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US3906141A Expired / Lapsed US ⏱️ 0.0 years remaining

Printing system

Assignee: International Business Machines Corp
•
Filing: 1973-08-15
•
Granted: 1975-09-16
•
Expires: 1993-08-15
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Abstract

Abstract In the system of the present invention the ink used is a low concentration aqueous solution of a compound that forms a visible percipitate with a metal ion. The compound and the cooperating ion are selected to produce the desired precipitate color and for greater convenience is selected to react at room temperature. The metal ion is imparted to the printing surface either by inclusion during the manufacture of the paper stock or by treating the paper surface at some subsequent time including during the printing cycle prior to the printing operation.

Inventors

  • 👤 Clifford W Anderson
  • 👤 Daniel O Castrodale
  • 👤 Jerry T Martin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 04:01
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5218; B41M3/00; B41M3/001; B41M3/006; B41M5/0011; B41M5/0023; B41M5/502; B41M5/508; C; C09; C09D; C09D11/00; C09D11/50; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 99 words
A PRINTING SYSTEM INCLUDING PAPER STOCK TREATED WITH A LIGHTLY COLORED OR COLORLESS SOLUTION WHICH PROVIDES A SOURCE OF IONS FROM THE GROUP CONSISTING OF, FERROUS CUPROUS AND COBALTOUS IONS EXPOSED AT THE PRINTING SURFACE, HAVING SELECTIVELY APPLIED THERETO AN INK AS A CONTROLLED PATTERN OF DROPLETS PROPELLED TOWARD SAID PRINTING SURFACE TO FORM VISIBLE INDICIA THEREON, SAID INK COMPRISING AN AQUEOUS SOLUTION INCLUDING AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF A SALT OF A METAL CYANIDE COMPLEX, 8-HYDROXYQUINOLINE, AND 1NITROSO-2-NAPHTHOL-3,6-DISULFONIC ACID, SAID COMPOUND BEING FROM ABOUT 0.25% BY WEIGHT OF SAID SOLUTION TO A SATURATED SOLUTION.
Claim 2
Dependent Claim 99 words
A PRINTING SYSTEM INCLUDING PAPER STOCK TREATED WITH A LIGHTLY COLORED OR COLORLESS SOLUTION WHICH PROVIDES A SOURCE OF IONS FROM THE GROUP CONSISTING OF, FERROUS CUPROUS AND COBALTOUS IONS EXPOSED AT THE PRINTING SURFACE, HAVING SELECTIVELY APPLIED THERETO AN INK AS A CONTROLLED PATTERN OF DROPLETS PROPELLED TOWARD SAID PRINTING SURFACE TO FORM VISIBLE INDICIA THEREON, SAID INK COMPRISING AN AQUEOUS SOLUTION INCLUDING AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF A SALT OF A METAL CYANIDE COMPLEX, 8-HYDROXYQUINOLINE, AND 1NITROSO-2-NAPHTHOL-3,6-DISULFONIC ACID, SAID COMPOUND BEING FROM ABOUT 0.25% BY WEIGHT OF SAID SOLUTION TO A SATURATED SOLUTION.
Claim 3
Dependent Claim 24 words
The printing system of claim 1 wherein said ink further comprises a non-ionic surfactant that has a concentration of 0.0001% to 1.0% by weight.
Claim 4
Dependent Claim 18 words
The printing system of claim 2 wherein said non-ionic surfactant is a mono aryl ether of polyethelene glycol.
Claim 5
Dependent Claim 22 words
The printing system of claim 1 wherein said compound has a concentration in said aqueous solution between 0.5% and 3% by weight.
Claim 6
Dependent Claim 29 words
The printing system of claim 4 wherein the said metal ions in said compound will react to form a precipitate at a temperature between 60* Fahrenheit and 80* Fahrenheit.
Claim 7
Dependent Claim 35 words
The printing system of claim 1 wherein said paper stock is treated with a solution of ferrous ammonium sulfate and said ink comprises an aqueous solution containing 0.5% to 3% by weight of potassium ferricyanide.
Claim 8
Dependent Claim 20 words
The printing system of claim 1 wherein said paper stock is treated by an aqueous solution including a ferrous compound.
Claim 9
Dependent Claim 34 words
The printing system of claim 1 wherein said paper stock is treated with a solution of ferrous ammonium sulfate and said ink comprises an aqueous solution containing 0.5% to 3% by weight of 8-hydroxyquinoline.
Claim 10
Dependent Claim 34 words
The printing system of claim 1 wherein said paper stock is treated with a solution of copper sulfate and said ink comprises an aqueous solution containing 0.5% to 3% by weight of 1-nitroso-2-naphthol-3,6-disulfonic acid.
Claim 11
Dependent Claim 35 words
The printing system of claim 1 wherein said paper stock is treated with a solution of ferrous amonium sulfate and said ink comprises an aqueous solution containing 0.5% to 3% by weight of 1-nitroso-2-naphthol-3,6-disulfonic acid.
Claim 12
Dependent Claim 100 words
A printing system including paper stock treated with a lightly colored or colorless solution which provides a source of ions from the group consisting of ferrous, cuprous and cobaltous ions exposed at the printing surface; having applied thereto an ink by a selective pressure-free application to said printing surface to form a visible indicia at such surface; said ink comprising an aqueous solution including at least one compound which forms a visible precipitate with the said metal ions at the printing surface of said paper stock, said compound being from 0.25% by weight of said solution to a saturated solution.
Claim 13
Dependent Claim 100 words
A printing system including paper stock treated with a lightly colored or colorless solution which provides a source of ions from the group consisting of ferrous, cuprous and cobaltous ions exposed at the printing surface; having applied thereto an ink by a selective pressure-free application to said printing surface to form a visible indicia at such surface; said ink comprising an aqueous solution including at least one compound which forms a visible precipitate with the said metal ions at the printing surface of said paper stock, said compound being from 0.25% by weight of said solution to a saturated solution.
Claim 14
Dependent Claim 47 words
The printing system of claim 11 wherein said ink applied to the printing surface of said paper stock comprises an aqueous solution containing 0.5% to 3% by weight of a compound from the group consisting of a salt of a metal cyanide complex; 8-hydroxyquinoline; and 1-nitroso-2-naphthol-3,6-disulfonic acid.
Claim 15
Dependent Claim 20 words
The printing system of claim 12 wherein said paper stock is treated by an aqueous solution including a ferrous compound.

References Cited (Backward Citations)

US1950982A Cited
US3281860A Cited
US3558341A Cited
US3632377A Cited
US3824101A Cited
US3732141A Cited
US3723156A Cited
US3732120A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-15 1979-03-17 1979-09-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-15 1983-03-17 1983-09-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-15 1987-03-17 1987-09-16 $7700.00 Window Closed / Lapsed

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