Claims
- 1. An extrusion die comprising:
- a tapering orifice for compressing a first extrudable material of foam plastic having a predetermined U-shaped profile at the compression end of said tapering orifice, said tapering orifice positioned to receive said foam plastic material and to communicate said foam plastic material therethrough;
- a first opening communicating with said orifice for applying an extrudable coating of a second extrudable plastic coating material onto said foam plastic material within said orifice;
- a second opening communicating with said orifice for applying a third extrudable flexible plastic material therethrough to form a flexible flange attached to said first extrudable foam plastic material.
- 2. A die according to claim 1 wherein said second opening accommodates a plurality of slots for applying a plurality of flanges to said first material.
- 3. A die according to claim 1 wherein said profile is in the form of a window sash.
- 4. A die according to claim 1 comprising a plurality of plates aligned longitudinally along an axis to form said tapering orifice and profile.
- 5. An extrusion die comprising:
- a tapering orifice for compressing a first extrudable foam plastic material having a predetermined U-shaped profile at the compression end of said tapering orifice, said tapering orifice positioned to receive said foam plastic material and to communicate said foam material therethrough;
- a first opening communicating with said orifice for applying an extrudable coating of a second extrudable plastic coating material onto said first extrudable foam plastic material within said orifice;
- a second opening communicating with said orifice for applying a third extrudable flexible plastic material therethrough to form a flexible flange attached to said second extrudable coating material.
Parent Case Info
This application is a division of application Ser. No. 08/116/153, filed Sep. 1, 1993, now U.S. Pat. No. 5,538,777.
US Referenced Citations (13)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2358972 |
Feb 1978 |
FRX |
2157614 |
Oct 1985 |
GBX |
Non-Patent Literature Citations (4)
Entry |
"Dual and coextrusion: the happpy marriage of two unlike plastics," by Robert Stedfeld, Modern Extrusion, Feb. 1979, pp. 51-55. |
"Combination of three plastics make one rigid structure for variety of markets," Product Engineering, Dec., 1976, p. 15. |
Supplementary European Search Report, dated Oct. 22, 1996. |
PCT International Preliminary Examination Report, dated Nov. 21, 1995. |
Divisions (1)
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Number |
Date |
Country |
Parent |
116153 |
Sep 1993 |
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