Patent US4597793A successfully refreshed from Google Patents.
US4597793A
Expired / Lapsed
US
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Desensitizing ink for wet offset printing
Assignee: SICPA Holding SA
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Filing: 1983-03-04
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Granted: 1986-07-01
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Expires: 2003-03-04
Abstract
Abstract In a desensitizing ink for the wet offset printing of a given area of the acceptor surface of a duplicating set containing an alkoxylated nucleophilic compound, preferably having a molecular weight lying in the range of from 2000 to 4000 and having a hydrophilic-lipophilic balance (HLB) of from 3 to 6, emulsified water is added to the mass of ink. This rapidly forms a fine stable emulsion of water in the ink which is favorable for continuous wet offset printing.
Inventors
- 👤 Albert Amon
- 👤 Roger M. Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:37
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/128; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/31504
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A desensitising ink for wet offset printing on an acceptor surface of a chemical duplicating set having at least two superimposed sheets, one of the facing surfaces of which has an electrophilic acceptor coating and the other a nucleophilic coating capable of producing a chromogenic reaction with said electrophilic acceptor coating, wherein the desensitising ink comprises an alkoxylated nucleophilic compound and emulsified water within the ink bulk, the amount of said emulsified water in said ink bulk being sufficient for at least partial wetting of the hydrophilic areas of an offset printing plate.
Claim 2
Dependent Claim
93 words
A desensitising ink for wet offset printing on an acceptor surface of a chemical duplicating set having at least two superimposed sheets, one of the facing surfaces of which has an electrophilic acceptor coating and the other a nucleophilic coating capable of producing a chromogenic reaction with said electrophilic acceptor coating, wherein the desensitising ink comprises an alkoxylated nucleophilic compound and emulsified water within the ink bulk, the amount of said emulsified water in said ink bulk being sufficient for at least partial wetting of the hydrophilic areas of an offset printing plate.
Claim 3
Dependent Claim
34 words
A desensitising ink as claimed in claim 1, in which the amount of emulsified water in the ink bulk is sufficient to ensure optimum saturation of the hydrophilic areas of an offset printing plate.
Claim 4
Dependent Claim
25 words
A desensitising ink as claimed in claim 1, in which the alkoxylated nucleophilic compound has a water/ink balance (HLB) value of from 0 to 8.
Claim 5
Dependent Claim
25 words
A desensitising ink as claimed in claim 3, in which the alkoxylated nucleophilic compound has a water/ink balance (HLB) value of from 3 to 6.
Claim 6
Dependent Claim
23 words
A desensitising ink as claimed in claim 1, in which the alkoxylated nucleophilic compound has a molecular weight of from 700 to 10,000.
Claim 7
Dependent Claim
23 words
A desensitising ink as claimed in claim 1, in which the alkoxylated nucleophilic compound has a molecular weight of from 2,000 to 4,000.
Claim 8
Dependent Claim
18 words
A desensitising ink as claimed in claim 1, in which the nucleophilic compound is a polypropoxylated organic derivative.
Claim 9
Dependent Claim
39 words
A desensitising ink as claimed in claim 1, in which the nucleophilic compound is an adduct of a primary or secondary amine, an alkylene or polyalkylene polyamine or a polyimine with propylene oxide or a mixture of alkylene oxides.
Claim 10
Dependent Claim
26 words
A desensitising ink as claimed in claim 1 in which the ink contains an aqueous solution of a protective colloid emulsified within the mass of ink.
Claim 11
Dependent Claim
18 words
A desensitising ink as claimed in claim 9, in which the protective colloid is a water-soluble cellulose derivative.
Claim 12
Dependent Claim
15 words
A desensitising ink as claimed in claim 10, in which the protective colloid is carboxymethylcellulose.
Claim 13
Dependent Claim
29 words
A desensitising ink as claimed in claim 9, in which the concentration of water and protective colloid is from 1 to 40% of the total weight of the ink.
References Cited (Backward Citations)
US4101690A
Cited
GB2051672A
Cited
JPS56157471A
Cited
JPS56167412A
Cited
JPS5749677A
Cited
JPS5774193A
Cited
JPS57109871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |