公开(公告)号：US11320760B2

公开(公告)日：2022-05-03

申请号：US16932191

申请日：2020-07-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masahito Ishino ,  Keiya Nishimura ,  Yoshitaka Imanaka ,  Toshiki Fujita

IPC: G03G15/02 ,  G03G5/05 ,  G03G5/06 ,  G03G5/147

Abstract: An image forming apparatus includes an image bearing member and a charging roller that charges a circumferential surface of the image bearing member to a positive polarity. The image bearing member includes a conductive substrate and a photosensitive layer of a single layer, and satisfies formula (1) shown below. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. 0.60 ≦ V ( Q / S ) × ( d / ɛ r · ɛ 0 ) ( 1 ) In formula (1), Q represents a charge amount [C] of the circumferential surface of the image bearing member, S represents a charge area [m2] of the charged circumferential surface of the image bearing member, d represents a film thickness [m] of the photosensitive layer, co represents vacuum permittivity [F/m], and V represents a value calculated in accordance with formula V=V0−Vr.

公开(公告)号：US10901332B2

公开(公告)日：2021-01-26

申请号：US16506300

申请日：2019-07-09

Applicant: KYOCERA Document Solutions Inc.

Inventor： Toshiki Fujita ,  Nariaki Tanaka ,  Masahito Ishino ,  Kiyotaka Kobayashi

IPC: G03G5/00 ,  G03G5/047 ,  G03G21/00 ,  G03G5/06 ,  G03G5/05

Abstract: In an image forming apparatus, a cleaning member is pressed against a circumferential surface of an image bearing member and collects a toner remaining on the circumferential surface of the image bearing member. The toner has a number average roundness of 0.965 to 0.998. The toner has a D50 of 4.0 μm to 7.0 μm. A linear pressure of the cleaning member on the circumferential surface of the image bearing member is 10 N/m to 40 N/m. The image bearing member includes a single-layer photosensitive layer containing a charge generating material and a hole transport material. Ionization potential IpHTM of the hole transport material and ionization potential IpCGM of the charge generating material satisfy mathematical formula (1) “IpHTM≥5.30 eV”, mathematical formula (2) “IpCGM≥5.30 eV”, and mathematical formula (3) “0.09 eV≤|IpHTM−IpCGM|≤0.30 eV”.

公开(公告)号：US09625850B2

公开(公告)日：2017-04-18

申请号：US15143650

申请日：2016-05-02

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masahito Ishino

IPC: G03G15/02 ,  G03G15/06

CPC classification number: G03G15/065 ,  G03G15/0266

Abstract: A multifunction peripheral includes a transfer belt, a first imaging unit, a second imaging unit, a primary transfer roller, a secondary transfer roller, a developing bias application unit, a charging bias application unit, and a control unit. The control unit performs control such that a first developing bias that is applied to a first developing roller by the developing bias application unit and a a second developing bias that is applied to a second developing roller by the developing bias application unit have opposite phases.

公开(公告)号：US20130343783A1

公开(公告)日：2013-12-26

申请号：US13975944

申请日：2013-08-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Shinki Miyaji ,  Masaki Kadota ,  Yoshitaka Imanaka ,  Hiroka Itani ,  Masahito Ishino

IPC: G03G15/02

CPC classification number: G03G15/02 ,  G03G5/04 ,  G03G5/0596 ,  G03G15/75

Abstract: An image forming apparatus includes a positively-charged single layer type electrophotographic photoreceptor, a charging device with a contact charging roller for charging a surface of the photoreceptor and an exposure device for exposing the charged surface of the photoreceptor to light to form an electrostatic latent image thereon. A developing device develops the electrostatic latent image into a toner image and a transfer device transfers the toner image to a transferred body. The charging roller is made of electrically conductive rubber having an Asker-C rubber hardness of 62 to 81°. A roller surface roughness of the charging roller has an average distance (Sm) between asperity peaks on a cross-sectional curve of 55 to 130 μm and that a ten-point average roughness (Rz) is 9 to 19 μm. The image forming apparatus is capable of preventing carrier trapping, film peeling and uneven charging in the photoreceptor.

Abstract translation: 图像形成装置包括带正电的单层电子照相感光体，具有用于对感光体的表面充电的接触充电辊的充电装置和用于将感光体的带电表面曝光以形成静电潜像的曝光装置 上。 显影装置将静电潜像显影成调色剂图像，并且转印装置将调色剂图像转印到转印体上。 充电辊由Asker-C橡胶硬度为62〜81°的导电橡胶制成。 充电辊的辊表面粗糙度在55-130μm的横截面曲线上具有不均匀峰之间的平均距离（Sm），并且十点平均粗糙度（Rz）为9至19μm。 图像形成装置能够防止感光体中的载体捕获，膜剥离和不均匀充电。

公开(公告)号：US11640120B2

公开(公告)日：2023-05-02

申请号：US17261986

申请日：2019-07-16

Applicant: KYOCERA Document Solutions Inc.

Inventor： Teppei Shibuya ,  Masahito Ishino ,  Toshiki Fujita

IPC: G03G9/08 ,  G03G5/06 ,  G03G5/05 ,  G03G21/00

Abstract: An image forming apparatus includes an image bearing member, a charger, a light exposure device, a development device, a transfer belt, a primary transfer device, a secondary transfer device, and a cleaning member. The cleaning member is pressed against a circumferential surface of the image bearing member and collects residual toner remaining on the circumferential surface of the image bearing member as a result of primary transfer of a toner. The transfer belt has a surface resistivity of at least 6 Log Ω and no greater than 11 Log Ω. A linear pressure of the cleaning member on the circumferential surface of the image bearing member is at least 10 N/m and no greater than 40 N/m. The image bearing member includes a conductive substrate and a photosensitive layer of a single layer. The image bearing member satisfies formula (1): 0.06 ≦ V ( Q / S ) × ( d / ε r · ε 0 ) . ( 1 )

公开(公告)号：US11340537B2

公开(公告)日：2022-05-24

申请号：US17373245

申请日：2021-07-12

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masahito Ishino ,  Kotatsu Kawaguchi ,  Takahisa Nakaue ,  Yukari Ota ,  Tomohiro Tamaki

IPC: G03G15/08

Abstract: A development device includes a development housing, a development roller, a supply roller and a layer thickness regulating member. The development housing stores a nonmagnetic one-component toner. The development roller is formed by a cylindrical elastic body, and moves in a same direction as a rotational direction of a rotatable photosensitive drum at a development nip area while coming into contact with the photosensitive drum. The supply roller is formed by a cylindrical elastic body, and supplies the toner to the development roller and collects the toner from the development roller. The development roller has a surface free energy within a range of 5 mJ/m2 or more and 27 mJ/m2 or less.

公开(公告)号：US09740134B2

公开(公告)日：2017-08-22

申请号：US15346142

申请日：2016-11-08

Applicant: KYOCERA Document Solutions Inc.

Inventor： Minoru Wada ,  Masaru Hatano ,  Masaki Kadota ,  Masahito Ishino ,  Keisuke Isoda ,  Atsushi Ishizaki

IPC: G03G15/02 ,  G03G15/043 ,  G03G15/00

CPC classification number: G03G15/0266 ,  G03G15/043 ,  G03G15/5058

Abstract: An image forming apparatus includes an apparatus main body, a photoreceptor drum, a charging apparatus, an exposure apparatus, a developing device, a charging bias applying unit, a developing bias applying unit, an image condition adjusting unit, and a print density measurement unit. The image condition adjusting unit forms a second electric potential region by applying the charging bias where a first differential electric potential is subtracted from a first tentative charging bias on a circumference surface of a photoreceptor drum, and forms a second toner image by an electric potential difference between the second electric potential region and a developing roller by applying the target electric potential. The image condition adjusting unit decides value of the charging bias corresponding to the target electric potential from measurement results of print densities of a first toner image and the second toner image measured by the print density measurement unit.

公开(公告)号：US09280092B2

公开(公告)日：2016-03-08

申请号：US14624422

申请日：2015-02-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Minoru Wada ,  Masaru Hatano ,  Yoshinori Horiuchi ,  Akira Matayoshi ,  Ayaka Kondo ,  Motoki Moriguchi ,  Masahito Ishino

IPC: G03G15/08

CPC classification number: G03G15/0889 ,  G03G15/0893

Abstract: A developing device includes a storing portion, a stirring member, a developing roller, a shield plate, and a guide portion. The storing portion stores developer. The stirring member is rotatably provided in the storing portion and stirs the developer in the storing portion by being rotationally driven in a predetermined first rotation direction. The developing roller is rotatably provided above the stirring member, has a magnet that attracts the developer in the storing portion by a magnetic force, and is rotationally driven in a predetermined second rotation direction. The shield plate is made of a nonmagnetic material and provided at a facing position where the developing roller and the stirring member face each other. The guide portion is provided more on an upstream side in the first rotation direction than the facing position, and guides the developer from the storing portion to the developing roller side.

Abstract translation: 显影装置包括存储部分，搅拌部件，显影辊，屏蔽板和引导部分。 存储部存储显影剂。 搅拌构件可旋转地设置在存储部分中，并通过沿预定的第一旋转方向旋转驱动来搅动存储部分中的显影剂。 显影辊可旋转地设置在搅拌构件上方，具有通过磁力吸引存储部中的显影剂的磁体，并且以预定的第二旋转方向旋转驱动。 屏蔽板由非磁性材料制成，并且设置在显影辊和搅拌构件彼此面对的相对位置处。 引导部分在第一旋转方向的上游侧比面对位置更多地设置，并且将显影剂从存储部分引导到显影辊侧。

公开(公告)号：US09141072B2

公开(公告)日：2015-09-22

申请号：US14181370

申请日：2014-02-14

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Eiji Gyotoku ,  Jun Nakai ,  Masahito Ishino

IPC: G03G15/00 ,  G03G21/00 ,  G03G21/20

CPC classification number: G03G21/0064 ,  G03G21/0094 ,  G03G21/20

Abstract: An image forming apparatus includes a heating element, an interior temperature/humidity detection section, and a controller. The heating element is conducted during connection of the image forming apparatus to an external power source to heat an image bearing member. The interior temperature/humidity detection section detects temperature and humidity in the interior of the image forming apparatus. The controller performs a refresh operation when a relative humidity calculated on the basis of the temperature and humidity detected by the interior temperature/humidity detection section immediately after the image forming apparatus is connected to the external power source is higher than the preset value. The refresh operation is an operation for supply of developer from a development device to the image bearing member and for polish of the surface of the image bearing member with the use of a polishing member.

Abstract translation: 图像形成装置包括加热元件，内部温度/湿度检测部和控制器。 在图像形成装置连接到外部电源以加热图像承载部件时，加热元件被传导。 内部温度/湿度检测部分检测图像形成装置内部的温度和湿度。 当在图像形成装置刚刚连接到外部电源之后，基于由内部温度/湿度检测部检测到的温度和湿度计算的相对湿度高于预设值时，控制器执行刷新操作。 刷新操作是将显影剂从显影装置供应到图像承载部件并且通过使用抛光部件对图像承载部件的表面进行抛光的操作。

公开(公告)号：US20150234322A1

公开(公告)日：2015-08-20

申请号：US14624422

申请日：2015-02-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Minoru Wada ,  Masaru Hatano ,  Yoshinori Horiuchi ,  Akira Matayoshi ,  Ayaka Kondo ,  Motoki Moriguchi ,  Masahito Ishino

IPC: G03G15/09

CPC classification number: G03G15/0889 ,  G03G15/0893

Abstract: A developing device includes a storing portion, a stirring member, a developing roller, a shield plate, and a guide portion. The storing portion stores developer. The stirring member is rotatably provided in the storing portion and stirs the developer in the storing portion by being rotationally driven in a predetermined first rotation direction. The developing roller is rotatably provided above the stirring member, has a magnet that attracts the developer in the storing portion by a magnetic force, and is rotationally driven in a predetermined second rotation direction. The shield plate is made of a nonmagnetic material and provided at a facing position where the developing roller and the stirring member face each other. The guide portion is provided more on an upstream side in the first rotation direction than the facing position, and guides the developer from the storing portion to the developing roller side.

Abstract translation: 显影装置包括存储部分，搅拌部件，显影辊，屏蔽板和引导部分。 存储部存储显影剂。 搅拌构件可旋转地设置在存储部分中，并通过沿预定的第一旋转方向旋转驱动来搅动存储部分中的显影剂。 显影辊可旋转地设置在搅拌构件上方，具有通过磁力吸引存储部中的显影剂的磁体，并且以预定的第二旋转方向旋转驱动。 屏蔽板由非磁性材料制成，并且设置在显影辊和搅拌构件彼此面对的相对位置处。 引导部分在第一旋转方向的上游侧比面对位置更多地设置，并且将显影剂从存储部分引导到显影辊侧。