| 摘要 |
In conjunction with a randomizing web former is disclosed means for regulating the pressures subsisting within the jamming slot of the randomizing web former formed between the arcuate toothed surface of a carded staple fiber bearing cylinder and a confining surface mounted adjacent thereto. The regulating means includes a housing one wall of which is perforate so as to provide gaseous intercommunication with the interior plenum thereof, in which resides a pressure sensing element interconnected with a control element such as a preprogrammed computer. The plenum intercommunicates with a pressure adjusting device, and the latter is operatively interconnected with the control element. Signal from the sensor reflecting the then pressure within the jamming slot when received by the control element is compared with a target or desired pressure; any difference calculated is transmitted in the form of a command signal to the pressure adjusting device which forces more air into the plenum and thus into the jamming slot in instances of sensed pressures below the target pressure, or removes air as by a vacuum from the plenum and thus reduces pressure in the jamming slot when the sensed pressure there is greater than the targetted pressure desired.
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