초록 ▼

Profiled bead and recess fasteners have mating, complementary parts. One part has a bead which engages in a recess in the other. When engaged, there is resistance to separation under tension forces. The recess has an entrance for the bead which is smaller in section than the bead but which is adjust

Profiled bead and recess fasteners have mating, complementary parts. One part has a bead which engages in a recess in the other. When engaged, there is resistance to separation under tension forces. The recess has an entrance for the bead which is smaller in section than the bead but which is adjustable by local deformation to pass the bead by flexure of one side of the recess by the bead which comes out of contact with the other side. The local deformation can be produced by finger pressure and so the fastener can be operated without the usual slider, although a slider can be provided for some purposes.

대표청구항 ▼

A profiled bead and recess fastener comprising mating, complementary parts of which one part has a recess and the other part has a bead which engages in the recess to maintain the fastener closed against tension forces so directed as to tend to separate the two parts, the recess having in cross sect

A profiled bead and recess fastener comprising mating, complementary parts of which one part has a recess and the other part has a bead which engages in the recess to maintain the fastener closed against tension forces so directed as to tend to separate the two parts, the recess having in cross section, an entrance for the bead, which is smaller in cross section than the bead cross section whereby to retain the bead in the recess, the cross section of said entrance being adjustable by local elastic deformation to permit the bead to enter or leave the recess laterally, such local deformation to permit the bead to leave the recess being caused by flexure of one side of the recess by the bead whilst the bead comes out of contact with the other side of the recess without applying tension forces between the two parts.