A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 11/08 (2006.01) A61F 11/10 (2006.01)
Patent
CA 2234163
An acoustical hearing device (10) is presented, comprising a foam (12), and at least one porous component (14) which is mechanically bonded to the foam (12). The mechanical bonding of the porous component (14) arises during manufacture wherein the porous component (14) is placed into a mold cavity as an insert, and a foam (12) is formed within the mold so as to allow controlled penetration of the porous component during foaming. Importantly, entrapped air in the closed cavity may pass through the porous component during manufacture, thereby allowing the porous component to act as a mold vent. A method of manufacture of the hearing protective device of the present invention is also presented.
Le protecteur auriculaire (10) de la présente invention contient une mousse (12) et au moins un composant poreux (14) qui est mécaniquement assemblé à ladite mousse (12). L'assemblage mécanique du composant poreux (14) se produit au cours de la fabrication lorsque l'on place ce composant poreux (14) dans une cavité de moule comme un insert, et que l'on forme une mousse (12) à l'intérieur du moule de façon à permettre une pénétration maîtrisée du composant poreux au cours de la formation de la mousse. Il est important que l'air piégé dans la cavité fermée puisse traverser le composant poreux pendant le processus de fabrication, ce qui permet audit composant poreux de jouer le rôle d'organe d'aération du moule. L'invention se rapporte également à un procédé de fabrication du protecteur auriculaire décrit ci-dessus.
Cabot Safety Intermediate Corporation
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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