Photocopying – Projection printing and copying cameras – With temperature or foreign particle control
Patent
1986-07-11
1987-11-17
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
With temperature or foreign particle control
355 84, 355113, G03B 2752
Patent
active
047071168
ABSTRACT:
The exposure device is especially intended for use with the contact print of circuit patterns on printed circuit boards, and is composed of a tubular light source extending with the length thereof throughout the exposure field width and disposed in a housing light-permeable over the exposure field, with the light source being disposed within a reflector open toward the exposure field and a light-directing grid covered by the side flanks of the reflector being located underneath the light source, and a heat insulating plate being provided underneath the light directing grid.
An occulting strip (5) is disposed between the light source (1) movable across the exposure field and the light directing grid (4), and the reflector (3) is provided with an air exhausting slit (6) extending throughout the entire length thereof, with the housing (8) provided with at least one air inlet port (7) and enclosing the reflector forming the outer part of a ventilation channel guided about the reflector (3) and guided through the reflector.
REFERENCES:
patent: 2269794 (1942-01-01), Stechbart
patent: 2344558 (1944-03-01), Moore
patent: 3033980 (1962-05-01), Pickering et al.
patent: 3157362 (1964-11-01), Waly
patent: 3936686 (1976-02-01), Moore
patent: 3986018 (1976-10-01), Ishii
patent: 4293899 (1981-10-01), Sanner
patent: 4630182 (1986-12-01), Moroi et al.
Kiessling Michael
Newiger Winfried
Rach Harry
Walch Wolfgang
Hayes Monroe H.
Kelman Kurt
Klimsch & Co. KG
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