Patent Number: 6,305,284

Title: Method and apparatus for making an offset printing plate

Abstract: The present invention concerns a plate making method of forming an image on a heat sensitive blank plate by a multichannel method using a plate making apparatus of an outer surface cylinder scanning type. A blank plate (400) is secured to the outer circumferential surface of a hollow cylinder (131). A laser beam (800) is irradiated from an optical head (150) onto the blank plate (400). The laser beam (800) is a beam group consisting of a plurality of infrared laser beams arranged in a line.

Inventors: Watanabe; Miyoshi (Fuji, JP), Mochizuki; Masami (Fuji, JP)

Assignee: Asahi Kasei Kabushiki Kaisha

International Classification: B41C 1/10 (20060101); B41M 005/00 (); B41J 002/315 ()

Expiration Date: 10/23/2018