Patent US3909170A successfully refreshed from Google Patents.
US3909170A
Expired / Lapsed
US
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Adjustable flat spinneret for the coextrusion of flat films comprising a plurality of components
Assignee: Cellophane SA France
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Filing: 1972-12-27
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Granted: 1975-09-30
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Expires: 1992-12-27
Abstract
Abstract Apparatus for adjusting the flow of at least two extrudable fluids to a coextrusion nozzle comprising a generally cylindrical conduit having a discharge end and a distal end, feed means for each fluid communicating with the interior of this conduit, and at least one substantially planar partition rotatably mounted in this conduit in the distal end thereof, the plane of these partitions being parallel with the axis of the conduit and the edges of the partition each terminating near the inside wall of the conduit. A process for producing composite films which may later be either monoaxially or biaxially drawn by coextruding a plastic film having a central area with two borderstrips having different compositions attached to each side of the running length of the central area. The films comprise a central area having at least two layers and a borderstrip having a composition different from the central area and attached to each running edge of the central area.
Inventors
- 👤 Robert Riboulet
- 👤 Yves Galery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:47
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/16; B29C48/18; B29C48/19; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/36; B29C48/49; B29C48/17
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
Apparatus for adjusting the flow of at least two extrudable fluids to a coextrusion nozzle comprising a first generally cylindrical conduit having a discharge end and a distal end, feed means for each fluid communicating with the interior of said conduit adjacent the distal end of said conduit, at least two of said feed means each comprising a feed conduit laterally extending from said cylindrical conduit, each of said feed means being spaced approximately 180* from each other and at least one substantially planar partition rotatably mounted in said cylindrical conduit in said distal end thereof, the plane of said partition being parallel with the axis of said cylindrical conduit and the edges of said partition each terminating sufficiently close to the inside wall of said cylindrical conduit to prevent extrudable fluid from flowing around said edges wherein said discharge end of said first cylindrical conduit communicates with the inlet end of an end feed, flat extrusion nozzle.
Claim 2
Dependent Claim
158 words
Apparatus for adjusting the flow of at least two extrudable fluids to a coextrusion nozzle comprising a first generally cylindrical conduit having a discharge end and a distal end, feed means for each fluid communicating with the interior of said conduit adjacent the distal end of said conduit, at least two of said feed means each comprising a feed conduit laterally extending from said cylindrical conduit, each of said feed means being spaced approximately 180* from each other and at least one substantially planar partition rotatably mounted in said cylindrical conduit in said distal end thereof, the plane of said partition being parallel with the axis of said cylindrical conduit and the edges of said partition each terminating sufficiently close to the inside wall of said cylindrical conduit to prevent extrudable fluid from flowing around said edges wherein said discharge end of said first cylindrical conduit communicates with the inlet end of an end feed, flat extrusion nozzle.
Claim 3
Dependent Claim
66 words
The apparatus of claim 1, wherein there are two substantially planar partitions rotatably mounted in said conduit said two parallel partitions defining a volume within said conduit and said apparatus further including at least one additional feed means communicating with said volume defined by said parallel partitions, the axis of said at least one additional feed means being the same as the axis of said conduit.
Claim 4
Dependent Claim
12 words
The apparatus of claim 1, wherein there is one substantially planar partition.
Claim 5
Dependent Claim
359 words
Apparatus for adjusting the flow of at least two extrudable fluids to a coextrusion nozzle comprising a first generally cylindrical conduit having a discharge end and a distal end, feed means for each fluid communicating with the interior of said first conduit adjacent the distal end of said first conduit, at least two of said feed means each comprising a feed conduit laterally extending from said first conduit, each of said feed means being spaced approximately 180* from each other, two substantially planar partitions rotatably mounted in said first conduit in said distal end thereof, the plane of said partitions being parallel with the axis of said first conduit and the edges of said partitions each terminating sufficiently close to the inside wall of said first conduit to prevent extrudable fluid from flowing around said edges, said two parallel partitions defining a volume within said first conduit, at least one additional feed means communicating with said volume defined by said parallel partitions, the axis of each additional Feed means being the same as the axis of said first conduit, said additional feed means comprising a second generally cylindrical conduit having a distal end and a discharge end, said discharge end directly communicating with the volume between said partitions and said distal end, at least two extrudable fluid feed means communicating with the interior of said second conduit adjacent the distal end thereof, at least two of said extrudable fluid feed means each comprising a feed conduit laterally extending from said second conduit, each of said feed means being spaced approximately 180* from each other and at least one substantially planar partition rotatably mounted in said second conduit in the distal end thereof, the plane of each planar partition in said second conduit being parallel with the axis of said second conduit and the edges of each partition each terminating sufficiently close to the inside wall of said second conduit to prevent extrudable fluid from flowing around said edges, the axis of said first and second conduits being the same, said discharge end of said first cylindrical conduit communicating with the inlet end of an end feed, flat extrusion nozzle.
Claim 6
Dependent Claim
359 words
Apparatus for adjusting the flow of at least two extrudable fluids to a coextrusion nozzle comprising a first generally cylindrical conduit having a discharge end and a distal end, feed means for each fluid communicating with the interior of said first conduit adjacent the distal end of said first conduit, at least two of said feed means each comprising a feed conduit laterally extending from said first conduit, each of said feed means being spaced approximately 180* from each other, two substantially planar partitions rotatably mounted in said first conduit in said distal end thereof, the plane of said partitions being parallel with the axis of said first conduit and the edges of said partitions each terminating sufficiently close to the inside wall of said first conduit to prevent extrudable fluid from flowing around said edges, said two parallel partitions defining a volume within said first conduit, at least one additional feed means communicating with said volume defined by said parallel partitions, the axis of each additional Feed means being the same as the axis of said first conduit, said additional feed means comprising a second generally cylindrical conduit having a distal end and a discharge end, said discharge end directly communicating with the volume between said partitions and said distal end, at least two extrudable fluid feed means communicating with the interior of said second conduit adjacent the distal end thereof, at least two of said extrudable fluid feed means each comprising a feed conduit laterally extending from said second conduit, each of said feed means being spaced approximately 180* from each other and at least one substantially planar partition rotatably mounted in said second conduit in the distal end thereof, the plane of each planar partition in said second conduit being parallel with the axis of said second conduit and the edges of each partition each terminating sufficiently close to the inside wall of said second conduit to prevent extrudable fluid from flowing around said edges, the axis of said first and second conduits being the same, said discharge end of said first cylindrical conduit communicating with the inlet end of an end feed, flat extrusion nozzle.
Claim 7
Dependent Claim
49 words
The apparatus of claim 4, wherein there are two substantially planar partitions rotatably mounted in said second cylindrical conduit, said two parallel partitions defining a volume within said second cylindrical conduit and further including at least one additional feed means communicating with said volume defined by said parallel partitions.
Claim 8
Dependent Claim
16 words
The apparatus of claim 4, wherein there is one substantially planar partition in said second conduit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |