Molded plastic toe cap

Details Molded plastic toe cap Molded plastic toe cap

1993-05-18

1994-07-26

Sewell, Paul T.

Boots, shoes, and leggings

Toe caps and tips

36 77M, 36 72R, A 3C 1314

Patent

active

053317513

ABSTRACT:
A toe cap for a protective shoe is injection molded utilizing a fiber-filled plastic resin having a high loading of relatively long fibers. A preferred material is glass-filled polyurethane having fibers predominantly of a length in the range of 0.25 inch (6 mm) and 1 inch (25 mm). The resin injection gate is positioned to provide injection of the fiber-filled plastic material directly adjacent the rear edge of the toe cap, preferably between the roof of the cap and the lower edge of one wall. The gate has a minimum dimension of 0.100 inch (2.5 mm). The gate location and size results in a lateral orientation of the fibers in the injected plastic material across the roof of the toe cap to substantially enhance the strength thereof.

REFERENCES:
patent: 3950865 (1976-04-01), Gray
patent: 4735003 (1988-04-01), Dykeman
patent: 5210963 (1993-05-01), Harwood

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