US2318399A - Heated press - Google Patents

Description

May 4, 1943. c. L. IHUNTOON HEATED PRESS Filed June 20, 1941 INVENTOR. CULLEN L. HUNTOON cluding a heater,

Patented May 4, 1943 HEATED ritiiss Cullen L. Huntoon,

St. Louis, Mo., assignorrto' Landis Machine OompanmSt. Louis, Mo., a cor poration of Missouri Application June 20, 1941, Serial No. 398,885

4 Claims.

The invention relates particularly to shoe presses of the type used in cementing shoe soles or half soles to the uppers and insoles or in cementing patches to any part of the shoe, and the invention is particularly adapted for use in shoe repair shops where the demands for work of this kind do not justify the outlay and space for equipment used in shoe manufacturing 'plants for heating and drying lasts and cemented shoes.

The main object of the invention is to supply an adequate amount of heat directly to the work opposing parts of a press and to work clamped between the same and to the air surrounding such parts and the work.

It is an additional object to effect this heating from a single source externally of the last and the pad so that when the flow of heat from the source is terminated the parts may begin to cool without awaiting the cooling of an internal heating device.

An additional object is to source of heat for a additional press tion.

These and other detail objects of the inven tion as will appear hereafter are attained by the structure embodying one form of the in utilize the same given operation to heat parts for a subsequent operavention and illustrated in the accompanying drawing in which- Figure 1 is a side view of an apparatus ina shoe press and supplementary press parts.

Figure 2 is a diagrammatic source of heat and heated thereby.

The press indicated at I is mounted upon a table land may consist of any suitable device of this nature but, as illustrated, corresponds to that shown in an application by the present inventor, filed December 16, 1939, Serial No. 304,675, now Patent No. 2,268,874, issued January 6, 1942. It includes a base 3 mounting a detachable tray 4 which supports a cushion 5 of rubber-like material. A crank wheel 6 is provided with a worm gear connection (not shown) to a crank shaft 1 connected by links 8 to a bracket 9 on a last I over which a shoe is placed and by means of the links, crank shaft and gearing the top view of the the portions of the device 'last may be thrust towards the cushion, and a shoe sole and upper or other parts to be ccmented are clamped between the cushion and last.

At one side of table 2 is a standard ll terminating at its upper end in a bracket I2 mounting a hinged arm I3, the right hand end of which mounts an electric socket M for a radiant heat lamp I which may be of the reflector type or may be provided with a separate reflector l6. Preferably the lamp isof the high wattage type producing an intense heat, most of which is in the infra-red portion of the spectrum, and

hence .is a highly. eflicient radiant heat generator. 7

While the lamp is associated with the press it is positioned exterio'rly of the cushion and the last and the work and it may be tilted to the best angle to direct its heat towards the last and the work and through the air surrounding the same and against-the work face of the cushion.

Preferably supports I1 and I8 are provided adjacent to the press for holding an additional cushion 'l9 and an inverted last .20 in position to receive heat from the lamp, but these additional parts do not interfere with the heating of elements 5 they may underlie these elements in part. With this arrangement, during one cementing opertion, another last and cushion may be preheated for use in a succeeding cementing operation.

The structuredescribed above possesses substantial advantages over heating arrangements previously provided for shoe presses, particularly when such presses are used in shoe repair shops. With the present structure, heat from a single source is quickly and efiectively applied to the cushion, to the last, to the work clamped between them, and tothe surrounding atmosphere, thereby evaporating moisture in the atmosphere and in the cement on the work and effecting a satisfactory drying of the cement in a small fraction of the time required to dry the work and set the cement with the same amount "of heat supplied through the work support or by convection.

' cushion; Hence, the

'It has been suggested previously that an electric resistance element may be imbedded in the cushion or a similar or other source of heat placed beneath the cushion. Either of these forms results in the primary application of the heat to a part of the cushion spaced from the work and, obviously, the part of the cushion nearest the heat source is heated most intensely and the portion of the cushion nearest the work only receives the heat transmitted through the present arrangement is not only more eifective but the cushion is less likely to be injured by the intense heat which tends to break down the resilience of the rubber and shorten the useful life of the cushion. If the resistance element is imbeddedin the cushion, it is subject to being flexed according to the distortion of the cushion and this is injurious to the heating element. Usually such resistance elements are of restricted area and obviously the surface of the cushion immediately adjacent to the elements are heated to a higher degree than the remainder of the cushion surface. With applicants structure the heat is evenly distributed and I0 and the work although difiiculty.

is otherwise shielded from the heater.

over the entire cushion area and this avoids warping and buckling of the work, which may result in the additional disadvantage of impairing the composition filler between the shoe sole and insole.

By making the lamp readily adjustable to and from the work, the amount of heat may beeasily varied according to the thickness and area of the work or, if different grades of ce ment are used, according to .thenature of' the same. By mounting pressure applying member 9 at the swinging ends of links 8, the last and What is claimed is: 1. In an apparatus for cementing leatherlike parts together, a stationary base, a pressure-receiving work support fixed thereon and having a work face, a stationary heater spaced from the work support, a pressure-applying member, a device movably mounting said member on said base so that said member may be the work carried thereby may be shifted readily into the position shown, where the work is clamped between members 5 and Ill, or to a position in which cushion 5, or work laid loosely thereon, is .fully exposed to the direct rays of heat'from the lamp.

Substantial moisture in the air constitutes a difficult problem in cementing leather because the fast in general use collects moisture from the air and deteriorates the cement and slows up its drying action. The present structure quickly evaporates the moisture in the air surrounding the work and eliminates the above-mentioned By mounting work on the last I8 and applying ,a first coat of cement to such work, this cement may be quickly and adding the second coat the press.

thoroughly dried before and placing the work in Obviously the simultaneously heating of the last and cushion provides for application of heat to the cement from both layers of the work and this is effected by use of a'single heating unit. When a welt shoe is being cemerited, the heat is applied to both sides and to the edge of the welt, a result which cannot be obtained when the cushions or lasts have heaters imbedded within them or. when the work When the lamp is. .tu rned off, the parts which have been receiving the most intense heat, be-

ing exposed to the air, cool rapidly, which is ,most desirable for setting or hardening the ocment, and the work may be left under pressure until sufficiently cool for the cement to harden whereas, with the imbedded heating element or other means applying heat through the cushion or last, the most intensely heated parts will con-=.

tinue to radiate heat and the cooling operation will be slower. Hence, because of time limitations, the work is often removed from the press before the cement is hardened and the bond is weakened accordingly.

-In some installations the cushions and lasts .may be preheated in suitable ovens, in which case the use of lamp l5 will serve to maintain the temperature of-the preheated parts for a substantial length of time and,

drying nature of nitrocellulose cements face shifted to one position between the work face and the heater and to another position providing an unobstructed space between the work and the heater, and means mounted on said base for moving said device to thrust the pressure-applying member towards the work support to clamp work between them.

2. In an apparatus for cementing soles and other parts to shoes, a work support including a cushion having a work face,-a heater positioned opposite to but spaced from said cushion face,a device movably mounted on said support and extending away therefrom, a last carried on-said device and movable thereby to a position between the cushion and the heater in which position a substantial area of said cushion face is shielded by the last and a shoe thereon from direct radiation of heat from the heater, and alsomovable -to a position exposing substantially the entire area, of said cushion face to direct radiation of heat from the heater, and means associated with said device for drawing the last and work thereon against said cushion face when the last is in the first-mentioned position.

3. In an apparatus for cementing soles and other parts to shoes, a work support including a work face, a radiant heater in a position 0pposing but spaced from said face, a last movable manually into a position between theheater .and said face while the latter is exposed to direct radiation of heat from the heater, in which posi- .tion a substantial area of said face is shielded by the last and a shoe thereon from direct radiation. of heat from the heater, said last being movable manually to another position which leaves substantially the entire area of said .face exposed to direct radiation of heat from .the heater, and manually operable means associated with the last for drawing the same, and a shoe thereon, against said face when the last is in the first-mentioned position.

4. In an apparatus for cementing leather-like parts together, a stationary base, a work sup- Lport'fixed thereon and having a work face, a heater positioned opposite to but spacedfrom said face and arranged to radiate heat directly toward said face, a pressure-applying member -movably mounted on said base and shiftable .manually into a position above said face in .which the member and work associated therewith will interrupt a substantial portion of the heatrays radiated from the heater toward said face, said member being shiftable manually into another position in which the space between the heater and the work face is unobstructed and said face is readily accessible to an operator using the apparatus, and means mounted :on said base and operable manually for thrusting said member towards the work face when .said member has been moved into the first- .mentioned' position and thereby clamping the work between the member and the work face.

CULLEN L. HUNTOON.

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