Photocopying – Contact printing – Fluid pressure retention of carrier and receiver in exposure...
Patent
1986-08-01
1987-06-02
Hayes, Monroe H.
Photocopying
Contact printing
Fluid pressure retention of carrier and receiver in exposure...
355 87, 430 5, 430 23, 430327, G03B 2720
Patent
active
046698710
ABSTRACT:
A method and apparatus for exposing a layer of photoresist on a sheet includes positioning the sheet in a vacuum printing frame comprising a glass photographic printing plate carrying an opaque master pattern of metal or metal oxide on a central area of the printing plate. A light transmissive rubbery material is patterned in such a fashion as to overlie the opaque portions of the master pattern and provide a continuous path between the islands overlying the opaque master pattern. The rubbery material also extends in the peripheral area of the photographic printing plate and a plurality of mesas separated by channels are formed in this peripheral area. The channels have a width substantially greater than the path width formed between adjacent islands of rubbery material overlying the opaque portions of the pattern. The peripheral channels facilitate the evacuation of the plate and reduce evacuation time. The mesas of rubbery material in the peripheral area of the plate through which the channels are formed act as supports to space the printing plate from the resist coating on the metal sheet so that evacuation of the space between the printing plate and the sheet can be achieved without having the printing plate either be sealed-off by the metal sheet or by a second printing plate which is located on the opposite side of the metal sheet.
REFERENCES:
patent: 3199430 (1965-08-01), Brown
patent: 3313225 (1967-04-01), Mears
patent: 3615468 (1971-10-01), Tiala
patent: 3751250 (1973-08-01), Moscony et al.
patent: 3897251 (1975-07-01), Detrick et al.
patent: 4061529 (1977-12-01), Goldman et al.
patent: 4588676 (1986-05-01), Moscony et al.
Deibler Dean T.
Michielutti Thomas J.
Moscony John J.
Wetzel Charles M.
Coughlin Jr. Vincent J.
Hayes Monroe H.
Irlbeck Dennis H.
RCA Corporation
Whitacre Eugene M.
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