Patent ID: 7629991

Claim:
A write controlling device for an image forming apparatus comprising: a time lag detecting device configured (i) to detect a time lag between (a) synchronization signal generated by a synchronization detecting device and (b) a mark signal generated by a mark sensor configured to detect a mark on a transfer belt configured to transfer plural color toner components; and (ii) to output a white line insertion value using the detected time lag, the white line insertion value reflecting the number of white lines to be inserted; a reconfiguration device configured to reconfigure the white line insertion value and a write timing setting value defining a writing start position in a sub-scanning direction using a write timing ancillary value which defines the quantity of reconfiguration; and a storage device configured to store said write timing setting value and said write timing ancillary value; wherein the storage device stores a plurality of write timing ancillary values, the write timing ancillary values are associated with a color and a page position where the color toner component will be transferred, respectively, and the page position is a first page, a last page, or an intervening page.