Patents by Inventor Masami Tsunasawa

Masami Tsunasawa 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).

  • Method of making rotary type wheels
    Patent number: 4228577
    Abstract: Resilient tongues project from a central hub and carry two or more type members. The hub is rotated to a position in which the tongue carrying the desired type member is in a printing position facing a paper supporting platen. The hub is then shifted along the axis of the selected tongue so that the required type member is in a printing position. A drive motor for rotating the hub is connected to the hub by a universal joint to compensate for the shifting of the hub. The universal joint comprises a biased presser member to eliminate lost motion in the rotational direction. A stopper member is provided so that the bending characteristics of the selected tongue are the same no matter which type member is selected. A hammer drives the type member against the paper to print. The resilient tongues are formed of a thermoplastic resin mixed with glass or carbon fibers and the type members may be formed separately from the tongues, fixed thereto and plated with metal.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: October 21, 1980
    Assignee: Ricoh Company, Ltd.
    Inventors: Takami Suzuki, Nobuo Iwata, Masami Tsunasawa
  • Serial printing apparatus
    Patent number: 4126400
    Abstract: Resilient tongues project from a central hub and carry two or more type members. The hub is rotated to a position in which the tongue carrying the desired type member is in a printing position facing a paper supporting platen. The hub is then shifted along the axis of the selected tongue so that the required type member is in a printing position. A drive motor for rotating the hub is connected to the hub by a universal joint to compensate for the shifting of the hub. The universal joint comprises a biased presser member to eliminate lost motion in the rotational direction. A stopper member is provided so that the bending characteristics of the selected tongue are the same no matter which type member is selected. A hammer drives the type member against the paper to print. The resilient tongues are formed of a thermoplastic resin mixed with glass or carbon fibers and the type members may be formed separately from the tongues, fixed thereto and plated with metal.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: November 21, 1978
    Assignee: Ricoh Company, Ltd.
    Inventors: Takami Suzuki, Nobuo Iwata, Masami Tsunasawa