Chambered doctor blade inker system

Details Chambered doctor blade inker system Chambered doctor blade inker system

1989-12-11

1991-01-08

Burr, Edgar S.

Printing

Inkers

Roller

101157, B41F 3104

Patent

active

049826603

ABSTRACT:
The chambered doctor blade unit is intended to ink an anilox roller (10) with ink having a viscosity of at least 1 d Pa s and preferably greater than 40 d Pa s. Each of the side walls (3) when the inker is in operative position with respect to the anilox roller (10) form circumferential gaps (13) with respect to the anilox roller, having a width (A) of between about 0.1 to 3 mm, thereby preventing wear and tear on the side walls and sealing of the receptors or cells of the anilox roller with a braided material. The doctor blades (4, 5) are resiliently pressed against upper (20) and lower edges of the side walls, to prevent formation of undulation, the side walls being formed with recessed surfaces (11) facing the anilox roller, with abraded surfaces terminate in inclined relief surfaces (19) forming an inclined gap, to permit escape of ink adjacent the lateral surfaces. To prevent uncontrolled escape of ink, an ink deflection shield (22) extends from the outside of the side walls towards an ink trough (9 ) and forming a run-out chamber with the relieved surfaces.

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