US 6,970,668 B2Granted

Method of reproducing process cartridge

AssigneeCanon Kabushiki Kaisha

InventorsTakahito Ueno, Atsushi Numagami, Akiyoshi Fujita

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Abstract

A method of refurbishing a process cartridge includes removing first and second side plates, a charging unit removing step, a drum removing step, a drum attaching step, a charging unit attaching step, and a positioning step of attaching the first and second side plates to the development unit, to which the drum and the charging unit are attached, positioning the development and charging units by the first side plate as well as movably supporting the drum in a direction perpendicular to the lengthwise direction, and positioning the development and charging units and the drum by the second side plate. Another reproducing method includes opening an open/close shutter of a developing agent replenishing port, evacuating the developing agent in the development unit from the development agent replenishing port, filling a new developing agent from the developing agent replenishing port, and closing the open/close shutter.

Claims14

Dependent claims

A method of refurbishing a process cartridge that is detachably attachable to a body of an electrophotographic image forming apparatus and comprises an electrophotographic photosensitive drum, a charging unit configured and positioned to charge the electrophotographic photosensitive drum, and a development unit configured and positioned to develop a latent image formed on the electrophotographic photosensitive drum using a development roller, wherein the electrophotographic photosensitive drum and the charging unit are attached to the development unit, said method comprising:

(a) a side plate removing step of removing first and second side plates disposed at both the lengthwise ends of the process cartridge;
(b) a charging unit detaching step of detaching the charging unit from the development unit;
(c) an electrophotographic photosensitive drum removing step of removing the electrophotographic photosensitive drum from the development unit;
(d) a shaft extracting step of extracting a shaft from the electrophotographic photosensitive drum;
(e) a shaft inserting step of inserting a shaft into a new electrophotographic photosensitive drum;
(f) an electrophotographic photosensitive drum attaching step of attaching the new electrophotographic photosensitive drum to the development unit;
(g) a charging unit attaching step of attaching the charging unit to the development unit to which the new electrophotographic photosensitive drum is attached;
and
(h) a positioning step of attaching the first and second side plates to the development unit to which the new electrophotographic photosensitive drum and the charging unit are attached, positioning the development unit and the charging unit with the first side plate as well as supporting the electrophotographic photosensitive drum movably in a direction perpendicular to the lengthwise direction of the process cartridge, and positioning the development unit, the charging unit and the electrophotographic photosensitive drum with the second side plate.

6 more elements

(a) a side plate removing step of removing first and second side plates disposed at both lengthwise ends of the process cartridge;
(b) a charging unit detaching step of detaching the charging unit from the development unit;
(c) an electrophotographic photosensitive drum removing step of removing the electrophotographic photosensitive drum from the development unit;
(d) an electrophotographic photosensitive drum attaching step of attaching a new electrophotographic photosensitive drum to the development unit;
(e) a charging unit attaching step of attaching the charging unit to the development unit to which the new electrophotographic photosensitive drum is attached;
and
(f) a positioning step of attaching the first and second side plates to the development unit to which the new electrophotographic photosensitive drum and the charging unit are attached, positioning the development unit and the charging unit with the first side plate as well as supporting the new electrophotographic photosensitive drum movably in a direction perpendicular to the lengthwise direction of the process cartridge, and positioning the development unit, the charging unit and the electrophotographic photosensitive drum with the second side plate.

4 more elements

(a) a side plate removing step of removing first and second side plates disposed at both lengthwise ends of the process cartridge;
(b) a charging unit detaching step of detaching the charging unit from the development unit;
(c) an electrophotographic photosensitive drum removing step of removing the electrophotographic photosensitive drum from the development unit;
(d) a cover member removing step of removing a cover member from the development unit, the cover member being configured and positioned to cover the surface of the development roller except for the portion thereof facing the electrophotographic photosensitive drum and to hold a sheet member in contact with the electrophotographic photosensitive drum in the lengthwise direction thereof;
(e) a pin member extracting step of extracting first and second pin members from the development unit, the first and second pin members being configured and positioned to fix bearings that rotatably support the development roller at both ends thereof;
(f) a regulation member removing step of removing a regulation member from the development unit, the regulation member being configured and positioned to regulate the angle in a rotational direction of a magnet roller included in the development roller;
(g) a development roller removing step of removing the development roller from the development unit;
(h) a developing agent evacuating step of evacuating the developing agent in the development unit from the opening of the development unit that appears when the development roller is removed;
(i) a developing agent removing step of removing the developing agent deposited on the development roller;
(j) a developing agent filling step of filling new developing agent into the development unit from the opening of the development unit;
(k) a development roller attaching step of attaching the development roller to the development unit;
(l) a regulation member attaching step of attaching the regulation member to the development unit;
(m) a pin member attaching step of attaching the first and second pin members to the development unit;
(n) a cover member attaching step of attaching the cover member to the development unit;
(o) an electrophotographic photosensitive drum attaching step of attaching the electrophotographic photosensitive drum to the development unit;
(p) a charging unit attaching step of attaching the charging unit to the development unit to which the electrophotographic photosensitive drum is attached in said electrophotographic photosensitive drum attaching step;
and
(q) a positioning step of attaching the first and second side plates to the development unit to which the electrophotographic photosensitive drum and the charging unit are attached in said electrophotographic photosensitive drum and charging unit attaching steps, positioning the development unit and the charging unit by the first side plate as well as supporting the electrophotographic photosensitive drum movably in a direction perpendicular to the lengthwise direction of the process cartridge, and positioning the development unit, the charging unit and the electrophotographic photosensitive drum with the second side plate.

15 more elements

(a) an open/close shutter opening step of opening an open/close shutter of a developing agent replenishing port disposed in the development unit;
(b) a first developing agent evacuating step of evacuating the developing agent in the development unit from the developing agent replenishing port whose open/close shutter is opened;
(c) an open/close shutter closing step of closing the open/close shutter;
(d) a side plate removing step of removing first and second side plates disposed at both lengthwise ends of the process cartridge thereof;
(e) a charging unit detaching step of detaching the charging unit from the development unit;
(f) an electrophotographic photosensitive drum removing step of removing the electrophotographic photosensitive drum from the development unit;
(g) a cover member removing step of removing a cover member from the development unit, the cover member being configured and positioned to cover the surface of the development roller except for the portion thereof facing the electrophotographic photosensitive drum and to hold a sheet member in contact with the electrophotographic photosensitive drum in the lengthwise direction;
(h) a pin member extracting step of extracting first and second pin members for the development unit, the first and second pin members being configured and positioned to fi bearings that rotatably support the development roller at both the ends thereof;
(i) a regulation member removing step of removing a regulation member from the development unit, the regulating member being configured and positioned to regulate the angle in a rotational direction of a magnet roller included in the development roller;
(j) a development roller removing step of removing the development roller from the development unit;
(k) a second developing agent evacuating step of evacuating the developing agent in the development unit from the opening of the development unit that appears when the development roller is removed;
(l) a developing agent removing step of removing the developing agent deposited on the development roller;
(m) a developing agent filling step of filling the development unit with new developing agent from the opening of the development unit;
(n) a development roller attaching step of attaching the development roller to the development unit;
(o) a regulation member attaching step of attaching the regulation member to the development unit;
(p) a pin member attaching step of attaching the first and second pin members to the development unit;
(q) a cover member attaching step of attaching the cover member to the development unit;
(r) an electrophotographic photosensitive drum attaching step of attaching the electrophotographic photosensitive drum to the development unit;
(s) a charging unit attaching step of attaching the charging unit to the development unit to which the electrophotographic photosensitive drum is attached in said electrophotographic photosensitive drum attaching step;
and
(t) a positioning step of attaching the first and second side plates to the development unit to which the electrophotographic photosensitive drum and the charging unit are attached in said charging unit attaching step and in said electrophotographic photosensitive drum attaching step, positioning the development unit and the charging unit with the first side plate as well as supporting the electrophotographic photosensitive drum movably in a direction perpendicular to the lengthwise direction, and positioning the development unit, the charging unit and the electrophotographic photosensitive drum with the second side plate.

18 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/691,546Filed 24 Oct 2003
Priority: JP 2002-31864231 Oct 2002
Published: US 2005/0008391 A113 Jan 2005
Granted: 29 Nov 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G03G 21/1832
Prevention of damage or soiling, e.g. mechanical abrasion: shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering
G03G 2215/00987
Apparatus for electrophotographic processes: remanufacturing, i.e. reusing or recycling parts of the image forming apparatus
G03G
Electrography