An inkjet printer is provided, which is configured to acquire gap information related to a gap between an ink discharging surface and a recording sheet in each individual position of top-formed positions and bottom-formed positions within a predetermined wave-shape generating range, identify, when the predetermined wave-shape generating range includes a partial range in which the recording sheet is not placed, a top-formed position where the gap information has not been acquired and a bottom-formed position where the gap information has not been acquired, within the partial range, complement the unacquired gap information in the identified top-formed position with a value determined based on the respective pieces of gap information acquired in other top-formed positions, and complement the unacquired gap information in the identified bottom-formed position with a value determined based on the respective pieces of gap information acquired in other bottom-formed positions.

An inkjet printer is provided that is configured to store a plurality of pieces of gap information respectively corresponding to a plurality of examined sections discretely arranged along a head moving direction on a recording sheet, each of the plurality of examined sections including a corresponding one portion of top portions and bottom portions on the recording sheet, and calculate interpolation gap information to be interpolated over a whole width in the head moving direction of at least one of a plurality of segments, each of which has a width in the head moving direction defined by two adjacent sections of the plurality of examined sections, based on the stored gap information.

An inkjet printer, including an inkjet head, a conveyer unit to convey a recording medium in a conveying direction, a position detecting unit to detect a position of the recording medium along the conveying direction, a wave shape generating mechanism to deform the recording medium into a predetermined wave shape along a direction orthogonal to the conveying direction, a gap information storing device to store gap information related to a gap between an ink discharging surface of the inkjet head and the recording medium, and a correcting device to correct the gap information according to a position of the recording medium along the conveying direction, is provided.

The ink is discharged to the printing medium F located in the first range R1 from the upstream end Wuu of the upstream winding part Wu where the support roller 26a and the printing medium F are in contact to the downstream end Wdd of the downstream winding part Wd where the support roller 26e and the printing medium F are in contact. The support rollers 26a, 26e located on both ends of the first range R1 are in contact with the printing medium F on the peripheral surfaces 261 having such a concave shape to increase the diameter from the center toward the ends in the width direction Y (axial direction). This causes these support rollers 26a, 26e to suppress the formation of wrinkles in the first range R1 where the ink is discharged.

A wrinkle detector for detecting creases or wrinkles to protect a print head of a fabric printer from occlusion by protruding fabric. The wrinkle detector comprises a mounting located in advance of a print head relative to fabric approaching to be printed, the mounting comprising one or more deflectable elements extending into a predetermined clearance zone between the printing head and the fabric, wherein deflection of the elements is used as an indicator of fabric protruding into the clearance zone. The detector may be used to halt or modify printing, in particular ink jet printing of the fabrics so that occlusion does not block the printing nozzles.

An inkjet printer including an inkjet head, a head scanning unit, a wave shape generating mechanism to deform a recording medium into a predetermined wave shape, an obtaining device to obtain information concerning a type of the recording medium to be used in a printing operation, a gap information storing device to store gap information related to a gap between an ink discharging surface and the recording medium in association with a predetermined type of the recording medium, the gap information being acquired from a predetermined range in the recording medium, and a correcting device to correct the gap information according to the type of the recording medium obtained by the obtaining device when the type of the recording medium obtained by the obtaining device is different from the predetermined type of the recording medium stored in association with the gap information, is provided.

When a wave shape is formed in a sheet of paper, a suppression of a reduction in recording quality that is caused by a shape of the paper is achieved, and thus, favorable recording quality is obtained.

In one example, a shroud to protect a group of printheads in a printhead assembly includes a body having a first notched end where an upstream part of the body extends past a downstream part of the body and a second notched end opposite the first end where a downstream part of the body extends past an upstream part of the body. A first group of openings in the body is aligned across the upstream part of the body and a second group of openings in the body is aligned across the downstream part of the body. Each opening is to surround an exposed part of a printhead when the shroud is installed on the printhead assembly.

A liquid discharging device including a transporting unit configured to transport a medium in a transport direction, a winding unit disposed on a downstream side of the transporting unit in the transport direction and configured to wind the medium, a recording head disposed between the transporting unit and the winding unit and configured to discharge ink onto the medium positioned in a discharge range, a medium supporting unit configured to support the medium positioned in the discharge range, and a medium guide unit disposed on a downstream side of the medium supporting unit in the transport direction, and heated by a heater, and moreover including a curved portion curved in a direction away from the recording head, wherein the curved portion includes a curved portion side convex portion group including curved portion side convex portions projecting in a direction approaching the recording head and arranged in an X direction.

A web printing apparatus comprising a support platen facing the processing station for supporting the web, when being processed by the processing station and a first guard for guarding a side edge of a web, the first guard being connectable to the support platen for guiding the web along a transport path, when the web is processed by the processing station. A detector is provided for detecting the first guard when connected to the support platen as well as a control unit configured for controlling the processing station to process the web, wherein the control unit is configured to identify the guard based on a detection signal provided by the detector to the control unit. Thereby, the first guard is identified by the control unit which may then control the movement of the print carriage to avoid the first guard, preventing collisions.