Defoaming electronic hardware

Details Defoaming electronic hardware Defoaming electronic hardware

1981-06-15

1983-11-08

Rosenbaum, Mark

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

29829, 2940203, 2940206, 2940208, 174 52PE, H05K 116, H05K 300

Patent

active

044146060

ABSTRACT:
Printed wiring board assemblies (12) and the like encapsulated in foam (28) may be removed by use of a pair of sandwich structures (30) placed about the assembly. Each sandwich structure includes a pair of perforated sheets (36) with a sinuously extending filament (40) sandwiched between the sheets. Defoaming is effected by pulling the filament from the foam through the intermediary of a tool grasping ends (52) of the filament.

REFERENCES:
patent: 3616533 (1971-11-01), Heap et al.
patent: 3641725 (1972-02-01), Grisell
patent: 3869563 (1975-03-01), Ocken, Jr.
patent: 3952082 (1976-04-01), Arnaud
A removable Encapsulant-Polystyrene Foam by K. B. Wischmann et al., SAMPE Journal, Mar./Apr., 1977, pp. 15-19.

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