Patents Assigned to United Patents Trust Reg.-U.P.T.
  • Method and apparatus for removing waste pieces from a pre-cut sheet
    Patent number: 4213378
    Abstract: A method for removing waste pieces from a pre-cut sheet having cut portions and waste pieces therein, includes the steps of conveying the sheet and stripping needles along respective substantially parallel rectilinear paths and at the same rate of travel, impaling the waste pieces on the needles during the conveying step, and thereafter separating the waste pieces by moving the needles rotatively relative to the cut portions.
    Type: Grant
    Filed: June 2, 1978
    Date of Patent: July 22, 1980
    Assignee: United Patents Trust Reg.-U.P.T.
    Inventor: Jean-Claude Rossollin
  • Method for folding sheet-shaped plastic material and folded sheet-shaped plastic material obtained by carrying out this method
    Patent number: 4183891
    Abstract: Method for forming a folded sheet of plastic with reinforcing ribs disposed transverse to the line of fold. The line of fold or weakening line is provided with a plurality of weakening grooves separated by unweakened material of the sheet. When the sheet is folded, unweakened material is drawn out to form reinforcing ribs transverse to the weakening line and in the dihedral angle of the fold. The length of the unweakened material between the grooves is dimensionally variable to provide an adjustable resistance to folding.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: January 15, 1980
    Assignee: United Patents Trust Reg.-U.P.T.
    Inventor: Jean-Claude M. M. Rossollin