Web handling apparatus

Details Web handling apparatus Web handling apparatus

1974-06-21

1976-04-06

Schacher, Richard A.

Advancing material of indeterminate length

With material-responsive control means

To regulate longitudinal movement of material

226 49, 226136, B65L 2532

Patent

active

039484254

ABSTRACT:
A web handling mechanism is described for incrementally feeding a web of stretchable material (e.g., plastic film) to a processing station. The web feed rollers are driven by a motor incorporated in a servo system which electronically controls the feed rate, length of increment, dwell at processing station, etc. Variations in the speed and elasticity of a moving web are accommodated by means of a vacuum box adapted to accumulate a loop of the web material in the box and maintain proper tension on the web as supplied to the feed rollers. A detector in the vacuum box responds to a predetermined length of web accumulated in the box to trip a control circuit which actuates the feed roller motor to move the desired length of web through the processing station and then stop for a preselected interval. The circuit also controls the processing station to synchronize its operation with that of the web feed and the entire sequence is repetitive at high speed. Complete flexibility of operation is provided by the control circuit.

REFERENCES:
patent: 2631530 (1953-03-01), Englund
patent: 3124290 (1964-03-01), Lloyd
patent: 3177749 (1965-04-01), Best
patent: 3240411 (1966-03-01), Zarleng
patent: 3310249 (1967-03-01), Bryer

Affiliated with

Also associated with

Rating

Web handling apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Web handling apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Web handling apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1572307