JPS6338970A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPS6338970A JPS6338970A JP18197686A JP18197686A JPS6338970A JP S6338970 A JPS6338970 A JP S6338970A JP 18197686 A JP18197686 A JP 18197686A JP 18197686 A JP18197686 A JP 18197686A JP S6338970 A JPS6338970 A JP S6338970A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- wall surface
- gap
- hopper
- carrier
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000010410 layer Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、現像剤担持体上に供給された一成分現像剤を
規制部材により所定の厚さで電荷を有した現像剤層とし
、この現像剤層を静電潜像保持体上の静電潜像に搬送し
て静電吸着して可視像に現像する現像装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to forming a monocomponent developer supplied onto a developer carrier into a charged developer layer with a predetermined thickness by means of a regulating member. The present invention relates to a developing device that conveys a layer to an electrostatic latent image on an electrostatic latent image carrier and electrostatically attracts it to develop it into a visible image.
従来の技術
静電潜像保持体上に形成された静電潜像を現像する現像
装置としては、トナーとキャリヤーとから成る二成分現
像剤を使用し、キャリヤーとの摩擦帯電によりトナーに
電荷を与えて帯電されたトナーな静電潜像に静電吸着さ
せる二成分現像剤を用いた現像装置が知られている。Prior Art A developing device for developing an electrostatic latent image formed on an electrostatic latent image holder uses a two-component developer consisting of toner and a carrier, and charges the toner by frictional charging with the carrier. 2. Description of the Related Art A developing device using a two-component developer that is electrostatically attracted to a charged toner electrostatic latent image is known.
とのよ５な二成分現像剤を用いた現像装置は充分に実用
に耐え得るものであるが、最近になって現像剤劣化防止
の観点からトナーのみから成る一戒分現像剤を使用した
現像装置が提案されるようになってきた。A developing device using a two-component developer of 50% is sufficiently practical, but recently, from the viewpoint of preventing deterioration of the developer, a developing device using a single-component developer consisting only of toner has been developed. devices have been proposed.
このような−成分現像剤を用いる現像装置としては、磁
性現像剤を使用するもの、非磁性現像剤を使用するもの
、或いは現像剤を静電潜像保持体に接触させるものと非
接触のものがある。Development devices using such -component developers include those that use magnetic developers, those that use non-magnetic developers, those that bring the developer into contact with the electrostatic latent image carrier, and those that do not. There is.
例えば、特開昭６０−５３９７５号公報に開示されてい
る一成分現像剤を用いる現像装置が知られている。For example, a developing device using a one-component developer disclosed in Japanese Patent Laid-Open No. 60-53975 is known.
この現像装置は第２図に示すように、静電潜像保持体１
と対向して現像剤担持体２と現像剤供給部材３をホッパ
ー４内に設けると共に、現像剤担持体２０表面に規制部
材５を圧接したものであり、詳しくは静電潜像保持体１
０表面に表面電位およそ２００〜９００Ｖ有した静電潜
像６を有し、現像剤担持体２は現像電極７上に厚さ１＋
ｏ＋、比抵抗Ｉ Ｘ Ｉ ０１０Ω３、比誘電率３．０
であるカーボン及びグラスファイバー等を添加したフェ
ノール製の被覆層８を設けたもので、静電潜像保持体１
に間隙１００〜４００μｍを有して対向しであると共に
、その現像剤担持体２の表面、つまり被覆層８０表面は
軸方向に研磨されて表面粗さがＲ２で１〜１０μｍとな
っている。As shown in FIG. 2, this developing device includes an electrostatic latent image holding body 1
A developer carrier 2 and a developer supply member 3 are provided in a hopper 4 facing the developer carrier 20, and a regulating member 5 is pressed against the surface of the developer carrier 20.
The developer carrier 2 has an electrostatic latent image 6 on its surface with a surface potential of about 200 to 900 V, and the developer carrier 2 has a thickness of 1+ on the developing electrode 7.
o+, specific resistance I X I 010Ω3, relative dielectric constant 3.0
The electrostatic latent image carrier 1 is provided with a coating layer 8 made of phenol to which carbon, glass fiber, etc. are added.
are opposed to each other with a gap of 100 to 400 μm, and the surface of the developer carrier 2, that is, the surface of the coating layer 80, is polished in the axial direction to have a surface roughness of 1 to 10 μm in R2.
現像剤供給部材３は現像剤担持体２にニップ圧が１瓢で
圧接して矢印方向に現像剤担持体２と同一速度で回転し
てホッパー４内の現像剤９を現像剤担持体２上に供給す
るもので、圧接時に現像剤担持体２上に加わる荷重を小
さくするためにシャフト（０上にウレタン等の発泡体１
１を巻装して表面に厚さ０．５〜１瓢のＥＰＤＭゴム等
の被覆層１２を形成したものとなり、その被覆層１２０
表面は高さ約２００μｍ１１５°の等間隔で凸凹が設け
てあって、その凹部に埋まった現像剤を現像剤担持体２
上に送るようにしである。The developer supplying member 3 contacts the developer carrier 2 with a nip pressure of 1 g, rotates in the direction of the arrow at the same speed as the developer carrier 2, and transfers the developer 9 in the hopper 4 onto the developer carrier 2. A foam material such as urethane 1 is placed on the shaft (0) to reduce the load applied to the developer carrier 2 during pressure contact.
1 is wound, and a coating layer 12 of EPDM rubber or the like with a thickness of 0.5 to 1 ounce is formed on the surface, and the coating layer 120
The surface has irregularities of approximately 200 μm in height and at equal intervals of 115°, and the developer buried in the recesses is transferred to the developer carrier 2.
It should be sent upwards.
そして、送られた現像剤９は現像剤担持体２の回転によ
って規制部材５まで送られ、摩擦帯電により現像剤９に
所望の電荷を付与すると同時に所定の厚さく０．３〜１
．０″’／、）の現像剤７省１３を形成し、靜′１潜像
６に向げて搬送される。The developer 9 thus sent is sent to the regulating member 5 by the rotation of the developer carrier 2, and is given a desired charge to the developer 9 by frictional electrification, and at the same time, is thickened to a predetermined thickness of 0.3 to 1.
．． 0″'/, ) developer 7 and 13 are formed and conveyed toward the latent image 6.
前記規制部材５は厚さＯ６ｌ ｗｍのＳＵＳ ３０４
Ｃ３Ｐ８／Ｈのバネ材上に厚さ１１、ゴム硬度５００の
シリコーンゴム材を接着したもので、シリコーンゴム材
中には二酸化ケイ素と二酸化チタンのフィラーが添加さ
れ、そのシリコーンゴム材が現像剤担持体上に圧接して
いると共に、その接触圧は５０〜３００Ｖに設定されて
いる。The regulating member 5 is made of SUS 304 with a thickness of O6lwm.
A silicone rubber material with a thickness of 11 and a rubber hardness of 500 is adhered onto a C3P8/H spring material. Fillers of silicon dioxide and titanium dioxide are added to the silicone rubber material, and the silicone rubber material supports the developer. It is in pressure contact with the body, and the contact pressure is set at 50 to 300V.
前記現像電極７には１００〜４００■の直流電圧にＩ〜
Ｉ ＯＫＨ２，ｖｐ −ｖｐの周波数で４０００〜４５
００ Ｖの高周波交番電圧を重畳した電圧が印加され、
静電潜像保持体１上の静電潜像６部分尤周辺電場を形成
して現像剤層１３を移動させて静電吸着させることで可
袂像に現像する。The developing electrode 7 is supplied with a DC voltage of 100 to 400 cm.
I OKH2, vp - 4000 to 45 at the frequency of vp
A voltage superimposed with a high frequency alternating voltage of 00 V is applied,
An electric field is formed around the 6 portions of the electrostatic latent image on the electrostatic latent image holder 1 to move the developer layer 13 and electrostatically attract it, thereby developing it into a flexible image.
現像剤９は非磁性−成分系の現像剤であり、スチレン幇
脂やアクリル樹脂等の各種熱可塑性樹脂中にカーボンブ
ラック等の顔料が含金属染料等の極性制御剤を分散し、
粉砕、分級によって主体粒度が５〜２０μｍの大きさと
したもので、場合によっては現像剤粒子に対して０．１
〜２．０重量パーセントの範囲で疎水性シリカを添加し
て、現像剤９が現像剤担持体２から静電潜像６への移動
性を高めると共に、極性制御することもある。The developer 9 is a non-magnetic component type developer in which pigments such as carbon black are dispersed in various thermoplastic resins such as styrene resin and acrylic resin, and a polarity control agent such as a metal-containing dye is dispersed.
The main particle size is made into a size of 5 to 20 μm by crushing and classification, and in some cases, the particle size is 0.1 μm to the developer particles.
Hydrophobic silica may be added in a range of 2.0 weight percent to enhance the mobility of the developer 9 from the developer carrier 2 to the electrostatic latent image 6 and to control the polarity.
発明が解決しようとする問題点
かかる現像装置であると、現像剤供給部材３０回転によ
ってホッパー４の底部４ａとの隙間Ｓ１を通って現像剤
９を現像剤担持体２に送るので、前記隙間Ｓ１を０．２
〜２１道度と狭くする必要があり、このために隙間Ｓ１
、つまりホッパー４の底部４ａの壁面上に現像剤９が堆
積して現像剤担持体２に十分なる量の現像剤９を送るこ
とができなくなることがしばしば生ずる。Problems to be Solved by the Invention In this developing device, the developer 9 is sent to the developer carrier 2 through the gap S1 with the bottom 4a of the hopper 4 by 30 rotations of the developer supply member, so that the gap S1 0.2
It is necessary to narrow the gap to ~21 degrees, and for this purpose, the gap S1
That is, the developer 9 often accumulates on the wall surface of the bottom 4a of the hopper 4, making it impossible to send a sufficient amount of the developer 9 to the developer carrier 2.
このよ５に、現像剤担持体２に十分なる量の現像剤９を
送れないと、広面積のベタ黒画像をコピーした場合均一
なベタ黒画像が得られない。5. If a sufficient amount of the developer 9 is not sent to the developer carrier 2, a uniform solid black image cannot be obtained when a wide area solid black image is copied.
そこで、本発明はホッパーの底部と現像剤供給部材との
隙間に現像剤が堆積しないよってして常に現像剤担持体
に十分なる量の現像剤を送ることができるようにするこ
とを目的とするものである。Therefore, an object of the present invention is to prevent the developer from accumulating in the gap between the bottom of the hopper and the developer supply member, so that a sufficient amount of developer can always be sent to the developer carrier. It is something.
問題点を解決するための手段及び作用
現像剤供給部材とホッパーの底部との隙間を通して現像
剤を現像剤担持体に送ると共に、規制部材で現像剤担持
体上に現像剤層を形成する現像装置において、前記ホッ
パーの底部における隙間を形成する壁面を現像剤の帯電
極性と同一極性を有する材料として、現像剤が隙間を通
る際に壁面に静′を江吸着して堆積しないようにしたも
のである。Means and Effects for Solving Problems A developing device that sends developer to a developer carrier through a gap between a developer supply member and the bottom of a hopper, and forms a developer layer on the developer carrier with a regulating member. In this method, the wall surface forming the gap at the bottom of the hopper is made of a material having the same polarity as the charge polarity of the developer, so that when the developer passes through the gap, static electricity is not adsorbed and deposited on the wall surface. be.
実ｊＡ例
ホッパー４は、ＡＢＳ樹脂材によって円筒状の現像剤収
納部２０と現像部材収納部２１とを水平方向に連続して
有し、現像剤収納部２０と現像部材収納部２１とは開口
部２２で連続していると共に、現像剤収納部２１内には
円筒形状で内部に現像剤９が１００〜５００ｆ充填され
た現像剤カートリ少ジ２３が挿入、引き出し自在に設け
られ、先端から０・５〜３０ｍの面巾な有する現像剤送
り出し部材２４を５〜３０ ｒｐｍの速度で回動するこ
とで現像剤９を開口幅が５〜３００簡のスリット開口２
５より開口部２２を通って現像部材収納部２１に送り出
しするようになっている。Practical Example The hopper 4 has a cylindrical developer storage section 20 and a developing member storage section 21 made of ABS resin that are continuous in the horizontal direction. The developer storage section 21 is provided with a cylindrical developer cartridge container 23 that can be freely inserted and pulled out and is filled with 100 to 500 f of developer 9 inside the developer storage section 21. - By rotating the developer delivery member 24 having a surface width of 5 to 30 m at a speed of 5 to 30 rpm, the developer 9 is passed through the slit opening 2 with an opening width of 5 to 300 meters.
5, the developing member is sent out through the opening 22 to the developing member storage section 21.
前記現像部材収納部２１内には現像剤担持体２と現像剤
供給部材３とが相互に圧接して回転自在にそれぞれ配設
され、その現像剤担持体２上に規制部材５が圧接して所
定の厚さで（Ｅｌｉ［荷を有する現像剤層１３を形成す
るようにしてあり、その現像剤層１３が静電潜像保持部
材１の静電潜像６に搬送して静電吸着させて可視像とす
るようにしである。A developer carrier 2 and a developer supply member 3 are rotatably arranged in pressure contact with each other in the developer storage portion 21, and a regulating member 5 is in pressure contact with the developer carrier 2. A developer layer 13 having a charge of (Eli) is formed at a predetermined thickness, and the developer layer 13 is conveyed to the electrostatic latent image 6 of the electrostatic latent image holding member 1 and electrostatically attracted to it. This is done so that it becomes a visible image.
前記現像剤担持体２は直径１３慎のＳＵＳシャフト、つ
まり現像電極７上に肉厚１頷、比抵抗ｌ Ｘ Ｉ ０１
０Ω備、比誘電率３．０であるカーボン及びグラスファ
イバー等を含有したコニノール製パイプ８（被覆層）を
導電接着した外径１５ｍのロール状となり、現像剤供給
部材３は従来と同様にシャフト１０上に発泡体１１を巻
装し、表面に被覆層１２を形成したもので、表面には凸
凹が設けである。The developer carrier 2 is a SUS shaft with a diameter of 13mm, that is, a wall thickness of 1mm on the developing electrode 7, and a specific resistance of lXI01.
It is in the form of a roll with an outer diameter of 15 m and is conductively bonded with a Coninol pipe 8 (coating layer) containing carbon and glass fiber with a dielectric constant of 3.0, and the developer supply member 3 is connected to the shaft as before. A foam 11 is wrapped around a foam 10, and a coating layer 12 is formed on the surface, and the surface is provided with unevenness.
規制部材５はＳＯ２３０４ｃ ｓ ｐＸ Ｋ厚さ０．１
層のバネ材５ａに五酸化バナジウム１重量パーセント含
有したシリコーンゴム５ｂを厚さ１閣のものをｌｏｗ巾
で接着したものとなり、現像剤担持体２の表面に５０〜
３０ｏ／の圧接力で圧接するように設定しである。The regulating member 5 is SO2304c s pX K thickness 0.1
The spring material 5a of the layer is made of a silicone rubber 5b containing 1% by weight of vanadium pentoxide, which has a thickness of 1 inch and is adhered to a low width.
It is set to press with a pressure of 30°/.
前記現像剤担持体２のシャ７ト７には直流電圧−２００
〜−４００ｖに重畳した周波数１〜１０ＫＨ２Ｖｐ−ｖ
ｐが４００〜４５００ Ｖノ高Ｍ［交番を圧が印加され
ており、静電潜像保持体１上の静電潜像６に周辺電場を
形成して現像剤層１３を移動させて現像を行なわせてい
る。A DC voltage of -200 is applied to the shut 7 of the developer carrier 2.
Frequency 1~10KH2Vp-v superimposed on ~-400v
When p is 400 to 4500 V, high M [alternating pressure is applied, a peripheral electric field is formed on the electrostatic latent image 6 on the electrostatic latent image holder 1, and the developer layer 13 is moved to perform development. I'm letting them do it.
前記現像剤担持体２の周速は静電潜像保持体１の周速に
対し１．０〜２．５倍となり、本実施例では＋ｓｏ９
の速度で回動している。The peripheral speed of the developer carrier 2 is 1.0 to 2.5 times the peripheral speed of the electrostatic latent image holder 1, and in this embodiment, +so9
is rotating at a speed of
ｅＣ
前記現像剤供給部材３と対向するホッパー４の底部、つ
まり現像部材収納部２１の底部２１ａは円弧状となって
現像剤供給部材３とにより０．５〜２■の隙間Ｓ１を形
成していると共に、その壁面４′は現像剤９の帯電極性
と同一極性を有する材料より成っている。eC The bottom of the hopper 4 facing the developer supplying member 3, that is, the bottom 21a of the developing member storage section 21, is arcuate and forms a gap S1 of 0.5 to 2 cm with the developer supplying member 3. In addition, the wall surface 4' is made of a material having the same polarity as the charge polarity of the developer 9.
しかして、開口部２２より現像剤供給部材３上に落下し
た現像剤９は壁面４′との間隙Ｓ１で圧縮されて現像剤
供給部材３０表面の凹部に埋め込まれ、現像剤担持体２
の回転によって規制部材５−！で送られて摩擦帯電によ
り現像剤９に■電荷を付与すると同時に現像剤担持体２
上に現像剤９の均一な厚さの現像剤層１３を形成（０，
５〜０６ｇ″′／Ｉ）シて静電潜像６に送られ、静電吸
着して可視像に現像する。The developer 9 that has fallen onto the developer supplying member 3 from the opening 22 is compressed in the gap S1 with the wall surface 4' and is embedded in the recess on the surface of the developer supplying member 30.
Due to the rotation of the regulating member 5-! At the same time, the developer 9 is fed with an electric charge due to triboelectric charging, and the developer carrier 2
A developer layer 13 of uniform thickness of developer 9 is formed on top (0,
5 to 06 g'''/I) and is sent to the electrostatic latent image 6, where it is electrostatically attracted and developed into a visible image.
この現像に使われなかった現像剤９は現像剤担持体２の
回転によってロアシール材２６と現像剤担持体２の間か
らホッパー４の底部、つまり現像部材収納部２１の底部
にもどる。The developer 9 not used for this development returns from between the lower sealing material 26 and the developer carrier 2 to the bottom of the hopper 4, that is, the bottom of the developing member storage section 21, by the rotation of the developer carrier 2.
前記ロアシール材２６は３０〜２００μｍのプラスチッ
クシートで構成され、現像剤担持体２に対して図示のよ
うにプラスチックシート自体の弾性で押しつげられてい
ると共に、ロアシール材２６の前方にはロアバッフル２
７が設はうして現像剤９がホッパー４からこぼれ落ちな
いようにしである。The lower sealing material 26 is made of a plastic sheet with a thickness of 30 to 200 μm, and is pressed against the developer carrier 2 by the elasticity of the plastic sheet itself as shown in the figure.
7 is provided to prevent the developer 9 from spilling out of the hopper 4.
また、現像剤９が隙間Ｓ１を通過する際に壁面４′と摺
擦して摩擦帯電されるが、その壁面４′の構成材は現像
剤の帯電極性と同一極性を有する材料、つまり前述の現
像剤の摩擦帯電極性がゼロ又は靜１潜像の帯電極性と逆
の極性となる材料としであるので、現像剤９が壁面４′
に静電吸着することがなく、現像剤９を現像剤担持体２
に十分なる量だけ確実に送ることができる。In addition, when the developer 9 passes through the gap S1, it rubs against the wall surface 4' and is charged by friction, but the constituent material of the wall surface 4' is a material having the same charging polarity as the developer, that is, the above-mentioned material. Since the developer is made of a material whose frictional charge polarity is zero or opposite to the charge polarity of the latent image, the developer 9 is applied to the wall surface 4'.
The developer 9 is not electrostatically attracted to the developer carrier 2.
It is possible to reliably send only enough quantity.
具体例として、壁面４′の構成材を負極性のテフロン材
とし、使用する現像剤９を含金属染料を含有した負極性
の現像剤としたところ、広面績ベタ黒の均一なコピー画
像が得られた。As a specific example, when the wall surface 4' is made of a Teflon material with negative polarity and the developer 9 used is a negative polarity developer containing a metal-containing dye, a wide-area solid black uniform copy image is obtained. It was done.
また、テフロン材に変えてＡＢＳ樹脂、Ａｓ樹脂、塩化
ビニール樹脂、ポリオレフィン樹脂、ポリエステル樹脂
等の負極性の材料を用いても前述と同様に均一な広面積
の□ペタ黒コピー画像が得られた。Furthermore, even if a negative polarity material such as ABS resin, As resin, vinyl chloride resin, polyolefin resin, or polyester resin was used instead of Teflon material, a uniform wide-area □ peta black copy image could be obtained in the same manner as described above. .
比較例として、正極性のポリアミド樹脂をテフロン材に
変えてテストしたところ、不均一なベタ黒コピー画質し
か得られなかった。As a comparative example, when a test was conducted in which the positive polarity polyamide resin was replaced with a Teflon material, only uneven solid black copy image quality was obtained.
他の具体例として、壁面４′の構成材を正極性のポリイ
ミド材とし、使用する現像剤９を第４級アンモニウム塩
を含有した正極性の現像剤としたところ、広面積ペタ黒
の均一なコピー画像が得られた。As another specific example, when the constituent material of the wall surface 4' is made of a positive polarity polyimide material and the developer 9 used is a positive polarity developer containing a quaternary ammonium salt, a wide-area peta black uniform A copy image was obtained.
また、ポリイミド材に変えてポリアミド樹脂、ポリウレ
タン樹脂、メラミン樹脂、ボリクレア樹脂等の正極性の
成形材で壁面４′を構成しても、前述と同様に均一な広
面積ベタ黒のコピー画像が得られた。Furthermore, even if the wall surface 4' is made of a positive polarity molding material such as polyamide resin, polyurethane resin, melamine resin, or Voricrea resin instead of polyimide material, a uniform wide-area solid black copy image can be obtained as described above. It was done.
比較？ｌｊとして、負極性のテフロン材を壁面４′の構
成材として用いて前述と同様なテストをしたところ不均
一なベタ黒のコピー画質しか得られなかった。Comparison? When a test similar to that described above was carried out using a negative polarity Teflon material as the material for forming the wall surface 4' as lj, only a non-uniform, solid black copy image quality was obtained.
なお、以上の実格例によればホッパー４を現像剤収納部
２０と現像部材収納部２］とを水平方向に連続して有す
る形状としたから、全高比を低くできる。In addition, according to the above practical example, since the hopper 4 has a shape in which the developer storage section 20 and the developing member storage section 2 are continuous in the horizontal direction, the overall height ratio can be reduced.
発明の効果
ホッパー４と現像剤供給部材３の隙間Ｓ１を現像剤９が
通過する際て摩擦帯電して壁面４′に静電吸着すること
が防止されて隙間Ｓ１に現像剤９が堆積することがなく
、常に十分なる量の現像剤を送ることができるので、広
面積均一なベタ黒のコピー画像が得られる。Effects of the Invention When the developer 9 passes through the gap S1 between the hopper 4 and the developer supply member 3, it is prevented from being frictionally charged and electrostatically attracted to the wall surface 4', and the developer 9 is deposited in the gap S1. Since there is no problem and a sufficient amount of developer can always be sent, a uniform, solid black copy image can be obtained over a wide area.
第１図は本発明の実施例を示す断面図、第２図は従来例
の断面図である。
２は現像剤担持体、３は現像剤供給部材、４はホッパー
、４′は壁面、５は規制部材、６は静電潜像、９は現像
剤、Ｓｌは隙間。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. 2 is a developer carrying member, 3 is a developer supplying member, 4 is a hopper, 4' is a wall surface, 5 is a regulating member, 6 is an electrostatic latent image, 9 is a developer, and Sl is a gap.
Claims (1)
設して、ホッパー４内の現像剤９をホッパー４の底部と
現像剤供給部材３との隙間Ｓ＿１を通して現像剤担持体
２に送ると共に、規制部材５によつて所定の厚さで電荷
を有する現像剤層１３を現像剤担持体２上に形成し、現
像剤担持体２を回転して現像剤層１３を静電潜像６に搬
送する現像装置において、前記ホッパー４の底部におけ
る隙間Ｓ＿１を構成する壁面４′を現像剤の帯電極性と
同一極性を有する材料としたことを特徴とする現像装置
。A developer carrier 2 and a developer supply member 3 are arranged in the hopper 4, and the developer 9 in the hopper 4 is passed through the gap S_1 between the bottom of the hopper 4 and the developer supply member 3 to the developer carrier 2. At the same time, a charged developer layer 13 having a predetermined thickness is formed on the developer carrier 2 by the regulating member 5, and the developer carrier 2 is rotated to form the developer layer 13 into an electrostatic latent image. 6, wherein the wall surface 4' forming the gap S_1 at the bottom of the hopper 4 is made of a material having the same polarity as the charge polarity of the developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18197686A JPS6338970A (en) | 1986-08-04 | 1986-08-04 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18197686A JPS6338970A (en) | 1986-08-04 | 1986-08-04 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6338970A true JPS6338970A (en) | 1988-02-19 |
| JPH0478993B2 JPH0478993B2 (en) | 1992-12-14 |
Family
ID=16110155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18197686A Granted JPS6338970A (en) | 1986-08-04 | 1986-08-04 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6338970A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5003917A (en) * | 1988-08-12 | 1991-04-02 | Minolta Camera Kabushiki Kaisha | Developing apparatus with image quality control |
| JP2008229764A (en) * | 2007-03-19 | 2008-10-02 | Fukuoka Institute Of Technology | Rotary tool and machining method |
| JP2011064860A (en) * | 2009-09-16 | 2011-03-31 | Kyocera Mita Corp | Developing device and image forming apparatus provided with same |
-
1986
- 1986-08-04 JP JP18197686A patent/JPS6338970A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5003917A (en) * | 1988-08-12 | 1991-04-02 | Minolta Camera Kabushiki Kaisha | Developing apparatus with image quality control |
| JP2008229764A (en) * | 2007-03-19 | 2008-10-02 | Fukuoka Institute Of Technology | Rotary tool and machining method |
| JP2011064860A (en) * | 2009-09-16 | 2011-03-31 | Kyocera Mita Corp | Developing device and image forming apparatus provided with same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0478993B2 (en) | 1992-12-14 |
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