Photocopying – Projection printing and copying cameras – Detailed holder for photosensitive paper
Patent
1985-11-19
1987-01-20
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Detailed holder for photosensitive paper
346138, 355 75, 355104, 355110, 358291, G03B 2758, H04N 108
Patent
active
046377107
ABSTRACT:
A drum type image scanning and recording apparatus, with a drum around whose cylindrical external surface a film is fixedly wrapped and a drum-driving apparatus mechanically coupled to the drum for rotating the drum, has a string tensionally stretched nearby and along the external surface of the drum in parallel with the drum axis by a string stretching device. A swing detecting device detects the swing of the string produced when part of the film and the string are in contact with each other, as when the drum is rotating and the film separates away from the drum external surface. The rotation of the drum is stopped in response to an abnormality detection signal from the swing detecting device, thus precluding significant physical separation of the film from the drum.
REFERENCES:
patent: 3938119 (1976-02-01), Schwartz
patent: 4054884 (1977-10-01), Nelson
patent: 4111565 (1978-09-01), Jagger
patent: 4204180 (1980-05-01), Usui et al.
patent: 4330798 (1982-05-01), Heyer et al.
patent: 4440491 (1984-04-01), Takahama
Fujii Teruo
Tsutsui Tomikazu
Dainippon Screen Mfg. Co,. Ltd.
Wintercorn Richard A.
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