Optical scanning carriage

Details Optical scanning carriage Optical scanning carriage

1980-06-02

1982-06-01

Truhe, J. V.

Photocopying

Including fiber optics

188289, 267 8A, G03G 1528, F16F 948

Patent

active

043324606

ABSTRACT:
An optical scanning carriage which scans a document and is rapidly returned to the start of scan position is provided with a continuously working positive deceleration device. The device provides a triple mode of operation wherein in the first mode of operation a first maximum flyback velocity is achieved, in a second mode of operation a deceleration profile is achieved and in a final mode of operation a minimum constant velocity of the scanning carriage is achieved. Typically a spring builds up stored energy during the scan cycle which is released through a dashpot having a tapered metering pin connected to a piston forced in motion by the spring which progressively closes off an orifice in the end of a cylinder when the carriage is returned to the start of scan position.

REFERENCES:
patent: 1957308 (1934-05-01), Anderson
patent: 2553810 (1951-05-01), Carlson
patent: 3378878 (1968-04-01), Flint et al.
patent: 3918806 (1975-11-01), Cook
patent: 3960250 (1976-06-01), Wiater
patent: 3990687 (1976-11-01), Curnutt
patent: 4033691 (1977-07-01), Bierworth et al.

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