Air momentum gage for controlling nonwoven processes
OwnerBryan David Haynesinventor
Life of this patent
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Abstract
A method and apparatus for monitoring the momentum of a meltspun jet thermal core used for making thermoplastic filaments is presented to aid in the uniformity of formation and elimination of waste in thermoplastic filament nonwoven web formation. The apparatus is easily and economically constructed and is relatively insensitive to positioning variations in the air stream of the filament formation apparatus.
Claims13
A method of controlling the formation and deposition of thermoplastic fibers which are attenuated in a molten state by an air jet coming from a melt die, comprising:
- a) placing a deflection head in the air jet;
- b) monitoring the deflection head to obtain data on air jet momentum;
- and
- c) adjusting air jet momentum or other fiber formation parameters based on the data obtained from the monitoring to optimize formation and deposition of the thermoplastic fibers.
A method of controlling the momentum of an air jet used in making of thermoplastic fibers, comprising:
- a) placing a deflection beam in the air jet;
- b) monitoring the deflection beam to obtain data on air jet momentum;
- and
- c) adjusting the air jet momentum based on the data obtained from the monitoring.
An apparatus for the monitoring of the momentum of an air jet used in making of thermoplastic fibers, comprising:
- a) a cantilever arm for suspending a deflection head;
- b) a deflection head attached to the cantilever arm;
- c) the deflection head sized and shaped to accept the air jet momentum of a thermoplastic fiber extrusion apparatus;
- d) a transducer operably connected to the cantilever arm;
- e) a data output means connected to the transducer.
An apparatus for the formation and deposition of thermoplastic fibers, comprising:
- a) a melt die for the extrusion of molten thermoplastic polymers;
- b) an air jet for the forming of the molten thermoplastic polymers into fibers;
- c) a forming wire for the collection of the fibers;
- d) a cantilever arm for suspending a deflection head;
- e) a deflection head attached to the cantilever arm;
- f) the deflection head extending into the air jet;
- g) a transducer operably connected to the cantilever arm;
- h) a data output means connected to the transducer;
- and
- i) a mount for placing the cantilever arm in a position to hold the deflection head within the air jet.
Dependencies are inferred from the claim text.