Dynamic magnetic information storage or retrieval – Head – Head accessory
Patent
1981-11-30
1984-07-24
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Head accessory
360 85, G11B 541
Patent
active
044620560
ABSTRACT:
A cassette type cleaning device for a video tape recorder is disclosed in which a cleaning tape is carried on a pair of reels inside the cassette. The cleaning cassette may be inserted into a recorder and the cleaning tape advanced in moving the contact with the recorder heads and tape guides in the manner of a conventional video tape cassette. The cleaning tape has a non-abrasive surface contacting the recorder and is preferably formed from a synthetic suede material having a thickness of no more than about 0.4 mm, with a bristled surface on the side of the tape contacting the recorder heads. An aperture is provided in the side of the cassette housing in alignment with the tape wound about one reel, allowing cleaning fluid to be dispensed through the aperture onto the wound tape to produce an alternating wet and dry pattern, without exposing the tape by opening the cassette access door. In one embodiment the tape has openings at each end which interface with a light source and light sensors in the recorder to terminate operation of the recorder at the end of a cleaning cycle. In another embodiment metallic strips are adhered to and overlie the tape near each end to actuate a turn-off device. The cleaning cassette may also include an extractable tension relief arm which at least partially blocks the movement of a tension sensing mechanism in the recorder, thereby reducing tape drag as the tape is advanced through the recorder.
REFERENCES:
patent: 4387411 (1983-06-01), Clausen et al.
patent: 4388663 (1983-06-01), Becella
patent: 4408241 (1983-10-01), Ogawa
Harris Michael D.
Hecker Stuart N.
Koppel Richard S.
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