Sheet extracting mechanism with function for detecting the amoun

Details Sheet extracting mechanism with function for detecting the amoun Sheet extracting mechanism with function for detecting the amoun

1991-03-20

1992-03-17

Howell, Janice A.

X-ray or gamma ray systems or devices

Photographic detector support

Serial film or film pack changer

378174, 378171, 271107, G03B 4204, B65H 308

Patent

active

050974963

ABSTRACT:
A sheet extracting mechanism is provided with a suction cup for attracting one of stacked sheets, a negative pressure source for supplying a suction force to the suction cup, a detector for detecting the pressure in the suction cup, a moving mechanism for moving the suction cup thereby extracting the sheet adhered to the suction cup by the section force, and a discriminator for comparing the suction force in the suction cup with a predetermined pressure, at a predetermined position located a predetermined distance from the bottom of the stack of sheets, thereby identifying the amount of the stacked sheets. The suction cup is temporarily stopped at the predetermined position corresponding to a predetermined number of remaining sheets, and the remaining number of sheets is identified equal to or less than the predetermined number when the suction cup no longer touches the sheet, thereby becoming unable to attract the sheet.

REFERENCES:
patent: 3837638 (1974-09-01), Anderson et al.
patent: 4624454 (1986-01-01), Grutzmacher et al.
patent: 4920553 (1990-04-01), Sasaki et al.
patent: 4936566 (1990-06-01), Hiramatsu
patent: 5037080 (1991-08-01), Wirz

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