Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – By extrusion spraying or gravity fall through orifice
Patent
1990-07-31
1991-09-03
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
By extrusion spraying or gravity fall through orifice
264 22, 264 401, 264205, D01D 511
Patent
active
050452487
ABSTRACT:
A process to detect the loss of a continuous spun web of plexifilament fibers exiting a forwarding apparatus depends on the manner in which the filament oscillate in a cross machine direction prior to depositing onto a collecting surface. The loss of these fibers, due to hang up in the filament forwarding device, can cause multiple position spinning machine loss due to the knock down of nearby spinning positions or wrap the sheet on forwarding rolls. The hang up in the forwarding device is referred to as a blow-up. This process detects the instant a blow-up occurs through the loss of electrostatic charge due to the absence of the oscillating swath at the sensor. When the instant charge is lost at the sensor, a signal indicates a blow-up has occurred.
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Satterfield Richard A.
Taylor David M.
E. I. Du Pont de Nemours and Company
Lorin Hubert C.
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