Patent EP0274544A1 successfully refreshed from Google Patents.
EP0274544A1
Expired / Lapsed
EP
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Tape cassette
Assignee: Panasonic Holdings Corp
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Filing: 1987-07-16
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Granted: —
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Expires: 2007-07-16
Abstract
Abstract A tape cassette suitable for a video tape recorder to which two kinds of tape cassettes having different outer dim- entions can be loaded. The tape cassette has a front cover (80) covering a magnetic tape extended on the front surface of a cassette main body and a back cover (8) covering the back of the magnetic tape. An erroneous loading of the cassette can be prevented by forming the front edge ofthe upper surface of the back cover perpendicularly (81c) to the upper surface of the cassette main body so that the tape cassette can be loaded easily and reliably to the tape recorder. Furthermore, the tape cassette has high air-tightness, which prevents degradation in picture quality resulting from an increase in dropout due to invasion of dust and the like.
Inventors
- 👤 Yoshinori Shiomi
- 👤 Toshibumi Kamiyama
- 👤 Akihiro Nishimura
- 👤 Masao Kawagishi
- 👤 Hideki Sakumoto
- 👤 Masahiko Matsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:21
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/06; G11B25/066; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08735
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
82 words
A tape cassette comprising a cassette body constructed by an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound, a front cover for covering the magnetic tape stretched in the front of said cassette body and a rear cover for covering the rear side of the magentic tape, a front edge of an upper surface of said rear cover being arranged to be normal to an upper surface of said cassette body.
Claim 2
Dependent Claim
82 words
A tape cassette comprising a cassette body constructed by an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound, a front cover for covering the magnetic tape stretched in the front of said cassette body and a rear cover for covering the rear side of the magentic tape, a front edge of an upper surface of said rear cover being arranged to be normal to an upper surface of said cassette body.
Claim 3
Dependent Claim
50 words
A tape cassette as claimed in claim 1, wherein said cassette body has at its lower surface a guide channel which is directed in paralell to a direction of insertion of said cassette body into a magentic recording and reproducing apparatus having therein a convex for guiding said cassette body.
Claim 4
Dependent Claim
25 words
A tape cassette as claimed in claim 1, wherein substantially V-shaped recesses are partially provided on both side surfaces of said upper and lower cases.
Claim 5
Dependent Claim
82 words
A tape cassette as claimed in claim 1, further comprising an integrated member comprising a cylindrical portion rotatably engaged with a boss for coupling said upper and lower cases of said cassette body at an opening portion of a back surface of said cassette body and an error-erase detection portion exposed from a bottom surface of said cassette body through a hole provided at the bottom surface thereof, and indication and detection relating to error-erase being effected by means of the rotation.
Claim 6
Dependent Claim
35 words
A tape cassette as claimed in claim 4, wherein positioning for rotation is made by means of a combination of a convexed portion and cncaved portion respectively provided on said cylindrical portion and said boss.
Claim 7
Dependent Claim
22 words
A tape cassette as claimed in claim 4, wherein a convexed portion is provided on an indication portion of said integrated member.
Claim 8
Dependent Claim
23 words
A tape cassette as claimed in claim 4, wherein a color of said integrated member is different from that of the cassette half.
Claim 9
Dependent Claim
99 words
A tape cassette comprising a cassette body formed by an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound, a front cover for covering the magnetic tape stretched in the front of said cassette body and a rear cover for covering the rear side of the magnetic tape, said cassette body having at its lower surface a guide channel which is directed in paralell to a direction of insertion of said cassette body into a magnetic recording and reproducing apparatus having therin a projection for guiding said cassette body.
Claim 10
Dependent Claim
99 words
A tape cassette comprising a cassette body formed by an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound, a front cover for covering the magnetic tape stretched in the front of said cassette body and a rear cover for covering the rear side of the magnetic tape, said cassette body having at its lower surface a guide channel which is directed in paralell to a direction of insertion of said cassette body into a magnetic recording and reproducing apparatus having therin a projection for guiding said cassette body.
Claim 11
Dependent Claim
33 words
A tape cassette as claimed in claim 8, wherein recesses substantially V - shaped when viewed from the upper or lower sides are partially provided at both side surfaces of said cassette body.
Claim 12
Dependent Claim
124 words
A tape cassette comprising a cassette body formed by an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound, a front cover for covering the magnetic tape stretched in the front of said cassette body and a rear cover for covering the rear side of the magnetic tape, a front edge of an upper surface of said rear cover being arranged to be normal to an upper surface of said cassette body and said cassette body having at a lower surface a guide channel which is directed in parallel to a direction of insertion of said cassette body into a magnetic recording and reproducing apparatus having therein a projection for guiding said cassette body.
Claim 13
Dependent Claim
124 words
A tape cassette comprising a cassette body formed by an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound, a front cover for covering the magnetic tape stretched in the front of said cassette body and a rear cover for covering the rear side of the magnetic tape, a front edge of an upper surface of said rear cover being arranged to be normal to an upper surface of said cassette body and said cassette body having at a lower surface a guide channel which is directed in parallel to a direction of insertion of said cassette body into a magnetic recording and reproducing apparatus having therein a projection for guiding said cassette body.
Claim 14
Dependent Claim
29 words
A tape cassette as claimed in claim 10, recesses substantially V-shped when viewed from upper or lower side are partially provided at both side surfaces of said cassette body.
Claim 15
Dependent Claim
66 words
A tape cassette comprising a cassette body constructed of an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound and a cover for protecting the magnetic tape stretched in the front of said cassette body, recesses substantially V-shaped when viewed from upper or lower side are partially provided on both side surfaces of said body case.
Claim 16
Dependent Claim
66 words
A tape cassette comprising a cassette body constructed of an upper case and a lower case for encasing a pair of reels around which a magnetic tape is wound and a cover for protecting the magnetic tape stretched in the front of said cassette body, recesses substantially V-shaped when viewed from upper or lower side are partially provided on both side surfaces of said body case.
Claim 17
Dependent Claim
87 words
A tape cassette as claimed in claim 12, characterized by comprising a first parts positioned at a back surface of said cassette body for providing an opening at the back surface portion by means of sliding and a second parts operatively associated with said first parts and exposed at a bottom surface of said cassette body through a hole defined at the bottom body thereof, allowance of error-erase prevention being indicated at the cassette body bottom surface by means of the sliding movement of said first parts.
Claim 18
Dependent Claim
30 words
A tape cassette as claimed in claim 13, wherein said first parts having an elastic tongue-like piece to be engaged with first and second recesses provided on said cassette body.
Claim 19
Dependent Claim
44 words
A tape cassette as claimed in claim 13, wherein said first parts having a rised portion with an inclination provided between first and second recesses defined on said cassette body and an elastic tongue-like piece to be engaged with said first and second recesses.
References Cited (Backward Citations)
No citation records indexed.
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