US4790676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printer ribbon and film used for preparation thereof
Assignee: Resonac Holdings Corp
•
Filing: 1987-07-31
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Granted: 1988-12-13
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Expires: 2007-07-31
Abstract
Abstract Disclosed is a film for a printer ribbon, which is made of a resin composition comprising, 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g and a density of 0.94 to 0.96 g/cm 3 . The film is made by the T-die-chill roll method wherein a good stability at both ends of the extruded molten resin film is maintained to prevent the occurrence of an uneven thickness or formation of wrinkles, and wherein undesirable engulfment of air between the molten resin film and the chill roll is avoided.
Inventors
- 👤 Makoto Karatsu
- 👤 Sumio Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:42
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A film for a printer ribbon, which is made of a resin composition comprising, 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g but smaller than 3.5 g and a density of 0.94 to 0.96 g/cm 3 , said film having a thickness of 8 to 20 μm.
Claim 2
Dependent Claim
66 words
A film for a printer ribbon, which is made of a resin composition comprising, 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g but smaller than 3.5 g and a density of 0.94 to 0.96 g/cm 3 , said film having a thickness of 8 to 20 μm.
Claim 3
Dependent Claim
63 words
A film for a printer ribbon according to claim 1, wherein the high-density polyethylene has a melt index of 2 to 10 g/10 min. and a density of 0.94 to 0.97 g/cm 3 and the low-density polyethylene has a melt index of 0.5 to 25 g/10 min. and a density of at least 0.916 g/cm 3 but less than 0.94 g/cm 3 .
Claim 4
Dependent Claim
18 words
A film for a printer ribbon according to claim 1, which is made by the T-die-chill roll method.
Claim 5
Dependent Claim
78 words
A printer ribbon comprising a substrate film and a printing ink coating formed on the film, said film being made of a resin composition comprising 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g but smaller than 3.5 g and a density of 0.94 to 0.96 g/cm 3 , and said film having a thickness of 8 to 20 μm.
Claim 6
Dependent Claim
78 words
A printer ribbon comprising a substrate film and a printing ink coating formed on the film, said film being made of a resin composition comprising 55 to 95% by weight of high-density polyethylene and 5 to 45% by weight of low-density polyethylene and having a melt tension of at least 1.4 g but smaller than 3.5 g and a density of 0.94 to 0.96 g/cm 3 , and said film having a thickness of 8 to 20 μm.
Claim 7
Dependent Claim
60 words
A printer ribbon according to claim 4, wherein the high-density polyethylene has a melt index of 2 to 10 g/10 min. and a density of 0.94 to 0.97 g/cm 3 and the low-density polyethylene has a melt index of 0.5 to 25 g/10 min. and a density of at least 0.916 g/cm 3 but less than 0.94 g/cm 3 .
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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) | 1991-12-13 | 1992-06-13 | 1992-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-13 | 1996-06-13 | 1996-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-13 | 2000-06-13 | 2000-12-13 | $7700.00 | Window Closed / Lapsed |