Patent US4845523A successfully refreshed from Google Patents.
US4845523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A developing device for an electrophotographic copying machine
Assignee: Sharp Corp
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Filing: 1987-09-10
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Granted: 1989-07-04
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Expires: 2007-09-10
Abstract
Abstract An electrophotographic copying machine including a unit consisting of a photoreceptor and a developing device. The unit can be pulled out of or into the copying machine. The developing device has a developer outlet provided at its bottom, and first and second grooves. A developer funnel can be coupled to the first groove to receive the old developer from the developing device. The first groove is also provided for guiding a lid closing the developer outlet. The funnel can also be coupled to the second groove to supply the new developer. In a specific form, the developing device can be shifted from a position close to the photoreceptor to a position separate from the same. The developing device can also be moved with a quadric link chain pivotally supported on the frame of the unit of the photoreceptor and the developing device. Positioning members are provided in the frame for positioning the developing device in both positions.
Inventors
- 👤 Takashi Miyaji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:07
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/1814; G03G15/00; G03G15/06; G03G15/08; G03G15/0822; G03G15/0844; G03G21/1642; G03G21/1647; G03G21/1661; G03G21/1676; G03G2221/00; G03G2221/16; G03G2221/163; G03G2221/1651; G03G2221/1654; G03G2221/1678; G03G2221/1684; G03G2221/18; G03G2221/183; G03G2221/1853; G03G2221/1869
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
208 words
An electrophotographic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developing means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united and being connected to a unit frame means, said unit frame means being provided with a first slide so that said unit frame means can be slidably pulled out of or introduced into said electrophotographic copying machine and a second slide so that said developing means can be slidably extended away from and pushed toward said photorecptor means in a direction perpendicular to a sliding direction of said first slide; said developing means including an inlet opening for supplying new developer therethrough into said developing means, an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove; said inlet opening and said outlet opening being independently capable of coupling to funnel means for introducing and removing said developer from a developer container, respectively, said funnel means being slidably inserted into said second groove of said outlet opening.
Claim 2
Dependent Claim
208 words
An electrophotographic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developing means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united and being connected to a unit frame means, said unit frame means being provided with a first slide so that said unit frame means can be slidably pulled out of or introduced into said electrophotographic copying machine and a second slide so that said developing means can be slidably extended away from and pushed toward said photorecptor means in a direction perpendicular to a sliding direction of said first slide; said developing means including an inlet opening for supplying new developer therethrough into said developing means, an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove; said inlet opening and said outlet opening being independently capable of coupling to funnel means for introducing and removing said developer from a developer container, respectively, said funnel means being slidably inserted into said second groove of said outlet opening.
Claim 3
Dependent Claim
38 words
A copying machine as in claim 1, wherein said lid member has an upper flat face that is flush with the surface of the bottom of said developing means when said lid member is in a closed position.
Claim 4
Dependent Claim
23 words
A copying machine as in claim 1, wherein a width of said first groove is different from a width of said second groove.
Claim 5
Dependent Claim
56 words
A copying machine as in claim 1, wherein said developing means is connected to a guide means that is in turn slidably connected to a bar means that is in turn connected to said unit fram means so as to allow said developing means to be slidably moved close to and separated from said photoreceptor means.
Claim 6
Dependent Claim
41 words
A copying machine as in claim 2, wherein said inlet opening is provided with an inlet groove so as to allow said funnel means to be slidably inserted into said inlet groove for coupling said funnel means to said inlet opening.
Claim 7
Dependent Claim
120 words
An electrophotographic copying machine comprising: photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; developing means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united as a unit such that said unit can be pulled out of or inserted into the electrophotographic copying machine; quadric link chain means provided on the frame of the unit for shifting said developing means between a developing position for developing and a separating position of not developing in connection with said photorecptor means; and position means provided on the frame of the unit for fixing said developing means at the developing position and the separating position.
Claim 8
Dependent Claim
120 words
An electrophotographic copying machine comprising: photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; developing means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united as a unit such that said unit can be pulled out of or inserted into the electrophotographic copying machine; quadric link chain means provided on the frame of the unit for shifting said developing means between a developing position for developing and a separating position of not developing in connection with said photorecptor means; and position means provided on the frame of the unit for fixing said developing means at the developing position and the separating position.
Claim 9
Dependent Claim
14 words
The machine of claim 5, wherein said position means comprises a pair of pins.
Claim 10
Dependent Claim
172 words
An electrphotograhic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developIng means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united and connected to a unit frame means, said unit frame means being provided with a slide so that said unit frame means can be slidably pulled out of or introduced into said electrophotographic copying machine; said developing means including an inlet opening for supplying new developer therethrough into said developer means, an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove; said inlet opening and said outlet opening being removably coupled to a funnel for introducing and removing said developer into and from a developer container, respectively, said funnel being slidably inserted into said second groove of said outlet opening.
Claim 11
Dependent Claim
172 words
An electrphotograhic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developIng means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united and connected to a unit frame means, said unit frame means being provided with a slide so that said unit frame means can be slidably pulled out of or introduced into said electrophotographic copying machine; said developing means including an inlet opening for supplying new developer therethrough into said developer means, an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove; said inlet opening and said outlet opening being removably coupled to a funnel for introducing and removing said developer into and from a developer container, respectively, said funnel being slidably inserted into said second groove of said outlet opening.
Claim 12
Dependent Claim
174 words
An electrophotographic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developing means for developing said electrostatic latent image with a developer; said photorecptor and said developing means being integrally united and being connected to a unit frame, said unit frame being provided with a slide so that said unit frame can be slidably pulled out of or introduced into said electrophotographic copying machine; said developing means including an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove and having an upper flat face that is flush with the surface of the bottom of said developing means when said lid member is in a closed position; said outlet opening being capable of coupling to a funnel for removing said developer into a developer container, said funnel being slidably inserted into said second groove.
Claim 13
Dependent Claim
174 words
An electrophotographic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developing means for developing said electrostatic latent image with a developer; said photorecptor and said developing means being integrally united and being connected to a unit frame, said unit frame being provided with a slide so that said unit frame can be slidably pulled out of or introduced into said electrophotographic copying machine; said developing means including an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove and having an upper flat face that is flush with the surface of the bottom of said developing means when said lid member is in a closed position; said outlet opening being capable of coupling to a funnel for removing said developer into a developer container, said funnel being slidably inserted into said second groove.
Claim 14
Dependent Claim
41 words
A copy machine as in claim 9, further including an inlet opening in said developing means for supplying new developer therethrough into said developing means, said inlet opening being capable of being coupled to said funnel for introducing said new developer.
Claim 15
Dependent Claim
39 words
A copying machine as in claim 10, wherein said inlet opening is provided with an inlet groove so as to allow said funnel to be slidably inserted into said inlet groove for coupling said funnel to said inlet opening.
Claim 16
Dependent Claim
23 words
A copying machine as in claim 9, wherein a width of said first groove is different from a width of said second groove.
Claim 17
Dependent Claim
54 words
A copying machine as in claim 9, wherein said developing means is connected to guide means that is in turn slidably connected to a bar means that is in turn connected to said unit frame so as to allow said developimg means to be slidably moved close to and separated from said photoreceptor means.
Claim 18
Dependent Claim
161 words
An electrophotographic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developing means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united and being connected to a unit frame, said unit frame being provided with a slide so that said unit frame can be slidably pulled out of or introduced into said electrophotographic copying machine; said developing means including an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, a width of said first groove being different from a width of said second groove, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove; said outlet opening being capable of coupling to a funnel for removing said developer into a developer container, said funnel being slidably inserted into said second groove.
Claim 19
Dependent Claim
161 words
An electrophotographic copying machine comprising: a photoreceptor on which an electrostatic latent image is formed by receiving a light image from a copy document; and developing means for developing said electrostatic latent image with a developer; said photoreceptor and said developing means being integrally united and being connected to a unit frame, said unit frame being provided with a slide so that said unit frame can be slidably pulled out of or introduced into said electrophotographic copying machine; said developing means including an outlet opening for exhausting said developer therethrough, first and second grooves provided adjacent to said outlet opening, a width of said first groove being different from a width of said second groove, and a lid member for closing said outlet opening, said lid member being slidably inserted into said first groove; said outlet opening being capable of coupling to a funnel for removing said developer into a developer container, said funnel being slidably inserted into said second groove.
Claim 20
Dependent Claim
41 words
A copying machine as in claim 14, further including an inlet opening in said developer means for supplying new developer therethrough into said developing means, said inlet opening being capable of being coupled to said funnel for introducing said new developer.
Claim 21
Dependent Claim
39 words
A copying machine as in claim 15, wherein said inlet opening is provided with an inlet groove so as to allow said funnel to be slidably inserted into said inlet groove for coupling said funnel to said inlet opening.
Claim 22
Dependent Claim
55 words
A copying machine as in claim 14, wherein said developing means is connected to a guide means that is in turn slidably connected to a bar means that is in turn connected to said unit frame so as to allow said developing means to be slidably moved close to and separated from said photorecptor means.
References Cited (Backward Citations)
US3764208A
Cited
US4132476A
Cited
US4237943A
Cited
US4271784A
Cited
JPS5786875A
Cited
JPS5794764A
Cited
US4530588A
Cited
US4542976A
Cited
US4563074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |