Ear plug as well as a method and apparatus for the production th

Details Ear plug as well as a method and apparatus for the production th Ear plug as well as a method and apparatus for the production th

1984-10-02

1986-09-30

Phynes, Lucille M.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to form or reshape preform

425117, 425126R, 425393, 425398, 425400, A23G 120, A23G 312, A23P 100, B21C 300

Patent

active

046144870

ABSTRACT:
The ear plug (40) includes an elongate body with a rounded tip portion and of an elastic material enveloped by a deep-drawn sheath (41) of thin flexible plastics film material. Rearwardly the plug preferably has a neck portion from which the sheath projects in the form of a stiffer collar or flange. Production of the ear plug includes deep-drawing a thermoplastic film or foil into a sheath with desired thickness distribution, and filling the sheath with elastic material (53). Filling may take place simultaneously with deep-drawing, the body of elastic material constituting a die for deep-drawing in a forming hole (45), or after the deep-drawing. In the latter case, an elastic die body is used to advantage, the shape of which generally corresponds to that of the finished plug, for deep-drawing in a forming hole suited to the die body.

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