US2008645A - Paper cutting and trimming machine and the like - Google Patents

Description

E. L. MUELLER July 16, 135' PAPER CUTTING AND TRIMMING MACHINE AND THE LIKE Filed Sept. 22, 1931 "WW Hilllm HIHHII- INVENTOR Em z'Z LMzwZZam n/ 11:,5 ATTORN Patented July 16, 1935 a 2,008,645

7 1 I 2 ,008,645 PAPER CUTTING AND 'llRIMMING' MACHINE ND KE Y.

Emil L. Mueller, Rutherford; N. J; Application swabs 22,1931, Serial No; 564,378

4- Claims. (Chloe-58)- ,,,This invention relates to: an improvementin 3 is adtransverse detail sectional viewupon paper cutting andrtrimmingzmachines andlth'e theplane.of'lineI1IIII of Fig. 1, and like an'd. its objectisto provider means; t tfacili- I Fig. 4: is-a similar sectional view upon the plane tate: the easy: and; convenient: attachment and i e Of 5 removal of the cutting blade or knife ot'such Referring toctheydrawing for describing in 5 machinesn r r detaihthe exemplary structure illustrated-therein; -;,The cutting blades or'knives. 0t machines or thereference character L. indicates generally the thi type usually; y h d unwieldy frame work of a paper cutting machine. The and the vextreme keenness-of their cutting edge bedplate of themachine. isindicated by the refrenders; them dangerous and difficult: to handle erence character G. ,v 101 especially'irrgettingthemlintoleandfloutgofjoperas Vertically slidablezwithin the frame L is; the live position within'ithe machine, itbeingus'ually usual clamp bar H and knife' arryi bar A, h e necessary to employ thesemlices of two orimore partslbeingf operated inappropriate manner' as men; to perform operation. even i11 machines is customary w t h ac nes, as for instanc 1'5 of only, moderate-size. It. is accordingly'a; purby means at the links -,I- and 2'2 shown in 1-5;

pose of the present invention: to. provide. means thel-drawingsas being connected respectively with to simplify and expedite: this: operati.on..ziv .4 the clampbar' and-with the knife carryingbar,

more; specific object is to providevmeans it being understood of cou-rsethat these links exwhereby. the knife may be temporafi-Jysuppnrted tend downwardly intoconnection with suitable 20. during the timeiwhile itsretainingboltsare being mechanism not illustrated but which'isr usually removed or replaced, as wellzascduring thetime footcontrolledso that the operator hasinstant while the knife is being; moved or adiustedinto control: of the independent movements; of the a position wherefrom it canbereadihrliftedlcut clamp 'bar and of theknifecarrying bar, all as is of the machine, orxduringt the. time-while the welltkn'own in machines of this type. g

knife is being 'movedvor adiusted back again into i The knife-bladeis indicated by the reference 25 position for the insertion; ofth'e holding bolts; 5 character 3;. Itisformedseparate from the'knife I A fril s-ether detailedvob-ject is;v to provide means carrying-bar A andin use is held rigidly conto facilitate the'making of tne-nneadiustments; n cted with h bar. A- y m a s f a s ries .of bothverticallyandhorizontally, whichiarezusually bolts which extend: through apertur'esi of 3Q required. to bring-the knite-intoposition for res the banAhand engage within threaded openings 3a fifii' i h l gfbei 't vi V 1 a 1' Ofzthe knife: 7 u r further-detailed obiecttis to provide a: sepa- H In" attaching the knife carrying bar A it-is of lately formed. attachment readily attachableasto ,cou-rse. necessary; to first move the knife into or detachable from the m-achineifor facilie positionso: that the openings 6' register withthe 3,5 tating the" attachment and removal: of; the knife. openings 5 and then the knife must be held in Other objects; and;aims of the invention-,;more this position. while the bclts are being placed. or; lessspecific. than those referred toabova will Also, in removing a knife from connection with be. inpart Qbviousandin: part'pointedroutg in:v the the har A-it is-necessary to hold; the knife. against co.-"urs' e of -the following description of: the ele: i il ing heavily when the last bolt has been re- 40, mer ts; combinations, arrangements of pairtsqan'd moved, or from straining; upon the last two or 40 applications of principles constituting i thei in- .threebolts being removed. In View of the keen-' ,ventiom and the-scopeofprotection.contemplatness pi the cutting edge of the knife and the edwillbe indicated in the appendedclaims I weight of the kniie, both of these tasks are I he accompanying drawing which. iswto be ordinarily considered-very difficult and dangerous g5, takernas-apart of this-specification, which and must usually be. periorrned with extreme care Lhaveshownmerely apreferred iorm ef.-embodito preventboth injury totheworkman and inmentof-the invention:- 7 p I U jury torthe' knife M I r r Fig. l is a front elevatiOnaljVieW otaportion According to the present invention however, of; a papencutting machine and illustrating; the it is proposed thatan attachment-be provided in 1 TED ST TES PATENT OFFICE same; ascbeingsupp'lied withparts. proposedby the-formof arest tosuppor t the Weight of the 50 I the present invention, preparatory toremoval oi k nife, and to -so arrange this rest that the knife, theknife. w I while supported thereon, may be moved'easily 'j'E-igZZisfa' viewsimilarto Fig. l wbuflshowing 'int'o lor out-of itsproper co-operative relation the e as it appears when. disconnected...and with-theknife carryingbar. 1 H

; ieadifbrlbeihgl liftedfoutroithemachine, if; ln't he instanceillustratedthisrest is provided 55 in the form of a pair of discs as l and 8 made up separate from the machine but adapted to be easily attached thereto, there being bolts as 9 extending through the discs and having threaded rear ends adapted for engagement within threaded apertures iil provided to receive them in a por-- tion of the clamp bar H which extends below the lower edge of the knife 3. The discs 1 and 8 each have beveled peripheral surfaces as I I shaped and disposed so as to mate with and receive the beveled lower edge of the knife 3, the discs being preferably cut away slightly at their rear surfaces as at 13 so as to stand free of the keen cutting edge of the knife at all times; V

The apertures of the discs through which the bolts 9 extend are preferably placed; so as. to be slightly eccentric with respect to the discs, and

the discs are intended to be rotatable upon saidbolts when manual force is applied as through the medium of the thumb wings l3 illustrated.

The purpose of making the discs eccentric upon their supporting bolts is to provide means whereby-the operator. may conveniently elevate or depress, to a sufiiciently slight and accuratedegree, one or the other of the ends of the knife particularly during the operation of returning the knife into position accurately mating the apertures 5 of the bar A, it being noted in this connection that the two discs are spaced apart along the length of the clamp bar and of the'knife carrying bar so that they stand adjacent to op posite ends of the knife.

The purpose of making the discs rotatable upon their supporting bolts is two-fold, first, to facilitate the adjustment just referred to,and, secnd, to enable the operator, by manual rotation of the two discs simultaneously in the same direction, to adjustably move the knife longitudinally in either direction accordingto the direction of rotation of the discs. c

Assuming it is desired to remove the knife- 3; the workman proceeds by first attaching the present attachment, that is the two supporting discs, by means of their bolts 9, onto the clamping bar H. If the discs are not already in close engagement with the beveled edge ofthe knife he then rotates one or both" thereof so as ,-by reason of the eccentric mounting of said discs, to bring them into firm supporting engagement with the knife. This done the knife retaining bolts 4 are unscrewed and removed. These bolts may be all removed since the weight of the knife is no longer supported by them but is now carried upon the two discs constituting the" present attachment.

After the bolts 4 have all been removed then the workman performs the necessaryopera'tion to effect a lowering of the clamp bar, and hence of the knife, from the position shown in Figs} 1 and 3 to the position shown in Figs, 2-and 4, the knife being now entirely freeof its-engage ment with the knife carrying her A. In this position the knife may be readily liftedaway or the making of repairs, for sharpeningetci When it is desired to return the knife into operative connection with its carrying bar A the knife is first placed upon the two supporting discs, the parts being as in Figs. 2*an d 4. Thereupon the workman performs the necessary op eration to cause the clamping bar and with it the two discs and the knife to be liftedyinto approximately the positionwherein the threaded openings 6 of the knife will matetheapertures of the knife carrying barA If by this'operation these apertures are brought, without further adjustment, into proper register then the bolts 4 are inserted and screwed tight home.

If the knife requires a longitudinal adjustment this may be accomplished by simple manual rotation of the two discs simultaneously in the required direction.

If one end or the other of the knife requires relative raising or depressing in order to bring about a correct register of the bolt receiving openings, this may be quickly accomplished by rotating one or the other of thediscsas may be-necessary to produce the proper vertical movement of that end of the knife.-

, i It maybe here noted to advantage that during all adjustments of the knife by rotary movement of oneor both of the discs the knife is resting frictionally not only against the upper surfaces of-the discs but also against the fiat surface of the clamping bar. When both of the discs are simultaneously rotated in one direction the combined' frictional grip of the two discs upon the knife is sufficient to .overcome the frictional resistance betweenthe knife. and the surface of the clamping bar so that. the knife will move endwise or horizontally. 1

If however only one of the discs is rotated, while the other remains motionless, the frictional grip of the single moving disc is not sufiicient tov overcome the combined frictional grip between the knife and the stationary disc, and betweenv the knife andthe clamping bar. Thus a rotating movement of only one disc will not produce endwise movement of the knife but it will produce a vertical movementof the adjacent end portion of the knife due to the eccentric mounting of the disc. r I 1 A Workman, gripping the two discs, one by one hand and the other by the other hand, may thus quickly, easily, accurately and safely perform the required fine adjustment of the knife, both horizontally and vertically, to bring it into register with the bolt holes of the bar A.

After the knife has been relatively roughly adjusted, by reason of the upward movement of the clamping bar; and after it has been relatively finelyadjusted, if required, as by manual operation of one or both of the discs, then the bolts tare inserted and tightened. After the knife has been properly clamped by the bolts 4*then the present attachment is re moved from the clamping-bar H-s'o as to leave the face of said bar unobstructed for the'free movement of the knife in the performance of its normal functions. a .7 The-attachment contemplated by the present invention, that is the discs 1 and 8 and their retaining boltsS, is of simple and inexpensive construction, and its manner of use is of a simple and practical character requiring not greater than the ordinary intelligence of the average workman. v

"As many changes could be-made in this con struction without departing from the scope of the invention as defined in the following claims, itis'intended that all matter contained in the above description, or shown in the accompanying drawing, shall be interpreted as illustrative only and not ma. limitingsense.

l Having thus described my invention, what I claim as new and desire to secure'by Letters Patent isil V I An attachment for a paper cutting machine, said attachment being adapted to constitute a tempOrary'suppOrt for the, detachable knife of such machine, said attachment consisting of a pair of separately formed discs having pivot openings therethrough, a pair of bolts extending through said pivot openings adapted to pivotally connect said discs in position upon the machine, said pivot openings being eccentric with respect to the periphery of said discs, said discs being rotatable about said bolts to lift said knife to different elevations and said discs having means to facilitate their manual rotation independently of each other upon their respective supporting bolts.

2. An attachment for a paper cutting machine, said attachment being adapted to constitute a temporary support for the detachable knife of such machine, said attachment consisting of a plurality of separately formed discs having pivot openings therethrough, bolts extending through said pivot openings adapted to pivotally connect said discs in position upon the machine, said pivot openings being eccentric with respect to the'periphery of said discs and said discs being rotatable about said bolts to lift said knife to different elevations. I

3. A paper cutting machine including in combination a knife carrier, a knife, means for detachably securing said knife to said carrier, a clamping bar adjacent said knife, said knife carrier and clamping bar being relatively movable, means for independently moving said knife carrier and clamping bar respectively and means tachably securing said knife to said carrier, a

clamping bar adjacent said knife, said knife carrier and clamping bar being relatively movable, means for independently moving said knife carrier and clamping bar respectively, a plurality of separately formed discs having pivot openings therethrough, bolts extending through said pivot openings and pivotally'connecting said discs to said clamping bar, said pivot openings being eccentric with respect to the peripheries of said discs, said discs being adapted tosupport said knife when it is detached from said carrier and said discs being rotatable about said bolts to lift said, knife to different elevations.

EMIL L. MUELLER.

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