US1350305A - Trimming-machine - Google Patents

Description

J; FAUSS'EL TRIMMING MACHINE.

APPLICATION FILED NOV. 30. 1,917

1 ,350, 305, Patented Aug. 24, 1920.

2 SHEETS-SHEET l.

J. FAU S SE.

TRIMMING MACHINE.

APPLICATION FILED NOV. 30 19H- Patented Aug. 24, 1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT oFFlcE.

JOS PH rA ssE, or eRocKroN, Mns sAc s T'rs, assrenoa To UNITED siioE MACHINERY CORPORATION, or rArEEsoN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TRIMMiNG-MACHinE. r

Speeification of Letters Patent. Patented Aug, 24, 1920.

Application filed November 30, 1917. Serial No. 204,640.

This invention relates to machines for op erating on shoes and, in particular, to machines for trimming the edges of shoes. It is herein shown as embodied in a machine for trimming the edge of an insole after the insole is attached to a last, of'the' type shown in the patents to Keyes No. 1,076,431, Oct. 21, 1913 and No. 1,130,742, March 9,1915,

The insole channeling operation frequently causes an appreciable elongation of the insole. The inferior material of which it is often made and the fact that it is channeled while in temper contribute to the pro duction of this effect, as a consequence of which the insole fails to fit the last when applied to it. It has become the practice, therefore, to apply the insole to the last in such manner as to register with it at the toe tip, and to trim off the surplus at the end of the heel.

A difliculty also arises due to the faulty shaping or to the changing in shape of the insole after its initial shaping, it being found that it is frequently too fat or wide in the shank and heel breast portions. This makes it desirable to trim all around the heel, instead of merely at the end thereof. I

In machines used for this purpose prior to the present invention, the last with the insole tacked on it was supported on a jack and presented to a revolving cutter, the last resting against a gage as it was turned around on its thimble axis to present the heel-periphery of the insole to the cutter. lVhen trimming insoles which were fat" in the shank, it was found that the cutter left an abrupt concavity with a sharp terminal corner where it stopped trimming the shank near its rear end. This terminal corner between the concavity and the shank edge had to betrimmed by hand to avoid causing a hump in the upper of the com pleted shoe near the heel'breast.

An object of the present invention is the correction of the difiiculty described.

An important feature of the invention is a fulcrum about which the work may turn to draw the operating means gradually out of the work at the end of the operation to avoid leaving a lack'of smoothness in the work at the end of the treated portion.

Another feature of the invention is a gage for positioning the lateral surface of the last constructed and arranged to engage the heel breast portion of the last as the cutter engages the corresponding portion of the insole and to act as a fulcrum on whichthe last may swing to separate the insole and cutter. In the embodiment shown, the gage is elongated along the cutter periphery, serving to position the last during the entire trimming operation, and its end serves as the fulcrum. I

This position of the fulcrum point enables the portion of the insole in contact with the cutter in advance of the finishing point 'of cut to move toward the cutter as the work as a whole swings awayfrom it, thus cutting off the troublesome corner above mentioned. Preferably the fulcrum point will be placed very near the finishing point of cut so that'the trimmed portion of the insole and the portion in contact with the cutter will swing in opposite directions around it, and an important feature of the invention resides in a fulcrum the swinging of the work as a whole around which will move a part of the work toward the operating means before it moves it away,thus cutting off the troublesome corner alluded to above. In the preferred embodiment of the machine the rotation of the last is a compound one, com-- prising the movement already discussed, and also a rotation about a supporting pin'which is constrained to move in an arc of long radius. This movement tends to draw the corner tangentially across the cutter, and assists in the production of thedesired effect, affording some latitude in the location of the fulcrum point.

These and other features of the invention comprising certain arrangements 0 and combinations of parts will be understood from the following description of a preferred embodiment of the invention, selected for purposes of illustration and shown in the accompanymg drawings in which,

' usual shield S.

Figure 1 is an end view in elevation of an insole heel seat trimming machine, in which the present invention is embodied;

Fig. 2 is a plan view of the cutter and adjacent portions of the illustrated machine showing the manner in which the work is presented for treatment. 1

Fig. 3 illustrates diagrammatically the advantages secured by my invention, and

Fig. 4 is a full size detail illustrating the action of my novel gage.

The machine illustrated comprises a frame 2 having bearings for a rotary shaft 4 which carries a toothed cutter 6 and the Positioned at the end of the cutter is a guide member 10 constructed for engagement with the lateral surface of a last (Fig. 2) adjacentto the edge of the heel seat to guide the last in its turning movement during the operation of trimming around the edge of the heel portion of the insole 11. This guide member has a lip 12 projecting between the bottom of the last and the insole for the purpose of positioning the last axially of the cutter and supporting the insole out of contact with the last adjacent to the point of operation of the cutter, as well as preventing any possible engagement of the cutter with the last, all as more fully explained in the patents above mentioned. The guide member 10 is mounted 'adjustably in a support 14 which is pivoted to the frame 2 at 16 to permit the member to be swung away from the cutter when it is desired to remove the cutter from its shaft.

Secured upon one side of the lower portion of the frame 2 is a bracket 30 upon which the work support of the machine is mounted. This bracket is provided with a bearing 32 for the reception of a stem 34 which projects from a block not shown bearing against the right end of the bearing 32 as seen in Fig. 1. Projecting from the block at right angles to the stem 34 is a stem 40 which provides a bearing for the upwardly extending arm 42 of the work support. Mounted upon the upper end of the arm 42 is a head 44 having a stem 46 which engages in a bore in an offset portion of the army so that the head may turn in a plane transverse to the arm.

Secured in a bore in the head 44 is a spindle 56 the forward end portion of which is arranged to enter the last pin socket of a last, and a clamp member 82, operated by a lever 104 on the head 44 holds theheel portion of the insole in position on the last. Fora fuller description of the work holding mechanism reference may be made to the patent to Brown and Macleod No. 1,295,964 granted March 4, 1919, which shows and fully describes the work holding mechanism used. in the commercial machine embodying my invention.

hen it is desired to trim an insole attached to a last the operator mounts the last on the spindle 56, clamps the heel portion of the insole to it by the member 82, and presents preferably its end portion to the cutter. The lip 12 is placed between the last and the insole 11 and the lateral edge of the last is rested against the side of the plate or gage 10, as shown in Fig. 2. The operator then turns the last up and down so as to run the cutter around the heel portion of the insole. lVhen the insole is too fat in the shank, the stopping of the operation at the heel breast portion, by which term I'mean generally the locality near the heel breast, both in front of and behind it, leaves a concave gouge 108 with a projecting cor ner Z) in the edge between the trimmed and untrimmed portions of the edge (Fig. 3 on the right) and it is to the correction of this diflicnlty that my invention is directed.

The gage 10, as shown by Figure 4, has an elongated working surface including a comparatively straight part 110 for engaging the back of the heel of the last, and convex shoulders 112 and 114 for engaging the sides of the heel. The edges 116 and 118 diverge or recede to provide clearance for the ball portion of the last during the latter stages of the insole trimming operation. Although the remote portions of the shoulders are nearer the axis of the cutter than the part 110 is, this relation does not result in deeper trimming at the sidesthan at the back of the heel, because the heels of lasts are undercut at the front of the sides more than at the back, and the gage traverses the wide or bulging portions of the last. The gage, therefore, enables the cutter to follow the edge of the'heelseat of the last until it reaches nearly'the front of the heelseat, whereupon the last rocks on the shoulders one at a time while advancing longitudinally and thereby retracts the insole gradually from the cutter. ders 112 and 114 are located opposite the points at which the cutter contacts with the heel breast portion of the insole. lVhen the last is in the Fig. 2 position it contacts with the gage at the point midway between 112 and 114. As the toe of the last is turned downward the point of contact moves toward the heel breast part of the last and ultimately toward the shoulder 112 on the gage, reaching that shoulder at the time the cutter reaches the heel breast portion of the insole. Further movement of the last rocks it on the shoulder 112 as on a fulcrum The shouland also draws it lon itudinall 7 alon the cutter periphery owing to the fact that the last is pivoted at the end of the swinging arm 42,'which is now swinging away rom swun exclusivel I about 112 as center and b I 7 superfluous material due to the fatness of" the insole is shown at a b 0. The dash lines show a later position of the same parts, the

superfluous area being now reduced to a b" 0. The dotted lines show the conclusion of the operation, the superfluous material being reduced to a" b c, an amount which causes no trouble; see Fig. 3 on the left. The other side of the insole is trimmed in exactlythe same way, by trimming the toe upward about the point 114-. The portion Z) c is the portion in contact with the cutter, and the point 0 may be called the point of finishingcut. The. remainder of the portion 6 a may be called the portion of roughing out.

In Fig. no attempt has been made to show, in accordance with actual relations, that the insole lies back of the lip 12. 'The figure is to be regarded as a diagram.

The situation of the point 112 is of great importance. If the last were merely'swung about the pivot 40 of the arm 42 to pull the work away from the cutter, an abrupt concavity as at 108 would be the result. The same would be true if the last were rotated about a point remote from the point of cut, as at 126. But by rocking the last about a point close to the point of cut, and preferably on the same side of the portion of roughing cut as the point of finishing cut, the corner I) is initially moved into the cutter at the same time that the heel of the insole swings away from it (Fig. 4:). If the point r: and thepomt 112 are on the same side of the point 7), the point I) will rotate directly into the cutter as the end of the heel turns away from it. The corner I) is therefore trimmed off beforethe insole has been swung entirely free of the cutter, leaving the insole in the condition shown on the left in Fig. 3. This effect is also due in part to the fact that the spindle 56 moves in an are 120 of long radius, and consequently draws the insole tangentially along the cutter periphery as it swings out. It is therefore not necessary that the point 1.12 and the point 0 be on the same side of b, or that the point '112 be between the points Z) and 0, since the tangential drag of the in sole while swinging about any point, near to the projection at 7) will cut off the projection, if the point 112 is sufliciently near 6.

It will be seen by reason of the arrangement of the rods or spindles 3% and a0 the work support is afforded. a substantially universal swinging movement to facilitate the presentation of the work to the machine.

Having thus described my invention, what I claim'as new and desire to secure by Letters Patent of the United States is 1. In a machine for trimming an insole attached to a last, a cutter, and a fulcrum arranged adjacent to the working point of the cutter to contact with the side of the heel of the last to limit the penetration of the cutter, at the side of the'heel seat portion of the insole, the fulcrum being effective to shift the point of cut gradually toward the edge of the work during the latter stages of the operation, whereby a smooth edge is produced. I

2. In a machinefor trimming an insole attached to a last, a cutter, and a fulcrum having a curved last-engaging surface arranged to contact with the side of the heel of the last adjacent to the point of operation of the cutter to limit the penetration of the cutter, said surface being curved more than the periphery of the cutter and being effective to shift the point of cut gradually toward the edge of the work in consequence of rocking the heel of the last thereon during the latter stages of the op eration, whereby a smooth edge is procluced.

In a machine for trimming an insole attached to a last, a cutter, and a gage in- Y which to position successively the back and.

sides of the last as the latter is moved to present different portions of the insole to the cutter, said gage having an elongated working surface terminating in a relatively abrupt convex shoulder arranged to bear .on the side of the heel of the last to separate the cutter and the insole.

5. In a machine for trimming an insole attached to a last, a cutter, and a gage upon which to position the lateral surface of the last as the latter is moved to present different portions of the insole to the action of.

the cutter, the end of the gage being arranged to contact with the last surface simultaneously with the engagement of the cutter-with the heel breast portion of the insole, and to permit the rotation of the last upon it to throw the heel breast portion of the insole away from the cutter.

6. In a machine for trimming an insole at tached to a last, a cutter, and a gage con structed and arranged to engage the last edge to limit the penetration of the cutter, the end of the gage being arranged to contact with the last at the heel breast portion as the cutter approaches this portion of the insole, and to serve as a fulcrum about which the last may be rotated to lead the point of cut out to the edge of the insole.

7. In a machine for trimming an insole attached to a last, a cutter, and a gage comprising a plate arranged to separate the insole from the last bottom and to support it at the point of cut, and a boss on the plate arranged to contact with the lateral surface of the last to limit the depth of cut, said boss extending along a course adjacent to the effective are of the cutter and terminating at a pointopposite the rear end of the shank of the last when the cutter is trimming up to the heel breast portion of the insole so that the last may rest on and slide over intermediate points of the boss as the cutter works from the back of the insole toward the heel breast portion, and may then swing on the end of the boss as a fulcrum to lead the cutter out of the insole.

8. In a machine for trimming an insole attached to a last, a gage arranged for rolling and sliding contact with the last at a point substantially opposite the point of operation on the insole as it moves around the sharply curved portion of the heel periphery and shaped to carry its point of contact with the last to the end of the gage, as the point of contact moves along the fiat part of the heel periphery, so that the last may then pivot on the end of the gage.

9. In a machine for trimming an insole attached to a last, a cutter, and a gage for engaging the last edge to limit the penetration of the cutter constructed and arranged so that the point of contact of last and gage moves to the end of the gage as .the last is rotated to carry the cutter around the insole, reaching the end of the gage simultaneously with the arrival of the cutter at the heel breast portion of the insole, and providing clearance beyond its end for the last to rotate to draw the insole away from the cutter.

10. In a machine for trimming an insole attached to a last, a cutter, and a gage .arranged for pivotal movement of the last about it while the cutter is trimming the heel breast portion of the insole, the and the point of finishing out being located on the same side of the portion of the insole which is in contact with the cutter.

11. In a machine for trimming an insole attached to a last, a cutter, and a gage for engaging the last edge to limit the penetration of the cutter as the last is moved to carry the cutter around the insole, constructed and arranged to carry its point of contact with the last continuously along the last until the cutter reaches the heel breast portion of the insole and then to keep its point of contact with the last in the neighborhood of its heel breast portion while the last is rotated about it to carry the insole away from the cutter.

12. In a machine for trimming an insole attached to a last, a cutter, and a gage for engaging the last-edge to limit the penetration of the cutter as the last is moved to carry the cutter around the insole, said gage having two shoulders constructed and arranged to engage respectively the right and left sides of the heel of the last when the cutter is in contact with the corresponding tour flatter than that of the cutter and having its end opposite the position assumed by the heel breast portion of the insole when the cutter is engaging that portion.

14:. In a machine for trimming an insole attached toa last, a cutter, and a gage for engaging the last edge to limit the penetration of the cutter as the last is moved to carry the cutter around the insole, having a peripheral contour flatter than that of the cutter and having its end opposite and inside the position assumed. by the heel breast portion of the insole when the cutter is engaging that portion.

15. In a machine for trimming an insole attached to a last, a cutter, a support carrying the last at its upper end arranged to swing about a point whose distance from the cutter is great as compared with the movement of its upper end, and a gage for en- 1 gaging the last edge to limit the penetration of the cutter and having its end opposite the point of contact of the cutter and the heel breast portion of the insole, so that swinging the last around the end of the gage will initially throw the extreme point of the insole engaged by the cutter toward the cutter and draw it along the cutter.

16. In a machine for trimming an insole attached to a last, a cutter, and a gage for engaging the last edge to limit the penetration of the cutter and having a portion opposite the point of contact of the cutter and the heel breast portion of the insole, con structed and arranged to permit swinging the last around this portion of the gage in such manner that such swinging movement willinitially throw the extreme point of the insole engaged by the cutter toward the cutter.

17. In a machine for trimming an insole attached to a last, a cutter, and a gage having separated convexshoulders arranged to traverse the sides of the heel of the last,

respectively and in turn, to limit the penetration of the cutter near the front of the heelseat portion of the insole, and having a relatively straight last engaging portion connecting said shoulders to traverse the back part of the heel.

18. In a machine for trimming an insole attached to a last, a cutter, last-sustaining means having a definite path of movement toward and from the cutter, the last being capable of pivotal motion relatively to said means, and a gage arranged to co-act with the side of the heel of the last to guide the Work relatively to the cutter While the latter is operating on the corresponding portion of the insole, said gage and said means, conjointly, being arranged to determine a compound motion of the last to retract the side of the heelseat portion of the insole gradually from the cutter.

19. In a machine for trimming an insole attached to a last, a cutter, and a gage having an elongated surface arranged to traverse the back and sides of the heel of the last to guide the insole relatively to the cutter,

saidsurface including separate curved Working portions and a relatively straight WOIk ing portion connecting them.

20. Ina machine for trimming an insole attached to a last, a cutter, and a gage having an elongated surface arranged to traverse the back and sides of the last to guide the insole relatively to the cutter, said surface including separate curved Working portions of greater curvature than the effective are of the cutter, and a'relatively straight portion connecting said curved portions.

21. In a machine for trimming an insole attached to a last, a cutter, and a gage to limit the penetration of the cutter into the insole, said gage including separated convex portions arranged to traverse the sides of the heel of the last While the cutter is acting on the sides of the heelseat portion of the insole, said convex portions being effective to separate the insole gradually from the cutter.

In testimony whereof I have signed my 7

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