Extrusion application system
AssigneeB & H Manufacturing Company, Inc.
InventorsSvatoboj Otruba, Ranbir Singh Claire
Life of this patent
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Abstract
A machine and a method of applying a non-Newtonian liquid composition onto a surface in a controlled manner. The composition is held in a chamber at a controlled variable pressure and is dispensed through a slit die nozzle as controlled by a valve. Characteristics of the composition are empirically developed and provided to a logic control circuit to assure that the composition is dispensed on either the entire surface or in one or more precise locations.
Claims16
A method of extruding a controlled amount of a non-Newtonian fluid from a source of the non-Newtonian fluid, through a chamber of an applicator to a nozzle of the applicator, and through the nozzle of the applicator onto a substrate moving relative to the nozzle, comprising:
- applying a predetermined pressure to the non-Newtonian fluid at a known temperature;
- extruding the controlled amount of the non-Newtonian fluid, subject to the predetermined pressure, via an extrusion pathway through the chamber to the nozzle and through the nozzle onto the moving substrate;
- and
- redirecting a portion of the non-Newtonian fluid along a return pathway, independent of the extrusion pathway, from the chamber of the applicator to the source of the non-Newtonian fluid during extrusion of the controlled amount of non-Newtonian fluid in the extrusion step,
- wherein the predetermined pressure is based on empirical correlations of pressure applied to a calibration fluid, speed of a substrate relative to a nozzle during extrusion of the calibration fluid, and an amount of the calibration fluid extruded during an empirical data acquisition process performed independently of the extruding step.
Dependencies are inferred from the claim text.