Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – With particular drive
Patent
1995-06-01
1997-06-17
Darling, John P.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
With particular drive
2423551, 2423565, G11B 1543
Patent
active
056390424
ABSTRACT:
An improved brake mechanism for use with magnetic-drum tape machines is disclosed. It comprises a take-up reel, a supply reel, each having a gear and a roller body, and a friction device to provide frictional force during relative rotation between the respective pair of the gear and the roller body. The supply reel has a partial cylindrical portion, and a swing gear mechanism selectively engages with the gear of the take-up reel or the supply reel. A brake plate is mounted on the swing gear mechanism; it includes an auxiliary brake and a plurality of clutch teeth. When the swing gear mechanism is engaged with the supply reel or the take-up reel, the brake plate is driven in rotation to enable the clutch teeth to engage with the gear of the take-up reel or to enable the auxiliary brake to hold against the partial cylindrical portion of the supply reel to produce a brake force, and a main brake to engage with the supply reel. The main brake, swing gear, auxiliary brake and clutch teeth cooperate to match a operating mode of said magnetic tape machine to enable said supply and the take-up reels to exhibit variable brake force so as to provide a proper back tension on the tape.
REFERENCES:
patent: 4301483 (1981-11-01), Santoro
patent: 5289989 (1994-03-01), Park
patent: 5301073 (1994-04-01), Katohno et al.
patent: 5347411 (1994-09-01), Choi
patent: 5481418 (1996-01-01), Maikuma et al.
patent: 5501408 (1996-03-01), Kang et al.
Chiu Ming-Jer
Tzeng Jaw-Horng
Darling John P.
Industrial Technology Research Institute
Liauh W. Wayne
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