PAIRED EARPLUG CONSTRUCTION AND METHOD FOR FABRICATION THEREOF
09-02-1982 дата публикации
Номер:
CA1117870A
Автор: WACKER ALBERT R, WACKER, ALBERT R.
Принадлежит: E A R CORP, E-A-R CORPORATION
Контакты:
Номер заявки: 325389
Дата заявки: 11-04-1979
Disclosed herein is a tethered earplug construction comprising a pair of plasticized thermoplastic foam earplugs tethered together by one or more flexible plasticized thermoplastic cord elements. Attachment of the cord element to the earplug is achieved by ultrasonic welding.