Patent US4191345A successfully refreshed from Google Patents.
US4191345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cassette
Assignee: TDK Corp
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Filing: 1978-08-08
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Granted: 1980-03-04
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Expires: 1998-08-08
Abstract
Abstract A tape cassette comprises a tape guide having a cylindrical surface formed by hard chromium plating or nickel plating. The tape guide is a cylindrical plate having a slit parallel to the axis. The cylindrical tape guide has a groove at one end of the guide and is fitted to a post having a projection mounted on a half-case under connecting the groove of the guide to the projection of the post to contact the tape with the surface formed by the hard chromium plating or nickel plating.
Inventors
- 👤 Takateru Sato
- 👤 Shigemasa Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:18
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
In a tape cassette comprising first and second half-cases, a reel disposed therein, a tape fed from said reel and a cylindrical tape guide for guiding tape fed from said reel, an improvement therein which comprises: said cylindrical tape guide includes a surface layer formed by a hard chromium plating or nickel plating wherein said cylindrical tape guide includes a slit formed in the axial direction thereof and further comprises a plastic substrate upon which said surface layer is formed.
Claim 2
Dependent Claim
80 words
In a tape cassette comprising first and second half-cases, a reel disposed therein, a tape fed from said reel and a cylindrical tape guide for guiding tape fed from said reel, an improvement therein which comprises: said cylindrical tape guide includes a surface layer formed by a hard chromium plating or nickel plating wherein said cylindrical tape guide includes a slit formed in the axial direction thereof and further comprises a plastic substrate upon which said surface layer is formed.
Claim 3
Dependent Claim
110 words
In a tape cassette comprising first and second half-cases, a reel disposed therein, a tape fed from said reel and a cylindrical tape guide for guiding tape fed from said reel, an improvement therein which comprises; said cylindrical tape guide includes a surface layer formed by a hard chromium plating or nickel plating, said cylindrical tape guide comprising a metal plate upon which said surface layer is formed and which is bent into a cylindrical shape; a post extending from said first half-case; and a projection extending from said post wherein said cylindrical tape guide includes a groove in at least one end thereof which is fitted to said projection.
Claim 4
Dependent Claim
110 words
In a tape cassette comprising first and second half-cases, a reel disposed therein, a tape fed from said reel and a cylindrical tape guide for guiding tape fed from said reel, an improvement therein which comprises; said cylindrical tape guide includes a surface layer formed by a hard chromium plating or nickel plating, said cylindrical tape guide comprising a metal plate upon which said surface layer is formed and which is bent into a cylindrical shape; a post extending from said first half-case; and a projection extending from said post wherein said cylindrical tape guide includes a groove in at least one end thereof which is fitted to said projection.
Claim 5
Dependent Claim
101 words
In a tape cassette comprising first and second half-cases, a reel disposed therein, a tape fed from said reel and a cylindrical tape guide for guiding tape fed from said reel, an improvement therein which comprises; said tape guide includes a surface layer formed by a hard chromium plating or nickel plating, wherein said cylindrical tape guide further includes a slit formed in the axial direction thereof; a post extending from said first half-case; and a projection extending from said post wherein said cylindrical tape guide includes a groove in at least one end thereof which is fitted to said projection.
Claim 6
Dependent Claim
101 words
In a tape cassette comprising first and second half-cases, a reel disposed therein, a tape fed from said reel and a cylindrical tape guide for guiding tape fed from said reel, an improvement therein which comprises; said tape guide includes a surface layer formed by a hard chromium plating or nickel plating, wherein said cylindrical tape guide further includes a slit formed in the axial direction thereof; a post extending from said first half-case; and a projection extending from said post wherein said cylindrical tape guide includes a groove in at least one end thereof which is fitted to said projection.
References Cited (Backward Citations)
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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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |