Patents by Inventor Heinz Lammermann

Heinz Lammermann 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 of making a filter
    Patent number: 4056876
    Abstract: A filter element is fitted into a filter can and a mass of hot-melt adhesive between the filter element and the can is thermally activated and allowed to cure to hold this filter element in place. A bead of hot-melt adhesive is applied to the rim of the can and the edge of a cover is applied over this bead which may be heated to its softening range. Thereafter the rim of the can is bent over the edge of the cover and this bent-over rim is heated to the melting point of the hot-melt adhesive so as to secure the two together once the hot-melt adhesive has cured.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: November 8, 1977
    Assignee: Robert Bosch GmbH
    Inventor: Heinz Lammermann