Folding system with photoelectric detection means

Details Folding system with photoelectric detection means Folding system with photoelectric detection means

1977-01-25

1978-04-25

Smith, Alfred E.

Sheet-material associating

Associating or disassociating

Sheet associating

250227, 250571, 270 68R, 270 69, G02B 514, H01J 516, H01J 3912

Patent

active

040859282

ABSTRACT:
A system comprising a light source, a plurality of fiber form optical light guides each having one end proximate to said light source and in a position to operatively receive light input therefrom; light projector means proximate to and in a position to receive light from the other end of at least some of said light guides; photodetector means spaced from and optically aligned with said projector means adopted and positioned to receive light projected from said light projection means; sheet or film form material intermittently disposed in moving contact with said light projector means and disposed between said light projector and said photo-detector; and means, operative in response to the modulating effect of said sheet form material on said light projector-photo-detector combination, for performing a function on said sheet form material.

REFERENCES:
patent: 3773315 (1973-11-01), Tsien
patent: 3806730 (1974-04-01), Tirkkonen et al.

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