Rotary head drum unit

Details Rotary head drum unit Rotary head drum unit

1991-07-09

1993-08-17

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Head accessory

G11B 1561

Patent

active

052374785

ABSTRACT:
A rotary head drum unit for a recording/reproducing apparatus comprises a stationary upper drum provided at its lower end with a taper surface for biasing a magnetic tape downward, a stationary lower drum provided in its circumference with a helical tape lead or guide surface to guide the lower edge of a tape helically extended across the upper and lower drums, and rotary heads inserted between the upper and lower drums. At least a portion of the taper surface of the upper drum in a lead-out region near a position where the magnetic tape departs from the rotary head drum unit is a helical taper section extended helical substantially in parallel to the helical tape lead or guide surface of the lower drum. The taper surface having the helical taper section is able to bias the magnetic taper downward in the lead-out region so that the lower edge of the magnetic tape is guided securely by the helical tape guide surface of the lower drum and keeps the upper edge of the magnetic tape taut through the entire arc of contact of the magnetic tape with the rotary head drum unit, so that the magnetic tape is secured for stable running.

REFERENCES:
patent: 4719528 (1988-01-01), Sato
patent: 4833562 (1989-05-01), Kochi et al.
patent: 4959743 (1990-09-01), Kochi et al.
patent: 5008769 (1991-04-01), Kaneko et al.
Patent Abstracts of Japan, vol. 12, No. 214 (P-718) (3061) Jun. 18, 1988 and JP-A-63 010 312 (Toshiba) Jan. 16, 1988.

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