Abstract: A method is provided for a rotary press of the type including at least one cylinder for printing and feeding a web to be printed, and a device for driving in rotation the or each printing and feed cylinder. In normal operation, the at least one cylinder is driven by applying thereto a positive drive torque and a positive drive power, and, in the event of the web breaking, the at least one cylinder is braked by the associated drive device. According to one embodiment of the invention, in an emergency shutdown step, the torque or the power applied to the at least one printing and feed cylinder by the associated drive device is limited in such a manner as not to exceed a predetermined torque threshold or power threshold.

Abstract: The sheet transporting device of the invention includes: a transferring device (64) adapted to transfer a sheet (30), a conveying device (66; 66A) for conveying a sheet transferred from the transferring device (64) onto the conveying device, and a controlling means (76) adapted to control the speed of the conveying device (66; 66A) and defining a transfer cycle (CT). The controlling means (76) is adapted to slow down the conveying device (66) when a sheet is conveyed by the related conveying device and to accelerate the conveying device when no sheet is present on said conveying device. The invention can be used for the cutting devices of rotary printing machines.

Abstract: A device for controlling a rotary press is provided. The device includes a main evaluation unit which is provided with a main signal inlet, at least a first main signal outlet and a first main transformation device. The device further includes a master generator which is capable of generating a master signal which represents a reference value of the rotary press, and a first interface which is capable of generating a first periodic signal in accordance with the master signal and transmitting this first periodic signal to the main signal inlet.

Abstract: The sheet transporting device of the invention includes: a transferring device (64) adapted to transfer a sheet (30), a conveying device (66; 66A) for conveying a sheet transferred from the transferring device (64) onto the conveying device, and a controlling means (76) adapted to control the speed of the conveying device (66; 66A) and defining a transfer cycle (CT). The controlling means (76) is adapted to slow down the conveying device (66) when a sheet is conveyed by the related conveying device and to accelerate the conveying device when no sheet is present on said conveying device. The invention can be used for the cutting devices of rotary printing machines.

Abstract: A device for controlling a rotary press includes a main evaluation unit which is provided with a main signal inlet, at least a first main signal outlet and a first main transformation device. The device further includes a master generator which is capable of generating a master signal which represents a reference value of the rotary press, and a first interface which is capable of generating a first periodic signal in accordance with the master signal and transmitting this first periodic signal to the main signal inlet.

Abstract: An offset printing press is provided, including at least one unit for printing a web of paper, a device for transversely cutting the web of paper arranged downstream of the printing unit, and at least one system for controlling the printing unit. The control system is suitable for controlling, when the web of paper is moving, the implementation of steps involving: a) moving the printing unit into a throw-off configuration, the web of paper moving in the space delimited between the blanket cylinders, b) slowing down or accelerating the plate cylinder in order to modify the adjustment of the cutting register between the printing unit and the cutting device, c) moving the printing unit into a throw-on configuration.

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.

Abstract: A method is provided for a rotary press of the type including at least one cylinder for printing and feeding a web to be printed, and a device for driving in rotation the or each printing and feed cylinder. In normal operation, the at least one cylinder is driven by applying thereto a positive drive torque and a positive drive power, and, in the event of the web breaking, the at least one cylinder is braked by the associated drive device. According to one embodiment of the invention, in an emergency shutdown step, the torque or the power applied to the at least one printing and feed cylinder by the associated drive device is limited in such a manner as not to exceed a predetermined torque threshold or power threshold.