- Patent Title: Coating formulation for printing plate precursor, printing plate precursor, printing press, fabrication process of printing plate, and regeneration process of printing plate
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Application No.: US10131594Application Date: 2002-04-25
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Publication No.: US07070903B2Publication Date: 2006-07-04
- Inventor: Yasuharu Suda , Hiroshi Tonegawa , Minoru Sueda , Hideaki Sakurai , Yoshiyuki Tasaka , Yasuhiro Akita , Toyoshi Ohto , Kimihiko Ohya , Shuuichi Nagahata
- Applicant: Yasuharu Suda , Hiroshi Tonegawa , Minoru Sueda , Hideaki Sakurai , Yoshiyuki Tasaka , Yasuhiro Akita , Toyoshi Ohto , Kimihiko Ohya , Shuuichi Nagahata
- Applicant Address: JP Tokyo JP Himeji
- Assignee: Mitsubishi Heavy Industries, Ltd.,Mikuni Color Ltd.
- Current Assignee: Mitsubishi Heavy Industries, Ltd.,Mikuni Color Ltd.
- Current Assignee Address: JP Tokyo JP Himeji
- Agency: Armstrong, Kratz, Quintos, Hanson & Brooks, LLP
- Priority: JP2001-133155 20010427; JP2001-168498 20010604; JP2001-168499 20010604; JP2001-168500 20010604
- Main IPC: G03F7/04
- IPC: G03F7/04

Abstract:
Disclosed are a printing plate precursor, a fabrication process of the printing plate precursor, a fabrication process of a printing plate, a regeneration process of the printing plate, a printing press, and a coating formulation for the printing plate precursor. According to the present invention, a printing plate can be fabricated directly from digital data, and sufficient image quality can be obtained without a developing step, i.e., a developer. To permit repeated use of the precursor, the precursor has a surface, which contains a photocatalyst and is capable of showing hydrophilicity when exposed to activating light having energy higher than band gap energy of the photocatalyst. A coating formulation—which comprises fine particles of a thermoplastic resin having both a property that the particles unite to the surface when heated and a property that the particles decompose under action of the photocatalyst when exposed to activating light having energy higher than band gap energy of the photocatalyst—is applied as a hydrophobizing agent onto the surface. At least a part of the surface of the precursor is heated such that the fine particles applied on the part of the surface are fixed to form a hydrophobic image area. The fine particles applied on the remaining part of the surface with the image area formed thereon are then removed.
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