USRE18260E - messmer - Google Patents

Description

Nov. 24, 1931. C A MESSMER, JR Re. 18,260

DIE

Original Filed Oct. 26, 192'? 2 Sheets-Shear l IN VEN TOR.

ATTORNEY 5 Hnm BY ma auna@ NOV. 24, 1931. Q A MESSMER, JR Re. 18,260

2 Sheets-Sheet 2 DIE Original Filed OCT.. 26, 1927 A Lfwf E n f '5: j

[Nl/EN TOR. ada-u @i 44. a

ATTORNEYS @Jam Ressuecl Nov. 24, 1931*l UNITED STAT-as l Re. 18,260

-PATENT. OFFICE CHARLES A. MEssMER, Jn, or Sfr. LOUIS, MISSOURL AssfIGNoii To BENJAMINW.

. FREEMAN, or CINCINNATI, oHIo ,v Y

DIE

Original No. 1,718,476, dated .Tune 25, 1929, Serial No. 228,748, led 'October 26, 1927; Application for reissue med fcetober. 1a, 1930. serial No. 488,478.

This invention relates to dies forcutting or dieing out blanks from sheet material such as leather, fiber-board, cloth', or the like, and pertains more particularly to dies of thetype used with a cut-out press for cutting out ornamental perforations and the like in the fitted uppers of shoes, slippers, and the like.

The cut-out presses used for this purpose usually comprise a vertically reciprocating head or hammer that descends on the die and a slide table having guide grooves there-` on that co-operate with a block that depends from* the underside of the front portion of the die and is slidable on the table so that the die may be shifted from under the head' towards the operator to facilitate the insertion in or removal fromy the die'of the work or blank that is to be operated on, and'may again be shifted back under thehead preparatory to operating the press. The rear portion of the diel when under the headis supported bya stationary post on the table, andthe said yrear portion is unsupported when the die is pulled toward the operator into loading or unloading position,.thereby affording clearance for the passage over the rear end of the die of the fitted upper whose one side overlies the die and whose other side underlies the die. Otherwise stated,r the rear end of the form of die used prior to this invention overhangs to project into the interior of the fitted upper, and the overhanging rear portionv is supported by the stationaryl post on the slide table only when the die is pushed under the head. Furthermore, a stripper plate that serves, also, as a locating'plate is hinged -to the rear top face of the die and this plate must be lifted each time an upper is inserted or removed, since, to insert/the upper,` it must be passed in embracing rela tion over the plate prior to passing it; over the rear end lof the die, and'to remove it this procedure must be reversed. Manifestly, the aforesaid awkward and indirect manner of reloading the die requires considerabletime and impedes production. i g

Accordingly, it is an object'of the 'present invention to-provide a d-ie for the purpose set forthV that is so arranged that the uppers may beinserted therein or removedtherefrom by a shorter, more direct, and more convenient path than that through which the uppers are applied to the aforesaid old form of die, thereby simplifying the operation and expediting production. The perforations are often designed to be non-symmetrical, sothat right and left dies must be used 'respectively for the reversely shaped perforations of the opposite sides of the shoe in order to bringthe inside of the upper against theiface of the die.

Accordingly, another object of the invenl tion is to provide a single die ofthe charac-v ter described that is adapted for cutting the reversely shaped perforations of both A'sides of the fitted upper, thereby avoiding the eX- pense of two separate dies, as has heretofore been necessary. for this purpose.

rlh-e aforesaid hinged stripper or locating plate is formed kof sheet steel and is slightly flexible, and, on account of the horizontal pivotal axis of the'hinges'not being vertical# ly shiftable, the plateY is bent or slightly distorted when 'the' `head ofthe' press descends on it in order to maintainthe plate parallel to the face of the die, the distortion includ-V ing a slight forward or backward displacement of the plate that bringsl the apertures in theplate out of their correct relation to the cutting edges ofthe dieblock. v y f- It is accordingly a furtherobjectofthe inventionv to provide a form of hinge for the aforesaid plate which shall 'yield vertically to maintain" thev plate paral'lelto the face of the die when the head of the press descends thereonV andv thereb prevent anyaccompanying longitudinaly isplacement of the plate with relation to the die.

*Other objects or advantages, more or rless ancillary tothe foregoing will appear lin the course of the following description of a *pre ferred embodiment of the invention that has been selected for the purpose. of illustration only and not in a limiting sense.

' In the accompanying drawings, forming part of this specification, in which like num-` bers of reference denote like parts wherever they occur, l

Figure 1 is a-Qperspective view ofthe' die" of this invention. t

Figure 2 is a vertical front-to-rear central sectional view, showing the die in open position.

Figure 3 is a fragmentary sectional view taken on the line 3-3 in Figure 5;

Figure 4 isa fragmentary sectional view taken on the irregular line 4-4 in'Figure 5.

Figure 5vis a plan view of the die as it appears when'closed, a part of theupper plate ing broken away.

Figure 6 is a front elevation of the same.

The die comprises a base 1, a die block 2, l

a stripper 3, and a locating device 4 to facili` tate the positioning of the stock onfthe die, and over the stripper. The base 1 is a sub-v stantially Vrectangular slab of-metal bifurcated or recessed at its rear end to form a pair of arms 5 that straddle a portion of the cut-out press therebetween. The die block 2 is supported on and spaced from the base 1 by columns 6,' preferably ofsleeve formation to accommodate therethrough'thescrews 7 that draw the base 1 and block 2 against the ends .of the spacers 6. The die block 2 presentselevated portions 8 on its upper face that operate on .the stock- In theillustrated embodimentthe portions 8 terminate upwardly in-cutting edges 9 thaty areadapted to form ornamental perforations in the stock,y the scrap passing downthrough theV openings 10 that extendthrough thevv block andare de-` Y lined bythe cuttingedges 9.

' The' stripper-3 preferably'comprises a thin plate or metal sheet 11, having riveted or otherwise suitably attached thereto the dependingfstuds12, that fit slidably in openings 13 in the block 2. The openings13lenlarge attheir upper endsrto form sockets 14 for receiving the expansible springs V15 that are coiled loosely around the studs 12 and bear against the underside of the stripper plate 11. The lower ends of.v studs 12 ,are internally screw-threaded to receive screws 16 whose heads 17 are adaptedto. abutv against the under side 'offtheblock 2 and thereby limit the ascent of the plate3 under the impulsion of the springs 15. Plate 11 is provided with o enings 18 therethrough to accommodate tlie portions 8 when the plate descends. i` Y 4 The .rear ends of the arms 5 are-provided with screw-threaded openings therethrough toreceive the externally screw-threaded lower endsjl9 ofrsleeves 20,'thatare provided with intermediate annular flanges 21 that present shoulders 22 and 23 that are-adapted to react respectively against the upper face of the base 1 and the lower ends ofthe eX` pansible springs 24, loosely coiled around the sleeves 20. The lower end of each jof the sleeves 20 is larger in internal diameter than the upper end of the sleeves in order to lleave a shoulder 25th'at isradapted to be enga-ged by the head 26YV of "ascrew'27 screwedinto a tapped hole in the lower end of a stud 28,

that fits slidably in the upper end of the sleeve 20. The upper end of each stud 28 enlarges to form a shoulder 29 against which cated to receive between prongs 30 the tongues 31 of the studs 32, whose upper 4ends 33 are riveted or otherwise suitably secured to y the locating plate 4. Tongues 31 and prongs 30 are pivotally connected by a pin 34, that passes through they prongs and tongues of each pair of st uds28 and 32. Pin 34 is preferably held against longitudinal displacement by means of'nuts or knobs 35, that lit the 'externally screw-threaded ends 36 of the pin 34. Plate 4containsopenings 37 that conform inoutline to stitches or other identifyingcharacters on the fitted upper, and that serve thereby tolocate the itted upper correctly with relation to the edges 9 ofV the die. Plate 4, also, contains openings 38 that are adapted to register with similar openings 39 in plate 11 when the plates are correctly positioned with relation to one another.

An inverted U-shaped strap 40 .has its eX- tremities 41 attached to the rear ends of the straddling portions 5 of the base 1 by means ofk screws 42, the intermediate portion v43 of said strap being adapted to pass over the aforesaid stationary post of the press and to trip a vsafety device thereon. The construction of the die having been fully described, the manner of using it will be readily understood. The base 1 of the die fits slidably in the groove of the table orrbed of the press so that it may be withdrawn from under the head of the press to a position in frontofthe operator.A Assuming the die-to be in front of the-operator preparatory to placing a blank or .itted upperthereon, the operator lifts plate 4 to the position shown in Figure 2, and places the fitted sleeve upper 44 around one vvof the interiorly projecting tongues 45 of the stripper plate 11. It. will be observed that the space .46 between the tongues 45 allows the operator to place his lingers on that portion of the underside of the plate 4 that immediately overlies the said space, thereby facilitating the lifting of the plate 4. lW hen the upper has been so placed,

loo

the pla-te 4 is lowered, and the upper or blank 44 is shifted untilrthe appropriate locating characters thereon,fsuch, for instance, as a line of stitchin or the edge of an overlaid A portion follow t e outline of the openings 18 in the plate 11.'A The operator then presses .the plate 4toward' the tongue 39 between his fingers, therebyV clamping the upper between Y the plates 4 and 11, and then pushes' the die untilthe. upper has beendied-ouh the `scrap descending through thefopenings in the die that laredeined by the edges 9.y On the: up-l rises under the impulsion of the sprin s 15- and also, `by reason of the expansible e orts f t f esprings 24. The die isthen Withdrawn from its position under the headof` the press and thek plate 4 is lifted, andthe blank or upper removed,.and placed on the other side of the die to die out the opposite sides of the shoe, the foregoing cycle of operations being, of course, then repeated.

It will be observed that the block 2 overhangs the spacers 6 so that it can be straddled by the itted upper, and that the upper can be applied to the die and around an interiorly projected tongue 45 much more quickly and with less manipulation than it can over the stripper plate and then back over the posteriorly projected portion of the dies hitherto in use. Furthermore, the upper can be shifted through a wider range of positions on the present die than on the older forms of die, because the present die oiers less obstruction.

It will, also, be observed that the single die illustrated is capable .of cutting the reversely shaped perforations of both sides of the upper, thereby avoiding the expense of two separate dies, one sideof the shoe upper being held between the plate 4 and one of the tongues 45 and cut by the forming means 8 adjacent to the said tongues, after which the other side of the shoe is held against the other tongue 45 andr cut by the reversely shaped forming means 8 adjacent thereto.

Attention is further directed to the fact that the plate 4 can not be distorted and shifted inadvertently forward or backward, such distortion being prevented by reason of the vertical shiftability of the hinges under the pressure of the head of the press, thereby insuring at all times the proper lateral positioning of the locating plate or mask 4 with relation to the die block 2.

The pin 34 insures the alignment of the pivotal axis of each hinge post with that of the other, and the pin may be easily removed to detach plate 4 from the die by unscrewing the nuts 35.

Should the die be accidentally dropped on the Hoor or otherwise abused, any resulting dislocation of plate 4 with relation to the cutting edges of the die may be detected by reason of the fact that holes 38 in plate 4 would not in that event register with the holes 39 in plate 11. n

Having thus fully described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as it is evident that many minor changes may be made therein without departing from the spirit of this invention or the scope of the following claims.

- I-claim: y

1. In a. diev unit having a basev member, a die block carried thereby, and a work locatin member mounted in hinged relation to said base; a support for said member comprising a pair of posts connecting the locating member to the base member, each of said posts comprising a pair of pivotally connected studs, one of which is rigidly attached, to one of the members, and the other of which is slidably connected to the other of said members so as to be movable transversely thereto, and resilient means interposed between said last-mentioned elements whereby said memberszare yieldingly spaced apart 2.111 a die; unit havinga base member, a diel block carried thereby, and a work locating plate for the unit; a support for said. plate comprising a pair of posts connecting said base member. and plate, each of said posts comprising a pair of studs, one of which is attached tosaid basemember yandthe other of which is connected to said plate, a single pin passing through-the fourstudsand pivotally connecting together eachpair of studs that formera .respective post, and means permitting vertical movement ofV said plate.

3. In a die unit having a base member, a die blockyand a work locatingpl'ate for the unit, a 'support'r for said'plate comprising ka pair of posts connecting saird base memberl andplate,each of said postscomprisinga pair of studs, eachstud of said pair of studs being connected to a respective one of said members, a single pin passing through the four studs and pivotally connecting together each pair of studs that form a respective post, the said pin having enlargements on either end to prevent longitudinal, displacement thereof, one, at least, of the said enlargements being detachable to permit the withdrawal of said pin from said studs and means permitting vertical movement of said plate.

4. In a die unit having a base member, la die block carried thereby, and a Work locating plate for the unit, a support yfor said plate comprising studs rising vertically from the rear of said base member, means hingedly connecting said plate lto said studs, and resilient means associated with said studs effective to permit vertical movement of said locating plate thereby to maintain the same parallel to the face of said die block.k

5. In a die unit having a base member, a die block carried thereby, and a work locating plate for the unit, al supportfor said plate comprising studs extending from the rear of said base member,studs'hingedly connected to said first-named studs, means connecting said plate to. said rsecond named studs, vand resilient means encircling `said first-named studs 'effective to permit vertical movement of said locating plate thereby to maintain the same parallel tothe face of 'said die block during operation et sai-d die. l

die block carried thereby, and a work locatf 6. In a die unit having a base member, a

ing plate for the unit, a support for said late comprising sleeves extending upwardly rom the rear of said base gmember, studs -mounted in' said sleeves, means connecting said plate to said studs for angular movement relative to said block, and resilient means associated with said studs and cooperating with the same and said slee-ves to permit vertical movement of said locating plate to maintain the sameparallel to the face of said die blockv durin the operation of said die.

7. E die unit for use in a shoe ornamenting machine comprising in combination, a base, spaced pillars extending from f said Y base carrying a die block having registered openings therein to permit the passage oi chips into the space between said pillars; work sup'-V porting means, a gauge plate effective to locate vwork with respect to said supporting means, and resilient means including additional pillars extending from said base, to mount said plate independently of said die block for yielding movement relative to saidwork supporting meansand normal to the' plane of said die block. Y f f 8. A die unit for use in a shoeornamenting machine comprising in combination, a base, spaced pillars extending from said base lcarrying a die block having registered openings therein to permit the passage of chips into the space between said pillars, work supporting means, and a locatingv plate and means on said base to mount said plate for movement relative to said work supporting means and normal to the plane ofsaid` die block, said means including a pivotal connection to said plate whereby the plate may be moved angularly with respect to said die block. c

. 9. A die unit for use in a shoe ornamentingy machine comprising in combination, a base, spaced pillars extending from said base carrying a die block having registered openings therein to permit lthe passage of chips into the space between said pillars,a stripper rmounted on said block, a locating plate and means resilientlymounting said plate independently of said die block for movement to and from andin a plane normal to the-plane of said die block.

l0. A die unit for use in a shoe ornament-Y ing machine comprising in combination, a base, spaced pillars extending from said base carrying a die block having openings therein to permit the 'passage of chips vinto the` spacebetween said illars, said pillars being substantially cylin rical in section,ay work structure is movable into positiontozbe ac-

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