Patents by Inventor Ettore Quattrini

Ettore Quattrini 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).

  • Needle printing head
    Patent number: 6561707
    Abstract: A needle printing head comprising a support (11) able to axially guide a plurality of printing needles (15), each of which has one end attached to a mobile armature (16) of a corresponding actuation electromagnet (17) having a ferromagnetic core (18) provided with polar extensions. A separation element (30) is interposed between the mobile armatures (16) and the corresponding polar extensions. The separation element (30) is made of a metal material and comprises elements (33, 34) able to reduce the effects of the eddy currents which are generated by the energizing of every electromagnet (17).
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: May 13, 2003
    Assignee: Compuprint SpA
    Inventors: Andrea Garramone, Ettore Quattrini, Roberto Boggio
  • Needle printing head
    Publication number: 20010048835
    Abstract: A needle printing head comprising a support (11) able to axially guide a plurality of printing needles (15), each of which has one end attached to a mobile armature (16) of a corresponding actuation electromagnet (17) having a ferromagnetic core (18) provided with polar extensions. A separation element (30) is interposed between the mobile armatures (16) and the corresponding polar extensions. The separation element (30) is made of a metal material and comprises elements (33, 34) able to reduce the effects of the eddy currents which are generated by the energizing of every electromagnet (17).
    Type: Application
    Filed: May 30, 2001
    Publication date: December 6, 2001
    Inventors: Andrea Garramone, Ettore Quattrini, Roberto Boggio
  • Dot matrix printing head with variable armature abutments
    Patent number: 5385415
    Abstract: A dot matrix printing head and related printing apparatus, the print head comprising a plurality of printing electromagnets, each having a magnetic core, an energization winding, a movable armature for actuation of a printing element and a first abutment element defining a first rest position of the armatures, where electrically energizeable means are provided for controlling the position of a second abutment element which defines a second rest position of the armatures, so as to change the air gap width between each armature and the related magnetic core and the stroke of the related printing element, depending on requirement of printing on single copy sheets or multiple copy sheets, and where, in addition to gap adjustment, the duration of the energization time interval of the printing electromagnets, their energization frequency and the advancement speed of the print head relative to a printing medium are modified to achieve the best performances, both when printing on single copy sheet and on multiple cop
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: January 31, 1995
    Assignee: Bull HN Information Systems Italia S.p.A.
    Inventor: Ettore Quattrini