Hot press with pressure vessels to uniformly distribute pressure

Details Hot press with pressure vessels to uniformly distribute pressure Hot press with pressure vessels to uniformly distribute pressure

1994-12-20

1996-09-24

Gerrity, Stephen F.

Presses

Automatic or material triggered control

Of actuating means

100 90, 100 93P, 100211, 156358, 156382, 1565833, 4254051, 425407, B30B 1534, B30B 502

Patent

active

055580157

ABSTRACT:
A hot press used, for example, for producing a thin printed board and a multilayered board, such as liquid crystal glass board bonded by a low-viscosity adhesive, and to a hot press suitable for forming a board requiring uniform bonding pressure. A hot press includes an upper and a lower bolster arranged in vertically opposed relation to each other, an upper and a lower heat plate respectively disposed in opposed relation to the upper and lower bolsters, a device for moving at least one of the upper and lower bolsters toward the other to produce a pressing force between the upper and lower heat plates, and pressure vessels respectively mounted on the heat plates. Each pressure vessel is made of a thin film and is filled with a fluid heating medium. When substrate blanks are interposed between the upper and lower pressure vessels and pressed by them, surface pressure for adhesive bonding becomes uniform, and heat from the heat plates is uniformly transferred to the blanks.

REFERENCES:
patent: 1806861 (1931-05-01), Owen
patent: 1878899 (1932-09-01), Sherts
patent: 2172002 (1939-09-01), Stanley
patent: 2431943 (1947-12-01), Land et al.
patent: 2646105 (1953-07-01), Langer
patent: 3964958 (1976-06-01), Johnston
patent: 4734155 (1988-03-01), Tsunoda et al.
patent: 5297480 (1994-03-01), Miyashita et al.

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