EP0187024A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tape-draw out mechanism
Assignee: Fujitsu Ltd
•
Filing: 1985-12-18
•
Granted: —
•
Expires: 2005-12-18
Abstract
Abstract A tape draw-out mechanism for drawing a magnetic tape (62) out of a cartridge or cassette (6) operates in such a manner that the return time required for returning the tape to its initial position from a tape drawn-out position is shorter than the time required for moving the tape to the tape drawn-out position from the initial position. A tape draw-out member comprises an arm (10a, 10b) having a tape roller (2a, 2b) at one end and a fulcrum (40a, 40b) at the other end about which the arm is rotatable. The arm has an elongate groove (11 a, 11 b) therein with which a roller (22a, 22b) at the end of a crank member (20a, 20b) engages. The crank member is rotated by a motor (50a, 50b) so that the rotating crank member causes the arm to swing away from, and then towards, the initial tape position, without reversal of the direction of rotation of the crank member. The crank member is so arranged that the angle of rotation of the crank member required for moving the arm to the tape drawn-out position is larger than the angle of rotation required for returning the arm to the initial position from the tape drawn-out position.
Inventors
- 👤 Yujiro Hata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:31
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/665; G11B33/00; G11B33/14; G11B15/6651; G11B15/675; G11B15/68; G11B15/6805; G11B15/681; G11B25/00; G11B25/06; G11B25/063
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
A tape draw-out mechanism comprising a tape draw-out member (3a,3b) to be engaged with a tape (62) between a pair of reels (60,61); and tape draw-out member driving means (50a, 20a, 22a; 50b, 20b, 22b) for moving the tape draw-out member between an initial position and a tape drawn-out position; characterised in that the driving means is operable to move the tape draw-out member such that the return time required for returning the tape draw-out member to the initial position from the tape drawn-out position is shorter than the time required for moving the tape draw-out member to the tape drawn-out position from the initial position.
Claim 2
Dependent Claim
106 words
A tape draw-out mechanism comprising a tape draw-out member (3a,3b) to be engaged with a tape (62) between a pair of reels (60,61); and tape draw-out member driving means (50a, 20a, 22a; 50b, 20b, 22b) for moving the tape draw-out member between an initial position and a tape drawn-out position; characterised in that the driving means is operable to move the tape draw-out member such that the return time required for returning the tape draw-out member to the initial position from the tape drawn-out position is shorter than the time required for moving the tape draw-out member to the tape drawn-out position from the initial position.
Claim 3
Dependent Claim
58 words
A mechanism as claimed in claim 1, characterised in that the tape draw-out member comprises an arm (10a, 10b) having a tape roller (2a,2b) at one end and a fulcrum (40a,40b) at the other end; and the arm is turned by the driving means (50a, 20a, 22a; 50b, 20b, 22b) with the fulcrum as the centre of rotation.
Claim 4
Dependent Claim
53 words
A mechanism as claimed in claim 2, characterised in that two of said arms (10a, 10b) are arranged so that movable ends thereof confront each other; and at the time of rewinding the tape one arm is returned to the initial position and the other arm is held at the tape drawn-out position.
Claim 5
Dependent Claim
220 words
A tape draw-out mechanism comprising a tape draw-out member (3a, 3b) to be engaged with a tape (62) between a pair of reels (60, 61); and tape draw-out member driving means (50a, 20a, 22b; 50b, 20b, 22b) for moving the tape draw-out member between the initial position and a tape drawn-out position; characterised in the driving means is operable to move the tape draw-out member such that the return time required for returning the tape draw-out member to the initial position from the tape drawn-out position is shorter than the time required for moving the tape draw-out member to the tape drawn-out position from the initial position; in that the tape draw-out member comprises an arm (10a, 10b) having a tape engaging portion (2a, 2b) at one end and a fulcrum (40a, 40b) at the other end, the arm being turned by the driving means with the fulcrum as the centre of rotation; in that the arm has an elongate groove (lla, llb) therein; and in that the driving means includes a crank member (20a, 20b) having one end (22a, 22b) engaged with the groove, the crank member being rotatable with a shaft thereof as the centre of rotation by a driving source (50a, 50b), whereby rotation of the driving source is converted to a swinging motion of the arm.
Claim 6
Dependent Claim
220 words
A tape draw-out mechanism comprising a tape draw-out member (3a, 3b) to be engaged with a tape (62) between a pair of reels (60, 61); and tape draw-out member driving means (50a, 20a, 22b; 50b, 20b, 22b) for moving the tape draw-out member between the initial position and a tape drawn-out position; characterised in the driving means is operable to move the tape draw-out member such that the return time required for returning the tape draw-out member to the initial position from the tape drawn-out position is shorter than the time required for moving the tape draw-out member to the tape drawn-out position from the initial position; in that the tape draw-out member comprises an arm (10a, 10b) having a tape engaging portion (2a, 2b) at one end and a fulcrum (40a, 40b) at the other end, the arm being turned by the driving means with the fulcrum as the centre of rotation; in that the arm has an elongate groove (lla, llb) therein; and in that the driving means includes a crank member (20a, 20b) having one end (22a, 22b) engaged with the groove, the crank member being rotatable with a shaft thereof as the centre of rotation by a driving source (50a, 50b), whereby rotation of the driving source is converted to a swinging motion of the arm.
Claim 7
Dependent Claim
21 words
A mechanism as claimed in claim 4, characterised in that the tape engaging portion (2a, 2b) is a freely rotating roller.
Claim 8
Dependent Claim
46 words
A mechanism as claimed in claim 4 or claim 5, characterised in that at the initial position and at the tape drawn-out position, the longitudinal direction of the groove (lla, llb) of the arm is orthogonal to the longitudinal direction of the crank member (20a, 20b).
Claim 9
Dependent Claim
67 words
A mechanism as claimed in any one of claims 4-6, characterised in that the crank member (20a, 20b) is arranged so that the angle of rotation of the crank member required for moving the arm (10a, 10b) to the tape drawn-out position from the initial position is larger than the angle of rotation required for returning the arm to the initial position from the tape drawn-out position.
Claim 10
Dependent Claim
57 words
A mechanism as claimed in claim 7, characterised in that the crank member (20a, 20b) returns the arm (10a, 10b) to the initial position from the tape drawn-out position by rotation of the crank member in the same direction as its direction of rotation for moving the arm to the tape drawn-out position from the initial position.
Claim 11
Dependent Claim
65 words
A mechanism as claimed in any one of claims 4-8, characterised in that the shape of the groove (lla, llb) in the vicinity of a position where the longitudinal direction of the groove is orthogonal to the longitudinal direction of the crank member (20a, 20b) is arcuate along the circular locus of the end portion (22a, 22b) of the crank member engaged with the groove.
Claim 12
Dependent Claim
33 words
A mechanism as claimed in any one of claims 4-8, characterised in that a resilient member (12a, 12b) is arranged along one edge of the groove (lla, llb) in the arm (10a, 10b).
Claim 13
Dependent Claim
57 words
A mechanism as claimed in any one of claims 4-10, characterised in that two of said arms (10a, 10b) are arranged so that the swinging ends thereof confront each other; and at the time of rewinding the tape one arm is returned to the initial position and the other arm is held at the tape drawn-out position.
Claim 14
Dependent Claim
19 words
A mechanism as claimed in any preceding claim, characterised in that the tape (62) is contained in a cassette(6).
Claim 15
Dependent Claim
61 words
A mechanism as claimed in claim 12, characterised in that a plurality of the cassettes (6) are contained in a transportable magazine (107), and the tape draw-out mechanism is assembled in a magnetic tape read/write unit (101) comprising a lift mechanism (136) for moving the magazine vertically and a front loading mechanism (116) for engaging the cassettes with read/write means (114).
Claim 16
Dependent Claim
98 words
A mechanism as claimed in claim 13, characterised in that the magnetic tape read/write unit (100) comprises an opening (139) for inserting the magazine (107), an openable and closable shutter (109) arranged over the opening, a push-out mechanism (110) for pushing out a cassette (133) at a position confronting an inlet of the front loading mechanism (116) from the magazine and for inserting the cassette into the inlet, and a push-return mechanism (115) for pushing and returning a used cassette, which has returned to the inlet of the front loading mechanism after the read/write operation, into the magazine.
Claim 17
Dependent Claim
52 words
A mechanism as claimed in claim 14, characterised in that a plurality of the magnetic tape read/write units (101, 102) are arranged parallel to each other in a common frame (103), and a common power source (104) and a common cooling fan (105) for the units are attached to the common frame.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.