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US4600629A Expired / Lapsed US ⏱️ 0.0 years remaining

Selectively absorbent mask printing process

Assignee: Westvaco Corp
•
Filing: 1985-09-16
•
Granted: 1986-07-15
•
Expires: 2005-09-16
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Abstract

Abstract The present printing process provides a unique color tone print of muted contrast in two, sequentially operated, flexographic print stations. A suitable paper substrate base for the process is uncoated white paper of stationery or envelope grade. As the paper supply web is drawn through the first print station, the desired image or design is printed on the paper with a colorless solution of a polyol, such as glycerine, in a glycol ether solvent. The second print station simply lays a uniform color coating of compatible pigment or solvent dye based ink over the entire web surface. Shade or tone differences resulting from differences in ink absorption with respect to the glycerine solution image areas provide a distinctive printed product.

Inventors

  • 👤 David H. Knapp
  • 👤 Robert E. Lafler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 08:32
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/008; B41M3/10; Y; Y10; Y10S; Y10S428/00; Y10S428/918; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24893; Y10T428/24901; Y10T428/24934

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 61 words
A method of printing indicia on an uncoated paper substrate, said method comprising the steps of: printing an indicia pattern on one face of said substrate with a colorless solution of polyol dissolved in a high boiling point solvent of the glycol ether genus; and, coating said indicia printed face of said substrate, including said indicia pattern, with a colored ink.
Claim 2
Independent Claim 61 words
A method of printing indicia on an uncoated paper substrate, said method comprising the steps of: printing an indicia pattern on one face of said substrate with a colorless solution of polyol dissolved in a high boiling point solvent of the glycol ether genus; and, coating said indicia printed face of said substrate, including said indicia pattern, with a colored ink.
Claim 3
Dependent Claim 12 words
A method as described by claim 1 wherein said polyol is glycerine.
Claim 4
Dependent Claim 22 words
A method as described by claim 1 wherein said glycol ether solvent has a boiling point between 248° F. and 365° F.
Claim 5
Dependent Claim 15 words
A method as described by claim 3 wherein said solvent is propylene glycol methyl ether.
Claim 6
Dependent Claim 15 words
A method as described by claim 3 wherein said solvent is dipropylene glycol methyl ether.
Claim 7
Dependent Claim 15 words
A method as described by claim 3 wherein said solvent is diethylene glycol ethyl ether.
Claim 8
Dependent Claim 15 words
A method as described by claim 3 wherein said solvent is ethylene glycol monoethyl ether.
Claim 9
Dependent Claim 16 words
A method as described by claim 3 wherein said ink is a solvent based dye type.
Claim 10
Dependent Claim 16 words
A method as described by claim 3 wherein said ink is a water based pigment type.
Claim 11
Dependent Claim 12 words
The printed article product of the printing process described by claim 1.

References Cited (Backward Citations)

US3085898A Cited
US3140959A Cited
US3288628A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-07-14 1990-01-13 1990-07-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-07-14 1994-01-13 1994-07-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-07-14 1998-01-13 1998-07-15 $7700.00 Window Closed / Lapsed

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