Patents by Inventor Karl E. Liechty

Karl E. Liechty 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: 4428667
    Abstract: For a document sheet feeding and registration apparatus and method for deskewing and registering a document sheet relative to a registered copying position on a copier platen by feeding it against a sheet aligning document registration member, there is disclosed apparatus for initially feeding the document sheet towards the registration means with a first document sheet feeder exemplified by a widely transversely spaced pair of high friction sheet feeding rollers, which resist skewing of the document sheet, and removing the first document sheet feeder from the document sheet after its lead edge is engaged by a second document sheet feeder and before the document sheet engages the registration edge stop so that final skewing control of the document sheet is only by the second document sheet feeder, this second document sheet feeder being a single sheet feeding roller positioned centrally of the document sheet lead edge area and positioned closely adjacent the registration edge.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: January 31, 1984
    Assignee: Xerox Corporation
    Inventors: Russell L. Phelps, Jeffrey L. Sisson, Karl E. Liechty
  • Patent number: 3941376
    Abstract: An automatic document handler for supplying documents singly to the platen of a processing apparatus such as a copying machine. Following copying, each document is returned to the document supply where the used documents are kept separated from documents awaiting copying by means of a resettable bail bar. To position the documents properly for copying, the document handler includes a register against which the document trailing edge is abutted through reversal of the platen transport belt. To allow the document to be removed and the platen cleared for the next document, means are provided to remove the register and lower a document deflector into an intercept position, the deflector then serving to guide the document into a predetermined return path back to the document supply without interfering with movement of the next document forward.
    Type: Grant
    Filed: May 8, 1972
    Date of Patent: March 2, 1976
    Assignee: Xerox Corporation
    Inventors: Karl E. Liechty, David C. Lasher