Patents by Inventor Robert E. Jahn

Robert E. Jahn 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).

  • Film folding device, method, and product
    Patent number: 4827694
    Abstract: Disclosed herein is a machine for wrapping filled trays in thermoplastic film, said machine having a film folding device in which the side folding arms and back folding bar move along linear paths in synchronized motion so that the points of coincidence between the back folding bar and the side folding arms define a curve which approximates a diagonal to the tray being wrapped. This film folding device provides uniquely smooth folds on the bottom of a tray which can be readily heat sealed to produce a relatively leakproof package.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: May 9, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Dave L. Owen, Robert E. Jahn
  • Film folding device
    Patent number: 4796405
    Abstract: Disclosed herein is a machine for wrapping filled trays in thermoplastic film, said machine having a film folding device in which the side folding arms and back folding bar move along linear paths in synchronized motion so that the points of coincidence between the back folding bar and the side folding arms define a curve which approximates a diagonal to the tray being wrapped. This film folding device provides uniquely smooth folds on the bottom of a tray which can be readily heat sealed to produce a relatively leakproof package.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: January 10, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Dave L. Owen, Robert E. Jahn
  • Non-smear food package
    Patent number: 4795034
    Abstract: Smearing of fat by fat-containing trayed food products on the interior surface of a thermoplastic overwrap is substantially reduced or eliminated by applying loading forces during a sealing step to the longitudinal edges of the tray containing food product. A tray with a convex bottom is preferred to enhance the quality of the seal. A convex heating plate can be used in conjunction with conventional trays.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: January 3, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Robert E. Jahn
  • Non-smear food package and process for making same
    Patent number: 4722167
    Abstract: Smearing of fat by fat-containing trayed food products on the interior surface of a thermoplastic overwrap is substantially reduced or eliminated by applying loading forces during a sealing step to the longitudinal edges of the tray containing food product. A tray with a convex bottom is preferred to enhance the quality of the seal. A convex heating plate can be used in conjunction with conventional trays.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: February 2, 1988
    Assignee: W.R. Grace & Co., Cryovac Div.
    Inventor: Robert E. Jahn