Method of molding a foamed mattress having a crown area with cor

Details Method of molding a foamed mattress having a crown area with cor Method of molding a foamed mattress having a crown area with cor

1977-11-07

1979-04-10

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 451, 264293, 264331, B29D 2704

Patent

active

041488555

ABSTRACT:
A process for casting a foamed mattress having a crown area with cored-out areas therein to modify the harshness of feel of said mattress. A mold cavity having gates therein to give the cored-out pattern in the crown of the mattress is provided and a liquid foamable urethane resin reaction mixture is deposited and distributed in a fan-shaped arc in the cavity from preferably two or more distributing beads in response to the relative movement of the depositing and distributing means to that of the mold. The deposited mixture is then permitted to foam in order to fill the mold and to their cure prior to removing the product from the mold cavity.

REFERENCES:
patent: 2145731 (1939-01-01), Minor
patent: 2785739 (1957-03-01), McGregor et al.
patent: 3393259 (1968-07-01), Trogdon
patent: 3927162 (1975-12-01), Stalter
patent: 4073839 (1978-02-01), Burkholder et al.

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