US2359893A

US2359893A - Trimming machine

Info

Publication number: US2359893A
Application number: US509662A
Authority: US
Inventors: Charles G Brostrom
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1943-11-10
Filing date: 1943-11-10
Publication date: 1944-10-10
Anticipated expiration: 1961-10-10

Description

Otmy 1944- c. G. BRosTRoM TRIMMING MACHINE Filed Nov. 10, "1945 2 sheets-shet 1 184 120 13,2

fn ven for Charles G Brostrom l i BS' his Attorney Oct. 10, 1944. c. G. BRosTRoM TRIMMING MACHINE 2 Sheets-Sheet 2 Filed Nov. 1o,` 194s Inventor Charles G Broszr-om Patented Oct. 10, 1944 TRIMMING MACHINE Charles G. Brostrom, Lynn,

Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application November 1'0, 1943, Serial No. 509,662

25 Claims.

This invention relates to trimming machines and is illustrated as embodied in a machine for trimming covers which have been; applied to heels to prepare said heels for attachment to shoes.

There is disclosed in United States Letters Patent No. 2,236,552, granted April 1, 1941, on an application iiled in the name of Alexis E. Ushakoli, a heel covering method which comprises placing over a wood heel block, for example, a bag-shaped cover blank consisting essentially of a swollen gel, the block hiav'ing been previously coated with cement capable of being activated by the gel, and creating a partial vacuum in the blank while allowing said blank to shrink upon the wood heel block and harden, thus providing a heel having a hard, rm cover. When the wood heel block has been covered in accordance with the method disclosed in said Letters Patent, it is desirable to remove a bulge of surplus cover material from the central part of the top-lift receiving face of the heel preparatory to nailing a top-lift to the heel, and it is also desirable to trim cover material from the attaching face of the heel to prepare the heel for attachment to the tted heel seat of a shoe. In carrying out the latter trimming operation, it is common practice to remove, by the use of a hand knife, all the cover material upon the attaching face of the heel except a marginal inturned portion thereof which overlies the rim of the heel and is inturned approximately one-eighth of an inch upon said face, thus exposing a major portion of the attaching face of the wood heel block and insuring that the covered heel may adhere securely to the heel seat of the shoe by glue during its subsequent attachment by nails and/or a screw to the shoe.

The above-mentioned bulge of surplus cover material which projects from the top-lift receiving face of the heel may be quickly and effectively trimmed from the inturned cover upon said face by the use of a hand knife. It will, however, be appreciated that to trim surplus cover material from the attaching face of the heel so as to leave a narrow inturned cover margin upon such face, as above described, is a slow and laborious operation, adding materially to the cost of the heel.

It is an object of the present invention to provide a machine by the use of which surplus cover material may be quickly and eectively trimmed from the attaching faces of heels to which shrunk-on covers such as above described have been applied so as to prepare said heels for attachment to shoes.

With the above object in view and in accordance with a feature of the present invention, the illustrative trimming machine comprises a support for a work piece, such, for example, as a wood heel to which a shrunk-on cover has been applied, a cutter having a cutting edge, means for relatively moving the support and the cutter to bring the covered heel and the cutting edge of the cutter into forced engagement with each other, and means for effecting relative bodily movement between the support and the cutter in a curved path while the heel and the cutting edge of the cutter are in forced engagement with each other to cause cover material to be trimmed from the heel by the cutter, the cutter being mounted to enable its cutting edge to swing transversely of said path in response to the drag of the work piece on the cutter so that said cutting edge will follow the curve of said path.

In the illustrative machine the support is mounted upon a platform which is swung about a horizontal axis to cause the attaching face of the covered heel positioned upon the support to be forced downwardly against the upstarrding cutting edge of the cutter, the cutter, together with a holder therefor, moving continuously in a closed horizontal path to remove portions of the heel cover which have been inturned upon the attaching face of the heel, to within approximately one-eighth of an inch of the rim of said face. The cutter may be described as a swinging vane cutter, since it is swiveled for free rotation in its holder about a vertical axis Whichis disposed at right angles to its path of horizontal bodily movement along said path from a high trailing work engaging portion of the cutting edge of the cutter. In order that the attaching face of the heel shall not be forced downwardly against the cutter with excessive pressure, the cutter holder is yieldingly movable downwardly lengthwise of said axis against spring pressure, a stop being provided to limit downward movement;y of the heel support.

In order that the cover inturned upon the attaching face of the heel may be trimmed to within one-eighth of an inch of the rim of said face, the path of bodily movement of the cutter is approximately similar to but Slightly smaller than the outline of the attaching face of the heel to be trimmed. Since there is considerable variation in the size of the rims of the attaching and is offset forwardly posts is an angular block faces of heels of different sizes, it is desirable to vary the paths of bodily movement of the cutter in order to accommodate a complete run of heels and, accordingly, the path of movement of the cutter may be varied during its operation by moving a cam into different operative positions so as to bring different portions of its outside operating face into a'position to be engaged by a spring-pressed roller mounted upon a slide which is reciprocatingly movable upon a rotatable carrier and carries the cutter holder.

The heel support is mounted for initial pivotal adjustment upon the platform so that, irrespective of the breast angle of the heel, the plane of the rim of the attaching face shall be substantially horizontal as the heel is forced vertically downward against the cutting edge of the cutter.

The various features of the inventionwill be understood and appreciated from the following detailed description read'in connection with the accompanying drawings, in which Fig. 1 is a perspective view of the illustrative machine, portions of which have been broken away;

Fig. 2 is an enlarged perspective view showing portions of the machine in .the process of trimming a heel cover;

Fig. 3 is a section on line III- III of Fig. 1;

A Fig. 4 is an enlarged sectional view of the cutter and its holder; and

Figs. 5 and 6 are perspective views showing respectively the covered heel before and after being operated upon by the illustrative machine. Y

The illustrative machine is described with reference to trimming surplus material 28 (Fig. 5) from covers 22v which have beenrshru'nk onto heels 24 in accordance with the general method disclosed in the above-mentioned LettersY Patent No. 2,236,552 to prepare such heels for attachment to the tted heel seats of shoes..

As above stated, in order that heels which have been covered with cellulosic material such as described in said Letters Patent shall adhere securely by glue to the fitted heel vseats of shoes, it is desirable that the cover shall not extend more than one-eighth of an inch, for example, over the attaching face 26 of theA heel. Itis therefore desirable to trim not only the upstanding surplus material 20- of the cover as it comes from a machine (not shown) adapted to apply shrunk-on covers to heels but also to trim the portion of the inturned cover included in dash line 28 (Fig. 5), thus providing a trimmed heel such as is shown in Fig.V 6.

In order t0 trim the above-mentioned surplus material 20 from the cover 22. of the heel 24, the heel is clamped to a work support or table 30 (Figs. 1 and 2) which is moved downwardly, through the provision of mechanism hereinafter described, to cause the attachingI face of the untrimmed covered heel to be forced against an upstanding cutter 32 swiveled for free rotation in a holder 34 which is yieldable downwardly and is movable bodily in a closed lpath similar to the dash line 28 (Fig. 5). The illustrative machine. is of the bench type and comprises a bed plate 36 (Figs. 1 and 3) to which two upright posts 38 Fig. 1) are secured by screws 4B. Mounted upon each of the 42 having an Velongated slot` 44 through which passes a screw 46 threaded into the associated post 3 8, the `arrangement being such that thezblo-cks canmbe initially secured in the desired heightwise position upon their respective posts. To insure against downward movement of the blocks l42 from their adjusted positions, there are provided setscrews 48 each of which is threaded into a stud 50 of the associated post 33 and has its upper end in engagement with the bottom of an associated block 42, the setscrew being locked to the stud by a nut 52.

Mounted in a horizontalv channel 54 in the upper portion of each of the blocks 42 is a bar 56 which may be initially secured to different forward and rearward positions to the associated block by a setscrew 58 which passes through an elongated slot |50v of the bar and is threaded into the block. To maintain the bars 56 against forward movement from their adjusted positions in the channels 54, there are provided setscrews 62 which are threaded into associated blocks 42 and which engage the forward ends of associated bars 56 and are secured to the blocks by lock nuts 64. Y

Threaded into the rear end of the right bar front of the machine is a headed sleeve 66 (Fig. l) having a bore 68 arranged in alinement with a bore 10 in the rear end of the left bar 56.. Fitting in the bores 68, 1!! in the sleeve 66 and the bar 56, respectively, are trunnion pins 12, 14 threaded into depending lugs 16 of av platform 18 (Figs. 1 and 2.). In order to assist in initially centrallizing the platform 18 and in maintaining such. adjustment, the trunnion pin 12 is provided with collars which engage opposite ends of the sleeve 66. The platform 18 may be initially adjusted lengthwise of the common axis 82 of the trunion pins 12, 14 by rotating the headed sleeve 86, which may thenl be secured against movement in its adjusted position by a lock nut 84.

The platform 18 is held in its raised idle position, shown in Figs. 1 and 2, by a spring 86 opposite ends of which are connected to lugs 88, secured respectively to the bed plate 36 and to the rear end of an arm 92 secured to the platform. Upward movement of the platform 18 under the action of the spring 86 is limited by a stop 94 welded to the right-hand block 42.

Secured to the platform 18 by rivets 96 (Fig. 2) are a pair of mounts 98 having alined bores |80 for receiving trunnions |02 of the Work support 30. The work support 36 comprises a pair of angularly disposed surfaces |04', |86 (Fig. 2) constructed and arranged to be engaged by the breast andV attaching faces, respectively, of the heel and has a rearwardly extending rib |08 provided with a bore ||U through which passes an upwardly extending screw |f|2 secured t0 the platform. The rib |208 is held in an adjusted position against a nut ||4, which is threaded onto the screw ||.2, by a strong spring ||6 mounted upon the screw andi interposed between the platform 18 and the rib. The support 30 may be quickly and effectively adjusted with relation to the platform 18l about the axis ||`8 (Fig. 2) of the trunnions |02 by rotating the nut |l4.

In order to centralize the` heel 24upon the support 3D and to swing the` support together with the platform 18 about` the axis 821 (Fig. 1)- to force the heel against the cutter 32, therev is provided a lever |28 which is mounted upon a fulcrum pin |22v carried by upstanding flanges |24 of the support. Mounted for sliding. adjustment on the lever |20 isa forked clamp |26 which may be initially secured-.indifferent adjusted. positions upon the lever by the provision of a clamping screw |28. When the machine is idle the lever |20 is held in a raised or open position (not shown) upon the support 30 by a spring |30 interposed between the support and the lever. The lever |20 has a handle |32 by which the operator, after placing the heel 24 upon the support 30, moves the forked clamp |26 about the fulcrum pin |22, to centralize the heel and to clamp it upon the support, and then moves the support downwardly in a predetermined path about the axis 82 of the trunnion pins 12, 14, to force the attaching face of the covered heel against the cutter 32.

As will appear later, the cutter 32 moves in a closed horizontal path and it is desirable that the plane of the rim |34 of the attachin-g face 26 of the heel shall be horizontal as the heel is moved approximately vertically downward against the cutter 32. It will be understood that the angle between the plane of the rim |34 of the attaching face 26 of the heel 24 and the general plane of the breast of the heel varies to a considerable extent in accordance with the size and/or style of the shoe. In order, therefore, that the attaching faces of the heels of various sizes and/or styles shall be properly presented to the cutter, the work support 30 is initially adjustable, through the mechanism above described, about the axis H8 (Fig. 2) of the trunnions |02, said axis being approximately in alinement with the vertex of a dihedral angle formed between the surfaces |04, |06 of the support. Such adjustment may be readily effected by rotating the nut 4 to move the support 30 about the axis H8, the strong spring H6 serving to hold the rib |08 of the support in adjusted position against the nut and thus maintaining the proper adjustment between the support and the platform 18. With the above construction it will be clear that by adjusting the work support 30 with reference to the platform 18 the rim |34 of the attaching face 26 of the heel may be initially set in the same plane irrespective of the breast angle of the heel.

In order to insure against the cutter 32 being forced a substantial distance into the attaching face of the heel, the platform 18 carries a stop pin |36 which is constructed and arranged to engage the top of the left block 42.

During the operation of the machine, the cutter 32 moves bodily continuously in a closed horizontal path, the size of said path, as will appear later, being varied in accordance with the size of the attaching face of the heel being operated upon. The cutter 32, which may be described as resembling a trailing vane, has a cylindrical shank |38 (Fig. 4) which fits in a correspondingly shaped recess |40 of the holder 34, the lower end of said shank engaging the bottom of the recess. The holder 34 is mounted for vertical sliding movement in a cylindrical recess |42 (Fig. 3) of a housing |44 of a slide |45, the holder being constantly urged upwardly against a cap nut |48 which is threaded onto the housing, by a spring |50 interposed between the holder and the bottom of the recess |42.

The cutter 32 has a chisel-shaped cutting edge |52 which is inclined to the path of bodily travel of the cutter, the upper half of said cutting edge being dentated to form an interrupted cutting edge. The upper or work engaging portion of the cutting edge |52 of the cutter 32 is offset rearwardly along the path of ybodily movement of the cutter from an axis |54 about which the cutter is swiveled. Since the cutter 32 is swiveled for free rotation in its holder 34, it will be apparent that during bodily movement of the cutter in its closed path the cutting edge |52 of the cutter will be swung laterally of said path by reason of the drag of the cutter in the work so that the cutting edge will follow said path. The cutter 32 may be said to be freely rotatable about an axis which is disposed at approximately right angles to the path of bodily movement of the heel past the cutter and which is disposed at approximately right angles to the attaching face of the heel and is offset forwardly from the cutting portion of the cutter engaged by said attaching face.

Rotatably mounted upon a pin |88 (Figs, 2 and 3) threaded into the lower portion |46a of the slide |46 is a roller |90 which is held constantly in engagement with a surface |92 of a cam |94 by a spring |96 (Fig. 3), one end oi which engages a depending lip |98 of said portion |45a and the other end of which engages an upstanding abutment 200 secured by a screw 202 to the carrier |62. The cam |94 is keyed to an upper reduced portion of a fixed cylindrical post 204 which is vertically movable into different adjusted positions in a bore 206 of the bearing |10, the cam being locked against a shoulder of the shaft by a nut 208. As the slide |46 is bodily rotated about the cam |94 together with the carrier |62 it is moved along the guideway |60 (Fig. 2) in the carrier by reason of the action of the roller |90 against the surface |92 of the cam, thereby imparting to the cutter bodily movement in a path approximately similar in shape to but larger than the portion of the cam engaged by the roll.

In trimming the covers of a full run of sizes of heels the size of the closed path of bodily movement of the cutter may be advantageously varied and accordingly the elevation of the cam |94 is varied, lusually without stopping the cutter 32, so as to bring different heightwise portions of the surface I 92 of the cam into positions to be engaged by the roller |98. It has been found that three different heightwise settings of the cam |94 are sufficient to accommodate a full run of sizes of heels and accordingly there is provided a shaft 2|0 supported for rotation in bearings 2 2 of the bed plate 36 and having at its rear end circumferentially arranged teeth 2l4 meshing with teeth of a rack 2|6 formed on the lower portion of the post 204, the shaft having secured to its forward end a lever 2|8 carrying a springpressed detent 220 which may be selectively moved into registration with any lone of three holes 222.

In order to insure against the operator accidentally engaging the moving cutter 32, there is provided a metal disc or safety plate 224 which overlies the cutter except when a heel is being presented to the cutter. The disc 224 is considerably larger than the path of bodily movement f the cutter and is secured by rivets 2-26 to an arm 228 pinned to a block 230 which is slidingly supported upon a bearing plate 232 by the provision of a fulcrum pin 234 secured to the block. The bearing plate 232 has a depending ange 236 which is adjustably secured to the left block 42 by screw-and-slot connections 238. The disc 224 i is swung in timed relation with the platform 18 through a link 240 forward and rear ends of which are pivoted to bifurcated

studs

242, 244 secured to the arm 228 and the platform 18, respectively, the arrangement being such that as the heel is swung downwardly against the cutter 32 the disc 224 swings forwardly to .enable the heel to engage the cutter and as the heel is moved to its raised starting position the disc moves back to its starting position, shown in Fig. 1.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a trimming machine, a support `for a work piece, a cutter having a cutting edge, means for relatively moving the support and the cutter to bring the work piece and the cutting edge of the cutter into forced engagement with each other, and means for effecting relative bodily movement between the support and the cutter in a curved path while the work piece and the cutting edge of the cutter are in forced engagement with each other to cause material to be trimmed from the work piece by the cutter, the cutter being mounted to enable its cutting edge to swing transversely of said path in response to the drag of the work piece on the cutter so that said cut ting edge will follow the curve of said path.

2. In a trimming machine, a support for a work piece, a cutter having a cutting edge, means for moving the support to bring the work piece into forced engagement with the cutter, and means for moving the cutter bodily in a closed path relatively to the work piece to trim material from said Work piece, the cutter being mounted to enable its cutting edge to swing transversely of said path in response to the drag of the work piece on the cutter so that said cutting edge will follow said closed path.

3. In a trimming machine, a support for a heel to which a cover has been applied, a trailing vane cutter which is bodily Vmovable in a closed path, and means for moving the .support to force said heel against the cutting edge of the cutter, whereby to cause a portion .of Athe cover to be removed from the heel, said cutter being swiveled about an axis which is disposed at approximately right angles to said .path of.

bodily movement of the cutter and which is offset lengthwise of said path from a work engaging portion of the cutting edge of the cutter.

4. In a trimmingv machine, a support for a work piece, .a trailing vane cutter having an interrupted cutting edge, .means for `moving the support to cause the work piece to be forced against the cutting edge ofthe cutter, and `means for moving the cutter bodily in a curved path to cause material to be 4removed from the work piece, said cutter being so constructed and arranged that during its movement in said path its cutting edge may swing freely to enable the cutter to follow the curve of the path.

5. In a trimming machine, a support for a Work piece, a cutter having an interrupted cutting edge, means for causing the work piece and the cutting edge of the cutter to be forced yieldingly against each other, and means for effecting relative translatory movement between the cutter and the work piece in a curved path to cause material to be trimmed from the work piece, said cutter being swiveled for rotation transversely of said path to Venable the cutting edge of the cutter to follow said path.

6. In a trimming machine, a support for a work piece, a cutter, means for forcing the work piece against the cutting edge of the cutter, said cutter being supported yieldingly against pressure of the work piece, and means for moving the cutter bodily in a closed path to remove material from the work piece, said cutter being swiveled for free rotation about an axis which is angul-arly related to said path and is offset from a high cuttingportion of the cutting edge to cause the cutting edge of the cutter to follow said path.

7. In a trimming machine, a support for a work piece, a cutter, means for moving the support to force the workpiece against the cutter, and means for moving the cutter in a closed path past the work piece to remove material from a face of said work piece, said cutter being freely rotatable under the drag of the work piece about an axis which is disposed at approximately right angles to said face of the work piece and is offset forwardly of the cutting portion of the cutting edge of the cutter thereby enabling said cutting portion to follow said closed path.

8. In a trimming machine, a support for a work piece, a cutter having an interrupted cutting edge, and means for moving the cutter bodily in a path which is angularly related to said cutting edge, said cutter being freely rotatable about an axis which is disposed at approximately right angles to said path and which passes approximately through said cutting edge at a point located somewhat forwardly of a portion of the cutting edge engaged by the work piece.

9. In a trimming machine, a support for a work piece, a swiveled cutter mounted for bodily movement ina closed path and having a dentate cutting edge, and `means for moving the support to force the work piece against said edge thereby causing material to be removed from the work piece.

10. In a trimming machine, a support for a work piece, a cutter mounted for translatory movement in a 4closed path and having an interrupted cutting edge angularly disposed to said path, said cutter being swiveled for movement about an axis which is disposed at approximately right vangles to said path and is located somewhat forwardly of the portion of 'the cutting edge Vengaged bythe -work piece, said cutter also being yieldable lengthwise of said axis under pressure of the work piece, and means for moving the support to force the work piece against said portion of the cutting edge of the cutter, thereby causing material to Vbe removed from the work piece.

1l. In a trimming machine, a support comprising angularly disposed surfaces which are constructed and arranged to be engaged by the attaching and breast faces respectively of a covered heel, a trailing vane cutter movable in a closed path, and means for moving the support to force the attaching face of the heel against the cutter, thereby causing portions of the cover to be trimmed from said attaching face.

12. In a trimming machine, a support comprising angularly disposed faces constructed and arranged to be engaged by the attaching and breast faces respectively of a heel to which covering material has been applied, said faces of the support forming between them a dihedral angle the vertex of which is approximately engaged by the upper breast corners of the heel, a trailing vane cutter movable in a predetermined path, and means for moving the support to force the attaching face of the heel against the cutter, thereby causing surplus covering material to be trimmed from said attaching face, said support being initially adjustable about an axis extending along the vertex of said dihedral angle in order to insure that the rims of the attaching faces of heels having different breast angles shall be initially arranged upon the support in the same plane.

13. In a trimming machine, a support for a heel to which a cover has been applied, a trailing vane cutter movable bodily in a closed path, means for moving the support toward the cutter to cause portions of the cover to be removed from the heel, said cutter being swiveled for free rotation as it is moved bodily in said closed path to enable a cutting edge of the cutter to follow said path, and means for varying the path of bodily movement of the cutter.

14. In a trimming machine, a support for a work piece, a cutter movable bodily in a closed path, means for moving the support to cause material to be removed from the work piece, said cutter being swiveled for rotation to enable a work engaging portion of the cutting edge of the cutter to follow said path, and means for varying the path of movement of the cutter during its operation.

15, In a trimming machine, a support for a heel to which a cover has been applied, a trailing vane cutter movable bodily in a closed path, means for moving the support to cause portions of the cover to be removed from the heel, said cutter being swiveled for rotation to enable a cutting edge of the cutter to follow said path,

and means for varying the path of movement of the cutter during its operation.

16. In a trimming machine, a chisel-shaped cutter movable bodily in a closed horizontal path, and means for forcing a work piece against the cutter to remove material from the work piece,

said cutter being swiveled for rotation about a vertical axis and having a cutting edge which is disposed at an angle to said axis and has its work engaging portion offset rearwardly along said path from said axis so that pressure of the work piece against said work engaging portion causes the cutting edge to follow along the path of movement of the cutter.

17. In a trimming machine, a cutter having an interrupted cutting edge, said cutter being movable bodily about an axis which is spaced a considerable distance from the cutter, and means for forcing a work piece to which a cover has been applied against said cutting edge of the cutter to trim a portion of the cover from the work piece, said cutter being swiveled for free rotation about an axis which is approximately parallel to said iirst-named axis and passes approximately through and is inclined to said cutting edge.

18. In a trimming machine, a support having angularly related surfaces constructed and arranged to be engaged by the attaching and breast faces respectively of a heel to which a cover has been applied, a cutter having a cutting edge, said cutter being bodily movable in a closed path, and means for moving the support to force the attaching face of the heel against the cutter, thereby removing from the heel a portion of the cover overlying the central part of said attaching face but leaving the cover overlying the margin of such face, said cutter being swiveled for free rotation about an axis which extends generally heightwise of the heel being forced against the cutter and which is offset forwardly from the portion of the heel in engagement with the cutter.

19. In a trimming machine, a support having angularly relatedv surfaces constructed and arranged to be engaged by the attaching and breast faces respectively of a heel to which a cover has been applied, a cutter movable bodily in a closed path, and means for moving the support to force the attaching face of the heel against the cutter, thereby removing from the heel a portion of the cover overlying the central part of said attaching face but leaving the cover overlying the margin of said face, said cutter being swiveled for free rotation about an axis which extends generally heightwise of the heel being forced against the cutter and which is offset forwardly from the portion of the heel in engagement with the cutter, said cutteralso being yieldable lengthwise of said axis to enable the cutter to be moved under pressure of the heel as it travels in said path.

20. In a trimming machine, a cam, means comprising a rotatable member and a slide which is movable with and relatively to said member, a roller carried by said slide, a spring for constantly urging the roller against the cam, a cutter swiveled upon said slide, and means for varying the position of the cam to cause different portions thereof to be engaged by the roller, whereby to vary the path of movement of the cutter.

21. In a trimming machine, a carrier rotatable about an axis, a cutter, a holder for the cutter, said holder being movable together with the carrier and also being movable toward and away from said axis as it is moved with the carrier, said cutter being swiveled in its holder for movement about an axis which is approximately parallel to the axis of rotation of the carrier, said cutter also being yieldable lengthwise of the axis about which it isswiveled, and means for forcing a work piece against the cutter to cause portions of a cover applied thereto to be removed from the work piece.

22. In a trimming machine, a carrier rotatable about an axis, a cam, a cutter, a cutter holder, said holder being movable together with the carrier and also being movable a predetermined amount toward and away from said axis under control of said cam as the holder moves with the carrier, said cutter being swiveled in its holder for movement about an axis which is approximately parallel to the axis of rotation of the carrier, means for forcing a work piece against the cutter to cause portions of a cover applied to the work piece to be removed from said work piece, and mechanism for moving the cam into different adjusted positions to vary the amount of movement of the holder upon the carrier.

23. In a trimming machine, a cam, a carrier .IIlOVable about said cam, a cutter, a cutter holder,

said holder being bodily movable in a closed path together with thev carrier and also being mounted for translatory movement rela-tively to the carrier, means comprising a roller operatively connecting the holder. to the cam, resilient means for causing the roller constantly to engage the cam, means for moving the cam into different adjusted positions to bring different portions of the cam into a position to be engaged by the roller inorder to vary the path of movement of the cutter, and means for forcing a Work piece against the cutter to cause material to be trimmed from the Work piece.

24. In a trimming machine, a cutter movable bodily ina closed path, a support for a heel to which a cover has been applied, a clamp, and a common operating member for forcing the heel against the support and for then moving the support together with the heel ina predetermined path to force the heel against the cutter thereby causing portions of the cover to be removed from the heel.

25. In a trimming machine, a cutter, said cutter being movable bodily in a closed. path, a support for a heel to which a cover has been applied, a clamp, and a common operating member for forcing the heel against the support and for then forcing the heel secured to the support against the cutter to cause portions of the cover to be removed from the heel, said cutter being swiveled for rotation about an axis which is disposed at approximately right angles to the path of bodily movement of the cutter and is located ahead of the portion of the `cutting edge of the cutter in contact with theheel.

CHARLES G. BROS'IROM.