IMAGE FORMING APPARATUS AND PAPER EJECTION METHOD OF IMAGE FORMING APPARATUS

• US 20090317116A1
• Filed: 08/27/2009
• Published: 12/24/2009
• Est. Priority Date: 07/15/2004
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: SHISHIKURA, Kenichiro
• Granted Patent: US 7,899,388 B2
• Time in Patent Office: Days
• US Class Current: 399/68
• CPC Class Codes: G03G 15/6573 Feeding path after the fixing point and up to the discharge tray or the finisher, e.g. special treatment of copy material to compensate for effects from the fixing
• CPC Class Codes: G03G 2215/00426 Post-treatment device adding qualities to the copy medium product G03G2215/00421 takes precedence
• CPC Class Codes: G03G 2215/00827 Stapler

Abstract

A drive unit for changing the driving rate of paper ejection rollers for ejecting sheets of paper after fixing is installed, and an image forming apparatus has an option, and when ejecting the sheets of paper to an intra-body paper ejection unit, after the sheets of paper pass a fixing device, the paper ejection rate of paper ejection rollers 24 is increased, and the ejection force of the sheets of paper P is increased, and paper jamming at the time of paper ejection to the intra-body paper ejection unit is prevented.

Claims

1. An image forming apparatus, comprising:

an image forming portion configured to form a toner image on a recording media;

a fixing unit configured to clamp and convey said recording media and fixing said toner image;

an ejection unit installed on a downstream side of said fixing unit configured to eject said recording media;

a first stacking unit configured to stack said recording media ejected from said ejection unit;

a second stacking unit configured to stack said recording media ejected from said ejection unit;

a conveying unit configured to convey said recording media ejected from said ejection unit to said second stacking unit; and

a drive unit configured to drive said ejection unit at a first speed when said ejection unit ejects said recording media to said first stacking unit and configured to drive said ejection unit at a second speed faster than said first speed when said ejection unit ejects said recording media to said second stacking unit, after an end edge of said recording media passes said fixing unit.

2. The apparatus according to claim 1, wherein said drive unit drives said ejection unit at said second speed when a height of said recording media stacked in said second stacking unit is equivalent to a nip position of said ejection unit or higher.

3. The apparatus according to claim 1, wherein said drive unit drives said ejection unit at said second speed when a length of said recording media is a fixed length or longer.

4. The apparatus according to claim 1, wherein said first speed is the same as a clamping and conveying rate of said recording media by said fixing unit.

5. The apparatus according to claim 1, further comprising an optional device, wherein said optional device is connected to said conveying unit, said drive unit drives said ejection unit at said first speed when said recording media is ejected toward said conveying unit and drives said ejection unit at said second speed faster than said first speed when the end edge of said recording media passes said fixing unit and said recording media is ejected toward said second unit.

6. The apparatus according to claim 1, wherein said image forming portion forms the toner image at the first speed.

7. An image forming apparatus, comprising:

an image forming portion configured to form a toner image on a recording media;

a fixing unit configured to fix said toner image on said recording media;

an ejection unit installed on a downstream side of said fixing unit configured to eject said recording media to first and second conveying paths; and

a drive unit configured to drive said ejection unit at a first speed when said ejection unit ejects said recording media to said first conveying path and to drive said ejection unit at a second speed, faster than said first speed, when said ejection unit ejects said recording media to said second conveying paths

8. The apparatus according to claim 7, further comprising a gate configured to guide said recording media ejected from said ejection unit to said first and second conveying paths.

9. The apparatus according to claim 7, wherein said drive unit drives said ejection unit at said second speed when a length of said recording media is a fixed length or longer.

10. The apparatus according to claim 7, wherein said first speed is the same as a clamping and conveying speed of said recording media by said fixing unit.

11. The apparatus according to claim 7, further comprising an optional device configured to be detachably connected to said first conveying path.

12. An image forming apparatus, comprising:

an image forming portion configured to form a toner image on a recording media;

a fixing unit configured to fix said toner image on said recording media;

an ejection unit installed on a downstream side of said fixing unit configured to eject said recording media;

first and second stacking units configured to stack said recording media ejected from said ejection unit; and

a drive unit configured to drive said ejection unit at a first speed when said ejection unit ejects said recording media to said first stacking unit and to drive said ejection unit at a second speed, faster than said first speed, when said ejection unit ejects said recording media to said second stacking unit.

13. The apparatus according to claim 12, wherein said drive unit drives said ejection unit at said second speed when a length of said recording media stacked in said second stacking unit is at a predetermined height or higher.

14. The apparatus according to claim 12, wherein said drive unit drives said ejection unit at said second speed when a length of said recording media is a fixed length or longer.

15. The apparatus according to claim 12, wherein said first speed is the same as a clamping and conveying speed of said recording media by said fixing unit.

16. An image forming apparatus, comprising:

an image forming portion configured to form a toner image on a recording media;

a fixing unit configured to fix said toner image on said recording media;

an ejection unit installed on a downstream side of said fixing unit configured to eject said recording media to first and second conveying paths;

first and second stacking units configured to stack said recording media ejected from said ejection unit via the first and second conveying paths; and

a drive unit configured to drive said ejection unit at a first speed when said ejection unit ejects said recording media to said first stacking unit and to drive said ejection unit at a second speed, faster than said first speed, when said ejection unit ejects said recording media to said second stacking unit.

17. The apparatus according to claim 16, further comprising a gate configured to guide said recording media ejected from said ejection unit to said first and second conveying paths.

18. The apparatus according to claim 16, wherein said drive unit drives said ejection unit at said second speed when a length of said recording media stacked in said second stacking unit is at a predetermined height or higher.

19. The apparatus according to claim 16, wherein said drive unit drives said ejection unit at said second speed when a length of said recording media is a fixed length or longer.

20. The apparatus according to claim 16, wherein said first speed is the same as a clamping and conveying speed of said recording media by said fixing unit.