Overlap detection apparatus and method

Details Overlap detection apparatus and method Overlap detection apparatus and method

1999-09-23

2000-10-10

Bollinger, David H.

Sheet feeding or delivering

Feeding

With means to interrupt feeding

271263, 27126504, B65H 712

Patent

active

061293512

ABSTRACT:
An overlap detection apparatus having a conveyance path for conveying letters including a letter release section where the letters are not held, a bending section formed in the letter release section, and a butt into which the forward end of the letters released from the conveyance path in the bending section is brought into contact. A detector is provided for detecting the forward end of a letter on the butt and an overlap judging arrangement for judging an overlap of letters based on the result of detection by the detector. The detector includes a light source for projecting light on the surface of a letter and a line sensor having a plurality of light receiving elements arranged in a line, wherein the line sensor detects a shadow of the forward end of the letters cast by the light source.

REFERENCES:
patent: 3834289 (1974-09-01), Behrens et al.
patent: 4577852 (1986-03-01), Grunder
patent: 5560598 (1996-10-01), Goldkuhle
patent: 5984303 (1999-11-01), Oohara et al.

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