The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 1998
Filed:
Aug. 14, 1995
Jefferson H Taylor, Dallas, TX (US);
Eugene L. Green, Sr., Dallas, TX (US);
Abstract
A magnetic plate cylinder for a printing press includes an outer cylinder member having circumferentially and axially spaced plugs of magnetic material or axially spaced apart rings of magnetic material for directing a magnetic field in such a way as to hold a magnetic printing plate on the outer surface of the outer cylinder member. An inner cylinder member includes circumferentially and axially spaced permanent magnet members supported on a cylinder of nonmagnetic material or stacked circular ring magnets interposed between rings of magnetic or nonmagnetic material for generating a magnetic field passing through the plugs or rings of magnetic material on the outer cylinder member. The inner cylinder member is disposed to form a radial air gap between the outer cylinder member and an outer surface of the inner cylinder member. The inner cylinder member can be rotated or axially translated relative to the outer cylinder member to change the intensity of the magnetic field to provide for positioning a printing plate on or removing a printing plate from the outer cylinder member. Ring magnets on the inner cylinder member may be of conventional polarization with poles on opposite side faces of the ring or with poles formed on the radially inner and outer circumferential surfaces of the ring.