# Patent

## Title
Developing apparatus having a spacer and a leakage preventer

## Abstract

A developing apparatus includes an organic photo conductor, an OPC frame part to support the organic photo conductor, a developing roller to develop a latent image formed on the organic photo conductor by supplying a developer, a developing roller frame part to support the developing roller, a developer storing part to store the developer and provided with a supplying opening through which the developer is supplied to the developing roller, a spacer removably interposed between the OPC frame part and the developing roller frame part and spacing the OPC frame part from the developing roller frame part such that the organic photo conductor and the developing roller do not contact each other, a leakage preventer removably attached to and sealing the supplying opening, and a connecting part to connect the spacer with the leakage preventer. Thus, the spacer and the leakage preventer are capable of being removed simultaneously.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of prior application Ser. No. 11/234,085, filed Sep. 26, 2005 now U.S. Pat. No. 7,822,357, in the U.S. Patent and Trademark Office, which claims the benefit under 35 U.S.C. §119 of Korean Patent Application No. 2004-105557, filed on Dec. 14, 2004, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein in their entirety by reference.


BACKGROUND OF THE INVENTION
1. Field of the Invention
The present general inventive concept relates to a developing apparatus, and more particularly, to a developing apparatus allowing a spacer and a leakage preventer to be simultaneously removed therefrom.
2. Description of the Related Art
A developing apparatus, comprising an organic photo conductor and a developing part, is detachably mounted on a main assembly of an electrophotographic image forming device. The developing apparatus, one of principle apparatuses that configure the electrophotographic image forming device, is employed to visualize image information loaded from the main assembly of the electrophotographic image forming device by a developer.
The electrophotographic image forming device may comprise a printer, a photocopier, a facsimile, a multi-function device, etc.
The developing apparatus is an expendable apparatus removed from the main assembly of the electrophotographic image forming device in accordance with exhaustion of the developer stored therein. When the developer is exhausted, a user removes the existing developing apparatus from the main assembly of the electrophotographic image forming device, and mounts a new developing apparatus thereon.
FIG. 1 is a sectional view schematically illustrating a conventional developing apparatus. As shown in FIG. 1, the developing apparatus comprises an organic photo conductor (OPC) 12 and a developing roller 22. The organic photo conductor 12 receives light information from a laser scanning unit (LSU), not shown, and forms a latent image on a surface thereof. The developing roller 22 supplies the latent image, formed on the organic photo conductor 12, with a developer D, thereby creating a developed image.
A developer storing part 24 stores the developer D, and comprises a supplying opening 25. The developer D is supplied through the supplying opening 25 and then to the developing roller 22 by a supplying roller 26.
The supplying opening 25 is provided with a leakage preventer 40 removably attached thereto. The leakage preventer 40 seals the supplying opening 25, thereby preventing the developer D from leaking out of the developer storing part 24 until the conventional developing apparatus is mounted on the main assembly of the electrophotographic image forming device.
Meanwhile, a user should remove the leakage preventer 40 from the supplying opening 25 before the conventional developing apparatus is mounted on the main assembly of the electrophotographic image forming device. Accordingly the developer D may be supplied to the supplying roller 26 through the supplying opening 25.
An OPC frame part 10 supports the organic photo conductor 12, and a developing roller frame part 20 supports the developing roller 22. Generally, the OPC frame part 10 is rotatably combined with the developing roller frame part 20 by a hinge part 14.
In the state in which the conventional developing apparatus is mounted on the main assembly of the electrophotographic image forming device, and thereby operated, the OPC frame part 10 and the developing roller frame part 20 support the organic photo conductor 12 and the developing roller 22, respectively, according to a control of the main assembly of the electrophotographic image forming device so that the organic photo conductor 12 and the developing roller 22 may be located with a predetermined distance therebetween for the developing process.
SUMMARY OF THE INVENTION
Accordingly, the present general inventive concept provides a developing apparatus having a spacer and a leakage preventer capable of being removed therefrom simultaneously.
Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present general inventive concept.
The foregoing and/or other aspects and advantages of the present general inventive concept are achieved by providing a developing apparatus comprising an organic photo conductor, an OPC frame part to support the organic photo conductor, a developing roller to develop a latent image formed on the organic photo conductor by supplying a developer, a developing roller frame part to support the developing roller, and a developer storing part to store the developer and provided with a supplying opening through which the developer is supplied to the developing roller, the developing apparatus further comprising a spacer removably interposed between the OPC frame part and the developing roller frame part, and spacing the OPC frame part apart from the developing roller frame part such that the organic photo conductor and the developing roller do not contact each other, a leakage preventer removably attached to and sealing the supplying opening, and a connecting part to connect the spacer with the leakage preventer.
The connecting part may comprise a flexible material.
The spacer, the leakage preventer, and the connecting part may be integrally formed.
The foregoing and/or other aspects and advantages of the present general inventive concept are also achieved by providing a developing apparatus mountable within an electrophotographic printing device, comprising an organic photo conductor (OPC) frame unit, a developing roller frame unit connected to the OPC frame unit and having a portion thereof to store a developer therein, and a removable spacing and leakage prevention unit to separate the OPC frame unit and the developing roller frame unit and to seal the portion of the developing roller frame unit to prevent the developer from leaking.
The removable spacing and leakage prevention unit may comprise a spacing portion interposed between the OPC frame unit and the developing roller frame unit, a leakage prevention portion to seal the portion of the developing roller frame unit, and a connector to connect the spacing portion and the leakage prevention portion.
The removable spacing and leakage prevention unit may comprise a protruding portion externally exposed to remove the removable spacing and leakage prevention unit.
The foregoing and/or other aspects and advantages of the present general inventive concept are also achieved by providing a seal and spacer apparatus usable with a developing apparatus having a developing roller frame part having a supply opening and an organic photo conductor (OPC) frame part, the seal and spacer apparatus comprising a removable spacer disposed between the OPC frame part and the developing roller frame part to maintain a space therebetween, a removable leakage preventer disposed to cover the supply opening, and a connecting part attached at a first end to the spacer and at a second end to the leakage preventer to remove the spacer and the leakage preventer simultaneously when a force is applied thereto.



BRIEF DESCRIPTION OF THE DRAWINGS
These and/or other aspects and advantages of the present general inventive concept will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a sectional view schematically illustrating a conventional developing apparatus;
FIG. 2 is a perspective view schematically illustrating a developing apparatus;
FIG. 3 is a perspective view illustrating a developing apparatus according to an embodiment of the present general inventive concept; and
FIG. 4 is a perspective view illustrating a connecting part of the developing apparatus of FIG. 3, and FIG. 5 illustrates a separation between the OPC drum and the developing roller by the spacer in the developing apparatus of FIG. 3.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Reference will now be made in detail to the embodiments of the present general inventive concept, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present general inventive concept while referring to the figures.
Referring to FIG. 2, the leakage preventer 40 is provided with a handle part 45 in an end part thereof, wherein the handle part 45 is exposed externally of the developing apparatus. The user pulls the handle part 45 in the direction of arrow “a” (FIG. 2), thereby removing the leakage preventer 40 from the developing apparatus before mounting the developing apparatus on the main assembly of the electrophotographic image forming device. The leakage preventer 40 can be disposed in a leakage preventer opening that receives the leakage preventer 40 and that is removeably attached to and seals the supplying opening 25 of the developer storing part 24.
The developing apparatus of FIG. 2 comprises a spacer 30 to widen the space between the OPC frame part 10 and the developing roller frame part 20 in the state in which the developing apparatus is not yet mounted on the main assembly of the electrophotographic image forming device. Since a surface of the organic photo conductor 12 is made of a sensitive material, even the slightest collision may cause damage thereto. The spacer 30 prevents the organic photo conductor 12 and the developing roller 22 from contacting each other until the developing apparatus is mounted on the main assembly of the electrophotographic image forming device. The spacer 30 is interposed between the OPC frame part 10 and the developing roller frame part 20, and makes a sufficient space therebetween so that the organic photo conductor 12 and the developing roller 22 do not contact each other. The spacer 30 may be inserted and/or removed from an insertion opening that is defined by at least a portion of the OPC frame part 10 and at least a portion of the developing roller frame part 20. As illustrated in FIG. 2, the insertion opening can include a first insertion opening and a second insertion opening located at opposite sides of the developing apparatus.
The spacer 30 can be removed from the developing apparatus before the developing apparatus is mounted on the main assembly of the electrophotographic image forming device, or after the mounting of the developing apparatus. The user pulls the spacer 30 in the direction of arrow “b” (FIG. 2), thereby removing the spacer 30 from the developing apparatus.
The user should remove both the spacer 30 and the leakage preventer 40 from the developing apparatus before using the developing apparatus.
Further, when the spacer 30 and the leakage preventer 40 are removed from the developing apparatus, the developing apparatus may be mounted on the main assembly of the electrophotographic image forming device such that it may be used.
FIGS. 3 and 4 illustrate a developing apparatus according to an embodiment of the present general inventive concept. Referring to FIGS. 3 and 4, the developing apparatus comprises an OPC frame part 100 to support an organic photo conductor (OPC) (not shown), and a developing roller frame part 200 to support a developing roller (not shown). The OPC frame part 100 is rotatably connected with the developing roller frame part 200 by a hinge part 150.
The developing apparatus further comprises a developer storing part (not shown) to store a developer, and provided with a supplying opening (not shown) through which the developer is supplied to the developing roller (not shown).
A spacer 300 is removably interposed between the OPC frame part 100 and the developing roller frame part 200, and widens a space therebetween such that the organic photo conductor (not shown) does not contact the developing roller (not shown). The lack of contact between the organic photoconductor 12 and the developing roller 22 due to interposing the spacer therebetween is illustrated in FIG. 5.
The spacer 300, in a state in which the developing apparatus is not yet mounted on a main assembly of an electrophotographic image forming device, such as an electrophotographic printing device, prevents the organic photo conductor (not shown) from contacting the developing roller (not shown), thereby precluding damage to a surface of the organic photo conductor. In order to use the developing apparatus, the spacer 300 should be removed from the developing apparatus before the developing apparatus is mounted on the main assembly of the electrophotographic image forming device.
The spacer 300 is formed to be visible and exposed externally of the developing apparatus such that a user can recognize the spacer 300 and remove the spacer 300.
The spacer 300 may be interposed anywhere between the OPC frame part 100 and the developing roller frame part 200, as long as it creates a gap between the organic photo conductor (not shown) and the developing roller (not shown). Further, besides a hook shape, as shown in FIGS. 3 and 4, the spacer 300 may be formed in any shape as long as it separates the OPC frame part 100 and the developing roller frame part 200.
A leakage preventer 400 is removably attached to the supplying opening (not shown). The leakage preventer 400 seals the supplying opening, thereby preventing the developer from leaking out of the developer storing part (not shown).
The leakage preventer 400, in the state in which the developing apparatus is not yet mounted on the main assembly of the electrophotographic image forming device, prevents the developer from leaking out of the developer storing part (not shown). The leakage preventer 400 should be removed from the supplying opening (not shown) before the developing apparatus is mounted on the main assembly of the electrophotographic image forming device for use. When the leakage preventer 400 is removed from the developing apparatus, the developer may be supplied to the developing roller (not shown) through the supplying opening (not shown).
The leakage preventer 400 is provided to be visible and exposed externally of the developing apparatus such that a user can recognize the leakage preventer 400 and remove the leakage preventer 400 when the developing apparatus is mounted on the main assembly of the electrophotographic image forming device.
A connecting part 500 connects the spacer 300 with the leakage preventer 400. The connecting part 500 may be made of a flexible material. The spacer 300, the leakage preventer 400, and the connecting part 500 can be integrally formed.
The connecting part 500 is formed of a material strong enough that the user may remove both the spacer 300 and leakage preventer 400 from the developing apparatus by pulling either one of the spacer 300 and the leakage preventer 400.
Further, the connecting part 500 is provided to be visible and exposed externally of the developing apparatus such that a user can recognize the connecting part 500 and use the connecting part 500 to remove the spacer 300 and the leakage preventer 400 simultaneously, before the developing apparatus is mounted on the main assembly of the electrophotographic image forming device.
The user may remove both the spacer 300 and the leakage preventer 400 from the developing apparatus without difficulty by pulling the connecting part 500. The connecting part 500 may also be employed to hold the developing apparatus. The connecting part 500 may be provided as a handle.
At least one of the spacer 300, the leakage preventer 400, and the connecting part 500 may comprise a stopper to prevent the user from mounting the developing apparatus on the main assembly of the electrophotographic image forming device without removing the spacer 300 and the leakage preventer 400 from the developing apparatus. The stopper may be formed in any position where the developing apparatus contacts the main assembly of the electrophotographic image forming device when being mounted thereon. The stopper may be formed in any shape as long as the user can recognize that the developing apparatus is mounted incorrectly when mounting the developing apparatus on the main assembly of the electrophotographic image forming device without removing the spacer 300 and the leakage preventer 400.
The spacer 300, as illustrated in FIGS. 3 and 4, is exposed externally to be accessible, but the spacer 300 may not be exposed externally, as long as the spacer 300 is interposed between the OPC frame part 100 and the developing roller frame part 200 and creates a distance therebetween such that the OPC does not contact the developing roller. The user may remove the spacer 300 indirectly by pulling either the connecting part 500 or the leakage preventer 400 that is connected thereto as an alternative to removing the spacer 300 directly.
The OPC frame part 100, as illustrated in FIG. 3, is rotatably coupled with the developing roller frame part 200 by the hinge part 150, but the present general inventive concept is not limited there. The OPC frame part 100 may be coupled with the developing roller frame part 200 in a different manner, such as, for example, fixedly coupled therewith, etc. Any type of the connection is sufficient as long as the spacer 300 creates a distance between the OPC frame part 100 and the developing roller frame part 200 so as to separate the organic photo conductor and the developing roller.
An electrophotographic image forming device to which the developing apparatus, according to the present general inventive concept, applies may comprise a printer, a photocopier, a facsimile, a multi-function device, etc. The developing apparatus according to the present general inventive concept may apply to both a wet type electrophotographic image forming device for which the developer is liquid and a dry type electrophotographic image forming device for which the developer is powdery.
Further, the developing apparatus according to the present general inventive concept may apply to both a contact type electrophotographic image forming device in which an organic photo conductor and a developing roller contact each other during a developing process and a non-contact type electrophotographic image forming device in which an organic photo conductor and a developing roller are separated by a predetermined distance during a developing process.
Furthermore, the developing apparatus according to the present general inventive concept, may apply to both a black and white electrophotographic image forming device and a color electrophotographic image forming device.
Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.

## Claims

1. A developing apparatus comprising:
a photoconductor;
a photoconductor frame part to support the photoconductor;
a developing roller to develop a latent image formed on the photoconductor by supplying a developer;
a developing roller frame part to support the developing roller, the developing roller frame part including a developer storing part to store the developer and provided with a supplying opening through which the developer is supplied to the developing roller, wherein the developing roller frame part is rotatably coupled to the photoconductor frame part via a hinge part, the developing roller frame part including a developing roller opening through which a portion of the developing roller is exposed to the photoconductor;
a leakage preventer removably attached to and sealing the supplying opening;
an insertion opening defined by a portion of the photoconductor frame part and a portion of the developing roller frame part;
a frame insertion member removably inserted in the insertion opening to maintain the photoconductor and the developing roller in a non-operational separated state before installation in an image forming apparatus, the insertion opening decreases in size from a larger size, when the frame insertion member is inserted in the insertion opening, to a smaller size, when the frame insertion member is removed from the insertion opening; and
a connecting part to connect the frame insertion member with the leakage preventer,
wherein the insertion opening is located nonadjacent to the developing roller opening of the developing roller frame part.

2. The developing apparatus of claim 1, wherein the insertion opening comprises a first insertion opening and a second insertion opening located opposite sides of the developing apparatus.

3. The developing apparatus of claim 1, wherein at least one of the frame insertion member and the leakage preventer serves as a stopper to prevent a user from mounting the developing apparatus in a main assembly of an image forming apparatus without removing the stopper from the developing apparatus.

4. The developing apparatus of claim 1, further comprising:
a leakage preventer opening to receive the leakage preventer that is removably attached to and sealing the supplying opening.

5. The developing apparatus of claim 4, wherein the insertion opening is disposed in a first plane, and the leakage preventer opening is disposed in a second plane.

6. The developing apparatus of claim 1, wherein the frame insertion member is first removed from the insertion opening and the leakage preventer is then removed from the supplying opening after the non-operational separated state is changed to an operational state.

7. A developing apparatus comprising:
a photoconductor;
a photoconductor frame part to support the photoconductor;
a developing roller to develop a latent image formed on the photoconductor by supplying a developer;
a developing roller frame part to support the developing roller, the developing roller frame part including a developer storing part to store the developer and provided with a supplying opening through which the developer is supplied to the developing roller, wherein the developing roller frame part is rotatably coupled to the photoconductor frame part via a hinge part;
a leakage preventer removably attached to and sealing the supplying opening;
an insertion opening defined by a portion of the photoconductor frame part and a portion of the developing roller frame part; and
a frame insertion member removably inserted in the insertion opening to maintain the photoconductor and the developing roller in a non-operational separated state before installation in an image forming apparatus,
wherein the insertion opening for accommodating a complete insertion of the frame insertion member is formed only when the photoconductor and the developing roller are in the non-operational separated state,
wherein the insertion opening is located nonadjacent to the developing roller and the photoconductor.

8. The developing apparatus of claim 7, wherein the insertion opening decreases in size from a larger size, when the frame insertion member is inserted in the insertion opening, to a smaller size, when the frame insertion member is removed from the insertion opening.

9. The developing apparatus of claim 7, further comprising:
a connecting part to connect the frame insertion member with the leakage preventer.

10. The developing apparatus of claim 9, wherein the frame insertion member is first removed from the insertion opening and the leakage preventer is then removed from the supplying opening after the non-operational separated state is changed to an operational state.

11. The developing apparatus of claim 7, wherein the insertion opening comprises a first insertion opening and a second insertion opening located opposite sides of the developing apparatus.