Dynamic magnetic information storage or retrieval – Head – Head accessory
Patent
1975-08-11
1977-03-15
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Head
Head accessory
226 97, 360102, G11B 1564, G11B 560, B65H 1732
Patent
active
040127923
ABSTRACT:
A magnetic head drum includes an upper section that carries a set of magnetic heads and rotates at a preselected head speed, and a stationary lower section that is characterized by a reduced diameter step formed along the tape wrap path thereover (e.g., a helical path for a helical scan recorder). Because of the reduced diameter step, tape pressure is shifted from the lower drum section to the upper drum section which, by virtue of its rotation, produces a low friction air bearing. The reduction in diameter to produce the above-described step, moreover, results in a shoulder or ledge along the lower edge of the tape wrap path, which shoulder serves as a guide for the tape, and promotes accurate tape tracking over the drum.
The amount of reduction in diameter for the lower drum section is not chosen arbitrarily, but is preferably within a range of 1 to 6 mils. In this range, a desirable balance is achieved between reduction in frictional drag and limiting of forces tending to distort the tape. Moreover, it appears that a reduction greater than around 6 mils tends to result in increased tape flutter.
REFERENCES:
patent: 3333753 (1967-08-01), Streets
patent: 3614338 (1971-10-01), Bogels
patent: 3840895 (1974-10-01), Kubo
patent: 3930270 (1975-12-01), Tanigawa et al.
Eastman Kodak Company
Grosser G. E.
Tupper Robert S.
LandOfFree
Magnetic head drum configuration having a friction reducing heli does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic head drum configuration having a friction reducing heli, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic head drum configuration having a friction reducing heli will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-429868