Printing-speed-responsive jaw spacing adjustment system for a jaw cylinder at the folding station of a web-fed printing press
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 4, 2004
Grant Date -
Dec 18, 2003
app pub date -
Mar 4, 2003
filing date -
Jun 14, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A printed paper web or any required number of such web in superposition are cut into sections at the folding station of a rotary printing press. Each web section has its midpart subsequently pushed into one of the jaw cavities in a jaw cylinder, therein to be engaged and folded by a fixed and a movable jaw. Both jaws are mounted to separate, independently movable parts of the jaw cylinder, to which is coupled a jaw spacing adjustment mechanism for moving the jaws toward and away from each other in order to vary the spacing therebetween in any operating phase of the movable jaw relative to the fixed jaw. In order to adjust the jaw spacing to the running speed of the press, as well as to the number of webs being processed jointly, a jaw spacing adjustment circuit is provided which puts out a signal indicative of a desired jaw spacing suiting both the press speed and the web thickness, for delivery to a stepper motor driving the jaw spacing adjustment mechanism.
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