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Metal Working

Magnetic-tape-cassette

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Magnetic tape cassette

Details

Inventors: Ueda, Masaki;
Assignee: Fuji Photo Film Co., Ltd. (JP)
Primary Examiner: Tupper; Robert S.
Assistant Examiner:
Attorney, Agent or Firm: Razzano; Pasquale A.

A magnetic tape cassette comprises a cassette body for housing a magnetic tape wound around hubs and provided with tape pull-out holes at ends of a front face, and a guard panel supported on the cassette body for movement between a closed position at which the guard panel covers the magnetic tape and an opened position at which the guard panel exposes the magnetic tape at the front face of the cassette body. The guard panel comprises an outer cover for covering the outer surface of the magnetic tape at the front face of the cassette body and an inner cover supported on the outer cover for covering the inner surface of the magnetic tape. The cassette body is provided with guide walls near inner sides of the tape pull-out holes for guiding the magnetic tape, which is pulled out from the hubs, to the front face of the cassette. The outer cover is provided with vertical ribs which are inserted into the tape pull-out holes and positioned close to the guide walls to form narrow tape passages when the guard panel is closed.

DETAILED DESCRIPTION The primary object of the present invention is to provide a magnetic tape cassette wherein the magnetic tape does not jam between the outer cover and the inner cover of the guard panel even though the cassette is subjected to vibration at the time of cassette storing.
Another object of the present invention is to provide a magnetic tape cassette wherein the magnetic tape is correctly set at the magnetic head for recording and/or reproducing.
The present invention provides a magnetic tape cassette including a cassette body for housing a magnetic tape wound around a pair of hubs and provided with tape pull-out holes at opposite ends of a front face, and a guard panel supported on the cassette body for movement between a closed position at which the guard panel covers, at the front face of the cassette body, the magnetic tape pulled out from the tape pull-out holes to the front face of the cassette body, and an opened position at which the guard panel exposes the magnetic tape at the front face of the cassette body, the guard panel comprising an outer cover for covering the outer surface of the magnetic tape pulled out to the front face of the cassette body and an inner cover supported on the outer cover for movement in synchronization with opening and closing of the outer cover to cover the inner surface of the magnetic tape when the outer cover is closed, the cassette body being provided with guide walls near inner sides of the tape pull-out holes for guiding the magnetic tape, which is pulled out from the hubs, to the front face of the cassette, wherein said outer cover is provided with vertical ribs which are inserted into said tape pull-out holes and positioned close to said guide walls when said guard panel is closed.
When the guard panel is closed, the vertical ribs of the outer cover of the guard panel are positioned close to the guide walls of the cassette body, i.
e.
at a distance slightly larger than the magnetic tape thickness from the guide walls.
When the cassette assembling error is large, the distance should be selected considering the assembling error

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