Photosetting apparatus
AssigneeScangraphic Dr. Boger GmbH
InventorBernd Holthusen
Life of this patent
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Abstract
In a photosetting apparatus which operates with a rotary mirror (25) which is illuminated by a modulated laser beam and which is arranged on a carriage (15), the carriage (15) is axially movably suspended on a tie beam (13) which simultaneously connects two basic members (12) provided at the end faces of the apparatus with one another into a rigid arrangement. A transparent regular cylindrical body (30) is clamped between the basic members and the photosensitive material which is scanned by the laser scanning beam (69) is laid around the transparent regular cylindrical body.
Claims29
A photosetting apparatus comprising a transparent segment of a regular cylinder around which a photosensitive material can be laid with the photosensitive layer towards the inside, and a rotary mirror illuminated by a laser beam modulated in accordance with the symbols to be set, wherein the rotary mirror is arranged with the laser, the modulator and the image forming optical system on a carriage displaceable in controlled manner along the axis of said segment, and wherein the rotary mirror generates a radial scanning beam which leaves the cylinder axis and executes a rapid periodic scanning movement in the peripheral direction of said segment, characterised in that said segment (11) of a regular cylinder is held at its end faces at two plate-like basic members (12) which rest on a support (29) and which are connected into a rigid arrangement by a tie beam (13) arranged radially spaced apart from the cylinder axis (14) and carried only by the basic members (12), with the tie beam being preferably adjustable relative to the basic members (12) perpendicular to the cylinder axis;
- and in that the carriage (15) is axially displaceably held on the tie beam (13).
Dependencies are inferred from the claim text.