Printing drum of rotary stencil printer having flexible perforat

Details Printing drum of rotary stencil printer having flexible perforat Printing drum of rotary stencil printer having flexible perforat

1994-11-01

1996-09-17

Burr, Edgar S.

Printing

Stenciling

Rotary machines

101119, B41L 1304

Patent

active

055558020

ABSTRACT:
In order to make the bulging out deformation of the printing drum of a rotary stencil printer having a flexible cylindrical body by the internal press roller to be more easy and more uniform over the entire width of the printing, a flexible perforated sheet (20) forming the flexible cylindrical body of the printing drum is beforehand constructed to be a cylindrical body with its opposite annular edge portions being laid over a pair of annular portions (10a, 10b) connected with one another by a transverse bar portion (12), wherein the internal circumferential length of the cylindrical body made of the flexible perforated sheet is larger than the outer circumferential length of the annular portions by a determinate amount for allowing a part of the flexible cylindrical body to bulge radially outwardly, and the flexible cylindrical body is latched at a portion thereof laid one over the other with the transverse bar portion against relative circumferential movement while relatively movable in the radial direction within a determinate range against the transverse bar portion.

REFERENCES:
patent: 3811378 (1974-05-01), Bohm
patent: 4026208 (1977-05-01), Horne, Jr. et al.
patent: 4911069 (1990-03-01), Hayama et al.
patent: 5090312 (1992-02-01), Ohinata
patent: 5255599 (1993-10-01), Kobayashi et al.

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