Surface Secured Patents (Class 101/415)
  • Block copy sheet for lithographic printing plate
    Patent number: 6484634
    Abstract: A block copy sheet for lithographic printing plate to be interposed between a plate cylinder and a lithographic printing plate having a front surface and a back surface, at least the back surface being made of a material other than metals, wherein the block copy sheet have convex portions provided on a surface thereof, the convex portions having a predetermined shape so as to concave the back surface of the lithographic printing plate when pressed against the back surface of the lithographic printing plate, and wherein (1) the convex portions comprises a composite particle having protrusions provided on the surface thereof and having a hardness greater than that of the back surface of the lithographic printing plate and a particle diameter of from 1 &mgr;m to 100 &mgr;m, or (2) the convex portions comprises non-spherical fillers having an average length of from 1 &mgr;m to 200 &mgr;m and the contact area of the convex portions and the back surface of the lithographic printing plate is from 0.6% to 3.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: November 26, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seishi Kasai, Takao Nakayama, Hiroyuki Ohishi
  • Method and device for automatically providing a printing plate to a plate cylinder
    Patent number: 6460457
    Abstract: A method for automatically providing a printing plate to a plate cylinder includes the steps of aligning a first edge of a printing plate against a cylinder adjacent to a plate cylinder, moving the first edge of the printing plate into a gap in the plate cylinder, and wrapping the printing plate about the plate cylinder. The present invention also includes a device for attaching a printing plate to a plate cylinder comprising a first set of grippers for gripping a printing plate and aligning the printing plate against a cylinder adjacent to the plate cylinder, and a second set of grippers for moving the printing plate toward a gap in the plate cylinder. An offset printing press having the device is also disclosed.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: October 8, 2002
    Assignee: Heidelberger Druckmaschinen AG
    Inventor: Bertrum Scott Ramsay
  • Apparatus for positioning a pad or book of sheets on the work table of printing apparatus
    Patent number: 4027591
    Abstract: Apparatus for the positioning of a loose leaf or bound pad or book on the work table of an apparatus for printing the individual leaves of the pad or book comprising a holder member which is disposed to extend transversely of the work table and located on or near one end of the work table.
    Type: Grant
    Filed: March 26, 1975
    Date of Patent: June 7, 1977
    Inventor: Hans Gubela