Charging device module for use with print cartridge

• US 5,890,035 A
• Filed: 11/14/1997
• Issued: 03/30/1999
• Est. Priority Date: 11/14/1997
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Bryant, Jerry W., Damji, Dhirendra C., Kumar, Ajay, Chiesa, Daniel A.
• Primary Examiner(s): Smith, Matthew S.
• Application Number:
  US08/970,842
• Time in Patent Office: 501 Days
• Field of Search: 399/170-173, 399/110, 399/111, 399/113, 399/115, 250/324-326, 361/225, 361/229
• US Class Current: 399/115
• CPC Class Codes: G03G 15/0291 corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
• CPC Class Codes: G03G 21/1814 Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing G03G21/1835 takes precedence
• CPC Class Codes: G03G 21/1821 means for connecting the different parts of the process cartridge, e.g. attachment, positioning of parts with each other, pressure/distance regulation G03G21/1825 takes precedence
• CPC Class Codes: G03G 2221/1693 for charging

Abstract

A charging module for applying a uniform electrostatic charge to a charge retentive surface is provided. The charging module is operably electrically connectable to a power supply for supplying an electrical bias to the charging apparatus. The charging module is mountable into a process cartridge. The process cartridge includes a cartridge mounting surface for cooperation with the charging apparatus. The apparatus includes a housing including a housing mounting feature and an electrode. The electrode is mounted to the housing and is positioned adjacent the surface in a non-contact relationship therewith. The housing mounting feature is adapted to be cooperable with the cartridge mounting surface to secure the placement of the charging module into the cartridge without the need for any installation tools.

Claims

1. A charging module for applying a uniform electrostatic charge to a charge retentive surface, said charging module operably electrically connectable to a power supply for supplying an electrical bias to said charging module, said charging module mountable into a process cartridge, the process cartridge including a first cartridge mounting surface and a second cartridge mounting surface spaced from said first cartridge mounting surface for cooperation with the charging module, said module comprising:

a housing including a first housing mounting feature and a second housing mounting feature spaced from said first housing mounting feature, said first housing mounting feature for cooperation with the first cartridge mounting surface and said second housing mounting feature for cooperation with the second cartridge mounting surface; and

an electrode mounted to said housing and positioned adjacent said surface in a non-contact relationship therewith, said housing mounting features adapted to be cooperable with the cartridge mounting surfaces to secure the placement of the charging module into the cartridge without the need for any installation tools, said second housing mounting feature being engagable with the second cartridge mounting surface after said first housing mounting feature is engaged with the first cartridge mounting surface by pivoting said housing with respect to the process cartridge.

2. A charging module according to claim 1 further comprising an electrical connector, electrically connected to said electrode and electrically connectable to the power supply for providing an electrical bias to said electrode, said electrical connector extending from said electrode and integral therewith.

3. A charging module according to claim 2, wherein said electrical connector is engagable with the power supply as said charging module is inserted into the process cartridge.

4. A charging module according to claim 1, wherein said second housing mounting feature and the second cartridge mounting surface are fastened to each other while pivoting said housing with respect to the process cartridge.

5. A charging module according to claim 4:

wherein at least one of said housing and the cartridge is deflected while pivoting said housing with respect to the process cartridge; and

wherein at least one of said housing and the cartridge at least partially returns to an undeflected position when said second housing mounting feature and the second cartridge mounting surface are fastened to each other.

6. A charging module according to claim 1:

wherein said first housing mounting feature comprises a pair of spaced apart protrusions; and

wherein said second housing mounting feature comprises a pair of spaced apart apertures defined by said housing.

7. A charging module according to claim 1, further comprising a shield connected to said housing and at least partially surrounding said electrode.

8. A charging module according to claim 7, wherein said electrode comprises a portion thereof extending from one end thereof, said portion defining an electrode electrical connector.

9. A charging module according to claim 1:

wherein at least one of the first cartridge mounting surface and the second cartridge mounting surface comprises an aperture in said cartridge; and

wherein at least one of the first housing mounting feature and said second housing mounting feature comprises a protrusion matingly fitted to the aperture.

10. A charging module according to claim 1:

wherein at least one of the first cartridge mounting surfaces and the second cartridge mounting surface comprises a protrusion; and

wherein at least one of said first housing mounting feature and said second housing mounting feature comprises an aperture in said housing, said protrusion matingly fitted to the aperture.

11. A process cartridge for use in a printing machine comprising, said process cartridge including a charging module for applying a uniform electrostatic charge to a charge retentive surface, said charging module operably electrically connectable to a power supply for supplying an electrical bias to said charging module, said charging module mountable into the process cartridge, the process cartridge including a first cartridge mounting surface and a second cartridge mounting surface spaced from the first cartridge mounting surface for cooperation with the charging module, said charging module comprising:

a housing including a first housing mounting feature and a second housing mounting feature spaced from said first housing mounting feature, said first housing mounting feature for cooperation with the first cartridge mounting surface and said second housing mounting feature for cooperation with the second cartridge mounting surface; and

an electrode mounted to said housing and positioned adjacent said surface in a non-contact relationship therewith, said housing mounting features adapted to be cooperable with the cartridge mounting surfaces to secure the placement of the charging module into the cartridge without the need for any installation tools, said second housing mounting feature being engagable with the second cartridge mounting surface after said first housing mounting feature is engaged with the first cartridge mounting surface by pivoting said housing with respect to the process cartridge.

12. A process cartridge according to claim 11 further comprising an electrical connector, electrically connected to said electrode and electrically connectable to the power supply for providing an electrical bias to said electrode, said electrical connector extending from said electrode and integral therewith.

13. A process cartridge according to claim 12, wherein said electrical connector is engagable with the power supply as said charging module is inserted into the process cartridge.

14. A process cartridge according to claim 11, wherein said second housing mounting feature and the second cartridge mounting surface are fastened to each other while pivoting said housing with respect to the process cartridge.

15. A process cartridge according to claim 14:

wherein at least one of said housing and the cartridge is deflected while pivoting said housing with respect to the process cartridge; and

wherein at least one of said housing and the cartridge at least partially returns to an undeflected position when said second housing mounting feature and the second cartridge mounting surface are fastened to each other.

16. A process cartridge according to claim 11:

wherein said first housing mounting feature comprises a pair of spaced apart protrusions; and

wherein said second housing mounting feature comprises a pair of spaced apart apertures defined by said housing.

17. A process cartridge according to claim 11, further comprising a shield connected to said housing and at least partially surrounding said electrode.

18. A process cartridge according to claim 17, wherein said electrode comprises a portion thereof extending from one end thereof, said portion defining an electrode electrical connector.

19. A process cartridge according to claim 11:

wherein at least one of the first cartridge mounting surface and the second cartridge mounting surface comprises an aperture in said cartridge; and

wherein at least one of the first housing mounting feature and said second housing mounting feature comprises a protrusion matingly fitted to the aperture.

20. A process cartridge according to claim 11:

wherein at least one of the first cartridge mounting surfaces and the second cartridge mounting surface comprises a protrusion; and

wherein at least one of said first housing mounting feature and said second housing mounting feature comprises an aperture in said housing, said protrusion matingly fitted to the aperture.

21. An electrophotographic printing machine of the type including a process cartridge having a charging module for applying a uniform electrostatic charge to a charge retentive surface, said charging module operably electrically connectable to a power supply for supplying an electrical bias to said charging module, said charging module mountable into the process cartridge, the process cartridge including a first cartridge mounting surface and a second cartridge mounting surface spaced from the first cartridge mounting surface for cooperation with the charging module, said charging module comprising:

a housing including a first housing mounting feature and a second housing mounting feature spaced from said first housing mounting feature, said first housing mounting feature for cooperation with the first cartridge mounting surface and said second housing mounting feature for cooperation with the second cartridge mounting surface; and

an electrode mounted to said housing and positioned adjacent said surface in a non-contact relationship therewith, said housing mounting features adapted to be cooperable with the cartridge mounting surfaces to secure the placement of the charging module into the cartridge without the need for any installation tools, said second housing mounting feature being engagable with the second cartridge mounting surface after said first housing mounting feature is engaged with the first cartridge mounting surface by pivoting said housing with respect to the process cartridge.

22. A printing machine according to claim 21 further comprising an electrical connector, electrically connected to said electrode and electrically connectable to the power supply for providing an electrical bias to said electrode, said electrical connector extending from said electrode and integral therewith.

23. A printing machine according to claim 22, wherein said electrical connector is engagable with the power supply as said charging module is inserted into the process cartridge.

24. A printing machine according to claim 21, wherein said second housing mounting feature and the second cartridge mounting surface are fastened to each other while pivoting said housing with respect to the process cartridge.

25. A printing machine according to claim 24:

wherein at least one of said housing and the cartridge is deflected while pivoting said housing with respect to the process cartridge; and

wherein at least one of said housing and the cartridge at least partially returns to an undeflected position when said second housing mounting feature and the second cartridge mounting surface are fastened to each other.

26. A printing machine according to claim 21:

wherein said first housing mounting feature comprises a pair of spaced apart protrusions; and

wherein said second housing mounting feature comprises a pair of spaced apart apertures defined by said housing.

27. A printing machine according to claim 21, further comprising a shield connected to said housing and at least partially surrounding said electrode.

28. A printing machine according to claim 27, wherein said electrode comprises a portion thereof extending from one end thereof, said portion defining an electrode electrical connector.

29. A printing machine according to claim 21:

wherein at least one of the first cartridge mounting surface and the second cartridge mounting surface comprises an aperture in said cartridge; and

wherein at least one of the first housing mounting feature and said second housing mounting feature comprises a protrusion matingly fitted to the aperture.

30. A printing machine according to claim 21:

wherein said at least one of the first cartridge mounting surfaces and the second cartridge mounting surface comprises a protrusion; and

wherein at least one of said first housing mounting feature and said second housing mounting feature comprises an aperture in said housing, said protrusion matingly fitted to the aperture.