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公开(公告)号：DE69506811T2
公开(公告)日：1999-08-05
申请号：DE69506811
申请日：1995-08-24
Applicant: MITA INDUSTRIAL CO LTD
Inventor： INOUE MASAHIDE , ARAKAWA TAKESHI , ASO YUTAKA , FUJISAWA RYO , KATO MAMORU
Abstract: The present invention relates to a recycle developing process which comprises developing an electrostatic image formed on a photosensitive material with a starting developer filled in a developing vessel, transferring the toner image to a predetermined paper, recovering the toner remaining on the photosensitive material by a cleaning means, and repeating the developing procedure while replenishing a virgin toner and the toner recovered by the cleaning means into the developing vessel; wherein the virgin toner to be replenished into the developing vessel is that which is fulfilled in a container wherein a rotating roller is provided in an opening portion at a lower portion has a flowability, shown as a fallen amount of the toner at a time of falling via the rotating roller for a certain fixed time, of 50 to 70 % based on the toner in the starting developer. According to this process, an abrupt decrease in the properties of the developer due to the mixing of the recovered toner can be relaxed. As a result, a stable image free from fogging or toner scattering can be formed by the recycle developing process.
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公开(公告)号：DE69506811D1
公开(公告)日：1999-02-04
申请号：DE69506811
申请日：1995-08-24
Applicant: MITA INDUSTRIAL CO LTD
Inventor： INOUE MASAHIDE , ARAKAWA TAKESHI , ASO YUTAKA , FUJISAWA RYO , KATO MAMORU
Abstract: The present invention relates to a recycle developing process which comprises developing an electrostatic image formed on a photosensitive material with a starting developer filled in a developing vessel, transferring the toner image to a predetermined paper, recovering the toner remaining on the photosensitive material by a cleaning means, and repeating the developing procedure while replenishing a virgin toner and the toner recovered by the cleaning means into the developing vessel; wherein the virgin toner to be replenished into the developing vessel is that which is fulfilled in a container wherein a rotating roller is provided in an opening portion at a lower portion has a flowability, shown as a fallen amount of the toner at a time of falling via the rotating roller for a certain fixed time, of 50 to 70 % based on the toner in the starting developer. According to this process, an abrupt decrease in the properties of the developer due to the mixing of the recovered toner can be relaxed. As a result, a stable image free from fogging or toner scattering can be formed by the recycle developing process.
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公开(公告)号：DE3014211A1
公开(公告)日：1980-10-23
申请号：DE3014211
申请日：1980-04-14
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , MATSUMOTO SHOJI , AIZAWA TATSUO
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公开(公告)号：AU3985778A
公开(公告)日：1980-03-20
申请号：AU3985778
申请日：1978-09-14
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , YAMAURA SUSUMU , KAMEZAWA YASUTOKI , AIZAWA TATSUO
Abstract: A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) 100 parts by weight of thermoplastic acrylic-styrene copolymer and (B) 10 to 100 parts by weight of dry method finely divided silica is disclosed. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency without broadening of contours of the image. This transfer sheet has feel and touch quite similar to those of ordinary paper and is very excellent in graphic characteristics.
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公开(公告)号：AU3543778A
公开(公告)日：1979-11-01
申请号：AU3543778
申请日：1978-04-26
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , YAMAURA SUSUMU , KAMEZAWA YASUTOKI , AIZAWA TATSUO
IPC: G03G7/00
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Patent Agency Ranking
公开(公告)号：CA1131974A
公开(公告)日：1982-09-21
申请号：CA311235
申请日：1978-09-13
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , YAMAURA SUSUMU , KAMEZAWA YASUTOKI , AIZAWA TATSUO
Abstract: A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a paper substrate and a toner-receiving layer formed on at least one surface of the substrate, said tonerreceiving layer consisting essentially of a composition comprising (A) 100 parts by weight a thermoplastic acrylicstyrene copolymer having an acid value from 10 to 170 and (B) 10 to 100 parts by weight of finely divided fumed silica is disclosed. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency without broadening of contours of the image. This transfer sheet has feel and touch quite similar to those of ordinary paper and is very excellent in graphic characteristics.
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公开(公告)号：AU523106B2
公开(公告)日：1982-07-15
申请号：AU3985778
申请日：1978-09-14
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , YAMAURA SUSUMU , KAMEZAWA YASUTOKI , AIZAWA TATSUO
Abstract: A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) 100 parts by weight of thermoplastic acrylic-styrene copolymer and (B) 10 to 100 parts by weight of dry method finely divided silica is disclosed. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency without broadening of contours of the image. This transfer sheet has feel and touch quite similar to those of ordinary paper and is very excellent in graphic characteristics.
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公开(公告)号：DE2844691A1
公开(公告)日：1979-04-26
申请号：DE2844691
申请日：1978-10-13
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , YAMAURA SUSUMU , HIRAKATA OSAKA , KAMEZAWA YASUTOKI , AIZAWA TATSUO
Abstract: A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) 100 parts by weight of thermoplastic acrylic-styrene copolymer and (B) 10 to 100 parts by weight of dry method finely divided silica is disclosed. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency without broadening of contours of the image. This transfer sheet has feel and touch quite similar to those of ordinary paper and is very excellent in graphic characteristics.
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公开(公告)号：DE3786135D1
公开(公告)日：1993-07-15
申请号：DE3786135
申请日：1987-09-28
Applicant: MITA INDUSTRIAL CO LTD
Inventor： KATO MAMORU , MAEKAWA KOUJI , MATSUNOBU KENICHI , FUJIE NAOKA , HAZAMA HIROYUKI
Abstract: A two-component type developer comprising an electroscopic fixable toner containing, as the coloring pigment, carbon black having a coloring power of 100 to 120 and a magnetic carrier is used for developing electrostatic latent images formed on a photosensitive plate (1) in correspondence to an imitation original (1b) and an original (1a), and the image density of the toner image corresponding to the imitation original is detected and the toner concentration in the developer is controlled based on the detected image density. According to this development process, the toner concentration in the developer can be maintained within an optimum range based on the optical density of the toner image (1b) formed on the photosensitive plate (1) in correspondence to the imitation original.
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公开(公告)号：DE3473656D1
公开(公告)日：1988-09-29
申请号：DE3473656
申请日：1984-06-27
Applicant: MITA INDUSTRIAL CO LTD
Inventor： MAEKAWA KOUJI , KATO MAMORU , NAKAGAMA SYOJI , SANO YUMIKO
Abstract: An electrophotographic method for the formation of two-colored images comprising: (1) uniformly charging the surface of a photoreceptor having a conductrive substance and a photoconductive layer formed on the conductive substance, said photoconductive layer being sensitive to a first color, (2) exposing a two-colored original, to form on said photoconductive layer an electrostatic latend image, which corresponds to a second color region in the original, with the same polarity as the electric charges on the surface of said photoconductive layer, (3) subjecting the surface of said photoreceptor to a reversal development treatment by the use of a photoconductive color toner charged with the same polarity as the electric charges constituting said electrostatic latent image, to develop the non-charged region with the photoconductive color toner, (4) subjecting said electrostatic latent image to a normal development treatment by the use of an insulative toner having a color different from the color of said photoconductive color toner, and (5) charging the color toners on said photoconductive layer with a different polarity from the charging polarity in process (1) and simultaneously exposing said original through a filter shielding against said first color, thereby providing a practical method for the formation of a desired two colored distinct image corresponding to the original.
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