Patents by Inventor Ernst D. Nystrand

Ernst D. Nystrand 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).

  • Method of lapping webs
    Patent number: 4279411
    Abstract: A method of lapping webs wherein two series of web sections are advanced, reversely folding a portion of each section about a transverse line adjacent the section leading edge to lap a portion of the preceding section adjacent the trailing edge, and retarding one series relative to the other.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: July 21, 1981
    Assignee: Paper Converting Machine Company
    Inventor: Ernst D. Nystrand
  • Method and apparatus for zig-zag folding
    Patent number: 4205836
    Abstract: A method and apparatus for zig-zag folding in which a slotted receiving cage along with separator means are provided for exact count separation.
    Type: Grant
    Filed: December 7, 1978
    Date of Patent: June 3, 1980
    Assignee: Paper Converting Machine Company
    Inventor: Ernst D. Nystrand
  • Method and apparatus for zig-zag folding
    Patent number: 4204669
    Abstract: A method and apparatus for zig-zag folding in which stack lean can be corrected by angularly shifting one gripper-tucker member relative to the other where the gripper anvil tip and the gripper element tip are each a constant distance from the tucker tip during entry of the tucker into the gripper.
    Type: Grant
    Filed: December 7, 1978
    Date of Patent: May 27, 1980
    Assignee: Paper Converting Machine Company
    Inventor: Ernst D. Nystrand
  • Method of lapping webs and product
    Patent number: 4163548
    Abstract: A method of lapping webs to provide a product suitable for zig-zag folding or rewinding wherein a web is advanced from each of a pair of parent rolls, the web transversely severed into discrete identical sheets which are then lapped no more than one-third the length of each sheet, and thereafter the lapped sheets from each parent roll are combined in staggered reverse relationship whereby all exposed edges face one direction.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: August 7, 1979
    Assignee: Paper Converting Machine Company
    Inventor: Ernst D. Nystrand