Image forming apparatus, method and computer-readable storage medium for distinguishably controlling tab sheet discharge

1. An image forming apparatus, comprising:

a tab sheet supply unit for supplying a first tab sheet set having a particular number of tab sheets and a second tab sheet set having a different number of tab sheets than the first tab sheet set; and

a control unit that controls to distinguishably discharge tab sheets that became no longer necessary according to whether a no longer necessary tab sheet is from each the first set of tab sheets or from the second set of tab sheets.

2. The image forming apparatus as claimed in claim 1 , wherein said control unit controls to discharge the tab sheets that became no longer necessary to different discharge trays for each of the first and second sets of tab sheets.

3. The image forming apparatus as claimed in claim 1 , wherein said control unit controls to discharge the tab sheets that became no longer necessary by inserting a separating sheet at a tab sheet break between a no longer necessary tab sheet from the first set of tab sheets and a no longer necessary tab sheet from the second sets of tab sheets.

4. The image forming apparatus as claimed in claim 1 , wherein said control unit controls to discharge the tab sheets that became no longer necessary by offsetting the discharge position according to whether a no longer necessary tab sheet is from the first set of tab sheets or from the second set of tab sheets.

5. The image forming apparatus as claimed in claim 1 , further comprising a reversing unit for reversing a no longer necessary tab sheet from the first set of tab sheets or the second sets of tab sheets so that the no longer necessary tab sheet is reused as a tab sheet with a tab position different from an original tab position.

6. A method executed on an image forming apparatus comprising:

supplying a first tab sheet set having a particular number of tab sheets and a second tab sheet set having a different number of tab sheets than the first tab sheet set; and

distinguishably discharging the tab sheets that became no longer necessary according to whether a no longer necessary tab sheet is from the first set of tab sheets or from the second set of tab sheets.

7. The method as claimed in claim 6 , further comprising reversing a no longer necessary tab sheet from the first set of tab sheets or the second sets of tab sheets so that the no longer necessary tab sheet is reused as a tab sheet with a tab position different from an original tab position.

8. A non-transitory computer readable recording medium stored with a control program for controlling an image forming apparatus, said control program causing a computer to execute a process comprising:

accepting a request for initiating a setup concerning a first tab sheet set having a particular number of tab sheets and a second tab sheet set having a different number of tab sheets than the first tab sheet set; and

providing to the user a tab sheet discharge setup section for distinguishably discharging the tab sheets that became no longer necessary according to whether a no longer necessary tab sheet is from the first set of tab sheets or from the second set of tab sheets.

9. The computer readable recording medium as claimed in claim 8 , wherein

said tab sheet discharge setup section includes a separate discharge setup section for setting up the discharge of tab sheets that became no longer necessary by discharging them into separate discharge trays; a separation sheet insertion setup section for setting up the insertion of a separation sheet at a tab sheet change point between a no longer necessary tab sheet from the first set of tab sheets and a no longer necessary tab sheet from the second sets of tab sheets when discharging tab sheets that became no longer necessary; and an offset setup section for setting up the positions of discharging tab sheets that became no longer necessary by offsetting the positions in accordance with whether a no longer necessary tab sheet is from the first set of tab sheets or from the second set of tab sheets, wherein one of said separate discharge setup section, said separation sheet insertion setup section, and said offset setup section is allowed to be selected by the user.

10. The non-transitory computer readable recording medium as claimed in claim 8 , wherein the process further includes reversing a no longer necessary tab sheet from the first set of tab sheets or the second sets of tab sheets so that the no longer necessary tab sheet is reused as a tab sheet with a tab position different from an original tab position.

11. A method for controlling an image forming apparatus comprising:

accepting a request for initiating a setup concerning a first tab sheet set having a particular number of tab sheets and a second tab sheet set having a different number of tab sheets than the first tab sheet set; and

providing to the user a tab sheet discharge setup section for distinguishably discharging the tab sheets that became no longer necessary according to whether a no longer necessary tab sheet is from the first set of tab sheets or from the second set of tab sheets.

12. The method as claimed in claim 11 , further comprising reversing a no longer necessary tab sheet from the first set of tab sheets or the second sets of tab sheets so that the no longer necessary tab sheet is reused as a tab sheet with a tab position different from an original tab position.