Patent ID: 7342598
Filing Date: 2008-03-11
Classification: B41C,B41J,B41P,G03F

Abstract:
1. An image recording apparatus for recording an image by irradiating a printing plate with a light beam, comprising: a holding drum for holding a printing plate; a light emission part for irradiating said printing plate with a light beam to perform writing; a rotation mechanism for scanning an irradiation position of said light beam on said printing plate in a main scan direction by rotating said holding drum relatively to said light emission part; a moving mechanism for scanning said irradiation position in a subscan direction by moving said light emission part relatively to said holding drum along a direction parallel to a rotation axis of said holding drum; a storage part for storing data of an original image; an operation part for generating data of a modified image obtained by substantially modifying width of said original image in said subscan direction in consideration of extension of a paper caused by dampening water in printing with said printing plate, said modified image indicating said original image distorted in said subscan direction without being distorted in said main scan direction; and a control part for controlling emission of said light beam according to said data of said modified image while shifting writing timing in said main scan direction by changing a cycle of a writing clock.