A machine arrangement sequentially processes sheet-like substrates with multiple different processing stations each having a substrate-guiding unit and a substrate-processing unit. At least one of the processing stations has, as a substrate-processing unit, at least one non-impact printing device which prints on the substrate. The processing station with the at least one non-impact printing device has a printing cylinder. Each non-impact printing device is arranged at the circumference of the printing cylinder. The printing cylinder is triple-sized or quadruple-sized. A double-sized or a triple-sized transfer drum, or a corresponding feed cylinder, is arranged directly upstream of this printing cylinder. Alternatively, a double-sized or a triple-sized transfer drum, or a corresponding transfer cylinder, is arranged directly downstream of this printing cylinder.

A machine arrangement sequentially processes sheet-like substrates with multiple different processing stations each having a substrate-guiding unit and a substrate-processing unit. At least one of the processing stations has, as a substrate-processing unit, at least one non-impact printing device which prints on the substrate. The processing station with the at least one non-impact printing device has a printing cylinder. Each non-impact printing device is arranged at the circumference of the printing cylinder. The printing cylinder is triple-sized or quadruple-sized. A double-sized or a triple-sized transfer drum, or a corresponding feed cylinder, is arranged directly upstream of this printing cylinder. Alternatively, a double-sized or a triple-sized transfer drum, or a corresponding transfer cylinder, is arranged directly downstream of this printing cylinder.

A printing apparatus includes a printing cylinder (14) that can hold sheets (4) and transfer them one by one continuously, first to fourth inkjet heads (41-44), and a feeder unit (2). The printing apparatus includes a speed reducer (72) that switches the speed of the feeder unit (2) between single-sided printing and double-sided printing. In single-sided printing, the feeder unit (2) is driven at a first supply speed at which the sheets (4) are supplied to the printing cylinder (14) one by one continuously, and the printing cylinder (14) is driven at a transfer speed at which the sheets (4) supplied from the feeder unit (2) one by one continuously are transferred. In double-sided printing, the printing cylinder (14) is driven at the transfer speed, and the feeder unit (2) is driven at a second supply speed that is the first supply speed. The printing apparatus that operates stably in both single-sided printing and double-sided printing can be provided.

The invention relates to a sheet-fed printing press having a feeder, a delivery, and at least one sheet guiding cylinder, which is arranged between the feeder and the delivery, has a gripper system, and is assigned a digital printing system and a first sheet guiding system that removes sheets from the sheet guiding cylinder. The object of the invention is to devise a sheet-fed printing press that can be used in a more variable fashion, and with which a particularly wide spectrum of different products can be produced. According to the invention, the object is attained in that the first sheet guiding system (12) is configured for selectively transferring the sheets to a second sheet guiding system (8), which transfers the sheets to the sheet guiding cylinder (3), or for transferring said sheets to the delivery (11), wherein the second sheet guiding system (8) is configured as a perfecting system (8) and can be switched between an operating mode in which it feeds the sheets in a reversed position to the sheet guiding cylinder (3) and an operating mode in which it feeds the sheets in a non-reversed position to the sheet guiding cylinder.

A method for operating a printing machine having a processor and a device for detecting features of printing substrates includes storing print jobs with the printing substrates appropriate thereto in a database. Features of at least one printing substrate are detected by using the device. The detected features of the at least one printing substrate are compared by the processor with the printing substrates of the print jobs from the database. The processor selects at least one print job in which the printing substrates of the print jobs from the database correspond to the at least one detected printing substrate or attain a predefined similarity. The at least one print job selected by the processor is subsequently executed on the printing machine.

There are provided a liquid jetting apparatus and a method of coping with the floating of a medium that enable the originally required moving distance of a liquid jet head to be set in a case where the contact between the liquid jet head and a medium caused by the floating of the medium is to be avoided. The liquid jetting apparatus includes a first medium floating detection unit (140) that detects the floating of a medium, a first head raising/lowering unit (400) that moves a first liquid jet head, a first movement parameter setting unit (142) that sets a first movement parameter, a first head raising/lowering control unit (120) that controls the first head raising/lowering unit, a second head raising/lowering unit (400) that moves a second liquid jet head, a second movement parameter setting unit (142) that sets a second movement parameter separately from the first movement parameter, and a second head raising/lowering control unit (120) that controls the second head raising/lowering unit.

A printing apparatus includes a printing cylinder (14) that can hold sheets (4) and transfer them one by one continuously, first to fourth inkjet heads (41-44), and a feeder unit (2). The printing apparatus includes a speed reducer (72) that switches the speed of the feeder unit (2) between single-sided printing and double-sided printing. In single-sided printing, the feeder unit (2) is driven at a first supply speed at which the sheets (4) are supplied to the printing cylinder (14) one by one continuously, and the printing cylinder (14) is driven at a transfer speed at which the sheets (4) supplied from the feeder unit (2) one by one continuously are transferred. In double-sided printing, the printing cylinder (14) is driven at the transfer speed, and the feeder unit (2) is driven at a second supply speed that is the first supply speed. The printing apparatus that operates stably in both single-sided printing and double-sided printing can be provided.

A liquid discharge apparatus includes a rotator, a liquid discharger, a sheet-material position detector, a first signal output device, a second signal output device, and circuitry. The rotator carries a sheet material on a circumferential surface and conveys the sheet material. The liquid discharger discharges liquid onto the sheet material. The sheet-material position detector detects a position of the sheet material. The first signal output device outputs a first signal corresponding to a rotation amount of the rotator. The second signal output device outputs a second signal correlated with a movement amount of the sheet material on the circumferential surface of the rotator. The circuitry determines a discharge start timing of the liquid discharger from a detection result of the sheet-material position detector and the first signal, and generates a discharge timing of the liquid discharger from the second signal.

A sheet-fed printing press has a feeder, a deliverer and at least one sheet guiding cylinder which is arranged between the feeder and the deliverer. The sheet-fed printing press also is a gripper system and is assigned to a digital printing device. A first sheet guiding device receives sheets from the sheet guiding cylinder. The object of the sheet-fed printing press is to provide such a sheet-fed printing press which can be used in a relatively variable manner and by way of which, in particular, a relatively great spectrum of different products can be produced. This object is accomplished by virtue of the fact that the first sheet guiding device is configured for the selective transfer of the sheet to a second sheet guiding device, which transfers the sheets to the sheet guiding cylinder, or for the transfer to the deliverer. The second sheet guiding device is configured as a turner device and can switched over between an operating mode, in which it turns the sheets, and an operating mode, in which it feeds the sheets, in a non-turned state, to the sheet guiding cylinder.

A sheet conveying device includes a sheet conveyor, a guide, a rotary conveyor, a gripper, and an adjuster. The sheet conveyor is configured to convey a sheet. The guide is configured to guide the sheet conveyed by the sheet conveyor. The rotary conveyor is disposed downstream from the guide in a sheet conveyance direction. The gripper is mounted on the rotary conveyor, the gripper configured to grip a leading end of the sheet. The adjuster is configured to adjust a sheet entering range of the gripper to which the leading end of the sheet enters, along with conveyance of the sheet conveyor, in a direction intersecting a sheet surface.