Patent US3487189A successfully refreshed from Google Patents.
Patent US3915409A successfully refreshed from Google Patents.
US3915409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape cassette
Assignee: TDK Corp
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Filing: 1974-05-20
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Granted: 1975-10-28
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Expires: 1994-05-20
Abstract
Abstract A cassette tape wind-up control for preventing run-off of the tape when switching from a fast winding mode to a ''''play'''' mode which comprises a pressure arm for pressing an external surface of tape being wound with a free end of the arm, a tension arm for contacting a surface of the tape with a free end of the arm and a spring connecting the other end of the pressure arm with the other end of the tension arm.
Inventors
- 👤 Takateru Satou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:10
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A cassette tape having windup control means comprising: a pressure arm for pressing an external surface of a tape being wound upon a reel with a free end of the arm; a tension arm for contacting a free-floating portion of said tape with a free end of said tension arm; and spring means connecting the other end of said pressure arm with the other end of said tension arm.
Claim 2
Dependent Claim
69 words
A cassette tape having windup control means comprising: a pressure arm for pressing an external surface of a tape being wound upon a reel with a free end of the arm; a tension arm for contacting a free-floating portion of said tape with a free end of said tension arm; and spring means connecting the other end of said pressure arm with the other end of said tension arm.
Claim 3
Dependent Claim
181 words
A cAssette tape comprising: a case; a feeding reel in said case for a tape; a first pressure arm for pressing an external surface of a tape being fed from said feeding reel with a free end of the first pressure arm; a first tension arm in said case for contacting a free-floating portion of said tape being fed from said feeding reel with a free end of said first tension arm; a first spring connecting the other end of said first pressure arm with the other end of said first tension arm; a receiving reel for having a tape wound thereon from said feeding reel; a second pressure arm pressing an external surface of the tape being wound upon said receiving reel with a free end of said second pressure arm; a second tension arm for contacting a free-floating portion of the tape being wound upon said receiving reel with a free end of said second tension arm; and a second spring connecting the other end of said second pressure arm with the other end of said second tension arm.
Claim 4
Dependent Claim
181 words
A cAssette tape comprising: a case; a feeding reel in said case for a tape; a first pressure arm for pressing an external surface of a tape being fed from said feeding reel with a free end of the first pressure arm; a first tension arm in said case for contacting a free-floating portion of said tape being fed from said feeding reel with a free end of said first tension arm; a first spring connecting the other end of said first pressure arm with the other end of said first tension arm; a receiving reel for having a tape wound thereon from said feeding reel; a second pressure arm pressing an external surface of the tape being wound upon said receiving reel with a free end of said second pressure arm; a second tension arm for contacting a free-floating portion of the tape being wound upon said receiving reel with a free end of said second tension arm; and a second spring connecting the other end of said second pressure arm with the other end of said second tension arm.
Claim 5
Dependent Claim
31 words
A cassette tape according to claim 2, wherein the free end of at least one of the tension arms has a flanged surface for holding and guiding the tape contacted thereby.
Claim 6
Dependent Claim
23 words
A cassette tape according to claim 2, wherein the free end of at least one of the tension arms has a smooth surface.
Claim 7
Dependent Claim
27 words
A cassette tape according to claim 2, wherein the free end of at least one of the tension arms has a roller thereon for contacting the tape.
Claim 8
Dependent Claim
29 words
A cassette tape according to claim 2, wherein said first and second springs are spring rings from which the first and second tension arms and pressure arms are extended.
Claim 9
Dependent Claim
26 words
A cassette tape according to claim 2, wherein the pressure of the pressure arm increases according to an increase of the diameter of the wound tape.
Claim 10
Dependent Claim
40 words
A cassette tape according to claim 2, wherein said first and second springs connecting said first and second pressure arms and tension arms are pivoted to respective poles mounted in said case so as to permit rotation and sliding movement.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |