Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1978-10-26
1980-06-24
McCarthy, Edward J.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226 33, 226143, B65H 2318, B65H 1726
Patent
active
042091209
ABSTRACT:
An apparatus for the division-true, intermittent feed of a sheet of indeterminate length has a sheet supply roll; a table for receiving the sheet from the supply roll; a sheet tensioning device disposed between the supply roll and the table; an advancing device for advancing the sheet in each operational cycle through a forward feed stroke that is greater than the divisional distance defined by spaced markings on the sheet; a cutting device for cyclically severing a length from the sheet subsequent to the forward feed stroke; a reversing device for retracting the sheet in each operational cycle through a centering stroke subsequent to the forward feed stroke. The reversing device includes a force-exerting arrangement--constituted solely by the tensioning device--for imparting to the sheet a force for executing the centering stroke, a sensor head cooperating with the moving sheet for responding to the presence or absence of the sheet markings; a solenoid assembly having a solenoid and being connected with the sensor head for changing the state of energization of the solenoid as a function of the response of the sensor head to the sheet markings and an armature cooperating with the solenoid and the sheet for selectively immobilizing or releasing the sheet as a function of the state of energization of the solenoid.
REFERENCES:
patent: 3371834 (1968-03-01), Willits
patent: 3384281 (1968-05-01), Mason
patent: 3420158 (1969-01-01), Kobiella
patent: 3977586 (1976-08-01), Hertrich
patent: 4153190 (1979-05-01), Marion
Ruegg Franz
Schwarz Otto
McCarthy Edward J.
SIG - Schweizerische Industrie-Gesellschaft
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