Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1996-03-19
1999-11-09
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
With testing or indicating
2940705, 29429, 29806, 53118, 53430, 53435, 53520, 83 761, 83685, 83948, 242522, B26D 706, B26F 100
Patent
active
059790342
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of manufacturing a tape cartridge or cassette used as an external storage medium and an apparatus for manufacturing the cartridge. Specifically, the invention relates to an apparatus for forming a marking hole in a magnetic tape accommodated in the cartridge which is used for detecting leading and trailing ends of wound or rewound portion of the magnetic tape and distinguishing kind or length of the magnetic tape.
BACKGROUND ART
For example, Japanese Patent Application First Publication No. 2-162586 discloses a tape cartridge used as an external storage medium for a computer. This tape cartridge includes a base plate and a transparent resin cover attached to the base plate.
First and second reel shafts are disposed on the base plate, and first and second tape reels are rotatably supported on the first and second reel shafts.
A magnetic tape is wound on the first and second tape reels.
The magnetic tape is transported along first and second tape guides formed on the base plate, and passes through a head-inserting portion provided on the cover for access to the interior of the cartridge by a magnetic head.
First, second, and third roller shafts are uprightly formed on the base plate. A first belt guide roller (belt driving roller) is rotatably supported on the first roller shaft. Second and third belt guide rollers (corner rollers) are rotatably supported on the second and third roller shafts, respectively.
A drive belt is spanned between and placed around the first, second, and third belt guide rollers. The drive belt is pressingly contacted at its portion extending between the first and second belt guide rollers with an outer surface of the magnetic tape wound around the first tape reel, and pressingly contacted at its portion extending between the first and third belt guide rollers with an outer surface of the magnetic tape wound around the second tape reel.
When the drive belt is rotatingly driven, the first and second tape reels start to rotate due to frictional contact between the drive belt and the magnetic tape, whereby the magnetic tape is transported.
A mirror is so arranged on the base plate as to reflect a detection light emitted from a light emitting source of a drive device and direct the detection light onto the magnetic tape.
The cover is so disposed on the base plate as to cover the first and second tape reels, the magnetic tape, and the like.
The cartridge is used by being inserted into the drive device.
The drive device includes the light emitting source, a first light receiving member (cartridge-in sensor), and a second light receiving member (tape-position sensor).
When the tape cartridge is inserted into the drive device, the detection light emitted from the light emitting source is reflected on the mirror, and therefore it fails to reach the first light receiving member. Thus, it is detected that the tape cartridge is disposed within the drive device.
The detection light reflected on the mirror is oriented to the magnetic tape and the second light receiving member.
On the other hand, when the tape cartridge is inserted into the drive device, a drive capstan roller provided in the drive device is so driven as to come into contact with the first belt guide roller.
When the drive capstan roller is rotated, the first belt guide roller is rotated to thereby move the drive belt by which the magnetic tape is transported.
When the magnetic tape is transported so that a marking hole formed therein moves through a light path of the detection light reflected on the mirror, the detection light reaches the second light receiving member through the marking hole so that a leading or trailing end of a wound or rewound portion of the magnetic tape is detected.
FIG. 16 shows an explanatory diagram indicating a method of manufacturing a tape cartridge which has been previously proposed by an applicant of the present application.
This method comprises the steps of: (A) forming first and second reel shafts, first and second guides, first, second
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Higuchi Shintaro
Honma Hiroyuki
Gorski Joseph M.
Maioli Jay H.
Sony Corporation
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