Method of manufacturing a randomly patterned floor covering from

Details Method of manufacturing a randomly patterned floor covering from Method of manufacturing a randomly patterned floor covering from

1990-11-28

1992-10-13

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Surface finishing

264 77, 264145, 264157, 264175, 264293, 264325, 264245, 264347, 264139, B29C 4320

Patent

active

051548682

ABSTRACT:
A method of manufacturing a randomly patterned floor covering having contrastingly-colored zones from a preform of rubber in which the preform is cut in pieces, each of which are molded into a blank having projections extending from a top side of the blank in relief-like fashion, solidified by vulcanization and then machined by cutting only in the region of the projections. The rubber forming the contrastingly-colored zones is mixed with contrastingly-colored particles in an amount of at least ten percent by weight. These particles are substantially free of flat surfaces and are in, at least, an advanced state of vulcanization. The particles located in the projections extending from the top side of the blank are exposed during the cutting step.

REFERENCES:
patent: 1486208 (1924-03-01), Weber
patent: 1634955 (1927-07-01), Mell
patent: 1816822 (1931-08-01), Bell
patent: 1830141 (1931-11-01), Stone
patent: 2244565 (1941-06-01), Nast
patent: 2915785 (1959-12-01), Valentini
patent: 3383442 (1968-05-01), Mountain
patent: 4076567 (1978-02-01), Yoshikawa et al.

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