Overmolded spectacle arm extremities
View Patent ↗A stem for eyewear includes an elongated base configured for support on a user's ear and comprising a relatively hard material and a soft pad portion overmolded onto the elongated base. The base comprises at least one through hole and the soft pad portion comprises an anchor portion that is continuous through the through hole. The base also includes an anchor loop on an end that is covered and penetrated by the soft pad portion.
1. A stem for eyewear, comprising:
an elongated base configured for support on a user's ear and comprising a relatively hard material;
a soft pad portion molded onto said elongated base, said soft pad portion composed of a relatively soft material;
wherein said base comprises at least one through hole and said soft pad portion comprises an anchor portion that is continuous through said through hole.
2. The stem according to claim 1 , wherein said anchor portion comprises enlargements on opposite ends of said through hole, said enlargements being of a size greater than an adjacent through hole opening to fix said soft pad portion to said base.
3. The stem according to claim 2 , wherein said at least one through hole of said stem base comprises a loop formed on an end of said stem base and said soft pad portion surrounds an outside of said loop.
4. The stem according to claim 1 , wherein said at least one through hole of said base comprises a loop formed on an end of said base and said soft pad portion surrounds an outside of said loop.
5. The stem according to claim 4 , wherein said anchor portion comprises enlargements on opposite ends of said through hole, said enlargements being of a size greater than an adjacent through hole opening to fix said soft pad portion to said base.
6. The stem according to claim 1 , wherein said soft pad portion comprises a continuous pad on one side, and a plurality of anchor heads on an opposite side.
7. The stem according to claim 1 , wherein said stem base is composed of a hard plastic and said soft pad portion is composed of a thermoplastic elastomer.
8. A method of forming a stem for eyewear, comprising the steps of:
forming a stem base composed of a relatively hard material, said stem base having at least one through hole;
placing said stem base in a mold cavity having a greater volume than said stem base;
selecting a molding material that when hardened is softer than said stem base;
injecting said molding material into said mold cavity to overmold said molded material onto opposite sides of said stem base and through said through hole.
9. The method according to claim 8 , comprising the further steps of:
forming said stem base having a loop at a distal end thereof, and arranging said mold cavity to have a space around said loop such that said molded material is overmolded onto said stem base covering said loop.