Typewriting machines – Sheet or web – For feeding web record-medium
Patent
1997-08-28
1998-10-13
Burr, Edgar S.
Typewriting machines
Sheet or web
For feeding web record-medium
74665GA, 74665GE, 192 489, 192 94, 400223, 400225, 400235, B41J 1100, F16D 2102, F16H 3706
Patent
active
058202803
ABSTRACT:
A printer includes a variable torque assembly that allows a printer controller to vary torque on supply and take-up reels in response to monitored diameter of the supply or take-up reels. In one embodiment, the variable torque assembly is a torque divider that divides a fixed amount of torque between a supply reel and a take-up reel. The ratio of torques on the supply and take-up reels is controller by a control stepper motor that adjusts respective Acme gears to adjust pressure on respective clutch plates to increase or decrease the amount of "drag" applied by the clutch plates. In another embodiment, separate control stepper motors control torque to each of the supply and take-up reels so that the overall amount of torque can be varied to accommodate changes in print media lengths.
REFERENCES:
patent: 4376585 (1983-03-01), Fromme et al.
patent: 4625218 (1986-11-01), Watanabe
patent: 4788558 (1988-11-01), Caldwell et al.
patent: 5158376 (1992-10-01), Alessandro et al.
patent: 5284396 (1994-02-01), Masumura et al.
patent: 5300953 (1994-04-01), Schulte
patent: 5333807 (1994-08-01), Maehara et al.
patent: 5342131 (1994-08-01), Nakajima et al.
patent: 5441210 (1995-08-01), Hinton
Burr Edgar S.
Colilla Daniel J.
Intermec Corporation
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