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US 5,397,227 AGranted
Apparatus for changing both number and size of filaments
AssigneeBASF SE
InventorsJohn A. Hodan, Robert N. Armstrong, Wei Li
Life of this patent
Estimating the term…
Abstract
A sealing plate upstream of a spinneret has cylindrical flow channels, at least some of which have a first diameter. Each of the flow channels corresponds in position to a bore in the spinneret plate. The number and denier of extruded filaments can be altered by simply changing the plate. The plate provides a seal by deflecting under the extrusion pressure.
Claims10
A spinneret assembly comprising:
- a spinneret plate with an upstream side and having a number of bores, each bore with one or more tapered sections;
- and
- a sealing plate adjacent to the upstream side of said spinneret plate and forming an interface therewith, said sealing plate having non-compound cylindrical flow channels formed therein, at least some of said flow channels having a first diameter and at least some of said flow channels having a second diameter, which is smaller than said first diameter and each of said flow channels corresponding in position to a bore in said spinneret plate.
A spinneret assembly comprising:
- a spinneret plate with an upstream side having a number of bores, each bore with one or more tapered sections;
- and
- a sealing plate positioned upstream from said spinneret plate, said sealing plate having non-compound cylindrical flow channels which are fewer in number than said bores and at least some of said flow channels having a first diameter, each of said flow channels corresponding in position to a bore in said spinneret plate.
Dependencies are inferred from the claim text.