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US5393536A Expired / Lapsed US ⏱️ 0.0 years remaining

Coextrusion apparatus

Assignee: Crane Building Products LLC
•
Filing: 1993-04-05
•
Granted: 1995-02-28
•
Expires: 2013-04-05
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Abstract

Abstract The present invention includes a method of producing a reinforced extrusion product, the product of the method, and the apparatus for making a reinforced extrusion product. The method of producing an extruded composite of the present invention, comprises the general steps of: (a) extruding a longitudinally oriented composite precursor comprising: (1) at least one thermoplastic polymeric material and (2) a core mixture of at least one thermosetting resin and at least one filler material; whereby the thermoplastic polymeric material(s) is/are extruded so as to substantially enclose a space, and whereby the core mixture is disposed in the space; and (b) maintaining the composite precursor under conditions whereby the thermoplastic polymeric material(s) become(s) cooled and the thermosetting resin(s) become(s) cured so as to form the extruded composite of the present invention. The present invention also includes an extruded composite made in accordance with the method of the present invention. The present invention also includes a coextrusion apparatus comprising: (1) an extrusion die adapted to form a hollow profile extrudate; (2) at least one extruder head adapted to extrude a thermoplastic material through the extrusion die so as to form a hollow thermoplastic extrudate; and an insulated injector tube adapted to coextrude a thermosetting material with the thermoplastic material and into the hollow thermoplastic extrudate.

Inventors

  • 👤 Jeffrey R. Brandt
  • 👤 Edward F. Kowalik
  • 👤 Bobby D. Riley

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 23:02
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/06; B29C48/09; B29C48/12; B29C48/15; B29C48/151; B29C48/152; B29C48/153; B29C53/00; B29C53/56; B29C53/58

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 92 words
A coextrusion apparatus, said apparatus comprising: (a) an extrusion die adapted to form a hollow profile extrudate said extrusion die having an upstream side and a downstream side; (b) at least one extruder head disposed on said upstream side of said extrusion die adapted to extrude a thermoplastic material through said extrusion die so as to form a hollow thermoplastic extrudate; and (c) an insulated injector tube disposed on said upstream side of said extrusion die adapted to coextrude a thermosetting material with said thermoplastic material and into said hollow thermoplastic extrudate.
Claim 2
Dependent Claim 92 words
A coextrusion apparatus, said apparatus comprising: (a) an extrusion die adapted to form a hollow profile extrudate said extrusion die having an upstream side and a downstream side; (b) at least one extruder head disposed on said upstream side of said extrusion die adapted to extrude a thermoplastic material through said extrusion die so as to form a hollow thermoplastic extrudate; and (c) an insulated injector tube disposed on said upstream side of said extrusion die adapted to coextrude a thermosetting material with said thermoplastic material and into said hollow thermoplastic extrudate.
Claim 3
Dependent Claim 48 words
A coextrusion apparatus according to claim 1 wherein said apparatus further comprises means to conduct a solid material into said hollow thermoplastic extrudate, said solid material selected from the group consisting of natural fibrous materials, synthetic fibrous materials, fiber optic materials and metal cords, wires, rods and sheets.
Claim 4
Dependent Claim 31 words
A coextrusion apparatus according to claim 2 wherein said apparatus further comprises means to conduct a solid material into said hollow thermoplastic extrudate additionally comprises means to braid said solid material.
Claim 5
Dependent Claim 31 words
A coextrusion apparatus according to claim 2 wherein said apparatus further comprises means to conduct a solid material into said hollow thermoplastic extrudate additionally comprises means to wind said solid material.
Claim 6
Dependent Claim 34 words
A coextrusion apparatus according to claim 2 wherein said apparatus further comprises dimension control means to control the dimensions of said thermoplastic extrudate, said dimension control means disposed downstream of said insulated injector tube.
Claim 7
Dependent Claim 29 words
A coextrusion apparatus according to claim 2 wherein said apparatus further comprises heating means to heat said thermoplastic extrudate, said heating means disposed downstream of said insulated injector tube.
Claim 8
Dependent Claim 29 words
A coextrusion apparatus according to claim 6 wherein said heating means comprises a heating means selected from the group consisting of induction heating means and radio frequency heating means.

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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) 1998-02-27 1998-08-29 1999-02-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-02-27 2002-08-29 2003-02-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-02-27 2006-08-29 2007-02-28 $7700.00 Window Closed / Lapsed

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