US4533567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonless paper coating formulation
Assignee: NCR Voyix Corp
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Filing: 1983-05-24
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Granted: 1985-08-06
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Expires: 2003-05-24
Abstract
Abstract A carbonless CFB paper includes an aqueous wax emulsion added to the CB coating to act as a barrier between the reactants in the CB coating and in the CF coating, thereby preventing precolor caused by reactants seeping into or penetrating the base paper and reacting with any ruptured capsules in the CB coating.
Inventors
- 👤 Nicola Marinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:17
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/1243
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A method of making pressuresensitive record media with a substrate having front and back surfaces, comprising the steps of providing a color-forming coating material in encapsulated form for the back surface, mixing an aqueous emulsion of wax with the back surface coating material, the aqueous emulsion containing a wax selected from the group having a polyethylene base, coating the substrate on the back surface with the mixture of encapsulated material and wax emulsion in a manner wherein the wax emulsion substantially envelops the encapsulated material, and coating the substrate on the front surface with a material having color-developing phenolic resin as an ingredient thereof whereby the phenolic resin reacts with the color-forming coating material to form an image upon rupture of the encapsulated material.
Claim 2
Independent Claim
124 words
A method of making pressuresensitive record media with a substrate having front and back surfaces, comprising the steps of providing a color-forming coating material in encapsulated form for the back surface, mixing an aqueous emulsion of wax with the back surface coating material, the aqueous emulsion containing a wax selected from the group having a polyethylene base, coating the substrate on the back surface with the mixture of encapsulated material and wax emulsion in a manner wherein the wax emulsion substantially envelops the encapsulated material, and coating the substrate on the front surface with a material having color-developing phenolic resin as an ingredient thereof whereby the phenolic resin reacts with the color-forming coating material to form an image upon rupture of the encapsulated material.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the wax emulsion contains a wax selected from the group having a polyethylene and paraffin base.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the wax emulsion contains a wax selected from the group having a water base wax compound.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein the capsular emulsion contains a soluble wax having from 20% to 25% wax solids in the dry weight condition.
Claim 6
Dependent Claim
25 words
The method of claim 1, wherein the capsular emulsion contains a soluble wax having from 35% to 40% wax solids in the dry weight condition.
References Cited (Backward Citations)
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Cited
US3554781A
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US4171981A
Cited
US4347283A
Cited
US4411451A
Cited
US4435471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |