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11. 发明专利

JP2004184853A Method and device for forming image 有权
公开(公告)号：JP2004184853A
公开(公告)日：2004-07-02
申请号：JP2002353903
申请日：2002-12-05
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TAKAHASHI YUTAKA , SUZUKI HIROHARU , KASAI TADASHI , SHU HIYO , AOKI MITSUO , FURUICHI YASUSHI , WATANABE SHIGERU
IPC分类号： G03G9/08 , F16C13/00 , G03G9/087 , G03G15/08 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a method for forming images in which a gap is reduced in order to maintain enough transfer electric field by using a transfer roll having a surface elastic layer and applying transfer pressure and which minimizes the occurrence of transfer dust even when using polymerized toner, and to provide a device therefor. SOLUTION: In the method (device) for forming images, an electrostatic latent image is formed on an image carrier 1 and developed with toner and the toner image on the image carrier is electrostatically transferred to a transfer body by using a transfer roller 52. A pressure of 1 to 10 N/cm is applied between the transfer roller and the image carrier by a spring 57b or the like. Two elastic layers different in hardness are provided between the image carrier and the transfer roller, wherein the surface layer 52a is softer and an internal layer 52b is harder. The transfer bias current between the image carrier and the transfer roller is 0.05 to 0.2 μA/cm, and polymerized toner consisting of modified polyester is used. COPYRIGHT: (C)2004,JPO&NCIPI

12. 发明专利

JP2004117460A Image forming method 审中-公开
公开(公告)号：JP2004117460A
公开(公告)日：2004-04-15
申请号：JP2002276749
申请日：2002-09-24
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HASEGAWA HISAMI , AOKI MITSUO
IPC分类号： G03G9/08 , G03G9/087 , G03G9/097 , G03G15/02 , G03G15/08 , G03G15/16 , G03G15/20 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To provide an image forming method with which the degradation in electrostatic chargeability with lapse of time can be suppressed without being affected by environmental conditions and without the degradation in the aggregation properties of recycled toners, and images of good graininess can be obtained. SOLUTION: The toners used in the developing step of the image forming method contains at least a binder resin, a coloring agent, wax, and a charge controlling agent. When the calorific value ratio of the peak of the wax in a DSC curve measured by a differential scanning calorimeter is defined as Pw, the calorific value ratio of the peak of the binder resin as Pb, and the calorific value ratio Pw/Pb of Pw and Pb as R, the ratio R2/R1 of the calorific value ratio R1 of the fresh toners and the calorific value ratio R2 of the recycled toners ranges from 1.0 to 1.2. COPYRIGHT: (C)2004,JPO

13. 发明专利

JP2004109576A Image forming method 有权
公开(公告)号：JP2004109576A
公开(公告)日：2004-04-08
申请号：JP2002272809
申请日：2002-09-19
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HASEGAWA HISAMI , AOKI MITSUO
IPC分类号： G03G9/08 , G03G9/087 , G03G9/097 , G03G15/02 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide an image forming method in which no reduction in charging amount in an environment at high temperature and high humidity is caused, the charging amount distribution of a developer does not become broad even when the charging amount of a carrier is small, and a fog-free excellent image with good granularity is obtained. SOLUTION: In the image forming method comprising a charging step, a step of forming an electrostatic charge image on a charged member to be charged, a developing step, a transferring step, a step of cleaning the surface of the member after transfer, and a step of heat-fixing a toner image by passing the toner image through one or two resilient rollers, the toner comprises at least a binder resin, a colorant and a charge control agent, wherein the charge control agent is a compound comprising zirconium and an aromatic oxycarboxylic acid or a salt thereof and the charge control agent has a main diffraction peak A at a Bragg angle 2θ of 5.5±0.3° and a diffraction intensity of 2,000-15,000 cps at a scanning speed of 0.5-4°/min when irradiated with a specific X-ray of CuKα. COPYRIGHT: (C)2004,JPO

14. 发明专利

JP2004102261A Electrostatic charge image developing toner, two-component developer and process cartridge 有权
公开(公告)号：JP2004102261A
公开(公告)日：2004-04-02
申请号：JP2003292352
申请日：2003-08-12
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SHIMODA NAOTO , AOKI MITSUO , KONDO MAIKO , HASEGAWA HISAMI
IPC分类号： G03G9/08 , G03G9/087 , G03G9/09 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a toner used for a roller heat fixing method and excellent in low temperature fixability and anti-offsetting property and capable of preventing a deterioration in a developer by selecting a resin and a wax for the toner under attention to the relation among 1/2 outflow temperature T, dielectric loss and fixing control temperature. SOLUTION: The toner used for a roller heat and pressure fixing device comprises at least a wax, a binder resin and carbon black, and when the 1/2 outflow temperature T 1/2 (°C) of the toner measured with an overhead flow tester is ≤160°C, the relation among the T 1/2 of the toner, dielectric loss tanδ and the fixing control temperature T (°C) of the fixing device satisfies expression (1): T≤A×T 1/2 +B×tanδ-105.0 (where A=1.9 and B=3.8×10 3 ) and expression (2): 4.0×10 -3 ≤tanδ≤6.5×10 -3 . COPYRIGHT: (C)2004,JPO

15. 发明专利

JP2004102022A Image forming apparatus 审中-公开
公开(公告)号：JP2004102022A
公开(公告)日：2004-04-02
申请号：JP2002265424
申请日：2002-09-11
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KASAI TADASHI , SHU HIYO , AOKI MITSUO , HIGUCHI HIROTO , KONDO MAIKO , NAKAYAMA SHINYA , SUZUKI HIROHARU , TAKAHASHI YUTAKA , FURUICHI YASUSHI
IPC分类号： G03G9/083 , G03G5/047 , G03G15/08 , G03G15/16 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus which avoids device upsizing, fixing creases, image thickening, or the like brought about in a system wherein images are fixed simultaneously with transfer by pressure, and surely suppresses image degradation caused by transfer dust or the like without using capsule toner. SOLUTION: In a copying machine being the image forming apparatus which has a photoreceptor 1 being a latent image carrier for forming a latent image on a surface thereof, a developing device 4 being a developing means for using a two-component developer development system to make the latent image into a visible toner image by toner sticking, and a transfer device 5 being a transfer means for transferring the toner image formed on the photoreceptor 1 being the latent image carrier onto a transfer material by pressure without adopting an electrostatic transfer system, a fixing means 7 is provided which fixes the toner image transferred to the transfer material, on the transfer material, and ten-point height of irregularities of the surface of the photoreceptor 1 is made higher than that of the transfer material. COPYRIGHT: (C)2004,JPO

16. 发明专利

JP2004054064A Image forming method 有权
标题翻译：图像形成方法
公开(公告)号：JP2004054064A
公开(公告)日：2004-02-19
申请号：JP2002213193
申请日：2002-07-22
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SHU HIYO , AOKI MITSUO , HIGUCHI HIROTO , KONDO MAIKO , NAKAYAMA SHINYA , SUZUKI HIROHARU , TAKAHASHI YUTAKA , KASAI TADASHI , FURUICHI YASUSHI
IPC分类号： G03G9/083 , G03G5/04 , G03G5/147 , G03G15/16 , G03G15/20 , G03G15/24
摘要： PROBLEM TO BE SOLVED: To provide an image forming method capable of a forming high-quality image having excellent dot reproducibility and line reproducibility and good graininess by suppressing the deterioration of the image due to dust and blotch of toners in transfer. SOLUTION: The image forming method has primary fixing of the electrostatic latent image formed on a photoreceptor to form the toner image and simultaneously fixing and transferring the formed toner image to the transfer paper by pressure and secondary fixing of transferring the transfer paper subjected to the primary fixing and heat fixing the image by passing the transfer paper through a heating means, in which development is performed by one-component development as development, the toners are magnetic one-component toners of 100 to 160°C in softening temperature Tm and 3.0 to 10.0 μm in weight average grain size and the fixability of the toners to the transfer paper measured by a tape peeling method is primary fixing COPYRIGHT: (C)2004,JPO
摘要翻译：解决问题：提供一种图像形成方法，其能够通过抑制由于转印中的调色剂的灰尘和斑点而导致的图像劣化，从而形成具有优异的点重现性和线重现性以及良好的粒度的高质量图像。解决方案：图像形成方法主要固定在感光体上形成的静电潜像以形成调色剂图像，同时通过压力和二次定影将形成的调色剂图像定影并转印到转印纸上，通过使转印纸通过加热装置进行主要固定和热定影，其中通过单组分显影作为显影进行显影，调色剂是软化温度Tm为100至160℃的磁性单组分调色剂重均粒径为3.0〜10.0μm，通过胶带剥离法测定的转印纸上的调色剂的定影性为一次固定<二次固定。版权所有（C）2004，JPO

17. 发明专利

JP2004054053A Image forming method 有权
公开(公告)号：JP2004054053A
公开(公告)日：2004-02-19
申请号：JP2002212963
申请日：2002-07-22
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KONDO MAIKO , SUZUKI HIROHARU , FURUICHI YASUSHI , KASAI TADASHI , TAKAHASHI YUTAKA , AOKI MITSUO , HIGUCHI HIROTO , SHU HIYO , NAKAYAMA SHINYA
IPC分类号： G03G9/08 , G03G5/147 , G03G15/16 , G03G15/20 , G03G15/24
摘要： PROBLEM TO BE SOLVED: To provide an image forming method with which the deterioration in images by transfer is prevented and the images of high image quality can be formed in a transfer step in which the deterioration of the images is liable to occur in forming the images by an electrophotographic system. SOLUTION: The image forming method has a developing step of developing the electrostatic latent image formed on a photoreceptor by dry type toner, then a primary fixing step of transferring and simultaneously fixing the formed toner image to transfer paper by pressure alone, and further a secondary fixing step of fixing the primarily fixed toner image on the transfer paper by passing the transfer paper with the toner image on it through a heating, pressurizing, and fixing device having a fixing roller. The nonmagnetic toner of ≥1x10 9 (Ω cm) in volume resistivity and 3.0 to 10.0 μm in weight average grain size is used. COPYRIGHT: (C)2004,JPO

18. 发明专利

JP2003302796A Image forming method and image forming apparatus 审中-公开
标题翻译：图像形成方法和图像形成装置
公开(公告)号：JP2003302796A
公开(公告)日：2003-10-24
申请号：JP2002110249
申请日：2002-04-12
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI HIROHARU , AOKI MITSUO , HIGUCHI HIROTO , NAKAYAMA SHINYA , KONDO MAIKO , SHU HIYO , FURUICHI YASUSHI , KASAI TADASHI , TAKAHASHI YUTAKA
IPC分类号： G03G9/08 , C10M105/24 , C10N10/04 , C10N40/00 , C10N40/06 , G03G5/04 , G03G5/147 , G03G13/00 , G03G15/16 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To provide an image forming method and an image forming apparatus by which a high-quality image is obtained by preventing image deterioration in a transfer and fixing stage by a transfer method in which damage on the periphery of a photoreceptor by heating is reduced without using an electrostatic transfer system. SOLUTION: In the image forming method, an electrostatic latent image is formed on an image carrier 1 and developed by a developing device 4, and a toner image on the image carrier 1 after a developing stage is transferred to a transfer material by a belt transfer device 5 and fixed on the transfer material by a fixing device 7. Assuming that the weight average particle size of toner is (a), the surface roughness Rz of the image carrier 1 is ≤a/2, and the surface roughness Rz of the transfer material is ≥2a. Then, the developing stage is performed by a non-contact developing system, and a transfer stage is performed by imparting heat and pressure to the transfer material through the belt 53 of the device 5. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种图像形成方法和图像形成装置，通过在转印和定影阶段通过防止图像周围的损伤的转印方法来获得高质量图像，通过加热而不使用静电转印系统来减少感光体。解决方案：在图像形成方法中，静电潜像形成在图像载体1上并由显影装置4显影，并且在显影阶段之后的图像载体1上的调色剂图像被转印到转印材料上带传送装置5，并通过定影装置7固定在转印材料上。假设调色剂的重均粒径为（a），图像载体1的表面粗糙度Rz为≤a/ 2，表面粗糙度转印材料的Rz≥2a。然后，通过非接触显影系统进行显影阶段，并通过装置5的带53向转印材料施加热和压力来进行转印阶段。（C）2004，JPO

19. 发明专利

JP2003015346A Image forming device and toner 审中-公开
标题翻译：图像形成装置和调色剂
公开(公告)号：JP2003015346A
公开(公告)日：2003-01-17
申请号：JP2001194618
申请日：2001-06-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI HIROHARU , AOKI MITSUO , YAZAKI KAZUYUKI , SHIMODA NAOTO , MATSUDA HIROAKI , KOIKE TAKAYUKI , KASAI TADASHI , TAKAHASHI YUTAKA , ITO AKIHIRO
IPC分类号： G03G9/08 , G03G9/10 , G03G15/08 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To obtain an image forming method introducing a two-component developing method capable of obtaining a stable image even in the case of loading to a machine having a lot of thermal stress and mechanical stress on toner, also, to obtain toner for two-component developer capable of obtaining a stable image, to obtain the aforesaid effect in the image forming method equipped with a toner recycling mechanism specially introducing a powder pump system utilizing an air flow, besides, to obtain the toner for two- component developer capable of obtaining a stable image without causing an abnormal image (fixation offset image). SOLUTION: As for the image forming method using the two-component developer with wax dispersed and constituted of toner and carrier, and utilizing the air flow as a recovered toner carrying means in a recycling system for returning the recovered toner which is recovered by cleaning in an oil-less fixation type electrophotographic image forming device to a developing part, the toner whose aggregation is
摘要翻译：要解决的问题：为了获得即使在加载到对调色剂具有大量热应力和机械应力的机器的情况下也可以获得稳定图像的双组分显影方法的图像形成方法，以获得调色剂对于能够获得稳定图像的双组分显影剂，在配备有特别引入使用空气流的粉末泵系统的调色剂再循环机构的图像形成方法中获得上述效果，此外，获得用于双组分显影剂的调色剂能够获得稳定的图像而不引起异常图像（固定偏移图像）。解决方案：对于使用分散并由调色剂和载体构成的蜡的双组分显影剂的图像形成方法，并且在循环系统中利用空气流作为回收调色剂携带装置，以将通过清洗回收的回收调色剂返回将无油固定型电子照相图像形成装置用于显影部分，其聚集<= 30％的调色剂用于图像形成方法。

20. 发明专利

JP2012189929A Toner for electrophotography development, image forming method, and process cartridge 审中-公开
标题翻译：电摄影发展，图像形成方法和过程盒的调色剂
公开(公告)号：JP2012189929A
公开(公告)日：2012-10-04
申请号：JP2011055166
申请日：2011-03-14
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YAMADA SAORI , AOKI MITSUO , NAKAJIMA HISASHI , NAGAYAMA MASASHI , TANIGUCHI SHIGENORI
IPC分类号： G03G9/09 , G03G9/08 , G03G9/087 , G03G15/01 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a toner for an electrophotography development which achieves extremely excellent low-temperature fixability, high hot offset resistance properties and adequate storage stability, has high coloring power and hiding power with a low adhesion amount, and can form a high-gloss image, and to provide an image forming method and a process cartridge.SOLUTION: In the toner for the electrophotography which contains at least a binder resin, a coloring agent and a releasing agent, as for the viscoelasticity of the toner, the tangent loss represented by loss modulus (G")/storage modulus (G')=tangent loss (tan δ) has a peak at 80-160 [°C] and has a peak value of 3 or more.
摘要翻译：要解决的问题：为了提供一种电子照相显影用调色剂，其具有极好的低温定影性，高耐热偏移性和充分的保存稳定性，具有较高的着色力和遮盖力，粘附量低，并且可以形成高光泽图像，并提供图像形成方法和处理盒。解决方案：在用于电子照相术的调色剂中，至少包含粘合剂树脂，着色剂和脱模剂，对于调色剂的粘弹性，损耗模量（G“）/储能模量（G”）表示的切线损耗 G'）=正切损耗（tanδ）在80-160℃具有峰值，峰值为3以上。版权所有（C）2013，JPO＆INPIT

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