Blade type squeegee device for a stencil printing device

Abstract

Abstract Ink leakage from the trailing edge of the stencil master plate is avoided and a stable ink supply is ensured when using a D-type printing drum (1) including a concentric cylindrical part (3) extending over a major part of an entire circumference of the printing drum and defining an ink permeable region, a non-concentric cylindrical or planar part (5) extending over a minor part of an entire circumference of the printing drum and having a central axial line different from that of the concentric cylindrical part, and an outer circumferential surface on which a stencil master plate is to be mounted without losing the benefit of reducing the displacement of the press roller (7). A squeegee blade (37) is in contact with the inner circumferential surface of the D-type printing drum, and, in order to maintain the contact between the squeegee blade and the inner circumferential surface of the D-type printing drum over its entire circumference and keep the contact pressure between the squeegee blade and the inner circumferential surface of the D-type printing drum at a prescribed level, a cam (51) is provided for controlling the contact pressure between the squeegee blade and the inner circumferential surface of the D-type printing drum in synchronism with the rotation of the D-type printing drum. Preferably, a linkage mechanism prevents reduction in a squeegee angle of the squeegee blade engaging the non-concentric cylindrical or planar part of the printing drum.

Inventors

• 👤 Junnosuke c/o Riso Kagaku Corporation Katsuyama
• 👤 Takanori C/O Riso Kagaku Corporation Hasegawa

Bibliographic Details