US4459055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink ribbon which makes illegible the contents of information as transferred
Assignee: Canon Inc
•
Filing: 1982-07-19
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Granted: 1984-07-10
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Expires: 2002-07-19
Abstract
Abstract An ink ribbon for a printing device comprises a substrate of a long thin web of a synthetic resin film having a solid ink coated on one surface thereof, the color of the substrate being the same as that of the solid ink. After the ink ribbon is used, the negative impressions left from the transfer of information to a printing sheet will be illegible.
Inventors
- 👤 Osamu Asakura
- 👤 Mineo Nozaki
- 👤 Masasumi Nagashima
- 👤 Yoshio Uchikata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; B41J; B41J31/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
An ink ribbon, comprising: a substrate in web-form made of a flexible film; and an ink coated on one surface of said substrate, said substrate being of the same color as that of said ink.
Claim 2
Dependent Claim
35 words
An ink ribbon, comprising: a substrate in web-form made of a flexible film; and an ink coated on one surface of said substrate, said substrate being of the same color as that of said ink.
Claim 3
Dependent Claim
19 words
An ink ribbon as set forth in claim 1, wherein said substrate is made of a synthetic resin film.
Claim 4
Dependent Claim
34 words
An ink ribbon as set forth in claim 1, wherein said substrate is made of a thin metal sheet, one surface of which is colored in the same color as that of the ink.
Claim 5
Dependent Claim
22 words
An ink ribbon as set forth in claim 1, wherein said ink consists essentially of a coloring matter and a fusible substance.
Claim 6
Dependent Claim
21 words
An ink ribbon as set forth in claim 4, wherein said coloring matter contains a substance which forms color upon heating.
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |