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US 6,546,871 B1Granted
Method for adjusting a register
AssigneeKoenig & Bauer Aktiengesellschaft
InventorErhard Herbert Glöckner
Life of this patent
Estimating the term…
Abstract
A method for adjusting a color register in a web-fed rotary printing press is accomplished by measuring an actual web tension and comparing it to a reference value for the web tension. If the actual web tension exceeds the reference value by more than a permissible tolerance either the number of revolutions of one of two print positions or the cylinder positions of one of the print positions is changed.
Claims5
A method for adjusting a register in a web-fed rotary printing press including:
- determining an actual value of a web tension in a web being printed in a web-fed rotary printing press before and after a web roll change;
- providing a reference value of a web tension in a web being printed in a web-fed rotary printing press;
- providing a permissible tolerance between said actual value and said reference value;
- comparing said actual value to said reference value;
- determining a deviation between said actual value and said reference value;
- and
- changing the register only before and after a web roll change by adjusting at least one of a number of revolutions and an angular position of at least one cylinder of a first print position relative to at least one cylinder of a second print position when said deviation is greater than said permissible tolerance.
4 more elements
Dependencies are inferred from the claim text.