US2211065A - Machine for filling heel seats of shoes - Google Patents

Description

Aug. 13, 1 J. T. LANCASTER MACHINE FOR FILLING HEEL SEATS 0F SHOES Original Filed May 22, 1936 2 Sheets-Sheet l Aug. 13, 1940. J. T. LANCASTER MACHINE FOR FILLING HEEL SEATS OF SHOES Original Filed May 22, 1936 2 SheetsShee 2 Z'mnentor Patented Aug. 13, 1940 OFFICE MACHINE FOR FILLING HEEL SEATS .015; z .1 SHOES,'

M John '1; LancasterQNewton',

United Shoe Machinery Gorporation;-Borough,

Jersey 1 of Flemington, N. J., a corporation of New i20s5mr application Maya, 19536, Serial No.

v "81,299. Divided and this application March 13,1938, Serial No. 193,755". v v

' 8 Claims. (01. 12- ,-79.s I

This invention'relates to a machine for applying filling material to a shoe and is herein illuse trated as embodied in a".;'machine particularly adapted to apply a plastic adhesive material to the heel seat of a shoe preparatoryto the attaching of a heel, the present application being a division of application Serial No; 81,299, filed May 22,1936, upon which United States Letters Pgatent No. 2,173,971 was granted-September 26, 1 39.

In the manufacture of shoes it is customary to attach the heels temporarily, for example by cement, while a shoe is on its last, then to perform certain operations upon the shoe, and subsequently to pull the last' and permanently fasten the heel in place by nails driven from inside of the shoe; The heel seatof a shoe commonly consists of the heel end of the insole, a stifi fiber reinforcing piece, theover-lasted'margins of the upper materials, and a portion of the heel end of the outsole in the form of a tab of the general outline of a horseshoe themargin of which has been beveled so as to give its upper surfaces. convexity which corresponds to some extent to the concavity in the attaching face of the heel. A heel seat is thus made up of parts which are fastened together at separate localities, does not present a continuous surface corresponding in shape to the attaching face of the heel, and consists of parts which are spaced from each other at several localities so that certain voids [are present.

It is desirable that the heel seat should be as nearly as possible a, firm solid mass including a substance which fills all the voids, presents a surface which is as nearly as possible the counterpart of the attaching face of the heel, is or can readily be made adhesive so that a heel pressed against it will readily adhere to it, and, when set, is strong and elastic enough to receive and firmly hold the heel attaching nails.

To this end there is provided a machine for preparing a, partly fabricated shoe for the attaching of a heel having a die provided with a cavity the wall of which corresponds in shapeto'that of the attaching face of the heel, meansfor pressing the rim of the cavity against fthebottombf the heel end of the 'shoe, and 'means for forcing filling material into thecavity and against the bottom of the shoe. In the illustrated construction, the shoe is supported bottom side up upon a jack beneath a" die; the die' is moved down toforce the rim of it's cavity against the bottom of the shoe; and a valve is opened'to permitffilling material under'pressure to new from areceptacle'through a conduit-into the'die cavity and upon the bottomlof the heel end of the shoe. A plurality of interchangeable dies having differently shaped cavities areprovided for use with variousheels having differently shaped attached faces.

' Referring to the accompanying drawings,

Fig, lis aperspective of a shoe having a heel seat made according to the present invention; Fig.2;is a side elevation of a machine for applying filling material to the bottom of the heel endiofla shoe; i

Big. Bis a: front elevation of the machine shown in Fig. 2;

v 'Fig'. 4" is a detail .partly in section and partly in elevation showing alshoe in process of having a heel attached by nails; and I Fig. 5 isa similar .detail showing a Goodyear welt shoe having no shank stifiener and with the filling material extending into the space between the shank" portions of the insole andthe outsole. T Theheelseat of a shoe commonly comprises a cavity the bottom of which is formed by a portion of the under face of the insole and the edge of whichis defined aroundthe sides and rear of the heel end of theshoe by the edges-of the overlasted margins of the upper materials, this cavity being more or lesscovered, ifa long outsole is present, by a tabatthe heel end of such a sole. Sometimes a s'mall filler piece'is placed in the cavity. In any case, the parts of the heel seat are sepa-, rated more orless so that, voids are present.

The purpose of the machine shown in Figs. 2

and-3 is to stiffen and strengthen the heel seat by placing upon the bottom of the heel end of the shoe 3,. quantity of plastic" filling material comprising acomminuted solid and a sticky binder, and byapplying pressure to the filling material in such manner as toforce said material into the voids and to impart aproperly shaped surface to the finished seat.

,Slidably-mountedin a suitable horizontalguideway near the bottom of the frame I of the machine is a carrier 9' which may be adjusted in and out (to .theright'or left as viewed in Fig. 2) by turning 'a-hand wheel'l'l which is fastto the stem of a screw 13., This screw is threaded into the frameand'has. int egra1 with it a collar l5 which extends into'la groove in the carrier 9 so that turning the screw adjusts the carrier. Pivotedatl']; betwee'n lugs on the carrier is a block l9 carrying alast pin 2| adapted to, be received in the last-pin hole me last I00 on which a partly fabricated shoe constructionas a whole for thefshoe'which can forms a jack or support be adjusted to aline the 200 is mounted. The above heel end of the shoe with the die presently to be described and which permits the shoe to swing more or less to accommodate itself to the die. Above the jack is a die 23 having in its lower face a cavity the wall of which corresponds to the shape of the attaching face of the heel which is to be attached, the rim of the cavity being adapt ed to be forced against the generally horseshoeshaped margin of the upper materials at the heel end of the shoe and across the shoe at approximately the locality in which the forward edge of the heel will be located in the finished shoe. The shape of the cavity will vary somewhat not only according to the shape of the heel which is to be attached but also according to the kind of sole which is employed. The shoe illustrated in Fig. 4 has a short sole 300 having a small tongue or tab 400; and the forward edge or lip of the Louis heel 500 fits into the space between the tab and a heel breast covering flap 600. In the case of such a heel and shoe, the forward part of the rim of the cavity in the die extends across the tab and part of the overlasted margins of the upper materials at each side of it at a locality containing the point I on the forward edge of the lip of the heel. In the figure, the upper materials have been shown for convenience as consisting of a single layer 800 although it will be understood that there are usually an upper, a counter and a lining at the heel end of the shoe.

The die 23 is mounted for swinging movement by means of alined screws 25 having portions which are threaded through the arms of a fork 21 and cylindrical inner ends which are received in sockets formed in opposite sides of the die. The fork is fastened by a tapered pin 29 to the lower end of a screw 3| which is threaded through a bevel gear 33 and is guided in vertical alined bores formed in two guide members 35, 37 which are rigid with the frame of the machine, said members being located respectively above and below the bevel gear 33, there being above the gear between its hub and the upper guide member 35 a ball thrust bearing 39. A second bevel gear 4| meshes with the bevel gear 33, said gear 4! being fastened by a tapered pin 43 to a short rotatable horizontal shaft 45 to which is also pinned the hub of a crank 41 hav ing a handle 49 by which it may be turned to rotate the bevel gear 33 and thereby raise or lower the die 23.

Fastened to the upper part of the frame by cap screws is a receptacle for filling material which consists of a mixture of coarse sawdust with a sticky binder of pyroxylin rendered soft by a volatile solvent so that the material may be forced out of the receptacle through a conduit into the die. The receptacle has its open top normally closed by a cover 53 hinged to the receptacle at 55 and adapted to be clamped down by an eye bolt 5'! through the eye of which passes a stud 59 mounted in alined bores in two lugs El formed on a wall of the receptacle, the upper end of the eye bolt being adapted to be swung into the position shown between twolugs 63 formed on the cover and having its upper end threaded to receive a clamping screw 65. The cover carries on its under side a gasket which makes an air-tight joint with the top of the receptacle. Into the upper part of the receptacle leads one end of a pipe 61 the other end of which is connected to a source of compressed air, a valve 69 being provided in said pipe. When the valve has been closed the cover 5 3 may be raised and the receptacle may be charged with filling material. The cover may then be closed and the valve opened, whereupon the compressed air exerts a pressure upon the filling material which acts, when permitted to do so, to force the filling material from the receptacle.

From the bottom of the receptacle a flexible pipe H leads to a short horizontal metal pipe 73 which in turn leads into the upper end of a vertical conduit 15 formed in the die 25. The lower end of this vertical conduit opens into a dovetailed horizontal groove which is in communication with the cavity in the die; and slideble in this groove is a valve 11 the lower face of which, when the valve is closed, forms a continuation of the curved wall of the cavity. When the valve is opened, filling material will flow into the cavity, and the pressure upon the filling material will force it into the voids in the heel end of the shoe as to fill these voids completely and also fill the cavity in the die. When new the valve has been closed by being moved to 'theleft (Fig. 2) into the position shown, the die may be raised and the shoe removed with" the filling material 900 (Fig. 1) located properly on the heel end of the shoe and presentingan exposed surface which is the counterpart of the attaching face of the heel. In order to lessen the tendency of the filling material to stick to the polished surface of the wall of the cavity in the die, the die may be heated if desired, for example by means of an electrical heat unit 19 the leads of which are indicated at BI, 83. The valve 11 carries near its outer end a pin 85 received between the arms of a fork 81 the hub of which is fast to a rockshaft 89 to which is also fast the hub of a han- 'dle 9|.

In the'operation of the machine the die is raised by turning the crank 41 in the proper direction, and a shoe is placed upon the jack which has previously been adjusted in the proper position. The crank 41 is turned to force the die down upon the heel end of the shoe as shown in the drawings, the generally horseshoe-shaped part of the rim of the cavity in the die engaging the overlasted margin of the upper material around the rear and along the sides of the bottomof the heel end of the shoe, and the forward part ofthe rim of the cavity extending across the bottom of the shoe in the locality in which the forward-edge of the heel will lie in the finished shoe. The die is pressed against the shoe with considerable force so as to form a tight joint'between the rim of the cavity in the die and the bottom of the shoe, as well as to form a horseshoe-shaped indentation in the overlasted upper material. The handle 9| is manipulated to open the valve 7'! whereupon filling material "is forced into the cavity in the die and upon the bottom of the shoe. closed, the die is raised, and the shoe is removed.

The filling material is sticky when the shoe is removed from the machine, and a heel may be "attached at once by pressing it into place.

Otherwise the cement may be permitted to set hard, in which case it will be activated by treatment'with a softener such as acetone just before the heel is pressed in place. In either case, after the heel has thus been attached by cement, various operations will commonly be performed upon the shoe, the last will then be pulled and the heel nailed to the shoe. For this nailing operation],any'suitable nailing machine may be is clamped against the heel end of the shoe and held firmly during the driving of the nails 99 by means of a tread plate IM and an auxiliary support H33 having a rubber heel-engaging surface. It will be noted that the heel seat of the shoe is exceedingly stiff and firm due to the presence of the hardened filling material, that the holding power of the nails is greatly-increased due to the quantity andnature of the filling material through which they are driven, and that with this rigid heel seat and firm attachment of the heel, the tendency for an unsightly gap to appear between the rim of the heel and the adjacent overlasted margin of the upper is obviated.

Although the invention has been described above with relation to filling and strengthening the heel seat, it is pointed out that filling material will also be forced into whatever space may exist in the shank portion of the shoe. Commonly there is a shank stifiener in the shank portion between the insole and the outsole, said shank stiffener being of such width that there is a narrow space between the insole and the outsole on each side of the shank stiffener into which filling material will be forced to stiffen the shank of the shoe as well as the heel seat. And, by omitting the usual shank stiffener, the filling material may be caused to fill all the space between the insole and the outsole so that, when hardened, it takes the place of the usual shank stifiener.

In Fig. 5 there is shown a Goodyear welt shoe having an insole H00 and an outsole I200, there being no shank stifiener between them so that, in the lasted shoe before the filling 900 is applied, there is a space between the insole and the outsole in the shank portions thereof. With a shoe of this type some of the filling material is forced into this space and, when hardened, takes the place of the usual shank stiffener.

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

1. A machine for preparing a partly fabricated shoe for the attaching bination, a die having a cavity the-wall corresponds in shape to the attaching face of the heel, means for pressing the rim of the cavity against the bottom of the heel end of the shoe, and means for forcing filling material into the cavity and against the bottom of the shoe.

2. A machine for preparing a partly fabricated shoe for the attaching of a heel having, in combination, a die having a cavity the wall of which corresponds in shape to the attaching face of the heel, means for causing relative movement of approach between the die and the shoe to press the die against the bottom of the heel end of the shoe, means for forcing plastic filling material to of a heel having, in comof which flow through the die into the cavity and upon the shoe, and a valve to control said flow of filling material. 1

3. A machine for preparing a partly fabricated shoe forthe attaching of a heel having, in combination, a die having a cavity the wall of which corresponds in shape to the attaching face of the heel, means for causing relative movement of approach between the die and the shoe to press the die against the bottom of the heel end of the shoe, means for forcing plastic filling material to flow through the die into the cavity and upon the shoe, and a valve which is adapted to be closed to prevent such flow when no shoe is being operated upon and is adapted to be opened after the die and shoe have been pressedtogether.

4. A machine for preparing a partly fabricated shoe for the attaching of a heel having, in combination, a die having a cavity the wall of which corresponds in shape to the attaching face of the heel, means for pressing the rim of the cavity against the bottom of the heel end of the shoe, a receptacle for filling material, a conduit leading from the receptacle into the cavity in the die, and a valve for controlling the flow of filling material through the conduit.

5. A machine for preparing a partly fabricated shoe for the attaching of a heel having, in combination, a die having. a cavity the wall of which corresponds in shape to the attaching face of the heel, means for pressing the rim of the cavity against the bottom of the heel end of the shoe,

a receptacle for filling material, a conduit leading from the receptacle into the cavity in the die, and a valve for controlling the flow of filling material through the conduit, said valve when closed forming a part ofthe wall of the cavity.

6. A machine for applying filling material to the bottom of a partly fabricated shoe having, in combination, a support for a shoe, a die having a cavity of the shape and outline desired to be imparted to the filling material, a carrier in which the die is mounted for angular movement, means for causing the die to be pressed against the bottom of the shoe, and means for forcing filling material into the cavity. I

'7. A machine for applying filling material to the bottom of a partly fabricated shoe having,

in combination, a shoe. support mounted for swinging movement, a die having a cavity of the shape and outline desired to be imparted to the filling material, a carrier in which the die is mounted for swinging movement in a path at an angle to the path'of swinging movement of the shoe support, means for causing the die-to be pressed against the bottom of the shoe. and means for forcing filling material into the cavity.

8. A machine for filling a cavity in the bottom of a shoe having, in combination, a die having a cavity of the shape and outline desired to be im-, filling material, a carrier in which.

parted to the the die is mounted for angular movement, a jack on which the shoe is mounted for angular movement, means for causing the dieto be pressed against the bottom of the shoe, and means for forcing filling material into the cavity.

JOHN T. LANCASTER.

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