Abstract: A digital printing machine includes a printing material transport device, an inkjet print head having a nozzle plate, and a capping element. The inkjet print head is adjustable into a first print head position relative to the capping element and the capping element is adjustable into a capping position relative to the inkjet print head. The capping element temporarily covers the nozzle plate when the inkjet print head is in the first print head position and the capping element is simultaneously in the capping position.

Abstract: A digital printing machine includes a printing bar for inkjet printing. The printing bar is mounted to be movable into a working position and into a retracted position. An adjustable roll and a spring-mounted roll form a first assembly and are disposed opposite one another. A rail forms a second assembly and is located between the adjustable roll and the spring-mounted roll when the printing bar is in the working position and is not located between the adjustable roll and the spring-mounted roll when the printing bar is in the retracted position. One of the two assemblies is disposed on the printing bar and the other of the two assemblies is separate from the printing bar.

Abstract: A method for avoiding collisions in a digital inkjet printing machine, a method and a device for actuator-based lifting movement of inkjet heads. A sensor/camera monitors the sheets as they travel towards the inkjet heads. In order to avoid collisions, the inkjet heads are raised and lowered again individually and in an oscillation-optimized manner when a defective sheet is detected. The machine does not need to be stopped in the event of defective sheets. Advantageously, rejects can thus be reduced and the performance of the machine can be exploited better.

Abstract: A digital printing machine includes a printing bar for inkjet printing. The printing bar is mounted to be movable into a working position and into a retracted position. An adjustable roll and a spring-mounted roll form a first assembly and are disposed opposite one another. A rail forms a second assembly and is located between the adjustable roll and the spring-mounted roll when the printing bar is in the working position and is not located between the adjustable roll and the spring-mounted roll when the printing bar is in the retracted position. One of the two assemblies is disposed on the printing bar and the other of the two assemblies is separate from the printing bar.

Abstract: A digital printing machine includes a printing material transport device, an inkjet print head having a nozzle plate, and a capping element. The inkjet print head is adjustable into a first print head position relative to the capping element and the capping element is adjustable into a capping position relative to the inkjet print head. The capping element temporarily covers the nozzle plate when the inkjet print head is in the first print head position and the capping element is simultaneously in the capping position.

Abstract: A method for avoiding collisions in a digital inkjet printing machine, a method and a device for actuator-based lifting movement of inkjet heads. A sensor/camera monitors the sheets as they travel towards the inkjet heads. In order to avoid collisions, the inkjet heads are raised and lowered again individually and in an oscillation-optimized manner when a defective sheet is detected. The machine does not need to be stopped in the event of defective sheets. Advantageously, rejects can thus be reduced and the performance of the machine can be exploited better.

Abstract: A method and a device for combining an auxiliary stack and a main stack include a rake carrying the auxiliary stack and being abruptly movable out of a stack area to prevent sheets that contact the rake from being entrained and to preserve the structure of the stack. A sheet-fed printing press or sheet punching machine having the device is also provided.

Abstract: A device for combining an auxiliary stack with a main stack includes an auxiliary stack carrier which holds the auxiliary stack and which can be moved out of the stack area for combining the stacks. A holding device firmly holds a lower sheet of the auxiliary stack and an upper sheet of the main stack as the auxiliary stack carrier is moved out of the stack area, in order to maintain a good stack structure. A sheet-fed printing press or sheet punching machine having the device is also provided.

Abstract: A device for combining an auxiliary stack with a main stack includes an auxiliary stack carrier which holds the auxiliary stack and which can be moved out of the stack area for combining the stacks. A holding device firmly holds a lower sheet of the auxiliary stack and an upper sheet of the main stack as the auxiliary stack carrier is moved out of the stack area, in order to maintain a good stack structure. A sheet-fed printing press or sheet punching machine having the device is also provided.

Abstract: A method and a device for combining an auxiliary stack and a main stack include a rake carrying the auxiliary stack and being abruptly movable out of a stack area to prevent sheets that contact the rake from being entrained and to preserve the structure of the stack. A sheet-fed printing press or sheet punching machine having the device is also provided.

Abstract: A device and a method for raising and positioning an object, for example a sheet from a sheet stack, uses a whirlwind to generate a negative pressure for generating a retaining force and uses interference air for releasing the retaining force.

Abstract: A device and a method for raising and positioning an object, for example a sheet from a sheet stack, uses a whirlwind to generate a negative pressure for generating a retaining force and uses interference air for releasing the retaining force.