Boots – shoes – and leggings
Patent
1989-07-31
1991-12-10
Lall, Parshotam S.
Boots, shoes, and leggings
226 45, B65H 2600
Patent
active
050724142
ABSTRACT:
The edge of a web of material is inserted into a gap in a detector head between an ultrasonic blockage transmitter and an ultrasonic blockage receiver such that the magnitude of the pulse of sound from the transmitter that is received by the receiver is related to the portion of the web that blocks the beam of sound and thereby the position of the edge of the web. The ultrasonic frequency of each pulse is preferably very high to provide a narrow beam. The second half of the electronic drive pulse to the transmitter is preferably 180.degree. out of phase with the first half of the pulse to reduce excessive ringing of the transmitter. A compensation transmitter and compensation receiver, which are mounted proximate to the blockage transmitter and the blockage receiver, transmit similar sound signals across the gap but are unoccluded by the web. The apparatus includes a controller with a microprocessor which:
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The Ultrasonic Edge Sensor: Model US 2000, General Web Dynomis Flyer.
AccuGuide Electronic Web Guide, AccuWeb advertisement.
Pulsonic, Ultrasonic, Non-Contact Measuring System, Cleveland Machine Controls, Inc. brochure.
Buisker Raymond A.
Martyn James
Ziemann Erich T.
AccuWeb, Inc.
Cosimano Edward R.
Lall Parshotam S.
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