Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Reexamination Certificate
2006-08-29
2006-08-29
Joyce, Harold (Department: 3749)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
C264S339000, C425S363000
Reexamination Certificate
active
07097804
ABSTRACT:
A duct formed of a thermoplastic material is lightweight, strong, flame and smoke resistant, and non-toxic. The duct is formed from a flat laminate and does not require a specialized, disposable mandrel for supporting conventional thermoset plies. Preferably, the duct is formed from a preform, which is cut according to the desired shape and size of the duct so that trimming after the duct has been formed is not required. Additionally, features such as holes and spud locations can be provided by cutting or marking the preform before forming the duct. Each duct can be formed of multiple articulated segments that are joined by connectors.
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A short note on Duct Manufacturing for Aircraft Environmental Control Systems using CETEX Continuous fiber reinforced thermoplastic; Ten Cate Advanced Composites Technical Document Nr ITD5241.002; 1992; pp. 1-6; Nijverdal, The Netherlands.
Frantz Walter Forrest
Jorgenson Danny A.
Klein Denis J.
Maben Douglas D.
Alston & Bird LLP
Joyce Harold
The Boeing Company
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