Patent US4596996A successfully refreshed from Google Patents.
US4596996A
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US
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Pressure-sensitive recording sheet
Assignee: WTA Inc
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Filing: 1985-02-11
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Granted: 1986-06-24
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Expires: 2005-02-11
Abstract
Abstract Disclosed is a pressure-sensitive recording material which comprises a support having thereon a two-layer microcapsule coating wherein the microcapsule layer adjacent to the support contains no color former. Such recording material makes possible a substantial decrease in quantity of color former required.
Inventors
- 👤 Robert W. Sandberg
- 👤 Bruce W. Brockett
- 👤 Kristi A. Blythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:35
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
49 words
A pressure-sensitive recording material comprising a support having bound on the surface thereof a two layer microcapsule coating, wherein the microcapsules in the layer adjacent to the support contain liquid core material but no color former and the microcapsules in the other layer contain a liquid color former solution.
Claim 2
Dependent Claim
49 words
A pressure-sensitive recording material comprising a support having bound on the surface thereof a two layer microcapsule coating, wherein the microcapsules in the layer adjacent to the support contain liquid core material but no color former and the microcapsules in the other layer contain a liquid color former solution.
Claim 3
Dependent Claim
21 words
The recording material of claim 1, wherein the color former of the microcapsule layer containing same is a basic chromogenic material.
Claim 4
Dependent Claim
20 words
The recording material of claim 2 wherein the layer containing the color former solution further comprises a particulate starch material.
Claim 5
Dependent Claim
22 words
The recording material of claim 3 wherein the microcapsule layer adjacent to the support is bound by means of a latex binder.
Claim 6
Dependent Claim
13 words
The recording material of claim 1 or 3 wherein the support is paper.
Claim 7
Dependent Claim
35 words
The recording material of claim 5 wherein the mean particle size of the microcapsules in the layer adjacent to the support is less than the mean particle size of the microcapsules in the other layer.
Claim 8
Dependent Claim
20 words
The recording meaterial of claim 6 wherein the microcapsule in the layer adjacent to the support contains an aliphatic hydrocarbon.
Claim 9
Dependent Claim
46 words
A pressure-sensitive recording material comprising a support having bound on the surface thereof a first composition comprising microcapsules containing liquid core material but no color former, and a second composition comprising microcapsules containing a liquid color former solution bound on the surface of the first composition.
Claim 10
Dependent Claim
46 words
A pressure-sensitive recording material comprising a support having bound on the surface thereof a first composition comprising microcapsules containing liquid core material but no color former, and a second composition comprising microcapsules containing a liquid color former solution bound on the surface of the first composition.
Claim 11
Dependent Claim
15 words
The recording material of claim 8, wherein the color former is a basic chromogenic material.
Claim 12
Dependent Claim
16 words
The recording material of claim 9, wherein the second composition further comprises a particulate starch material.
Claim 13
Dependent Claim
18 words
The recording material of claim 10, wherein the first composition is bound by means of a latex binder.
Claim 14
Dependent Claim
13 words
The recording material of claim 8 or 10 wherein the support is paper.
Claim 15
Dependent Claim
32 words
The recording material of claim 12 wherein the mean particle size of the microcapsules in the first composition is less than the mean particle size of the microcapsules in the second composition.
Claim 16
Dependent Claim
17 words
The recording material of claim 13 wherein the microcapsule in the first composition contains an aliphatic hydrocarbon.
Claim 17
Dependent Claim
59 words
A pressure-sensitive recording material comprising a support having bound on the surface thereof a first composition comprising microcapsules containing liquid core material, but no color former, and a binder material, and a second composition comprising microcapsules containing a liquid, basic chromogenic color former solution, a binder material and a stilt material bound on the surface of the first composition.
Claim 18
Dependent Claim
59 words
A pressure-sensitive recording material comprising a support having bound on the surface thereof a first composition comprising microcapsules containing liquid core material, but no color former, and a binder material, and a second composition comprising microcapsules containing a liquid, basic chromogenic color former solution, a binder material and a stilt material bound on the surface of the first composition.
Claim 19
Dependent Claim
15 words
The recording material of claim 15, wherein the stilt material is a particulate starch material.
Claim 20
Dependent Claim
17 words
The recording material of claim 16, wherein the binder material of the first composition is a latex.
Claim 21
Dependent Claim
13 words
The recording material of claim 15 or 16 wherein the support is paper.
Claim 22
Dependent Claim
32 words
The recording material of claim 18 wherein the mean particle size of the microcapsules in the first composition is less than the mean particle size of the microcapsules in the second composition.
Claim 23
Dependent Claim
17 words
The recording material of claim 18 wherein the microcapsule in the first composition contains an aliphatic hydrocarbon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |