Patent ID: 8382223
Filing Date: 2013-02-26
Classification: B41J

Abstract:
1. An image forming apparatus comprising: a replaceable ink cartridge configured to store ink; a recording head; a sub tank configured to store the ink supplied from the ink cartridge and to supply the ink to the recording head; an ink amount managing unit configured to manage a remaining amount of ink remaining within each of the ink cartridge and the sub tank; a storage unit configured to store raster data of image data to be recorded for a recording job; a computing unit configured to compute an amount of ink to be used to record the raster data stored in the storage unit when the remaining amount of ink within the ink cartridge managed by the ink amount managing unit reaches a predetermined amount; and a recording control unit configured to enable the recording when the remaining amount of ink within the sub tank managed by the ink amount managing unit is greater than the amount of ink computed by the computing unit, and to disable the recording when the remaining amount of ink within the sub tank managed by the ink amount managing unit is less than or equal to the amount of ink computed by the computing unit.