Maximum web speed monitor

Details Maximum web speed monitor Maximum web speed monitor

1977-03-15

1978-12-05

Gruber, Felix D.

Boots, shoes, and leggings

83 74, 234 50, 340670, 340673, 364570, G05B 500, B26D 538

Patent

active

041288866

ABSTRACT:
A maximum web speed monitor for limiting the speed of a moving web which is cut into sheets by a knife such as a rotary knife. A digital cut-off control provides separate signals indicative of the web speed and the length of sheets into which the web is cut by the knife. A digital integrator repetitively provides a sample signal indicative of the actual speed of the web based on a preselected sampling interval. Information representative of maximum permissible web speed as a function of sheet length is stored in a PROM. The web speed is prevented from exceeding a maximum permissible speed as a function of the maximum permissible web speed information and the sample signal.

REFERENCES:
patent: 3626457 (1971-12-01), Duerr et al.
patent: 3668957 (1972-06-01), Nido
patent: 3774171 (1973-11-01), Regitz
patent: 3949359 (1976-04-01), Sorkin
patent: 3956617 (1976-01-01), Schmidt
patent: 3982454 (1976-09-01), Schneider et al.
patent: 4015183 (1977-03-01), Miyakita
patent: 4020406 (1977-04-01), Tokuno et al.

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