Patents Assigned to Firma Carl Fruedenberg
  • Accordion filter pack that is bendable in only one direction
    Patent number: 5792228
    Abstract: An accordion filter pack that is bendable in only one direction and is made of a flexible filter medium, the folds of which are capped in the lateral direction at both ends by a flexible sealing strip and which can be sealed by the sealing strip with respect to a housing. The accordion filter pack is joined on its longitudinal sides to a least one reinforcing element. The reinforcing element is joined to the sealing strip and consists of a flat, flexible planar structure that extends transversely to the openings of the folds.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: August 11, 1998
    Assignee: Firma Carl Fruedenberg
    Inventors: Jurgen Fath, Harald Betz