Step tread plate

Details Step tread plate Step tread plate

1980-02-29

1981-09-15

Thibodeau, Paul J.

Stock material or miscellaneous articles

Sheets or webs edge spliced or joined

52177, 52588, 105457, 280169, 428143, 428174, 428192, 428354, 428212, B32B 300, B61D 3200

Patent

active

042898196

ABSTRACT:
The tread plate comprises a substantially flat, elongated metal portion coated on its upper side with a layer of resilient, dark-colored, plastic material through which gritty material is dispersed substantially uniformly throughout its thickness. The first portion has at its outer longitudinal edge a plurality of grooves which are engaged by complementary tongues formed in the longitudinal edge of a second portion whose cross-section is essentially L-shaped. The second portion is also coated with a somewhat resilient plastic material through which gritty particles are distributed. This layer has a color which is substantially lighter (or brighter) than the substantially darker color of the layer on the first portion thereby reflecting substantially more light than said first portion.

REFERENCES:
patent: 606532 (1898-06-01), Furnoss
patent: 1578491 (1926-03-01), Welcome
patent: 1812504 (1931-06-01), Del Turco
patent: 3421274 (1969-01-01), Balzer et al.

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