| 摘要 |
PURPOSE:To improve printing accuracy and workability by providing a limiting mechanism for a UV irradiation range, a clamping device for clamping one end of an original film and a control mechanism for the descending speed of an arm. CONSTITUTION:A limiting mechanism for an irradiation range is disposed with reellike masks 31 at both ends of an irradiation hood 29, and a pair of mask frames 35 are detained slidably between press rolls 17, wherein said frames 35 are made connectable to the masks 31. In a clamping device, an original film F can be clamped by means of a lower clamping piece 39 of which the clamping surface is fixed, and an upper clamping piece 40 which is connected to guide means 44, 45 and a driving means, and is thereby made freely movable upward and downward. In a control mechanism for descending speed, the point where an arm moves close to between photoengraving rolls R is detected, and an air cylinder device 48 driving the arm is controlled by a pneumatic circuit so as to make the speed fast till then and slow thereafter. |
