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 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.

An image forming apparatus includes: a first supplying device configured to supply a first ink onto a recording medium to form a non-color print layer on the recording medium, the first ink comprising non-color particles; and a second supplying device configured to supply a second ink onto the recording medium having the non-color print layer formed thereon, to form a color print layer on the recording medium, the second ink including color pigment particles that are decolored when heated.

A printing apparatus includes a printing cylinder (17) that holds and transfers a sheet (4), a supply-side transfer cylinder (16 (sheet supply unit)) that supplies the sheet (4) to the printing cylinder (17) at a supply position (P1), and first to fourth inkjet heads (27-30). The printing apparatus includes a transfer mechanism (18) that receives the sheet (4) after printing at a receiving position (P2) and transfers the sheet (4) to one of a discharge route (44) and a reversing route (42). The reversing route (42) employs an arrangement that returns the reversed sheet (4) to the printing cylinder (17) at a return position (P3) located on the downstream side of the receiving position (P2) in the transfer direction of the sheet (4) and on the upstream side of the supply position (P1) in the transfer direction of the sheet (4). A cooling means (45) for cooling the transfer surface (24 (outer peripheral surface)) of the printing cylinder (17) is provided between the receiving position (P2) and the return position (P3). It is possible to provide the printing apparatus that suppresses an increase in the temperature of the transfer surface of the printing cylinder and always sets the temperature of the sheet at an appropriate temperature.

A digital printing press including a printing cylinder configured to transport a sheet, a driving device (41) configured to drive the printing cylinder, an encoder (44) configured to detect the phase of the printing cylinder, and first to fourth inkjet heads configured to print the sheet. The digital printing press includes a floating detector facing the printing cylinder and configured to detect an abnormality of the sheet, a display device, and a control device configured to control an operation of the driving device. The control device includes a function of stopping the driving device when the floating detector detects a floating portion. The control device includes a function of obtaining information specifiable a position of an abnormality occurrence portion based on the phase of the printing cylinder when the floating detector detects the floating portion and the phase of the printing cylinder when the driving device stops after floating detection and displaying the information on the display device. The digital printing press is capable of quickly specifying an abnormality occurrence portion detected during printing.

A rotary printing machine includes a printing cylinder, at least one clamping unit mounted on a printing surface of the printing cylinder, and a feeding control mechanism and an unloading control mechanism mounted to a lateral side of the printing cylinder for changing the clamping state of the clamping unit. When the clamping unit is moved to an unloading position, the unloading control mechanism can be operated to control the clamping unit to maintain a closed state, so that a workpiece can be brought by the printing cylinder to a feeding position again. Then, the feeding control mechanism can be operated to control the clamping unit at the feeding position to maintain a clamped state, so that printing can be repeated on the workpiece to form multiple layers of ink and create three-dimensional printed layers showing a specific visual effect.

A digital printing press including a printing cylinder configured to transport a sheet, a driving device (41) configured to drive the printing cylinder, an encoder (44) configured to detect the phase of the printing cylinder, and first to fourth inkjet nozzle heads (23-26). The digital printing press further includes a floating detector (22) and configured to detect an abnormality of the sheet, and a control device (28) configured to control an operation of the driving device (41). The control device (28) stops the driving device (41) when the floating detector (22) detects a floating portion. The control device (28) operates the driving device (41) based on the phase of the printing cylinder when the floating detector (22) detects the floating portion and when the driving device (41) stops after floating detection and moving the floating portion detected by the floating detector (22) to a predetermined confirmation position.

A sheet-fed printing press includes a printing cylinder and a high-precision sensor system for monitoring a sheet run in the area of the printing cylinder. At least one gage, which is mounted on the printing cylinder, can be detected by the sensor system. It is particularly advantageous if the sensor system is configured to be self-calibrating. A method for calibrating a sensor system and a method for aligning a sensor system are also provided.

A printing machine and method for using the same, for printing seamless fabrics provided in tube form, the printing machine comprising a drum on which a tube of the fabric is fitted; and a print head placed in proximity to said drum to print onto the tube fabric as it rotates on the drum. The print head moves axially on the drum to advance the printing.

A sheet conveyance apparatus (1) is provided in a sheet-fed offset printing press (2) including a printing unit (11). The printing unit (11) includes an impression cylinder (13) configured to hold and convey a sheet (4) and a printing device (14) configured to print the sheet (4) held by the impression cylinder (13). The sheet conveyance apparatus (1) includes a transfer cylinder (28) configured to hand over the sheet (4) to the impression cylinder (13) of the printing unit (11), and a pressing cylinder (29) configured to press the sheet (4) held by the transfer cylinder (28) against an outer surface of the transfer cylinder (28). The pressing cylinder (29) can press the sheet (4) against the transfer cylinder (28), and sufficiently stretch it.