| 摘要 |
PROBLEM TO BE SOLVED: To suppress variation of a gap between an inkjet head and a recording medium on which waveform is generated.SOLUTION: Protrusion parts 22a and 22b which are provided on outer peripheral surfaces 21a and 21b of pressing rollers 7a and 7b respectively opposed to the upper surface and lower surface of a recording medium P, protrude from the outer peripheral surfaces 21a and 21b respectively, and spirally extend along an axial direction of the pressing rollers 7a and 7b. The recording medium P is locally pressed by the protrusion parts 22a and 22b to generate waveform on which a plurality of mountain parts Pm and a plurality of valley parts Pv are alternately aligned in a scan direction. The mountain parts Pm and the valley parts Pv are moved to a moving direction of a carriage 2 by turning the pressing rollers 7a and 7b to move portions of the protrusion parts 22a and 22b for pressing the recording medium P in the moving direction of the carriage 2 when ink is discharged from an inkjet head 3 while the carriage 2 is moving to the scan direction. |
