Automated web chop-out control for cut-to-mark cut-off machine

Details Automated web chop-out control for cut-to-mark cut-off machine Automated web chop-out control for cut-to-mark cut-off machine

1981-05-21

1983-06-14

Meister, James M.

Cutting

Processes

During movement of work past flying cutter

83 76, 83288, 83303, 83372, G05B 1928, B26D 520

Patent

active

043876145

ABSTRACT:
A moving web is divisible into a leader having a first set of registration marks and a trailer having a second set of registration marks. At a transition between the first and second sets of registration marks, a target is applied adjacent the initial mark of the second set. The target is sensed and tracked electronically to a shear. During an order change or a roll-to-roll change within an order, the web is automatically severed transversely by the shear two or more times to chop out a portion of the leader and trailer including the transition between the sets of marks. The leading edge of the trailer is tracked to a station intermediate the shear and the cut-off machine. The cut-off machine knives "crop" cut the trailer at the first registration mark following the leading edge of the trailer and thereafter cut the trailer automatically into blanks in synchronization with the second set of marks. Operation of the cut-off machine knives in the cut-to-mark mode is maintained without loss of synchronization across the portion of the web chopped out by the shear. Operator intervention is eliminated, and scrap is minimized.

REFERENCES:
patent: Re30628 (1981-05-01), Tokuno
patent: 3730810 (1973-05-01), Klein
patent: 3858052 (1974-12-01), Luska
patent: 4170155 (1979-10-01), Saito et al.
patent: 4287797 (1981-09-01), Seragnoli

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