Patent ID: 6205817
Filing Date: 2001-03-27
Classification: C03B

Abstract:
A method of manufacturing a hollow cone having an open side and a cone tip, said hollow cone being formed in a first mold portion, said first mold portion having an escape space, said method comprising the steps of:introducing a viscous material into said first mold portion;providing a gas pressure in said escape space so as to at least initially prevent said viscous material from flowing into said escape space;introducing a second mold portion and contacting said viscous material therewith such that said viscous material is intermediate said first and second mold portions;forming said open side of said hollow cone by initially pressing said first and second mold portions together while said gas pressure prevents said viscous material from flowing into said escape space; andcontinuing to press said first and second mold portions together until a pressure is created in the viscous material sufficient to cause some of said viscous material to flow into said escape space.