Patents by Inventor Diane M. Robertson

Diane M. Robertson 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).

  • Bonded fibrous casing substrates and method of making same
    Patent number: 5419962
    Abstract: A porous fibrous sheet material for use in the manufacture of food casings and the like is pressed prior to bonding and is bonded with about 10% by weight or less of a non-viscose bonding agent. The pressed and bonded material can be used to form casings having characteristics of thinness and elasticity similar to the thinness and elasticity of viscose-bonded casings, without the environmental problems associated therewith. The non-viscose bonding agent will result in significantly less shrinkage in the base web than results from viscose bonding.
    Type: Grant
    Filed: January 11, 1994
    Date of Patent: May 30, 1995
    Assignee: The Dexter Corporation
    Inventors: Diane M. Robertson, Patrick G. Fay, Ludmila Byalik, Ronald H. Pomeroy
  • Bonded fibrous casing substrates and method of making same
    Patent number: 5300319
    Abstract: A porous fibrous sheet material for use in the manufacture of food casings and the like is pressed prior to bonding and is bonded with about 10% by weight or less of a non-viscose bonding agent. The pressed and bonded material can be used to form casings having characteristics of thinness and elasticity similar to the thinness and elasticity of viscose-bonded casings, without the environmental problems associated therewith. The non-viscose bonding agent will result in significantly less shrinkage in the base web than results from viscose bonding.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: April 5, 1994
    Assignee: The Dexter Corporation
    Inventors: Diane M. Robertson, Patrick G. Fay, Ludmila Byalik, Ronald H. Pomeroy
  • Bonded fibrous sheet material
    Patent number: 5108546
    Abstract: A bonded fibrous sheet material for use in the manufacture of food casings having fibrous base web containing a 10% weight or less bonding system and the bonding system having a composition which includes polyvinyl alcohol (degree of hydrolysis of greater than 95%).
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: April 28, 1992
    Assignee: The Dexter Corporation
    Inventors: Diane M. Robertson, Ludmila Byalik, Ronald H. Pomeroy
  • Fibrous base web bonding system and method
    Patent number: 5063104
    Abstract: A bonded porous sheet material for use in the manufacture of food casing, said material being produced by treating a fibrous web with a thermoplastic film forming material which bonds the fibers of the web and imparts high alkaline strength to the treated wet and subsequently treating the bonded fiber web with a solution of film forming material and an insolubilizing agent for the film forming material.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: November 5, 1991
    Assignee: The Dexter Corporation
    Inventors: Diane M. Robertson, Ludmila Byalik
  • Fibrous substrates for sausage casing and method for producing same
    Patent number: 4952431
    Abstract: A new bonding agent for fibrous substrates used to reinforce food casing is formulated by dissolving cellulose carbamate and an alkaline curing resin in a dilute caustic solution in such a manner that the ratio of carbamate to resin is greater than 1:1 by weight. The preferred resin is a polymeric reaction product of epichlorohydrin and a polyamide. The bonded substrate contains up to 10% by weight of the bonding agent and exhibits a porosity that is not significantly less than that of the base web and a caustic tensile strength greater than 300 grams per 25 millimeters. Casings made from the substrate can use the casing films employed heretofore or a carbamate-resin film formulation.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: August 28, 1990
    Assignee: The Dexter Corporation
    Inventors: Diane M. Robertson, Ronald H. Pomeroy, Alan W. Meierhoefer