Patents by Inventor Roger L. Crabtree

Roger L. Crabtree 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: 5451040
    Abstract: In order to avoid ergonomic problems such as carpel tunnel syndrome while improving productivity, an apparatus for feeding signatures to a patent bound binding line is disclosed. The apparatus includes a pocket adjacent a binding line for receiving signatures to be delivered to the binding line. It also includes a signature feeder for feeding signatures from a source in a generally vertical direction to a signature receiving and transferring mechanism. The signature receiving and transferring mechanism has a signature receiving end positioned in generally vertically spaced relation to the source and a signature transferring end positioned generally adjacent to the pocket. The signature receiving and transferring mechanism has a signature conveyor for conveying signatures in a continuous stream from the signature receiving end to the signature transferring end for delivery into the pocket.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: September 19, 1995
    Assignee: R.R. Donnelley & Sons Co.
    Inventor: Roger L. Crabtree