Printing – Stenciling – Stencil-web machines
Patent
1985-01-29
1986-01-14
Fisher, J. Reed
Printing
Stenciling
Stencil-web machines
101363, B41F 1540, B41F 3102
Patent
active
045639477
ABSTRACT:
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.
REFERENCES:
patent: 3442121 (1969-05-01), Wirz
patent: 3730089 (1973-05-01), McCutcheon
patent: 3762324 (1973-10-01), Ivary
patent: 4312270 (1982-01-01), Gates
patent: 4446791 (1984-05-01), Stevens et al.
Ikeda Hiroki
Matsushita Ken
Sugiyama Yoshihide
Duplo Manufacturing Corporation
Duplo Seiki Corporation
Fisher J. Reed
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