Printing – Stenciling – Rotary machines
Patent
1999-09-27
2000-08-29
Funk, Stephen R.
Printing
Stenciling
Rotary machines
101410, B41F 2104
Patent
active
061091731
ABSTRACT:
A stencil printing machine includes a printing drum having a flexible ink-permeable circumferential wall adapted to receive a perforated stencil sheet around an outer circumferential surface thereof, the printing drum being driven to rotate around a central axis thereof; a pressing device situated inside the printing drum for supplying ink to an inner surface of the circumferential wall, the pressing device being movable between a pressing position for pressing the circumferential wall to be deformed radially outwardly and a standing position for releasing the circumferential wall from deformation; an opposing drum disposed adjacent to the printing drum and driven to rotate in a direction opposite to that of the printing drum, the opposing drum having a recess formed in an outer circumferential surface thereof; a clamp disposed on an outer circumferential surface of the opposing drum and operating in synchronization with rotation of the opposing drum to hold a leading edge of a printing sheet supplied between the printing drum and the opposing drum; a clamp cover disposed on the outer circumferential surface of the opposing drum adjacent to the clamp relative to the direction of rotation of the opposing drum and covering the recess formed in the opposing drum for allowing operation of the clamp, the clamp cover selectively opening and closing the recess in synchronization with operation of the clamp; and a driving mechanism for driving the clamp cover to move alternately in a circumferential direction of the opposing drum and in a radial direction of the opposing drum.
REFERENCES:
patent: 5553544 (1996-09-01), Ramsay
patent: 5960716 (1999-10-01), Schaede
Funk Stephen R.
Riso Kagaku Corporation
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