An antistatic device for reducing electrostatic charges on moving material webs may include an active positive electrode assembly having a plurality of active individual positive electrodes electrically connected to a positive high voltage source. The device may include an active negative electrode assembly having a plurality of active negative electrodes electrically connected to a negative high voltage source. A sensor system may be included for detecting a polarity of a neutralizing current between the material web and the antistatic device during operation of the antistatic device, and a controller for controlling the high voltage sources. The controller may be coupled to the sensor system and may be at least one of programmed and configured to one of active or leave activated the high voltage source required in each case and one of deactivate and leave deactivated the high voltage source not required in each case in response to the detected polarity of the neutralizing current.

An oscillating roller system for a beverage can decorator is driven back and forth by a cam follower. A cam body having a cam is mounted to a frame of the inker system. Three oscillating cam roller assemblies are positioned about the cam body. Rotation of the cam oscillates the cam followers for each one of the oscillating rollers. Bearings of the oscillating roller assemblies includes an inlet gallery and outlet gallery for a closed loop lubrication system. The rollers are water cooled.

A printing machine for printing on a web includes a first roller and a second roller between which the web forms a loop. A trough for pneumatically guiding the loop equidistantly to the major part of the length of curvature of the trough is provided between the first roller and the second roller.

An apparatus, a printing press and method for correcting the printing position of a printing unit of a printing press that has at least one sensor unit, where the method incudes the steps of detecting an actual position of at least one print mark via the sensor unit, where the print mark is printed onto a printing material via the printing unit, determining of a deviation of the detected actual position from a setpoint position, determining at least one difference value that characterizes the deviation, determining a buffer value from a number of basic values previously stored in a memory, determining a correction value by subtracting the buffer value from the difference value, storing the determined correction value in the memory as one of the basic values, and correcting the printing position based on the determined correction value.

A method is provided for controlling a web in a printing apparatus The printing apparatus includes a transport assembly for moving the web through a transport path along a printing unit for printing an image onto a print area of the web. The method includes feeding the web from a supply roll through the transport path to the transport assembly; and switching the printing apparatus to a ready-to-print mode, wherein the printing unit does not print an image on the web and the web is maintained ready to be printed on. In a printing mode after the ready-to print mode, the following steps are performed: moving the web through the transport path in a transport direction along the printing unit by the transport assembly; and printing the image onto the print area of the web by the printing unit. The image is printed by applying an image material, which solidifies on the web during the printing step. The ready-to-print mode includes the step of: operating the transport assembly to prevent a deformation of the print area of the web in the transport path, while maintaining the web in the ready-to-print mode. The web is maintained ready to print while preventing a deformation of the print area of the web in the transport path.

The invention relates to an apparatus and method for cutting, printing or embossing a continuous sheet of material. The apparatus comprises a tool element, at least two anvils, which are co-operable with the tool element, and a phase adjustment device. The tool element is configured to have a constant surface speed during operation of the apparatus. The apparatus is adapted to receive the continuous sheet at a constant speed into the apparatus, and being adapted to output the continuous sheet at a constant speed from the apparatus. The phase adjustment device is operable to adjust a speed of the continuous sheet within the apparatus in order to adjust a phase of alternate parts of the continuous sheet to be cut, printed or embossed by each anvil as it co-operates with the tool element.

A controller, upon a web roll being set on a web roll support shaft: drives a brake to apply a braking force of a first value to the web roll support shaft, the first value being a value at which the web roll does not rotate when a predetermined tension is applied to a web, and drives a conveyance motor to generate a drive force for the predetermined tension; drives the brake with the drive force generated to gradually reduce the braking force from the first value while determining whether rotation of a conveyance roller starts; and upon determining that the rotation of the conveyance roller starts, determines a second value of the braking force as an initial value of the braking force in conveyance of the web for printing, the second value being a value at which the rotation of the conveyance roller starts.

A controller, upon a web roll being set on a web roll support shaft: drives a brake to apply a braking force of a first value to the web roll support shaft, the first value being a value at which the web roll does not rotate when a predetermined tension is applied to a web, and drives a conveyance motor to generate a drive force for the predetermined tension; drives the brake with the drive force generated to gradually reduce the braking force from the first value while determining whether rotation of a conveyance roller starts; and upon determining that the rotation of the conveyance roller starts, determines a second value of the braking force as an initial value of the braking force in conveyance of the web for printing, the second value being a value at which the rotation of the conveyance roller starts.

A machine for digital printing on tape, which comprises a frame that supports elements of entraining at least one tape along an advancement path and is provided with at least one printing assembly, which comprises at least one ink-jet printing head; downstream of the printing assembly, along the advancement direction of the tape, there is at least one assembly for drying the inks applied to the tape; the drying assembly comprises a temperature-adjustable drum for supporting and entraining the tape, adhesion elements adapted to allow the retention in adhesion of the tape on the outer lateral surface of the drum, and hot air emitter elements which face at least one portion of the outer lateral surface of the drum.

A machine for digital printing on tape, which comprises a frame that supports elements of entraining at least one tape along an advancement path and is provided with at least one printing assembly, which comprises at least one ink-jet printing head; downstream of the printing assembly, along the advancement direction of the tape, there is at least one assembly for drying the inks applied to the tape; the drying assembly comprises a temperature-adjustable drum for supporting and entraining the tape, adhesion elements adapted to allow the retention in adhesion of the tape on the outer lateral surface of the drum, and hot air emitter elements which face at least one portion of the outer lateral surface of the drum.