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US 5,248,524 AGranted
Method and apparatus for zoned application of particles in fibrous material with dual dispensing nozzles
AssigneeParagon Trade Brands, Inc.
InventorJ. Donald Soderlund
Life of this patent
Estimating the term…
Abstract
An apparatus and method for effecting zoned deposition of superabsorbent particles in a fibrous web includes the use of dual dispensing nozzles for forming selected deposition patterns. Fluidized streams of the superabsorbent particles are formed, with rotary valve assemblies employed for creating pulsed flow to each of the dispensing nozzles. The length, width, and relative positioning of the deposition patterns can be selectively varied in accordance with desired performance characteristics.
Claims10
A process for zoned application of superabsorbent particles in fibrous material comprising the steps of:
- moving said fibrous material in one direction;
- supplying a continuous gas-entrained stream of said superabsorbent particles through conduit means;
- providing first and second nozzle members connected to said conduit means for discharging said gas-entrained superabsorbent particles into said fibrous material;
- spacing said first and second nozzle members from each other in at least one direction,
- providing first valve means connected between said conduit means and said first nozzle member for interrupting communication between said conduit means and said first nozzle member at a first interval so that said first nozzle member discharges a pulsed stream of said superabsorbent particles to provide a first deposit pattern of said superabsorbent particles having a first width in said fibrous material;
- providing second valve means connected between said conduit means and said second nozzle member for interrupting communication between said conduit means and said second nozzle member at a second interval so that said second nozzle member discharges a pulsed stream of said superabsorbent particles to provide a second deposit pattern of said superabsorbent particles having a second width different from said first width in said fibrous material;
- and
- selecting said first and second intervals to provide a desired combination of said first and second deposit patterns of said particles in an overlapped manner which includes a step-wise change in a cross-direction density profile of said superabsorbent particles in said fibrous material.
5 more elements
An apparatus for zoned application of superabsorbent particles in fibrous material comprising the steps of:
- moving said fibrous material in one direction:
- supplying a continuous gas-entrained stream of said superabsorbent particles through conduit means;
- providing first and second nozzle members connected to said conduit means for discharging said gas-entrained superabsorbent particles into said fibrous material;
- spacing said first and second nozzle members from each other so as to be positioned in alignment with each other along said one direction;
- providing first valve means connected between said conduit means and said first nozzle member for interrupting communication between said conduit means and said first nozzle member at a first interval so that said first nozzle member discharges a pulsed stream of said superabsorbent particles to provide a first deposit pattern of said superabsorbent particles having first length and width in said fibrous material;
- providing second valve means connected between said conduit means and said second nozzle member for interrupting communication between said conduit means and said second nozzle member at a second interval so that said second nozzle member discharges a pulsed stream of said superabsorbent particles to provide a second deposit pattern of said superabsorbent particles having second length and width in said fibrous web, wherein said second width is different from said first width;
- selecting said first and second intervals to provide in said fibrous web a desired combination of said first and second deposit patterns of said particles which includes an overlapped region for increased absorbent capacity, said region having a length equal to or smaller than one of said first and second lengths, and having a width equal to the smaller one of said first and second widths.
4 more elements
Dependencies are inferred from the claim text.