Web-position controller

Details Web-position controller Web-position controller

1986-04-10

1988-08-02

Levy, Stuart S.

Advancing material of indeterminate length

With material-responsive control means

To position material laterally

226 20, B65H 2303, B65H 2602

Patent

active

047609451

ABSTRACT:
A conveyor belt controller for controlling the variations in the lateral position of a running conveyor belt comprises a regulated stretch of conveyor belt having a guide member, particularly a guide roller, at one end, a controllable guiding mechanism able to laterally displace the conveyor belt when the conveyor belt is shifted from a correct position, and at least one video camera observing the lateral motion of the conveyor belt whose electrical image signal is convertable by a computer into a controlling command for the guiding mechanism. The video camera is mounted upstream from the guide member spaced approximately a distance equal to the length of the regulated stretch. An indicating member is provided in the image field of the video camera for the actual position of the guiding mechanism extending transversely to the guiding mechanism. Advantageously, the indicating member is provided with an indicator light source which is pulsed for more sensitive detection.

REFERENCES:
patent: 3368726 (1968-02-01), Funk et al.
patent: 3912193 (1975-10-01), Calvaer
patent: 4021031 (1977-05-01), Meihofer et al.
patent: 4384686 (1983-05-01), Wiley et al.

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