Patents by Inventor W. C. Willis

W. C. Willis 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).

  • Device for attaching a fitment to a container
    Patent number: 4540100
    Abstract: A device for attaching a fitment to an open mouth container and for tamper-evident sealing of the fitment with the fitment attached thereto. The device includes a closure portion having a first skirt portion adapted for rolling a thread to engage a cooperating thread on the fitment. Other skirt portions are adapted for rolling such portions into engagement with the fitment and the container to firmly attach the fitment to the container, and a fracturable line of weakening is provided between the first skirt portion and the other skirt portions to provide evidence that the container has been opened upon a first unthreading of the closure.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: September 10, 1985
    Assignee: Aluminum Company of America
    Inventor: W. C. Willis