Abstract: A photographic recording material having a support which has at least one light-sensitive silver halide emulsion layer on one side and at least one layer or layer region which comprises a laser additive on the other side (the reverse side) is outstandingly suitable for printing with a laser coder.

Abstract: A method and apparatus for producing prints of different formats from negatives in the form of strips. The negative images are printed in one reproduction scale on one section of a strip of stock during a first pass of the strip through the printing mechanism, the printing mechanism is readjusted, and the negative images are then printed in another, different scale on a subsequent section of the strip of stock during another pass of the strip through the printing mechanism.

Abstract: Rolls of webs of photosensitive paper are accumulated into a stack on the upper reach of a belt conveyor which slopes upwardly and has a prop for the lowermost roll of the stack. The topmost roll of the stack is transferred to an unwinding station by an inflatable mandrel which is mounted on a pivotable lever and is movable by the lever between a horizontal position at the unwinding station and an inclined position in which it extends into and can be inflated in the interior of the core of the topmost roll of the stack. A catcher locates the leader of the web on the roll at the unwinding station and delivers the leader into the nip of two transporting rollers which advance the leader into a printer. When the supply of web on the core at the unwinding station is exhausted, the empty core is separated from the mandrel by a stripping device and the mandrel is ready to remove the next topmost roll from the upper reach of the conveyor.

Abstract: An exposed and developed filmstrip has a longitudinally extending row of image areas and a row of perforations along each longitudinal margin. The image areas and perforations have no fixed positional relationship. The filmstrip is conveyed lengthwise from a scanning station to an operating station. A procedure involving the filmstrip is performed at the operating station when an image area is present at such station. To establish the arrival of an image area at the operating station, the filmstrip is photoelectrically scanned at the scanning station to locate the leading edge of the image area. The leading edge is conveyed from a preselected location, which may or may not be the scanning station, to the oeprating station along a path of fixed length. The length of the path is expressed in terms of the spacing between neighboring perforations of a row and the arrival of the leading edge at the operating station is established by counting perforations as the filmstrip travels.

Abstract: Light containing blue, green and red radiation is passed through a colored original which is to be printed on color copy material. The transmitted light is spread out into a color spectrum which extends across a first wavelength range generally corresponding to the blue portion of the spectrum, a second wavelength range generally corresponding to the green portion of the spectrum and a third wavelength range generally corresponding to the red portion of the spectrum. The intensity of the transmitted light is measured throughout the spectrum and average of the resulting raw intensities are taken oer each of a series of wavelength intervals which are much shorter than the first, second and third ranges. The copy material has a gamma value for each wavelength interval and such gamma value represents the spectral sensitivity of the copy material in the corresponding interval. The average intensity for each wavelength interval is multiplied by the respective gamma value to yield a corrected intensity.

Abstract: A color copier has a first station for scanning a colored original in each of the primary colors so as to measure the proportions of such colors in the original. The measurements are sent to a computer which calculates the exposure time in each primary color for reproduction of the original. The copier further has a second station for reproducing the original on any one of several different color copy materials. The spectral sensitivities of the copy materials differ for any given primary color so that the copy materials define a family of sensitivity curves in each primary color. An illuminating device is movable between the two stations and generates the light used for scanning as well as for copying. Thus, the scanning light and copy light have the same spectral composition. The illuminating device carries a separate source of light in each primary color and the emission spectrum of each source projects no higher than the lowest curve of the family of sensitivity curves for the corresponding color.

Abstract: A strip of originals is copied onto a band of copy material at high speed using a highly automated copier which measures the densities of the originals in the primary colors and calculates exposures from the densities. The calculated exposures for each original in each primary color are recorded. The band of exposed copy material is developed and the copies are evaluated. Unsatisfactory copies are marked. The band of copy material is subsequently cut into individual copies and the unsatisfactory copies, as well as the corresponding originals, are collected. These originals are recopied in a second copier which is far less sophisticated and expensive than the first copier. The exposures used to recopy an original are derived by applying correction factors to the recorded exposures for the original. By performing the recopying procedures, which are rather slow because they require manual operations, in a second copier, the output of the high speed copier can be maintained.