US1474398A - Shoe-trimming machine - Google Patents

Description

Nov. 20, 1923 A. BATES SHQE TRIMMING MACHINE Filed Feb. 26. 1919 Patented Nov. 20, 1923.., I

UNITED? STATES,

74,398 PATENT OFFICE.

ABTEUR BATEB, OF LEICESTEB, ENGLAND, ASSIGNOE TO UNITED SEOE MACHINERY COBPOBATION, OF PATEBSON, NEW JEBSEY, A COBPORATION OF NEW J'EBSEY.

SHOE-TBIMHING MACHINE.

Application filed February 26, 1919. Serial Io. 279388.

To all "whom it may concem:

Be it known that I ARTHUR BATES, a subject of the King-of rreat Britain, residing at Leicester, in the county of Leicester, England, have invented certain new'and useful Improvements in dhoe-Trimming Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention,.such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to shoe trimming machines and more particularly to machines for shaping to proper size and contour such projecting portions of the shoe bottom as help to form the extension in the completed shoe. The illustrative embodiment of the invention shows a Construction by which the contour of the part of the flange which is trimmed is determined by the contour of an outsole that has been trimmed or otherwise shaped as to Outline prior to its attachment to the Shoe.

One method of making welt shoes is disclosed in Letters Patent of the United States t William H. Hooper Nos. 861,178 and 861,180, dated July 23, 1907. By practicing this method the usual rough-rounding operation on the outsole is eliminated because an outsole of final `outline is attached instead of a block outsole. The welt then projects laterally beyond the periphery of the outsole the projecting portion thereof constituting one example of what is hereinafter termed a marginal extension, and it becomes necessary to trim such extension to the size and contour of the previously shaped outsole before the edge of the sole and welt can properly be finished.

One object of the present invention is to provide speedy and accurate means for performing a trimming operation on the outturned flanges of Shoe bottoms, to Supplement such Operations as those included in' wll readily be understood by those 'skilled n the art, the invention comprises the features and combinations of parts hereinafter descrbed and particularly pointed out in the appended claims. The preferred form of the invention is llustrated in the accompanying drawings in which:

Fgure 1 is a side elevation of the machine with the frame partlv removedto disclose the parts inside it. In this view the knife 'and gege are both in their raised positions section; and

Fig. 3 is a detail, in elevation, of a ortion of a welt shoe assembled by the ooper method with the knife and gage in working position thereon.

In the illustrative embodiment of the invention the machine is shown as a small bench machine. The frame comprises a column 2 provided with a hollow head 4 having an open forward end. v The Operating tools pro ect from this open end and access. to them is gained by lifting a pivoted cover plate 6. The trimming knife 8 is of arcuate form and s clamped 111 a knife holder 10 formed by an arm projecting forwardly from an oscillatory block 12 carried by horizontal trunnions 14 journaled in the sides of the hollow head 4. V

The block 12 is rocked back and forth on its trunnions and consequently the knife 8 is oscillated, it being understood that the center of curvature of the knife is at the axis about Where the block 12 rocks. The mechanism for rocking the-block 12 is similar in principle to that disclosed in prior Letters Patent of the United States No. 1,139,727, dated May 18, 1915, to Wm. T. B. Roberts, to which reference may be had. Since this knife actuating mechanism is not claimed herein it will suflice to say that the block 12 has a hollow center in which is seated the rectangular head 16 of a stub shaft 18. The head is fast on a vertical pin 20 in the block 12 and the stub shaft is seated in a, conical boss 22, in the position indicated by dotted lines in Fig'. 1, on the forward end of the driving shaft 24, driven by a belt running over a pulley 26. The action is the same as described in said prior patent last referred i of U-shaped form having its legs Secured to the frame by screws, as shown in Figs. l

and 2. This bed is preferably tapering in cross-section to enable it to enter the welt crease and support the' portion of the shoe which forms the out-turned flange (see Fig. 3) but the bed 28 is merely a support and cutting block and acts in no way as a gage to determine the path of the cut made by the knife 8. y

The path of the trimming cut to be made is determined by a gage 30. The latter s preferably U-shaped so that its legs 82 may be pivoted on the trunnions 14: inside the hollow head 4 (see Fig. 2). One of the legs is provided with a depending arm 34 to which is attached.one end of a tension spring 36 the other end of which is se` curedto a pin 38 extending loosely through the hollow head 4. A wing nut 40 on the threaded pin permits adjustment of the ten ,sion of the spring which acts normally to hold the gage 30 down in operative position near the cutting bed 28. Tn -order to raise the gage to an inoperative position to permit insertion and removal of the work a hand lever 4:2, pivoted on the hollow head 4, is provided with a cam head 44: adapted to engage the arm 34 and force it to the left, as illustrated in Fig. 1.

The gage member also constitutes a novel form of presser-foot by reason of having a roller 46 arranged to bear on the margin of the previously shaped shoe element by which the line of trimming is determined. Pret erably the depth of the gage below the bottom of the roller would be less than the th'ickness of the stock above that to be trimmed, so that the downward Stress of the gage would be sustained by the roller and the part on which it rolls instead of by the part being trimmed. This condition avoids a drag on the part being trimmed, enables the latter to pass under the gage without likelihood of catching thereon and minimizes the frictional resistance to the feeding of the work. The level of the gage and presser-foot Will therefore be determned not by the part to be trimmed but by the previously shaped part superposed thereon, and since the part to be trimmed will not have any duty to perform it will not militate against uniformly good work by reason of lacking firmness of body or smoothness of surface.

aeraeae tion roll 46 of which rides on the face of the sole, the whole being held yieldingly to the Work by the spring' 36. The shoe is fed by the operative and by maintaining contact with the gage the Welt is rapidly and ac curately trimmed to the contour of the outsole.

l`hose skilled in the art will recognize that trimming Operations other than that illustrated in F ig. 3 can be performed with facility. For example, the machine may be used to trim the middle sole of a McKay shoe to the contour of its shaped outsole as illustrated by dotted lines in Fig. l. In fact the machine is useful wherever it is desirable to trim the margin of any part of a shoe bottom which projects beyond the last, herein termed a marginal extension, to the contour of another part of the shoe.

The nature and scope of the present in- Vention having been indicated and the preferred embodment of the invention having been specifically described, what is claimed as new is 1. A shoe-trimming machine comprising a cutting bed, a knife arranged to cut against said bed to trim surplus material from a marginal extension projecting beyond the edge of a sole lying on said extension, and a gage arranged to engage the edge of such sole to determine a course of trimming.

2. A shoe-trimming machine comprising a cutting bed formed to project into the crease formed by the upper and a marginal extension of a shoe, a knife arranged to cut against said bed to trim surplus material from said marginal extension, and a gage arranged to coact With the edge of a sole lying on said marginal extension to detet'- mine a course of trimming.

3. A shoe-trimming machine comprising a cutting bed formed and arranged to en gage the crease side of a marginal extension projecting from the crease of a shoe, a knife arranged to cut against said bed to trim surplus material from said marginal extension, and a gage arranged to clear said marginal extension and engage the edge of a sole lying thereon and to permit said edge to approach so closely to the knife that said extension will be trimmed substantially to said edge.

4. A shoe-trimming machine comprising a cutter for trimming surplus material from a marginal extension projecting from the crease of a shoe, means for sustaining 1,474,see

tially in tangential relation to the field of trimming so that the marginal extension will be trimmed to the contour of the sole.

5. A Shoe trimm'ing machine having, in comb nation, a Shoe support, a gage sup'- ported by the face of the outsole and having a hearing on its edge, and a cutter for trim ming an out-turned flan e which lies above the outsole arranged a jacent to the sole edge engaging position of said ge. I

6. A shoe-trimming machine aving, in combination, a support for the crease side of the marginal extension of a shoe, a cutter arranged to trim said extension, and a gagearranged to cooperate with the periphery `oi the outsole so that the latter will clear said cutter.

7. A machine of the character described comprising a work-bed for engaging one face of a marginal extension projecting beyond the periphery of the outsole of a shoe, a' knife arranged to cnt against said bed to trim said extension, and a gege arranged to bear on said periphery so as to keep ,the outsole from intersecting the lines of travel of the knife.

8. A shoe-trimming machine comprising cooperative members arranged to clamp superposed layers forming the bottom of a V shoe, means arranged to trim surplus material from the marg'in of one of such layers, and means arranged toengage the periphery of another one of such layers to determine a course of trimming. v

9. A shoe-trimming machine comprising a cutting bed and a cutter arranged to cooperate therewith to trim sui-plus material from the marginal extension of a Shoe bottom, an edge-gage arranged to engage the periphery of the Shoe bottom to determine a course of trimming, and means carried by said edge-gage also to cooperate with said cutting bed to clamp the work.

10. A shoe-trimmin machine comprising a bed for supporting t e marginal extension of a shoe, a cu-tter arranged to trim a layer of one contour according to the previously' defined contour of another layer in confronting relation thereto, and a gage arranged to engage the edge that forms the contour of said other layer so as to determine a course of trimming according to said previously defined contour and so as topreserve the letter.

11. A shoe-trimming machine comprising a cuttin bed, means arranged to cooperate therewit to clamp superposed layers including an outsole Secured te a shoe, a trimming cutter arranged to trim surplus material from one of said layers other than said outsole, and a gage arranged to' engage the edge of the outsole to wntrol such trimming so as to preserve the contour of the outsole.

12. A shoe,-trimming machine wmprising.

awork-support Iormed and' arranged to engage the crease side of a marginal extenson projecting from' the crease of a shoe, a gage outsole.

13. A shoe-trimming machine comprising. cooperative clamping membersarranged to clamp the outsole and another shoe element formng a marginal extension projecting from the body of a shoe, means arranged to operate on said other element, and a age carried by one of said clam ing mem ers and arranged to engage the e e of the outsole to keep the latter out o 'the field of operation of said means.

14. A shoe-trimming machine comprisinga work-support arranged to support a marginal extension projecting from the body of a shoe, spring-stressed clamping means arranged to engage the face of an outsole lying on. said marginal extension so as to exercise' its clamping action against said. work-support, means arranged to trim surplus material from said marginal extension, and means arranged to retract said clampin means for the introduction the work.

15. A shoe-tri'nming machine comprising a work-support arranged to support a marginal extension projecting from the body of` and removal o a shoe, a cutter arranged to trim ,surplus material from said marginal extension, and spring-stressed means arranged to engage the work so as to'funotion as an ed e-gage, a guard for the cutter, and as a c amp to press the work against said work-support.

16. A machine of the character described comprisin means for supporting the art to be trimme a cutter for trimmin sai part, and a combined work-clamp, wor -gage and cutter guard constructed 'and arranged to clamp the work otherwise than by the part to be trimned.

17. A machine of the character described comprising two work-engaging members arranged to receive between them a marginal extension projecting from the periphery of the outsole of a shoe, and a knife arranged to cut against one of said members to trim said extension, one of said members being formed and 'arranged to bear a ainst said bed to trim said extension, a spring- I stressed guard arranged to cover the cutting portion of said knife and to tend toward said 'bed, and an anti-friction roll. carred by said guard and arranged to roll' on said outsole so as to prevent the guard from bearing on said marginal extension.

19. A machine of the character described comprisng a cu-tting bed erranged. to engage the crease side of a merginal extension projectinm beyond the periphery of the outsole of a hoe, a knife arranged to cut against seid bed to trim said extension, and e spring-stressed device urged normally toward said bed and having one portion errenged to bear on the periphery of the outsole to keep the latter out of the cutting field of said knife, said dev'ice having another portion arranged to bear on the trend face of' the outsole to prevent the first said portion from clamping said mergimi extension.

20. A machine for trimming the mergimi extension' pro'ecting from the periphery of the outsole o e Shoe, com rising e cutting bed and a. knife eri-&nge to cut against the same to trim said extension, and a. spring-stressed device arrenged to ceoperate With seid `bed to clemp the outsole without clamping said mer 'nal extension.

' 21. A machine o the character described comprising cooperative members arranged to clemp the mel'gi-nel rtion of the outsole of a, Shoe, a kni e errengeol 'to cut against one of seid; clamping members to trim ofi' any portion of a. Shoe element projeeting letereily beyond the periphery of seid. outsole, end e gege arreed to guide the outsoie eo es to keep it ear of said ARTHUR BATES,

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