Patents Assigned to Grafosol S.p.A.
  • Device for illuminating and adjusting the amount of light in machines for electrostatically preparing printing matrices
    Patent number: 4171905
    Abstract: Device for illuminating and adjusting the amount of light in machines for electrostatically preparing printing matrices, wherein at least one pair of light sources are arranged on a driven carriage, also carrying a selectively shaped diaphragm, the aperture of which varies as a function of the carriage position.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: October 23, 1979
    Assignee: Grafosol S.p.A.
    Inventor: Vittorino Boschet
  • Sheet supporting drum during development in machines for electrostatically preparing printing matrices
    Patent number: 4161358
    Abstract: A sheet supporting drum during development in machines for electrostatically preparing printing matrices is disclosed. The drum is provided with front or head and rear or tail grippers, of which the rear or tail gripper is displaceable, wherein the latter comprises a fillet or section carried by arms passing through slots in the drum shell and mounted on a rotable common shaft carried by bearing means that can be angularly displaced about an axis coincident with the drum axis of rotation.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: July 17, 1979
    Assignee: Grafosol, S.p.A.
    Inventor: Vittorino Boschet
  • Matrix supporting devices in electrostatic development apparatus
    Patent number: 4120263
    Abstract: Improvements to a matrix supporting device in electrostatic development apparatus, wherein the pliers retaining the matrix rear portion can be moved along a cylindrical surface to which said matrix is intended to adhere. A cam controlled oscillating support provides for a magnetic roller and its associated toner carrying tray to be moved away from the cylindrical surface to allow for passage of the pliers.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: October 17, 1978
    Assignee: Grafosol S.p.A.
    Inventor: Vittorino Boschet
  • Matrix supporting device in electrostatic development apparatus
    Patent number: 4026242
    Abstract: A matrix supporting device in electrostatic developing apparatus, wherein the matrix is moved to a position in front of the magnetic developing roller while adhering to a rotable cylindrical surface, the axis of rotation of which is at a fixed spacing from that of the roller.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: May 31, 1977
    Assignee: Grafosol S.p.A.
    Inventor: Vittorio Boschet