Braked gravity transport for laser reading and writing systems

Details Braked gravity transport for laser reading and writing systems Braked gravity transport for laser reading and writing systems

1983-11-14

1985-03-19

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

346 76L, 355 53, G03B 2732, H04N 584

Patent

active

045055785

ABSTRACT:
A transport for a laser writing and reading system in which a carriage is propelled by a falling mass, either its own or an auxiliary mass. The falling mass works against a hydraulic cylinder and piston in which hydraulic fluid is displaced from the cylinder. A valve limits the flow of hydraulic fluid out of the cylinder so that the fall of the mass, and hence the carriage is braked to a uniform velocity. The system also includes a laser having a beam for scanning in a line transverse to the direction of motion of the carriage. A photosensitive medium is disposed to receive the scanning radiation. Either the laser or the photosensitive medium may be mounted on the carriage, with the other mounted in the fixed position in optical communication therewith. By controlling the rate of fluid flow through the valve, the mass will fall with uniform velocity, thereby propelling the carriage at a uniform, vibration-free rate.

REFERENCES:
patent: 3620623 (1971-11-01), Reams et al.
patent: 3797935 (1974-03-01), Marcy
patent: 3999010 (1976-12-01), Oosaka et al.
patent: 4225224 (1980-09-01), Balasubramanian
patent: 4285012 (1981-08-01), Ohara et al.
patent: 4358198 (1982-11-01), Moriyama et al.

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