Heater assembly and method of forming same

Details Heater assembly and method of forming same Heater assembly and method of forming same

1978-09-05

1981-10-13

Gallagher, John J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

29611, 156298, 156299, 156330, 219457, 219464, 428 67, 428 78, 428325, 428417, 428418, B29C 1900, B32B 3100

Patent

active

042946433

ABSTRACT:
Laminated heater plate assembly is formed from a plurality of layers of glass cloth and/or glass mat and epoxy resin which are laminated together under heat and pressure. One or more thermally conductive heater members are mounted in a cut-out region(s) in a pre-cured or "C" stage laminate top portion of the assembly while a plurality of uncured or "B" stage glass mat and epoxy resin laminations are stacked, assembled under the "C" stage portion and heater portion(s), and bonded to each other into a rigid, warp-free heater plate assembly which can be repeatedly subjected to steam or hot water without damage. Preferably, the resin density after bonding in the region of the edges of the heater portion(s) and the adjacent surrounding edges of the cut-out region(s) is greater than in locations spaced further from the heater portion(s) in order to enhance the sealing of the assembly in the most critical areas thereof. In a preferred embodiment the weight of the assembly is reduced by the use of micro-balloons in some laminations, the absence of epoxy in others, and by the elimination of portions of the interior layers.

REFERENCES:
patent: 2496911 (1950-02-01), Green
patent: 2952761 (1960-09-01), Smith-Johannsen
patent: 3436816 (1969-04-01), Lemelson
patent: 3769126 (1973-10-01), Kolek
patent: 3923581 (1975-12-01), Payne et al.
patent: 3996092 (1976-12-01), Sarazin et al.

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