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Advanced polymer/wood composite structural member    
United States Patent5539027   
Link to this pagehttp://www.wikipatents.com/5539027.html
Inventor(s)Deaner; Michael J. (Osceola, WI); Puppin; Guiseppe (Bayport, MN); Heikkila; Kurt E. (Circle Pines, MN)
AbstractA polymer and wood composite structural members can be manufactured by extruding and injection molding a composition comprising polyvinyl chloride, wood fiber and optionally a concentration of an intentionally added waste stream. Such structural members have strength, workability, fastener retention, resistance to rot and insect attack, and thermal properties sufficient to constitute an advanced composite wood replacement material. The advanced structural member can be used as a component in construction of any structure requiring sized lumber or specifically shaped wood products. In such an application, the structural members can be extruded in the shape of commonly available lumber. The structural members of the invention can also be extruded in complex shapes adapted to the assembly of windows and doors used in both residential and commercial structures. The structural members have a modulus, a coefficient of thermal expansion, a coefficient of elasticity, a compressive strength and other related properties ideal for use as a replacement for either metal or wood, window or door structural components. The preferred structural member is manufactured from a polyvinyl chloride and wood fiber composite that optionally contains an intentionally recycled impurity component. Such components comprise waste materials common in the manufacture of wood doors and windows. We have found that the cooperation between the amount of polymer material, the amount of an oriented wood fiber, and control over water content results in the improved structural properties of the composite structural members of the invention.
   














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Patent Text Patent PDF Print Page Summary File History
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Inventor     Deaner; Michael J. (Osceola, WI); Puppin; Guiseppe (Bayport, MN); Heikkila; Kurt E. (Circle Pines, MN)
Owner/Assignee     Andersen Corporation (Bayport, MN)
Patent assignment
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Publication Date     * July 23, 1996
Application Number     08/326,472
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     October 20, 1994
US Classification     524/13 52/309.1 52/309.7 428/338 428/339 524/16
Int'l Classification     C08L 097/02 C08J 005/04 E04C 001/00 B32B 005/00
Examiner     Michl; Paul R.
Assistant Examiner     DeWitt; LaVonda R.
Attorney/Law Firm     Merchant, Gould, Smith, Edell, Welter & Schmidt
Address
Parent Case     This is a continuation of application Ser. No. 08/224,399, filed Apr. 7, 1994, now abandoned, which is a File Wrapper Continuation of Ser. No. 07/938,365, filed Aug. 31, 1992, now abandoned, which applications are incorporated herein by reference.
Priority Data    
USPTO Field of Search     524/13 524/16 428/338 428/339 52/309.1 52/309.7
Patent Tags     advanced polymer/wood composite structural
   
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