System for setting the sheet length on a crosscutter for webs of

Details System for setting the sheet length on a crosscutter for webs of System for setting the sheet length on a crosscutter for webs of

1979-09-12

1981-08-18

Schran, Donald R.

Cutting

With control means responsive to replaceable or selectable...

83 71, 83 37, 83324, B26D 520

Patent

active

042839750

ABSTRACT:
A system for setting the sheet length on a cross-cutter for webs of material includes a computer which delivers to the positioning element of a speed changing mechanism, the positioning signal for one speed corresponding to the desired sheet length and to a controlled group for the positioning element of an irregular motion mechanism and to a control loop for the positioning element of a continuously variable speed transmission. The desired values correspond to the desired sheet length and the control loop for the continuously variable speed mechanism receives as a actual value, the sheet length and specifies to the positioning element, the positioning time on the basis of the deviation of the actual value from the desired value and of the speed selected. Another comparison of actual value with desired value is made only at the completion of each positioning operation.

REFERENCES:
patent: 3267781 (1966-08-01), Sterns et al.
patent: 3543620 (1970-12-01), Hilsenbeck et al.
patent: 3668957 (1972-06-01), Nido
patent: 3742798 (1973-07-01), Gries
patent: 3797368 (1974-03-01), Martelli
patent: 3962942 (1976-06-01), Ferara
patent: 4020406 (1977-04-01), Tokuno et al.

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