Method of manufacturing a sealing gasket, in particular a window run for a motor vehicle, and to a gasket manufactured in this way
First Claim
1. A method of manufacturing a sealing gasket, in particular a hidden frame type window run for a motor vehicle, the method consisting in placing in the gasket that is made from thermoplastic materials, at least one anti-shrinkage element that is placed in a position that is determined so as to obtain automatically and naturally a gasket that is curved after it has been extruded and has cooled down, and the method further consisting in acting on the shrinkage ability of the materials constituting the gasket in order to obtain varying amounts of curvature.
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Abstract
The invention relates to a method of manufacturing a sealing gasket, in particular a hidden frame type window run for a motor vehicle, the method consisting in placing in the gasket that is made from thermoplastic materials, at least one anti-shrinkage element that is placed in a position that is determined so as to obtain automatically and naturally a gasket that is curved after it has been extruded and has cooled down, and the method further consisting in acting on the shrinkage ability of the materials constituting the gasket in order to obtain varying amounts of curvature.
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Citations
19 Claims
- 1. A method of manufacturing a sealing gasket, in particular a hidden frame type window run for a motor vehicle, the method consisting in placing in the gasket that is made from thermoplastic materials, at least one anti-shrinkage element that is placed in a position that is determined so as to obtain automatically and naturally a gasket that is curved after it has been extruded and has cooled down, and the method further consisting in acting on the shrinkage ability of the materials constituting the gasket in order to obtain varying amounts of curvature.
- 13. A sealing gasket forming a hidden frame type window run, for example, the gasket comprising a mounting clip of U-shaped right section with first and second mutually parallel limbs, a main leg, and a secondary leg which extend perpendicularly from the second limb of the clip, and sealing lips towards the ends of said legs, and an anti-shrinkage element placed in the clip, and in which the thermoplastic materials used for making the gasket present a shrinkage gradient that decreases going from the clip towards the sealing lips.
Specification