A - Human Necessities – 44 – B
Patent
A - Human Necessities
44
B
24/49
A44B 19/10 (2006.01)
Patent
CA 1053879
ABSTRACT A fluid-tight fastener, comprising a pair of flexible closure strips each having a web portion and provided with a marginal strip portion; at least said marginal strip portions being formed from strongly resilient materials; each of said marginal strip portions having at least one solid form-retaining longitudinal rib provided with an undercut interlocking tooth along one side thereof thereby forming an enlarged head, each of said heads having a relatively flattened crown surface and arcuate sides; said undercut tooth side of each of said ribs defining one side of a longitudinal groove which has sides complementary to the sides of the ribs and is receptive of the rib on the other of said strip portions, each of said grooves having an arcuate root surface, each rib of one strip being releasable engaged in a respective groove in the other strip and with said arcuate root surfaces and said flattened crown surfaces forming spaces there- between and with said teeth in interlocked engagement; said ribs being wider than the normal width of the grooves and causing the grooves to enlarge laterally; and a respective bridge joining the opposite sides of each of the grooves and including said arcuate root surface; each of said bridges overlying said crown surface of the associated rib and the bridges being stretched by the lateral enlargement of the grooves as facilitated by each space which permits each arcuate root surface and each stretched bridge to pull in toward a respective flattened crown surface, and the stretched bridge thereby reacting under tension to draw said groove sides tightly against the rib sides; whereby the ribs are sealingly gripped in fluid-tight relation by and between said groove sides.
226054
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