Printing – Stenciling – Rotary machines
Patent
1998-12-22
2000-09-05
Funk, Stephen R.
Printing
Stenciling
Rotary machines
271182, 271270, B41L 1314, B65H 2968
Patent
active
061126551
ABSTRACT:
A stencil printer includes a rotary printing drum around which the stencil master is wrapped, a main motor which rotates the printing drum, a press roller which is rotatable in parallel to the printing drum in contact with the printing drum, and a pair of opposed conveyor rollers which feed a printing paper between the printing drum and the press roller. A conveyor roller motor is provided separately from the main motor and drives the conveyor rollers. A printing drum rotation detector detects rotation of the printing drum on the basis of the reference position, and a conveyor roller rotation detector detects rotation of at least one of the conveyor rollers. A conveyor roller controller controls, when the leading end of the printing paper reaches vicinity of the contact line of the printing drum and the press roller, the conveyor roller motor to drive the conveyor rollers at a target rotating speed which is lower than the rotating speed of the printing drum detected by the printing drum rotation detector and is set so that the difference between the actual rotating speed of the conveyor roller detected by the conveyor roller rotation detector and the target rotating speed is kept substantially constant.
REFERENCES:
patent: 4791866 (1988-12-01), Kanno et al.
patent: 4972207 (1990-11-01), Ishiyama et al.
patent: 5240239 (1993-08-01), Kim
patent: 5493968 (1996-02-01), Ishikawa
patent: 5678488 (1997-10-01), Yamaguchi et al.
patent: 5979311 (1999-11-01), Kakurai et al.
Kaneda Hiroshi
Sunagawa Hiroyuki
Suzuki Masao
Funk Stephen R.
Peabody LLP Nixon
Riso Kagaku Corporation
Studebaker Donald R.
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