Method for driving a satellite offset press and satellite offset press
AssigneeHeidelberger Druckmaschinen AG
InventorBernd Herrmann
Life of this patent
Estimating the term…
Abstract
A method for driving a satellite offset press, and a satellite offset press which, with little expenditure, permits multicolor printing in one pass. A satellite offset press, in which form cylinders and associated transfer cylinders are driven synchronously, while in each case segments located in the circumferential direction of the form cylinders and of the transfer cylinders and also of the transfer cylinders and of an impression cylinder interacting with the latter roll on one another in accurate register with a sheet held thereon, following each full revolution. The speed of the impression cylinder is reduced and increased again, so that the transfer cylinders lead by at least one segment length in the circumferential direction.
Claims8
A method for driving a satellite offset press, which comprises the steps of:
- driving form cylinders and associated transfer cylinders synchronously, while in each case segments located in a circumferential direction of the form cylinders and of the transfer cylinders and also of the transfer cylinders and of an impression cylinder interacting with the latter roll on one another in accurate register with a sheet held thereon;
- and
- following each full revolution, reducing and increasing again a speed of the impression cylinder, so that the transfer cylinders lead by at least one segment length in the circumferential direction.
A satellite offset press, comprising:
- at least two satellite printing units, said satellite printing units having transfer cylinders and form cylinders with inking units;
- an impression cylinder interacting with said at least two satellite printing units for printing sheets, said impression cylinder, said transfer cylinders and said form cylinders having equally long segments disposed in a circumferential direction;
- a device for leading the sheets to and from said impression cylinder;
- and
- at least one drive for driving said transfer cylinders and said form cylinders synchronously and for driving said impression cylinder, said driving of said impression cylinder being controlled independently of said driving of said transfer cylinders and of said form cylinders, it being possible for a speed of said impression cylinder to be varied during a revolution of said transfer cylinders.
Dependencies are inferred from the claim text.