US4178405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic belt with conductive coating
Assignee: Genicom Corp
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Filing: 1977-10-07
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Granted: 1979-12-11
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Expires: 1997-10-07
Abstract
Abstract A magnetic belt for magnetic printing and the like has a relatively low surface resistivity provided by a conductive surface layer to eliminate unacceptable toner background.
Inventors
- 👤 Ami E. Berkowitz
- 👤 Joseph A. Lahut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/104; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T442/00; Y10T442/20; Y10T442/2418; Y10T442/2426
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A magnetic belt for use in a magnetic printer having means for magnetically recording information on said belt, comprising: a backing layer having opposed first and second surfaces, said first surface being positioned adjacent to said magnetic recording means when said belt is in use; a recording layer having first and second opposed surfaces and fabricated of ferromagnetic material, the first surface of said recording layer being in abutment with said second surface of said backing layer; and a layer of conductive material, including carbon particles supported in a resin, fabricated upon said second surface of said recording layer furthest from said backing layer and providing said second surface of said recording layer with a surface resistivity of less than 10 9 ohms-per-square.
Claim 2
Dependent Claim
123 words
A magnetic belt for use in a magnetic printer having means for magnetically recording information on said belt, comprising: a backing layer having opposed first and second surfaces, said first surface being positioned adjacent to said magnetic recording means when said belt is in use; a recording layer having first and second opposed surfaces and fabricated of ferromagnetic material, the first surface of said recording layer being in abutment with said second surface of said backing layer; and a layer of conductive material, including carbon particles supported in a resin, fabricated upon said second surface of said recording layer furthest from said backing layer and providing said second surface of said recording layer with a surface resistivity of less than 10 9 ohms-per-square.
Claim 3
Dependent Claim
21 words
A magnetic belt as set forth in claim 1, wherein said surface resistivity is on the order of 10 6 ohms-persquare.
Claim 4
Dependent Claim
31 words
A magnetic belt as set forth in claim 1, wherein said backing layer is formed of a plastic resin material; and said recording layer is formed of a ferromagnetic oxide material.
Claim 5
Dependent Claim
23 words
A magnetic belt as set forth in claim 1, wherein said recording layer has a value of remanence in excess of 1400 gauss.
Claim 6
Dependent Claim
23 words
A magnetic belt as set forth in claim 1, wherein said conductive coating layer has a thickness on the order of 0.1 milli-inches.
Claim 7
Dependent Claim
24 words
A magnetic belt as set forth in claim 5, wherein said recording layer has a thickness from about 0.55 milli-inches to about 0.75 milli-inches.
Claim 8
Dependent Claim
20 words
A magnetic belt as set forth in claim 1, wherein said backing layer has a thickness of about 0.8 milli-inches.
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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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |