Treatment of raw animal hides and skins

Patent 5096553 Issued on March 17, 1992. Estimated Expiration Date:

February 13, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3779706

3911281

Process of and apparatus for cold-cathode electron-beam generation for sterilization of surfaces and similar applications
Patent #: 4305000
Issued on: 12/08/1981
Inventor: Cheever

System for drying and expanding of flat materials such as leather
Patent #: 4438570
Issued on: 03/27/1984
Inventor: Dokoupil

Process for short-term preservation of rawhides and skins Patent #: 4935031
Issued on: 06/19/1990
Inventor: Munch, et al.

Inventors

Assignee

Ionizing Energy Company of Canada Limited

Application

No. 480339 filed on 02/13/1990

US Classes:

204/157.15, Processes of treating materials by wave energy8/94.1R, TREATMENT OF HIDES, SKINS, FEATHERS AND ANIMAL TISSUES8/94.15, Treatment of untanned skins or hides250/453.11, SUPPORTED FOR NONSIGNALLING OBJECTS OF IRRADIATION (E.G., WITH CONVEYOR MEANS)250/492.3, Ion or electron beam irradiation422/22, Using direct contact with electrical or electromagnetic radiation422/28Using disinfecting or sterilizing substance

Examiners

Primary: Tung, T.
Assistant: Ryser, David G.

Attorney, Agent or Firm

Fleit, Jacobson, Cohn, Price, Holman & Stern

Foreign Patent References

152651 CA 07/13/2012
360903 CA 10/13/2012
499331 CA. 01/13/2012
561924 CA. 08/13/2012
605021 CA. 09/13/1960
708165 CA. 04/13/1965
717935 CA. 09/13/1965
816653 CA 07/13/1969

International Class

C14C 005/00

Foreign Application Priority Data

1986-09-11 CA

Abstract

There is described a new and improved method of treating raw animal hides and skins prior to tanning, wherein the hides and skins are initially washed, trimmed, fleshed and demanured, including the steps of dipping the hides and skins in a dilute antiseptic solution for a predetermined amount of time, removing excess moisture from the hides and skins following dipping, and irradiating the hides and skins with substantially monodirectional electron beams to expose each hide and skin to a dose adjustable within the range of 0.75 to 4.0 Mrads at a dose rate adjustable within the range of 105 to 107 rads/sec.

Other References

Synergistic Effects in the Short-Term Preservation of Hides with Antiseptics and Gamma Radiation, T. A. Du Plessis et al., Radiat. Phys. Chem. vol. 22, No. 3.5, pp. 491-502, 1983
Electron Beam Irradiation of Crust Leather, Fresh Hides and Green Salted Hides, Effect of Preservation and Physical Properties, D. G. Bailey and M. J. Haas
Gamma Irradiation: The Preservation of Hides and Skins and the Sterilisation of Imported Dry and Drysalted Goatskins, M. Dempsey et al
Radiation Curing and Other Hide Preservation Techniques, D. G. Bailey, The Leather Manufacturer, Sep. 1985, p. 2