JPS5964864A - Developing method - Google Patents
Developing methodInfo
- Publication number
- JPS5964864A JPS5964864A JP17513782A JP17513782A JPS5964864A JP S5964864 A JPS5964864 A JP S5964864A JP 17513782 A JP17513782 A JP 17513782A JP 17513782 A JP17513782 A JP 17513782A JP S5964864 A JPS5964864 A JP S5964864A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnetic toner
- particle size
- development
- weight average
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 48
- 238000011161 development Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 description 6
- 108091008695 photoreceptors Proteins 0.000 description 6
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- CJPQIRJHIZUAQP-MRXNPFEDSA-N benalaxyl-M Chemical compound CC=1C=CC=C(C)C=1N([C@H](C)C(=O)OC)C(=O)CC1=CC=CC=C1 CJPQIRJHIZUAQP-MRXNPFEDSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/06—Developing
- G03G13/08—Developing using a solid developer, e.g. powder developer
- G03G13/09—Developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電子写真記録装置等の現像方法に係り、更に詳
しくは一成分現像剤を用いた現像でトナー補給に改良を
行なった現像方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing method for electrophotographic recording apparatuses, etc., and more particularly to a developing method using a one-component developer with improved toner replenishment.
電子写真記録装置等にあっては、Ｓｅ 、 ＺｎＯ等の
像支持体上に静電潜像を形成し、これケ現像してトナー
像としたのち、このトナー像を記録紙上に転写・定着す
ることがなされている。In electrophotographic recording devices, an electrostatic latent image is formed on an image support such as Se or ZnO, this is developed to form a toner image, and then this toner image is transferred and fixed onto recording paper. Things are being done.
この現像には磁性材料・着色剤・樹脂からなる一成分系
の磁性トナーを用いる現像方法と、着色剤・樹脂のトナ
ーと鉄粉等のキャリヤとの混合物による二成分現像剤を
用いる現像方法とに大別される。本発明は前者の一成分
系の磁性トナーを用いた現像方法に関するものである。There are two types of development methods: one uses a one-component magnetic toner consisting of a magnetic material, a colorant, and a resin, and the other uses a two-component developer consisting of a mixture of a colorant/resin toner and a carrier such as iron powder. It is broadly divided into The present invention relates to the former developing method using a one-component magnetic toner.
像支持体上の静電潜像を磁性トナーにより現像する場合
、一般には特開昭５２−９８５３０号公報にも開示され
ているような磁気ブラシ現像法が賞月されており、かか
る現像方法において磁性トナーは磁気力により現像領域
に搬送されて像支持体に接触現像される。When developing an electrostatic latent image on an image support with a magnetic toner, a magnetic brush developing method as disclosed in Japanese Patent Application Laid-Open No. 52-98530 is generally preferred. The magnetic toner is conveyed to the development area by magnetic force and is developed in contact with the image support.
この磁気ブラシ現像法を用いた磁性トナーの現像にあた
っては、磁性トナーの粒径が良質の画像を得るための大
きなファクターとなっている。トナー粒子はある粒度分
布をもっているが、実験によれば分布をもった大粒径粒
子が１０μｍ以下の特に５μ以下のときはカプリが多く
、２５μｍ以上特に３０μｍ以上の場合画像アレが生じ
る。これは磁性トナーのうち大粒径のものは磁気力の作
用を比較的に強（うけ、現像スリーブ表面により強（吸
着されている。小粒径のものはこれに反してｆ？気力の
作用が弱く現像スリーブ表面に弱く吸着されているため
、優先して静電荷像面に吸着され、可視像の形成ばかり
でなく、カブリ発生の原因と７ｔｃっている。また同じ
理由によって磁性トナーは小粒径のトナーが選択的に現
像される。したがって重量平均粒径はスタート時よりも
多数枚現像後（Ｃは太き（なる傾向にある。ここで重量
平均粒径とは（粒径−重量）分布の中央値粒径のことで
、当該中央値粒径より小なる粒子群の重量と大なる粒子
群の重量とが等しくなるように定められ、例えばコール
タ−エレクトロニクス社製のコールタ−カウンターＭｏ
ｄｅｌ ＴＡ Ｕ型によって測定される。When developing magnetic toner using this magnetic brush development method, the particle size of the magnetic toner is a major factor in obtaining a good quality image. Toner particles have a certain particle size distribution, but experiments have shown that when large particles with a distribution have a size of 10 μm or less, especially 5 μm or less, there are many capri, and when they have a size of 25 μm or more, especially 30 μm or more, image distortion occurs. This is because magnetic toner with large particle size has a relatively strong magnetic force and is strongly attracted to the surface of the developing sleeve. Since the toner is weakly adsorbed to the surface of the developing sleeve, it is preferentially adsorbed to the electrostatic image surface, which not only forms a visible image but also causes fogging.Furthermore, for the same reason, magnetic toner Toner with a small particle size is selectively developed. Therefore, the weight average particle size tends to become larger (C is thicker) after developing a large number of sheets than at the start.Here, the weight average particle size is (particle size - This refers to the median particle size of a particle size distribution, which is determined so that the weight of a particle group smaller than the median particle size is equal to the weight of a particle group larger than the median particle size. Mo
Measured by del TA U type.
以上述べたことは、スタート時と多数枚現像後とではコ
ピー品質が変化することを示している。The above description shows that the copy quality changes between the start and after developing a large number of sheets.
従来スタート時に良好なコピー画像が得られるような重
量平均粒径の磁性トナーを用いたときは多数枚現像後に
は画像アレが生じて（る。逆にスタート時にややカブリ
が生じろような重量平均粒径（−
の磁性トナーを用いたときは多数枚現像後にはカブリが
消えるような傾向にあった。Conventionally, when using a magnetic toner with a weight average particle size that allows a good copy image to be obtained at the start, image distortion occurs after developing a large number of sheets. When a magnetic toner with a particle size of (-) was used, the fog tended to disappear after a large number of sheets were developed.
本発明は現像スタート時にも多数枚現像後にも共にカブ
リや画像アレのない安定した良好な画像が得られるよう
な現像方法を提供することを目的としたもので、上記目
的はスタート現像用磁性トナーに当該磁性トナーより小
粒径の補給用磁性トナーを補給して現像することを特徴
とする現像方法により達成される。An object of the present invention is to provide a developing method that can obtain stable and good images without fogging or image distortion both at the start of development and after developing a large number of sheets. This is achieved by a developing method characterized by replenishing replenishing magnetic toner having a smaller particle size than the magnetic toner.
即ち本発明は従来の現像上のドラフルを解決１−ろため
のもので、スタート時大粒径の磁性トナー、好ましくは
重量平均粒径１０〜３０μｍの磁性トナーで現像し、現
像中のスタート現像剤の粒径分布の変化を修正′ｆる形
で小粒径の磁性トナー、好ましくは重量平均粒径５〜２
５μｍであって前記スタート時の大粒径磁性トナーとの
粒径差が１〜６μｍであるような磁性トナーを補給する
ようにし、はぼ一定の粒径の現像剤組成で長期に亘り現
像を進行せしめるようにしたものである。That is, the present invention is intended to solve the conventional development process using a magnetic toner having a large particle size at the start, preferably a magnetic toner having a weight average particle size of 10 to 30 μm. A magnetic toner with a small particle size, preferably a weight average particle size of 5 to 2, is used to correct changes in the particle size distribution of the agent.
By replenishing magnetic toner with a particle size of 5 μm and a particle size difference of 1 to 6 μm from the large particle size magnetic toner at the start, development is carried out over a long period of time with a developer composition having an approximately constant particle size. It was designed to move forward.
以下図面によって本発明の詳細な説明を行なう。The present invention will be explained in detail below with reference to the drawings.
４ 一
実施例−１
スチレン・ブチルメタクリレート・メチルメタクリレー
ト共重合体（共重合比５：３：２） ４０部
Ｆｅ３０４（四・三酸化鉄〕５５部
スチレン・ブタジェン共重合体
（共重合比８：２）５部
カーボンブラック（着色剤） ２部ニグロシ
ン染料（荷電制御剤） １部ポリプロピレン６
６０Ｐ（三洋化成社製オフセット防市剤）５部
上記組成物を混合・溶融・練肉・冷却・粉砕・分級し、
重量平均粒径１７３μｍの磁性トナーを得た。この磁性
トナー２５０ｇをＵＢｉｘ−ＴＯ写万機小西六写真工業
株式会社判品）の改造現像器に充填し、これと同じトナ
ー’＆）ナー補給器より連続的に補給するようにした。4 Example-1 Styrene/butyl methacrylate/methyl methacrylate copolymer (copolymerization ratio 5:3:2) 40 parts Fe304 (tetrairon trioxide) 55 parts Styrene/butadiene copolymer (copolymerization ratio 8: 2) 5 parts carbon black (colorant) 2 parts nigrosine dye (charge control agent) 1 part polypropylene 6
5 parts of 60P (offset anti-city agent manufactured by Sanyo Chemical Co., Ltd.) The above composition was mixed, melted, kneaded, cooled, crushed, and classified.
A magnetic toner having a weight average particle size of 173 μm was obtained. 250 g of this magnetic toner was filled into a modified developing device manufactured by UBix-TO Shamanki Konishiroku Photo Industry Co., Ltd.) and continuously replenished from the same toner replenisher.
図はこの実施例に用いた装置の構成を示したものである
。図において１は電子写真感光体のドラムで、矢印方向
に回転しＺｎＯ感光体を用いている。The figure shows the configuration of the apparatus used in this example. In the figure, reference numeral 1 denotes an electrophotographic photoreceptor drum, which rotates in the direction of the arrow and uses a ZnO photoreceptor.
現像器２内には磁性トナーがあって、固定した磁 ５−
石３を内包した磁気ブラシロール５周面に磁性トナーは
付着し、磁鰭ブラシロール５の回転によって磁性トナー
の付着量が穂立規制板４によって規制されながら搬送さ
れて感光体１に最も近接した現像域Ａにいたり、感光体
１上の静電潜像を現像する。ここで一部の磁性トナーは
感光体１上に付着し、付着しなかった磁性トナーは磁気
ブラシロール５に付着したまま回転し、現像後の磁性ト
ナーを掻き取るスクレーパ６によって掻き落され、掻き
取られた磁性トナーは回転羽根車７によって現像器２内
の磁性トナーと攪拌されて再び現像に用いられろ。８は
トナー補給器で、トナー補給器８には補給器用磁性トナ
ーＴＢを内蔵し、現像に伴う現像器２内の磁性トナーの
減少を適宜補給する。There is magnetic toner in the developing device 2, and the magnetic toner adheres to the circumferential surface of a magnetic brush roll 5 containing a fixed magnet 5-stone 3, and as the magnetic fin brush roll 5 rotates, the amount of magnetic toner adhered to the magnetic toner increases. It is conveyed while being regulated by the vertical regulation plate 4 and reaches the developing area A closest to the photoreceptor 1, where the electrostatic latent image on the photoreceptor 1 is developed. Here, some of the magnetic toner adheres to the photoreceptor 1, and the magnetic toner that does not adhere to the magnetic brush roll 5 rotates while remaining attached to it, and is scraped off by the scraper 6 that scrapes off the magnetic toner after development. The removed magnetic toner is stirred with the magnetic toner in the developing device 2 by the rotary impeller 7 and used again for development. Reference numeral 8 denotes a toner replenisher. The toner replenisher 8 has a built-in magnetic toner TB for replenisher use, and appropriately replenishes the amount of magnetic toner in the developing device 2 that is decreased due to development.
トナー補給器８内の補給用磁性トナーＴＢに対して、ス
タート時の現像器２内にはスタート現像用磁性トナーＴ
Ａがある。In contrast to the magnetic toner TB for replenishment in the toner replenisher 8, the magnetic toner T for start development is in the developing device 2 at the time of start.
There is an A.
まずスタート現像用磁性トナーＴＡも補給用磁性トナー
ＴＢも前記の同じトナーとし、トナー補給器８より連続
的にＢ４サイズ１枚当り約６０即に相当丁 ６−
る量を補給するようＩｃ ＋、、て、２５００枚、５０
０ Ｑ枚、１００００枚、１５００ｒ１枚、２００（ｌ
ｆ１枚までＢ４サイズの線画潜像を現像し、磁性トナー
の重量平均粒径乃び画質の変化を調べた。画質は画像の
アレ、解像力等を比較し、○ｐ好、△劣ろ、Ｘ悪いの３
段階の評価をした。第１表はこの結果を示す。First, the magnetic toner TA for start development and the magnetic toner TB for replenishment are the same toners mentioned above, and the toner replenisher 8 continuously replenishes the amount equivalent to about 60 per B4 size sheet. ,te,2500 pieces,50
0 Q pieces, 10000 pieces, 1500r1 piece, 200(l
B4 size line latent images were developed up to f1 sheets, and changes in the weight average particle diameter and image quality of the magnetic toner were investigated. For image quality, compare the image quality, resolution, etc., and rate it as ○p good, △poor, or X bad.
I gave a graded evaluation. Table 1 shows the results.
第 １ 表
次にトナー補給器８には、前記処方と同じであるが重量
平均粒径１２３μｍのトナーを補給用磁性トナーＴＢと
して充填し、コピースタートと共に前記の割合でトナー
を補給しながら現像したと七の重量平均粒径の測定及び
画質の評価を行なった。Table 1 Next, the toner replenisher 8 was filled with toner having the same formulation as above but with a weight average particle size of 123 μm as replenishing magnetic toner TB, and development was carried out while replenishing the toner at the above ratio at the start of copying. The weight average particle diameter and image quality of the samples were measured and the image quality was evaluated.
第２表はその結果を示す。Table 2 shows the results.
７−
第 ２ 表
第１表およびｍ２表を比較することにより、本発明の効
果が十分間められた。7-Table 2 By comparing Table 1 and Table m2, the effect of the present invention was sufficiently determined.
実施例−２
前記実施例−１と同処方で重量平均粒径１６．５μｍの
トナーと１３．３ｔｒｆｎθ）トナーを作成した。Example 2 A toner with a weight average particle diameter of 16.5 μm and a toner with a weight average particle size of 13.3 trfnθ) were prepared using the same formulation as in Example 1.
まずスタート現像用磁性トナーＴＡも補給用磁性トナー
′１゛Ｂも共に１６．５μｍのトナーを用い、トナー補
給器８からは５分母に約２７ｙ宛のトナーを補給１７な
がら連続コピーを行なった。他は実施例−１と同様にし
て重量平均粒径の測定及び画質の評価を行なった。第３
表はこの結果ケ示す。First, both the magnetic toner TA for start development and the magnetic toner '1'B for replenishment were 16.5 μm toner, and continuous copying was performed while replenishing 17 the toner for about 27y in the 5th denominator from the toner replenisher 8. The weight average particle diameter was otherwise measured and the image quality was evaluated in the same manner as in Example-1. Third
The table shows the results.
−８−′≦シ
第 ３ 表
ついで、スタート現像用磁性トナーＴＡには同じ１６．
５μｍのトナーを用い、補給用磁性トナーＴＨには前記
１３．３ Ｊｉｍのトナーを用い、同様のテストン行な
い重量平均粒径の測定及び画質の評価を行なった。第４
表にはその結果を示す。-8-'≦C Table 3 Next, the magnetic toner TA for start development has the same 16.
Using a toner of 5 .mu.m and using the above-mentioned toner of 13.3 .mu.m as the replenishing magnetic toner TH, the same teston test was carried out to measure the weight average particle diameter and evaluate the image quality. Fourth
The table shows the results.
第４表
９ 一
実施例−３
スチレン・ブキルメタクリレート
共卸合体（＃重合比Ｒ： ２ ） ４５部
Ｆｅ、０．（四・三酸化鉄）５５〃
カーボンブラツク（着色剤） ２〃ニグロシ
ン染料（荷電制御剤） １〃ポリプロピレン６
６（ｌ Ｐ （オフセット防止剤）５Ｎ上記組成物を混
合・溶融・練肉・冷却・粉砕・分級し、重量平均粒径１
７５μｍの磁性トナーを得た。この磁性トナー２５０９
をＵ−Ｂｉｘ −Ｔ複写機の改造現像器に充填し、２５
００枚コピー毎に前記磁８７５０枚、：＋−０（Ｊ （
１０枚まで８４サイズの線画潜像を現像し、上記各枚数
ごとの現像部の磁性トナーの重量平均粒径及び画質の変
化ケ実流側−１の方法で調べ第５表に示した。Table 4 9 Example-3 Styrene/butyl methacrylate co-polymerization (#polymerization ratio R: 2) 45 parts Fe, 0. (Tetrairon trioxide) 55 Carbon black (coloring agent) 2 Nigrosine dye (charge control agent) 1 Polypropylene 6
6 (l P (offset inhibitor) 5N The above composition was mixed, melted, kneaded, cooled, crushed, and classified, and the weight average particle size was 1.
A magnetic toner of 75 μm was obtained. This magnetic toner 2509
was charged into the modified developing device of the U-Bix-T copying machine, and 25
For every 00 sheets copied, the magnetic 8750 sheets, :+-0(J (
Line latent images of 84 sizes were developed up to 10 sheets, and the changes in the weight average particle diameter and image quality of the magnetic toner in the developing section for each number of sheets were investigated using the method in Flow-1 and are shown in Table 5.
次に＠紀現像器にスタート磁性トナーとして重１０−
が、重量平均粒径１２．７μｍの補給磁性トナー１５０
μを重ねて充填（，１，１２５０枚、２５ （１０枚ｆ
で現像し、２５０１枚コピ一時補給用ホンパー８に収容
された補給用磁性トナーＴＢ１５ｒｌ ９を１時に補給
し、以後同様に（−で２５００枚コピー毎に１時に補給
用磁性トナーを補給しつづけて１０００（１枚まで＠Ｈ
し、上紀各枚数ごとの現像部の磁性トナーのＶ骨子均粒
径及び画質の変化を同様にして楯べ第５表に示した。Next, the starting magnetic toner was placed in the @ki developing device, and the replenishing magnetic toner 150 mm had a weight average particle size of 12.7 μm.
Stack μ (1,1250 sheets, 25 (10 sheets f
Develop the magnetic toner TB15rl 9 stored in the temporary replenishment pumper 8 for 2501 copies at 1 o'clock and replenish the magnetic toner TB15rl 9 at 1 o'clock.From then on, continue to replenish the magnetic toner at 1 o'clock for every 2500 copies with -. 1000 (up to 1 piece @H
Table 5 also shows changes in the average particle diameter of the V-frame and the image quality of the magnetic toner in the developing section for each number of sheets.
第 ５ 表
第１表〜第５表を比較することにより、本発明の効果が
＋ｌＩ＋認められた。Table 5 By comparing Tables 1 to 5, the effects of the present invention were confirmed.
また第１、第２及び第３の実施例からスタート現像用磁
性トナーＴＡとして重量平均粒径１０〜３０μｎｔ、補
給用磁性トナーＴＢとして重量平均粒径５〜２５μｍで
あると、２０００＋１枚程度σ）コピーについて継続し
て曳好な画質グ）コピーが得られることが明らかとノ「
つた。Starting from the first, second, and third embodiments, if the developing magnetic toner TA has a weight average particle size of 10 to 30 μnt, and the replenishment magnetic toner TB has a weight average particle size of 5 to 25 μm, approximately 2000 + 1 sheet σ) It is clear that copies with consistently good image quality can be obtained.
Ivy.
図は本発明の実施例に用いた現像装置の構成を示す。
１・・・電子８真感光体、２・・・現像器、５・・・磁
気ブラシロール、８・・・トナー補給器、ＴＡ・・・ス
タート現像用磁性トナー、ＴＢ・・・補給用磁性トナー
。
代理人 桑 原 義 美The figure shows the configuration of a developing device used in an example of the present invention. DESCRIPTION OF SYMBOLS 1... Electronic 8 true photoreceptor, 2... Developing device, 5... Magnetic brush roll, 8... Toner replenisher, TA... Magnetic toner for start development, TB... Magnetic for replenishment toner. Agent Yoshimi Kuwahara
Claims (2)
より小粒径の補給用磁性トナーを補給して現像すること
を特徴とする現像方法。(1) A developing method characterized in that development is carried out by replenishing a magnetic toner for start development with a replenishing magnetic toner having a smaller particle size than the magnetic toner.
が１０〜３０μｍであり、前記補給用磁性トナーの重量
平均粒径が５〜２５μｍである特許請求の範囲第１項記
載の現像方法。(2) The developing method according to claim 1, wherein the start development magnetic toner has a weight average particle size of 10 to 30 μm, and the replenishment magnetic toner has a weight average particle size of 5 to 25 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17513782A JPS5964864A (en) | 1982-10-04 | 1982-10-04 | Developing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17513782A JPS5964864A (en) | 1982-10-04 | 1982-10-04 | Developing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5964864A true JPS5964864A (en) | 1984-04-12 |
Family
ID=15990932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17513782A Pending JPS5964864A (en) | 1982-10-04 | 1982-10-04 | Developing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5964864A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220765A (en) * | 1983-05-31 | 1984-12-12 | Mita Ind Co Ltd | Improvement of magnetic brush developing method |
| EP0248119A1 (en) * | 1986-06-02 | 1987-12-09 | Agfa-Gevaert N.V. | Improved method for the development of electrostatic images |
-
1982
- 1982-10-04 JP JP17513782A patent/JPS5964864A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220765A (en) * | 1983-05-31 | 1984-12-12 | Mita Ind Co Ltd | Improvement of magnetic brush developing method |
| JPH058430B2 (en) * | 1983-05-31 | 1993-02-02 | Mita Industrial Co Ltd | |
| EP0248119A1 (en) * | 1986-06-02 | 1987-12-09 | Agfa-Gevaert N.V. | Improved method for the development of electrostatic images |
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