Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-02-28
1990-05-22
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156233, 156235, 156239, 156241, 156497, 156538, 156580, 1565831, B29D 900, H01H 1100, B32B 3104
Patent
active
049274791
ABSTRACT:
The plant comprises a first vacuum plate with openings on which a sheet may be fixed in an exact planar way by suction. A second plate with a slightly arcuated surface and turned towards the first plate is adjustable in height by two compressing cylinders and is pivotingly fixed to the structure. The second plate is also a vacuum plate and may be unrolled on the first plate. During the unrolling motion, the second plate is conducted by means of retractable bolts which are engaged into corresponding openings of the first plate. To compress two sheets, a first sheet is fixed in an exact planar way to the first plate by suction and transferred by an unrolling motion of the second plate thereon, the suction force of the plate being reduced and that of the second plate being correspondingly increased. A second sheet is then fixed to the first plate and cold- or hot-compressed according to the same unrolling process as the first sheet. The plant is particularly appropriate for fabricating sheets or membrane keyboards.
REFERENCES:
patent: 1891931 (1932-12-01), Hornig
patent: 2596253 (1952-05-01), Kurkjian
patent: 3204817 (1965-09-01), Kostering
patent: 3873395 (1975-03-01), Ehrlich
patent: 3962026 (1976-06-01), Lottridge
patent: 4234373 (1980-11-01), Reavill et al.
patent: 4273738 (1981-06-01), Spengler
patent: 4317011 (1982-12-01), Mazurk
patent: 4407692 (1983-10-01), Torbeck
patent: 4505771 (1985-03-01), George
patent: 4541886 (1985-09-01), Marlow et al.
Mayborg et al., Method of Forming a Curved Membrane Assembly Having a Concave Top, 9/84, pp. 1915-1916.
Aftergut Jeff H.
Ball Michael W.
Kaplan Blum
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