Correction fluid marker and formulation for fluid

• US 5,964,931 A
• Filed: 12/30/1998
• Issued: 10/12/1999
• Est. Priority Date: 12/31/1997
• Status: Expired due to Fees

• Current Assignee: American Management Systems, Incorporated (CGI, Inc.), Correct Solutions
• Original Assignee: Correct Solutions
• Inventors: Korper, George W.
• Primary Examiner(s): KLEMANSKI, HELENE G
• Application Number:
  US09/222,837
• Time in Patent Office: 286 Days
• Field of Search: 106/31.93, 106/31.6, 106/31.66, 106/31.9
• US Class Current: 106/31.93
• 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

A correction fluid that prevents clogging of the delivery nib of a correction fluid marker separates into liquid and solid phases while not in use, thereby allowing the liquid phase to transport lubricants and anti-oxidants into the nib between uses to restore and preserve the nib. The correction fluid includes a thixotropic gel that soft settles and creates a gelatinized long lasting network of hydrogen bonded fibers in the formulation which are rejuvenated by shaking of the applicator and which do not appreciably agglomerate over time. The correction fluid further includes weak solvents and mild resins which advantageously do not swell the nib fibers or destroy the adhesives in the nib over time. A correction fluid marker 10 for applying the correction fluid includes a hollow barrel 12 having an interior reservoir 18 for holding the correction fluid, and a porous nib 20 held in a sleeve 22 at one end of the barrel in communication with the reservoir. The correction fluid travels through the nib via capillary action and is applied to a print medium from the tip of the nib protruding from the sleeve. A thin seal 26 seals the correction fluid in the reservoir and prevents the correction fluid from contacting the nib prior to the first use of the marker. A mixing slug 24 having a pointed tip ruptures the seal when brought into contact with the seal by shaking the marker at the time of first use. The marker can have a compressible barrel for squeezing out correction fluid, or a rigid barrel containing pressurize correction fluid releasable with a valve mechanism 58, 60.

Claims

1. A correction fluid composition comprising components that separate into plural phases upon standing in a closed container, wherein the plural phases include a liquid phase having a lubricant and an anti-oxidant that prevents coagulation of the correction fluid.

2. The correction fluid composition of claim 1, wherein said lubricant is a silicone lubricant.

3. The correction fluid composition of claim 1, wherein said anti-oxidant is a fuel additive.

4. The correction fluid composition of claim 1, wherein said components include:

a solvent;

a resin dissolvable in said solvent;

a thixotropic gel;

a pigment;

a dispersant; and

said lubricant and said anti-oxidant.

5. The correction fluid composition of claim 4, wherein said solvent is a weak solvent and said resin is a mild resin.

6. The correction fluid composition of claim 5, wherein said solvent comprises at least one of:

heptane;

odorless mineral spirits;

methylcyclohexane;

an aliphatic hydrocarbon C₈ -C₁₁ ; and

an isoparaffinnic solvent.

7. The correction fluid composition of claim 4, wherein said thixotropic gel comprises at least one of:

a castor oil derivative; and

fumed silica.

8. The correction fluid composition of claim 4, wherein said pigment is titanium dioxide.

9. The correction fluid composition of claim 4, wherein said lubricant is a silicone lubricant.

10. The correction fluid composition of claim 4, wherein said anti-oxidant is a fuel additive.

11. The correction fluid composition of claim 1, further comprising a propellant.

12. The correction fluid composition of claim 11, wherein said propellant is an aliphatic propellant having a kauri butonal value of less than approximately 27 KB.

13. A method of manufacturing a correction fluid composition, comprising the steps of:

a) dissolving a resin in a solvent;

b) blending in a dispersant;

c) blending in a pigment;

d) blending in a thixotropic gel;

e) blending in a lubricant; and

f) blending in an anti-oxidant that prevents coagulation of the correction fluid.

14. The method of claim 13, wherein step a) includes dissolving a mild resin in a weak solvent.

15. The method of claim 14, wherein step a) includes dissolving the mild resin in at least one of:

heptane;

odorless mineral spirits;

methylcyclohexane;

an aliphatic hydrocarbon C₈ -C₁₁ ; and

an isoparaffinnic solvent.

16. The method of claim 13, wherein step c) includes adding titanium dioxide.

17. The method of claim 13, wherein step d) includes adding at least one of:

a castor oil derivative; and

fumed silica.

18. The method of claim 13, wherein step e) includes adding a silicone lubricant.

19. The method of claim 13, wherein step f) includes adding a fuel additive.