Patents by Inventor Roland F. Perolls

Roland F. Perolls 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).

  • Methods of and apparatus for closing bag mouths
    Patent number: 4370845
    Abstract: The disclosure relates to methods and apparatus for closing a bag mouth of a bag formed from a heat weldable material after filling the bag through the open mouth thereof. The bag mouth is supported from within the mouth by flat elements held apart across the mouth to draw the mouth into an elongate form and then the sides of the mouth are pressed together between an elongate heating element and an elongate anvil and the heating element is activated to heat weld the sides of the mouth together to close the mouth.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: February 1, 1983
    Inventors: Roland F. Perolls, Norman R. Steel