Abstract: A method and an apparatus for exposing multi-pages original images or several separate text and/or picture portions onto a light sensitive material like an offset plate or an intaglio plate by a laser exposure process. The apparatus includes a cassette for a light sensitive material, a laser unit for exposing the light sensitive material, a discharge conveyor for the exposed light sensitive material, and an exposure table which is stepwise movable between the plate cassette and the discharge conveyor and under the laser unit. The exposure table is formed with a device for holding the light sensitive material in a predetermined position thereon.

Abstract: A method and a copying frame for copying of negative and positive original films, in combination with or without so called masking films, onto a material which is covered with a light sensitive layer, and having a frame rim of a non-transparent material and a glass plate inserted in a recess of said frame rim, and suction channels (9, 14, 17, 18) provided in said frame rim, and in which the copying frame, for making it possible to handle original films both of a "small" size format and of a "large" size format is formed with two sets of suction grooves, namely a) two cooperating, separate, parallel grooves (14) for suction connecting a "small" size original film (23), which grooves have a length matching the the width of said "small" size film format and are arranged along a part of the long sides of the frame rim, and b) two separate and cooperating, mainly C-shaped grooves (17) having the openings thereof facing each other and being arranged for suction connecting an original film of the "large" size film f

Abstract: A method and an apparatus for exposing several different original images onto a light sensitive material like an offset plate or an intaglio plate by means of a laser exposure process, whereby the light sensitive plate(6), is exposed in several stages with a minor part of the light sensitive plate(6) at the time by an exposure method with three cooperating movements of the parts of the apparatus, namely a) a stepwise displacement of an exposure table (5) in a first direction (X-direction), b) a stepwise displacement of a laser unit (3) in a second direction (Y-direction) which is perpendicular to said first direction, and c) a successive displacement in said first or second direction (X or Y-direction) by a laser gun (13) while sweep exposing the light sensitive material by means of laser light beam whereby the exposure table (5) and the carrier of the laser unit (3) are in fixed positions.

Abstract: A burnout frame for printing of a transparent original film (4) to a collecting film or printing plate (1) and a simultaneous burning out of non-image-carrying areas by means of a light of short wavelength, comprising a transparent printing glass (6,7,15), which is larger than the largest original film considered to be printed and which has a clear, central part (15) of an optical glass and of a type, which absorbs a part of the light within the ultraviolet wavelength range, particularly a bronze glass and designed to send light through the original film (4), and a diffused part (6-7) of a plastic material, located outside said part, the printing glass on its underside having one or two arrays of vacuum grooves (8, 9), designed to hold by suction an original film (4) and possibly also a masking film (5), and the glass part (15) of the printing glass being inserted into the plastic part (6-7), located on the outside, and being joined to it by means of a glue (16), which forms a light barrier between the glass

Abstract: The present invention describes a burn-out frame for a copy print machine, comprising a support table on which a film or a printing plate is intended to be mounted, and a copy print frame having exposure light for providing a print of one and the same original film or a series of different original films onto the film or printing plate, and in which the print frame comprises a frame having a transparent glass plate (11), which at the bottom surface thereof is formed with at least one downwardly opening groove (12, 14) for vacuum connecting an original film (13) and eventually a masking film (15), and one or more bores and/or channels (16, 17) opening in said groove (12) for connecting the vacuum groove(s) (12) to a source of sub-pressure, and in which part (19) of the print frame glass corresponding to the largest image area of the original film (13) is clear, and parts (18) of the transparent plate located outside said largest image area are diffused.

Abstract: Methods are described for the preparation of a light sensitive collection surface for use in directly or indirectly printing copies on which text and images are arranged according to a predetermined layout.