Unitary doctor blade assembly
AssigneeBenton Graphics, Inc.
InventorRobert R. C. Benton
Life of this patent
Estimating the term…
Abstract
A doctor blade assembly consisting of a first section and a second section. The first section acts as a backup for the second section. The second section includes a leading portion, which is of a reduced thickness and has a bevel to wipe excess ink from a gravure cylinder. The first and second sections are adhered to each other. The second section can be notched to alleviate the deleterious effects of camber.
Claims17
An apparatus for use in a gravure press for wiping excess ink from the surface of a gravure cylinder, comprising a one-piece doctor blade structure formed of two attached sections, said first section being made from a metallic, non-doctor blade material and including a first surface, said second section being made of doctor blade steel and including a leading portion and a trailing portion, said leading portion being of reduced thickness as compared to the thicknesses of the trailing portion, said leading portion including means for wiping the excess ink from the surface of a gravure cylinder, said second section including a first surface, a portion of said first section first surface in contact with a portion of said second section first surface, and means for setting a predetermined controlled camber in said second section by adhering stressed portions of said second section to said first section to form a rigid one-piece doctor blade assembly which has a flexural strength and spring constant not altered by the presence between said first and second sections of the material being doctored either in liquid, semi-solid or solid state, whereby said rigid one-piece doctor blade assembly can be inserted into and used in a gravure press.
An apparatus for use in a gravure press for wiping excess ink from the surface of a gravure cylinder comprising a one-piece doctor blade structure formed of two attached sections, said first section having a first surface, said second section having a first surface, a portion of each of said first and second section first surfaces being bonded to each other, said second section first surface extending in part past the end of said first section first surface and terminating in a forward doctoring portion and means for minimizing the deleterious effects of camber in said second section including spaced apart cold worked portions in the portion of said second section which is bonded to said first surface of said first section.
Dependencies are inferred from the claim text.