Rotary stencil printer having printing drum having outer periphe

Details Rotary stencil printer having printing drum having outer periphe Rotary stencil printer having printing drum having outer periphe

1989-01-27

1990-03-27

Eickholt, Eugene H.

Printing

Stenciling

Rotary machines

1011271, B41L 1300

Patent

active

049110691

ABSTRACT:
In a rotary stencil printer having a printing drum supported to be rotatable about a central axis thereof and having a cylindrical outer surface adapted to bear a perforated stencil sheet as attached therearound and formed with openings for supplying ink to an inside surface of the perforated stencil sheet, and a back press roller supported to be rotatable about a central axis thereof extending in parallel with the central axis of the printing drum and having a cylindrical outer surface which defines a nip area with the cylindrical outer surface of the printing drum therebetween for nipping and transferring a printing sheet therethrough. The printing drum has an outer peripheral wall portion substantially made of only a net material constructed by weaving or knitting filaments to provide the cylindrical outer surface thereof formed with the openings, and an internal press roller is provided so as to engage the outer peripheral wall portion at a radially inside surface thereof and to press the outer peripheral wall portion radially outwardly toward the back press roller, thereby locally elastically deforming the net material to traverse a nip area clearance when a printing sheet is supplied in the nip area.

REFERENCES:
patent: 2906201 (1959-09-01), Blair, Jr.
patent: 3232224 (1966-02-01), Kramer

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