Coded printing element and apparatus for use thereof


The printing mechanism comprises a printing element having a number of types and a coded region (26) in order to identify the design and the orientation of the printing element. A sensor scans the coding, and the output of the sensor is used to control the spacing between the characters and the force of the hammer with which the hammer strikes against the types. The printing element is constructed as a daisywheel, the individual types being held at the end of a multiplicity of radially extending spokes, thus resulting in a substantially circular arrangement. The coded region (26), which identifies the printing element (10) and its alignment, is arranged with spacing from the circular type arrangement in a substantially curved manner which lies concentrically to the circular arrangement of the types. In the printing mechanism comprising such a printing element, both the spacing between the individual characters and the striking force of the hammer are adjusted automatically in accordance with the printing element used in each case. <IMAGE>




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Cited By (11)

    Publication numberPublication dateAssigneeTitle
    EP-0200439-A2November 05, 1986Ing. C. Olivetti & C., S.p.A.Drehbarer Typenträger und Auswahlvorrichtung für eine Druckeinheit in Schreibmaschinen
    EP-0200439-B1June 19, 1991Ing. C. Olivetti & C., S.p.A.Drehbarer Typenträger und Auswahlvorrichtung für eine Druckeinheit in Schreibmaschinen
    GB-2127749-AApril 18, 1984Jeffrey P SteinDaisy wheel printer
    GB-2239116-AJune 19, 1991Brother Ind LtdPrinting apparatus
    US-4541746-ASeptember 17, 1985International Business Machines CorporationInitializing apparatus for daisy wheel printer
    US-4600324-AJuly 15, 1986Nec CorporationPrint thimble recognizing system for a serial printer
    US-4687356-AAugust 18, 1987Sharp Kabushiki KaishaElectronic printer with interleaved storage of print wheel position, hammer intensity, and carriage position data in read only memory
    US-4776713-AOctober 11, 1988Tokyo Electric Co., Ltd.Home position detecting apparatus for a print wheel
    US-4803500-AFebruary 07, 1989Siemens AktiengesellschaftInk printer means comprising interchangeable ink heads
    US-4846593-AJuly 11, 1989Canon Kabushiki KaishaPrinting apparatus system with a plurality of interchangeable type units
    US-5299872-AApril 05, 1994Brother Kogyo Kabushiki KaishaPrinting machine with single line type face