US1382006A - Lasting mechanism - Google Patents

Description

T. LUND.

LASTING MECHANISM. APPLICATION FILED SEPT. 1 2, 3918.

1 82,006. Patented June 21, 1921.

Wvmvrmz- UNITED STATES PATENT OFFICE.

THOMAS L'UND, 01 BEVERLY, IvIASSACl-IUSETTS, ASSIGrllORv TO UNITED SHOE OF NEW JERSEY.

LASTING MECHANISM.

Application filed September To aZZ to item it may concern:

Be it known that I, TEZODIAS LUND, a citizen of the United States, residing at hererly, in the county of Ess x and at Massachusetts, have invented certain improvements in Lasting lilechanism, oi which the following description, in connection with the accompanying drawings, is a specilica tion like reference clmracters on the drawings indicating like parts in the several figures.

This invention relates to mechanism for use in the lasting or analogous shaping or forming of upper materials in the manufacture of boots and shoes and more particularly to the provision or" means for trinnining oil the surplus margin of the upper materials. The invention is herein ill .strated as embodied in a construction designed for use at the toe end of a shoe, but it is to be understood that in many of its aspects the invention is not thus rest i ted in its applicability.

It has been the usual practice heretofore, after shaping the upper around the toe of a shoe and securing it in lasted position, to trim or? the surplus margin of the upper materials as a subsequent operation by th use of a separate machine. An object 01 this invention, among others is to movide a construction whereby the margin of the upper may be trimmed quickly and effectively at the time of the lasting or analogous upper shaping operation. it feature of the invention consists in a novel eons struo tion and arrangement comprising}; upper trimming means opcratively movable between ppershaping means zunl the :nljzn cent surface of the upper to trim oil the surplus margin oi? the upper. The cor truction shown comprises a cutter n'iovable along the cverwiping faces 01" end embracing wipers between said faces :indthc orerwiped upper to trim oil the surplus margin oi? the upper gatl'iered inwardly in :tront of the wipers. An advantageous churucteristic ot the illustrative construction comprises an or rangement wherebv the upper trinuning means is operable independently oi the'upper shaping means. thus permitting the upper to be shaped in the required manner without interhn'cnce oi the trimming means and permittin he use ot the latter at such relation to the upper shaping opera- Specification of Letters Patent.

Patented June 21, 1921.

12, 1918. Serial No. 253,693.

tion as may be most advantageous for the character of the particular work under treat ment. A further novel and advantageous characteristic of the construction shown is to be recognized in an arrangement whereby the cutter, which is movable between the over-wiping means and-the shoe, is beveled at its cutting edge on the side facing the shoe materials. Such an arrangement of cutter and wipers, for example, permits the cutter to be forced inwardly along the overwiping faces of the wipers with its cutting edge substantially in the plane of said faces, thereby avoiding damage to the shoe by rendering said edge ineffective to out said materials until. it arrives in position to engage that portion of the margin of the upper which is positioned in front of the wiper edges.

A further feature of the invention resides in the provision or upper trimming means adapted to be used in combination with means which holds the upper in position for trimming by inserting it under said holding means. for example between said means and a portion of the shoe materials. In the con struction shown the cutter is arranged to be maintained substantially out of engagement with the shoe until the wipers have worked the margin of the upper inwardly over the shoe bottom and then to be wedged inwardly between the wipers and the overwiped up per. An advantage of this arrangement, among others, is to be recognized in the further tightening and compacting eilect of the t1 ming means upon the overwiped margin oi the upper.

, i ltillyanother feature of the invention resides in a simple and effective construction ainl arrangement for trimming oif the entire surplus margin of the upper at the end of a shoe at a single operation, the construction shown comprising a cutting blade constructed and arranged to extend across the entire gathered margin of the upper from one side to the other to trim oil the surplus margin by a single cutting movement lengthwise of the shoe.

These and other features of the invention will appear more fully from the following description of an illustrative embodiment of the invention considered in connection with the accompanying drawings, and will he then pointed out in the claims.

Figure 1 of the drawings is a view in side elevation partly in section, of the toe last-V wipers and trimming cutter.

The toe lasting mechanism selected for illustration and exemplifying a type of lasting mechanism in which the upper trimming means may be used is of the general type disclosed in prior United States Letters Patent No. 1,018,477, granted February 27, 1912,

; on application of Matthias Brock, and comprises the base 2 for the toe lasting mechanism supported for vertical treadle effected movement and for longitudinal adjustment by hand wheel and screw as shown in said patent and on which. the carriage 4 is pivoted for angular transverse adjustment by a hand wheel 6 and a screw (not shown). The toe lasting head 8 is pivotally mounted by means of an arm 10, on a spindle 12 extending transversely of the carriage 4 and is vertically adjustable through a threaded rod 14: upstanding from the carriage 4: and having an operating crank 16. A toe support or rest 18 is guided for vertical movement by the base 2 and cooperates with a hold down 20 (Fig. 2) to clamp the toe end of the shoe in position to be operated upon by the toe lasting mechanism. Toe wipers are secured to the under sides of carrier plates 24 which are mounted in the head and are retained on said head by a plate 26. These wiper carriers and wipers are advanced and closed by link connections from a plunger operated cross bar and by cam 7 slots in the carrier plates and cooperating rolls carried by the head 8, as shown and described 1n said prior patent. The head 8 is formed with a bore to receive and guide the wiper-operating plunger 28 to the forward end of which the cross bar 30 is attached. The plunger 28 is reciprocated through a hand lever 32 pivoted to the head 8 and having alink 34 connected to a member 35 fixed on the rear end of the plunger.

In accordance with the present invention, in its illustrative embodiment, the bore which receives and guides the plunger 28 is enlarged to receive a tubular plunger 36 within which the wiper operating plunger 28 is seated for sliding movement, the forward end of the tubular plunger being cut down to expose the forward end of the wiper plunger 28 whose end, in turn, is out down to form a seat for the cross bar 30 (see Fig. 4;) which is pinned to this end of the plunger. An upper trimming cutter 88 has a rearwardly extending shank portion 40 (Fig. 3) bifurcated to straddle the forward end-of wiper plunger 28 and secured, as by screws, to the cut down edges of the fo ward end of the tubular plunger 36. The forward cut down ends of plungers 28 and 36 are relatively formed to provide sufficient clearance between the under face of cross bar 30 and the upper face of the shank 40 of the upper trimming cutter.

1 The forward edge of the cutter 38, which in the construction shown is curved similarly to the end of the shoe and located immediately below and contiguous to the overwiping faces of the wipers 22, has its edge beveled on the side facing the upper materials and concaved to form a chisel cutting edge42 which is effective to plane off even with the lower faces of the wipers that portion of the upper gathered in by the wipers which is located ahead of their wiping edges. The cutter is operable independently of the operation of the wipers by operating means connected to the rear end of the tubular cutter plunger 86 and operable independently of the wiper operating plunger 28 and lever 32.

For this purpose, the rear end of the retracted tubular plunger 36 terminates forwardly of the rear end of retracted wiper plunger 28 a sufficient distance to permit a full, or substantially full wiper advancing and closing movement of the wiper plunger before the lever connected member 35 on the end of said plunger contacts with a transverse bar 44 fixed at its central point to the rear end of the tubular plunger 86 and bored to receive the wiper plunger 28. To the op posite ends of the cross bar 4% are threaded the forward ends of spaced rods 46 which extend rearwardly to and are threaded into a bifurcated head 48'. A cutter operating hand lever 50 is connected to the head 48 and is pivoted at one end to a link 52 which in turn is pivoted to the toe lasting head 8 in axial alinement with the pivot of the wiper operating lever 32.

From the preceding description it will be clear that the upper trimm' f cutter is operable independently of the wipers and may be operated at that time or point in the lasting operation when the removalof the surplus upper materials may be effected to best advantage. In the operation of the described and illustrated mechanism, the toe lasting mechanism is bodily moved vertically 3y a treadle and the toe wipers are partially advanced and closed to upwipe the toe as in the machine of said prior pat-- ent, the wipers being thereafter advanced and closed over the edge of the sole to lay the upper down over the sole edge. As the wipers gather the upper in over the margin of the shoe sole, plaits form in the upper in advance of the wiper edges and iresist the closing of the wipers and the flattening down of the upper.

The wipers may be wholly or partially advanced and closed and retracted and opened as many times as is'necessary to mold the upper closely to the face of the sole without operating the trimming knife. In lasting light shoes-having thin upper stock, the plaits formed in advance of the wipers offer less resistance than with shoes having heavy upper materials and the upper trimming knife may be operated substantially at the end of the lasting operation, if desired, or may be advanced to plane off the surplus upper after the wipers have been advanced and partially closed. over the sole which is the preferable procedure in lasting heavy shoes having heavy upper stock. In either case the wipers preferably are partially backed off from fully closed position or are only partially closed so as to expose in advance of the wipers that portion of the overwip-ed upper stock which is to be removed.

The use of a trimming knife with its beveled chisel edge arranged as above described is particularly advantageous in thatthe advance of the knife through lever 50 and plunger 36 to insert its beveled edge between the wipers and the shoe causes the knife first to exert a wedging final ironing down pressure against the upper at the edge of the sole, producing a sharp clearly defined edge formation and thereafter to plane oil level with the under face of the wipers that portion of the upper in advance of the wiper edges, thereby providing a fiat seat for the outsole. It will be evident, moreover, that with the bevel at the edge of the knife facing the overwiped upper materials there is no dan er of scraping that portion of the surface of the materials which underlies the wipers.

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

1. In mechanism of the class described, in combination, means for gathering an upper inwardly around the end ofa shoe, and independently operable upper trimming means permanently associated with said gathering means, said upper trimming means comprising a cutter guided for trimming movement inwardly over the shoe bottom in a direction substantially parallel to the lengthwise dimension of the shoe and constructed to extend continuously across the shoe from one side of the gatheredupper to the other side to trim off the entire surplus margin of the upper around the end of the shoe at a single operation.

2. In mechanism of the class described, in combination, a lasting wiper for working the upper inwardly over the margin of the sole of a shoe, and upper trimming means comprising a cutter permanently positioned substantially in the plane-of the overwiping face of said wiper and operable independently of said wiper.

3. In mechanism of the class described, in combination, a lasting wiper and manually operable means for advancing said wiper ver the edge of a shoe sole, an upper trimmer permanently associated with said wiper and guided for operative movement between the shoe andrthe overwiping face of said wiper, and means for independently and manually operating said trimmer to trim off the upper material extendingbeyond the inner edge of said wiper.

4. In mechanism of the class described, the combination with end embracing wipers, of upper trimming means comprising a single cutting blade permanently positioned for movement in plane substantially parallel to the plane of the wipers and in such relation to the wipers as to trim oil the entire surplus margin of the upper gathered inwardly by the wipers.

5. In mechanism of the class described, in combination, means to gather the upper inwardly over the margin of the sole of a shoe, and a thin chisel-edged cutter associated with said gathering means and supported and arranged for movement between the gathering means and the underlying face of the inwardly-gathered upper to trim oil the upper extending inwardly beyond said means.

6. In mechanism of the class described, the combination with overwiping means, of upper trimming means comprising a cutting blade mounted for movement along the overwiping face of said overwiping means between said face and the shoe, said blade being beveled at its cutting edge on the side facing the overwiped upper materials.

7. In mechanism of the class described, in combination, end embracing wipers, and upper trimming means associated with said wipers and constructed and arranged for operative movement between the over-wiping faces of the wipers and the adjacent face of the upper gathered inwardly by said wipers.

8. I11 mechanism of the class described, the combinationwith end embracing wipers, of upper trimming means comprising a cutting blade adapted to be inserted under the wipers after the wipers have been closed inwardlv over the shoe for trimming off the surplus margin of the upper.

9. In mechanism of the class described, the combination with end embracing wipers, of an upper trimming cutter mounted with its cutting edge closely adjacent to the overwiping faces of the wipers, and means operable independently of the wipers to advance the cutter along said faces between the wipers and the in'wiped upper and to project it inwardly beyond the wipers to trim the upaer.

l 10. In mechanism of the class described, the combination with means for wiping the margin of an upper inwardly over the sole of a shoe, of uppper trimming means comprising a cutter constructed and arranged to be wedged inwardly between said wiping means and the shoe to compact the overwiped upper on the margin of the sole and to trim off a portion of the margin of the up per extending inwardly beyond said wiping means.

11. In a mechanism of the class described, the combination with means for wiping the margin of an upper inwardly at the bottom of a shoe, of upper trimming means comprising a cutter arranged to be maintained in a retracted position out of engagement with the shoe during the operation of said wiping means and to be moved subsequently inward between said wiping means and the overwiped upper to trim off a portion of the margin of the upper. V

12. In mechanism of the class described, the combination with means for gathering the margin of an upper inwardly around the end of a shoe, of upper trimming means comprising a cutting blade constructed and arranged to extend across the opposite side portions of the gathered margin of the upper and to be moved lengthwise of the shoe to trim said opposite side portions of the margin simultaneously.

13. In mechanism of the class described, in combination, means for gathering the upper material inwardly over the edge of the sole of a shoe and for holding it in position for the removal of the surplus material. beyond said gathering means, and an upper trimming knife permanently associated with said means and located immediately adjacent to said means, said knife having a beveled trimming edge arranged to be wedged between the gathering means and the underlying face of the upper to compact the upper on the margin of the sole and to plane off substantially even with the overlying face of the gathering means that portion of the upper extending beyond said means.

14. In mechanism of the class described, in combination, means operable to hold shoe upper material down upon the margin of the sole in position for the removal of the surplus upper material, an upper trimming chisel cutter arranged for insertion between said holding means and the underl ing face of the upper to trim off the surplus upper material beyond said holding means, and operating means for said cutter.

15. In mechanism of the class described, the combination with a wiper for wiping the margin of an upper inwardly at the bottom of a shoe, of upper trimming means comprising a cutting blade mounted for operative movement along the overwiping face of said wiper between said face and the overwiped upper to trim off the surplus margin of the upper.

16. In mechanism of the class described, in combination, means to gather the upper at the toe inwardly over the margin of the sole of a shoe and to hold it for the removal of the surplus upper, and upper trimming means comprising a cutting blade associated with said gathering means and constructed and arranged for insertion between the gathering means and the underlying face of the ingathered upper to trim oil the surplus upper entirely around the toe end by a single cutting movement.

17. In mechanism of the class described, the combination with end embracing wipers and means for operating said wipers, of upper trimming means comprising a cutting blade having a cutting edge curved to embrace portions of the margin of the upper extending inwardly beyond the edges of said wipers along the opposite side portions of the shoe, and means for moving said blade inwardly over the shoe bottom lengthwise of the shoe to-trim ofi said opposite side portions of the margin of the upper.

18. In an end lasting mechanism, last and shoe supporting means, end embracing wipers, a plunger for operating said wipers to wipe the upper over the edge of the sole and to hold it in position for the removal of the surplus upper material beyond the inner edge of said wipers, an upper trimming knife supported immediately adjacent to said wipers, and a second plunger concentric with said first named plunger for operating said knife. 7

19. In an end lasting mechanism, in combination, a last and shoe support, end lasting wipers mounted for movement to wipe the upper inwardly over the edge of the sole, an upper trimming cutter supported immediately adjacent to the active faces of said wipers, a tubular plunger to the forward end of which said knife is connected, and a wiper operating plunger guided in said tubular plunger and movable to actuate said wipers independently ofsaid tubular plunger.

20. In mechanism of the class described, the combination with end embracing wipers, of upper trimming means comprising a cutter constructed and arranged to extend continuously across the end portion of the shoe from side to side, and means for moving said cutter inwardly over the shoe bottom betweenthe wipers and the shoe to trim off a portion of the margin of the upper extending inwardly beyond the edges of said wipers.

In testimony whereof I have signed my name to this specification.

THOMAS LUND.

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