Photocopying – Projection printing and copying cameras – With temperature or foreign particle control
Patent
1989-04-27
1990-07-24
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
With temperature or foreign particle control
355 27, 355 35, 355 77, G03B 2752
Patent
active
049438271
ABSTRACT:
A method and apparatus form visible images in an imaging media which exhibits variation in sensitivity and color balance as a function of temperature and humidity changes. The media includes a substrate having provided on one of its surfaces a layer of microcapsules containing an image forming agent and a photohardenable composition. In the apparatus, a radiation source provides one or more bands of actinic radiation for exposing the substrate. An optical system focuses the actinic radiation onto the substrate to form a latent image thereon. A developing device develops the latent image into a visible image onto the substrate or onto a receiver substrate. A temperature and/or humidity sensor is provided for sensing the temperature and/or humidity exposure environment prior to exposure. An exposure control responsive to the sensors(s) controls the duration of the exposure at least partially as a function of temperature and/or humidity.
REFERENCES:
patent: 4853743 (1989-08-01), Nagumo et al.
patent: 4864356 (1989-09-01), Asano et al.
Good William G.
Holycross Mark E.
Boshinski Thomas A.
The Mead Corporation
Wintercorn Richard A.
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