Ear-plug

Claim 1

An ear protecting plug comprising an elastic, plug-like body of fibrous material, at least a part of said body being adapted for insertion into an auditory canal of an ear, and a casing surrounding at least said part of the body, said casing being adapted for insertion in the auditory canal, having a surface with a friction coefficient substantially lower than that of the fibrous material and being a thin plastic film wherein at least part of the plastic film includes means to permit pressure equalization at the time of introduction of the plug into a canal and to permit penetration of moisture, said means including cuts which permit the formation of passages through the plastic film, the part of the plug-like body being adapted for insertion into an auditory canal of an ear being substantially cylindrical and the plug-like body further including an expanded end part adapted to at least partially fill out the concha of the ear outside the auditory canal, the plastic film being wrapped at least around the part of the plug-like body adapted to be inserted into an auditory canal thereby producing lengthwise folds in the casing, a circumferential heat weld in the plastic film being positioned at the junction of the substantially cylindrical part and the expanded end part to fix the plastic film and weld it to the fibrous material.