US2413750A - Pad cover - Google Patents

Description

Jan. 7, 1947.

E. R. DAVIS PAD COVER File d May 23, 1944 /72 van tor v Patented Jan. 7, 1947 NITED STATE: PATENT OFFICE Shoe Machinery Corporation,

Flemington,

NPJL, a corporation of New Jersey Application May 23, 1944, Serial No. 536,869

4 Claims.

This invention relates to machines for pressing soles on shoe bottoms and particularly to pad covers for the pads of such machines.

Machines for this work, particularly cement sole attaching machines, have yielding pads which it is desirable to protect from wear by providing covers therefor. The cover should be resilient so that it will immediately recover its original shape when pressure of the shoe is relieved so as not to interfere with the action of gages movable over the surface of the cover to engage the edge face of the sole. The cover is to protect the pad from wear and hence should be as durable as possible. To preserve the character of the shoe bottom, the cover should have a very smooth sole-engaging surface. The cover should be-waterproof since soles when attached are usually in temper. The cover should also be unaffected by the cements used in sole attaching or the solvent employed for activating the cemerits.

Objects of this invention are to provide a pad ins include highly polymerized and plasticized vinyl chloride (Koroseal) and various copolymers of vinyl chloride and vinyl acetate (known as Vinylite") In order to resist without cracking the continual bending and distortion to which a pad cover is subjected in use, such resins must be highly plasticized and, when so plasticized, their recovery after distortion is relatively slow so that under some conditions a cover entirely of plasticized vinyl resin is not entirely satisfactory.

I have found that a pad cover consisting of a lower layer of leather and an upper layer of synthetic'resin, preferably with the layers cemented to each other throughout then-engaging surfaces, possesses all the characteristics desired in a pad cover. The leather promptly resumes substantially its original shape after distortion and therefore causes prompt return of the synthetic resin surface also. The leather is protected by the synthetic resin layer from water which may be squeezed out of the sole under pressure and from accidental contact with the cement or cement solvents which might otherwise be absorbed by the leather and adversely affect its action as a pad cover.

The drawing is a perspective view' of a pad cover embodying the present invention.

In the drawing, the numeral Hi represents a lower layer which may be of any kind of material, for example leather, having the property of promptly recovering substantially its original shape after distortion or, if desired, the kinds of leather usually employed for pad covers such as horsehide and pigskin may be used. The upper surface of the leather I0 is covered with a thin layer l2 made from a smooth sheet of one of the synthetic resins above mentioned such as Koroseal or Vinylite. As above suggested, the leather layer, since it is not subject to abrasion, need not be of the relatively expensive horsehide or pigskin frequently used as pad covers but may be of the cheaper grades of leather or other material provided they have suiiicient resiliency promptly to recover their shape after distortion.

The layers I0 and I2 are preferably cemented together throughout their opposed surfaces, any suitable cement, such as that disclosed in United States Letters Patent No. 2.323.562, granted July 61943, in the name of F. V. Nugent, being employed.

The cover may be used, for example, on a pad such as that disclosed in Letters Patent of the United States No. 2,205,400, granted June 25, 1940, upon an application of Sidney J. Finn, and for'that reason is shown as provided with a loeating stud it which may be a cylindrical shell filled with rubber, the shell having attaching projections I6 which are preferably embedded in the plastic layer 12, the cylindrical portion ex tending through a hole in the leather layer l0.

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

1. In a sole-attaching press having a pad for pressing a shoe sole, a cover for said pad comprising a layer of leather and a layer of polymerized synthetic vinyl resin on its exposed face.

2. In a sole-attaching press having a pad for pressing a shoe sole, a cover for said pad com- I prising a layer of leather and a layer of Vinylite on the outer face of the cover.

3. In a sole-attaching press having a pad for EMERY R. DAVIS.

Images