Patent ID: 9623685
Date: 2017-04-18
CPC Classifications: B41J

Claim:
1. An inspecting chart for determining a correction value for correcting a skew or serpentine transportation of a print medium, the inspecting chart comprising: a reference pattern containing a first line segment group and a second line segment group, the first line segment group is formed by a plurality of first line segments printed by a reference printing head on the print medium at a first given interval, the first line segments each having a first line width orthogonal to a transportation direction of the print medium, the second line segment being formed by second line segments printed by a printing head on a center between two adjacent first line segments or a center of each of the first line segments, the printing head being spaced away from the reference printing head in the transportation direction of the print medium, and the second line segments each having a second line width and being parallel to the first line segments; a first-side deviation pattern spaced away from the reference pattern in the transportation direction of the print medium, and including the first line segment group and a second line segment group, the second line segment group being formed by the second line segments printed by a given deviation from the center between two adjacent first line segments or the center of the first line segment toward the transportation direction of the print medium; and a second-side deviation pattern spaced away from the reference pattern in the transportation direction of the print medium opposite to the first-side deviation pattern across the reference pattern, and including the first line segment group and a second line segment group, the second line segment group being formed by the second line segments printed by a given deviation from the center between the two adjacent first line segments or the center of the first line segment toward a second side of the transportation direction of the print medium, the first-side deviation pattern and the second-side deviation pattern being printed with various deviations.