Patent ID: 7080678

Claim:
A method of producing a hollow metal jewelry ring comprising the steps of: providing a mold with a vertically oriented mold cavity and having a shape consistent with an external shape of the ring to be produced; providing a core insert having a shank with an arcuate extent of between about 200° and 360° and an insert with a plurality of inwardly directed spokes attached to said shank and having cross sections defining a preselected aperture size , as well as being formed of a soluble material and having a shape consistent with but slightly smaller than the ring to be produced; vertically positioning the core insert in the mold cavity of said mold; introducing a molten material into said vertically oriented mold cavity in order to surround the vertically oriented core insert and thereby fill said mold cavity; hardening the molten material in order to form a reproduction of the ring to be produced; removing the ring reproduction from the mold cavity; separating the core insert from the reproduction in order to leave behind a reproduction comprising a shank with internally running hollow cavity and a finger facing surface having a plurality of openings leading into said cavity; and casting said hollow metal jewelry ring by utilizing the reproduction, said hollow ring having a toroidal shank with an interior hollow cavity and a plurality of radially oriented opening having said aperture size and formed by said spokes.