Patent ID: 8968613
Filing Date: 2015-03-03
Classification: A61F,B29C,B29K,B29L,C08J

Abstract:
1. A method of making an earplug comprising the steps of: covering an elongate core with an outer layer, wherein the elongate core comprises a first material and the outer layer comprises a second material, the second material comprising an unactivated foaming agent; positioning at least a portion of the outer layer and the elongate core in a mold; and activating the foaming agent of at least a portion of the outer layer such that the outer layer at least partially expands to conform to a shape of the mold and the outer layer includes an expanded sound attenuating portion and a stem portion bonded to the elongate core; wherein the stem portion serves as a handle which may be gripped by a user, and the shape of the sound attenuating portion differs from the shape of the stem portion.