Magnetic tape drives

Winding – tensioning – or guiding – Strand tensioning device – Tortuous course

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Details

242 718, 226 91, 226 97, G11B 1532, B65H 1810, B65H 2014

Patent

active

047491469

ABSTRACT:
An automatically threading magnetic tape drive includes a small-flanged take-up reel and a removeable large-flanged supply reel whose diameter is greater than the center-to-center spacing of the reels. During threading, a hinged shutter is closed to provide an air-tight barrier between the reels, the supply reel lies in a region of relatively high air pressure H and the take-up reel lies in a region of relatively low air pressure L. An air-tight channel links the region H and L and tape is threaded through the channel by air flow. Tape is drawn towards the take-up hub by air flow along slots in one or both take-up flanges, and the hub surface is elastomer-coated. During normal running the shutter is opened and tape spooled on to the take-up reel may overlap the supply reel flanges.

REFERENCES:
patent: 3910526 (1975-10-01), Mosciatti
patent: 4520970 (1985-06-01), Rasmussen et al.
patent: 4620678 (1986-11-01), Kumakara et al.
patent: 4626950 (1986-12-01), Livermore et al.

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