Gretag Imaging Ag

Rudolf Wacker

Walter Kraft

Hugo Knecht

Peter Zolliker

Martin Heller

The invention relates to an arrangement for the processing of light or photo sensitive material with a printing device. Material separated into individual sections is transportable in a preferred direction of a transporting device. In a material processing device with a moving device, the individual material provided with an image is transported in a predominant direction, the preferred direction and the predominant direction differing from one another at an angle. A device at the end section of the printing device forwards the individual material to the material processing device. In accordance with the invention the forwarding device is positioned in such a way that the individual light or photo sensitive is transferable under the transporting device to the material processing device.

Photo lab with transport arrangement

In a method for calibrating a photographic copy printer, developed copies are scanned regionally (such as dotwise), and the measured light transmitted or remitted by each scanned region of the copying material is supplied to a detector array, broken down spectrally, and converted into wavelength- and intensity-dependent measurement data. The electrical measurement signals are digitized, and with their aid, copy-specific measurement data are ascertained. On the basis of the copy-specific measurement data, the original-specific measurement data, and the exposure used in the copying, a model of the original adapted to the copy material and a model for the copy material, or the model (Pi) inverse to it, which forms the basis for calculating the requisite amounts of copying light, are checked with respect to specifiable accuracy criteria and optimized as needed.

Method for calibrating a photographic copy printer

Individual sheets of a sheet material to be treated which arrive in an arrival sequence, are distributed on two or more adjacently located conveying tracks. The sheets are conveyed along the conveying tracks through a processing station and are sorted thereafter in accordance with their arrival sequence. The distribution of the sheets is based on evaluating utilization of the conveying tracks to minimize the distance between sheets following each other on the same transport track. A throughput for sheets with varying length that is approximately equal to the throughput for sheets of same length is achieved.

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Rombach, Switzerland

Rudolf Wacker