Process for molding a frame onto a seat outfit for the purpose o

Details Process for molding a frame onto a seat outfit for the purpose o Process for molding a frame onto a seat outfit for the purpose o

1990-09-13

1992-05-26

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Extrusion molding

264 467, 264252, 2642711, B29C 6722

Patent

active

051165562

ABSTRACT:
A process for producing a seat element from a portion of an outfit (1) including a relatively compact plastic covering layer, a network formed by a continuous sheet of metal springs (5), the intermingled turns of which, on one side, come substantially flush against the lower face of the covering (1), and an intermediate connecting layer (3) made of a plastic foam which partially encases the turns of the sheet of springs (5).
According to the invention, the peripheral edge (7) of the said outfit portion is gripped in an injection mold (11), this mold having a cavity (9) into which the said edge (7) penetrates, a thermoplastic to which an expanding agent has been added is injected into the said cavity at low pressure, and this thermoplastic is allowed to harden there.

REFERENCES:
patent: Re24914 (1960-12-01), Koenigsberg
patent: 2785440 (1957-03-01), Toulmin, Jr.
patent: 3116196 (1963-12-01), Terry
patent: 3855653 (1974-12-01), Stalter, Sr.
patent: 4106139 (1978-08-01), Southard
patent: 4154786 (1979-05-01), Plasse
patent: 4311541 (1982-01-01), Fultz
patent: 4423102 (1983-12-01), Danton
patent: 4492663 (1985-01-01), Reinfeld et al.
patent: 4640150 (1987-02-01), Kobayashi et al.
patent: 4795517 (1989-01-01), Elliot et al.
patent: 5000983 (1991-03-01), West et al.

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