Plate-making method, plate-making apparatus, computer-to-cylinder type lithographic printing method and computer-to-cylinder type lithographic printing apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorsSadao Ohsawa, Yusuke Nakazawa, Mutsumi Naniwa
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Abstract
Disclosed is a plate-making method and a computer-to-cylinder type lithographic printing method, each of which comprises filtering an oil-based ink; forming an image directly on a plate material by an ink jet process comprising ejecting said filtered oil-based ink using electrostatic field based on signals of image data; and fixing said formed image to prepare a printing plate. Also disclosed are a plate-making apparatus and a computer-to-cylinder type lithographic printing method suitable for these methods, respectively.
Claims31
A plate-making method comprising:
- filtering an oil-based ink;
- forming an image directly on a plate material by an ink jet process comprising ejecting said filtered oil-based ink using electrostatic field based on signals of image data;
- and
- fixing said formed image to prepare a printing plate.
A plate-making apparatus comprising:
- an image-forming unit which forms an image directly on a plate material based on signals of image data;
- and
- an image-fixing unit which fixes the image formed by said image-forming unit to prepare a printing plate,
- wherein said image-forming unit comprises an ink jet drawing device having an ejection head which ejects an oil-based ink using electrostatic field and having at least one ink-filtering member provided in a passage of said oil-based ink.
A computer-to-cylinder type lithographic printing method comprising:
- mounting a plate material onto a plate cylinder of a printing apparatus;
- filtering an oil-based ink;
- forming an image directly on said plate material by an ink jet process comprising ejecting said filtered oil-based ink from an ejection head using electrostatic field based on signals of image data;
- fixing said image to prepare a printing plate;
- and
- performing lithographic printing with said printing plate.
A computer-to-cylinder type lithographic printing apparatus comprising:
- a plate cylinder;
- an image-forming unit which directly forms an image on a plate material mounted onto said plate cylinder based on signals of image data;
- an image-fixing unit which fixes the image formed by said image-forming unit to prepare a printing plate;
- and
- a lithographic printing unit which performs lithographic printing with the printing plate,
- wherein said image-forming unit comprises an ink jet drawing device having an ejection head which ejects an oil-based ink using electrostatic field and having at least one ink filtering member provided in a passage of said oil-based ink.
Dependencies are inferred from the claim text.