Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1975-06-26
1976-09-07
Kucia, Richard R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264166, 264219, 264293, 264322, B29D 2700
Patent
active
039794890
ABSTRACT:
A method of making a carpet underlay is provided wherein the underlay is comprised of a sponge rubber body having a load-carrying surface defined by a plurality of cooperating closed-area coplanar portions which define the major part of the area of a plan view of such body.
REFERENCES:
patent: 2180304 (1939-11-01), Minor
patent: 3455772 (1969-07-01), Mason
Colonial Rubber Works, Inc.
Kucia Richard R.
Wolk Reuben
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