PURPOSE: To prevent a happening of a trouble such as condensation of steam rising from a corrugated cardboard sheet inside a frame, staining of a corrugated cardboard sheet by formed waterdrops by dropping thereon in a printing process or lowering of the printing accuracy by waterdrops by falling on a plate on a plate cylinder.
CONSTITUTION: A gate-shape frame 6 supports an impression cylinder 7, a plate cylinder 8, ink roll 9 and a doctor roll 10. A window 16 is formed on the top wall 15 of a cover 14 covering the ink roll 9 and the doctor roll 10 and a fan 17 is fitted to the window 16. Air in the cover 14 is force-discharged outside by the rotation of the fan 17 and rising air current is produced toward the cover 14 in a transfer channel for a corrugated cardboard sheet S which is transferred in the frame 6. If steam rises from the corrugated cardboard sheet S which is transferred between the impression cylinder 7 and the plate cylinder 8, the steam is discharged outward from the frame 6 by ascending air current and prevented from condensing inside the frame.
HAYASHI CHITOSHI
UTSUKI UMEO
OKAMOTO TERUO
KOIDE KUNIO
| JPH0528635B2 | 1993-04-26 | |||
| JPH06947A | 1994-01-11 | |||
| JPH01208134A | 1989-08-22 | |||
| JPS603032B2 | 1985-01-25 |
Next Patent: STRUCTURE OF PLATE CYLINDER FOR ROTARY PRINTER