US1051686A - Cloth-cutting machine. - Google Patents

Description

P. J. CLARK. CLOTH CUTTING MACHINE.

APPLICATION FILED DEC. 19, 1911.

1,051,686, Patented Jan. 28, 1913.

2 SHEETS-SHEET 1.

F. J. CLARK.

CLOTH CUTTING MACHINE.

APPLICATION FILED DEC.19,1911. 1 ,051,686. Patented Jan. 28, 1913.

2 SHEETS-SHEET 2 21 z ariz 65/0.

UNITED STATES PATENT OFFICE.

FREDERICK J. CLARK, 0E BUFFALO, NEW YORK, ASSIGNOR 'ro EASTMAN MACHINE CQIIIPANY. OF BUFFALO, NEW YORK.

cno'rn-cu'r'rmc MACHINE.

Specification of Letters Patent.

Patented Jam 28,1913.

Application filed December-19, 1911. Serial No. 666,681.

To all whom it may concern L' Be it known 'that'I,

New Ytork, have (if which the following is aspecification.

This invention relates more" particularly to improvements in cloth cutting machines of that type in which a driven rotary knife is employed for cutting the cloth, and has es ecialreference with which the machine is provided for sharpening the knife.

The ob'ect of this invention is to construct a cloth 0' tting machine of this type having a simple and eflicient knife sharpening device which normally stands out of e gagement with the knife in a position where it .does not interfere withthe operators View.

of the cutting edge of the knife and the.

front of the same; and which engagement with the opposite sides pattern in canbe easily'x'noved into the knife and will engage ofthefcutting edge thereof with an equal pressure and w'illsharpen the saine infan even; and uniform manner circumference of the. knife; and iustable' relative to the knife to conform to the knife. in-the accompanying drawing, consisting of two sheets: Figure 1 is-a side elevation of'a cloth cutting machine provided with a sharpening device. embodying the invention.

" Fig-Bis a fragmentary side elevation ther'eof, on an enlarged scale, showing the sharpening device in engagementwith the knife. Fig. 3 is a fragmentary front elevation thereof looking in the 3 in Fig. 2. Fig'. 4 is. a longitudinal section throughone of the grinding members. 5'is a fragmentary f ,machine' looking in the direction 0 the arrow 5 in Fig.

position. Fig. 7

ening device in its raised line '7 7, Fig. 6.

is a sectional elevation'in -Fig. 8 is a rear elevation vof the sharpening,

to the sharpening means.

throughout the which is ad-.

direction-of the arrow M Fig. ront elevation of the.

p 2: Fig. 6 i'sa -fragmentary" front elevation thereof showlngthe sharp machine having ,a

- showing the sharpening device in its raised FREDERICK J. CLARK, a'citizen' of the United States, residing at Buffalo, in the county of Erie" and Stateofinvented a new and useful Improvement, in Cloth-Cutting Machines,.

position.

Like reference characters refer to like parts in the several figures.

The cloth cutting machine shown is! a rotaryiknife machine of standard type and comprises a base plate A, a standard-B secured thereto, a frame C adjustable on the standard, a rotary knife D,=the cutting edge of which is beveled on its opposite sides in the usual manner, and a motor E which is car ried by t he frame and is connected' with the knife by. suitable driving gears. All of theseparts are common in rota knife machines. and may be of any suitable and proper construction.

The present invention'relates' to the-knife sharpening device of the machine, and this,

in general terms,'. consists .of .two rotary] grinding disks or wheels which are supported from the frame of thejm-achine in such'a manner that they-normally'stand at one side .of the knife where they do .not'interfere with the operators view of the. knife and the pattern,

unison 'into engagement with the.opposite sidesof the cutting edge .of the knife and to bear with equal pressure .-ther'eon, thus 'pro ducing-an even and uniform grinding of the knife edge on both sides thereof and prebut are adapted to be moved in serving the alinement of theedge through the circumferencqof the knife- I In the particular embodiment of the in ,vention shown, disks or wheels, which are of usual construc tion, comprising a back f to which is secured an annular grinding face or ring'- f of emery or other suitable abrasive material, and G G represent pivotal supporting arms to which the disks F F may e secured in any suitable manner. As shown, each arm is provided at its outer or free end with an offset portiong through which extends abolt 9' having screwthreaded engagement therewith. The bolt g is provided at its inner end with a shoulder g and a reduced end portion 9 upon which is screwed a bushing 9 having a reduced bearing portion andan end shoulden' The grinding disk is journaled on the bearing portion of the bushing 'q between the end shoulder thereon and a washer on the bolt g which abuts against the shoulder g3 By turning the bolt 9', the grinding disk can be adjusted axially relative to.the. offset 9 of the supporting arm F F represent the grinding and a suitable lock nut 9 may be provided for securing the boltin its adjusted position on the arm. The support-s for the grinding disks are so arranged that when the disks are-in engagement with the edge of the knife each disk will be slightly inclined to the vertical plane of the knife, and the grinding fa ceof the disk will be inclined to correspond with the beveled sides of the 'knife edge.

The knife traveling across the engaging face of the disk will produce a rotary motion of the disk but in a direction at an angle to the rotation of the-knife so that the engaging face of the disk will effectively grind the edge of the knife.

The arms 'G Gniay be pivotally secured to the frame of the machine aiid fperatively -m unison in any suitable manner.

.i'acc ofthe plate pom'iected together so that they will I bolt 7' (Figs. '8 and 9 which extends through the slot h aan d' has screwthreaded engagement with the plate I. The stationary plate II has a guide channel 71' in the outerface thereof and the adjusting plate I has a rib fected. but any other suitable means. for ad- 'a'? .(Fig. 3). which engages therein for guiding the'adjustin platein its movements on the stationary plate. For effecting this adjustment of the pl'ate I, it is provided with a lateral earor lug kin which is mountedan adjusting screw K which engages an-ear k on the bracket 12. A uniform adjustment of the disk carrying arm -can'thus be easily-efjustably connecting the disk and carrying arms to the frame may be employed if desired.

. The disk carrying arms are 'pivotally se en d to the adjusting plate I as follows:

The arm G is provided with apivot pin or bolt-L which is journaled'in an opening in the plate I and extends through the slot h in the plate H and through an opening in "the end'of the arm Glwith which ith'as screwthreaded engagement. The bolt L has a vshoulderl and is providedg between this shoulder and the inner face of the arm G. with a spacingsleeve Z. The outer end of this bolthas a nut Z [which engages the "but'er face of the arm G, andtlie. arm can :"Jthus be rigidly s ecured to 'the'bolt.

arm G'is secured to theplate I by a bolt M The which has screwthreaded engagement with the plate I at its inner end and is provided "with an annular flange or stop m between which 'and the face of the plate I there is journ'alecl a gearsleeve m to which one end of the arm is secured so that the sleeve and arm turn together. v

The disk carrying arms G and G are operatirely connected together in the construction shown in a very simple manner. The pivot L to which the arm G is secured has an enlarged toothed head N which meshes with the teeth of the gear sleeve m to which the arm G is secured. Thetwo arms will thus always move in unison inopposite directions and any force applied to either arm will beat once directly communicated to the other arm. y

The pivoted arms G G are normally held sprin O which is secured to a projecting end of the bolt M and engages the outer means may be employed for this purpose,

carrying arms are such that" in their raised position they extend at one side of the vergrinding disks carried by them d not interfere with the operators view ofthe knife and the pattern.

P represents a handle which is secured to arms into their lowered position in which their grinding disks'are in engagement with the knife, and the retaining of them in this position until the knife has been sharpened; Anyforc'e which is applied to the arm G during the sharpening operation will be grinding disks F and F will bear with equal pressure against'the opposite beveled sides of the cutting edge and grind the same uniformly on both sides. Thelgrindon their supporting arms relative to each other and to the sides of the khife which they engage, and the two disk carrying arms are adjustable together relative to thefframe and the knife. This enables the device to be readily and carefully adjusted so that both grinding wheels will be in position for proper engagement with the cutting edge of the knife and will simultaneously engage the same and bear thereon with equal force. These adjustments are ample to take care of any-change in the size or p'osit-ion'of the knife "due to wear or any adjustment-Zof'the pivoted to the same supporting plate,- their engaging gears will always remain'in mesh irrespective of' any adjustment of their support relative to the" frame of the machine.

In FigslO. 11 and 12 is shown a modified construction in which sharpening Wheels R R having peripheral sharpening surfaces 1' in a raised position above. the knife by a tical plane of the knife where they and the the arm'G to facilitate the swinging of the end of the arm G, but any other suitable The shape and arrangement of the disk communicated tothe arm G so that the ing disks or wheels are separately adj ustable knife. The disk carrying ar ms being both are employed in the place of the sharpening disks F F., These wheels are mounted upon pivoted arms S' S which are adjustably secured to the frame of the machine .and

operatively connected together to swing in l unison and normally held in. a raised 'posi-' in thesame manner as tion above the knife, the arms G G above described. The-wheels RR aresoarran'ged on the arms S Sthat wpen the wheels are in engagement with the In ife' their axes ex-tend substantially arallel'w'ith the vertical plane of the kni e at opposite sides thereof so that the periphery of tlie wheels will enga'get'he opposite .sides of'the. beveled edge of the knife. In this construction, as in the other, the grinding wheelsbear equally against :the opposite sides of thecutting edge. and grind the same evenly and uniformly throughout its length.

In both constructions the sharpening device is of simple-and compact construction,

'quickly adjusted so that they will equally bination with a rotary knife,

of the cutting. edge engage theopposite sides of the knife and can beraised'or lowered i'elative to the knifeto bring .them to. av proper position for en-- agingthe opposite beveled sides thereof.

I claim as my invention:

1. In a clot-h'cutting machine, the combination with a rotary knife, ofa sharpening device therefor comprising opposed grinding members which are movably mounted on the'frame of the machine and are 'adapted to be moved into and out of sharpening engagement with the knife, and connections between said members which operate, when either member is moved in either directiomto positively produce a simultaneous opposite movement of the other member, substantially'as set forth.

2. In a cloth cutting machine, the comof a sharpening device therefor comprising opposed grinding members which are pivotally mounted on the frame of the machine to swing thereon in opposite out of engagement with the opposite sides of the knife, and com 'nections between said members which operate, when either member is moved into or out of engagement with one side of said cutting-edge; to positively and simultaneously move the other member likewise into or out of engagement with the opposite side of said cutting edge, substantially as set,

forth;

- 3.1m a cloth cutting machine, the com- 1 opposite directions,

grinding members, supporting arms moved, and a suppo bers which are directions into and opposite posite sides ofthe sharpening ledge bination with a rotary knife-, .of asharpen- .ing device therefor comprising posed grinding members, supports for "sai member's. which are pivotally' mounted on the frame of the mach'ne-to swing uthereonin andconnect-ions between wh ch operate, 'when either.

said supports member is moved in eitherdirection, to produce a positive and simultaneous movement of, the other member in an opposite. direction, substantially as set forth.

4. In a' cloth cutting machine, the-comb'ination with :a rotary knife, of a sharpen-- in device therefor, comprising opposed grinding members. supports for said members which are'pivotally mounted on the frame of the machine to swing thereon in oppo'site directions to move said members into and out .of'engagement, with. the opposite sides of the sharpening edge of the knife, connections between said members whichop'erate, when either member is moved into or out of engagement with one side of said cutting edge, to. likewise positively move the other memb'er into or out of engagementwith the oppositev side thereof, and means connected with one of' said'me'mbers for moving said members into and out of engagement with said cutting edges substantially as set forth. I p

5. Ina cloth cutting machine, the combinationwith a rotary knife, of a sharpening device therefor comprising opposfed or said embers which are movable in opposite directions tobring: said members into and out .of sharpening engagement with the knife, connections between said arms which operate to produce a simultaneous opposite movement-ofsaid arms when. either-arm is rt, for said arms which is adjustably secured to the frame of the machine, substantially as set forth.

. 6. In'a clothcutting machine, the combin ation with a rotary knife, of a sharpening device therefor comprising opposed grinding members, supports for said memmovab v frame of the machine and are unovable thereon to a position in which. said members have sharpening engagement with said knife,

and to aposition in which said members stand above, and at one side o f said knife, and means for normally retaining said supports in said last stantially as set' forth.

7. In a cloth cutting machine, the coin-- of a sharpenv bination with a rotary knife, i'ng device therefor comprising opposed grinding members. supports forsaid memf bers which are pivotally mounted on the frame of-the machine to swing thereon in directions to move. said members out of engagement with the onof the into and mounted on thementioned position, sub;

said supports relative to each other and to the cutting edge ofthe knife, and connec-' tions between said members which 'operate when one member is moved in one direction to produce a positive and sim'ultaneous movement of the other member in an opposite direction, substantially as set forth.

8. In a cloth cutting machine,, the combination with a rotary knife,of a sharpening device therefor comprising opposed grinding members, separate arms on which said membersare journaled, a supporting plate to which said arms are pivoted, means I for adjustably securing said plate to the frame of the machine, means for normally retaining said arms in a raised position with their grinding members out of engagement with the knife and at one side of the vertical plane thereof, and connections between said arms which produce a uniform movement thereof in opposite directions to bring said grinding membersinto engagement with the opposite sides of the cutting edge of the knife, substantially as set forth.

Witness my hand, this 15th day of'December, 1911.

FREDERICK J. CLARK.

\Vitnesses.

EDW'ARD C. HARD, CYEs'm B. HORNBECK.

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