Advancing material of indeterminate length – By orbitally traveling material-engaging surface – With drive means
Patent
1981-05-29
1983-06-21
Christian, Leonard D.
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
With drive means
226190, B65H 1722
Patent
active
043890091
ABSTRACT:
An improvement in a high speed tape feeding apparatus comprising a pair of cylindrical drums rotatable in tangential contact so as to pull a tape out of the roll of tape by frictionally driving the tape therebetween, one of the pair of drums being mounted for free rotation on a first drive shaft and having a circumference slightly longer than the length of one section to be cut from the tape, the tape having identical patterns and check marks printed thereon and to be cut into sections bearing one printed pattern, the other drum being mounted for free rotation on the second drive shaft and having a circumference slightly shorter than the length of one section to be cut from the tape, an electromagnetic clutch between the first drum and the first drive shaft, a unidirectional shaft between the other drum and the second drive shaft, photoelectric sensing apparatus for detecting two successive check marks on the tape, and producing signals, and a mechanism for bringing the electromagnetic clutch into and out of transmission engagement under the control of the photoelectric apparatus. The structure for the electromagnetic clutch is presented and structure for the unidirectional clutch is disclosed.
REFERENCES:
patent: 3186273 (1965-06-01), Tomberg
patent: 3559568 (1971-02-01), Stanley
patent: 3899946 (1975-08-01), Niepmann
patent: 4081944 (1978-04-01), Sjostrand
patent: 4158429 (1979-06-01), Ohmori
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