Patent ID: 9221284
Filing Date: 2015-12-29
Classification: B41J

Abstract:
1. An image forming apparatus comprising: a recording head in which a plurality of nozzles for discharging liquid droplets is arranged in a sub-scanning direction; and a pattern forming unit configured to form a test pattern used for positional deviation adjustment including a first pattern serving as a reference pattern and a second pattern serving as an adjustment pattern; wherein the first pattern and the second pattern each extend for lengths in a direction parallel to the sub-scanning direction and separated by a distance in a main-scanning direction; wherein the first pattern and the second pattern each include a not-printed portion with printed portions formed on both sides of the not-printed portion in the sub-scanning direction; wherein the not-printed portions of the first and the second pattern are shifted from each other in the sub-scanning direction; and wherein the printed portions of the first and the second pattern overlap in the main-scanning direction for a majority of their respective lengths in the sub-scanning direction.