公开(公告)号：US5389487A

公开(公告)日：1995-02-14

申请号：US237409

申请日：1994-05-03

申请人： Hiroaki Kawakami ,  Shinji Doi ,  Keita Nozawa ,  Masatsugu Fujiwara ,  Masashi Jimbo

发明人： Hiroaki Kawakami ,  Shinji Doi ,  Keita Nozawa ,  Masatsugu Fujiwara ,  Masashi Jimbo

IPC分类号： G03G9/087 ,  G03G9/08 ,  G03G15/08 ,  H04N1/29 ,  G03G13/08

CPC分类号： G03G9/08711 ,  G03G9/08795 ,  G03G9/08797

摘要： An image forming process is disclosed which uses a non-magnetic one-component type developer comprising a finder resin and a releasing agent having specific properties. The developer has such advantages as being excellent in low-temperature fixability as well as anti-offset property.

摘要翻译： 公开了一种图像形成方法，其使用包含取景器树脂和具有特定性质的脱模剂的非磁性单组分型显影剂。 显影剂具有优异的低温定影性以及抗偏移性的优点。

公开(公告)号：US5213933A

公开(公告)日：1993-05-25

申请号：US706184

申请日：1991-05-28

申请人： Ichirou Osaki ,  Keita Nozawa ,  Kuniko Kobayashi ,  Masatsugu Fujiwara ,  Masayoshi Shimamura

发明人： Ichirou Osaki ,  Keita Nozawa ,  Kuniko Kobayashi ,  Masatsugu Fujiwara ,  Masayoshi Shimamura

IPC分类号： G03G9/087 ,  G03G9/09 ,  G03G9/097

CPC分类号： G03G9/08726 ,  G03G9/08711 ,  G03G9/08737 ,  G03G9/0912 ,  G03G9/0914 ,  G03G9/09716 ,  G03G9/09741

摘要： A positively chargeable magnetic toner comprises positively chargeable magnetic toner particles having at least a binder resin, a magnetic substance and a charge controlling agent; wherein the binder resin contains (A) a vinyl polymer having carboxyl groups, acid anhydride groups, partial esters thereof or mixtures of the groups and having and an acid value of 5 to 30, and (B) a copolymer obtained by polymerizing at least a diolefin monomer and a vinyl monomer; and wherein the charge controlling agent contains (C) a quaternary ammonium salt and (D) a nigrosine dye or a triphenylmethane dye, the ratio by weight among the components (A), (B), (C) and (D) being within the range of (A):(B):(C):(D)=80 to 30:70 to 20:2.0 to 0.5: 2.0 to 0.1 relative to 100 parts of the total weight of the components (A) and (B). The present invention also provides an image forming process, an image forming apparatus and a facsimile apparatus, all of which use the positively chargeable magnetic toner.

摘要翻译： 可带正电的磁性调色剂包括具有至少粘合剂树脂，磁性物质和电荷控制剂的可带电荷的磁性调色剂颗粒; 其中所述粘合剂树脂含有（A）具有羧基的乙烯基聚合物，酸酐基，其偏酯或基团的混合物，其酸值为5〜30，和（B）通过使至少 二烯单体和乙烯基单体; 并且其中电荷控制剂含有（C）季铵盐和（D）苯胺黑染料或三苯甲烷染料，组分（A），（B），（C）和（D）中的重量比在 （A）：（B）：（C）:( D）= 80〜30:70〜20:2.0〜0.5:2.0〜0.1的范围，相对于成分（A）和（A） B）。 本发明还提供一种图像形成处理，图像形成装置和传真装置，所有这些都使用可带正电的磁性调色剂。

公开(公告)号：US20050208406A1

公开(公告)日：2005-09-22

申请号：US11125373

申请日：2005-05-10

申请人： Keita Nozawa ,  Atsushi Kubo ,  Masanori Ito ,  Tomoaki Igarashi ,  Kiyokazu Suzuki

发明人： Keita Nozawa ,  Atsushi Kubo ,  Masanori Ito ,  Tomoaki Igarashi ,  Kiyokazu Suzuki

IPC分类号： G03G9/08 ,  G03G9/097

CPC分类号： G03G9/09725 ,  G03G9/09708

摘要： An electrophotographic toner is formed as a blend of toner particles and external additives. The external additives include (1) first inorganic fine particles having an average primary particle size of 80-800 nm of oxide of a metal selected from the group consisting of titanium, aluminum, zinc and zirconium, (2) second inorganic fine particles other than silica having an average primary particle size of below 80 nm and (3) silica fine particles having an average primary particle size of below 30 nm. As a result, the toner can be made free from difficulties, such as melt-sticking onto an image-bearing member in a low humidity environment, roughening of halftone images in a low humidity environment, toner blot-down after storage at high temperatures or in continuous image formation on a large number of sheets, fog in continuous formations of images of low color area percentage in a low humidity environment, and re-transfer in multi-color image formation. Thus, the toner is suitably used in a multi-color image forming system.

公开(公告)号：US06187496B1

公开(公告)日：2001-02-13

申请号：US08821071

申请日：1997-03-20

申请人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa ,  Kazuyoshi Hagiwara ,  Minoru Shimojo ,  Rika Shinba ,  Masami Fujimoto ,  Tsutomu Onuma

发明人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa ,  Kazuyoshi Hagiwara ,  Minoru Shimojo ,  Rika Shinba ,  Masami Fujimoto ,  Tsutomu Onuma

IPC分类号： G03G9083

CPC分类号： G03G9/10 ,  G03G9/083 ,  G03G9/0834 ,  G03G9/0839 ,  G03G9/087 ,  G03G9/08746 ,  G03G9/08773 ,  G03G9/08782 ,  G03G9/08791 ,  G03G9/08797 ,  G03G9/09 ,  G03G9/0904 ,  G03G9/0906 ,  G03G9/097 ,  G03G9/09733 ,  G03G9/09766 ,  G03G9/107 ,  Y10S430/102

摘要： A toner for developing an electrostatic image is formed of toner particles; wherein each toner particle includes (i) 100 wt. parts of a binder resin having a glass transition point (Tg) of 50-70° C., (ii) 0.2-20 wt. parts of solid wax, and (iii) colorant particles or magnetic powder, (iv) lubricant particles carrying a liquid lubricant, so that the toner particle retains at its surface the liquid lubricant gradually released from the particles (iv). The toner may be further blended with an organically treated inorganic fine powder to provide a developer. The toner or developer retains good lubricity and releasability so that it is suitable to be used in an image forming method including means contacting a latent image-bearing means, such as a contact charging means, a contact transfer means or a contact cleaning means.

摘要翻译： 用于显影静电图像的调色剂由调色剂颗粒形成; 其中每个调色剂颗粒包括（i）100重量％ 玻璃化转变点（Tg）为50-70℃的粘合剂树脂的部分，（ii）0.2-20重量％ 部分固体蜡，和（iii）着色剂颗粒或磁性粉末，（iv）载有液体润滑剂的润滑剂颗粒，使得调色剂颗粒在其表面保留液体润滑剂从颗粒（iv）逐渐释放。 调色剂可以进一步与有机处理的无机细粉混合以提供显影剂。 调色剂或显影剂保持良好的润滑性和脱模性，因此适合用于图像形成方法，包括使潜像承载装置（例如接触充电装置，接触转印装置或接触清洁装置）接触的装置。

公开(公告)号：US4857432A

公开(公告)日：1989-08-15

申请号：US194173

申请日：1988-05-16

申请人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa

发明人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Keita Nozawa

IPC分类号： G03G9/09 ,  G03G9/097

CPC分类号： G03G9/09783 ,  G03G9/091

摘要： A toner for developing electrostatic latent images, comprises:100 parts by weight of a binder resin;20 to 200 parts by weight of magnetic powder; and0.01 to 10 parts by weight of a compoundrepresented by the following formula ##STR1## wherein A is a phenylene group, which may have a substituent selected from a nitro group, a halogen atom, an alkoxy group having 1 to 18 carbon atoms, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group having 7 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms; B is a phenylene group or a naphthylene group which may have a substituent selected from a nitro group, a halogen atom, a carboxyl group, an anilide group, an alkoxy group having 1 to 18 carbon atoms, a carboxyester group having 2 to 18 carbon atoms, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group having 7 to 18 carbon atoms or an aryl group having 6 to 18 carbon atoms; X and Y each are --O--, --COO--, --S-- or ##STR2## where R is hydrogen or an alkyl having 1 to 4 carbon atoms; M represents scandium, vanadium, manganese or zinc; C represents hydrogen, sodium, potassium, ammonium or organic ammonium; with the proviso that when A or B has plural substituents, they may be either the same or different.

公开(公告)号：US06706458B2

公开(公告)日：2004-03-16

申请号：US10279126

申请日：2002-10-24

申请人： Keita Nozawa ,  Atsushi Kubo ,  Masanori Ito ,  Tomoaki Igarashi ,  Kiyokazu Suzuki

发明人： Keita Nozawa ,  Atsushi Kubo ,  Masanori Ito ,  Tomoaki Igarashi ,  Kiyokazu Suzuki

IPC分类号： G03G9097

CPC分类号： G03G9/09725 ,  G03G9/09708

摘要： An electrophotographic toner is formed as a blend of toner particles and external additives. The external additives include (1) first inorganic fine particles having an average primary particle size of 80-800 nm of oxide of a metal selected from the group consisting of titanium, aluminum, zinc and zirconium, (2) second inorganic fine particles other than silica having an average primary particle size of below 80 nm and (3) silica fine particles having an average primary particle size of below 30 nm. As a result, the toner can be made free from difficulties, such as melt-sticking onto an image-bearing member in a low humidity environment, roughening of halftone images in a low humidity environment, toner blot-down after storage at high temperatures or in continuous image formation on a large number of sheets, fog in continuous formations of images of low color area percentage in a low humidity environment, and re-transfer in multi-color image formation. Thus, the toner is suitably used in a multi-color image forming system.

摘要翻译： 作为调色剂颗粒和外部添加剂的混合物形成电子照相调色剂。 外部添加剂包括（1）选自钛，铝，锌和锆的金属的氧化物的平均一次粒径为80-800nm的第一无机细颗粒，（2）除了钛，铝，锌和锆之外的第二无机细颗粒 平均一次粒径小于80nm的二氧化硅和（3）平均一次粒径小于30nm的二氧化硅微粒。 结果，可以使调色剂不受困扰，例如在低湿度环境下熔融粘附到图像承载部件上，在低湿度环境下对半色调图像进行粗糙化，在高温下储存后的调色剂印迹下降;或 在大量纸张的连续成像中，在低湿度环境下连续形成低色彩区域图像的雾，并且在多色图像形成中重新转印。 因此，调色剂适用于多色成像系统。

公开(公告)号：US5618647A

公开(公告)日：1997-04-08

申请号：US520558

申请日：1995-08-28

申请人： Tsutomu Kukimoto ,  Yasuhide Goseki ,  Motoo Urawa ,  Masayoshi Shimamura ,  Keiji Okano ,  Keita Nozawa ,  Satoshi Yoshida ,  Masaki Ojima

发明人： Tsutomu Kukimoto ,  Yasuhide Goseki ,  Motoo Urawa ,  Masayoshi Shimamura ,  Keiji Okano ,  Keita Nozawa ,  Satoshi Yoshida ,  Masaki Ojima

IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G9/083

CPC分类号： G03G9/09716 ,  G03G9/0819 ,  G03G9/0821

摘要： A magnetic toner has magnetic toner particles containing a binder resin and a magnetic material, and an inorganic fine powder treated with an organic compound. The magnetic toner has a volume average particle diameter D.sub.v (.mu.m) of 3 .mu.m.ltoreq.D.sub.v

摘要翻译： 磁性调色剂具有含有粘合剂树脂和磁性材料的磁性调色剂颗粒和用有机化合物处理的无机细粉末。 磁性调色剂的体积平均粒径Dv（μm）为3μm，Dv <6μm，重均粒径D4（μm）为3.5μmD4 =6.5μm， 磁性调色剂的粒径分布为5μm以下的粒径为5μm以下的粒子的百分数Mr％为Mr％，数量为60％，颗粒与粒子的比率为Nr 磁性调色剂的粒径分布为3.17μm或更小，磁性调色剂的体积粒度分布为3.17μm或更小的粒子的Nv为2.0至8.0，Nv / Nv 。

公开(公告)号：US5532101A

公开(公告)日：1996-07-02

申请号：US526564

申请日：1995-09-11

申请人： Keita Nozawa ,  Satoshi Yoshida ,  Tsutomu Kukimoto

发明人： Keita Nozawa ,  Satoshi Yoshida ,  Tsutomu Kukimoto

IPC分类号： G03G9/083 ,  G03G9/097 ,  G03G13/16 ,  G03G15/16 ,  G03G21/10

CPC分类号： G03G9/09716 ,  G03G13/16 ,  G03G15/167 ,  G03G9/0834

摘要： An image forming method, including steps of: charging a photosensitive member; exposing the photosensitive member so that an electrostatically charged image is formed; developing the electrostatically charged image so that a toner image is formed; transferring the toner image to a transfer member by transfer means; and cleaning residual toner particles on the photosensitive member by cleaning means after the toner image has been transferred, wherein the photosensitive member rotates at peripheral speed V (mm/sec); the transfer means is disposed so that the distance from a developing position on the photosensitive member to a transfer position in a direction of rotation of the photosensitive member is d.sub.1 (mm); d.sub.1 /v is 0.17 sec. or less; and developing the electrostatically charged image with toner having a triboelectric charge of .vertline.5.vertline. to .vertline.50.vertline. .mu.c/g and containing 30% by number or less of toner particles having sizes below 4 .mu.m.

摘要翻译： 一种图像形成方法，包括以下步骤：对感光构件充电; 曝光感光构件，使得形成静电荷图像; 显影静电电荷的图像，从而形成调色剂图像; 通过转印装置将调色剂图像转印到转印部件上; 并且在调色剂图像转印之后通过清洁装置清洁感光构件上的残留调色剂颗粒，其中感光构件以圆周速度V（mm / sec）旋转; 传送装置设置成使得从感光构件上的显影位置到感光构件的旋转方向上的转印位置的距离为d1（mm）; d1 / v为0.17秒。 或更少; 并用具有| 5 |的摩擦电荷的调色剂显影静电电荷的图像 到| 50 | mu c / g，含有30％以下的尺寸在4μm以下的调色剂颗粒。

公开(公告)号：US6060202A

公开(公告)日：2000-05-09

申请号：US046435

申请日：1998-03-24

申请人： Yoshihiro Ogawa ,  Koichi Tomiyama ,  Keita Nozawa ,  Shunji Suzuki

发明人： Yoshihiro Ogawa ,  Koichi Tomiyama ,  Keita Nozawa ,  Shunji Suzuki

IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G13/08

CPC分类号： G03G9/0819 ,  G03G9/097

摘要： An electrophotographic toner including a blend of toner particles, and external additive particles, is provided with characteristic particle size distribution conditions, i.e., (i) a particle size distribution based on a Coulter counter measurement, including a weight-average particle size D4 of X .mu.m and Y % by number of particles having sizes of 2.00-3.17 .mu.m satisfying:-5X+35.ltoreq.Y.ltoreq.-25X+180 (1)3.5.ltoreq.X.ltoreq.6.5 (2), and(ii) a particle size distribution based on a flow particle image analyzer measurement, including A % by number of particles having circle-equivalent diameters of at least 1.00 .mu.m and below 1.03 .mu.m and B % by number of particles having circle-equivalent diameters of at least 2.00 .mu.m and below 2.06 .mu.m satisfying:B-A.ltoreq.0.30 (3).As a result, the toner is provided with a stable developing performance even in a long period of continuous image formation in a high temperature/high humidity environment.

摘要翻译： 包括调色剂颗粒和外部添加剂颗粒的混合物的电子照相调色剂具有特征粒度分布条件，即（i）基于库尔特计数器测量的粒度分布，包括X的重均粒径D4 μm和Y％，其粒径为2.00-3.17μm，满足：-5X + 35

公开(公告)号：US6033817A

公开(公告)日：2000-03-07

申请号：US902320

申请日：1997-07-29

申请人： Hiroshi Yusa ,  Motoo Urawa ,  Keita Nozawa ,  Yuki Karaki ,  Kazuo Maruyama

发明人： Hiroshi Yusa ,  Motoo Urawa ,  Keita Nozawa ,  Yuki Karaki ,  Kazuo Maruyama

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/083

CPC分类号： G03G9/0819 ,  G03G9/0821 ,  G03G9/0827

摘要： A toner for developing an electrostatic image is disclosed which has at least one endothermic peak in the temperature region of 120.degree. C. or below in differential thermal analysis and contains, in its particles having particle diameters of 3 .mu.m or larger, not less than 93% by number of particles having a circularity of at least 0.90 and less than 30% by number of particles having a circularity of at least 0.98. The toner does not cause the re-transfer under high transfer current conditions and can realize the formation of good images with high image density. Also, an image forming method using the toner is disclosed.

摘要翻译： 公开了一种用于显影静电图像的调色剂，其在差示热分析中在120℃或更低的温度区域中具有至少一个吸热峰，并且在其粒径为3μm或更大的颗粒中不少于 93个数量的圆形度为至少0.90且小于30％的颗粒的圆形度为至少0.98的颗粒。 调色剂在高转印电流条件下不会导致再转印，并能实现高图像浓度的良好图像的形成。 此外，公开了使用调色剂的图像形成方法。