Flying reel changer in a web-fed rotary printing machine
AssigneeHeidelberger Druckmaschinen AG
InventorAntoon Weijenborg
Life of this patent
Estimating the term…
Abstract
A flying reel changer includes first drive means for rotating the new paper reel at a minimum splice speed and second drive means for accelerating the old paper reel from either standstill or crawl speed to a speed which substantially corresponds to the minimum splice speed. The flying reel changer includes actuating means that, while the old paper reel is being accelerated from the first state, moves the dancer roll such that a substantially uniform tension is maintained in the paper web. The flying reel changer also includes joining means that joins the old paper web and the new paper web together while the old paper web and the new paper web are moving at the minimum splice speed.
Claims13
A flying reel changer for joining a beginning of a new paper web of a new paper reel to an outgoing old paper web in a web-fed rotary printing machine during standstill operation of the printing machine or during crawl operation of the printing machine, the flying reel changer comprising:
- a dancer roll over which the old paper web of the old paper reel is led;
- a first drive device for rotating the new paper reel at a minimum splice speed;
- a second drive device for accelerating the old paper reel from a first state to a speed that substantially corresponds to the minimum splice speed, the first state selected from the group consisting of a standstill and a speed corresponding to a crawl speed of the printing machine;
- an actuating device which, during acceleration of the old paper reel from the first state, moves said dancer roll such that a substantially uniform tension is maintained in the old paper web;
- and
- a joining device for joining the old paper web and the new paper web together while the old paper web and the new paper web are moving at the minimum splice speed.
A method of joining the beginning of a new paper web of a new paper reel to an outgoing old paper web of an old paper reel in a web-fed rotary printing machine, the method which comprises:
- leading the old paper web over a dancer roll in a flying reel changer of the web-fed rotary printing machine;
- rotating the new paper reel at a minimum splice speed;
- accelerating the old paper reel from a first state to a speed that substantially corresponds to the minimum splice speed;
- selecting the first state from the group consisting of a standstill and a speed corresponding to a crawl speed of the printing machine;
- while performing the accelerating step, simultaneously moving the dancer roll such that a substantially uniform tension is maintained in the old paper web;
- joining the old paper web and the new paper web together while the old paper web and the new paper web are moving at the minimum splice speed;
- and
- performing the joining step while the printing machine is in an operating condition selected from the group consisting of a standstill condition and a crawl condition.
Dependencies are inferred from the claim text.