Patent EA-003881-B1 (EA)
Title: Hollow plastic section
Inventor: BIELEFELD HANS-WALTER
IPC: B32B3/10
Filed: 2000-07-12
Abstract: 1. Hollow plastic section with embedded reinforcement elements, preferably frame section for windows and doors, characterized in that it includes several inner chambers which are bounded by partition walls (7, 8, 9, 14, 15, 16, 17, 18) extending in longitudinal direction of the section, and stripshaped stiffening elements which are not interconnected and form reinforcement elements. 2. Hollow plastic section according to claim 1, characterized in that the reinforcement elements are made of metal. 3. Hollow plastic section according to the preamble of claim 1, characterized in that the stiffening elements are formed of embedded bands or strips of fiber-reinforced plastic, and that several inner chambers with small cross section are provided which are bounded by partition walls (7, 8, 9, 14, 15, 16, 17, 18) extending in longitudinal direction of the section. 4. Hollow plastic section according to claim 3, characterized in that the stiffening elements (4, 5, 11, 12, 25) are provided in the length region or in the area between the longitudinal edges with means such a roughenings, knurlings, punchings or the like, for realizing a positive fit. 5. Hollow plastic section according to one of the claims 1 to 4, characterized in that the stiffening elements (4, 5, 11, 12, 25) have a rectangular cross section. 6. Hollow plastic section according to one of the claims 1 to 3, characterized in that the stiffening elements (4, 5, 11, 12, 25) are made of metal and have a surface with high radiation reflection. 7. Hollow plastic section according to one of the claims 1 to 6, characterized in that the surface of the stiffening elements (4, 5, 11, 12, 25) is provided with a reflective coating. 8. Hollow plastic section according to claim 6, characterized in that the stiffening elements (4, 5, 11, 12, 25) are made of aluminum and are anodized. 9. Hollow plastic section according to one of the claims 1 to 8, characterized in that the stiffening elements (4, 5, 25) are provided in the length region or in the area between the longitudinal edges with means such a roughenings, knurlings, punchings or the like, for realizing a positive fit. 10. Hollow plastic section according to claim 9, characterized in that the outwardly open punchings (36) at the one longitudinal edge of the stiffening elements (4, 5, 25) is in offset disposition to the punchings of the other longitudinal edge, and that the portion (37) remaining between the punchings covers a same area as the punching. 11. Hollow plastic section according to one of the claims 1 to 10, characterized in that the at least two opposite stiffening elements (4, 5, 25) are secured to inner surfaces of the exterior walls (2, 3), which form the visible surfaces of the hollow section, or are embedded in these exterior walls. 12. Hollow plastic section according to one of the claims 1 to 11, characterized in that the stiffening elements (4, 5) are secured to the partition walls. 13. Hollow plastic section according to one of the claims 1 to 12, characterized in that the stiffening elements (25) form partition walls between two inner chambers. 14. Hollow plastic section according to one of the claims 11 to 13, characterized in that the strip-shaped stiffening elements (4, 5, 25) have lateral boundary planes A which do not intersect any visible surfaces of the hollow section. 15. Hollow plastic section according to claim 14, characterized in that the strip-shaped stiffening elements (4, 5, 25) have a sufficient distance to the visible surfaces of the hollow plastic section, so that the end zone of the stiffening elements can be worked on with a tool, without damage to the visible surfaces of the hollow section. 16. Hollow plastic section according to one of the claims 1 to 15, characterized in that in addition to the vertically arranged strip-shaped stiffening elements (4, 5) there are provided horizontally extending stiffening elements (11, 12) at a distance to the vertical stiffening elements. 17. Hollow plastic section according to claim 16, characterized in that the horizontal stiffening elements (11, 12) are provided only in the area of a section portion. 18. Hollow plastic section according to one of the claims 1 to 17, characterized in that it includes a receiving pocket (35) for a loosely inserted attachment profile for a fitting.