Gravure printer with doctor blade grinding abrasive edged sheet
AssigneeSony Corporation
InventorShigeyoshi Hirashima
Life of this patent
Estimating the term…
Abstract
A Gravure printer comprises a mounting cylinder, an engraved printing sheet wound on the mounting cylinder, an ink supplier for supplying a surface of the printing sheet with ink, a doctor blade having a leading edge which scrapes the surface of the printing sheet to remove excess ink, and an impression cylinder for pressing a cut paper against the surface of the printing sheet. The feature of the invention is that the printing sheet is provided with an abrasive part to which the leading edge of the doctor contacts to be ground during rotation of the mounting cylinder.
Claims17
A printing apparatus comprising:
- a mounting cylinder on which an engraved printing sheet is wound;
- an impression cylinder for pressing a print material against a surface of said engraved printing sheet;
- ink supply means for supplying the surface of said engraved printing sheet with ink;
- and
- a doctor blade for scraping the surface of said engraved printing sheet to remove excess ink therefrom,
- wherein said engraved printing sheet is provided with an abrasive part to which a leading edge of said doctor blade contacts to be ground during rotation of said mounting cylinder.
A printing sheet for use in a printing apparatus which has a mounting cylinder and a doctor blade, said printing sheet comprising:
- a flexible base plate which is to be wound round said mounting cylinder;
- means for providing a surface of said flexible base plate with a desired engraved images;
- and
- an abrasive portion provided on said flexible base plate, said abrasive portion grinding a working edge of said doctor blade under rotation of said mounting cylinder.
A Gravure printer comprising:
- a mounting cylinder which is rotatable about its axis;
- an engraved printing sheet wound around said mounting cylinder to rotate therewith;
- an ink supplier for supplying a surface of said engraved printing sheet with ink;
- a doctor blade having a leading edge which scrapes the surface of said engraved printing sheet to remove excess ink therefrom;
- and
- an impression cylinder for pressing a cut paper against said surface of the engraved printing sheet,
- wherein said engraved printing sheet is provided with an abrasive part to which said leading edge of the doctor blade contacts to be ground during rotation of said mounting cylinder.
Dependencies are inferred from the claim text.