Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1988-04-15
1990-06-12
Reynolds, Bruce A.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346110R, 346108, 346107R, 346 76L, 355 20, 355 18, 355302, G01D 900, G01D 942, G03B 2700
Patent
active
049336851
ABSTRACT:
A method and an apparatus of exposing a photosensitive medium for forming thereon a latent image which corresponds to an original image to be reproduced and which is developed into a visible image. The photosensitive medium has a basic minimum amount of exposure to a radiation, below which a density of the visible image remains constant and above which the density varies with an amount of exposure to the radiation. An entire recording surface of the photosensitive medium is evenly exposed to a first radiation by a predetermined first exposure amount determined by the basic minimum amount, and each label area of the recording surface is exposed to a second radiation by a second exposure amount which corresponds to a density in a corresponding local area of the original image, so that the first and second exposure amounts cooperate to form the latent image.
REFERENCES:
patent: 4664506 (1987-05-01), Seki et al.
patent: 4712909 (1987-12-01), Oshikoshi
patent: 4786944 (1988-11-01), Sakamoto et al.
Akao Michitoshi
Asano Yuki
Hayakawa Kiyoharu
Hayashi Shigeyuki
Katoh Tokunori
Reynolds Bruce A.
Tran Huan
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