Photoelectrophoretic web tension system

Details Photoelectrophoretic web tension system Photoelectrophoretic web tension system

1975-04-24

1976-09-28

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 7543, B65H 2522

Patent

active

039827100

ABSTRACT:
A photoelectrophoretic imaging apparatus web tension system for providing, in a preferred embodiment, constant tension to at least two webs. The drive rolls for each web are driven by a common drive motor through a gear box. In one embodiment a first web supply roll is connected to a hysteresis type brake which torque is controlled by a radius sensor riding on the supply roll. The radius sensor maintains constant tension in the web coming off the supply roll. From the supply roll, the web is transported around a friction capstan roller which is connected to another hysteresis brake set at a constant torque level. A takeup capstan roller and rewind roll supply tension to the web being rewound onto the rewind roll through hysteresis type clutches which are overdriven by an A.C. motor and gear box. The clutch at the takeup capstan roller is set at a constant torque level. The torque in the clutch at the rewind roll is controlled by a radius sensor which maintains constant tension in the web rewinding onto the rewind roll.

REFERENCES:
patent: 2469706 (1949-05-01), Winther
patent: 2639868 (1953-05-01), Trofimor
patent: 2916227 (1959-12-01), Bowen
patent: 3283228 (1966-11-01), Asseo

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