Patents by Inventor Henry Lemaignen

Henry Lemaignen 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).

  • Process and apparatus for the formation of fiber felts
    Patent number: 4592769
    Abstract: A process for the improvement in the distribution of fibers in a fiber felt formed by retention of fibers entrained in a gaseous current is disclosed, along with apparatus suitable for practicing that process. The gaseous current is caused to pass through an oscillating guide duct, the frequency, amplitude and median direction of the oscillation, or at least one of those aspects, may be automatically regulated and altered in response to sensed variations in the distribution of the fiber. The distribution variations are measured by determining relative absorption of radiation across different portions of the width of the felt in comparison with the mean value of that distribution.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: June 3, 1986
    Assignee: Isover Saint-Gobain
    Inventor: Henry Lemaignen