EP0135195A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetic tapecassette
Assignee: Sony Corp
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Filing: 1984-09-14
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Granted: —
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Expires: 2004-09-14
Abstract
Abstract A magnetic tape cassette for use in a magnetic recording/reproducing apparatus has a sliding plate (10) provided on a lower surface (3b) to selectively cover and expose insertion apertures (5,6) that open into the interior of the cassette. A front lid (9) is provided which may be pivoted to either expose or cover a front opening (1a) in the cassette through which tape (7) may be withdrawn for a recording/ reproducing operation. When the front lid (9) is in its closed position and the sliding plate (10) covers the insertion apertures (5, 6), the front lid (9) is locked in its closed position. The magnetic tape cassette is thereby closed to prevent dust, oil and other contaminants from damaging the magnetic tape (7) within.
Inventors
- 👤 Kawakami Kenji
- 👤 Horikawa Norikazu
- 👤 Yamamoto Yoshinori
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:25
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
166 words
A magnetic tape cassette, comprising: a casing (1) enclosing first and second reel hubs (4a, 4b) adapted to have a magnetic tape (7) wound thereabout; a first portion (3) of said casing having first and second reel shaft insertion apertures (5, 6) having said first and second reel hubs (4a, 4b)are respectively residing therein and a marginal cut-out portion (3a) through which said magnetic tape may be withdrawn from said cassette; and sliding plate means (10) provided on said first portion (3) and freely slidable between first and second positions thereon, such that, in said first position of said sliding plate means, said first and second insertion apertures (5, 6) and said cut-out portion (3a) are exposed for respectively receiving first and second reel shafts and tape withdrawing means and, in said second position , said sliding plate means (10) covers said first and second insertion apertures (5, 6) and said cut-out (3a) whereby said magnetic tape (7) in said cassette is protected from external contamination.
Claim 2
Dependent Claim
166 words
A magnetic tape cassette, comprising: a casing (1) enclosing first and second reel hubs (4a, 4b) adapted to have a magnetic tape (7) wound thereabout; a first portion (3) of said casing having first and second reel shaft insertion apertures (5, 6) having said first and second reel hubs (4a, 4b)are respectively residing therein and a marginal cut-out portion (3a) through which said magnetic tape may be withdrawn from said cassette; and sliding plate means (10) provided on said first portion (3) and freely slidable between first and second positions thereon, such that, in said first position of said sliding plate means, said first and second insertion apertures (5, 6) and said cut-out portion (3a) are exposed for respectively receiving first and second reel shafts and tape withdrawing means and, in said second position , said sliding plate means (10) covers said first and second insertion apertures (5, 6) and said cut-out (3a) whereby said magnetic tape (7) in said cassette is protected from external contamination.
Claim 3
Dependent Claim
23 words
A magnetic tape cassette according to claim 1, further comprising means for resiliently urging said sliding plate means (10) into said second position.
Claim 4
Dependent Claim
84 words
A magnetic tape cassette according to claim 1, wherein said casing (1) includes a front surface having a front opening (1a) therein, said magnetic tape cassette further comprising front lid means (9) freely pivotable between a closed position covering said front opening (1a) and an open position exposing said front opening (1a) ; said sliding plate means (10) in its second position cooperating with said front lid means (9) in said closed position to maintain said front lid means (9) in said closed position.
Claim 5
Dependent Claim
87 words
A magnetic tape cassette according to claim 3, wherein said casing (1) further includes first and second parallel side walls (2c, 2c'); said front lid means (9) has first and second arm members (9a, 9a') extending from opposed side edges thereof to overlie portions (2e, 2e') of said first and second side walls (2c, 2c') respectively; and said sliding plate means (10) in said second position cooperates with said first and second arm members (9a, 9a') to maintain said front lid means (9) in said closed position.
Claim 6
Dependent Claim
74 words
A magnetic tape cassette according to claim 4, wherein each of said arm members (9a, 9a') is mounted on the respective side wall (2c, 2c') by a shaft (9c, 9c') to provide rotation of said front lid means (9) between its open and closed positions; said sliding plate means (10) in its second position preventing said arm members (9a, 9a') from rotating about said shafts (9c, 9c') from said closed to said open position.
Claim 7
Dependent Claim
94 words
A magnetic tape cassette according to claim 4, wherein said front lid means (9) includes a plate member (9b) of substantially the same size as said front opening (1a); said arm members (9a, 9a') are extensions of said plate member (9b) formed by bending side end portions of said plate member at right angles; and said arm members (9a, 9a') have a thickness substantially equal to an indented depth of stepped portions (2e, 2e') of said upper side walls (2c, 2c'), said arm members being rotatably supported by shafts pivoted to said stepped portions.
Claim 8
Dependent Claim
77 words
A magnetic tape cassette according to claim 6, wherein said plate member (9b) and said arm members (9a, 9a') are formed in an L-shaped configuration and, when said sliding plate means (10) is in said second position, an end portion of said sliding plate means (10) contacts said arm members (9a, 9a') and said plate member (9b) to lock said front lid means (9) against rotation, whereby said-cassette casing (1) is locked in a tightly closed condition.
Claim 9
Dependent Claim
113 words
A magnetic tape cassette according to claim 1, wherein said casing (1) includes an upper half portion (2) having a top wall (2b) and first and second upper side walls (2c, 2c') and a lower half portion (3) having a bottom wall (3b) and first and second lower side walls (3c, 3c') aligned with said first and second upper side walls (2c, 2c'), respectively; said sliding plate means (10) slidingly engages said side walls (3c, 3c') of casing for sliding movement between said first and second positions; and said bottom wall (3b) constitutes said first portion and includes stop means for preventing disengagement of said sliding plate means (10) from said casing (1).
Claim 10
Dependent Claim
112 words
A magnetic tape cassette according to claim 8, wherein said upper side walls (2c, 2c') oppose said lower side walls (3c, 3c') to define therebetween first and second guide grooves (11, 11'); and said sliding plate means (10) includes a flat plate member (10a) overlying a portion of said bottom wall (3b), first and second side plate members (10b, 10b') extending from opposed side edges of said flat plate member (10a) and respectively overlying said first and second lower side walls (3c, 3c'), and first and second guide members (10c, 10c') extending from said first and second side plate members (10b, 10b') and respectively engaging said first and second guide grooves (11).
Claim 11
Dependent Claim
31 words
A magnetic tape cassette according to claim 9, wherein exterior surfaces of said upper side walls (2c, 2c') and said respective side plate members (10b, 10b') lie in the same plane.
Claim 12
Dependent Claim
130 words
A magnetic tape cassette according to claim 9, wherein said casing (1) includes a front surface having a front opening (1a) therein, said magnetic tape cassette further comprising front lid means (9) freely rotatable between a closed position covering said front opening (1a) and an open position exposing said front opening, said front lid means (9) having first and second arm members (9a, 9a') extending from opposed side edges thereof to overlie said frist and second upper side walls (2c, 2c'), respectively; and said first and second side plate members (10b, 10b') of said sliding plate means (10), when said sliding plate means is in said second position, cooperate with said first and second arm members (9a, 9a'), respectively; to maintain said front lid means (9) in said closed position.
Claim 13
Dependent Claim
38 words
A magnetic tape cassette according to claim 11, wherein exterior surfaces of said upper side walls (2c, 2c'), said respective side plate members (10b, 10b') and said respective arm members (9a, 9a') all lie in the same plane.
Claim 14
Dependent Claim
65 words
A magnetic tape cassette according to claim 12, wherein said upper side walls (2c, 2c') have indented stepped portions (2e, 2e') formed at positions adjacent said front lid means (9) for rotatably supporting said arm members (9a, 9a') of said front lid means (9), said stepped portions (2e, 2e') being indented to a depth equal to the width of said side plate members (10b, 10b').
References Cited (Backward Citations)
No citation records indexed.
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