US5379698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing members for use with laser-discharge imaging
Assignee: Presstek LLC
•
Filing: 1994-05-20
•
Granted: 1995-01-10
•
Expires: 2014-05-20
Abstract
Abstract Lithographic printing plates suitable for imaging by means of laser devices that emit in the near-infrared region. Laser output ablates a titanium layer sandwiched between an oleophobic or hydrophilic layer and a polyester layer, resulting in an imagewise pattern of features on the plate. The image features exhibit an affinity for ink or an ink-abhesive fluid that differs from that of unexposed areas.
Inventors
- 👤 Michael T. Nowak
- 👤 Thomas E. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1033; B41N; B41N1/00; B41N1/003; B41N1/12; B41N1/14; B41C2201/00; B41C2201/02; B41C2201/04; B41C2210/00; B41C2210/02; B41C2210/04; B41C2210/08; B41C2210/16; B41C2210/24; B41P; B41P2227/00; B41P2227/70
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
A lithographic printing member directly imageable by laser discharge, the member comprising: a. a topmost first layer which is polymeric; and b. a thin metal layer underlying the first layer; and c. a substrate underlying the metal layer; wherein d. the metal layer is formed of a material which is subject to ablative absorption of imaging infrared radiation and the first layer is not; and e. the first layer and the substrate exhibit different affinities for at least one printing liquid selected from the group consisting of ink and an abhesive fluid for ink.
Claim 2
Dependent Claim
94 words
A lithographic printing member directly imageable by laser discharge, the member comprising: a. a topmost first layer which is polymeric; and b. a thin metal layer underlying the first layer; and c. a substrate underlying the metal layer; wherein d. the metal layer is formed of a material which is subject to ablative absorption of imaging infrared radiation and the first layer is not; and e. the first layer and the substrate exhibit different affinities for at least one printing liquid selected from the group consisting of ink and an abhesive fluid for ink.
Claim 3
Dependent Claim
10 words
The member of claim 1 wherein the metal is tintanium.
Claim 4
Dependent Claim
26 words
The member of claim 1 wherein the metal is selected from the group consisting of alloys of titanium, aluminum, alloys of aluminum, nickel, iron and chromium.
Claim 5
Dependent Claim
18 words
The member of claim 1 wherein the metal is deposited to a thickness of less than 200 Å.
Claim 6
Dependent Claim
19 words
The member of claim 1 wherein the metal is deposited to an optical density ranging from 0.2 to 1.0.
Claim 7
Dependent Claim
18 words
The member of claim 1 wherein the metal is deposited to an optical density of 2.5 or less.
Claim 8
Dependent Claim
11 words
The member of claim 1 wherein the first layer is oleophobic.
Claim 9
Dependent Claim
14 words
The member of claim 7 wherein the first layer is a silicone chemical species.
Claim 10
Dependent Claim
21 words
The member of claim 8 wherein the silicone is anchored to the metal layer by means of a silane adhesion promoter.
Claim 11
Dependent Claim
11 words
The member of claim 1 wherein the first layer is hydrophobic.
Claim 12
Dependent Claim
15 words
The member of claim 10 wherein the first layer is a polyvinyl alcohol chemical species.
Claim 13
Dependent Claim
22 words
The member of claim 11 wherein the polyvinyl alcohol is anchored to the metal layer by means of a titanate adhesion promoter.
Claim 14
Dependent Claim
21 words
The member of claim 1 wherein the first layer is anchored to the metal layer by means of an adhesion promoter.
Claim 15
Dependent Claim
23 words
The member of claim 1 wherein the substrate comprises first and second surfaces, at least one of which has means to improve adhesion.
Claim 16
Dependent Claim
24 words
The member of claim 1 wherein the substrate comprises first and second surfaces, at least one of which has means to reduce static buildup.
Claim 17
Dependent Claim
30 words
The member of claim 1 wherein the substrate comprises first and second surfaces, the first has means to improve adhesion and the second surface has means to reduce static buildup.
Claim 18
Dependent Claim
16 words
The member of claim 1 further comprising an antireflective layer between the metal and first layers.
Claim 19
Dependent Claim
14 words
The member of claim 1 wherein the substrate is laminated to a metal support.
References Cited (Backward Citations)
US3506779A
Cited
US3654864A
Cited
US3678852A
Cited
US3745235A
Cited
US3780358A
Cited
US3911376A
Cited
US3664737A
Cited
US3836709A
Cited
US4054094A
Cited
US3760175A
Cited
US3803511A
Cited
US3832718A
Cited
US4046986A
Cited
US3964389A
Cited
US4020762A
Cited
US4132168A
Cited
US3985953A
Cited
US3962513A
Cited
US3945318A
Cited
US4247611A
Cited
US4149798A
Cited
US4212672A
Cited
US4347785A
Cited
US4334003A
Cited
US4245003A
Cited
US4395946A
Cited
US4458994A
Cited
US4390610A
Cited
US4460831A
Cited
US4729310A
Cited
US4718340A
Cited
US4599295A
Cited
US4588674A
Cited
US4501811A
Cited
US4628813A
Cited
US4675357A
Cited
US4504141A
Cited
US4622179A
Cited
US4492750A
Cited
US4550061A
Cited
US4711834A
Cited
US4731317A
Cited
US4592977A
Cited
US4788514A
Cited
US4784933A
Cited
US4749840A
Cited
US4877480A
Cited
US4743091A
Cited
DE3714157A1
Cited
US4948699A
Cited
US4872189A
Cited
JPH0235789A
Cited
US4881231A
Cited
US4917454A
Cited
US4918304A
Cited
US5156938A
Cited
US5011261A
Cited
US5101414A
Cited
JPH03197192A
Cited
JPH03197191A
Cited
JPH03197190A
Cited
US4975729A
Cited
US4975728A
Cited
US5015064A
Cited
US5102758A
Cited
US5093147A
Cited
US5082799A
Cited
US5171650A
Cited
WO1992007716A1
Cited
US5093832A
Cited
US5095491A
Cited
US5107509A
Cited
JPH058367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |