Illumination lamp assembly for a document scan system

Details Illumination lamp assembly for a document scan system Illumination lamp assembly for a document scan system

1986-05-21

1987-10-13

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3R, 313113, G03G 1500

Patent

active

046994971

ABSTRACT:
An illumination lamp assembly is provided for scan/illuminating a document during a document scan mode. The assembly includes an elongated lamp partially enclosed by a pair of elliptical reflectors. The lamp ends are centered at the focal point of the two reflectors and the lamp is releaseably secured between fixed end blocks and a retaining bias means arrangement which centers lamp at the reflector focal point and permits adjustment-free removal and replacement. Vibrational strobing of the lamp is decreased by providing at least one elastomeric O-ring around the lamp circumference to increase the lamp stiffness and raise the natural frequency of the lamp into a range where the resonant effects of the strobing are reduced.

REFERENCES:
patent: 1822980 (1931-09-01), Palmer
patent: 2183647 (1939-12-01), Holden
patent: 3788560 (1974-01-01), Hough et al.
patent: 3998539 (1976-12-01), Kidd
patent: 4226527 (1980-10-01), Lama et al.
patent: 4357649 (1982-11-01), LaCroix
patent: 4634261 (1987-01-01), Nagoshi
patent: 4636063 (1987-01-01), Takai et al.

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