Ink eradicator system including film forming polymer

• US 5,378,752 A
• Filed: 11/05/1992
• Issued: 01/03/1995
• Est. Priority Date: 11/05/1992
• Status: Expired due to Term

• Current Assignee: Berol Corp (Newell Brands Inc.)
• Original Assignee: Gillette Company (The Procter & Gamble Company)
• Inventors: White, Donald P., Loftin, Rachel M.
• Primary Examiner(s): Michl, Paul R.
• Assistant Examiner(s): Rajguru, U. K.
• Application Number:
  US08/972,268
• Time in Patent Office: 789 Days
• Field of Search: 523/161, 524/418
• US Class Current: 524/418
• CPC Class Codes: B43L 19/0018 with fluids
• CPC Class Codes: C09D 10/00 Correcting fluids, e.g. fluid media for correction of typographical errors by coating correcting errors by overprinting B41J29/36

Abstract

An ink eradicator system is provided which includes an eradicator fluid that includes a reducing agent, a film-forming polymer and water.

Claims

1. An ink eradicator system comprising an eradicator fluid comprising a reducing sulfur compound, from about 15 to 40 weight percent of a film-forming polymer, said polymer being provided in the form of an emulsion, and water, and

an ink comprising a colorant that is capable of being reduced by said reducing compound.

3. A system of claims 1 or 2 wherein the film-forming polymer is an acrylic polymer.

4. A system of claim 3 wherein the acrylic polymer is selected from the group consisting of polymethacrylates, polyacrylates and mixtures thereof.

5. A system of claim 4 wherein the acrylic polymer is a butylacrylate/methylmethacrylate blend.

6. A system of claim 1 or 2 wherein the eradicator fluid includes from about 0.5 to 4.0 weight percent reducing agent, from about 15 to 40 weight percent film-forming polymer, and from about 55 to 95 weight percent water.

7. A system of claim 1 wherein said sulfur compound is a sulfite salt.

8. A system of claim 1 or 2 wherein said colorant is a dye.

9. A system of claim 1 or 2 wherein said colorant is reduced to colorless form.

2. An ink eradicator system comprising

an eradicator fluid that includes a reducing agent, at least 8% of a film-forming polymer, and water, and

an ink comprising a colorant that is capable of being reduced by the reducing agent.

10. A system of claim 2 wherein said reducing agent is a sulfite salt.