Patent ID: 8998402
Filing Date: 2015-04-07
Classification: B41J

Abstract:
1. A printing apparatus comprising: a line-type print head having a nozzle array for inkjet printing extending along a first direction across a range covering a width of a sheet being used; a movable guide unit disposed facing the print head and configured to guide a back surface of the sheet being conveyed in a second direction perpendicular to the first direction, wherein the back surface is a reverse side of a surface being printed by the print head, wherein the guide unit has a first movable guide and a second movable guide disposed corresponding to both sides in the first direction; a receiving unit disposed under the guide unit and facing the print head, configured to receive ink discharged from the print head, the receiving unit extending to cover the nozzle array; and a mechanism configured to change positions of the first and the second movable guides in the first direction while the receiving unit is unmoved to change an interval between the first and the second movable guides according to a size of the sheet being used, wherein the mechanism has a first lead screw for moving the first movable guide and a second lead screw for moving the second movable guide and the first and the second lead screws are rotated independently by different motors, wherein, in a first state in which there is a sheet having a maximum sheet width assumed to be used, the guide unit is positioned behind the sheet and located so as not to be exposed outside the sheet while the receiving unit is exposed outside the sheet, as viewed from the print head, wherein, in a second state in which there is a sheet having a minimum sheet width assumed to be used, the first and the second movable guides are located so as to be exposed outside the sheet while the receiving unit is exposed between the first and the second movable guides and an edge of the sheet, as viewed from the direction of the print head, and wherein positions of the first and the second movable guides are set such that each of the first and the second movable guides are located at a same position in the first state and the second state.