Duplo Manufacturing Corp.

Duplo Seiko Corporation

Duplo Seiki Corporation

Ken Matsushita

Yoshihide Sugiyama

Tetsuo Onishi

Hiroki Ikeda

A winding apparatus for removing a used stencil in a printing machine having a stencil lift-off mechanism for lifting the leading end of the used stencil from a printing drum assembly and transporting mechanism for transporting the used stencil onto the winding apparatus, the winding apparatus comprises a generally cylindrical floating core for taking up the used stencil therearound, a support mechanism for rotatably supporting the core in contact directly therewith or through the used stencil when the core is at least partially wound with the used stencil, and a drive mechanism for rotating the core about the longitudinal axis thereof at a speed synchronized with the speed of transport of the used stencil.

Winding apparatus for removing used stencil

For use in a rotary printing machine comprising at least one rotary drum, an image carrier medium having an image area to be printed on an image supporting material, and a printing ink supply unit, an ink detecting device which comprises a plurality of sensor rolls rotatably supported in series on a single fixed shaft in frictional contact with the printing drum through a layer of printing ink interposed between said sensor rolls and said printing drum a first means for separately detecting rotational speed of each sensor rolls, a second means for detecting rotational speed of the printing drum, and a control means for comparing the rotational speed of each sensor roll, under the influence of the slip between the sensor rolls and the printing drum, and corresponding reference values respectively indicative of rotational speed of each sensor roll measured under such a condition that optimum quantity of printing ink is applied on the outer periphery of the printing drum, and accordingly controlling said ink supplying means so as to replenish the printing ink onto corresponding portions of the outer periphery of the printing drum which correspond to some sensor rolls the rotational speed of which exceeds the corresponding reference values.

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Wakayama, Japan

Ken Matsushita