An air fan assembly includes a suction box including a wall having an open area distributed across the wall. The suction box is configured to contain an underpressure on an inner side of the wall, so as to cause a cut sheet to adhere to a perforated transport belt. An impingement unit is configured to expel air supplied thereto towards the perforated transport belt. An air fan is arranged to create and maintain the underpressure in the suction box and to supply the air to be expelled by the impingement unit via an air outlet of the suction box. A first valve is arranged upstream of the air fan for conditionally admitting an additional air flow into the suction box. An inkjet printer and a method of operating the air fan assembly include the air fan assembly.

A liquid discharge apparatus includes a heater configured to heat a medium, a detector configured to detect a temperature of the heater, a conveyor configured to convey the medium during a printing operation, and circuitry configured to control the heater to heat the medium with a first output during a preheating operation before the printing operation, control the heater to heat the medium with a second output that is equal to or higher than the first output when the temperature of the heater reaches a predetermined threshold value to complete the preheating operation, and control the conveyor to start conveying the medium to start the printing operation.

The invention relates to a method and an assembly for producing a flat printed packaging material, having the steps of:providing a quasi-endless web of the packaging material on a first web roller orproviding a sheet of the flat packaging material on a first sheet stack,unwinding or receiving and transporting the packaging material by means of at least one printing station for printing a surface of the packaging material,subsequently transporting the packaging material through at least one drying station in order to dry the printing on the packaging material, andwinding the printed and dried packaging material onto a second web roller ordepositing the printed and dried packaging material onto a second sheet stack, wherein the drying process in the drying station comprises an irradiation process using electromagnetic radiation with a radiation density maximum in the near-infrared range and with a high power density, in particular between 100 and 800 kW/m2, and the packaging material is transported at least through the drying station on a thermally conductive carrier with an adjustable temperature.

A circuit includes a pulse generator to generate an output pulse in response to a signal representing rotation of a fan. A timing relationship between output pulses represents speed of the fan. A filter circuit converts the output pulse to a direct current (DC) voltage signal proportional to the speed of the fan. A monitor circuit monitors the DC voltage signal with respect to a predetermined threshold and generates a control signal that disables a printer dryer if the DC signal does not satisfy the predetermined threshold.

A printing apparatus includes a conveyance unit configured to convey a sheet along a conveyance path, a printing unit configured to print an image by discharging ink to the sheet conveyed by the conveyance unit, a first heating unit configured to, in a heating section on the conveyance path, heat the sheet on which the image has been printed by the printing unit, and a control unit configured to control the first heating unit so that the heating section is changed in accordance with a print condition.

A printing apparatus includes a conveyance unit configured to convey a sheet, a printing unit configured to print an image by discharging ink to the sheet conveyed by the conveyance unit, a heating unit configured to heat the sheet conveyed by the conveyance unit and to which the image has been printed by the printing unit, and a control unit configured to, in a case of double-side printing in which after printing an image to a first side of the sheet, an image is printed to a second side of the sheet, based on an amount of ink discharged for the first side and an amount of ink discharged for the second side, control heating by the heating unit with respect to the second side.

A method and system is provided for reducing condensation within an enclosed print arch of a printing press. The system includes at least one dehumidifier operable to create a dehumidified air flow directed into the print arch to reduce the humidity level within the print arch. The dehumidified air flow is selectively provided to a location at an infeed end of the print arch such that the movement of the print stock aids in moving the dehumidified air flow. The system further includes at least one exhaust fan that is operable to withdraw an exhaust air flow from within the enclosed print arch. The exhaust air flow can be vented to atmosphere or recirculated to the dehumidifier. A controller is used to control the operation of the dehumidifier and the exhaust fan based on signals from a temperature sensor and a humidity sensor each mounted within the enclosed print arch.

A printing apparatus includes a conveyance unit configured to convey a print medium, a printhead for printing an image by discharging ink to the conveyed print medium, a heating unit provided on a downstream side of the printhead with respect to a conveyance direction of the print medium and configured to heat the print medium, and a ventilation unit provided on a downstream side of the heating unit with respect to the conveyance direction and configured to ventilate air in a peripheral space of a conveyance path of the print medium. The printing apparatus controls to delay a start of printing by the printhead so that the print medium dried by the heating unit passes through the conveyance path in a state in which a humidity in the space becomes lower than a predetermined value due to the ventilation.

A liquid ejecting system includes an environmental information acquiring unit that acquires, as environmental information at least one of a temperature and a humidity, an ejecting unit that ejects a liquid onto a medium, a drying unit that dries the medium onto which the liquid is ejected by the ejecting unit, a control unit that controls the ejecting unit and the drying unit, and a storage unit that stores setting information. The control unit acquires drying information corresponding to medium type information and ejection amount information acquired as a liquid ejection condition and the environmental information acquired by the environmental information acquiring unit, based on the setting information stored in the storage unit, and performs drying control that controls the drying unit, based on the acquired drying information.

A compact ink drying apparatus is capable of drying ink ejected to a resin substrate. The ink drying apparatus has a hot air dryer, a hot air supplying part, and an exhausting part. The hot air dryer has a drying furnace, a substrate conveying path formed as a spirally shaped path in the drying furnace, and substrate drying ducts blowing hot air to a surface of a resin substrate on which ink is ejected conveyed along the substrate conveying path to heat ink and exhausting water vapor generated by heating of ink. The hot air supplying part is outside the drying furnace and supplies hot air into the substrate drying ducts, and the exhausting part is outside the drying furnace and exhausts air in the drying furnace through the substrate drying ducts.