Drum type image scanning and recording apparatus
AssigneeDainippon Screen Mfg. Co., Ltd.
InventorsTeruo Fujii, Tomikazu Tsutsui
Life of this patent
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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.
Claims6
A drum type image scanning and recording apparatus having a drum, around whose cylindrical external surface a film is fixedly wrapped, and a drum driving apparatus mechanically coupled to said drum for rotating the drum, the apparatus comprising:
- a string tensionally stretched close to and along the external surface of said drum in parallel with the drum axis;
- string stretching means for supporting said string tensionally;
- swing detecting means for detecting the swing of said string produced when part of the film and said string are in contact with each other when said drum is rotating and the film separates away from the drum external surface;
- and
- drum braking means for stopping rotation of the drum in accordance with said detection signal from said swing detecting means.
Dependencies are inferred from the claim text.