Patents Assigned to Juwedor GmbH
  • Patent number: 4710276
    Abstract: Substantially hollow jewelry items made from metals, particularly precious metals, can be produced galvanoplastically, in that the metal is electrolytically deposited on an electrically conductive mould core having the spatial contour of the jewelry item, after reaching the desired coating thickness the core is chemically or thermally dissolved and the core material removed through an opening in the metal coating. In order to be able to provide such jewelry items with stones, particularly gems or semiprecious stones, the mould core is provided in the vicinity of the gem mount with a mould surface forming the gem support and nose, web or ring-like projections surrounding the same and that after removing the core material the gem is placed on the gem support and the mount parts formed by the projections are pressed onto the gem.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: December 1, 1987
    Assignee: Juwedor GmbH
    Inventor: Herbert Kull
  • Patent number: 4681664
    Abstract: Pieces of jewelry made from metal, particularly precious metal, are produced galvanoplastically, in that the precious metal is electrodeposited on an electrically conductive mould core having the spatial contour of the piece of jewelry and on reaching the desired coating thickness the mould core material is dissolved chemically or thermally from the jewelry body. In order to produce pieces of jewelry or parts thereof, which are exposed to mechanical stresses, the hollow jewelry body obtained is provided with a solid area made from the same metal in those parts of the jewelry item undergoing more pronounced mechanical stressing during further working or correct use. In this way, e.g.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: July 21, 1987
    Assignee: Juwedor GmbH
    Inventors: Rudolf Eberle, Wilfried Essert, Herbert Kull