Patent ID: 8672439
Filing Date: 2014-03-18
Classification: B41J

Abstract:
1. A printing apparatus, comprising: a conveying unit configured to convey a sheet in a first direction; a carriage, holding a print head, configured to reciprocate along a second direction intersecting the first direction for performing serial printing onto the sheet by repeating print steps with the print head and conveyance steps with conveying unit; a sensor unit mounted on the carriage configured to measure a moving amount of the sheet in the first direction; and a control unit configured to control such that, in accordance with reciprocation of the carriage, the sensor unit performs a first measurement to measure a moving amount of the sheet at a first position in a vicinity of one side of the sheet when one of the conveyance steps is performed, then performs a second measurement to measure a moving amount of the sheet at a second position in a vicinity of the other side of the sheet when the next one of the conveyance steps is performed, wherein the control unit is configured to obtain information on a skew state of the sheet, by comparing a result of the first measurement with a result of the second measurement.