Patents by Inventor Paolo Rivera

Paolo Rivera 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).

  • Patent number: 5523848
    Abstract: The printing device has, in addition to a line feeding device mounted upstream of the printing line to make the sheet advance incrementally, an extraction mechanism mounted downstream of the printing line in order to enable printing without smudging until the trailing edge of the sheet; the extraction mechanism including a couple of robber rollers and opposed pressure rollers having fine external teeth, which are selectively engaged, when the trailing edge of the sheet reaches a determined position, by means of cam driven levers.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: June 4, 1996
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventors: Pietro Musso, Paolo Rivera
  • Patent number: 4650993
    Abstract: An optical transducer for detecting the position of a rotary or translatory member comprises a light source, a photodetector group, and a shutter provided with a series of transparent elements spaced by opaque regions and interposed between the light source and the photodetector group. The photodetector group comprises an integrated circuit, on a surface of which is disposed a plurality of photovoltaic cells, each having an area which is a fraction of the area of each transparent element. The cells are divided into four groups to generate as many electrical signals which are out of phase relative to each other by 90.degree. and which are indicative of the position of the shutter with respect to the position of the photodetector group and the light source. The cells are disposed symmetrically with respect to a central radially extending optical axis, and in such a way that the barycenter of the areas of each of the four groups is included in the central optical axis.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: March 17, 1987
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventors: Marcello Boella, Paolo Rivera
  • Patent number: 4536650
    Abstract: An optical transducer for detecting the angular position of a rotary member with respect to a fixed structure, which comprises a shutter disc of transparent material, having two faces which are parallel to each other. The disc is provided with a plurality of radial shutter elements, spaced by elements which transmit the light. The shutter elements are formed by V-shaped elements provided on one face of the disc and capable of totally deflecting the light incident thereon.
    Type: Grant
    Filed: January 26, 1983
    Date of Patent: August 20, 1985
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventors: Ugo Carena, Paolo Rivera
  • Patent number: 4496835
    Abstract: An optical transducer for detecting the angular position of a rotary member with respect to a fixed structure comprises a disc 13 mounted rotatably within a casing. The disc is provided with a plurality of opaque radial regions 19 which are spaced by transparent regions 18 which transmit the light emitted by a light source mounted on the casing. The light is received by a photodetector element 25 comprising a support plate 28 on which is disposed a multiplicity of photovoltaic cells 26 each having an area which is fraction of the area of each transparent region of the disc. The cells are subdivided into the groups A, B and C with different functions and phase positions and are distributed diffusely over the area encountered by the beam of light from the light source. The cells of each group are connected together in parallel to generate three electrical signals, one of which provides pilot control for the feed to the light source to stabilize the signals of the other two groups of photoelectric cells.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: January 29, 1985
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventors: Marcello Boella, Paolo Rivera