US4368497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cassette
Assignee: Olympus Corp
•
Filing: 1980-12-29
•
Granted: 1983-01-11
•
Expires: 2000-12-29
Abstract
Abstract A tape cassette includes liner sheets which are flexed toward the inner surface of the adjacent cassette half in the region around openings, formed therein to permit tape hub drive shafts to extend therethrough, a central region adjacent to the front edge and at the opposite ends of the front edge, thereby allowing the liner sheets to control the position of a magnetic tape to stabilize the tape running and to prevent a deformed tape winding.
Inventors
- 👤 Hideo Shirako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:53
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08785; G11B23/08757; G11B23/08764; G11B23/08771
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
A tape cassette comprising: a pair of tape hubs including openings which are engaged by tape hub drive shafts and rotatably disposed in tape hub locating apertures which are formed in a pair of upper and lower cassette halves at laterally spaced positions, said tape hubs having upper and lower surfaces separated by tape receiving surfaces; a pair of liner sheets disposed along the respective inner surfaces of the upper and lower cassette halves and having a pair of openings formed therein at laterally spaced position, the openings being of a diameter which is slightly less than the diameter of an outer peripheral surface of the respective tape hubs on which a tape is disposed, the openings permitting the drive shafts to extend therethrough; and ribs formed on the inner surface of the upper and lower cassette halves in alignment with each other, the spacing between the ribs being less than the height of tape receiving surfaces of the tape hubs so that portions of the liner sheets which are located around the openings formed therein and overlap said upper and lower surfaces of said tape hubs are thereby flexed toward the inner surface of the adjacent cassette half in the region of the tape hub.
Claim 2
Dependent Claim
206 words
A tape cassette comprising: a pair of tape hubs including openings which are engaged by tape hub drive shafts and rotatably disposed in tape hub locating apertures which are formed in a pair of upper and lower cassette halves at laterally spaced positions, said tape hubs having upper and lower surfaces separated by tape receiving surfaces; a pair of liner sheets disposed along the respective inner surfaces of the upper and lower cassette halves and having a pair of openings formed therein at laterally spaced position, the openings being of a diameter which is slightly less than the diameter of an outer peripheral surface of the respective tape hubs on which a tape is disposed, the openings permitting the drive shafts to extend therethrough; and ribs formed on the inner surface of the upper and lower cassette halves in alignment with each other, the spacing between the ribs being less than the height of tape receiving surfaces of the tape hubs so that portions of the liner sheets which are located around the openings formed therein and overlap said upper and lower surfaces of said tape hubs are thereby flexed toward the inner surface of the adjacent cassette half in the region of the tape hub.
Claim 3
Dependent Claim
142 words
A tape cassette formed by a pair of upper and lower cassette halves disposed in opposing relationship with each other, comprising a tape pad supporting leaf spring disposed centrally toward the front side of the cassette and within the latter; a pair of upper and lower liner sheets disposed along the inner surface of the upper and lower cassette halves and having extensions for abutment against the both edge faces of the tape pad supporting leaf spring; and ribs formed on the inner surface of the upper and lower cassette halves in alignment with each other, the spacing between the ribs being less than the height of the leaf spring so that a median region of the front edge portion of the liner sheets are flexed toward the inner surface of the adjacent cassette half in the region of the leaf spring.
Claim 4
Dependent Claim
142 words
A tape cassette formed by a pair of upper and lower cassette halves disposed in opposing relationship with each other, comprising a tape pad supporting leaf spring disposed centrally toward the front side of the cassette and within the latter; a pair of upper and lower liner sheets disposed along the inner surface of the upper and lower cassette halves and having extensions for abutment against the both edge faces of the tape pad supporting leaf spring; and ribs formed on the inner surface of the upper and lower cassette halves in alignment with each other, the spacing between the ribs being less than the height of the leaf spring so that a median region of the front edge portion of the liner sheets are flexed toward the inner surface of the adjacent cassette half in the region of the leaf spring.
Claim 5
Dependent Claim
127 words
A tape cassette formed by a pair of upper and lower cassette havles, comprising: a pair of upper and lower liner sheets disposed along the inner surface of the respective cassette halves; upper and lower abutment pins formed on the inner surface of the upper and lower cassette havles and having abutment surfaces on which said liner sheets bear to cause part of the liner sheets to be directed toward the inner surface of the adjacent cassette half; and ribs formed on the inner surface of the upper and lower cassette havles and projecting beyond the abutment surfaces of the abutment pins so that part of the liner sheets is flexed toward the inner surface of the adjacent cassette half in the region of the abutment pin.
Claim 6
Dependent Claim
127 words
A tape cassette formed by a pair of upper and lower cassette havles, comprising: a pair of upper and lower liner sheets disposed along the inner surface of the respective cassette halves; upper and lower abutment pins formed on the inner surface of the upper and lower cassette havles and having abutment surfaces on which said liner sheets bear to cause part of the liner sheets to be directed toward the inner surface of the adjacent cassette half; and ribs formed on the inner surface of the upper and lower cassette havles and projecting beyond the abutment surfaces of the abutment pins so that part of the liner sheets is flexed toward the inner surface of the adjacent cassette half in the region of the abutment pin.
Claim 7
Dependent Claim
29 words
A tape cassette according to claim 3 in which the part of the liner sheet comprises the both lateral ends of the front edge portion of the liner sheets.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |