US4448445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive record system
Assignee: Wallace Computer Services Inc
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Filing: 1982-02-10
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Granted: 1984-05-15
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Expires: 2002-02-10
Abstract
Abstract A pressure sensitive copy system comprising a plurality of sheets in superposed relationship in which at least one sheet comprises a semi-translucent support bearing either an autogenous layer or a color-developer layer and at least one other sheet comprises a support bearing the other of such layers. The autogenous layer comprises microcapsules and electron-acceptor material in which the microcapsules contain chromogenic material sufficient to form a visible image in the autogenous layer and in the color-developer layer.
Inventors
- 👤 John C. H. Chang
- 👤 Theodore Dimitriou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808; Y10T428/31812; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
A pressure-sensitive record system comprising a plurality of sheets in superposed relationship, wherein at least one of said sheets comprises a support bearing an autogenous layer comprising microscopic pressure-rupturable capsules and an electron-acceptor material; at least one other of said sheets comprises a support bearing a color-developer layer comprising electron-acceptor material; said autogenous layer and said color-developer layer being in direct, superimposed contact; at least one of said supports being a semi-translucent support; said capsules containing chromogenic material in amount sufficient to form a visible colored marking in said autogenous layer and to transfer to said color-developing layer to form a visible colored marking therein; said semi-translucent support being sufficiently translucent that the colored marking formed on one side of said semi-translucent support is visible from the other side of said semi-translucent support with the naked eye.
Claim 2
Dependent Claim
137 words
A pressure-sensitive record system comprising a plurality of sheets in superposed relationship, wherein at least one of said sheets comprises a support bearing an autogenous layer comprising microscopic pressure-rupturable capsules and an electron-acceptor material; at least one other of said sheets comprises a support bearing a color-developer layer comprising electron-acceptor material; said autogenous layer and said color-developer layer being in direct, superimposed contact; at least one of said supports being a semi-translucent support; said capsules containing chromogenic material in amount sufficient to form a visible colored marking in said autogenous layer and to transfer to said color-developing layer to form a visible colored marking therein; said semi-translucent support being sufficiently translucent that the colored marking formed on one side of said semi-translucent support is visible from the other side of said semi-translucent support with the naked eye.
Claim 3
Dependent Claim
17 words
The record system of claim 1 wherein the support bearing the autogenous layer is said semi-translucent support.
Claim 4
Dependent Claim
17 words
The record system of claim 1 wherein the support bearing the color-developer layer is said semi-translucent support.
Claim 5
Dependent Claim
41 words
The record system of claim 1 wherein the amount of chromogenic material in said microcapsules is from about 2 parts by weight to about 20 parts by weight per 100 parts by weight of the electron-acceptor material in the autogenous layer.
Claim 6
Dependent Claim
36 words
The record system of claim 1 wherein said semi-translucent support was prepared by treating a paper web with a translucentizing agent at a weight of from about 0.1 to about 1.0 pound per 1,300 square feet.
Claim 7
Dependent Claim
31 words
The record system of claim 5 wherein said translucentizing agent is applied to a paper web at a weight of from about 0.1 to about 0.5 pound per 1,300 square feet.
Claim 8
Dependent Claim
14 words
The record system of claim 1 wherein said autogenous layer contains a color suppressant.
Claim 9
Dependent Claim
20 words
The record system of claim 1 wherein selected areas of the semi-translucent support have been treated with a translucentizing agent.
Claim 10
Dependent Claim
18 words
The record system of claim 1 wherein the entire semi-translucent support has been treated with a translucentizing agent.
Claim 11
Dependent Claim
24 words
The record system of claim 1 wherein said color developer layer is coated in selected areas of said support bearing said color developer layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |