Patents by Inventor Enzo Vassarotti

Enzo Vassarotti 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).

  • Vacuum packaging
    Patent number: 5076436
    Abstract: In a vacuum skin package wrinkles and weak spots are avoided by providing a tray as the support or backing member rather than a flat sheet, the angle of the walls as they diverge outwardly being 91.degree. to 160.degree.. Especially useful is such a package when provided with a lid for stacking purposes.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: December 31, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ermanno Bortolani, Enzo Vassarotti
  • Multi-concentration disposable liquid concentrating device
    Patent number: 5045207
    Abstract: A device for concentrating solute-containing solutions, e.g. macromolecular sample solutions, by filtration through a semipermeable membrane, which device enables the user to obtain various different retentate concentrations by placing the device in different positions before use.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: September 3, 1991
    Inventors: Luciano Fecondini, Enzo Vassarotti
  • Method and apparatus for vacuum packaging and package obtained thereby
    Patent number: 4833862
    Abstract: By providing raised peripheral edges, preferably walls, for the supporting member of a vacuum skin package, a superior vacuum package is achieved when a product is vacuum packaged on such a supporting number. Wrinkles and weak spots are avoided. Preferably, the raised edges are formed in-line as the package is made.
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: May 30, 1989
    Assignee: W. R. Grace & Co. - Conn.
    Inventors: Ermanno Bortolani, Enzo Vassarotti
  • Process for making a vacuum skin package and product formed thereby
    Patent number: 4611456
    Abstract: The invention relates to a method of forming containers useful in vacuum packaging applications which require that the packaged product be wrapped in an air-impervious enclosure.According to one aspect of the invention, the method comprises a step wherein a substrate of an air pervious, semipervious or impervious material is mold formed, and a subsequent step wherein an impervious film is applied on the molded substrate and adhered thereto to produce an impervious substrate. In another aspect, a product is placed on the impervious substrate and enclosed by an impervious film in a vacuum skin packaging process.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: September 16, 1986
    Assignee: W. R. Grace & Co., Cryovac Div.
    Inventors: Mario Gillio-tos, Enzo Vassarotti, Henry G. Schirmer, Gottfried von Bismarck
  • Vacuum packaging
    Patent number: 4537011
    Abstract: The invention provides a method of vacuum packing by defining a "dummy product" 17 alongside a product article 14 on a support sheet so that any "webbing" 18 is to the side of that projection 17 which faces away from the adjacent product article 14. That projection 17 can subsequently be trimmed to leave a webbing-free pack. Cutting down webbing reduces the risk of leakage of the pack. Preferably the height of the projection 17 is adjusted in response to the height of a product article 14 so that the extent of such webbing 18 is at a minimum.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: August 27, 1985
    Assignee: W. R. Grace & Co., Cryovac Div.
    Inventors: Ermanno Bortolani, Sandro Brembilla, Enzo Vassarotti