Patents by Inventor William W. Allan

William W. Allan 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: 4789291
    Abstract: An apparatus is provided for automatically denesting an article from a stack of nested articles. The apparatus includes a frame supporting the stack of articles in an elevated downwardly inclined position relative to a conveyor unit defining a substantially horizontal plane. Adjustably mounted on the frame for controlled movement along a path inclined upwardly towards the lower end article of the supported stack is a carrier unit. Carried on the carrier unit are elements adjustable independently of the unit between operative and inoperative modes. When the carrier unit approaches the upper limit of its upward movement along the path, the elements carried thereby are adjusted to an operative mode and frictionally engage the lowermost article of the stack and cause the latter to be denested from the stack as the carrier unit commences its downward movement along the path.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: December 6, 1988
    Assignee: Packaging Corporation of America
    Inventor: William W. Allan