Patents by Inventor Gerda Schelkmann, nee Werner

Gerda Schelkmann, nee Werner 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 for the renewal of a worn pneumatic or solid rubbery tire by applying a vulcanized tread and apparatus carrying out this method
    Patent number: 4151027
    Abstract: The invention relates to the retreading of rubber tires wherein a prevulcanized tread is applied to a tire carcass with an interposed vulcanizable bonding layer. The tread and at least the adjacent part of the carcass are enclosed within a close fitting flexible envelope and the resulting blank is subjected to a pressure- and heat-treatment in an autoclave to bond the tread to the carcass. The invention resides in the construction and use of an envelope which is associated with an adjacent reservoir within the autoclave, preferably between the envelope and tire, for the accumulation of possible gaseous inclusions between the inside of the envelope and the blank.
    Type: Grant
    Filed: August 4, 1977
    Date of Patent: April 24, 1979
    Assignee: Vakuum Vulk Holdings Limited
    Inventors: Wilhelm Schelkmann, Gerda Schelkmann, nee Werner