Electrophotography – Having particular structure – Remanufacturing
Reexamination Certificate
2000-10-26
2002-05-28
Chen, Sophia S. (Department: 2852)
Electrophotography
Having particular structure
Remanufacturing
C399S103000
Reexamination Certificate
active
06397025
ABSTRACT:
FIELD OF THE INVENTION AND RELATED ART
The present invention relates to a remanufacturing method for a process cartridge.
Here, the process cartridge is a cartridge containing at least a developing roller as developing means and an electrophotographic photosensitive member as a unit, the cartridge being detachably mountable to a main assembly of an electrophotographic image forming apparatus.
The electrophotographic image forming apparatus is an apparatus in which an image is formed on a recording material (recording paper, textile or the like) using an electrophotographic image forming process, and includes an electrophotographic copying machine, an electrophotographic printer (a LED printer, a laser beam printer and so on), an electrophotographic printer-type facsimile machine, an electrophotographic word processor, and the like.
In an electrophotographic image forming apparatus using an electrophotographic image forming process, a process cartridge is used, which integrally contains an electrophotographic photosensitive member and process means actable on the electrophotographic photosensitive member, the process cartridge being detachably mountable to the main assembly of the electrophotographic image forming apparatus. With this process cartridge type, the maintenance of the apparatus can be carried out in effect without service people. Therefore, the process cartridge type is widely used in the field of electrophotographic image forming apparatus.
Such a process cartridge forms an image on recording material with toner. Therefore, the toner is consumed in accordance with image forming operations. When the toner is consumed up to such an extent that the user is not satisfied with the image quality, the commercial value of the process cartridge is lost.
It is desired that such a used process cartridge be given commercial value again by remanufacturing the process cartridge through an easy method.
SUMMARY OF THE INVENTION
Accordingly, it is a principal object of the present invention to provide a remanufacturing method of a process cartridge.
It is another object of the present invention to provide a remanufacturing method of a process cartridge in which when the process cartridge is transported, the toner is prevented from leaking out.
It is a further object of the present invention to provide a remanufacturing method of a process cartridge wherein the process cartridge in which the toner is consumed to such an extent that the user is not satisfied with the image quality is recycled to be given a commercial value.
According to an aspect of the present invention, there is provided a remanufacturing method of remanufacturing a process cartridge comprising:
(a) a step of preparing a used process cartridge which comprises a toner developing container, a cleaning container and pins for coupling the toner developing container and the cleaning container at opposite longitudinal ends of the process cartridge,
the toner developing container including a toner accommodating portion, a toner supply opening, a developing roller, and a developing blade, the toner developing container being provided adjacent the opposite ends with a cut-away portion for passing a laser beam for measuring a gap between the photosensitive drum and the developing roller;
the cleaning container including an electrophotographic photosensitive drum;
(b) a container separating step of separating the process cartridge into the toner developing container and the developing container by disengaging the pins from the process cartridge;
(c) a developing roller dismounting step of dismounting the developing roller from the toner developing container separated by the container separating step;
(d) a developing blade dismounting step of dismounting the developing blade from the toner developing container separated by the container separating step;
(e) a cut-away portion sealing step of sealing with a seal the cut-away portion of the toner developer container;
(f) a developing blade mounting step of mounting the developing blade on the toner developer container having the cut-away portion sealed with the seal mounted thereto;
(g) a developing roller mounting step of mounting the developing roller on the toner developer container having the cut-away portion sealed with the seal mounted thereto;
(h) a toner refilling step of refilling the toner into the toner accommodating portion of the toner developing container having the seal, the developing blade and the developing roller; and
(i) a container coupling step of coupling the toner developing container having the seal, the developing blade and the developing roller with the cleaning container by engaging the pin into them.
According to another aspect of the present invention, there is provided a remanufacturing method of remanufacting a process cartridge comprising:
(a) a step of preparing a used process cartridge which comprises a toner developing container, a cleaning container and pins for coupling the toner developing container and the cleaning container at opposite longitudinal ends of the process cartridge,
the toner developing container including a toner accommodating portion, a toner supply opening, a developing roller and a developing blade, the toner developing container being provided adjacent the opposite ends with a cut-away portion for passing a laser beam for measureing a gap between the photosensitive drum and the developing roller;
the cleaning container including an electrophotographic photosensitive drum;
(b) a container separating step of separating the process cartridge into the toner developing container and the developing container by disengaging the pins from the process cartridge:
(c) a developing roller dismounting step of dismounting the developing roller from said toner developing container separated by the container separating step;
(d) a developing blade dismounting step of dismounting the developing blade from the toner developing container separated by the container separating step;
(e) a cut-away portion sealing step of sealing with a seal the cut-away portion of the toner developer container;
(f) a flexible sheet mounting step of mounting a flexible sheet to the toner developing container having the cut-away portion so as to extend along the longitudinal direction of the developing roller when the developing roller is mounted to the toner developing container;
(g) first and second side seal mounting steps of mounting a first side seal continuously on a longitudinal end of the flexible sheet mounted on the toner developing container having the cut-away portion and the toner developing container having the cut-away portion, and mounting a second side seal continuously on the other longitudinal end of the flexible sheet and the toner developing container having the cut-away portion;
(h) a developing blade mounting step of mounting the developing blade on the toner developer container having the cut-away portion sealed with the seal mounted thereto;
(i) a developing roller mounting step of mounting the developing roller on the toner developer container having the cut-away portion sealed with the seal mounted thereto;
(j) a toner refilling step of refilling the toner into the toner accommodating portion of the toner developing container having the seal, the developing blade and the developing roller; and
(k) a container coupling step of coupling the toner developing container having the seal, the developing blade and the developing roller with the cleaning container by engaging the pin into them.
According to a further aspect of the present invention, there is provided a remanufacturing method of remanufacting a process cartridge comprising:
(a) a step of preparing a used process cartridge which comprises a toner developing container, a cleaning container and pins for coupling the toner developing container and the cleaning container at opposite longitudinal ends of said process cartridge,
the toner developing container including a toner accommodating portion, a toner supply opening, a developing roller and a developing blade, the toner deve
Higeta Akira
Kakumi Yoshiyuki
Canon Kabushiki Kaisha
Chen Sophia S.
Fitzpatrick ,Cella, Harper & Scinto
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