Ultraviolet irradiating apparatus

Details Ultraviolet irradiating apparatus Ultraviolet irradiating apparatus

1975-10-20

1977-03-08

Smith, Alfred E.

Radiant energy

Irradiation of objects or material

Irradiation of semiconductor devices

250504, 250453, H01J 3720

Patent

active

040114562

ABSTRACT:
Ultraviolet irradiating apparatus including a generally enclosed upright cylindrical housing defining an entry opening and an exit opening, a linear ultraviolet radiation source vertically mounted generally along the central axis of the housing, multiple sections of reflectors formed with zig-zag configurations disposed around the cylindrical interior wall of the housing to a height about the same as the radiation source with the corners of the angles between the zig-zag reflectors disposed generally transversely to the length of the radiation source. The reflectors present specular surfaces to the radiation source which reflect about 80% of the original ultraviolet rays from the radiation source. The reflectors preferably may be formed from specular aluminum sheet. A parts conveyor is mounted to convey parts into the entry opening, then through a generally circular horizontal path between the radiation source and the reflectors and out through the exit opening. The described zig-zag reflectors cause the parts carried by the conveyor to be subjected to a greater and more concentrated exposure to ultraviolet radiation which is more evenly distributed to all exposed surfaces of the parts. An opaque baffle may be mounted as the partition between the entry and exit openings and extending vertically and radially from near the radiation source at least to the exterior of the wall of the housing.

REFERENCES:
patent: 2423884 (1947-07-01), Glass
patent: 2645709 (1953-07-01), Thorstensen
patent: 3530294 (1970-09-01), Rogers
patent: 3790801 (1974-02-01), Coleman

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