IMAGE FORMING APPARATUS AND DEVELOPING CARTRIDGE

• US 20070217816A1
• Filed: 03/16/2007
• Published: 09/20/2007
• Est. Priority Date: 03/20/2006
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha
• Original Assignee: Brother Kogyo Kabushiki Kaisha
• Inventors: SHIRAKI, Masatoshi
• Granted Patent: US 7,715,755 B2
• Time in Patent Office: Days
• US Class Current: 399/111
• CPC Class Codes: G03G 15/0896 Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894
• CPC Class Codes: G03G 21/1647 Mechanical connection means
• CPC Class Codes: G03G 21/1676 for the developer unit
• CPC Class Codes: G03G 2221/163 for the developer unit
• CPC Class Codes: G03G 2221/1654 Locks and means for positioning or alignment

Abstract

A handle for a toner cartridge is described. The handle may include an opening and be constructed of one or elastically deformable materials. The handle may deform when inside of an image forming device to provide at least some force to press an image carrier against a developer carrier.

Claims

1. An image forming apparatus, comprising:

a casing;

an image carrier unit configured to move in a first direction between a first position and a second position in the casing, the image carrier unit configured to hold a plurality of image carriers, each image carrier configured to carry an electrostatic latent image thereon;

a plurality of developing cartridges configured to be removably mounted in the image carrier unit; and

an exposure unit disposed in the casing;

wherein each developing cartridge includes;

a developer carrier configured to supply developer to the image carrier;

a case configured to contain the developer, the case having a support portion for supporting the developer carrier at one side of the case; and

a handle made of elastic material and connected to at least an opposite side of the case, the handle being configured to contact the exposure unit and to deform when the image carrier unit is in the first position.

2. The image forming apparatus according to claim 1, wherein the handle of at least one developing cartridge is out of contact with the exposure unit when the image carrier unit is in the second position.

3. The image forming apparatus according to claim 1, wherein, when the image carrier unit is in the first position, the handle urges the developer carrier toward the image carrier.

4. The image forming apparatus according to claim 3, wherein the developer carrier extends in a second direction perpendicular to the first direction, and the handle is disposed at each end of the case in the second direction.

5. The image forming apparatus according to claim 1, wherein the handle is of a shape forming an opening.

6. The image forming apparatus according to claim 5, wherein the handle extends along the first direction and the opening faces in the second direction.

7. The image forming apparatus according to claim 1, wherein the handle forms an opening with the case.

8. The image forming apparatus according to claim 1, wherein at least part of the handle is deformable.

9. The image forming apparatus according to claim 1, wherein the handle only contacts the opposite side of the case.

10. A developing cartridge configured to be installed in an image forming apparatus, comprising:

a developer carrier configured to supply developer to an image carrier of the image forming apparatus;

a case configured to contain the developer, the case having a support portion for supporting the developer carrier at one side of the case; and

a handle made of elastic material and disposed at least on an opposite side of the case, the handle being configured to deform when the developing cartridge is installed in the image forming apparatus.

11. The developing cartridge according to claim 10, wherein the developing cartridge is removably mounted on an image carrier unit that is configured to move along a first direction between a first position and a second position with respect to the image forming apparatus and when the image carrier unit is in the first position, the handle urging the developer carrier toward the image carrier.

12. The developing cartridge according to claim 10, wherein the handle forms an opening.

13. The developing cartridge according to claim 12, wherein the handle extends along the first direction and the opening faces in a second direction perpendicular to the first direction.

14. The developing cartridge according to claim 13, wherein the developer carrier extends in the second direction and the handle is disposed at each end of the case in the second direction.

15. The developing cartridge according to claim 10, wherein at least part of the handle is deformable.

16. The developing cartridge according to claim 10, wherein the handle forms an opening with the case.

17. A method for pressing and separating a developer carrier of a developing cartridge from an image carrier in an image forming apparatus comprising:

deforming a deformable handle of the developing cartridge from an undeformed state to a first deformed state upon insertion of the developing cartridge into the image forming apparatus, the deformation resulting in pressing the developer carrier of the developing cartridge against the image carrier;

separating the developer carrier from the image carrier by lifting the developing cartridge away from the image carrier, the deformable handle continuing to be deformed in at least in the first deformed state.

18. The method according to claim 17, wherein separating the developer carrier results in a second deformed state, where the deformation of the handle of the developing cartridge is greater in the second deformed state than in the first deformed state.

19. The method according to claim 17, wherein the lifting of the developing cartridge includes engaging a separation mechanism that forces a protrusion of the developing cartridge in a direction away from the image carrier.

20. The method according to claim 17, the image forming apparatus including at least three additional developing cartridges, the separating the developer carrier further comprising:

separating developer carriers of the developing cartridge and a second and a third of the three additional developing cartridges, where a developer carrier of a third of the three additional developing cartridges remains in contact with the image carrier.