US Patent No: 5,084,119
Number of patents in Portfolio can not be more than 2000
Lap seam and method forming same
Stats
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Jan 28, 1992
Issued date -
Oct 17, 1990
filing date -
07/599,318
serial no -
Expired
status
Importance
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Abstract
A liquid tight seam for an overlapping seam of two waterproof elastomeric membranes of a roof covering and the method of forming the seam. The overlapped edge portions of the two membranes are sealed by an intervening adhesive layer. A second adhesive layer is applied along the seam and covers adjacent exposed areas of the two membranes and stepped edges thereof which form the seam. Next, a bead of sealant is applied along the seam and over adjacent portions of the second adhesive layer. This seam and method eliminates washing and cleaning the seam areas with solvents before applying the sealant thereby enhancing seam quality and strength.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,671,975 Radiant heat reflective inflatable structure | 3 | 1983 | |
| 4,654,098 Radiant heat reflective inflatable structure and methods for making same | 8 | 1985 | |
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| 4,192,116 Taped and double glued rubber joint | 19 | 1978 | |
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| 4,855,172 Adhesive composition laminate with butyl rubber | 36 | 1987 | |
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| 4,849,268 Lap seam for liquid containment systems and method of forming | 9 | 1988 | |
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| 4,445,955 Welding of plastics material | 4 | 1981 | |
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| 4,379,114 Method of joining waterproof sheets, and their joint structure | 22 | 1981 | |
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| 4,774,115 Bituminous strip for bridge-sealing | 4 | 1987 | |
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| 4,289,552 Method for the continuous welding of thermoplastic sheets | 14 | 1978 | |