Patents by Inventor Doris Leader

Doris Leader 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).

  • Patent number: 4473432
    Abstract: Dot Hot Stapling is provided wherein articles such as bags can be made of interwoven or knitted plastic material and wherein the interfitting or interwoven strips are adapted to be sealed together so as to prevent unraveling and to provide an economical method of making such articles. With the present invention, crossing points of tape type fabrics are attached together with dot sealing or dot hole edge sealing by any means that will accomplish this function. The dot heat sealing may be accomplished in any of plurality of ways such as by using heated needles, co-acting rollers with heated prongs, pulsed laser, interrupted heated air jets, a pulsed spark arrangement, intermittent ultrasound, ultrasonics, or the like.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: September 25, 1984
    Inventors: Harold Leader, Doris Leader