Photocopying – Contact printing – With scanning
Patent
1982-05-07
1983-12-13
Hayes, Monroe H.
Photocopying
Contact printing
With scanning
355 52, G03B 2710
Patent
active
044202490
ABSTRACT:
An improved image reproportioning system is of the type for reproducing an image from an image bearing sheet onto a photosensitive sheet so that the scale of one dimension of the reproduced image can be changed relative to its other dimension. The system comprises a first sheet supporting member for supporting one of the sheets, and a second sheet supporting member for supporting the other of the sheets in substantial juxtaposition with the first sheet. The system also includes means for defining a slit of light, and means for moving the first and second sheet supporting members at a substantially constant speed in a first direction parallel to the direction of the one dimension and transverse to the slit of light so that the sheets pass through and are exposed by the slit of light. Means are also provided for moving the first and second sheet supporting members relative to one another at a substantially constant relative speed as the sheets are exposed to the slit of light. The relative speed is a function of the percentage of change of the scale of the one dimension. The means for moving the first and second sheet supporting members relative to one another includes (a) means for spring biasing the first and second members so that the second member is biased to move relative to the first member in a direction parallel to the first direction; (b) ramp means; (c) means for adjusting the angle of inclination or declination of the ramp means in the first direction; and (d) cam arm means (1) pivotally mounted to and adapted to move with the first sheet member, and (2) cooperative with the ramp means so as to move the second member relative to the first member at a constant linear speed against the bias means as the first and second members move at the substantially constant speed.
REFERENCES:
patent: 3374724 (1968-03-01), Torres
patent: 3445165 (1969-05-01), Dubbs
patent: 3767301 (1973-10-01), Solo
patent: 3992094 (1976-11-01), Adcock
patent: 4008959 (1977-02-01), Parsons
patent: 4238156 (1980-12-01), Parsons
Hayes Monroe H.
Nashua Control Instruments, Inc.
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