Patent ID: 9021754
Filing Date: 2015-05-05
Classification: E04B,E06B

Abstract:
1. An impregnated foam sealing strip for sealing a window frame, the foam sealing strip comprising: two opposite narrow sides, defining a height, that in a fitted state, respectively, face one of an inner side and an outer side of the window frame; and two wide sides, defining a width, suitable for abutting a side of the window and a reveal, respectively, in a recovered state, at least one of the narrow sides being formed as a high region having a greater height from a base surface on one of the wide sides than a height of a low region, the high region and the low region being joined in a direction of the width, the high region and the low region running in alignment with a longitudinal direction of the foam sealing strip and, in the recovered state, a surface profile which is curved in cross-section and formed in a tiered manner between the high region and the low region being provided on the surface opposite from the base surface to form the high region and the low region as a single and unitary part, and the base surface being a planar surface and extending over the entire width, the foam sealing strip being a compressible material that is compressible under a pressure and that recovers to the recovered state when the pressure is released, the foam being impregnated for delayed recovery to the recovered state when the pressure is released, the base surface being formed by the impregnated foam, the low region height being between 60% and 80% of the high region height so that a height of the curved surface profile is between 40% and 20% of the height of the high region, and the low region having a dimension which is one-tenth to four-tenths of the width of the wide sides, the foam sealing strip being adapted to be compressed in a uniform sealing gap between two surfaces in a final assembled state, such that the high region, the low region, and the curved surface profile have substantially the same heights when the foam sealing strip is compressed between the two surfaces in the final assembled state, and a permanent compression of the foam sealing strip is greater in the high region at the narrow side than in the low region at the narrow side, thereby creating a desired lower vapor permeability from the high region to the low region.