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1. 发明专利

DE69535393T2 未知
公开(公告)号：DE69535393T2
公开(公告)日：2007-10-31
申请号：DE69535393
申请日：1995-11-08
申请人： CANON KK
发明人： YOSHIDA SATOSHI , URAWA MOTOO , AITA SHUICHI , KUKIMOTO TSUTOMU , HANO YOSHIFUMI , NISHIO YUKI
IPC分类号： G03G5/05 , G03G5/147 , G03G9/08 , G03G21/00
摘要： An image forming method and image forming apparatus for charging a photosensitive member, exposing the charged photosensitive member thereby forming an electrostatic latent image, carrying toner with a toner carrying member to bring the toner into contact with the photosensitive member surface, thereby developing the electrostatic latent image and forming a toner image upon the photosensitive member, transferring the toner image that is on the photosensitive member to transfer material such as paper, and conducting a simultaneous developing-cleaning process which recovers residual toner remaining on the photosensitive member following the transfer process, so that toner consumption is greatly reduced and high image quality is maintained at the same time. The angle of contact of the photosensitive member surface to water is 85 DEG or greater, the toner is comprised of at least toner particles possessing binder resin and coloring agent, and an inorganic fine powder, and the toner has an average particle diameter by volume DV ( mu m) of 3 mu m

2. 发明专利

DE69523119D1 未知
公开(公告)号：DE69523119D1
公开(公告)日：2001-11-15
申请号：DE69523119
申请日：1995-11-27
申请人： CANON KK
发明人： NAKAMURA TATSUYA , KATO MASAYOSHI , AITA SHUICHI , INABA KOJI , HAYASE KENGO , NISHIO YUKI
IPC分类号： G03G5/04 , G03G9/08 , G03G9/097 , G03G21/00
摘要： An image forming method comprising; a charging step of electrostatically charging a photosensitive member; an exposure step of exposing the charged photosensitive member to form an electrostatic latent image; a developing step of bringing a toner carried on a developer carrying member, into contact with the surface of the photosensitive member to develop the electrostatic latent image to form a toner image on the photosensitive member; a transfer step of transferring the toner image formed on the photosensitive member, to a transfer medium; and a cleaning-at-development step of collecting the toner remaining on the photosensitive member after the transfer step, onto the developer carrying member; wherein; the surface of said photosensitive member has a contact angle with water of 85 DEG or greater; said toner contains residual monomers in an amount not more than 1,000 ppm; and said toner has a shape factor SF-1 of from 100 to 180 and a shape factor SF-2 of from 100 to 140.

3. 发明专利

DE69535393D1 未知
公开(公告)号：DE69535393D1
公开(公告)日：2007-04-05
申请号：DE69535393
申请日：1995-11-08
申请人： CANON KK
发明人： YOSHIDA SATOSHI , URAWA MOTOO , AITA SHUICHI , KUKIMOTO TSUTOMU , HANO YOSHIFUMI , NISHIO YUKI
IPC分类号： G03G5/05 , G03G5/147 , G03G9/08 , G03G21/00
摘要： An image forming method and image forming apparatus for charging a photosensitive member, exposing the charged photosensitive member thereby forming an electrostatic latent image, carrying toner with a toner carrying member to bring the toner into contact with the photosensitive member surface, thereby developing the electrostatic latent image and forming a toner image upon the photosensitive member, transferring the toner image that is on the photosensitive member to transfer material such as paper, and conducting a simultaneous developing-cleaning process which recovers residual toner remaining on the photosensitive member following the transfer process, so that toner consumption is greatly reduced and high image quality is maintained at the same time. The angle of contact of the photosensitive member surface to water is 85 DEG or greater, the toner is comprised of at least toner particles possessing binder resin and coloring agent, and an inorganic fine powder, and the toner has an average particle diameter by volume DV ( mu m) of 3 mu m

4. 发明专利

DE69523119T2 未知
公开(公告)号：DE69523119T2
公开(公告)日：2002-04-18
申请号：DE69523119
申请日：1995-11-27
申请人： CANON KK
发明人： NAKAMURA TATSUYA , KATO MASAYOSHI , AITA SHUICHI , INABA KOJI , HAYASE KENGO , NISHIO YUKI
IPC分类号： G03G5/04 , G03G9/08 , G03G9/097 , G03G21/00
摘要： An image forming method comprising; a charging step of electrostatically charging a photosensitive member; an exposure step of exposing the charged photosensitive member to form an electrostatic latent image; a developing step of bringing a toner carried on a developer carrying member, into contact with the surface of the photosensitive member to develop the electrostatic latent image to form a toner image on the photosensitive member; a transfer step of transferring the toner image formed on the photosensitive member, to a transfer medium; and a cleaning-at-development step of collecting the toner remaining on the photosensitive member after the transfer step, onto the developer carrying member; wherein; the surface of said photosensitive member has a contact angle with water of 85 DEG or greater; said toner contains residual monomers in an amount not more than 1,000 ppm; and said toner has a shape factor SF-1 of from 100 to 180 and a shape factor SF-2 of from 100 to 140.

5. 发明专利

DE69535174T2 未知
公开(公告)号：DE69535174T2
公开(公告)日：2007-08-23
申请号：DE69535174
申请日：1995-10-02
申请人： CANON KK
发明人： AITA SHUICHI , YOSHIHARA TOSHIYUKI , KUKIMOTO TSUTOMU , YOSHIDA SATOSHI , HANO YOSHIFUMI , NISHIO YUKI
IPC分类号： G03G21/00 , G03G15/04 , G03G15/32
摘要： An electrophotographic image forming method including a toner image transfer step but eliminating an exclusive step for cleaning transfer residual toner is operated without causing ghost images and with good gradation and dot reproducibilities. In the method, the photosensitive member is exposed at an exposure intensity which is at least a minimum exposure intensity and below a maximum exposure intensity. The minimum exposure intensity is determined on a surface potential-exposure intensity characteristic curve of the photosensitive member by determining a first slope S1 of a straight line connecting a point giving a dark part potential Vd and a point giving a value of (Vd + a residual potential Vr)/2, determining a contact point between a tangent line having a slope of S1/20 and the surface potential-exposure intensity characteristic curve and determining the minimum exposure intensity as an exposure intensity at the contact point. The maximum exposure intensity is determined as 5 times a half-attenuation exposure intensity.

6. 发明专利

DE69535174D1 未知
公开(公告)号：DE69535174D1
公开(公告)日：2006-09-28
申请号：DE69535174
申请日：1995-10-02
申请人： CANON KK
发明人： AITA SHUICHI , YOSHIHARA TOSHIUKI , KUKIMOTO TSUTOMU , YOSHIDA SATOSHI , HANO YOSHIFUMI , NISHIO YUKI
IPC分类号： G03G21/00 , G03G15/04 , G03G15/32
摘要： An electrophotographic image forming method including a toner image transfer step but eliminating an exclusive step for cleaning transfer residual toner is operated without causing ghost images and with good gradation and dot reproducibilities. In the method, the photosensitive member is exposed at an exposure intensity which is at least a minimum exposure intensity and below a maximum exposure intensity. The minimum exposure intensity is determined on a surface potential-exposure intensity characteristic curve of the photosensitive member by determining a first slope S1 of a straight line connecting a point giving a dark part potential Vd and a point giving a value of (Vd + a residual potential Vr)/2, determining a contact point between a tangent line having a slope of S1/20 and the surface potential-exposure intensity characteristic curve and determining the minimum exposure intensity as an exposure intensity at the contact point. The maximum exposure intensity is determined as 5 times a half-attenuation exposure intensity.

7. 发明专利

JPH08272146A TONER AND IMAGE FORMING METHOD 失效
公开(公告)号：JPH08272146A
公开(公告)日：1996-10-18
申请号：JP9416695
申请日：1995-03-29
申请人： CANON KK
发明人： NISHIO YUKI , URAWA MOTOO , YOSHIDA SATOSHI , NOZAWA KEITA , KUKIMOTO TSUTOMU
IPC分类号： G03G9/08 , G03G5/05 , G03G5/147 , G03G9/083 , G03G9/097 , G03G15/08
摘要： PURPOSE: To provide a toner which excels in the transcribing performance and can produce a uniform coating on a carrier, by preparing the toner so that a specific azo ferro-complex compound is dispersed internally in a binder resin, and forming the toner in a specific shape. CONSTITUTION: Toner particles are prepared in such a way that azo ferro- complex compound as expressed by the formula beside is dispersed internally in a binder resin, in which also a pigment is dispersed, and also inorganic fine powder is provided, wherein the shape factors S-1 and SF-2 of the toner are conditioned as 110 =St+1.5+1.5 should be met, where Sb and St are the specific surface area in m /cm per unit volume of toner, the former being the measurement acquired by BET method and the latter being the calculation obtained upon assumption that it is a genuine sphere. In the formula, X1 and X2 are hydrogen atom, lower alkyl radical, etc., R1 and R3 are hydrogen atom, alkyl radical, etc., R2 and R4 are hydrogen atom, nitro radical, m, m', n, n' are integer 1 to 3, and A is cation ion.

8. 发明专利

JPH09134070A IMAGE FORMING METHOD 失效
公开(公告)号：JPH09134070A
公开(公告)日：1997-05-20
申请号：JP31583195
申请日：1995-11-10
申请人： CANON KK
发明人： NISHIO YUKI , NOZAWA KEITA
IPC分类号： G03G15/08 , G03G9/08
摘要： PROBLEM TO BE SOLVED: To prevent toner from fusing onto a photoreceptor and to improve fixing performance and offset resistance. SOLUTION: The toner is one having at least binding resin and a low-melting substance which has a melting point 120 deg.C or below, and a latent-image holder 1 is the organic photoreceptor. In a developing process, a voltage for pulling the toner back from the latent-image holder 1 to a toner carrier 9 and a voltage for causing the toner to fly from the toner carrier 9 to the latent-image holder 1 are applied to the toner carrier 9 for the length of time T1 at least one time between the latent-image holder 1 and toner carrier 9 in the developing area of the latent-image holder 1 and toner carrier 9 opposite it. Thereafter a voltage for causing the toner to fly in an image part and pulling the toner back in a non-image part is applied to the toner carrier 9 for the length of time T2 . A T2 /T1 ratio is 0.1 or more.

9. 发明专利

JPH08334960A IMAGE FORMING METHOD 失效
公开(公告)号：JPH08334960A
公开(公告)日：1996-12-17
申请号：JP16707095
申请日：1995-06-09
申请人： CANON KK
发明人： NISHIO YUKI , NOZAWA KEITA
IPC分类号： G03G9/08 , G03G15/06 , G03G15/08 , G03G15/09
摘要： PURPOSE: To provide an image forming method provided with a contact electrifying process capable of obtaining an excellent image having a high density by never or hardly causing the fusing of toner on a photoreceptor. CONSTITUTION: In the image forming method provided with an electrifying process and using the toner incorporating inorganic grains having 0.1 to 5μm average grain size and an electrostatic charge latent image carrier consisting of an organic photoreceptor, in a developing process, voltages for bringing back the toner from the latent image carrier to a toner carrier and for making the toner fly from the toner carrier to the latent image carrier are applied to the toner carrier for time T1 at least once, between the latent image carrier and the toner carrier in a developing region and after that, a voltage in a direction where the toner is made to fly to an image part and brought back into an nonimage part, is applied to the toner carrier for time T2 . Further, the ratio of the time T1 to the time T2 , T2 /T1 is >=0.1.

10. 发明专利

JPH08272133A TONER AND IMAGE FORMING METHOD 失效
公开(公告)号：JPH08272133A
公开(公告)日：1996-10-18
申请号：JP9416795
申请日：1995-03-29
申请人： CANON KK
发明人： URAWA MOTOO , KUKIMOTO TSUTOMU , NOZAWA KEITA , YOSHIDA SATOSHI , NISHIO YUKI
IPC分类号： G03G9/08 , G03G9/083 , G03G15/08
摘要： PURPOSE: To provide a toner by which excellent toner image transfer efficiency is provided, a remaining toner after a transfer is reduced, and a high quality image can be obtained. CONSTITUTION: In a toner consisting of toner grain, in which a coloring agent is dispersed in a binding resin at least, and inorganic fine powder, a liquid lubricant is contained, a toner shape factor SF-1 measured by a toner image analysis device is 110 /cm ), which is measured by a BET method, per a unit volume and a specific surface area St (m /cm ), which is found from a weight average grain diameter on the assumption that the toner is a right sphere, per a unit volume satisfies such conditions as 0

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