from each other to adjustforthe varying widths of web, this guide being f disposed between the brake and the feed rolls 36 and 31.

To summarize the operation of the apparatus, theweb as it enters the `press isguided in its desired` lateral position by adjustment of the guide members 30, andfwitl'l` the

rollers

33, 34 and 35 in opened or spaced condition due to the operation of the air piston 65, vthe webis threaded around and between these cylinders and then through thelooping space between the

aprons

61 and 68, then between the brake members 13 and 14 between the guide plates |32 and between the

feed rollers

36 and 31, then in an open position due to the operation of the` air piston 65a, and then through the space between the `platens I4 and I5, suicient stock of theweb having been left in this threading operationV to form a loop such" as the Qloop shown in dotted lines in Fig. 1. The motor 28 is then` started whichputsthe shaft 22 `an`d`the`va`rious drive connections associated therewith `in motion`,`thus` positively driving thedraw or feed rolls 33, 34 and 35 and the feed rolls 36 and 31,i`t being assumed that at this point thesefeed rolls are driving and carrying theweblthrough the press land takingupthe slackformedby the loopl to bring` the vweb to its upper `position shown in Fig. 1, at which time thefeedroll 31 is movedout of feeding relation wi-th the roll 36," the brake bar 14 `is moved into operative relation" with the bar 13 `to grip the web, and the `platen I5 is making its cutting and cr' `easing`` stroke. While",the web is being ,held byftl'ie brake, the rolls 33.34 and 35 are operating"`to` supply more-"ofthe web to form.` al new loop between the aprons61 and 68, and as soon as the press has retracted the platen I5 suflciently to let the web pass through, the cam IOI running on its low side acts on the actuating mechanism previously described to permit the spring pressed plunger 51a to shift the feed roll 31 into driving relation with the web and the roll 36 and to release the brake bar 13 for another feed of the webl in between and through the platens of the press While taking up the loop. This cycle repeats itself, the feed rolls each time feeding so much of the web ashconstitutes the length of any one blank to be formed, which blank may or may not have printed indicia thereon depending onprevious treatment of the web.

I 'desire .it tovl be.' understood that Athis invention is' not to be limited" to; any particular form ,or aiirangementof: parts. except in.so1 far as suchv limitations are. included: in the claims'.

WhatfI claimasimy'invention is:

1;. The combination withv ai creasing and blank iormingr presa'. of; mechanism for feedingV a-f pre.- detemiinedv length onpaper` 4web to` said press corilprising,y aset .ofcontinuously activeitfeb feed-.- ing metering` rolls andt a-f set of intermittently active iii/'elofeeding. rolls, means for.` driving said inteimitteiitiy attiiferoiis-.at amener.- speedthan said continuously' active-rolls', means for rendering lsaid?" intermittently 'active feed rolls Vinactive while" al loop is`- bdiit'upjin the Webbetween said: sets of'reils; means for positiveiyfdrivingthe reus of eaclL set at predetermined speeds; an upper apron anda lower apron 'in which the loop is biiiitfupand by which its upio'eraiid lower movements are controlled, said continuously active metering rolls having their bite positioned to normally direct the webL downwardly and toward th bottom portion o fffsaid lower apron, said lower ap ny extending upwardlyt'o a' positionadjacent the" upper apronj at; the end or thev loop which is adjacent said vinteri'n itt'entlyactivej web feeding rolls, the upper` 2113110.11.. being downwardly inclined intermediate its' ,ends and .engaging the; upper surface oi thje vg/ eb'btjweensaijdj setsjoil rolls and disposed' below a straightriineextending between the nips'ofbothsets of' rolls and creating a frictiorlaldi'ag. on' theweb between said Sets of rolls when the loop is taken up'.

2; The corribiiiationwitha creasing and blank forming p1jess`, of mechanism foneeding a predetermined lerigth of paper web `to said press comprising' a set of web .feeding fils; .means for continuouslydriv n'g .said rolls' vt-l'iileV engagedv with l a :dov support' f 'oroile oflsaidrolls, d cainmeans acting for a' predetermined periodgduringa revolution of said rolls., a hvdrau'1'ic-system.,feminisme a Dump hav.- ing a plunger operatively coiinectdto .said cam;y a .conduitfora Source of: hydraulic. 'u'ild connectdf'tothe. pump and having. aport controlled by Said. plunger, an. operating .pistonan'd' .its cylinder in;circuitV with said. pump and 4operable by iiuidfdispia'ced by saldi plunger' and. operatively oniettedltc saidsupportto more the same dur.- ing the predetermined,perioddetermined by said carni means so as to renderthe rolls inactive vto feedv the web during. period, thje cylinder for said op'4 ating piston being connected with said source when' said cainkifs inactivety The structure as` denedin; claim 2 wherein the operatinf,7N pisteitworksini a cylinder having ariopen'pipe'.connection' with the pump cylin-- der which". is in.' communication withv said source when said port is open.

4; TheV combination'. with: .a creasing: and .blank forming.Dress,` of mechanism for' controlling the feediof a web; of carton. stockiin predetermined lengths to1 .said p1:e`ss.co`mprising a brake means including. a incivablebrake memberxand a feed meansgcomprisingla pair .of rolls, one .of which ismovabletoward-and away from the ,other roll, means for, ccmtinuouslyl driving. said rollswhile .engaging the Web-,..arr,.osci1latory shaft,. crank means., directly; connectingv thel movable-L member 'of tl'ie` brake.: and; the. movable .feed roll with said shaft, an;v operating` cranltconnected; with said shaft,. anidf adjustable spring.v .loading means norv maily .acting on said; operating cran-k toi turn said. sh'aitv to. bring. saidil vmovable .roll into web feedingrelation with its companion roll ata predetermined; pressure, and press-,timed means acting... on ...said operating: crank. during. a. denite predetermined period; during` the .revolution of saldi feed rolls` to open said. rolls and apply said brkel..

5. The; combination; with acreasing.; and-.blank forming; press, of mechanism .for feeding apren determined' length; of paper ,web .to saldi. press comprising.. a setiof webfeedin'grolis, means for continuously driviniasaid rolls. while engaged'withl the' web', a movablesupport for one ,ofi sadrollsg means for miovingsaid support to. brings'ai'd rolls into;v feeding relatiorrwith. the: web', rotatable press-timedy carri'x meansf. acting for. a'. predette-- mined period, and hydraulically operated means controlled .by saidtcan means and including a piston s`hift`alo1e with: said support anda constant stroke' pump to: compensate for varying. thicknesse'sof the web for nioving said support a prdeterminedv distance regardless of" varyng thciinesses of tjiie web peni-g iedbetween saierioiis to'v ieiiiiei;` said tous inactive to ieedthe web for the predetermined period Adetermined by said cani" means.

JOHN R. BAUMGARTNER,

Referenties citeiriii the nieof this patent