US2691417A

US2691417A - Apparatus for beveling felt protective pads

Info

Publication number: US2691417A
Application number: US126409A
Authority: US
Inventors: John F Piller
Original assignee: Scholl Manufacturing Co Inc
Current assignee: Scholl Manufacturing Co Inc
Priority date: 1949-11-09
Filing date: 1949-11-09
Publication date: 1954-10-12
Anticipated expiration: 1971-10-12

Description

Oct. 12, 1954 J. F. FILLER 2,691,417

' APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov. 9. 1949 5 Sheets-Sheet 1 I Win H h. "mm "mum. is

r -E i1 vie y/g/M FIZZ/5 Oct. 12, 1954 .1. F. FILLER 2,691,417

APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov. 9. 1949 3 5 Sheets-Sheet 2 Oct. 12, 1954 J, PlLLER 2,691,417

APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov. 9. 1949 s Sheets-Shea 4 fru efzfar v (/OiZFBlZk/ (jct. 12, 1954 J. F. PILLER 2,691,417

APPARATUS FOR BEVELING FELT PROTECTIVE PADS Filed Nov... 9, 1949 5 Sheets-Sheet 5 by 4:5 .21; w

Fig .5

Patented Oct. 12, 1954 APPARATUS FOR BEVELING FELT PROTECTIVE PADS John F. Piller, Chicago, Ill., assignor to The Scholl Mfg. 00., Inc., Chicago, 111., a. corporation of New York Application November 9, 1949, Serial No. 126,409

6 Claims. (Cl. 164-71) fortable than a pad having parallel top and bottom surfaces. While the beveled protective pad has been found to be far superior to the pads now on the market, due to the increased comfort to the wearer of the pad, beveled pads have never been supplied in commercial quantities to any great extent due to the fact that it has not heretofore been possible to bevel the soft felt of the pad by machine, such pads which have formerly been produced being beveled by hand, making them extremely costly to manufacture.

One object of the present invention is to remedy the foregoing difficulties by providing a novel and improved method and apparatus for efficiently and inexpensively beveling soft felt protective pads for corns or the like.

A further object of my invention is to provide a novel method for beveling soft felt protective pads in a more efficient and facile manner than formerly by cutting the outer and top surfaces of the pad at the desired angle of the bevel with a high speed knife like rotary cutting action movable transversely of the top surface of the pad and following the contour of the periphery of the pad.

A further and more specific object of my invention is to provide a new and improved form of apparatus for beveling the top and outer surfaces of soft felt protective pads of various desired shapes by providing a rotary knife rotatably driven at a high rate of speed with its cutting edge inclined at substantially the angle of the desired bevel of the pad and moving transversely of the top of the pad and by providing means for feeding this cutter along the pad in the path of the periphery thereof.

A further and more specific object of my invention is to provide an apparatus for beveling soft protective pads in a more efficient and facile manner than formerly having a high speed rotary knife cutter with its cutting edge positionable in the plane of the desired bevel of the pad and having cam means bodily moving the cutter in the path of the periphery of the pad to be beveled.

These and other objects of my invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawings wherein:

Figure 1 is a view in side elevation of a beveling apparatus constructed in accordance with my invention;

Figure 2 is a front end view of the apparatus shown in Figure 1;

Figure 3 is an enlarged fragmentary detail plan view of the work supporting table for the pad to be beveled;

Figure 4 is a fragmentary side view of the apparatus looking at the opposite side thereof from Figure 1;

Figure 5 is an enlarged fragmentary horizontal sectional view taken substantially along line V-V of Figure 2;

Figure 6 is a fragmentary transverse sectional View taken through the beveling apparatus and substantially along line VIVI of Figure 5;

Figure '7 is a fragmentary sectional view taken substantially along line VII-VII of Figure 6;

Figure 8 is a fragmentary bottom plan view looking toward the'cutting disk and support from the bottom thereof, substantially along line VIIIVIII of Figure 6;

Figure 9 is a fragmentary horizontal sectional view taken substantially along line IX-IX of Figure 6;

Figure 10 is a fragmentary sectional view taken through the rotary disk cutter substantially along line XX of Figure 6; and

Figure 11 is a perspective view of a corn pad, beveled in accordance with my invention.

Figures 1 and 2 of the drawings show a beveling machine I0 constructed in accordance with my invention, mounted on the top of a bench or table II. The table II may be of any desired form and is herein shown as being 'a well known form of table of the work bench type having a foot lever l2 transversely pivoted thereto and arranged to control raising and lowering of a rotary knife I4 to and away from the work, to form a beveled pad l5, as shown in Figure 11, from a felt having parallel top and bottom sides, as will hereinafter more clearly appear as this specification proceeds.

The beveling machine It includes a base it suitably mounted on the top of the table or bench H and having a column I9 mounted thereon and projecting upwardly therefrom. An

overhanging or outboard support member 29 is mounted on the column i9 adjacent its upper end, and projects outwardly therefrom and forms a support for the knife M and the mechanism for driving and feeding said knife. The outboard support 26 has an outer end portion 2%, the inside of which may be substantially cylindrical, open to the inside thereof, in which is slidably guided a post 23. The post 23 has rack teeth 2d cut on its rear face and also has a support plate 25 secured to its lower end and extending outwardly therefrom. The support plate 25 has a vertically extending motor support 26 at its outer end, to which is secured a drive motor 2'! having a vertical armature shaft 28 and forming a drive for the rotary knife is, and also forming a drive for the means for feeding said knife in a path conforming to the contour of the pad to be beveled.

The post 23 is vertically adjusted with respect to the cylindrical portion 2i of the outboard support 29 by means of a pinion 29 on a shaft 33 and meshing with the rack teeth 2%. Said pinion may be turned by a hand wheel ill on an outer end of shaft 38. Vertical movement of the post 23 and cutter M. is limited by means of two vertically spaced knurled nuts 3232. The nuts 3232 are threaded on a vertical threaded shaft 33 in spaced apart relation with respect to each other and are adapted to engage opposite sides of a lug 3d, projecting laterally from the outboard support 28 and having the threaded shaft 33 passing therethrough. The shaft 33 is mounted at its lower end on a strap 35 secured to the post 23, for vertical movement therewith.

When the cutter disk It has been set to the proper cutting angle and height, it may quickly be moved into or out of engagement with the felt by means of the foot lever E2. The foot lever l2, as herein shown, has a link 39 pivotally connected thereto intermediate its end and extending upwardly therefrom. The link 38 is herein shown as being connected to a parallel upwardly extending link 60 by means of a coupling member fil, affording a means for adjusting the length of the resultant link formed by said connected links. A tension spring 43 connected between the bottom of the top of the table H and the coupling ll is provided to urge the foot lever 12 into an upwardly extended position and raise the knife l4 above the work when foot pressure is relieved from the pedal of said lever. The upper end of the link ii] is pivotally connected to one lever arm of a bell crank iii, transversely pivoted to the outboard support it on a pivotal pin 46, projecting outwardly therefrom. The other lever arm of the bell crank 45 depends from the pivotal pin 45 and has a link 6'1 pivoted thereto, connecting said bell crank to a lever arm 59, secured to the shaft 353. Depression of the foot lever l2 will thus pivot the shaft 3!] and pinion 29 in a direction, which in Figure 1 is a clockwise direction, and move knife I l downwardly into engagement with the work.

The support plate 25 is herein shown as bein suitably secured to and projecting outwardly from the post 23, adjacent the lower end thereof. The plate 25 has three radially spaced slots 53-53 extending therethrough from the top to the bottom thereof and intermediate the ends of said plate and forming a means for adjustably mounting a support member 54 on the underside thereof, as by machine screws 5555 extending through said slots and threaded within said support member (Figures 5 and 6). The support Lil member 54 forms a support for a spindle 55 mounted therein and depending therefrom. The spindle 56 has a reduced upper end portion 5'! extending through said support member and partially through the support plate 25, and detachably secured thereto as by a set screw 5E. The spindle 55 has a sleeve 8!! mounted thereon having a rectangularly flanged lower portion 61. The sleeve fill is free to rotate about the spindle 56 and is held in engagement therewith by means of a disk 53 mounted on a reduced lower end portion of said spindle and abutting the bottom of the flange 6!. The disk 83 is herein shown as being held to the reduced lower end portion of said shaft by means of a cam 66 having a hollow central portion encircling said shaft, and secured thereto as by a machine screw 66 threaded in the bottom of said shaft. The bottom of the rectangular flange 6! has two parallel gibs fil-fil depending therefrom and extending along opposite sides thereof and forming a slidable guide for a tool support 69. Two parallel spaced retaining strips ill-l0 are suitably secured to the bottoms of said gibs and extend therealong and inwardly therefrom along the underside of the tool support 69 to slidably support said tool support on the bottom of said flange.

The tool support 69 as shown in Figures 6, 7, 8 and 9 comprises a flat plate '13 engaged by the retaining strips 'H!l0 and having an inner cut-away portion M within which the cam 6-: extends. The plate (3 is herein shown as having a depending block 15 secured to the underside thereof as by machine screws lt-'i6. The block it has an inner upper shouldered portion 'i'l having a cam follower I9 rotatably mounted thereon for engagement with the outer face of the cam 66.

The follower 19 is held in engagement with the cam G l by two tension springs 8l-3l (Figures 8 and 9). Said springs are secured at one of their ends to the outer end portions of a yoke-like portion 83 of the support plate '53 and at their opposite ends to machine screws 8 l8 lthreaded within opposite outer sides of the flange 65. R0- tation of the sleeve 68 will thus rotatably drive the tool support 68, and where the cam 64 is of an irregular or oval formation said tool support will rectilinearly move along the gibs til-61 as itis rotatably driven by the sleeve to, following the contour of said cam, which may be in the form of the periphery of the corn pad being beveled. It is obvious that where the corn pads are circular, as shown in Figure 11, the cam 64 will be of a circular formation and that with such a cam there will be no translational movement of the tool support with respect to the sleeve 68.

The block '15 as shown in Figure 6 has an inclined plane undersurface 85, herein shown as being perpendicular to the desired bevel of the pad although it may be at other angles, and as having a knife block 36 adjustably secured thereto. As shown in Figures 6 and 10 a plurality of apertures 3l8'= are formed in the bottom of the inclined surface 85, any one of which may receive a pivotal pin 88 extending inwardly from the knife block 85, to form a pivotal support therefor. The knife block 86 has a sector plate 89 formed integrally therewith and abutting the bottom of the inclined surface 85. The sector 89 has an arcuate slot 98 extending therethrough, through which passes a machine screw 9 l threaded in the block 15 and adjustably securing said knife block and rotatable knife i l in position on the inclined surface 2:85. It should benoted with reference to Figures land lONtha-t a pluralityof threaded apertures -92-:92-enter the-block from the inclined surface ;85, any one of ww-hichmay have the machine screw SI threaded therein,-to adjust the rake of the .knife [I4 with respectto the felt pad being cut, the threaded aperture being used depending upon which aperture :81 the pin 88 is inserted.

The knife block ,8'5, ,as herein shown, has two spaced bearings $13-53 :mounted therein and forming a bearing support fora-knifez shaft v94,0n which a knife I4 is mounted. -.A collar 95 is=secured to the outer end of the shaft :94 to .hold said shaft within the bearings .9'3-.9-3 while i3, pulley $6 is mounted adjacentthe-.oppositeend of said shaft. Said pulley-has. ahub -9'labutted by the inner face of a knife I4. The knife I4 is secured to said shaft, for rotation therewith, as by a Washer and nut 99 threaded on the lower enel'ofv saidshaft and abutting a hub I410 of said disk knife.

The .rotary knife I4 is thus rotatablyiiournaled on the knife block .86 with: its periphery inclined at the angle of the desired bevel of the pad and is fed to follow the periphery of the ,padfiduring-zthe beveling operation by rotatable :movementof the sleeve fill and .by translational .rnovement of the tool support 69 with respect thereto effected .by engagement of the cam-follower I9 rotating with said tool support with the stationary :cam 64, formed to conform to the periphery of the pad being .beveled.

The rotary knife I 4 is shown in Figures -6 and 10 as being in the form ofa disk, the loweriace of which is fiat and the upper face of which is beveled, sharpening the periphery of the disk to form a sharp rotary knife-like cutting-edge. The knife I l is preferably formed from hardened tool steel, and the angle of the .bevelededge thereof may vary, depending .upon theangle .of the .desired bevel of the .felt pad, and the types of felt being beveled. A ten degreebevelhas been'found to be especially suitable for beveling oval pads. Also both sides of the cutter may be beveled if desired.

The drive from the motor 21 to the rotary knife M includes .a pulley .llll journaled .on the sleeve .60 .on a bearing I03. A belt {05 connects a motor pulley I06 on .a lower end of the .motor shaft 28 with the pulley IlII, to .rotatably drive said pulley. The pulley Jill .is herein shown as having a pulley I09 disposed therebeneath and formed integrally therewithandadapted to be engaged by and drive a spring belt MI] made from a closely wound coiled tension spring. The .belt I Ill has sufficient yieldability to maintain an efficient drive to the pulley .96 and rotary cutter M in all positions of translational movement of the tool support 69 with respect to the sleeve til.

The spring belt IIE! extends horizontally from the pulley I09, over direction changing idler pulleys I I2-I I2 and downwardly and inwardly therefrom to and around the pulley 96 on the shaft 94. The direction changing idlers -I I2---'I I2 are each mounted between the furcations of bifurcated support members I'I'3II3, secured to the upper surface of the flange GI and projecting outwardly therefrom. The support brackets II'3-I 13 are each inclined at theangle of inclination taken by the belt as it passes from the idlers I I2I I2 to the pulley 95, and support their respective pulleys at such angles of inclination. A belt guide I It is mounted on the bottom of the flange SI as by machine screws I I5I I5.

Ihe b'elt g-guide H4 is herein shown as being of a stra'p-like formation, made in two overlapping pieces, each of which engages one run of the underside of the belt and maintains sufficient tension on the belt to hold it in engagement with the idlers II2-I I2 and the driven pulley 86. It will here be noted that the pulley 96 is of relatively small diameter compared with the drive pulley I 09, so as to step up the speed of'the knife-I4 to a higher rate of speed than the speed of rotation of the motor 21.

The drive to the sleeve =60, rotatably feedingthe cutter disk It in the path of the periphery of the felt .pad to be beveled, includes a chain and sprocket drive 'I'ItB driven fromthe upper end of the shaft .28-of the motor 21 through a suitable speed reducer, herein shown as being built into the'motor and not shown or described in detail since it may be of any well known form 'and is nopart of my present invention. The chain and sprocket drive I It serves to drive a transverse worm shaft II I, journaled intermediate its ends in a bearing bracket IIiS depending from the support plate 25. A'worm H9 on theinner end of the shaft II I meshes with and drives a worm gear I26 mounted on the sleeve 69 above the pulley Ill-I, and secured to said sleeve as by set screw I2I.

A rotata'blework supporting table I23 is mounted on the top surface of the base It on a vertical spindle I224. The table I23, as herein shown, has a plurality of work carrying mandrels I25 projecting upwardly from its top surface, and shown as being located apart, although they need not be :so located. Each of said mandrels has a shouldered upper portion I26 adapted to have a felt corn .pad mounted thereon and to hold it in position during the beveling operation. If desired an adhesive or abrasive member may be placed on the shoulder I26, to restrain the pad from rotation, although where the fit of the pad is snug, this :is-not necessary.

A dog I 21, ,pivotally mounted on the top sur- I face of the base IS on a piovtal pin I29 is provided to index the table I23 (see Figure 3). The dog I Z'I'is engageable with any one of a plurality of notches Hid-I30 formed in the periphery of the table I23. An-arm I3'I projects from the dog I2! to permit disengagement of said dog from the respective notch I3lI by hand. A tension spring I32, connected between the table and the lever arm I3I, intermediate the ends thereof, is provided to hold the dog I2! in engagement with the required notch.

A depending indexing bar I33 is provided to positively hold the table in position during the beveling operation. Said bar is secured to and depends from a bracket I 34, -herein shown as projecting outwardly from the support bracket 25. The indexing bar I33 has a reduced lower end portion adapted to register with any one of a plurality of apertures I35'I35 formed in the base plate I6, upon lowering movement of the knife I4 into position to bevel the felt pad (see Figures '5 and 6) In operation of the machin the mandrels I 25 may first be loaded with pads, the spring 13 holding the rotary knife I4 'to an elevated inoperative position. The table I23 may then be turned un til the "dog I27 engages a notch I3ll, indicating that a pad is in the correct position for beveling. The proper cam 6'4 being mounted on the lower end of the spindle 5'6 and the proper knife being mounted on the shaft 94, the motor 21 may then be started. At "the same time pressure may be exerted on the pedal of the foot lever 12 by the foot, to engage the indexing bar 133 with the respective aperture [35 and to lower the rapidly rotating and orbitally traveling knife Hi into beveling engagement with the top surface of the felt. Downward movement of the rotary knife 14- and the depth of the bevel is limited by the upper knurled stop nut 32. engaging the lug 34 (see Figure 2). The rapidly rotating knife Hi following the contour of the pad will thus cut the outer edge of the top surface thereof at the desired angle and depth along the entire periphery of the the pad, as shown in Figure 11. When beveling of the first pad is completed, the foot may be released from the pedal of the foot lever IE to allow the spring d3 to raise the knife it out of engagement with the felt. The dog t2? may then be released and the plate I23 turned to position another felt in the proper aligned relation with respect to the beveling knife M. The dog engaging the proper indentation l3! to index the table l23 until positively held in position by the indexing bar m3, the foot may be engaged with the pedal of foot lever i2 to again bring the indexing bar 333 into engagement with an aperture I55 and bevel the top surface of another felt pad. As one pad is beveled it may be removed from its supporting mandrel during the beveling operation of the next pad and another pad placed on said mandrel, thus affording a substantially continuous beveling operation.

It may be seen from the foregoing that a new and improved method and apparatus has been provided for beveling felt pads by cutting the upper outer surface thereof at an angle by a rapidly rotating knife-like cutter moving transversely of the pad at the angle of the bevel at a high velocity and at the same time, following the contour of the periphery of the pad, making it economically feasible to suppl beveled corn or protective pads for use by the general public. It may further be seen that the beveling of the pad is attained due to the high velocity of the inclined knife-like rotating cutter following the contour of the pad, and that the apparatus may be adapted to cut felt pads of various desired contours merely by the substitution of cams having cam surfaces conforming to the contour of the pad to be beveled. It may also be seen that various types of cutters may be substituted to suit various conitions and grades of felt, and that the angle of th knif with respect to the pad may likewise be varied in accordance with the desired bevel of the pad, the shape of the knife used and the softness of the material being beveled. It may further be seen that the apparatus is of a simple and efficient construction, which may readily and safely be operated at high speed production rates by relatively unskilled operators, with no attention from the operator, except to remove and load the pads, and bring the next succeeding pad into position to be beveled.

It may be understood that modifications and variations may be effected without departing from he scope of the novel concepts of the present invention.

I claim as my invention:

1. In an apparatus for beveling felt pads, a frame, a table having a mandrel thereon adapted to support a pad for beveling, a spindle mounted on said frame in vertically spaced relation with respect to said table, a support member journalled on said spindle for movement thereabout, a motor on said frame, a drive connection from said motor to said support member, a tool support depending from the bottom of said support member and supported and guided thereon for rectilinear movement with respect thereto, a cam and follower interposed between said spindle and tool support, one being stationary and the other being movable about the other, yieldable means holding said cam and follower in engagement with each other and effecting movement of said tool support in a path conforming to the perlphcry of the pad to be beveled upon rotational movement thereof with respect to said spindle, a rotary knife mounted on said tool support for rotation transversely of the surface of the pad to be beveled and in the plane of the desired bevel of the pad, and a drive connection from said motor to said knife including a member coaxial with said spindle, and a spring belt driving said knife from said coaxial member in all positions of relative movement between said knife and said coaxial member.

2. In an apparatus for beveling felt pads, a frame, a table having a mandrel thereon adapted to support a pad for beveling, a spindle mounted on said frame in vertically spaced relation with respect to said table, a support member journaled on said spindle for movement thereabout, a motor on said frame, a drive connection from said motor to said support member, a tool support depending from the bottom of said support member and supported and guided thereon for rectilinear movement with respect thereto, a cam and follower interposed between said spindie and tool support, one being stationary and the other being orbitally movable thereabcut, yieldable means holding said cam and follower in engagement with each other and effecting movement of said tool support in a path conforming to the periphery of the pad to be beveled upon rotational movement of said support memher with respect to said spindle, a rotary knife mounted on said tool support for rotation in the plane of the desired bevel of the pad, a pulley journaled for rotation about an axis coaxial with the axis of rotation of said spindle, and rotatably driven thereabout by said motor, a drive connection from said motor to said pulley, another pulley coaxial with the axis of rotation of said knife and disposed at an acute angle with respect to said first pulley for rotatably driving said knife, an extensive spring belt connecting said pulleys in driving and driven relation with respect to each other, and guide means rotatably movable with said support member and guiding said belt from one pulley to the other, to rotatably drive said knife in all positions of relative movement of said knife with respect to said first pulley.

3. In an apparatus for beveling felt pads, a frame, a table having a mandrel thereon adapted to support a pad for beveling, a spindle mounted on said frame in vertically spaced relation with respect to said table, a support member journaled on said spindle for movement thereabout, a motor on said frame, a drive connection from said motor to said support member, a tool support depending from the bottom of said support member and supported and guided thereon for translational movement therealong, a cam and follower interposed between said spindle and tool support, one being stationary and the other being orbitally movable, yieldable means holding said cam and follower in engagement with each other and effecting movement of said tool support in a path conforming to the periphery of the pad to be beveled upon rotational movement of said support member with respect to said spindle, a rotary knife mounted on said tool support for rotation in the plane of the desired bevel of the pad and movable transversely of the face of the pad to be beveled, a drive connection from said motor to said knife for rotatably driving said knife in all positions thereof with respect to said spindle, and operator operated means operatively connected with said tool support for vertically moving said tool support and knife downwardly into engagement with the pad to be beveled and spring means for moving said knife out of engagement with a pad to be beveled upon the release of said operator operated means.

4. In an apparatus for beveling felt pads, a frame, a table adjustably mounted thereon, a plurality of mandrels on said table for supporting the pads for beveling, a support member rotatably mounted on said frame and spaced vertically with respect to said table, a motor on said frame, a drive connection from said motor to said support member, a tool support depending from the bottom of said support member and supported and. guided thereon for rectilinear movement with respect thereto, a cam and follower for rectilinearly moving said support with respect to said support member, yieldable means holding said cam and follower in engagement with each other and effecting movement of said tool support in a path conforming to the periphery of the pad to be beveled upon rotational movement of said support member, a rotary knife mounted on said tool support for rotation transversely of the face of the pad to be beveled and in the plane of the desired bevel of the pad, a drive connection from said motor to said knife for rotatably driving said knife in all positions thereof with respect to said spindle, means under control of the operator for vertically moving said tool support and knife downwardly into engagement with the pad to be beveled, spring means disengaging said knife from the beveled pad, and an interengaging connection between said tool support and table engageable upon movement of said cutter downwardly into working engagement with the pad to be beveled, to hold said table and the pad to be beveled in aligned position with respect to said knife.

5. In an apparatus for beveling soft felt pads, a frame, a table adjustably mounted on said frame and having a plurality of mandrels thereon for supporting the pads for beveling, a spindle mounted on said frame above said table, a support rotatably mounted on said spindle, a motor for rotatably driving said support, a tool support depending from the bottom of said support and supported and guided thereon for rectilinear movement with respect thereto, a cam on said spindle and a follower on said tool support for rectilinearly moving said tool support with respect to said table upon rotation of said tool support, a knife rotatably journalled on said tool support for rotation transversely of the face of the pad to be beveled and. in the plane of the desired bevel of the pad, extensible drive means for rotatably driving said knife at substantially the speed of said motor in all relative positions of said knife with respect to said motor, operator operated means for lowering said support and knife into pad beveling position, spring means returning said knife out of pad beveling position, and an indexing bar secured to said support for vertical movement with said knife and having interengagement with said table, to align said table and a mandrel thereon with said knife upon movement of said knife into a pad beveling position.

6. In an apparatus for beveling felt pads, a frame, a table rotatably mounted on said frame, a plurality of mandrels on the top of said table for supporting the pads for beveling, a spindle mounted on said frame, a support rotatably mounted on said spindle and spaced vertically with respect to said table, a motor on said frame, means driven by said motor for rotatably driving said support, a tool support depending from the bottom of said support and supported and guided thereon for rectilinear movement with respect thereto, a cam secured to said spindle, a follower on said tool support engageable with said cam, a spring engaging said follower with said cam, a knife rotatably journalled on said tool support for rotation transversely of the face of the pad to be beveled and in the plane of the desired bevel of the pad, means driving said knife from said motor at substantially the speed thereof comprising a pulley journalled on said tool support for rotation about the axis of said spindle and driving by said motor, an extensible spring belt, a pulley secured to said knife for rotatably driving said knife, means guiding said belt from one pulley to the other, a foot pedal, link and rack means operated by said foot pedal and operatively connected with said support, for lowering said support and knife into pad beveling upon operation of said foot pedal, a spring operatively connected with said foot pedal for raising the knife from said mandrel upon release of foot pressure from said pedal, means indexing said table, and an indexing bar secured to said support for vertical movement with said knife and having interengagement with said table to align said table and a mandrel thereon with a pad to be beveled upon movement of said knife into a pad beveling position.

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