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专利名称：Laser engraving machine for preparing
rotary screen printing screens
发明人：Peter M. Zollman,Brendon T.
Pollard,Andrew D. Birch
申请号：US07/275997申请日：19881125公开号：US04878127A公开日：191031
摘要：A laser engraving machine for engraving rotary printing screens includes a shaft(1) having one end connected to a rotary drive (3)for rotating the shaft (1), two end ringassemblies (7, 8) at least one (8) of which is movable along the shaft (1) and which arearranged to locate concentrically and fix opposite ends of a rotary printing screen (2) tothe shaft (1). The machine also includes a laser engraving device including a head (4)movable backwards and forwards parallel to the axis of rotation of the shaft (1) toengrave a printing screen (2) and a support (9, 13). The support (9, 13) is movable alongthe screen (2) with the laser engraving head (4) to provide local support for the screen (2)so that the part being engraved is supported at a constant predetermined position withrespect to the head (4) of the laser engraving device. Preferably the suppport includes aring (9, 13) having a cylindrical supporting surface and the ring (9, 13) has a radius ofcurvature slightly greater than that of the screen (2) and has its axis slightly offsetradially inwards from the axis of rotation of the shaft (1).
申请人：ZED INSTRUMENTS LTD.
代理机构：Sughrue, Mion, Zinn, Macpeak and Seas
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