Method for controlling a rotary press and rotary press
AssigneeGoss International Montataire SA
InventorsPascal Ollivier, Jean-Valere Holvoet, Francois Vidaillac
Life of this patent
Estimating the term…
Abstract
A method is provided for a rotary press of the type including cylinders for printing and feeding a web to be printed, and at least one cylinder for feeding said web located downstream of the printing cylinders in the direction of movement of the web. According to this method, in normal operation, said printing and feed cylinders and the or each downstream feed cylinder are driven in a synchronized manner and, in the event of the web breaking, a step for the differential braking of said printing and feed cylinders and of the or each downstream feed cylinder is implemented.
Claims13
1 to 12. (canceled)
A method for controlling a rotary press for printing a web of material, the press including:
- printing units each having at least one printing and feed cylinder for printing and feeding the web in a direction of movement;
- and
- at least one downstream feed cylinder for feeding the web located downstream of the printing units in the direction of movement of the web;
- the method comprising the steps of:
- driving, in normal operation, the printing and feed cylinders and the at least one downstream feed cylinder in a synchronized manner;
- and,
- performing, in the event of the web breaking, differential braking of the printing and feed cylinders and of the at least one downstream feed cylinder.
The method as recited in 13 wherein the printing and feed cylinders and the at least one downstream feed cylinder are braked in a synchronized manner during the differential braking step.
A rotary press comprising:
- a plurality of printing units each having at least one printing group, each printing group comprising a cylinder for printing and feeding a web to be printed, and a counter-pressure cylinder for pinching a web to be printed between the counter-pressure cylinder and the printing and feed cylinder;
- at least one downstream feed cylinder for feeding the web located downstream of the printing units in the direction of movement of the web;
- a motor for driving the printing and feed cylinders and the downstream feed cylinders;
- and
- a controller driving, in normal operation, the printing and feed cylinders and the at least one downstream feed cylinder in a synchronized manner, and, performing, in the event of the web breaking, differential braking of the printing and feed cylinders and of the at least one downstream feed cylinder.
Dependencies are inferred from the claim text.