US2089246A - Skiving machine - Google Patents

Description

1937. c. T. BATCHELDER 2,089,246

SKIVING MACHINE Filed Oct. 28, 1936 2 Sheets-Sheet l 1937. c 'r. BATCHELDER 2; 089,246

SKIVING MACHINE Filed Oct. 2a, 1936 2 Sheets-Sheet 2 Ti g2.

Patented Aug. 10, 1937 SKIVING MACHINE Clifton '1'. Batchelder, Haverhill, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation ofNew Jersey Application October 28, 1936, Serial No. 108,048

7 Claims.

This invention relates to skiving machines and is herein illustrated'as embodied in a machine for cutting on an angle a strip from a piece of flexible sheet materialyfor example for cutting oil the toe' end of 1a vampon a'bevel. I In the manufacture of boots and shoes in which square-ended vampswith'tipsstitched to them are-used, it is customary in some factories to vdie out the vamp from p'atterns which arecorrect for the'shortest tips to be used. The square end of the vamp is skived in any-event so as to prevent the formation of an objectionable. ridge, in the finished shoe along the locality of its attachment to the tip; and in the case of a long tip, where the extent of the overlap wouldbe objectionable, it is customary to cut off on an angle a strip from the squareend so as to produce a shorter vamp having a skived toe end. Machines for performing this cutting-off operation commonly comprise among other elements a knife, a feed roll, a member for supporting the strip which is to be cut off, an edge gage and a presser foot for holding the material against the feed roll.

tion, a controller is'provided for the strip which isbelng cut off, said controller extending over the strip-supporting member, being carrieduby the presser foot and preferably being slidably received in a recess or'socket "in the edge gage to permit adjustment of said gage. With such a construc- 1 tion, the strip is'properly guided, and the rear 'walls of both the presser foot and the gage may be maintained in a common plane passed vertically and longitudinally through the feed roll. Thisand other features of the invention, including certain details of construction and combinations of partsywill be described asembodied in an illustrated'machine and pointed out in the appended claims. Referring to the accompanying drawings, Fig. 1 is a front elevation of a portion of a 1 machine in which the present invention is embodiedf Fig. 2 is an end elevation 'machinef H Fig. 3 is'a section ontheline' III-III of Fig. 1; Fig. 4 is a view partly'insection and partly in elevation showing apiece of work inprocess of being operated upon; q

Fig. 5 is a perspective of thepresser foot and the edge gage in extended relation;

of a portion of the and According to one feature of the present inven- Fig; 6 is an end elevation of thepresser foot;

The illustrated machine is designed to be capable of use, as may be desired, both for cutting off the end of a vamp or other piece of sheet material on a bevel and for beveling or skiving the margin of a piece of sheet material. The machine, like the machine of United States Letters Patent No. 1,342,430, granted June 8, 1920, upon an application filed in the name of Newell V. Dyer, comprises a feed roll I I, a spring-pressed rotary feed disk l3, a rotary disk knife IS, a presser foot I'I, an edge gage l9 and a supporting member or table 2|. The construction and mounting of the feed disk, feed roll, knife and presser foot are substantially like the construction and mounting of the corresponding members 1;

of the machine of United States Letters Patent No. 1,866,918, granted July 12, 1932, upon an application filed in the name of Milton H. Ballard.

The feed roll shaft (not shown) is rotatably mounted in a bearing member 23 which is adjustable horizontally in a carrier 25, said carrier being adjustable in a curved guideway ina stationary member 21 by actuating a link 29 by means of a treadle (not shown). The bearing member 23 carries a casting 3| by which the feeddisk shaft is carried; and to this casting is adjustably fastened a bracket 33 by which the presser foot I! and. edge gage l9 are indirectly carried. Consequently, when the feed roll II is .adjusted angularly to vary the angle of the scarf produced, the feed disk, the presser foot and the edge gageare adjusted with it. The feed disk, knife and feed roll are rotated continually as in the machine of the Ballard patent. As thus far described, except for the table 2|, the machine may be like that of the Ballard patent to which reference is made for details not herein shown and described. It will be understood that the work is fedaway from the observer, as viewed in Fig. 1, by the action of the feed disk l3 and the feed roll H with the part of the work being operated'upon passing beneath the presser foot I1 and with the edge of the work bearing against the edge gage l9.

The table or supporting member 2|, is provided for supporting the strip which is cut off. This table is adjustably mounted at the upper end of an angle iron'35 by means of a cap screw 31 which passes through a slot 39 in the angle iron and is threaded into the downwardly extending stem of the table 2]. The lower horizontal arm :of theangle iron 35 is adjustably fastened by a screw M which passes through a slot 42 in the 1 arm and is threaded into one member 43 of'a clamp, the other member being indicated at 45.

A long screw 41 which passes loosely through a bore in the member 43 and is threaded in the member 45, clamps the two members in adjusted position upon a dovetailed guide 48 formed on the lower portion of the bearing member 23 in which the feed roll shaft is mounted. It is thus possible to adjust the support or table 2| in three directions. The supporting surfaceof the table 2| (Fig. 2) is cylindrical; and its curvature corresponds to that of the surface of the feed roll. The table, however, (Fig. 4), is adjusted into a position in which its periphery extends slightly beyond that of the feed roll so that, when a piece of work I09 is being operated upon, there is a slight upward bend in the work at the point 299 to ensure that the knife shall make a clean cut. The rear edge 49 of the table 2| lies. in a vertical longitudinal plane passed through the axis of the feed roll; and the forward point on the edge of the rotary knife lies close to this plane. the piece of work will be severed on a bevel, as shown in Fig. 4, the edge of. the bevel lying close to and practically coinciding with the upper right-hand corner of the feed roll; and the angle of the bevel may be varied by adjusting the feed roll angularly about a horizontal axis passing through this corner, said adjustment adjusting at the same time all of the work-engaging parts of the machine, except the knife which remains always in the angular position shown but may be adjusted vertically.

It has been explained that the rear edge 49 of the supporting table lies in a vertical longitudinal plane passed through the axis of the feed roll 7 (that is, in register with the uppermost element of the feed roll). In order to control the work properly, particularly in skiving curved edges, the rear wall 6| of the presser foot (Fig.

- 6), as well as the rear wall 63 of the edge gage (Fig. 7), also lies in this same plane, and the lower corner as of the presser foot and the lower corner y ofthe edge gage are in line. In order to control and properly guide the severed strip 390 (Fig. 4) while maintaining the structure just above described, a strip controller is' provided which telescopes with'the edge gage in a'direction transverse to the direction of. feed of the work so that the edge gage may be adjusted toprovide for cutting off strips of diiferent widths.

To this end the presser foot N (Fig. 5) carries a strip-controller 5| having a substantially quarter-round cross-section (Figs. 3, 5) which is adapted to be received slidably in a correspondingly shaped socket or recess 53 in the stem 55 of the edge gage I9, the cross-section of the recess 53 (Fig. 3) being somewhat larger than the cross-section of the controller 5| to permit the controller to rise and fall with the presser foot. The controller 5| (Fig/'5) has'a stem 51 which is received in a rabbet in the 'rear of the upper portion of the presser foot and is fastened to the presser foot-by screws one of which is'shown at 59 in Fig. 6. When the presser foot and edge gage areassembled in the machine, their rear walls 6|, 63, as has been stated, are in line and are located in a' vertical longitudinal plane passed through the axis of'the'feed 'roll.

Referring now more-particularly to Figs. land 3, the mounting of the presser foot and edge gage will be described. The presser foot and its mounting are substantially the same as in the patented machine." The stem 650i the presser .foot isslidable in a'vertical bore in the outer end of a bracket H which is mounted for hori- With the parts in the positions shown,

zontal adjustment on the bracket 33 by means of a cap screw 13 which passes through a slot I5 in the bracket 33 and is threaded into the bracket A bell-crank lever 11 pivoted at 19 to the bracket H has a substantially horizontal arm, which extends into a vertical slot 8| (Figs. 2 and 5) in the stem of. the presser foot, and an upwardly extending arm having a -bore into which an adjusting screw 83 is threaded; A compression spring 85 has its right-hand end (Fig. 1) located in a socket in the bracket H and receives in its left-hand end a reduced end of the screw 83. This spring normally holds the presser foot down as far as is permitted by a nut 81 which 1 is threaded upon the reduced upper end of the stem 65 of the presser foot.

The lower face of the bracket H has a tongue 89 (Fig. 3) which is received in a groove formed in .the upper face of a block 9|, said block being fastened to the bracket H by screws, one of which is shown at 93, and having a downwardly projecting portion through which extends a guide way 95 rectangular in cross-sectionin which is slidably received the stem 55 of the edge gage l9, said stem being held in adjusted position by a thumb screw 91. The edge gage l9 may thus be adjusted horizontally, the controller 5| extending more or less into the recess 53 in the edge gage as said edge gage is adjusted.

The machine has been described above with reference to cutting off Vamps or other pieces of work on a bevel. It may be used also for regular skiving, that is for beveling the margin of a shoe part or other piece of sheet material.

In such case, the edge gage I9 is adjusted up i to the right-hand edge of the feed roll as viewed in Fig. 1, or partly across the periphery of the feed roll. In the latter case, if desired, the supporting table 2| which normally projects from .005to .007 of an inch beyond the periphery of the feed roll may be lowered; and the bracket 33 may also be lowered to cause the curved face of the edge gage to lie close to the periphery of the feed roll.

For regular skiving, it is desirable to'provide an auxiliary edge gage'in order to furnish means for readily producing. a different sort of scarf. To this end an auxiliary edge gage 99 is provided (Fig. 1)the5right-hand'end of its stem extending between the arms of a fork at the righthand 'end of a bracket I03 and'being pivoted about a small screw |05=which passes loosely through one arm of the fork and through the stem and is threaded into the-other arm of the fork. The bracket I03 is adjustably fastened to the block 9| by screws I04 which pass through slots in thebracket and are threaded into the block 9|. A compression spring I0] urges the auxiliary edge gage at all times to swing down into operative position. As shown in Fig. 1, the

auxiliary edge gage is being held up in inoperative position by a cam I09 pivoted to the block 9| by a screw Between the head of the screw and the cam is a coiled spring 3 (Fig.3). By

swinging the cam down the auxiliary edge gagemay be permitted to swing down into operative position. When theauxiliary edge gage is down in operative position, it is possible to push the edge of thework'beneath itand use the regular edge gage l9 or to use the auxiliary edge gage as" may be desiredp Having thus'described my invention, what I claim as new anddesire to secure by Letters Patent of the United States is:

1. A machine for'cuttingon an angle a; strip"- from a piece of flexible material having, in combination, a rotary feed roll, a member for supporting the strip which is to be cut oil, a presser foot for holding the body portion of the material against the feed roll, a knife, a controller for the strip carried by the presser foot and extending over the supporting member, and an edge gage adjustable toward and from the presser foot, said edge gage having a recess into which the controller extends more or less in accordance with the adjusted position of the edge gage.

2. A machine for cutting on an angle a strip from a piece of flexible material having, in combination, a rotary feed roll, a member for supporting the strip which is to be out off, a presser foot for holding the body portion of the material against the feed roll, the rear wall of said presser foot being located substantially in a vertical longitudinal plane passed through the axis of the feed roll, a controller for the strip carried by the presser foot and having its rear wall in front of said plane, a rotary disk knife the forward point of which lies close to said plane, and an adjustable edge gage having its rear wall lying in said plane and having in it a recess or socket into which the controller extends.

3. A machine for cutting on an angle a strip from a piece of flexible material having, in combination, a feed roll, a bearing in which the feed roll shaft is rotatable, a knife, a presser foot for holding the body portion of the work against the feed roll, an edge gage, a member for supporting the strip which is to be cut off, a controller extending over the strip-supporting member, and means for mounting said member on the feed roll bearing for adjustment longitudinally of the feed roll axis, toward and from the controller and for- V ward and back in the direction of feed movement of the work.

4. A machine for cutting on an angle a strip from a piece of flexible material having, in combination, a feed roll, an angularly adjustable bearing in which the feed r011 shaft is rotatable, a knife, a presser foot for holding the body portion of the work against the feed roll, an edge gage, a member for supporting the strip which is to be cut off, a controller extending over the stripsupporting member, and means for mounting said member on the feed roll bearing for adjustment longitudinally of the feed roll axis, toward and from the: controller and forward and back in the direction of feed movement of the work.

5. A machine for cutting on an angle a strip from a piece of flexible material having, in combination, a rotary feed roll, a member for supporting the strip to be cut off, said member having a supporting face curved to correspond to the curvature of the feed roll and projecting beyond the periphery of the roll so as to impart a bend to the material, a presser foot for holding the body portion of the material against the feed roll, a controller for the strip carried by the presser foo-t, and a knife arranged to sever the material at the bend.

6. A machine for cutting on an angle a strip from a piece of flexible material having, in combination, a rotary feed roll, a member for supporting the strip which is to be cut off, a knife inclined to the axis of the feed. roll, a presser foot for holding the body portion of the material against the feed roll, and a controller for the strip having an operative face located above the level of that of the presser foot, said controller extending over the strip-supporting member and being carried by the presser foot.

I. A machine for cutting on an angle a strip from a piece of flexible material having, in combination, a rotary feed roll, a stationary member for supporting the strip which is to be cut off, said member having a supporting face curved to correspond to the curvature of the feed roll, a knife inclined to the axis of the feed roll, a presser foot for holding the body portion of the material against the feed roll, and a controller for the strip having an operative face located above the level of that of the presser foot, said controller extending over the strip-supporting member and being carried by the presser foot.

CLIFTON T. BATCHELDER.

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