Patent US2776528A successfully refreshed from Google Patents.
US3615751A
Expired / Lapsed
US
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Process and composition for preventing offsetting of drying printing ink
Assignee: Salvat Editores SA
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Filing: 1968-12-11
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Granted: 1971-10-26
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Expires: 1988-12-11
Abstract
Abstract A process and composition of matter for preventing undried ink on printed sheets of paper from offsetting or imprinting onto adjacent sheets, for example in a printing process employing a high-speed offset press, including the steps of forming a printing ink additive containing starch particles uniformly dispersed in a nonaqueous medium compatible with the printing ink, mixing the ink additive with the printing ink, contacting the starch-containing printing ink with water, and printing the ink on sheets of paper which are then stacked.
Inventors
- 👤 Manuel J Lecha
- 👤 Jose S Mascaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:07
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; B; B41; B41M; B41M1/00; B41M1/06; C08; C08L; C08L3/00; C08L3/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
In a process as set forth in claim 1 the additional step of mixing into the ink additive from 0.25 percent to 2 percent (by weight) of a compound selected from the group consisting of organic acids and their acid salts, said acids having the chemical formula R-COOH, wherein R represents a hydrocarbon.
Claim 2
Dependent Claim
85 words
A substantially nonaqueous additive composition adapted to be mixed with offset printing ink for preventing the offsetting of drying printed ink, comprising: a nonaqueous oil-based fluid medium, being compatible and completely miscible with the printing ink; and a plurality of starch particles swellable in water and having a maximum average diameter of 30 microns when in dry form, said particles also comprising at least 10 percent by weight of the additive and being substantially completely dispersed in the fluid medium at the time of preparation.
Claim 3
Dependent Claim
48 words
An additive composition as described in claim 3, wherein said additive contains additionally from 0.25 percent to 2 percent (by weight) of a compound selected from the group consisting of organic acids and their acid salts, said acids having the chemical formula R-COOH, wherein R represents a hydrocarbon.
Claim 4
Dependent Claim
87 words
A substantially nonaqueous offset printing ink adapted to be used in an offset printing process for preventing the offsetting of drying printed ink, comprising: a. printing ink, comprising ink solvent, pigment, resin and drier; b. from 0.3 percent to 3.3 percent (by weight) starch particles swellable in water substantially completely dispersed in the printing ink having a maximum average diameter of 30 microns when in dry form; and c. up to 20 percent (by weight) nonaqueous oil-based fluid medium compatible and completely miscible with the printing ink.
Claim 5
Dependent Claim
40 words
A printing ink as described in claim 5, wherein the printing ink contains additionally a compound selected from the group consisting of organic acids and their acid salts, said acids having the chemical formula R-COOH, wherein R represents a hydrocarbon.
Claim 6
Dependent Claim
97 words
A process for preparing an additive composition adapted to be mixed with printing ink for preventing the offsetting of drying printing ink, comprising the steps of: a. contacting 1. a nonaqueous oil-based fluid medium compatible and completely miscible with the printing ink, and (2) at least 10 percent (by weight) starch particles in a mixing device, said particles having a maximum average diameter of 30 microns when in dry form and being swellable in water; and b. mixing the fluid medium and the starch particles until the starch particles are substantially completely dispersed in the fluid medium.
Claim 7
Dependent Claim
59 words
In a process as set forth in claim 7 the additional steps of: a. contacting (1) a substantially nonaqueous printing ink comprising ink solvent, pigment, resin and drier, and 2) said additive composition; and b. gently mixing the printing ink and the composition to achieve substantially complete distribution of the starch particles in the composition throughout the printing ink.
Claim 8
Dependent Claim
57 words
A process as set forth in claim 7, wherein from 0.25 percent to 2 percent (by weight) of a compound selected from the group consisting of organic acids and acid salts, said acids having the chemical formula R-COOH, wherein R represents a hydrocarbon, is mixed with the fluid medium and the starch particles in the mixing device.
Claim 9
Dependent Claim
59 words
In a process as set forth in claim 9 the additional steps of: a. contacting 1. a substantially nonaqueous printing ink comprising ink solvent, pigment, resin and drier, and 2. said additive Composition; and b. gently mixing the printing ink and the composition to achieve substantially complete distribution of the starch particles in the composition throughout the printing ink.
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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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |