Coarse Hair-removing Patents (Class 69/24)
Clipping (Class 69/25)
Plucking (Class 69/26)
  • Ecofriendly bio-process for leather processing
    Patent number: 6708531
    Abstract: The present invention relates to an eco-friendly beam house process for de-hairing of leather using commercially available enzymes that obviates the use of lime and other alkalis. The present invention also provides an alternate process for opening the fibers of leather using commercially available enzymes. The present invention further provides a three-step process for tanning hide or skin in a narrow pH range of from about 7.5 to about 8.5.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: March 23, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Palanisamy Thanikaivelan, Jonnalagadda Raghava Rao, Balachandran Unni Nair, Thirumalachari Ramasami
  • Procedure for removing the layer of hairy elements from a complete animal skin
    Patent number: 4770010
    Abstract: The present invention is drawn to a method of removing hair from an animal pelt in which liquified gas is applied to the fleshy side of the pelt to freeze the pelt to a temperature at which hair pores of the skin open. The application of the liquid gas to the pelt may be facilitated by placing the pelt on a conveyor having perforations, applying suction to the pelt through the perforations to secure the pelt to the conveyor, and applying the liquified gas to the pelt through the perforations. Furthermore, the application of the liquified gas to the pelt may be carried out in two phases. In the first phase, the pelt is frozen to a temperature between 0.degree. and -20.degree. Celsius. In the second phase, the pelt is frozen to a temperature between -20.degree. and -220.degree. Celsius. Finally, after the pelt has been frozen, the hair may be removed with an appropriate hair removing device such as a comb, blade or brush.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: September 13, 1988
    Inventors: Juan Cots Tana, Esteban Cots Tana
  • Laser means and method
    Patent number: 4578558
    Abstract: A method of severing fibre from a fell comprises moving a fell in a longitudinal direction and traversing the fell with a laser beam focused onto the fibre adjacent the skin of the fell.
    Type: Grant
    Filed: January 23, 1984
    Date of Patent: March 25, 1986
    Inventor: John E. Clegg
  • Machine for depilating the skins of slaughtered animals
    Patent number: 4267713
    Abstract: A machine for removing the hair from animal hides, comprises an upwardly open vat and a horizontal perforated plate arranged in the lower part of the vat and rotationally driven on a central pivot by suitable means. The plate is provided on its surface in contact with the material to be treated with sharp edges formed on the contour of said perforations, and bounded peripherally by a fixed perforated cylinder, defining with the inner wall of the vat a coronary space ensuring the removal of the hair stripped off and projected by centrifugal force into the openings of said cylinder.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: May 19, 1981
    Inventor: Claude Tournier