G - Physics – 01 – N
Patent
G - Physics
01
N
101/101, 73/58
G01N 21/17 (2006.01) B41F 33/00 (2006.01)
Patent
CA 1221852
- Abstract - The device for sectional monitoring by technical measu- ring instruments the control of humidifying agents within the inking system of an offset printing machine comprises a measuring drum (3) adjusted to a printing paste feeding roller (1) and comprising a partly oleophile, partly hydro- phile surface. In order to precisely establish the partial variations of the humidifying agent contents of the prin- ting paste across the full width of the machine, at least the oleophile surface areas are designed as screens (4) which guarantees both in longitudinal and in circumferen- tial direction of the measuring drum (3) A uniform zonal coverage of an optional zonal coverage degree. During the printing process, the oleophile screen (4) takes up prin- ting paste, whereas the hydrophile surface areas (5) re- main free from printing paste. An opto-electronical measu- ring device (6) is used to continuously measure the zonal coverage and/or its variation on the oleophile screen (4), the measuring results being either shown on a subsequent indicating device (9) or directly used for an immediate approach to zonal positioning elements of a humidifying system. For the purpose of increasing the measuring sen- sitivity, the oleophile screen (4) can either present, in circumferential direction of the measuring drum (3), a uniformely graded surface coverage with at least two different surface coverage degress or be preferently de- signed as a continuously proceeding screen wedge (10), providing for a continuous decrease from 100% to 0% of the surface coverage (see figure 1).
456050
Jeschke Willi
Pyliotis Dimitrios
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
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