US4833117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel correction compositions and process for using same
Assignee: Berol Corp
•
Filing: 1987-12-03
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Granted: 1989-05-23
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Expires: 2007-12-03
Abstract
Abstract Correction compositions for correcting markings provided on the surface of a pressure-sensitive chemical recording medium carrying a developer material which comprises an acidic developer by interaction of the developer material with a color-providing material. The compositions comprise a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming material, and a Lewis acid. The composition is applied to a marking to provide a film which covers the marking, and a visible corrected marking can be provided on the film by applying a pattern of color-providing material corresponding to the corrected marking to the film.
Inventors
- 👤 Lamar E. Brooks
- 👤 Sue R. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:11
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/128
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
138 words
A process for correcting a marking provided on a surface of a pressure-sensitive recording medium carrying a developer material comprising an acidic developer, said marking having been provided by interaction of the developer material with a color-providing material which comprises the steps of: a. applying to that portion of the surface of the medium having the marking to be corrected, a composition comprising a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming binder material and a Lewis acid in amounts effective to provide a film which can cover the marking and can provide a visible corrected marking on contact and interaction with a pattern of a color-providing material corresponding to the corrected marking, and b. applying a pattern of said color-providing material corresponding to the corrected marking to the film covering the marking to be corrected.
Claim 2
Dependent Claim
138 words
A process for correcting a marking provided on a surface of a pressure-sensitive recording medium carrying a developer material comprising an acidic developer, said marking having been provided by interaction of the developer material with a color-providing material which comprises the steps of: a. applying to that portion of the surface of the medium having the marking to be corrected, a composition comprising a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming binder material and a Lewis acid in amounts effective to provide a film which can cover the marking and can provide a visible corrected marking on contact and interaction with a pattern of a color-providing material corresponding to the corrected marking, and b. applying a pattern of said color-providing material corresponding to the corrected marking to the film covering the marking to be corrected.
Claim 3
Dependent Claim
31 words
A process of claim 1 where the composition is colored so that the color of the composition closely corresponds to the color of the surface of the medium having the marking.
Claim 4
Dependent Claim
30 words
A process of claim 1 where the binder, pigment, and Lewis acid are dispersed in a non-flammable organic solvent having a boiling point between about 60° to about 85° C.
Claim 5
Dependent Claim
10 words
A process of claim 3 where the solvent comprises 1,1,1-trichloroethane.
Claim 6
Dependent Claim
11 words
A process of claim 1 where the pigment comprises titanium dioxide.
Claim 7
Dependent Claim
17 words
A process of claim 1 where the polymeric film-forming binder material comprises a vinyl toluene acrylic polymer.
Claim 8
Dependent Claim
34 words
A process of claim 1 where the Lewis acid is selected from the group consisting of AlCl 3 , ZnCl 2 , CaCl 2 , acidic clays and acidic polymers or mixtures of these.
Claim 9
Dependent Claim
23 words
A process of claim 1 where the composition includes an effective amount of plasticizer to improve the flexibility or adhesion of the film.
Claim 10
Dependent Claim
24 words
A process of claim 1 where the composition includes an effective amount of a dispersing agent to improve the covering power of the pigment.
Claim 11
Dependent Claim
23 words
A process of claim 1 where the composition includes an effective amount of a thickening agent to control settling of the dispersed ingredients.
Claim 12
Dependent Claim
23 words
A process of claim 1 where the Lewis acid comprises ZnCl 2 and the composition includes a solvent for the ZnCl 2 .
Claim 13
Dependent Claim
25 words
A process of claim 1 where the Lewis acid comprises ZnCl 2 and the composition includes ethanol as a solvent for the ZnCl 2 .
Claim 14
Dependent Claim
175 words
A process of claim 1 where the composition comprises the following ingredients in amounts based on parts by weight of the total composition: a. from about 80 to about 125 parts by weight of a non-flammable organic solvent having a boiling point between about 60° to about 85°, b. from about 30 to about 70 parts by weight of a pigment comprising titanium dioxide, c. from about 3 to about 20 parts by weight of a polymeric film-forming binder material which is soluble in said solvent, d. from about 0.5 to about 15 parts by weight of a Lewis acid selected from the group consisting of AlCl 3 , ZnCl 2 , CaCl 2 , acidic clays and acidic polymers of mixtures of these, e. from about 0 to about 10 parts by weight of a plasticizer to improve the flexibility or adhesion of the film, f. from about 0 to about 10 parts by weight of a dispersing agent, and g. from about 0 to about 5 parts by weight of a thickening agent.
Claim 15
Dependent Claim
148 words
A process of claim 1 where the composition comprises the following ingredients in amounts based on parts by weight of the total composition: a. from about 80 to about 125 parts by weight 1,1,1-trichloroethane, b. from about 30 to about 70 parts by weight of a titanium dioxide, c. from about 3 to about 20 parts by weight of a vinyl toluene acrylic polymer, d. from about 0.5 to about 15 parts by weight of ZnCl 2 , e. from about 0 to about 10 parts by weight of a plasticizer to improve flexibility or adhesion of the film, f. from about 0 to about 10 parts by weight of a dispersing agent, g. from about 0 to about 5 parts by weight of a thickening agent, and h. from about 0.5 to about 15 parts by weight of ethanol as a solvent for the ZnCl 2 .
Claim 16
Dependent Claim
68 words
A process of claim 1 where the composition comprises from about 30 to about 70 parts by weight of an opacifying pigment, from about 3 to about 20 parts by weight of a soluble polymeric film-forming binder material, from about 0.5 to about 15 parts by weight of a Lewis acid and from about 80 to about 125 parts by weight of a solvent for the binder material.
Claim 17
Dependent Claim
117 words
A pressure sensitive chemical recording medium including a surface carrying a marking provided by interaction of a developer material comprising an acidic developer with a color-providing material, said marking being covered by a film formed by a composition comprising a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming binder material and a Lewis acid in amounts effective to provide a film which can cover the marking and can provide a corrected visible marking when a pattern of a color-providing material corresponding to the corrected marking is applied to the film for interaction with the film and a visible corrected marking on the film formed by interaction between said pattern of color-providing material and the film.
Claim 18
Dependent Claim
117 words
A pressure sensitive chemical recording medium including a surface carrying a marking provided by interaction of a developer material comprising an acidic developer with a color-providing material, said marking being covered by a film formed by a composition comprising a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming binder material and a Lewis acid in amounts effective to provide a film which can cover the marking and can provide a corrected visible marking when a pattern of a color-providing material corresponding to the corrected marking is applied to the film for interaction with the film and a visible corrected marking on the film formed by interaction between said pattern of color-providing material and the film.
Claim 19
Dependent Claim
68 words
A recording medium of claim 16 where the composition comprises from about 30 to about 70 parts by weight of an opacifying pigment, from about 3 to about 20 parts by weight of a polymeric film-forming binder material, from about 0.5 to about 15 parts by weight of a Lewis acid and from about 80 to about 125 parts by weight of a solvent for the binder material.
Claim 20
Dependent Claim
23 words
A recording medium of claim 16 where the color of the composition closely corresponds to the color of the surface having the marking.
Claim 21
Dependent Claim
34 words
A recording medium of claim 16 where the pigment, binder and Lewis acid of the composition are dispersed in a non-flammable organic solvent having a boiling point between about 60° to about 85° C.
Claim 22
Dependent Claim
11 words
A recording medium of claim 19 where the solvent comprises 1,1,1-trichloroethane.
Claim 23
Dependent Claim
16 words
A recording medium of claim 16 where the pigment of the composition comprises a titanium dioxide.
Claim 24
Dependent Claim
21 words
A recording medium of claim 16 where the polymeric film-forming binder material of the composition comprises a vinyl toluene acrylic polymer.
Claim 25
Dependent Claim
38 words
A recording medium of claim 16 where the Lewis acid of the composition is selected from the group consisting of AlCl 3 , ZnCl 2 , CaCl 2 , acidic clays and acidic polymers or mixtures of these.
Claim 26
Dependent Claim
24 words
A recording medium of claim 16 where the composition includes an effective amount of plasticizer to improve the flexibility or adhesion of the film.
Claim 27
Dependent Claim
25 words
A recording medium of claim 16 where the composition includes an effective amount of a dispersing agent to improve the covering power of the pigment.
Claim 28
Dependent Claim
24 words
A recording medium of claim 16 where the composition includes an effective amount of a thickening agent to control settling of the dispersed ingredients.
Claim 29
Dependent Claim
26 words
A recording medium of claim 16 where the Lewis acid of the composition comprises ZnCl 2 and the composition includes a solvent for the Lewis acid.
Claim 30
Dependent Claim
29 words
A recording medium of claim 16 where the Lewis acid of the composition comprises ZnCl 2 and the composition includes ethanol as a solvent for the ZnCl 2 .
Claim 31
Dependent Claim
178 words
A recording medium of claim 16 where the composition comprises the following ingredients in amounts based on parts by weight of the total weight of the composition: a. from about 80 to about 125 parts by weight of a non-flammable organic solvent having a boiling point between about 60° to about 85° C., b. from about 30 to about 70 parts by weight of a pigment comprising a titanium dioxide, c. from about 3 to about 20 parts by weight of a polymeric film-forming binder material which is soluble in said solvent, d. from about 0.5 to about 15 parts by weight of a Lewis acid selected from the group consisting of AlCl 3 , ZnCl 2 , CaCl 2 , acidic clays and acidic polymers or mixtures of these, e. from 0 to about 10 parts by weight of a plasticizer to improve the flexibility of adhesion of the film, f. from 0 to about 10 parts by weight of a dispersing agent, and g. from 0 to about 5 parts by weight of a thickening agent.
Claim 32
Dependent Claim
150 words
A recording medium of claim 16 where the composition comprises the following ingredients in amounts based on parts by weight of the total weight of the composition: a. from about 80 to about 125 parts by weight 1,1,1-trichloroethane, b. from about 30 to about 70 parts by weight of a titanium dioxide, c. from about 3 to about 20 parts by weight of a vinyl toluene acrylic polymer, d. from about 0.5 to about 15 parts by weight of ZnCl 2 , e. from 0 to about 10 parts by weight of a plasticizer to improve the flexibility or adhesion of the film, f. from 0 to about 10 parts by weight of a dispersing agent, g. from 0 to about 5 parts by weight of a thickening agent, and h. from about 0.5 to about 15 parts by weight of ethanol as a solvent for the ZnCl 2 .
References Cited (Backward Citations)
US3852089A
Cited
US3997498A
Cited
US4422671A
Cited
JPS60244593A
Cited
JPS60260389A
Cited
US4773778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |