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US 5,325,770 AGranted
Apparatus and method for baling cut fibers and product
AssigneeE. I. Du Pont de Nemours and Company
InventorsCraig R. Lukhard, Elwood A. Roth, Maurice C. Todd
Life of this patent
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Abstract
A process for producing a bale of crimped staple fibers includes the repeated steps of cutting continuous filament crimped nylon tow into segments, maintaining the integrity of the segments while tramping charges of the segments under pressure to form a compacted layer, holding the layer to retain layer compaction and then pressing the layers and strapping the pressed layers.
Claims1
A process for producing a bale of crimped nylon staple yarn from a continuous nylon multifilament tow comprising:
- continuously cutting the fiber tow into segments and doffing the cut tow segments by directing the segments radially outward and downward utilizing centrifugal and gravitational forces for extending and separating the segments perpendicular to the filaments;
- continuously transporting the separated segments along angled slides by gravity as a charge to a charge chamber;
- depositing the charge onto a support platen at a tramping position;
- accumulating the continuously transported segments to form a next charge;
- tramping the charge in the tramping position to a preselected pressure to form a compacted layer and pressing the support platen down one layer thickness;
- holding the last compacted layer in place to retain the layer compaction;
- depositing the next charge onto the last compacted layer at the tramping position;
- repeating the tramping, holding, depositing and accumulating steps until there are a plurality of compacted layers to form a bale;
- pressing the bale to a first pressure higher than the preselected tramping pressure;
- partially reducing the pressing to a pressure intermediate the first and preselected pressures;
- and
- strapping the bale to hold the compacted layers against expansion.
9 more elements
Dependencies are inferred from the claim text.