A liquid discharge apparatus includes a conveyance roller, a liquid discharge head, and a control device. The control device controls the head to discharge liquid onto a medium X times in the main scanning direction and Y times in the sub-scanning direction and controls the roller such that a position of a droplet on the medium discharged by an m-th discharge and a position of another droplet on the medium discharged by an (m+Y)-th discharge are same in the sub-scanning direction, where m is an integer not smaller than one and not greater than ((X−1)×Y). Where P is a circumferential length of the roller and L is a difference in a conveyance distance in the sub-scanning direction when the m-th discharge is compared with the (m+Y)-th discharge, the following relation is satisfied:
L=(n+(Δθ/2π))×P, where |π−Δθ|<60° and n is an integer.

A liquid discharge apparatus includes a conveyance roller, a liquid discharge head, and a control device. The control device controls the head to discharge liquid onto a medium X times in the main scanning direction and Y times in the sub-scanning direction and controls the roller such that a position of a droplet on the medium discharged by an m-th discharge and a position of another droplet on the medium discharged by an (m+Y)-th discharge are same in the sub-scanning direction, where m is an integer not smaller than one and not greater than ((X−1)×Y). Where P is a circumferential length of the roller and L is a difference in a conveyance distance in the sub-scanning direction when the m-th discharge is compared with the (m+Y)-th discharge, the following relation is satisfied:
L=(n+(Δθ/2π))×P, where |π−Δθ|<60° and n is an integer.

A data-generating unit of an inkjet recording apparatus recognizes, based on a detection signal of a recording medium output from a recording medium detection sensor, an open part region that is a region of an open part located in a position shifted from a recording medium detected by the recording medium detection sensor in a transport direction among regions of a plurality of open parts included in an open part reading data read by an open part detection sensor to generate flushing data in accordance with the open part region. A flushing control unit recognizes at least one non-image-forming period in which the open part corresponding to the region passes a position facing the recording head by running of the transport belt, based on the detection signal, and causes the recording head to execute flushing, based on flushing data, in the at least one non-image-forming period.

A data-generating unit of an inkjet recording apparatus recognizes, based on a detection signal of a recording medium output from a recording medium detection sensor, an open part region that is a region of an open part located in a position shifted from a recording medium detected by the recording medium detection sensor in a transport direction among regions of a plurality of open parts included in an open part reading data read by an open part detection sensor to generate flushing data in accordance with the open part region. A flushing control unit recognizes at least one non-image-forming period in which the open part corresponding to the region passes a position facing the recording head by running of the transport belt, based on the detection signal, and causes the recording head to execute flushing, based on flushing data, in the at least one non-image-forming period.

A method is provided for controlling a web in a printing apparatus The printing apparatus includes a transport assembly for moving the web through a transport path along a printing unit for printing an image onto a print area of the web. The method includes feeding the web from a supply roll through the transport path to the transport assembly; and switching the printing apparatus to a ready-to-print mode, wherein the printing unit does not print an image on the web and the web is maintained ready to be printed on. In a printing mode after the ready-to print mode, the following steps are performed: moving the web through the transport path in a transport direction along the printing unit by the transport assembly; and printing the image onto the print area of the web by the printing unit. The image is printed by applying an image material, which solidifies on the web during the printing step. The ready-to-print mode includes the step of: operating the transport assembly to prevent a deformation of the print area of the web in the transport path, while maintaining the web in the ready-to-print mode. The web is maintained ready to print while preventing a deformation of the print area of the web in the transport path.

A printing apparatus includes a first discharge path that discharges a sheet and a second discharge path different from the first discharge path. An angle difference between a direction in which the sheet is discharged in the second discharge path and a conveyance direction of a conveyance roller is smaller than an angle difference between a direction in which the sheet is discharged in the first discharge path and the conveyance direction of the conveyance roller. The printing apparatus includes a control unit that discharges the sheet on which the image is printed using the second discharge path even in a case where an instruction to print an image indicates discharging the sheet to the first discharge path, if the sheet conveyed by the conveyance roller is a sheet having a thickness equal to or greater than a predetermined value.

An apparatus includes a printing unit, a conveyance unit including first and second rotating members that nip and convey the sheet, and configured to hold the sheet by temporarily stopping the conveyance before completion of discharge of the sheet, a detection unit configured to detect a rotation of the first rotating member, a determination unit configured to determine whether the sheet has been pulled in a discharge direction based on a detection result of the detection unit in a case where the conveyance unit holds the sheet, and a control unit configured to, if the determination unit determines that the sheet has been pulled in the discharge direction, cause the conveyance unit to perform a discharging process of the sheet.

In an example of the disclosure, a first optical sensor positioned adjacent to a web path and having a first sensor beam is utilized to identify a first signal value as the first optical sensor detects an eye-mark as the web is moved along the web path. A second optical sensor positioned adjacent to the web path, downstream of the first optical sensor, and having a second sensor beam, is utilized to identify a second signal value as the second optical sensor detects the eye-mark. A lateral misalignment of the web is determined based upon the first signal value, the second signal value, and a lateral offset of the first sensor beam from the second sensor beam.

A printing apparatus includes a first projecting/retracting portion located at a first pressing position when a diameter of a roll paper R is larger than a first diameter and located at a first release position when the diameter of the roll paper R is smaller than the first diameter in a case where the printing apparatus is installed in a first posture, a second projecting/retracting portion located at a second pressing position when the diameter of the roll paper R is larger than a second diameter and located at a second release position when the diameter of the roll paper R is smaller than the second diameter in a case where the printing apparatus is installed in a second posture, and a detection section having a single sensor and detecting a displacement of the first projecting/retracting portion and a displacement of the second projecting/retracting portion by the sensor.

A printing apparatus includes a first projecting/retracting portion located at a first pressing position when a diameter of a roll paper R is larger than a first diameter and located at a first release position when the diameter of the roll paper R is smaller than the first diameter in a case where the printing apparatus is installed in a first posture, a second projecting/retracting portion located at a second pressing position when the diameter of the roll paper R is larger than a second diameter and located at a second release position when the diameter of the roll paper R is smaller than the second diameter in a case where the printing apparatus is installed in a second posture, and a detection section having a single sensor and detecting a displacement of the first projecting/retracting portion and a displacement of the second projecting/retracting portion by the sensor.