Photocopying – Contact printing – Fluid pressure retention of carrier and receiver in exposure...
Patent
1980-03-03
1982-03-30
Wintercorn, Richard A.
Photocopying
Contact printing
Fluid pressure retention of carrier and receiver in exposure...
355 23, 355 95, G03B 2720
Patent
active
043221610
ABSTRACT:
An open face vacuum light table with an associated overhead high intensity light source is provided with a movable, preferrably pivotable, framer structure capable of overlying either of two table surface areas, at least one of which is provided with an apparatus, for example a vacuum grid, for drawing lithographic work pieces into close contact for light induced image recordation on film or other light sensitive receiver. The frame may carry a clear sheet of stripping base material that also serves as the vacuum completing face of the vacuum grid. The table is provided with stripping pin grooves about the perimeter of the entire table, an entire sub-area, partially around the table or a sub-area. Apparatus for maintaining one face of the pivoted frame in coplanar relationship with either of the table areas over which the frame is located may include an elevator mechanism associated with one or both table areas or an eccentric pivot between the frame and table. Digital positioning apparatus along one or two coordinate axes associated with one or both table areas provides a digital indication of work piece location and may relocate work pieces by digitally selected location indicia. The method of operation includes temporarily attaching preliminary work pieces to the common base material while over a first side of the table; attaching the light sensitive receiver over the second side of the table that includes a vacuum grid, pivoting the frame and base material over the second side of the table; applying a vacuum to the vacuum grid, utilizing the base material to complete the vacuum; and exposing the receiver to light passing through the preliminary work pieces.
REFERENCES:
patent: 1919735 (1933-07-01), Lane
patent: 3147683 (1964-09-01), Hulen
patent: 3176601 (1965-04-01), Bradley
patent: 3381573 (1968-05-01), Caldwell
patent: 3475094 (1969-10-01), Kucera et al.
patent: 3545860 (1970-12-01), Hutchins
patent: 3588079 (1971-06-01), Addy et al.
patent: 3625610 (1971-12-01), Raymond
patent: 3635560 (1972-01-01), Hulen
patent: 3762815 (1973-10-01), Friedel
patent: 3797932 (1974-03-01), Endter et al.
patent: 4006984 (1977-02-01), Friese
Rost Kyle W.
Wintercorn Richard A.
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