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2. 发明专利

JPH0671859A PRINTING CYLINDER JACKET STRUCTURE FOR GUIDING SHEET 失效
公开(公告)号：JPH0671859A
公开(公告)日：1994-03-15
申请号：JP4252793
申请日：1993-03-03
申请人： ROLAND MAN DRUCKMASCH
发明人： GERUHARUTO HATSUKERUBERUGAA , BUERUNAA ZONDAAGERUTO
IPC分类号： B41F30/00 , B41F22/00 , B41F30/02 , B41F30/04
摘要： PURPOSE: To prevent an image from being smeared by a printing cylinder casing profile for guiding sheets for one-side and perfect printing by arranging a cylinder comprising elevations flatly and in parallel with the axis of the printing cylinder and setting the length of the cylinder with the elevations and the number of screen lines as specific values. CONSTITUTION: The printing cylinder casing profile is structured of a cylinder comprising elevations which are statistically uniformly distributed and form a face against pressure. Further the elevations are arranged flatly and in parallel with the axis of the printing cylinder and besides, perpendicularly to the outer peripheral face of the printing cylinder. The cylinder comprising the elevations is 20-200 μm long L and the number of the screen lines of the elevations is 20-100 lines/cm. In addition, even when a sheet is placed on the face against pressure formed on the ceiling face 5, only the minimal part of the sheet is placed in contact with the face against pressure, in the impression cylinder casing profile 3. Thus it is possible to significantly reduce the ratio of a bearing area compared to the case with a conventional sheet printing press and keep the area ratio at a constant level and further, reliably guide the sheets without fear about image smearing.

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