US2029304A - Trimming machine - Google Patents

Description

Feb, 4, 1936. L. J. BAZZONI TRIMMING MACHINE Original Filed June 14, 1933 v 3 Sheets-Sheet 1 Feb. 4, 1936. L. J. BAZZONI 2,029,304

-TRIMMING MACHINE Original Filed June 14, 1933 S Sheets-Sheet 2 //v vE/v ma Feb. 4, 1936. L. J. BAZZONI TRIMMING MACHINE 3 Sheets-Sheet 3 Original Filed Jim 14, 1953 7 m 2 6 w I & X

Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE 2,029,304 TRIMIVIING Application June 14, 1933., Serial No. 675,794

Renewed July 15, 1935 43 Claims.

This invention relates to machines for :skiving or trimming flexible material and is illustrated as embodied in a machine particularly suitable for slaving a margin of a cover which projects beyond an edge of a heel to which the cover has been applied.

In order to perform this and other skiving operations the machine, in accordance with one feature of the invention, is provided with an 10 anvil for supporting the projecting margin of a flexible cover attached to a heel and with a cooperating rotary tool having on its periphery projections for removing stock from the margin by a series of stock-removing operations which 15 progress toward the edge of the margin. In the illustrated construction, the tool is a rotary cutter having teeth with edges which extend continuously across the periphery of the cutter, and the anvil has its sole-engaging surface disposed 2 substantially in tangential arrangement with re-- spect to the path of movement of the edges of said teeth and forms therewith :a V-shaped opening into which the margin of the flexible cover may be introduced to skive the same to a feather 25 edge.

In order to prevent the margin of the cover from being sucked or drawn toward the cutter whereby there would be a tendency to cut through or too deeply into the margin, the cutter, in

35 accordance with another feature of the invention, is provided with teeth each of which has a face which is but slightly undercut, is skewed with respect to the plane of rotation of the cutter and terminates in a sharp edge. The abrupt angle between the edges of the teeth and their undercut faces tends to cause said edges to scrape rather than to produce a true wedge cut and thereby to lessen the tendency, which would otherwise exist, for the teeth to bite into the material; and this tendency to bite in is further lessened by the skewing of the teeth whereby a draw scraping cut is produced with a minimum amount of pull on the material;

It is desirable that the margin of the cover V-shaped opening formed between the path of the scraping teeth and the anvil. To this end in accordance with another feature-of the invention there is provided a surface which forms with an 50' opposed surface of the anvil a throat for facilitating the feeding of the margin into the V- shaped opening. In the illustrated construction the cutter is provided with a conical surface adjacent to the ends of the teeth whereby the should be bent toward the anvil as it enters the I I conical surface intersects the undercut faces of the teeth to form inclined edges which engage the margin and bend it progressively toward the anvil.

The-illustrated machine is provided with a gage for engaging the covered face of the heel as well as with a gage which is shown asiormed integral with the anvil and is constructed and arranged toengage the face beyond which the margin projects, the gages serving to guide the heel as the projecting margin of the cover is fed between the cutter and the :anvil thereby to skive the margin preparatory tointurningthe'same around the edge and upon the uncovered face of the heel. In :order to vary the angle of the :skive and in accordance with another feature of the invention 5 the gage which engages the face above which the cover projects is mounted :for angular adjustment about an axis which is arranged substantially parallel with respect to the axis of rotation of the cutter and extends through the bottom of c the V-shaped opening.

These and other features of the invention, including certain details of construction and combinations of parts, will be described as embodied in an illustrated machine and pointed out in the appended claims.

In the drawings,

Fig. 1 is a perspective view of the illustrated machine;

Fig. 2 is a side elevational view of the machine;

Fig. 3 shows .a sectional view of the machine taken along .line III-III of Fig. 2;

Fig. 4 is an enlarged view of the operative parts of .the machine in the process of skiving the margin of .a cover projecting above the .attaching face of a .heel;

.Fig. 5 is .a View corresponding to Fig. 4 but showing the machine in the process of skiving the margin of the cover which projects beyond the breast of the heel;

Fig. 6 is a detail plan view taken along line VI'VI of Fig. 4;

Fig. 7 is a perspective view of the illustrated scraping cutter; and

Fig. 8 is a perspective view of a heel the skived margins of the cover of which have been laid upon the breast and the attaching faces of the heel. I

The illustrated machine may be used to .skive or to bevel the projecting margins .20 and 22 of a flexible cover '24 which has "been cemented to a heel .26 preparatory to .inturning such margins upon the breast and the attaching faces .28 and 3D,.respective1y, 0f the .heel. The illustrated heel is of the Louis type the breast face 28 of which is sharply curved and terminates in a forwardly extending lip 32.

The margins 26 and 22 of the cover are skived by a rotary cutter or tool 34 which is constructed and arranged to force the margins 26 and 22 against an anvil 36 and then to bevel the margins by a series of scraping cuts which progress toward the edge of the margin; The heel 26 to which the cover 24 has been applied is guided past the cutter 34 for presenting the projecting margins 26, 22 to the same by a gage 38 arranged to engage the covered face .ofthe heel adjacent to the edge beyond which the margin of the cover projects and a gage 46 illustrated as formed integral with the anvil 36 and arranged to engage the heel face, beyond which the margin to be skived projects, adjacent tosuch edge. 1

The cutter or tool 34 is forced by a-nut42 (Fig. 2) againsta flange 44 (Fig. 1) of a shaft 46 which is journaled in a pair of spaced bearings 48 of a standard 56. Power is supplied to the shaft 46 by a belt 52 arranged in driving relation witha pulley 54 which is keyed to the shaft 46.

In trimming fibrous material such for instance as leather by the use of a cutter provided with sharp cutting edges having a large angle of undercut or top rake it has been found that the cutter has a tendency to suck the leather and therefore to out completely through the same at a steep angle to the plane of the material. When such a cutter is used it is difiicult to control the bevel to which the margin is trimmed. Accordingly, the cutter or tool 34 of the illustrated ma- 7 chine is provided with a plurality of circumferentially spaced teeth 56 each of which is provided with a face 56 (Fig. '7) having a small angle of top rake. The face is also skewed with respect I to the plane ofrotation of the cutter and terand, as above stated, are suitably undercut to force the margin positioned in the V-slrraped opening 66 against the relatively flat portion ,62 of the anvil 36 toreduce such margin toa feather edge. The axial extent of the edge 66 of each of the teeth 56 is greater than the maximum lengthwise feed of the margin during the interval required to make three successive cuts in order to insure that the cuts shall overlap each other and to provide a bevel which is of substantially uniform thickness throughout the length of the margin.

The factor of penetration of the edge 66-should be less than that required to suck up the cover margin as above described, and the factor of scrape should not be so great as to tear the margin which is folded over the rim ofthe attaching face or one of the breast edges of the heel. The term scraping cutter as used herein is intended to define a cutter which may trim by a true scraping action or which may trim partly by scraping action and partly by incisive penetration. It has been found preferable to provide a cutter the cutting face of which has an angle 4 of top rake of a magnitude sufficient to have a slight repellent effect upon the. cover margin thereby to insure that there is no tendency for the cutter to suck up such margin.

To provide for feeding the margin into the V- shaped opening 66 the forward part 16 (Fig. 6) of the cover-supporting face 64 of the anvil 36 is curved away from the cutter 34, and the cutter includes a conical face 12, the opposing faces 16 and '12 forming a throat or recess 74 (Fig. 6) which tapers in the general direction of the axis of rotation of the cutter and toward the V-shaped opening 66.

vIt is desirable to have the margin in close proximity to the supporting face 64 of the anvil 34 as the edges 66 force the margin against the anvil and skive the margin: With this in view the conical surface 12 of the cutter 34 is provided with a plurality of beating edges 16 which are shown as continuations of the cutting edges 66. Such an arrangement is especially useful when skiving the margins 22 of the cover projecting above the attaching face 36 (Fig. 4) of the heel since such margins when first presented to the machine are disposed at a substantial angle to the cover-supporting face 64 of the anvil 36. The projecting margin 26 has a tendency to bend toward the breast face 28 of the heel (Fig. 5) and in skiving such margin the forward surface 16 of the anvil 36 which is curved in the direction of feed progressively straightens out the margin as it is fed into the throat l4 and into the V- shaped opening 66 (Fig. 2). 1

In order to facilitate the feeding of the margin into the V-shaped opening 66 the portion of the;

anvil 36 which opposes the leading part of the edge 66 is slightly curved away from the cutter to provide a notch '58 (Fig. 6). Moreover, the leading portion of each of the edges 66 is rounded off to avoid the forming of a corner which has a tendency to dig into the margin, especially if such margin has not been beaten against the anvil, and also to facilitate the feeding of the margin into the V-shaped opening 66. It will be noted that by providing skewed edges 66 a draw out is produced and. such an arrangement obviates the excessive tensioning of the cover margin by the cutter 34. Moreover, by skewing the edges 66 the cover margin is automatically fed past the cutter 34 due to the thrust of the edges 66 in a direction parallel to the axis of rotation of thecutter. For

the purpose of further assisting the operator in presenting the margin to the cutter 34 without such margin being knocked away by'the cutter as it is first presented thereto, it has been found advantageous to remove every fourth tooth.

In order to permit the heel to be swung without interference during the skiving of the margins 26 of the cover which project beyond the the heel from engaging the cutter 34 is provided with a heel-engaging face 84 (Fig. 1) of fiat construction to brace the heel as it is moved past the cutter 34. It will be noted that the forward part of the heel-engaging edge 86 of the gage 46 (Fig. 6) curves away from the cutter 34 in order to insure that, as the heel is moved past the cutter.34, it will be supported by such edge. The edge 86 may, therefore, be said to be U-shaped or outcurved in two directions disposed at substantial angles to each other. Y.

In order to vary the angle of the bevel formed on the margins, the anvil 36 may be adjusted about an axis which is disposed in substantially parallel relation with the axis of rotation of the cutter 34 and which passes through the bottom of the V-shaped opening 14. Such adjustment may be quickly effected by providing the anvil 35 with a depending flange 86 (Figs. 1 and 2) shaped for adjustment along an arcuate guideway 88 of a housing 90 upon releasing a clamp screw 92 which is in threaded relation with the anvil 36 andis provided with an enlarged head arranged for engagement with the housing.

To vary the space formed between the gages 38, 40 a carrier portion 94 of the gage 38 may be adjusted circumferentially of the cutter 34 along a guideway 96 (Fig. 1) and maybe clamped to the housing 90 by a screw 98 which is in threaded relation with the housing 90 and is of suitable size to pass through a slot mu (Fig. 1) in the carrier portion 94. Adjustment of the gage 38 toward and away from the axis of rotation of the cutter may be carried out by turning a screw I02 which is in threaded relation with the carrier portion 94 and limits the outward swinging movement of an offset portion I04 of the gage 38 under pressure of a strong spring 16. A look nut I08 mounted upon the screw Hi2 secures the screw in adjusted position upon the carrier portion 94. It is desirable to adjust both gages 38, 40 relatively to the cutter 34 in. order to bring the anvil 36 into substantially tangential relation with respect to the path of movement of the edges 60 of the cutter. Accordingly the housing 90 is provided with a lug H (Fig. 1) having a tongue I 12 mounted for sliding adjustment along a guideway of the standard 51!. The housing 90 may be adjusted relatively to the cutter 34by releasing a pair of clamp screws H4 and then turning an adjusting screw H6. When the proper adjustment has been made the clamp screws H4 are turned to clamp the housing 90 to the standard 50. A spring I 18 carried by the screw H6 facilitates the fine adjustment of the housing 90 relatively to the standard 50 since it prevents movement between the housing 90 and the main frame 50 due to backlash of the screw H6.

The housing 90 includes a front plate H20 (Fig. 2) which is formed integral with a suctionpipe l2! for removing chips and dustresulting from the skiving of the projecting margins of covers trimmed in the machine.

In order to trim the projecting margins 2!! the operator rests the side and breast faces of the heel against the gages 38 and 40, respectively, as illustrated in Fig. 4. The heel is then moved from right to left (Fig. 1). As the cover margin is moved into the throat 14 the beating edges 16 of the cutter 34 straighten out the margin and force the same toward the cover supporting face 64 of the anvil 36. The cover is then fed into the V- shaped opening 66 to cause the edges 6|] to skive material from the margin by a series of draw scraping cuts progressing toward the edge of the margin. As above stated, in skiving the cover margins which project beyond the breast of the heel the forward curved portion of the anvil 36 directs the margins into the V.-shaped opening 66.

Although the invention has been set forth vided with a rotary tool having on its periphery stock removing projections of a particular shape, it should be understood that the invention is not limited in the scope of its application to the particular use or the particular tool which have ,5 been described.

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

l. A trimming machine comprising an anvil 10 for supporting a projecting margin of a cover which is secured to a heel, a tool provided with a plurality of projections which are constructed and arranged to skive the projecting margin supported by the anvil by a series of cuts which progress generally toward the edge of said margin, and means for operating the tool.

2. A trimming machine having, in combination, a rotary tool having a plurality of elongated stock removing edges, and an anvil provided with 20' a face which forms with the surface of revolutionofsaid edges an opening which is V-shaped in two directions disposed at substantial angles to each other.

3. A trimming machine comprising a stationary anvil for supporting a projecting margin of a cover which is secured to a heel, a rotary tool provided with a plurality of edges which are constructed and arranged to skive the projecting margin supported by the anvil by a series of cuts i which progress generally toward the edge of said margin, and means for operating the tool.

4. A trimming machine having, in combination, a tool provided with a plurality of stock removing projections, an anvil, means for positioning the projecting margin of a cover attached to a heel with relation to the anvil, and means for moving the tool past the anvil in one direc-' tion to cause said projections successively to wipe the margin against the anvil and to skive the 0 same toward the edge of said margin.

5. A trimming machine having, in combination, an. anvil for supporting a margin of a piece of flexible material, a rotary tool arranged substantially in tangential relation with relation to the anvil and having a plurality of edges each of which comprises a trimming portion the path of movement of which forms a V-shaped opening with the anvil and a beating portion the path of movement of which forms with the anvil a throat for directing the margin into the V-shaped opening, and means for operating the tool to cause said edges to move toward the edge of said margin supported by the anvil thereby to skive said margin.

6. A trimming machine having, in combination, an anvil for supporting'a. flexible heel cover margin which projects beyond one of the edges of a face of a heel to which the cover has been applied, a rotary cutter comprising a plurality of teeth constructed and arranged for cooperation with the anvil to skive said margin by a series of successive cuts progressing toward the edge of said margin, and means for positioning the heel relatively to the cutter to determine the location of the trimming cuts.

7. A trimming machine having, in combination, an anvil for supporting a flexible heel cover margin which projects beyond one of the edges of a face of a heel to which the cover has been applied, a rotary cutter comprising a plurality of edges constructed and arranged to skive said margin supported by said anvil by cuts which progress toward the edge of said margin, and gages constructed and arranged to engage simul- I taneously both thecovered face and another face of the heel thereby to position the heel relatively to the cutter as the margin of the cover is moved past the cutter.

8. A trimming machine having, in combinationfan anvil for supporting a flexible heel cover margin which projects beyond one of the edges of a heel to which the cover has been applied, a rotary cutter comprising a plurality of sharp edges constructed and arranged for cooperation with the anvil to skive said margin by a plurality of cuts which progress toward the edge of the margin, and gages spaced to form an opening for receiving the margin of theicover and arranged simultaneously to engage the heel adjacent to said edge thereby to position the heel as the same is moved past the cutter for determining the location of the trimming cuts.

9. A trimming machine having, in combination, a rotary trimming member, and a stationary anvil arranged to brace a margin of flexible sheet material against the periphery of the trimming member, said trimming member having a circular series of peripheral teeth provided with skewed stock removing edges, the member and the work bracing surface of the anvilbeing arranged to form a'work-receiving opening which tapers both in the direction of rotation of the trimming member and also in a directionsubstantially parallel to the axis of rotation of said member. 7

10. A trimming machine having, in combination, an anvil for supporting aflexible heel cover margin which projects beyond one of the edges of a face of a heel to which the cover has been applied, a cutterhaving a plurality of circumferentially spaced teeth provided with skewed faces terminating in edges .and constructed and arranged progressively -to remove material supported by the anvil by scraping cuts thereby to skive the marginjandmeans constructed and. arranged to position the heel relatively to the cutter for determining the location of said cuts.

11'. A trimming machine having, in combination, an anvil for supporting a flexible heel cover margin which projects beyond one of the edges of a face of a heelto which the cover has been applied, a gage for engaging the covered face of the heel, a gage for engaging the face beyond which the cover-projects, and a rotary cutter provided with a plurality of circumferentially spaced teeth having faces each of which is skewed and terminates in a sharp edge, said edges being constructed and arranged to skive the covered margin supported by said anvil to a feather edge by a plurality of scraping cuts which progress toward the edge of said cover margin.

12. A trimming machine having, in combination, a rotary cutterfan anvil having a worksupporting face arranged in tangential relation with respect to the cutter to form a V-shaped opening which tapers circumferentially of the cutter, said cutter being provided with scraping teeth including portions which cooperate with portions of the anvil to skive a margin of a cover fed intothe opening and being provided with other portions for bending portions of the cover margin against the work-supporting face prior to introducing such portions into said opening, and means for guiding said projecting margin past the cutter to skive the same to a feather edge by a series of cuts.

13. A trimming machine having, in combination, a rotary cutter, an anvil having a worksupporting face. arranged in substantially tan gential relation with respect to the cutter to form a V-shaped' opening whichtapers circumferentially of the cutter, said cutter being provided series of cuts which progress toward the edge of the cover, said edges being skewed with respect to the plane of rotation of the cutter to expedite the feeding of the margin of" the cover past the cutter.

14. A trimming machine having, in combina-' tion, a rotary cutter provided with a plurality of circumferentially'arranged teeth each of which is provided with a skewed face terminating in a scraping edge, an anvil arranged in tangential relation with respect to the path of movement of the scraping edges to' form an opening which is tapered in the general direction of the movement of the scraping edges adjacent to said anvil, portions of the scraping edge and the anvil being arranged to skive a marginof a flexible cover which projects beyond an edge of a heel to aface of which the cover has been applied, and edges continuous with the scraping edges the path of rotation of each of which forms with another portion of s'aid'anvil a throat for guiding said margin into the opening preparatory to skiving the same, and means for guiding the heel past the cutter.

15. A trimming machine having, in combination, a rotary tool provided with a plurality of stock removing edges each of which comprises a portion lying substantially in the surface of a cylinder and a plurality of edges which are con tinuous with the stock-removing edges and are curved toward the axis of rotation of the tool, and an anvil having a surfacewhich is substantially tangent to the path of movement of said stock removing edges and forms a V-shaped opening therewith,'said anvil being provided with a portion which extends away from the tool and forms with said second-named edges 2. throat which tapers in the general direction ofthe axis of rotation of the tool and facilitates the feeding of a marginal portion of a piece of covering material into the V-shaped opening therebyto skive the margin by a series of cuts progressing toward the edge of said margin.

16. A trimming machine having, in combination, a rotary cutter provided with a plurality of for guiding the heel past the cutter to cause the projecting margin to be beaten down toward said face 'as it is fed into the throat and to cause the cutter to skive the margin as it is moved through the V-shaped opening by a series of cuts which progress toward theedge of the margin.

17. A trimming machine having, in combina-' tion,, a rotary cutter provided with a plurality of circumferentially arranged scraping edges which lie in the surface of a cylinder and are skewed, an anvil disposed in tangential arrangement with respect to the path of movement of said edges to provide a V -shaped opening for receiving the margin of a piece of. flexible material, means for operating the cutter to cause the same to skive the margin supported by said anvil, and means including a portion of the anvil to facilitate the feeding of said margin into the V-shaped opening preparatory to skiving the same.

18. The combination with a support for a margin of a piece of flexible material, of a rotary member provided with a plurality of edges which are skewed with respect to the plane of rotation of the member and are arranged substantially to engage the support successively upon rotation of the member, said member also having a series of edges which are constructed and arranged to bend the margintoward the support preparatory to skiving the margin of the cover.

19. The combination with an anvil for supporting a margin of a piece of flexible material, of a rotary member provided with a plurality of edges lying in a cylindricalsurface and skewed with respect to the plane of rotation of the member, said member also comprising a series of edges which lie in a conical surface and are arranged to bend the margin toward the anvil preparatory to skiving the margin.

20. The combination with ananvil for supporting a margin of a piece of flexible material, of

a rotary member provided with a plurality of scraping edges lying in a cylindrical surface and skewed with respect to the plane of. rotation of the member, said member also comprising a series of edges which lie in a conical surface and are substantial continuationsof the scraping edges of the cutter, said last-named series of edges being constructed and arranged to bend the margin toward the anvil preparatory to skiving the margin by a series of cuts which progress toward the edge of said margin.

21. A trimming machine having, in combination, an anvil for supporting a margin of a piece of flexible material, a rotary tool arranged sub-- -stantially tangentially with relation to the anvil and having a plurality of edges each of which comprises a trimming portion the path of movement of which forms a V-shaped opening with ,the anvil, and means for operating the tool to cause the trimming edges to move toward the edge of said margin thereby to skive said margin to a feather edge, said anvil being angularly adjustable about an axis extending substantially parallel to the axis of rotation of the cutter and passing substantially through the bottom of the V-shaped opening.

22. A trimming machine having, in combination, an anvil for supporting a flexible cover margin which projects beyond one of the edges of a face of a heel to which the cover has been applied, a rotary cutter comprising a plurality of sharp edges constructed and arranged for cooperation with the anvil to skive said margin by a series of cuts which progress toward the edge of the marengages the covered face of the heel being adjustable relatively to. the anvil.

23. A trimming machine having, in combination, an anvil for supporting a flexible cover margin which projects beyond one of theedges of a heel to which the cover has been applied, a rotary cutter comprising a plurality of sharp edges constructed and arranged for cooperation with the anvil to skive the margin by a plurality of cuts which progress toward the edge of the margin, and gages spaced to form an opening for receiving the margin of the cover and located at opposite sides of the projecting margin for simultaneously engaging the heel adjacent to said edge thereby to position the heel as the same is moved past the cutter for determining the location of the trimming cut, said gages and said anvil being mounted for adjustment as a unit relatively to the cutter.

24. A trimming machine having, in combination, an anvil for supporting one of the margins of a piece of flexible material, a rotary tool arranged substan-tially tangentially with respect to the anvil and provided with a plurality of stockremoving projections the path of movement of which forms a V-shaped opening with the anvil, and means to facilitate the feeding of the margin in the general direction of the axis of rotation of. the tool through the V-shaped opening.

25. A trimming machine comprising a rotary trimming tool and astationary anvil arranged to brace a margin of flexible sheet material against the trimming pressure of the tool, said tool having a circular series of peripheral teeth provided with skewed scraping edges, and means to facilitate the feeding of the margin in the general direction of the axis of rotation of the tool between said edges and the anvil.

26. The combination with an anvil for supporting a margin of a piece of flexible material, of a rotary cutter provided with a plurality of scraping edges lying in a cylindrical surface and skewed with respect to the plane of rotation of the cutter, and means to deflect the margin for guiding the same between the anvil and the cutter preparatory to skiving the same. i

27. The combination with an anvil for supporting a margin of a cover which projects beyond an edge of a heel to which the cover has been applied, of a rotary member provided with a plurality of scraping edges lying substantially in a cylindrical surface and skewed with respect to the plane of rotation of the member, said member also comprising a series of edges which lie in a conical surface and are arranged to bend the margin toward'the anvil preparatory to skiving the margin, and gages for guiding the heel past the rotary member and the anvil. i

28. The combination with an anvil for supporting a margin of a cover which projects beyond an edge of a heel to which the cover has been applied, of a rotary member provided with a plurality of scraping edges lying substantially in a cylindrical surface and skewed with respect to the plane of rotation of the member, said memher also comprising a series of edges which lie in a conical surface and are continuations of the scraping edges of the cutter, said last-named series of edges being constructed and arranged to bend the margin toward the anvil preparatory to moving the margin between said member and the anvil for skiving the margin by a series of cuts which progress toward the edge of said margin, and gages for guiding the heel past the member.

29. A trimming machine having, in combination, an anvil provided with a convex face terminating in a sharply curved edge, a trimming cutter disposed substantially in tangential relation with respect to the anvil, and a gage spaced from the sharply curved edge and positioned beterminating in an edge which is U-shaped as viewed in two directions disposed at substantial angles toeach other and which is constructed and arranged for cooperation with said gage to guide the projecting margin between the anvil and the cutter thereby to skive the margin to a feather edge. V

31. A trimming machine having, in combination, an anvil for supporting a margin of a cover which has been applied to the rear and side faces of a heel and projects beyond the breast of the heel, a scraping cutter, said anvil terminating in an edge which is U-shaped in two directions disposed at substantial angles to each other, and agage having a substantially flat surface for engaging the covered side of the heel adjacent to one of the breast edges, said gagebeing positioned between said edge and the cutter and forming therewith an opening for receiving said margin, the edge of the gage being constructed to guide the margin past the cutter to cause the latter to skive the margin braced by said anvil to a feather edge.

32. A trimming machine having, in combination,'a rotarytool having a plurality of elongated stock-removing edges, and an anvil arranged substantially in tangential relation with respect to the path of movement of said edges, said anvil and said tool being constructed and arranged to form an opening having a pair of V-shaped portions which are disposed at substantially right anglesto each other and converge toward the portion of ta'ngency of the tool and the anvil.

33. A trimming machine having, in combination, an anvil for supporting a margin of acover which projects beyond an edge of a heel to a face of which the cover has'been applied, a'scraping cutter, said anvil being provided with a heelgaging edge which is outcurved as viewed in two directions disposed at substantially right angles to each other, and a work' gage spaced from said edge and positioned between said edge and the cover thereby to cooperate with the edge for guiding the work past the cutter.

34. A trimming machine having, in combination, an anvil and a rotary cutter arranged to form a V-'shaped opening, and a gage spaced circumferentially of the cutter with respect to the anvil, the edge of the anvil adjacent to said gage being outcurved as viewed intwo directions disposed at substantially right angles to each other.

35 A trimming machine having, in combination, an anvil for supporting a flexible heel cover margin which projects beyond one of the edges of a face of a heel to which the coverhas been applied, a rotary tool having a plurality of stockremoving projections constructed and arranged for cooperation with the anvil to skive said margin by a series of successive cuts progressing toward the edgeof said margin, and means for positioning the heel relatively to the tool todetermine the location at whichstock is removed from said margin, of the cover.

36. A trimming machine'having, in combination a rotary tool, an anvil having a work-supporting face arranged in tangential relation with 7 for supporting a projecting margin of a cover which is secured to a heel, a tool provided with a plurality of projections each of which is constructed and arranged to skive a portion of the projecting margin supported upon the anvil by a cut progressing toward the edge of the margin and to cut surplus material from said margin, and means for operating the tool. 7

38. A trimming machine comprising a station ary anvil for supporting a projecting margin of a cover which is secured to a heel, a rotary scraping tool provided with a plurality of edges each of which is constructed and arranged to skive the projecting margin supported by the anvil by a cut progressing toward the edge of the margin and to cut surplus material from said margin, and means for operating the tool.

39. A trimming machine having, in combination, a rotary tool having a plurality of scraping teeth, an anvil provided with a face forming with the anvil to skive said margin by a plurality of cuts which progress toward the edge of the margin, gages spaced to form an opening for receiving the margin-of the cover and arranged to engage simultaneously the heel adjacent to said one edge thereby to guide the heel as the same is moved past the cutter for determining the location of the trimming cuts, means-for adjusting one of the gages toward and away from the cutter, and means for adjusting said one-- gage circumferentially of the cutter.

41. A trimming machine having, in combination, an anvil for supporting a flexible heel cover margin which projects beyond one of the edges of a face of a heel to which the heel cover has been applied, a gage for engaging the covered face of the heel, a gage for engaging the face beyondv which the cover projects, a rotary cutter provided with a plurality of circumferentially spaced teeth having faces respectively each of which terminates in a sharp edge, eachof said edges being constructed and arranged to skive a portion of the projecting margin supported upon the anvil by a cut progressing toward the edge of the margin and to cut surplus material from the margin, and means foroperating the cutter. V

42. A trimming machine having, in combination, a rotary tool provided with a plurality of scraping edges. each of which comprises a porwith the respective scraping edges and are curved toward the axis of rotation of the tool, and an anvil having a surface which is substantially l tangent to the path of movement of said scraping edges and forms therewith a tapering opening, said anvil being provided with a portion which forms with said second-named edges a throat for facilitating the feeding of a marginal portion of a piece of covering material into said tapering opening thereby to skive said marginal portion by a series of scraping cuts progressing toward the edge of said margin.

43. A trimming machine having, in combination, an anvil for supporting a flexible heel cover margin which projects beyond one of the edges of a heel to which the heel cover has been applied, a rotary cutter comprising a plurality of sharp edges constructed and arranged for cooperating with the anvil to skive said margin by a plurality of cuts which progress toward the edge of the margin, and gages spaced radially and circumferentially of the cutter to form an opening for receiving the margin of the cover and arranged simultaneously to engage the heel adjacent to said edge thereby to position the heel as the same is moved past the cutter for determining the location of the trimming cuts.

LEWIS J. BAZZONI.

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