Method for closure heating

Details Method for closure heating Method for closure heating

1989-08-04

1991-01-01

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

219 1055A, 219 1055M, 264268, 264310, 264DIG46, 4251748R, B29C 3512

Patent

active

049816276

ABSTRACT:
A method and appaatus for curing a gasket material on a cap, the apparatus having a microwave transmitter, associated wavegide and a device for moving multiple caps through the waveguide. A plastic material is applied to the cap so as to form a gasket. The cap is then moved through the waveguide where microwave energy is absorbed by plastic material. The plastic material then heats from room temperature to a predetermined curing temperature in the waveguide. The cap is then removed and allowed to cool back to room temperature so that the gasket material will harden.

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patent: 4577078 (1986-03-01), Noda et al.
patent: 4675139 (1987-06-01), Kehe et al.
patent: 4731513 (1988-03-01), Collette

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