Patents by Inventor Stefano De Bernardi

Stefano De Bernardi 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).

  • High torque drive means for two very close shafts which are also subjected to strong axial thrusts and application thereof to a double screw extruder
    Patent number: 4796487
    Abstract: An apparatus for rotationally driving two closely spaced shafts comprises a driven gear on each shaft and two drive apparatus for driving each of the driven gears. The shafts are constrained to rotate at the same speed by interengaging teeth of the driven gears or by an idler gear. Four indpendent motors are used to drive the shafts. If the shafts are not parallel, the driven gears may be conical. Alternatively, the driven gears may be cylindrical, and each shaft may have thereon a conical gear, the conical gears being sized and positioned to mesh.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: January 10, 1989
    Assignee: Bausano & Figli S.p.A.
    Inventor: Stefano De Bernardi
  • High torque drive means for two closely spaced shafts which are also subjected to strong axial thrusts and application thereof to a double screw extruder
    Patent number: 4682510
    Abstract: An apparatus for rotationally driving two closely spaced shafts comprises a driven gear on each shaft and two drive apparatus for driving each of the driven gears. The shafts are constrained to rotate at the same speed by interengaging teeth of the driven gears or by an idler gear. Four independent motors are used to drive the shafts. If the shafts are not parallel, the driven gears may be conical. Alternatively, the driven gears may be cylindrical, and each shaft may have thereon a conical gear, the conical gears being sized and positioned to mesh.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: July 28, 1987
    Assignee: Bausano & Figli S.p.A.
    Inventor: Stefano De Bernardi
  • Process and apparatus for joining protective plastic films to an extruded plastic sheet, with the aid of an auxiliary plastic film
    Patent number: 4661186
    Abstract: A process and apparatus are described wherein a honeycombed sheet of plastic is extruded from an extruder and at least one protective film of plastic is joined onto at least one of its surface layers, the protective film having a softening temperature lower than that for extruding the sheet. The protective film, combined with the auxiliary film or support film, is laid onto the surface of the sheet leaving the extruder; then the sheet, protective film and support film are subjected to the calibrating and cooling stage; and lastly the support film is separated from the sheet. The protective film has now been made an integral part of the sheet, thereby to produce, for example, a protected honeycombed sheet.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: April 28, 1987
    Assignee: Carbolux S.p.A.
    Inventor: Stefano De Bernardi