Image forming method and apparatus including an easy-to-handle large capacity toner container

• US 6,882,817 B2
• Filed: 04/14/2003
• Issued: 04/19/2005
• Est. Priority Date: 04/12/2002
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Kita, Emi
• Primary Examiner(s): BEATTY, ROBERT B
• Application Number:
  US10/412,390
• Publication Number:
  US 20030215267A1
• Time in Patent Office: 736 Days
• Field of Search: 399/119, 399/252, 399/254, 399/258, 399/262, 222/DIG.1
• US Class Current: 399/258
• CPC Class Codes: G03G 15/0875 cartridges having a box like shape
• CPC Class Codes: G03G 15/0877 Arrangements for metering and dispensing developer from a developer cartridge into the development unit
• CPC Class Codes: G03G 15/0879 for dispensing developer from a developer cartridge not directly attached to the development unit

Abstract

An image forming apparatus and associated method is provided and includes a development mechanism, a toner storage, and a toner transportation mechanism. The development mechanism develops an electrostatic latent image formed on an image carrying member into a visual image. The toner storage is detachably installed in the apparatus and stores toner. The toner transportation mechanism transports the toner from the toner storage to the development mechanism. The toner storage is movable together with a part of the toner transportation mechanism between a closed position which is a normal position of the toner storage containing toner and a tilt position at which the toner storage is exchanged with a new toner storage.

Claims

1. An image forming apparatus, comprising:

a development mechanism configured to develop an electrostatic latent image formed on an image carrying member into a visual image;

a toner storage detachably installed in the apparatus and configured to store toner therein; and

a toner transportation mechanism configured to transport the toner from the toner storage to the development mechanism, the toner transportation mechanism including a tube device connected to the toner storage for transporting the toner, the tube device comprising a plurality of tube sections.

wherein the toner storage is movable together with at least one of the plurality of tube sections between a normal position in which the toner storage containing toner is stowed inside the apparatus and an exchange position in which the toner storage is moved at least partially out of the apparatus for exchange with a new toner storage.

2. The image forming apparatus as defined in claim 1, wherein the plurality of tube sections includes a flexible tube.

3. The image forming apparatus as defined in claim 1, wherein the toner transportation mechanism includes a screw pump including an elastic stator internally having spiral grooves in a two-screw shape and a rotor rotating inside the stator to transport the toner in an axis direction, and the toner is transported to the development mechanism by an action of a negative pressure generated by the screw pump.

4. The image forming apparatus as defined in claim 1, wherein the toner storage is movable between the normal position and the exchange position by a rotational movement.

5. The image forming apparatus as defined in claim 2, wherein the toner storage comprises a rotation shaft positioned to pivot the toner storage between the normal position and exchange position, and the flexible tube is arranged in close proximity to the rotation shaft of the toner storage.

6. The image forming apparatus as defined in claim 1, wherein the toner storage comprises a rotation shaft positioned to pivot the toner storage between the normal position and exchange position, and the plurality of tube sections includes at least two tube sections joined with a connector positioned in close proximity to the rotation shaft of the toner storage.

7. The image forming apparatus as defined in claim 6, wherein the at least two tube sections of the plurality of tube sections include at least one tube section comprising a flexible material.

8. An image forming apparatus, comprising:

developing means for developing an electrostatic latent image formed on an image carrying member into a visual image;

storing means for storing toner; and

a toner transporting mechanism configured to transport the toner from the storing means to the developing means, the toner transporting mechanism including a tube device connected to the storing means for transporting the toner, the tube device comprising a plurality of tube sections.

wherein the storing means is movable together with at least one of the plurality of tube sections between a normal position in which the storing means containing toner is stowed inside the apparatus and an exchange position in which the storing means is moved at least partially out of the apparatus for exchange with a new storing means.

9. The image forming apparatus as defined in claim 8, wherein the plurality of tube sections includes a flexible tube.

10. The image forming apparatus as defined in claim 8, wherein the toner transporting mechanism includes a screw pump including an elastic stator internally having spiral grooves in a two-screw shape and a rotor rotating inside the stator to transport the toner in an axis direction, and the toner is transported to the developing means by an action of a negative pressure generated by the screw pump.

11. The image forming apparatus as defined in claim 8, wherein the storing means is movable between the normal position and the exchange position by a rotational movement.

12. The image forming apparatus as defined in claim 9, further comprising a rotation shaft positioned to pivot the storing means between the normal position and exchange position, wherein the flexible tube is arranged in close proximity to the rotation shaft.

13. The image forming apparatus as defined in claim 8, further comprising a rotation shaft positioned to pivot the storing means between the normal position and exchange position, wherein the plurality of tube sections includes at least two tube sections joined with a connector positioned in close proximity to the rotation shaft.

14. The image forming apparatus as defined in claim 13, wherein the at least two tube sections of the plurality of tube sections include at least one tube section comprising a flexible material.

15. An image forming method, comprising the steps of:

providing a toner transportation mechanism configured to transport toner from a detachable toner storage to a development mechanism, the toner transportation mechanism including a tube device connected to the detachable toner storage for transporting the toner, the tube device comprising a plurality of tube sections; and

transporting the toner with the toner transportation mechanism from the detachable toner storage to the development mechanism,

wherein the detachable toner storage is movable together with at least one of the plurality of tube sections between a normal position in which the detachable toner storage containing toner is stowed inside the apparatus and an exchange position in which the detachable toner storage is moved at least partially out of the apparatus for exchange with a new detachable toner storage.

16. The image forming method as defined in claim 15, wherein the plurality of tube sections includes a flexible tube.

17. The image forming method as defined in claim 15, wherein the toner transportation mechanism includes a screw pump including an elastic stator internally having spiral grooves in a two-screw shape and a rotor rotating inside the stator to transport the toner in an axis direction, and the toner is transported to the development mechanism by an action of a negative pressure generated by the screw pump.

18. The image forming method as defined in claim 15, wherein the detachable toner storage is movable between the normal position and the exchange position by a rotational movement.

19. The image forming method as defined in claim 16, wherein the detachable toner storage comprises a rotation shaft positioned to pivot the toner storage between the normal position and exchange position, and the flexible tube is arranged in close proximity to the rotation shaft of the detachable toner storage.

20. The image forming method as defined in claim 15, wherein the detachable toner storage comprises a rotation shaft positioned to pivot the toner storage between the normal position and exchange position, and the plurality of tube sections includes at least two tube sections joined with a connector positioned in close proximity to the rotation shaft of the detachable toner storage.

21. The image forming method as defined in claim 20, wherein the at least two tube sections of the plurality of tube sections include at least one tube section comprising a flexible material.