Method and apparatus for exposing printing forms,申请号US20020141841-传众专利搜索

Method and apparatus for exposing printing forms

申请公布号：US6768505(B2)

申请号：US20020141841

申请日期：2002.05.09

申请公布日期：2004.07.27

申请人：

HEIDELBERGER DRUCKMASCHINEN AG

发明人：ZELENKA THOMAS

分类号：B41J2/44;B41J2/45;B41J2/455;G03F7/20;G03F7/24;(IPC1-7):B41J2/435;B41J2/447;B41J2/47

主分类号：B41J2/44

摘要：A method and an apparatus for exposing photosensitive material, in particular for exposing a printing form, in which a surface to be exposed of the photosensitive material is scanned by at least one light beam. The light beam is emitted by a light source and, before striking the photosensitive material, is optionally modulated, interrupted and/or deflected. An exposure head is provided and moved at a constant distance from the surface in relation to the latter and to the light source in order to scan the surface of the photosensitive material with the light beam. In order to make the exposure head as light as possible, after the light beam has emerged from the light source substantially parallel to the surface to be exposed, the light beam is deflected through a gaseous medium toward the exposure head and there should be reflected onto the surface.