Advancing material of indeterminate length – Processes
Patent
1991-09-24
1993-06-15
Stodola, Daniel P.
Advancing material of indeterminate length
Processes
226 4, 226 24, 226111, 226195, 34 52, 34155, B65H 2318
Patent
active
052191095
ABSTRACT:
In a level control method of controlling levels of a series of mutually joined materials when the materials pass through a catenary zone, whenever the joint travels a given length in the catenary zone, a plurality of optimum catenary curves are calculated with the position of the joint in the catenary zone as a parameter. Based upon a result of the calculation so obtained, a relationship indicative of the level of a material at the location of a catenary sensor is then calculated as a function of the position of the joint in the catenary zone. At this moment, the catenary sensor is used to detect the level of the material. Finally, the level of the material at the location of the catenary sensor is controlled with a value indicated by the above relationship being used as a target value. As a result, even when a joint between two adjoining materials having different unit weights passes through the catenary zone, the materials can travel in the catenary zone while the level is appropriately maintained.
REFERENCES:
patent: 3230634 (1966-01-01), Sachs
patent: 4561581 (1985-12-01), Kelly
patent: 4799558 (1989-01-01), Griffen
patent: 4898094 (1990-02-01), Doumoto et al.
Bowen Paul T.
Chugai Ro Co. Ltd.
Stodola Daniel P.
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