公开(公告)号：DE69834438T2

公开(公告)日：2006-12-07

申请号：DE69834438

申请日：1998-05-27

Applicant: SHARP KK

Inventor： KIDO EIICHI ,  WAKADA SHIGEYUKI ,  OHGOSHI TOSHIHIDE ,  OHTSUKA YOSHINORI ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  ISHII HIROSHI ,  YUI YUHI

IPC: G03G15/08

Abstract: It is an object of the present invention to provide a developing apparatus that can protect a developer holder and a layer thickness control member from damages and a developer from scattering in itself, while preventing a surplus supply of the developer to both ends on the peripheral surface of the developer holder. In a developing apparatus (DA2), at the back side of a layer thickness control member (1) is provided a back side elastic sealing member (26) coming in contact with the side edges of a both-end elastic sealing members (2) to seal the developer together with the back side elastic sealing member and the both-end elastic sealing members at both ends. The both-end elastic sealing members (2) seals the developer at both ends of a developer holder (3) of its peripheral surface.

公开(公告)号：DE69834438D1

公开(公告)日：2006-06-08

申请号：DE69834438

申请日：1998-05-27

Applicant: SHARP KK

Inventor： KIDO EIICHI ,  WAKADA SHIGEYUKI ,  OHGOSHI TOSHIHIDE ,  OHTSUKA YOSHINORI ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  ISHII HIROSHI ,  YUI YUHI

IPC: G03G15/08

Abstract: It is an object of the present invention to provide a developing apparatus that can protect a developer holder and a layer thickness control member from damages and a developer from scattering in itself, while preventing a surplus supply of the developer to both ends on the peripheral surface of the developer holder. In a developing apparatus (DA2), at the back side of a layer thickness control member (1) is provided a back side elastic sealing member (26) coming in contact with the side edges of a both-end elastic sealing members (2) to seal the developer together with the back side elastic sealing member and the both-end elastic sealing members at both ends. The both-end elastic sealing members (2) seals the developer at both ends of a developer holder (3) of its peripheral surface.

公开(公告)号：DE69816523D1

公开(公告)日：2003-08-28

申请号：DE69816523

申请日：1998-05-27

Applicant: SHARP KK

Inventor： KIDO EIICHI ,  WAKADA SHIGEYUKI ,  OHGOSHI TOSHIHIDE ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  ISHII HIROSHI ,  YUI YUHI ,  OHTSUKA YOSHINORI

IPC: G03G15/08

Abstract: It is an object of the present invention to provide a developing apparatus that can protect a developer holder and a layer thickness control member from damages and a developer from scattering in itself, while preventing a surplus supply of the developer to both ends on the peripheral surface of the developer holder. In a developing apparatus (DA2), at the back side of a layer thickness control member (1) is provided a back side elastic sealing member (26) coming in contact with the side edges of a both-end elastic sealing members (2) to seal the developer together with the back side elastic sealing member and the both-end elastic sealing members at both ends. The both-end elastic sealing members (2) seals the developer at both ends of a developer holder (3) of its peripheral surface.

公开(公告)号：DE69532553D1

公开(公告)日：2004-03-18

申请号：DE69532553

申请日：1995-11-14

Applicant: SHARP KK

Inventor： KATOH KEIJI ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  WAKADA SHIGEYUKI ,  KIDO EIICHI ,  OTA TOSHIHIRO ,  YUI YUHI

IPC: G03G15/08

Abstract: A developer cartridge (20) for image forming apparatuses which performs development to form images with non-magnetic, one-component type developer. The developer cartridge (20) comprises a developing roller (22) for supplying developer (24) to a photoconductor drum (5a), a developer feed roller (23) for conveying and supplying developer (24) to the developing roller (22) which is placed in non-contact with the developing roller (22) and a developer-layer thickness control member (27) for controlling the thickness of the developer layer of the developing roller (22) in a developer tank (49). The developer feed roller (23) is shaped as a regular polygonal prism. The above configuration contributes to increased capacity of conveyance as compared with circular-section developer feed rollers of the prior art. Additionally, since no recess sections are formed in the surface of the regular polygonal prism, the torque does not increase when developer (24) is scrubbed, thus ensuring consistent operation. The result is improved image quality. Non-magnetic, one-component type developer (440) is deposited in a compressed manner on the developing roller (444) located in the region of development which faces a photoconductor (401) with latent images formed thereon, by supplying the developer (440) in the developer tank (441) to the developer-conveying, developing roller (444) via the agitation roller (442) and the feed member (443) and then sending the supplied developer (440) into the bottleneck between the developing roller (444) and the applying member (446). The developer which passes through the bottleneck is controlled for a consistent amount of application to the developing roller (444) by its temporarily residing in the developer reservoir confined by the developing roller (444), the control roller (445) and the applying member (446), for pressurization thereof to ensure application of the developer (440) to the developing roller (444), followed by rotation of the control roller (445). The above configuration serves to lower friction of developer with the developing roller (444) and the control roller (445), thereby preventing deposition of developer (440) on the control roller (445) while establishing a consistent amount of developer (440) applied to the developing roller (444).

公开(公告)号：DE69211493T2

公开(公告)日：1997-01-30

申请号：DE69211493

申请日：1992-11-12

Applicant: SHARP KK

Inventor： KATO KEIJI ,  UCHIDA KATSUZO ,  IMAI YASUO ,  ANDOU YUKINORI ,  SUGITO TAKASHI

IPC: G03G21/00 ,  G03G15/08

公开(公告)号：DE69816523T2

公开(公告)日：2004-06-03

申请号：DE69816523

申请日：1998-05-27

Applicant: SHARP KK

Inventor： KIDO EIICHI ,  WAKADA SHIGEYUKI ,  OHGOSHI TOSHIHIDE ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  ISHII HIROSHI ,  YUI YUHI ,  OHTSUKA YOSHINORI

IPC: G03G15/08

Abstract: It is an object of the present invention to provide a developing apparatus that can protect a developer holder and a layer thickness control member from damages and a developer from scattering in itself, while preventing a surplus supply of the developer to both ends on the peripheral surface of the developer holder. In a developing apparatus (DA2), at the back side of a layer thickness control member (1) is provided a back side elastic sealing member (26) coming in contact with the side edges of a both-end elastic sealing members (2) to seal the developer together with the back side elastic sealing member and the both-end elastic sealing members at both ends. The both-end elastic sealing members (2) seals the developer at both ends of a developer holder (3) of its peripheral surface.

公开(公告)号：DE69532553T2

公开(公告)日：2004-12-23

申请号：DE69532553

申请日：1995-11-14

Applicant: SHARP KK

Inventor： KATOH KEIJI ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  WAKADA SHIGEYUKI ,  KIDO EIICHI ,  OTA TOSHIHIRO ,  YUI YUHI

IPC: G03G15/08

Abstract: A developer cartridge (20) for image forming apparatuses which performs development to form images with non-magnetic, one-component type developer. The developer cartridge (20) comprises a developing roller (22) for supplying developer (24) to a photoconductor drum (5a), a developer feed roller (23) for conveying and supplying developer (24) to the developing roller (22) which is placed in non-contact with the developing roller (22) and a developer-layer thickness control member (27) for controlling the thickness of the developer layer of the developing roller (22) in a developer tank (49). The developer feed roller (23) is shaped as a regular polygonal prism. The above configuration contributes to increased capacity of conveyance as compared with circular-section developer feed rollers of the prior art. Additionally, since no recess sections are formed in the surface of the regular polygonal prism, the torque does not increase when developer (24) is scrubbed, thus ensuring consistent operation. The result is improved image quality. Non-magnetic, one-component type developer (440) is deposited in a compressed manner on the developing roller (444) located in the region of development which faces a photoconductor (401) with latent images formed thereon, by supplying the developer (440) in the developer tank (441) to the developer-conveying, developing roller (444) via the agitation roller (442) and the feed member (443) and then sending the supplied developer (440) into the bottleneck between the developing roller (444) and the applying member (446). The developer which passes through the bottleneck is controlled for a consistent amount of application to the developing roller (444) by its temporarily residing in the developer reservoir confined by the developing roller (444), the control roller (445) and the applying member (446), for pressurization thereof to ensure application of the developer (440) to the developing roller (444), followed by rotation of the control roller (445). The above configuration serves to lower friction of developer with the developing roller (444) and the control roller (445), thereby preventing deposition of developer (440) on the control roller (445) while establishing a consistent amount of developer (440) applied to the developing roller (444).

公开(公告)号：DE69211493D1

公开(公告)日：1996-07-18

申请号：DE69211493

申请日：1992-11-12

Applicant: SHARP KK

Inventor： KATO KEIJI ,  UCHIDA KATSUZO ,  IMAI YASUO ,  ANDOU YUKINORI ,  SUGITO TAKASHI

IPC: G03G21/00 ,  G03G15/08

公开(公告)号：JPH1144995A

公开(公告)日：1999-02-16

申请号：JP20117997

申请日：1997-07-28

Applicant: SHARP KK

Inventor： OTSUKA YOSHINORI ,  KIDO EIICHI ,  ARAKI HIROSHIGE ,  WAKATA SHIGEYUKI ,  OGOSHI TOSHIHIDE ,  IMAI YASUO ,  YUI TOSHITAKA

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a developing device capable of preventing both end of layer thickness controlling members from directly coming into contact with the developer carrier peripheral surface, a local breakage and excessive supply of developer due to the breakage from occurring, and preventing the inconvenience such as contamination of the inside of the device and the increase of consumption of the developer. SOLUTION: This device is constituted by arranging a layer thickness controlling member 5 on the downstream side of a developer case 4 in the rotary direction of the developer carrier 1, and arranging so that a top end of the layer thickness controlling member 5 surface or the vicinity thereof is held in contact with the whole area in the shaft direction of the developer carrier 1. Thus, by arranging the layer thickness controlling member 5 over whole area on the developer carrier 1, the both end of layer thickness controlling member 5 is respectively prevented from coming into contact with the developer carrier 1 periphery, therefore the local damage thereby is prevented from occurring.

公开(公告)号：JPH1173017A

公开(公告)日：1999-03-16

申请号：JP7519298

申请日：1998-03-24

Applicant: SHARP KK

Inventor： OGOSHI TOSHIHIDE ,  OTSUKA YOSHINORI ,  KIDO EIICHI ,  YUI TOSHITAKA ,  WAKATA SHIGEYUKI ,  ARAKI HIROSHIGE ,  IMAI YASUO ,  ISHII HIROSHI

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To prevent the damage of both end peripheries of a developer carrier and a layer-thickness regulating body, and to eliminate the splashing of the developer by eliminating the contact of both the end peripheries thereof, while preventing the excess feeding of the developer to both end parts of a developer carrier. SOLUTION: The width of a layer-thickness regulating body 1 in the lengthwise direction is made larger than the width of a developer carrier 3 in the lengthwise direction, and both side peripheries 1a of the layer-thickness regulating body 1 are positioned outside both side peripheries 3a of the developer carrier 3. The inside peripheries 2a of sealing bodies 2 are positioned inside the side peripheries 3a of the developer carrier 3, and also they are positioned outside the image region side peripheries of an image carrying body 5 or are brought into coincident with the extended line of the side peripheries thereof.