Continuous web printing press with page cutting control apparatus and method
OwnerIra B. Goldberg, Edward Hudyma +2inventors
InventorsIra B. Goldberg, Edward Hudyma, Ragy A. Isaac, Kenneth W. Dabisch
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Abstract
A printing press with a page cutting control apparatus (11) for controlling cut-off registration in a rotary printing press (10) includes markers (30, 32, 51, 53) for printing reference marks (36) on webs (20, 23) with magnetizable ink having magnetic particles therein, magnetizers (62, 64, 65, 67) for magnetizing the reference marks, sensors (121-124) for magnetically detecting the reference marks, and a controller (140) for changing the web length in response to the detecting.
Claims31
In a continuous web printing press having a plurality of webs, a method of controlling the relative location of page cuts of all the plurality of webs to form multiple pages having substantially equal page lengths, comprising the steps of:
- placing reference marks on all of the plurality of webs;
- detecting the reference marks independently of visible light from the reference marks;
- and
- controlling the relative position of page cuts of all of the plurality of webs in accordance with the light independent detecting of the reference marks on at least one of the plurality of webs through another one of the plurality of webs.
In a continuous web printing press having a plurality of webs and having a cutting mechanism for making page cuts on the webs to form multiple pages having substantially equal page lengths, the improvement being a page cutting control apparatus, comprising:
- means for placing reference marks on all of the plurality of webs;
- means for detecting the reference marks independently of visible light from the reference marks;
- and
- means for controlling the relative position of the page cuts of all of the plurality of webs in response to the light independent detecting means detecting a reference mark on at least one of the plurality of webs through another one of the plurality of webs.
Dependencies are inferred from the claim text.