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US 4,284,275 AGranted
Polyurethane gripping material
OwnerHerbert E. Fletcherinventor
Life of this patent
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Abstract
A polyurethane gripping material for hand held implements. The material is an adhesive backed polyurethane sheet which includes a plurality of small pores on the surface of the sheet. The pores are formed by sprinkling salt on the surface of the sheet while it is in a softened state. The sheet is then cured and sanded down to expose and remove some of the salt granules. Many small pores are exposed by the removal of the salt. The pores act as suction cups to increase the performance of the grip.
Claims7
A method of producing a sheet of flexible resin gripping material having a plurality of pores in the surface thereof comprising the steps of:
- a. forming a sheet of hardenable resin material;
- b. sprinkling said sheet while it is in a softened state with a granular substance of the general size and configuration of ordinary table salt;
- c. allowing said sheet to harden;
- d. removing a portion of the upper surface of said sheet, thereby exposing some of said granules and forming a smooth upper surface;
- e. removing said exposed granules, thereby forming a plurality of pores in the surface of said sheet, wherein said pores are of the general size and configuration of ordinary table salt so as to act as suction devices when in contact with skin.
2 more elements
Dependencies are inferred from the claim text.