US4536218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and compositions for lithographic printing in multiple layers
Assignee: Individual
•
Filing: 1984-02-08
•
Granted: 1985-08-20
•
Expires: 2004-02-08
Abstract
Abstract Printed materials such as tickets, lottery forms, cards and contest forms, bearing a hidden message which is revealable by scratching off a covering opaque layer, are prepared by printing the message on the substrate, lithographing a protective layer such as a clear varnish or a pigmented varnish-ink over the hidden message, and then lithographing a hiding coat over the applied protective layer. The protective layer formulation and the hiding coat layer are both based upon compatible, preferably the same, film forming resin systems, and are deposited from a common solvent. The protective layer may provide a clear, colorless transparent film through which the message may be viewed, or a colored see-through layer, so that it constitutes one color layer also for the printing of other areas of the substrate.
Inventors
- 👤 Eli A. Ganho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/005; B41M3/14; Y; Y10; Y10S; Y10S283/00; Y10S283/901; Y10S283/903; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31844; Y10T428/31848; Y10T428/31851
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A varnish composition suitable for lithographic application to a substrate to cover indicia printed thereon preparatory to hiding said indicia with an abrasively removable hiding coat, said composition including the following ingredients in the following approximate weight range: ______________________________________
Components % Range
______________________________________
Magie oil (solvent) 30-35
Phenolic modified rosin ester
16-20
Hydrocarbon resin 13-17
Linseed-[isophtholic] isophthalic alkyd
10-13
Hydrocarbon plasticizer
7-10
Montan wax 3-6
Calcium perborate 1.5-3
Maganese octoate 1.5-2
Cobalt octoate 0.5-1
Gelling agent 0.5-0.7
Chinawood oil 0.3-0.5
______________________________________
Claim 2
Dependent Claim
81 words
A varnish composition suitable for lithographic application to a substrate to cover indicia printed thereon preparatory to hiding said indicia with an abrasively removable hiding coat, said composition including the following ingredients in the following approximate weight range: ______________________________________
Components % Range
______________________________________
Magie oil (solvent) 30-35
Phenolic modified rosin ester
16-20
Hydrocarbon resin 13-17
Linseed-[isophtholic] isophthalic alkyd
10-13
Hydrocarbon plasticizer
7-10
Montan wax 3-6
Calcium perborate 1.5-3
Maganese octoate 1.5-2
Cobalt octoate 0.5-1
Gelling agent 0.5-0.7
Chinawood oil 0.3-0.5
______________________________________
Claim 3
Dependent Claim
85 words
A pigmented varnish-ink composition suitable for lithographic application to a substrate to cover indicia printed thereon preparatory to hiding said indicia with an abrasively removable hiding coat, said composition including the following ingredients in the following approximate weight range: ______________________________________
Components % Range
______________________________________
Magie oil (paraffin based solvent)
20-28
Phenolic modified rosin ester
14-18
Hydrocarbon resin 8-12
Linseed-isophthalic alkyd
6-10
Hydrocarbon plasticizer
6-8
Montan wax 2-5
Calcium perborate 1-3
Manganese octoate 1-2
Cobalt octoate 0.5-1
Gelling agent 0.3-0.5
Chinawood oil 0.3-0.5
Pigment 16-25
______________________________________
Claim 4
Dependent Claim
85 words
A pigmented varnish-ink composition suitable for lithographic application to a substrate to cover indicia printed thereon preparatory to hiding said indicia with an abrasively removable hiding coat, said composition including the following ingredients in the following approximate weight range: ______________________________________
Components % Range
______________________________________
Magie oil (paraffin based solvent)
20-28
Phenolic modified rosin ester
14-18
Hydrocarbon resin 8-12
Linseed-isophthalic alkyd
6-10
Hydrocarbon plasticizer
6-8
Montan wax 2-5
Calcium perborate 1-3
Manganese octoate 1-2
Cobalt octoate 0.5-1
Gelling agent 0.3-0.5
Chinawood oil 0.3-0.5
Pigment 16-25
______________________________________
Claim 5
Dependent Claim
79 words
A hiding coat composition suitable for lithographic application over a cured varnish coating as claimed in claim 1, and including the following ingredients in the following approximate weight ranges: ______________________________________
Components % Range
______________________________________
Titanium dioxide 28-35
Aluminum powder 15-20
Phenolic modified rosin ester
15-18
Linseed oil refined 9-11
Black pigment (carbon black)
7-8
Linseed-isophthalic alkyd
5-8
Magie solvent 5-7
Cobalt octoate 0.5-1
Chinawood oil 0.5-1
Hydrocarbon resin 0.5-1
Polyethylene wax 0.3-0.5
Fischer-Tropsch wax 0.2-0.5
Gelling agent 0.5-1
______________________________________
Claim 6
Dependent Claim
78 words
A hiding coat suitable for lithographic application over a cured pigmented varnish-ink composition according to claim 2, and including the following ingredients in the following approximate weight range: ______________________________________
Components % Range
______________________________________
Titanium dioxide 28-35
Aluminum powder 15-20
Phenolic modified rosin ester
15-18
Linseed oil refined 9-11
Black pigment (carbon black)
7-8
Linseed-isophthalic alkyd
5-8
Magie solvent 5-7
Cobalt octoate 0.5-1
Chinawood oil 0.5-1
Hydrocarbon resin 0.5-1
Polyethylene wax 0.3-0.5
Fischer-Tropsch wax 0.2-0.5
Gelling agent 0.5-1
______________________________________
References Cited (Backward Citations)
US3944695A
Cited
US4225475A
Cited
US4279659A
Cited
US4162997A
Cited
US4244866A
Cited
US4488646A
Cited
US4472537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |