Provided is an inkjet printing apparatus, an inkjet printing method, and a storage medium capable of causing less density unevenness. To this end, in a case where an expected pause time is larger than a predetermined threshold T (s), a platen air blowing unit blows air to the surface of a printing medium on a platen at a wind speed lower than that during printing.

A dryer for drying a drying object includes a hot air generator to generate hot air to be blown onto the drying object, a contact heater to contact and heat the drying object, and a controller to control a heating temperature of the contact heater and a temperature of the hot air. The controller controls the heating temperature of the contact heater to be above a first predetermined temperature from a start of generation of the hot air by the hot air generator until the temperature of the hot air reaches a second predetermined temperature.

Examples herein provide a method. The method includes preconditioning a printing apparatus, including: increasing a temperature of an inkjet printhead in a print zone in the printing apparatus to a first temperature higher than or equal to about a steady state printhead temperature; and increasing a temperature of the print zone such that a portion of a print medium disposed over a portion of a platen in the print zone is at a second temperature higher than or equal to about a steady state print zone temperature. The method further includes disposing, using the printhead, an ink at the steady state printhead temperature onto the portion of the print medium to form an image thereon.

Systems and methods for adjustable interlacing of drying rollers in a print system. One system is an apparatus that includes first rollers that conduct heat from a heat source, and dry a web of print media as the web travels over a front side of the first rollers in a first direction. A last roller of the first rollers turns the web in a second direction. The apparatus also includes second rollers disposed a distance above the first rollers and that transport the web in the second direction. The apparatus further includes a movement mechanism that reduces the distance between the second rollers and the first rollers to cause the second rollers to occupy spaces between the first rollers so that the web traveling in the second direction contacts a back side of the first rollers to further dry the web.

A recording method includes applying an ink composition onto a recording medium, primarily drying the recording medium during the application of the ink composition, transporting the recording medium applied the ink composition to a secondary drying device, and secondarily drying the recording medium with the secondary drying device. The variation in surface temperature of the recording medium from the primary drying temperature (T1) to the lowest temperature and the variation in surface temperature of the recording medium from T1 to the highest temperature, in the period from completion of the application of the ink composition to completion of the secondary drying are 40% or more and 370% or less, respectively, relative to T1. The surface temperature of the recording medium is increased to the secondary drying temperature at an average rate of 7 C./s or less after the completion of the application of the ink composition.

A heating device includes a belt, a heater, a first temperature sensor, a second temperature sensor, a circuitry, and a heat-source controller. The heater includes a heat source to heat the belt. The first temperature sensor is disposed at a position facing the heater via the belt and separated from the belt to detect a first temperature of the belt. The second temperature sensor is disposed at a position directly facing the heater and separated from the heater, to detect a second temperature of the heater. The circuitry corrects the first temperature detected by the first temperature sensor based on the second temperature detected by the second temperature sensor. The heat-source controller controls the heat source based on the first temperature corrected by the circuitry.

A printer includes an ink head, a first heater, a second heater, and a controller. The ink head includes first and second ink heads arrayed along a main scanning direction. The first heater is upstream of the platen in a sub-scanning direction, and heats the recording medium. The second heater is below the platen, and heats the recording medium placed on the platen. The controller includes a heater controller that controls the first and second heaters so that the surface temperature of a first region in which a first ink ejected from a first upstream nozzle array lands becomes higher than the surface temperature of a second region in which a second ink ejected from the second downstream nozzle array lands.

This disclosure is directed to more effectively prevent blocking. An inkjet printing apparatus 100 has a platen 3, an after-heater 4, a take-up gear 5, and a cooler. The platen 3 heats a medium 20 to a temperature lower than or equal to a glass-transition temperature Tg.sub.1 of a resin included in the medium 20. The after-heater 4 heats the medium 20 to a temperature higher than or equal to a glass-transition temperature Tg.sub.2 of a resin contained in the ink. The take-up gear 5 collects the printed medium 20. The medium 20 or the take-up gear 5 is cooled by the cooler so as to reach a temperature lower than both the temperature Tg.sub.1 and the temperature Tg.sub.2.

A drying device for drying a recording medium is provided. The drying device includes a plurality of heating roller units independently detachable from the drying device. The heating roller units includes at least one upstream heating roller unit disposed upstream relative to a conveyance direction of the recording medium and at least two downstream heating roller units disposed downstream relative to the conveyance direction of the recording medium. Each upstream heating roller unit includes an upstream heating roller, two upstream temperature detectors, and two upstream controllers. The upstream heating roller includes two upstream heat sources having different heating areas. The two upstream temperature detectors are disposed at respective end parts of the upstream heating roller, to detect temperatures of the respective upstream heat sources to output signals. The two upstream controllers control the respective upstream heat sources based on the respective signals from the respective upstream temperature detectors.

A heating device includes a conveyor configured to convey a sheet, the sheet having a first surface on which a liquid is applied and a second surface contacting the conveyor, a first heater facing the first surface opposite to the second surface of the sheet, the first heater configured to heat the sheet, and a second heater configured to heat the conveyor.