Photocopying – Projection printing and copying cameras – Step and repeat
Patent
1987-08-18
1988-12-13
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Step and repeat
G03B 2758
Patent
active
047914580
ABSTRACT:
A multi-purpose ultra-violet exposure frame used to prepare a photomask for the imaging of Printed Wired Boards and used as a production tool with UV exposing machine, for manufacture of multiple or single imaged PWB on a single panel of dielectric base material. The apparatus includes movable pins for transport of a panel to, and between, photomasks which are clamped for manual operation, on the same side of the pins' travel; a fixed spring-loaded pin, acting as an indexer to insure the stepping of the image; photomask clamps which, exercising pressure on a perforated metallic strip, hold the photomask rigidly and allows repetition of the lot, and the punching out of holes in the photomask for the insertion of locating pins; and spring-loaded glass insuring air-tight exposure of the photomask onto a pre-sensitized panel to be imaged. The apparaatus and method of pinning panels from the top surface down to insure stability in transporting them, permits accurate and automatic registration of a photomask onto a pre-drilled panel and allows a set of air suction cup-shaped members to remove a protective foil from the light-sensitive, exposed surface of the panel.
REFERENCES:
patent: 4093378 (1978-06-01), Horr et al.
patent: 4155642 (1979-05-01), Lacombat
patent: 4189230 (1980-02-01), Zasio
patent: 4358198 (1982-11-01), Moriyama et al.
patent: 4448518 (1984-05-01), Nishida et al.
Griffin Donald A.
Koch Robert J.
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