| US 7,542,162 B2 | ||
| Image forming apparatus and image forming method | ||
| Masataka Muratani, Akishima (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan); and Toshiba Tec Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Dec. 01, 2003, as Appl. No. 10/724,157. | ||
| Prior Publication US 2005/0117174 A1, Jun. 02, 2005 | ||
| Int. Cl. G06F 15/00 (2006.01) | ||
| U.S. Cl. 358—1.18 [358/1.13; 358/448] | 8 Claims |
| 1. An image forming apparatus having an automatic double-side unit and being capable of effecting printing on both surfaces
of a paper sheet, comprising:
setting section which sets an adjustment mode at a time of effecting printing on both surfaces of the paper sheet;
first storage section which stores predetermined image data that is used in the adjustment mode set by the setting section;
first control section which executes a control to form an image on a first surface of the sheet using the image data stored
in the first storage section, when the setting section sets the adjustment mode;
first sensor which measures a size of the image formed on the first surface of the sheet by measuring a passage time of the
predetermined image formed on the first surface of the sheet, when the image formed on the first surface of the sheet is subjected
to thermal fixation and conveyed;
second control section which executes a control to form an image on a second surface of the sheet using the image data stored
in the first storage section, when the sheet is reversely fed by the automatic double-side unit;
second sensor which measures a size of the image formed on the second surface of the sheet by measuring a passage time of
the predetermined image formed on the second surface of the sheet, when the image formed on the second surface of the sheet
is subjected to thermal fixation and conveyed;
calculation section which calculates correction data for a printing magnification for image formation on the second surface
of the sheet, on the basis of a speed of conveyance of the paper sheet, a passage time of the predetermined image measured
by the first sensor, and a passage time of the predetermined image measured by the second sensor; and
second storage section which stores the correction data calculated by the calculation section.
|