Patents by Inventor Kalevi K. Anttonen

Kalevi K. Anttonen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for bending and tempering a glass sheet
    Patent number: 5340375
    Abstract: The invention relates to a method and apparatus for bending and tempering a glass sheet. From a preheating furnace a glass sheet is advanced into a positioning and bending station supported by a gas bed between the stations. In the positioning and bending station the glass sheet is lifted by a ring mold from a gas bed and the glass sheet is heated for gravitational bending to close to a final profile. The glass sheet is pressed to its final profile or shape by an overhead press plate, which also serves as a vacuum pickup for carrying the bent glass sheet into a station for heating for tempering. After tempering, the glass sheet is advanced into a quenching station.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: August 23, 1994
    Assignee: Tamglass Engineering Oy
    Inventor: Kalevi K. Anttonen