Web position controller for web transport systems

Details Web position controller for web transport systems Web position controller for web transport systems

1978-09-18

1980-07-15

Christian, Leonard D.

Advancing material of indeterminate length

Passive guide

242 571, B65H 2304, G03B 148

Patent

active

042124220

ABSTRACT:
A web position controller for a web transport system positions and aligns a moving web, having a variable center line, to the predetermined center line of a system utilizing the web. A fixed roller or other means constrains the moving web to contact the input roller at a constant or slightly varying angle, referenced to a pivotal axis of a rocker arm type of, preferably, a statically balanced carriage such that if the elevation of the moving web is above or below the predetermined center line of the web utilization system, the web causes a tilting action of the carriage. Mounted on the carriage are input and output rollers. The tilting action of the carriage changes the elevation of the moving web such that, upon exiting the carriage output roller, the axis of the web is substantially aligned to be coincident with the predetermined line of the system. The web position controller may be used to effect a vertical translation of the moving web while maintaining accurate alignment of the web with the center line of the system.

REFERENCES:
patent: 3411683 (1968-11-01), Bartles et al.
patent: 3598332 (1971-08-01), Sharkey
patent: 3693855 (1972-09-01), Bonner
patent: 3973446 (1976-08-01), Vasilantone
patent: 4049213 (1977-09-01), Hank et al.

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