US5093180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid transfer articles and method for producing them
Assignee: Praxair ST Technology Inc
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Filing: 1989-05-02
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Granted: 1992-03-03
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Expires: 2009-05-02
Abstract
Abstract The invention relates to a liquid transfer article, such as a printing roll, having a laser-engraved coated surface comprised of wells adapted to receive a liquid and land areas adapted to be wiped free of any liquid prior to contacting a receiving surface so that only the liquid in the wells are transferred. The land areas of the coated surface have a density of greater than 95% theoretical and a roughness of less than 6 micro-inches R a to insure that any unwanted liquid on the land areas can be wiped clean prior to contacting a receiving surface. The invention also relates to a method for producing the liquid transfer article.
Inventors
- 👤 Russell M. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:35
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/04; B41C1/05; B41N; B41N1/00; B41N1/006; B41N7/00; B41N7/06; B41N2207/00; B41N2207/02; B41N2207/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24479; Y10T428/24612; Y10T428/24802; Y10T428/24926; Y10T428/24942; Y10T428/24992; Y10T428/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A liquid transfer article coated with a material selected from the group consisting of ceramic and metallic carbide, said coated surface comprising a first portion containing a plurality of laser-engraved wells adapted for receiving a liquid and said wells being from 10 to 300 microns in diameter and from 5 to 250 microns in height, and a second portion comprising smooth land areas between said wells that have a density of greater than 95% theoretical, a surface roughness of less than about 6 micro-inches R a and a surface hardness of at least 800 HV 0 .3.
Claim 2
Dependent Claim
97 words
A liquid transfer article coated with a material selected from the group consisting of ceramic and metallic carbide, said coated surface comprising a first portion containing a plurality of laser-engraved wells adapted for receiving a liquid and said wells being from 10 to 300 microns in diameter and from 5 to 250 microns in height, and a second portion comprising smooth land areas between said wells that have a density of greater than 95% theoretical, a surface roughness of less than about 6 micro-inches R a and a surface hardness of at least 800 HV 0 .3.
Claim 3
Dependent Claim
20 words
The liquid transfer article of claim 1 wherein the surface roughness is less than about 4 micro-inches R a .
Claim 4
Dependent Claim
27 words
The liquid transfer article of claim 1 wherein the coated material is selected from the group consisting of chromium oxide, aluminum oxide, silicon oxide and mixtures thereof.
Claim 5
Dependent Claim
16 words
The liquid transfer article of claim 1 wherein the article is steel coated with chromium oxide.
Claim 6
Dependent Claim
22 words
The liquid transfer article of claim 2, 3 or 4 wherein the density of the land areas is greater than 97% theoretical.
Claim 7
Dependent Claim
17 words
The liquid transfer article of claim 2, 3 or 4 wherein said article is a cylindrical roll.
Claim 8
Dependent Claim
18 words
The liquid transfer article of claim 2, 3 or 4 wherein said article is a cylindrical gravure roll.
References Cited (Backward Citations)
GB2049102A
Cited
US4787837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |