US4796135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two layered tape pad for a magnetic tape cassette
Assignee: Fujifilm Holdings Corp
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Filing: 1987-04-17
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Granted: 1989-01-03
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Expires: 2007-04-17
Abstract
Abstract In a magnetic recording tape cassette, a tape pad to be urged in contact with a magnetic head of a tape-recorder with the intervention of a magnetic tape is secured to a resilient metal strip. The tape pad is composed of at least one layer of a porous synthetic resin material. The tape contacting surface of the pad is impregnated with a lubricant and/or an anti-static agent. Preferably, the pad is impregnated on the back surface thereof with an adhesive to ensure firm adhesion to the resilient metal strip.
Inventors
- 👤 Kengo Oishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:20
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757; G11B23/08771
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A tape pad for a magnetic recording tape cassette secured to a resilient strip-like member supported in a cassette casing to be urged on a magnetic head of a tape-recorder with the intervention of a magnetic tape therebetween, said pad comprising two layers including a surface layer which is to be put into contact with said magnetic tape and which is made of a porous synthetic resin material impregnated with at least one of a lubricant and an anti-static agent and, another layer which is to be adhered to said resilient strip-like member and which is impregnated with an adhesive.
Claim 2
Dependent Claim
100 words
A tape pad for a magnetic recording tape cassette secured to a resilient strip-like member supported in a cassette casing to be urged on a magnetic head of a tape-recorder with the intervention of a magnetic tape therebetween, said pad comprising two layers including a surface layer which is to be put into contact with said magnetic tape and which is made of a porous synthetic resin material impregnated with at least one of a lubricant and an anti-static agent and, another layer which is to be adhered to said resilient strip-like member and which is impregnated with an adhesive.
Claim 3
Dependent Claim
21 words
A tape pad for a magnetic recording tape cassette as defined in claim 1 wherein said synthetic resin material is polyethylene.
References Cited (Backward Citations)
US3682486A
Cited
GB2018492A
Cited
JPS54155815A
Cited
US4417704A
Cited
JPS60191460A
Cited
US4669020A
Cited
JPS60253077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |