Patents Assigned to W. R. Chestnut Engineering, Inc.
  • Patent number: 4934231
    Abstract: A rotary die-cutting apparatus having cylindrical rollers mounted for rotation on spaced parallel axles. Die plates are mounted on the rollers in tight surface-to-surface contact with the outside surfaces thereof. Each roller has a body with a generally cylindrical outside surface and two longitudinal channels formed therein. The die plates are formed as thin flexible sheets of metal having their ends welded to one of the bars for mounting the sheets on the outside surface of the rollers. A wedge-shaped bar is slideably mounted in the other channel. After the ends of the die plate are welded to the weld bar in butting relation, the die plate is mounted on the roller with the wedge bar removed from its associated channel. After the plate is mounted on the roller, the wedge bar is slid into the channel and gradually forced against the die plate to bring it into surface-to-surface contact with the roller.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: June 19, 1990
    Assignee: W. R. Chestnut Engineering, Inc.
    Inventors: W. Richard Chesnut, Daniel Calligaro, Vincent Trapasso
  • Patent number: 4205596
    Abstract: Rotary die cutting apparatus having novel structure for achieving registration of the die roller and base roller in terms of axis parallelism and rotational positioning is disclosed in the context of apparatus for cutting and scoring cardboard in the manufacture of boxes.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: June 3, 1980
    Assignee: W. R. Chestnut Engineering, Inc.
    Inventor: W. Richard Chesnut