Patent US5126531A successfully refreshed from Google Patents.
US5126531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making an intaglio printing surface
Assignee: Sony Corp
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Filing: 1989-09-08
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Granted: 1992-06-30
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Expires: 2009-09-08
Abstract
Abstract Apparatus for making a plate cylinder of an intaglio plate that can be used in gravure printing. The apparatus includes a printing plate sheet made of a thermoplastic resin and wrapped around a metal cylinder. A semiconductor laser source irradiates the circumferential surface of the printing plate sheet with a laser beam to form concave portions or cells on the circumferential surface of the printing plate sheet in response to the tones of a picture. The sheet with the holes formed therein is used as a printing plate. A plate cylinder for intaglio printing is thus formed directly by using an electrical signal.
Inventors
- 👤 Osamu Majima
- 👤 Kazuo Kobayashi
- 👤 Sohichi Kuwahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:32
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/04; B41N; B41N1/00; B41N1/16; B41N1/22; B41C1/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
Apparatus for making a printing plate comprising: a cylinder; a thermoplastic resin sheet wrapped around said cylinder, said thermoplastic resin sheet including about 20 percent by weight of carbon as a heat absorbing material for improving heat exchange characteristics of the thermoplastic resin sheet in interaction with a heat source; first drive means coupled to said cylinder for rotating said cylinder at a predetermined rate; means for generating pulse-number-modulated drive pulses; semiconductor laser beam projection means responsive to said drive pulses and having a power not substantially exceeding one watt for projecting a laser beam on said resin sheet to act as a heat source and alter the resin sheet in accordance with image information; and second drive means coupled to said laser beam projection means for moving said laser beam projection means in an axial direction of said cylinder at a predetermined rate; whereby said laser beam sublimates a variable amount of said resin sheet in accordance with said image information.
Claim 2
Dependent Claim
162 words
Apparatus for making a printing plate comprising: a cylinder; a thermoplastic resin sheet wrapped around said cylinder, said thermoplastic resin sheet including about 20 percent by weight of carbon as a heat absorbing material for improving heat exchange characteristics of the thermoplastic resin sheet in interaction with a heat source; first drive means coupled to said cylinder for rotating said cylinder at a predetermined rate; means for generating pulse-number-modulated drive pulses; semiconductor laser beam projection means responsive to said drive pulses and having a power not substantially exceeding one watt for projecting a laser beam on said resin sheet to act as a heat source and alter the resin sheet in accordance with image information; and second drive means coupled to said laser beam projection means for moving said laser beam projection means in an axial direction of said cylinder at a predetermined rate; whereby said laser beam sublimates a variable amount of said resin sheet in accordance with said image information.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |