Stencil printing drum, with opening to allow ink return to insid

Details Stencil printing drum, with opening to allow ink return to insid Stencil printing drum, with opening to allow ink return to insid

1998-06-29

1999-06-22

Burr, Edgar

Printing

Stenciling

Rotary machines

101116, B41L 1306

Patent

active

059132655

ABSTRACT:
A stencil printing drum includes a cylindrical circumferential wall which includes an ink permeable area and an ink impermeable area surrounding the ink permeable area. The wall is wrapped with a perforated stencil sheet and driven to rotate around a central axis of itself. The drum also includes an ink supply roller provided inside the wall for supplying ink to an inner surface of the wall. The roller presses ink outwardly from the ink permeable area to pass through a perforated area of the stencil sheet wrapped around the wall for printing. The drum also includes an ink impermeable projection. The projection is provided on a rear end portion of the ink permeable area in a rotating direction of the wall along one of the generatrices of the cylindrical wall. The projection projects inside the cylindrical wall, thereby dividing the ink permeable area and the ink impermeable area. The drum also includes an ink cover sheet provided on an outer surface of the cylindrical wall to cover an area ranging from the ink impermeable area to the ink impermeable projection. The ink cover sheet is fixed at a rear end portion thereof in the rotating direction of the wall. The cylindrical wall has an opening after the ink impermeable projection in the rotating direction and the opening is formed adjacent to the projection and along one of the generatrices of the cylindrical wall.

REFERENCES:
patent: 5255599 (1993-10-01), Kobayasi et al.
patent: 5483878 (1996-01-01), Hanzawa
patent: 5617786 (1997-04-01), Negishi
patent: 5673620 (1997-10-01), Negishi et al.

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