Negative carrier for photographic printer

Details Negative carrier for photographic printer Negative carrier for photographic printer

1995-06-02

1996-08-27

Grimley, Arthur T.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 40, 355 75, G03B 2752

Patent

active

055506135

ABSTRACT:
A negative carrier for a photographic printer, which is installed on a photographic printer for print-exposing an image on a negative film onto a photosensitive material, and which effects the positioning of the negative film during print-exposure of the photosensitive material. The negative carrier includes a sensor disposed in a transporting passage of the negative film so as to detect information concerning the negative film; and a controlling device for determining the presence or absence of the negative film over the sensor on the basis of a detection signal from said sensor, and for calibrating the sensor if it is determined that the negative film is absent. The sensor is prevented from being calibrated erroneously in a state in which the negative film is present over the sensor, thereby facilitating the calibration of the sensor.

REFERENCES:
patent: 3835332 (1974-09-01), Bridges
patent: 4864149 (1989-09-01), Matsumoto
patent: 5071514 (1991-12-01), Francis
patent: 5119126 (1992-06-01), Tokuda
patent: 5352900 (1994-10-01), Dragon et al.

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