US3984870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic video recording and reproducing apparatus having a tape threading mechanism
Assignee: Sony Corp
•
Filing: 1974-11-13
•
Granted: 1976-10-05
•
Expires: 1994-11-13
Abstract
Abstract A magnetic video recording and reproducing apparatus has a magazine receiving section for receiving a tape magazine, a rotary magnetic head assembly, and a tape threading assembly that includes a flat annular rotatable member surrounding the rotary head assembly and partially underlying a magazine received in the receiving section. Means including a hook and a roller are provided on the annular rotatable member to engage a tape in the magazine and, as the rotatable member is rotated, draw it around the rotary magnetic head assembly to a position where the tape is pinched between the roller and a capstan and the tape lies against the rotary head assembly in position to be scanned. Guide pins, cam actuated from the rotatable annular member, move into or out of tape engaging positions as the member rotates.
Inventors
- 👤 Makoto Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:14
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/665; G11B15/6653; G11B15/6655
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
295 words
In a magnetic video recording and/or reproducing apparatus that includes a cylindrical tape guide drum having at least one rotary magnetic head moved in a circular path substantially along the periphery of said drum, a tape magazine having at least one reel around which a magnetic tape is wound, a magazine loading means having a reel drive member for driving said reel and a tape magazine support member for supporting said tape magazine in a predetermined position, a tape threading means having a rotatable support member and a tape drawing member, said rotatable support member being rotatably movable around said cylindrical tape guide drum between a tape loading and a tape operating position and said tape drawing member being mounted on said rotatable support member for drawing out said magnetic tape from said magazine loaded on said magazine loading means, and a first position defining means and a second position defining means for defining the wrapping position of a looped tape extended around the periphery of said guide drum in response to the rotational movement of said tape threading means, the improvement which comprises: a. a main chasis having a flat mounting area, tape magazine support means and reel drive means; and b. a sub-chassis mountable on said flat mounting area of the main chassis and having a first mounting area for receiving and supporting said cylindrical tape guide drum at an inclined position with respect to the main chassis, a second mounting area carrying tape positioning means defining the path of the tape around the guide drum, and a third mounting area supporting means carrying and guiding said rotatable support in its tape threading movement along a path inclined to said main chassis at one inclination greater than that of said tape guide drum.
Claim 2
Dependent Claim
295 words
In a magnetic video recording and/or reproducing apparatus that includes a cylindrical tape guide drum having at least one rotary magnetic head moved in a circular path substantially along the periphery of said drum, a tape magazine having at least one reel around which a magnetic tape is wound, a magazine loading means having a reel drive member for driving said reel and a tape magazine support member for supporting said tape magazine in a predetermined position, a tape threading means having a rotatable support member and a tape drawing member, said rotatable support member being rotatably movable around said cylindrical tape guide drum between a tape loading and a tape operating position and said tape drawing member being mounted on said rotatable support member for drawing out said magnetic tape from said magazine loaded on said magazine loading means, and a first position defining means and a second position defining means for defining the wrapping position of a looped tape extended around the periphery of said guide drum in response to the rotational movement of said tape threading means, the improvement which comprises: a. a main chasis having a flat mounting area, tape magazine support means and reel drive means; and b. a sub-chassis mountable on said flat mounting area of the main chassis and having a first mounting area for receiving and supporting said cylindrical tape guide drum at an inclined position with respect to the main chassis, a second mounting area carrying tape positioning means defining the path of the tape around the guide drum, and a third mounting area supporting means carrying and guiding said rotatable support in its tape threading movement along a path inclined to said main chassis at one inclination greater than that of said tape guide drum.
Claim 3
Dependent Claim
24 words
A magnetic video recording and/or reproducing apparatus according to claim 1, in which said rotatable support member is in the form of a ring.
Claim 4
Dependent Claim
84 words
A magnetic video recording and/or reproducing apparatus according to claim 2, in which said ring is rotatably mounted on said third mounting surface and is rotated with a center which is eccentrically located with respect to the axis of said cylindrical tape guide drum in the direction toward said reel so as to provide a relatively large area between said ring and the drum surface of said cylindrical tape guide drum which is faced to said tape magazine loaded on said magazine loading means.
Claim 5
Dependent Claim
44 words
In a magnetic video recording and/or reproducing apparatus according to claim 3, said improvement further comprises a capstan and a pinch roller adjacent thereto by which said magnetic tape is transported, said capstan being mounted on said sub-chassis and located in said large area.
Claim 6
Dependent Claim
38 words
In a magnetic video recording and/or reproducing apparatus according to claim 3, said improvement further comprises a stationary magnetic head mounted on said sub-chassis and located on said large area for reproducing a signal from said magnetic tape.
Claim 7
Dependent Claim
39 words
In a magnetic video recording and/or reproducing apparatus according to claim 3, said improvement further comprised a stationary erase head mounted on said sub-chassis and located in said large area for erasing a recorded signal on said magnetic tape.
Claim 8
Dependent Claim
71 words
A magnetic video recording and/or reproducing apparatus according to claim 1, in which said tape drawing member mounted on said rotatable support member has a curved peripheral surface portion by which said tape is urged toward the tape drawing member mounting portion on said rotatable support member while said tape is drawn out from said magazine loaded on said magazine loading means and is threaded around said cylindrical tape guide drum.
Claim 9
Dependent Claim
133 words
A magnetic video recording and/or reproducing apparatus according to claim 1, in which said magnetic tape housed in said magazine loaded on said magazine loading means is parted from the path of rotation of said rotatable support member, and said tape drawing member mounted on said rotatable support member is movable into and out of said path of rotation, said improvement further comprises means for bringing said tape drawing member outside of said path of rotation while said rotatable support member is rotated into said tape unthreading position and for bringing said tape drawing member inside of said path of rotation while said rotatable support member is rotated into said tape threading position by which magnetic tape is housed into or drawn out from said tape magazine loaded on said magazine loading means.
Claim 10
Dependent Claim
242 words
In magnetic video recording and/or reproducing apparatus according to claim 1, said improvement further comprises: a. a fourth mounting surface formed as one unit body with said mounting surfaces; b. at least one magnetic tape guide means rotatably mounted on said fourth mounting surface; and c. an engaging member mounted on said magnetic tape guide means for engaging said magnetic tape guide means with said rotatable support member by which said tape guide means is rotatably shifted between a stand-up position and a lay-down position while said rotatable support member is rotated between said tape loading position and said tape operating position, said tape guide means extending substantially in an upward direction relative to the imaginary plane of rotation of said rotatable support member in said stant-up position in which said tape guide means is engaged with said looped tape and extending substantially along the imaginary plane of rotation of said support member in said lay-down position in which said tape guide means is released from said looped tape, said tape drawing member for drawing out said looped tape from said tape magazine loaded on said magazine loading means being used for threading one portion of said looped tape around said cylindrical tape guide drum in response to the movement of said tape threading means and said magnetic tape guide means being used for holding another portion of said looped tape away from said cylindrical tape guide drum in said stand-up position.
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |