Method for ultrasonically welding plasticized thermoplastic poly

Details Method for ultrasonically welding plasticized thermoplastic poly Method for ultrasonically welding plasticized thermoplastic poly

1979-09-10

1981-10-06

Wityshyn, Michael G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

128152, 156 731, 264 23, A61F 1102, B23K 1904

Patent

active

042933552

ABSTRACT:
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.

REFERENCES:
patent: Re29487 (1977-12-01), Gardner, Jr.
patent: 2230738 (1941-02-01), Baum
patent: 3625787 (1971-12-01), Radl et al.
patent: 3837950 (1974-09-01), Reimels

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