US1671157A - Machine for preparing heel blanks - Google Patents

Description

May 29, 1928.

R. S. MEGATHLIN I MACHINE FOR PREPARINCT HEEL BLANKS Original Filed May 5. 1922 Patented May 29, 1928.

narran STATES PATENT ors-1c. ,y

RALPH S. MEGATI-ILIN, OF QUINCY, -MASSACHUSETTS, ASSIGNOR TO UNTED SHOE MACHINERY GORPORATON, 0F 'ATERSON, NEW JERSEY, A CORPORATION OFy NEW JERSEY.

MACHINE FOR PREPARING- HEEL BLNKS.

Original application filedMay 5, 1922I Serial No. 558,684. Divifed kand` this application led March 9A,

Y 1925. Serial No. 14,294.

This invention relates to the preparation of heel blanks, and is illustrated a-s utilized in iitting low blanks for rubber heel bases by gouging out the seat surface of each blank and deepening the gouge at thebreast end to form a scallop which is known in the art as a blended Coburn lip.

Until recently it has been necessary, in the preparation of heel blanks which were to have a gouge and a Coburn lip on their seat lsurfaces, to perform the gouging and the lip cutting by two separate operations. lt has recently been suggested that the two operations could be performed in a single machine, shown as comprising a cutter and a turret carrying a plurality of heel holders,

each controlled `by a cam to force a heel blank therein toward the cutter near the end of the gouging cut to deepen the gouge to form a scallop iitting over the shank part of the shoe, forming the desired blended lip or blended Coburn lip. Such a ma chine is shown in United States lReissuey Patent No. 15,448, granted Sept.5, 1922, upon an application filed in the name of Pope.

An object of the present invention is to provide a machine o f diiierent type for per- Y forming the two operations, which will be especially well adapted for preparing certain kinds of heelblanks such as the low rubber heel bases now used for most mens slices and for many womens shoes. In the illustrated machine, the blanks are fed toa stationary knife by two rolls one of which is a roll having a matrix 'or cavity shaped to y'distort the blank in such manner as to cause the knife to gouge the heel-seat surface of the blank and to deepen the gougeat the y breast end of the blank toform a scallop or l so-called blended lip.

A further object of. the'invention is to provide a machine for gouging and lip-cutting heel blanks as described, which has automatic means for feeding the heel blanks successively to the cutting means, as for example from a. magazine. As shown in the drawing-s, a stationary table may be provided to support each heel blank in turn, and a pusher arrangedto reciprocate across the top of the table to advance the heel blanks successively to the gouging and lipcutting means.

l"Other objects of the invention, and various novell combinations and improved parts, will be apparent from the following description K of the invention as illustrated by the ac-y companying drawings in which,

Fig. 1 is a cross-section longitudinally of a machine in which the present invention is embodied;

Fig. 2 is a side elevation of the workengaging parts of the co-operating rolls;

Fig. 3 isa section, partly broken away, through the rolls, on an enlarged scale;

Figs. 4, 5 and 6 are views showing the successive steps of preparing a heel blank according to a novel method; and

Fig. 7 is a longitudinal section of a heel` blank after it has been operated upon by the machine. Asshown in Fig. 1, the general organiza tion of the machine comprises co-operatingA VParts not hereinafter fully described may be, and are shown as being, the same as those described in United States Letters Patent No. 961,736, granted June 14, 1910,

on application of J. R. Scott, and No. 1,300,

627, granted April 15, 1919, on application of E. E. Lane.

As Ashown in Fig. 2, roll 10 comprises ay plurality of sections formed with ,teeth which sink into the waste portion of the work to a greater or less extent. To distort the blanks against the teeth. of roll 10, roll 12 is formedk with a cavity 24 deep enough along its front and sides toy protect the sides and rear end of a heel blank, as shown at 26. AAn intermediate portion28, extending from B to C, in Fig. 3, which grades intoy the deep portion 26 froniA to B, is of an intermediate depth,`and is substantially concentric of theroll, to form the fiat bottom 56 of the gouge in each heel blank 7).

Theinterinediate portion 22 grades into a V shallow portionY 32, extending from C to D, which forms the lip 58.

By comparing Figs. 2, 3, 6 and 7, it will be seen that roll l2 is formed with a sharp rise at'the beginning of the portion A-B, firmly to grip the blank and carry lits forward edge under knife let, then a portion A-B of gradually increasinggradiusto form the `bevel 54, then a concentric` portion `28 extending from B to C to form the bottom 56 of the gouge, and finally a portion 32 them.

`W hen the machine is usedV in gougingA and scalloping` hard heel blanks of substantially uniform thickness throughout, it is desirable toprovide may sink well into the blank and thus avoid putting an undue strain upon the bearings of thev two rolls. In order, however, to permit the use of shorter, thickerV teeth, which are strongery andhence more desirable, the heel blanks, which commonly comprise a pl`usenihling ofne'or morewhole lifts 50 witha,

rality of "heel lifts, may be prepa-red by as lift having a cut-away middle portion such as the horseshoe-shaped lift 52. As shown in Fig.` 2, this assembly is sufficiently near the desired final shape that the short, strong teeth lmay be employed on roll I() Without any undue pressure tending to wedge rolls l0 and l2 apart.

In carrying out my invention, a number of heel blanks are stacked in the magazine 18 under the presser 20. Thereafter pusher 22 advances thefheel blanks successively to rolls l0 and 12 which co-operate with knife lli to form on each heel blank a gouge` 56 and an adjoining blended lip 58.

The, method of assembling` a heel blank of a plurality of lifts one of which has a cut-away middle portion `and then gouging and scallo'ping. the blank y is not herein `claimed but, forms4 the` subjectfmatteij' of application Ser. No. 558,684, filed May 5, 1922,

V`ofwhich the` present application is a division. u

Having described my invention, whatI claim asnew and desire to secure-by Letters Patent of the United States is 1. A machine of the class described having, in combination, a. knife and a pair of rolls for feeding a blank to the knife, one of said rolls having teeth adapted to penetrate the blank and the other ro-ll having a cavity shaped to r'bend themiddle por tionof theblank past the plane of the cut of the knife sulficientlyto cause a gouge to comparatively, long, slender teeth on the roll l0 so that the teeth be formed in the blank and to bend a suc` ceeding portion of the blank progressively still further past the plane of the cut to cause a blended scallop to be formed at the Vbreast end. of` the blank;

A machine ofthe class described `having, in con'ibinatioii,a` knife andra-pair of rolls-for feeding a blank to the knife, one of `said rolls having4 teeth adapted to penetrate said cavity having depth enough around its leading end and sides to receive substantiaL ly the full thickness of the blank, having a shallonT middle portion to'bend the middle portion ofthe blank abovethe periphery of the roll and havingafollowing portion which is progressively shallower than the agouge to `be formed in the blank and to" benda succeeding portion ofthe blank pro-` gressively still' further past the` plane of the cut to cause a blended scallop to be formed at the breast end of the blank.v

4L. A machineof the cl'assdescribed having,

in combination, a magazine for a stack of heel blanks, means for delivering blanks one by one from the stack, a presser roll and acooperating cavityrollto receive between` them vthe blank andthe ther-rollliavinga cavity,

each blank as it is delivered from the stack,

`the cavity being `so-fy shapedMth-at the blank isdistorted first to raise part of the: middle portion of the-blank above the. periphery of `the cavity roll and Vthen to raise afollowing portion vofthe blankjstill fartherv above said Y periphery, and astationary knife adaptedv to` operate` upon` the blank'whiley the blank is `distortedto cutV in ita gouge and a blended scallop.`

5. Acavity rollY for a machine. of the class `described having formed therein a cavity` comprising a deep horseshoe-shaped portion 26 to receive. thesidel and rear portions of a heel.blanlnandV a portion of 4less depth between the arms of the horsesheeto distortthe blank for gouging and lip-cutting, the

horseshoeshaped portion being of somewhat

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