Patent US4636818A successfully refreshed from Google Patents.
US4636818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonless system including solvent-only microcapsules
Assignee: Moore Business Forms Inc
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Filing: 1985-06-05
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Granted: 1987-01-13
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Expires: 2005-06-05
Abstract
Abstract A carbonless system having improved imaging characteristics by the use of microcapsules containing only solvent is disclosed. The solvent-only capsules are disposed within a carbonless system to enhance the resulting image without the use of additional dye precursor.
Inventors
- 👤 Richard J. Jerabek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:12
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
138 words
In a carbonless copying system having a recording substrate, first and second mark-forming components capable of reacting with each other to produce a colored reaction product, and microcapsules having generally continuous walls encapsulating a first fill material, the first fill material comprising a solution or suspension containing the first mark-forming component, the improvement in combination therewith comprising, microcapsules having generally continuous walls encapsulating a second fill material, the second fill material consisting of solvent capable of dissolving either the first or the second mark-forming component or both, the microcapsules encapsulating the first fill material, the microcapsules encapsulating the second fill material, and the second mark-forming component being arranged in juxtaposed pressure-sensitive contact with respect to one another such that the application of marking pressure upon the carbonless system causes a colored marked to form on the recording substrate.
Claim 2
Dependent Claim
138 words
In a carbonless copying system having a recording substrate, first and second mark-forming components capable of reacting with each other to produce a colored reaction product, and microcapsules having generally continuous walls encapsulating a first fill material, the first fill material comprising a solution or suspension containing the first mark-forming component, the improvement in combination therewith comprising, microcapsules having generally continuous walls encapsulating a second fill material, the second fill material consisting of solvent capable of dissolving either the first or the second mark-forming component or both, the microcapsules encapsulating the first fill material, the microcapsules encapsulating the second fill material, and the second mark-forming component being arranged in juxtaposed pressure-sensitive contact with respect to one another such that the application of marking pressure upon the carbonless system causes a colored marked to form on the recording substrate.
Claim 3
Dependent Claim
29 words
The carbonless copying system of claim 1 wherein the first mark-forming component is a colorless dye precursor and the second mark-forming component is an acidic clay or phenolic resin.
Claim 4
Dependent Claim
23 words
The carbonless copying system of claim 2 wherein the second fill material is an organic solvent capable of dissolving the colorless dye precursor.
Claim 5
Dependent Claim
31 words
The carbonless copying system of claim 3 wherein the microcapsules encapsulating the second fill material and the second mark-forming component are coated over at least a portion of the recording substrate.
Claim 6
Dependent Claim
31 words
The carbonless copying system of claim 4 additionally comprising a transfer substrate wherein the microcapsules encapsulating the first fill material are coated over at least a portion of the transfer substrate.
Claim 7
Dependent Claim
40 words
The carbonless copying system of claim 3 additionally comprising a transfer substrate wherein the microcapsules encapsulating the second fill material and the microcapsules encapsulating the first fill material are both coated over at least a portion of the transfer substrate.
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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) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |