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 (6) by means of a laser exposure process, which apparatus comprises a cassette (1) for a light sensitive material (6), a laser unit (3) for exposing said light sensitive material, a discharge conveyor (4) for the ready exposed light sensitive material, and an exposure table (5) which is movable between the plate cassette (1) and the discharge conveyor (4) and under the laser unit (3), and which is formed with means for holding the light sensitive material (6) in a predetermined position thereon, and in which apparatus the laser unit (3) is arranged for taking two different positions, namely a raised position in which the exposure table (5) with the plate (6) can be moved freely under the laser unit (3), and a lowered position, in which the laser unit (3) is being pressed into locking engagement with the plate (6) on the exposure table (5) for making it impossible for the plate (6) and the laser unit (3) to move in relation to each other.
Abstract:
Copy print machine for making exposures by means of laser light on films or plates (3), in particular on films and printing plates for the graphic industry, like offset plates, and comprising a copying table (9) on which printing plates (3) can be placed in predetermined positions, a lower carriage (11) which is displaceable on the copying table (9), an upper carriage (13) which is displaceable on the lower carriage (11) perpendicularly to the displacement direction of said lower carriage (11), and a light house (15) which is mounted on the upper carriage (13), and in which the light housecarries a laser housing (18) having a laser light unit (23) which is arranged for being raised and lowered in the light house (15), and which in its lowered position, in which position exposure is made of the film or plate (3), is adapted to be blocked in a extremely exact vertical position in relation to the film or the printing plate (3) using a light box (25) having a bottom edge (27) arranged for being pressed into contact with the printing plate (3) during the exposure thereof.
Abstract:
A clamping device for sheetlike objects (2), such as a photosensitive film or plates with a photosensitive layer, onto a rotary arranged, preferably cylindrical drums (11) mantle surface (3) by fixing one edge portion (6) of an object. The device is especially characterized by a clamping device (4) equipped with clamping fittings (12, 14) adapted to clamp an edge portion (6) of an object (2) and to prevail in a non activated state by means of a spring force pressed down onto the drum (1) and thereby connecting with and providing one portion of the drum mantle surface (3) and to prevail in a clamping position against said spring force partly raised from the drum, by means of a force (F) preferably applied from the outside of the drum to clamp, by means of the clamping fittings, the object adapted to be hold by means of the clamping fittings by a spring force.
Abstract:
Method and apparatus for mounting and presenting of multi-colour separation films in exactly coinciding and registering positions, e.g. in a copying machine, whereby inter-related part-colour films or carrier foils therefore are provided with punch bores without any demands on accurate in mutual register thereof between the various individual part-colour films, whereupon a first, normative, part coulour film (e.g. B) is mounted with its punch bores on register pins (13) of a light table (11) belonging to a measuring and registering apparatus (14), the position of said normative part-colour film is registered as a zero-position, and the remaining inter-related part-colour films (e.g. Y, M, C) are successively mounted on the register pins (13) of the measuring and registering apparatus (14), and the positions of each such part-colour film is registered, whereby the difference in the X-direction and the Y-direction and the rotational difference (Z) in relation to the zero-position is observed and registered, and said registered differences are used for ultimately positioning of the films e.g. upon copy-printing thereof to a printing plate.