Apparatus for permeating irradiated light

Photocopying – Projection printing and copying cameras – With temperature or foreign particle control

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355 67, 359253, 359272, 313 12, 313 22, 362 16, 362 96, 362373, G03B 2754

Patent

active

051683024

ABSTRACT:
A light permeating apparatus preferably employable for an exposing equipment, a drying equipment, a printing equipment for forming a pattern on a printed circuit board is disclosed. The apparatus includes an opposing pair of light permeable plates, a casing fixedly secured to the light permeable plates, a filter disposed in the inclined state in the flat space defined between the light permeable plates to divide the interior of the flat space into two parts, a liquid supply tube attached to the fore end of the casing and liquid discharge tubes attached to the rear end of the casing. The opposite sides and the rear side of the casing are designed in the flow passage-shaped configuration, and a plurality of holes are formed on the inner wall of each of the flow passages on the opposite sides and the rear side of the casing. A material employable for the light permeable plates and a material employable for the filter are properly selected so as to selectively absorb undesirable wavelength components in an irradiated light. A bubble disintegrating unit is disposed at the intermediate position in the liquid supply tube or on the inlet side of the casing.

REFERENCES:
patent: 3914010 (1975-10-01), Zeller
patent: 4000407 (1976-12-01), Keller et al.
patent: 4431257 (1984-02-01), Born
patent: 5032021 (1991-07-01), Kanatani et al.

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