JPS6245986B2 - - Google Patents
Info
- Publication number
- JPS6245986B2 JPS6245986B2 JP53146998A JP14699878A JPS6245986B2 JP S6245986 B2 JPS6245986 B2 JP S6245986B2 JP 53146998 A JP53146998 A JP 53146998A JP 14699878 A JP14699878 A JP 14699878A JP S6245986 B2 JPS6245986 B2 JP S6245986B2
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- light
- color
- image
- photoconductive layer
- 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.)
- Expired
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 13
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 229910052711 selenium Inorganic materials 0.000 description 5
- 239000011669 selenium Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229910001215 Te alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- FKNIDKXOANSRCS-UHFFFAOYSA-N 2,3,4-trinitrofluoren-1-one Chemical compound C1=CC=C2C3=C([N+](=O)[O-])C([N+]([O-])=O)=C([N+]([O-])=O)C(=O)C3=CC2=C1 FKNIDKXOANSRCS-UHFFFAOYSA-N 0.000 description 1
- IICCLYANAQEHCI-UHFFFAOYSA-N 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound O1C(=O)C(C(=C(Cl)C(Cl)=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 IICCLYANAQEHCI-UHFFFAOYSA-N 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 229930187593 rose bengal Natural products 0.000 description 1
- 229940081623 rose bengal Drugs 0.000 description 1
- STRXNPAVPKGJQR-UHFFFAOYSA-N rose bengal A Natural products O1C(=O)C(C(=CC=C2Cl)Cl)=C2C21C1=CC(I)=C(O)C(I)=C1OC1=C(I)C(O)=C(I)C=C21 STRXNPAVPKGJQR-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Description
【発明の詳細な説明】 この発明は、２色電子写真複写方法に関する。[Detailed description of the invention] The present invention relates to a two-color electrophotographic copying method.
２色電子写真複写方法は、電子写真プロセスを
利用して、白地に黒色画像および有彩のＡ色画像
を有する原稿を複写し、複写上で上記各色画像を
互いに異なる色で再現する方法であるが、近時そ
の実用化が意図され、それとともに種々のプロセ
スが提案されている。 The two-color electrophotographic copying method is a method of copying a document having a black image and a chromatic A-color image on a white background using an electrophotographic process, and reproducing each of the above-mentioned color images in different colors on the copy. However, in recent years, attempts have been made to put it into practical use, and various processes have been proposed.
本発明の目的とするところもまた、新規な２色
電子写真方法を提供することである。 It is also an object of the present invention to provide a new two-color electrophotographic method.
以下、図面を参照しながら、本発明を説明す
る。 The present invention will be described below with reference to the drawings.
第１図において、符号１は、本発明の実施に使
用する感光体の１例を示している。感光体１は、
導電性基体１０上に、Ａ色光に対し感度をもたな
い光導電層１１と、Ａ色光に対し感度を有する光
導電層１２とを積層し、この光導電層１２の上に
さらに、透明絶縁層１３を積層した４層構造とな
つている。 In FIG. 1, reference numeral 1 indicates one example of a photoreceptor used in carrying out the present invention. The photoreceptor 1 is
A photoconductive layer 11 that is not sensitive to A color light and a photoconductive layer 12 that is sensitive to A color light are laminated on a conductive substrate 10, and a transparent insulating layer is further layered on this photoconductive layer 12. It has a four-layer structure in which layers 13 are laminated.
本発明による２色電子写真複写方法を、この感
光体１を用いて実施するには、次のようにする。 The two-color electrophotographic copying method according to the present invention is carried out using this photoreceptor 1 as follows.
すなわち、先ず第１に、感光体１の表面を、チ
ヤージヤー２により所定の極性、例えば正極性に
１次帯電する。この１次帯電は、感光体１におけ
る光導電層１１，１２ともに導電化しうるような
光で均一に感光体表面側を照射しながら行なう。
上記光として、具体的には白色光を用いれば良
い。すると、この露光の効果により、光導電層１
１，１２はともに導電体と化するから、透明絶縁
層１３の裏面には、同絶縁層１３の表面に付与さ
れる正電荷に対応する負電荷が均一に誘起分布す
る。この負電荷は、後に形成される静電潜像の、
黒色画像に対応する静電潜像部分の形成に用いら
れるものであるから、このような用途に用いうる
程度の量の負電荷が、誘導されるように、１次帯
電を行なわねばならない。 That is, first, the surface of the photoreceptor 1 is primarily charged to a predetermined polarity, for example, positive polarity, by the charger 2. This primary charging is performed while uniformly irradiating the surface of the photoreceptor 1 with light that can make both the photoconductive layers 11 and 12 of the photoreceptor 1 conductive.
Specifically, white light may be used as the light. Then, due to the effect of this exposure, the photoconductive layer 1
Since both 1 and 12 become conductors, negative charges corresponding to the positive charges imparted to the surface of the transparent insulating layer 13 are uniformly induced and distributed on the back surface of the transparent insulating layer 13. This negative charge is responsible for the electrostatic latent image that is formed later.
Since it is used to form an electrostatic latent image portion corresponding to a black image, primary charging must be performed so that an amount of negative charge that can be used for such purposes is induced.
次に、今度はチヤージヤー３により、１次帯電
と逆極性すなわち該説明例では負極性の２次帯電
を行なう。この２次帯電は、１次帯電による正電
荷が完全に相殺され、感光体表面が完全に負極性
に帯電するように行なう。また、２次帯電を行な
う間、導電性基体１０側の光導電層すなわち光導
電層１１のみを導電体化する光により感光体１を
照射する。このようなことが可能であるために
は、光導電層１２は、光導電層１１の分光感度の
有感領域に不感領域をもたねばならない。上記２
次帯電の際に感光体１の照射に用いられる光と
は、上記不感領域に波長を有する光である。 Next, the charger 3 performs secondary charging of the opposite polarity to the primary charging, that is, negative polarity in this example. This secondary charging is performed so that the positive charge caused by the primary charging is completely canceled out and the surface of the photoreceptor is completely negatively charged. Further, during secondary charging, the photoreceptor 1 is irradiated with light that turns only the photoconductive layer on the side of the conductive substrate 10, that is, the photoconductive layer 11, into a conductor. In order for this to be possible, the photoconductive layer 12 must have an insensitive area in the spectral sensitivity sensitive area of the photoconductive layer 11. Above 2
The light used to irradiate the photoreceptor 1 during the next charging is light having a wavelength in the above-mentioned insensitive region.
このように、感光体１の光導電層１２が光照射
する光に感度を有さぬから、光導電層１２は絶縁
体としてふるまい、透明絶縁層裏面の負電荷は同
位置に安定に保持される。一方、光導電層１１は
上記光照射により導電体と化しているから、透明
絶縁層裏面の負電荷、およびチヤージヤー３によ
る２次帯電により透明絶縁層表面に付与される負
電荷の形成する電界の作用により、導電性基体１
０から正電荷が流入し、この正電荷は、光導電層
１１の、光導電層１２との境界近傍に均一に分布
し、２次帯電が終了し、光導電層１１を導電体化
する光照射がやんで、同層が絶縁体に返ると、上
記境界近傍に安定に保持される。この正電荷は、
静電潜像の形成にあつては、Ａ色画像に対応する
静電潜像部分の形成に用いられるのであり、従つ
て、２次帯電は、この目的にそつて行なわれねば
ならない。 In this way, since the photoconductive layer 12 of the photoreceptor 1 has no sensitivity to the irradiated light, the photoconductive layer 12 behaves as an insulator, and the negative charges on the back surface of the transparent insulating layer are stably held at the same position. Ru. On the other hand, since the photoconductive layer 11 has been turned into a conductor by the light irradiation, the electric field formed by the negative charges on the back surface of the transparent insulating layer and the negative charges imparted to the surface of the transparent insulating layer by secondary charging by the charger 3. Due to the action, the conductive substrate 1
A positive charge flows in from 0, and this positive charge is uniformly distributed near the boundary between the photoconductive layer 11 and the photoconductive layer 12, and the secondary charging is completed, and the light that turns the photoconductive layer 11 into a conductor is generated. When the irradiation stops and the layer turns back into an insulator, it is stably held near the boundary. This positive charge is
In forming an electrostatic latent image, it is used to form an electrostatic latent image portion corresponding to the A color image, and therefore, secondary charging must be performed for this purpose.
２次帯電は、光導電層１１の材料を適切に選択
すれば、これを暗中で行つても良い。 The secondary charging may be performed in the dark if the material of the photoconductive layer 11 is appropriately selected.
２次帯電を暗中で行なう場合には、光導電層１
１に対して、次の如き物性が要求される。すなわ
ち、該説明例に即していえば、この物性とは、暗
中においても、電界の作用のもとに正電荷として
の正孔が、導電性基体１０から光導電層１１に注
入され、注入された正孔が、光導電層１１の、光
導電層１２との境界部に安定にトラツプされるこ
とである。このような物性を示す光導電材料とし
ては、セレンをあげることができる。このような
物性を有する光導電層を用いれば、２次帯電を暗
中で行なつても、上記説明におけると同様の結果
を得ることができる。この場合には、感光体１を
構成するさい、光導電層１１，１２として、互い
に分光感度の有感領域が分離しているものを組合
せる必要はかならずしもない。 When performing secondary charging in the dark, the photoconductive layer 1
1, the following physical properties are required. In other words, in accordance with the explanation example, this physical property means that holes as positive charges are injected from the conductive substrate 10 into the photoconductive layer 11 under the action of an electric field even in the dark. This means that the holes are stably trapped at the boundary between the photoconductive layer 11 and the photoconductive layer 12. An example of a photoconductive material exhibiting such physical properties is selenium. If a photoconductive layer having such physical properties is used, the same results as in the above description can be obtained even if secondary charging is performed in the dark. In this case, when constructing the photoreceptor 1, it is not necessarily necessary to combine photoconductive layers 11 and 12 whose spectral sensitive regions are separated from each other.
さて、２次帯電がおわつたら、今度はチヤージ
ヤー４を用いて、感光体表面の負電荷を暗中で除
電する。この除電には正極性のコロナ放電か、交
流コロナ放電を利用する。この除電により感光体
表面の負電荷がが除去されると、光導電層１１の
正電荷は光導電層１２の負電荷に対し過剰とな
り、過剰正電荷に対応する負電荷が、導電性基体
１０の、光導電層１１との境界部に誘起分布す
る。 Now, after the secondary charging has finished, the charger 4 is used to eliminate the negative charges on the surface of the photoreceptor in the dark. For this static elimination, positive polarity corona discharge or alternating current corona discharge is used. When the negative charges on the surface of the photoreceptor are removed by this static elimination, the positive charges on the photoconductive layer 11 become excessive with respect to the negative charges on the photoconductive layer 12, and the negative charges corresponding to the excess positive charges are transferred to the conductive substrate 10. is induced and distributed at the boundary with the photoconductive layer 11.
この状態において、感光体表面電位が、なおか
つ負極性の十分な電位値を有するように、上記１
次および２次帯電がなされなければならない。 In this state, the above-mentioned method is applied so that the photoreceptor surface potential has a sufficient potential value of negative polarity.
Secondary and secondary charging must occur.
次いで、除電後の感光体１に、原稿Ｏの光像を
照射して露光を行なう。原稿Ｏには、白地部OW
に、黒色画像OBおよびＡ色画像OAが記載されて
いるが、上記光像により露光されると、白地部
OWに対応する部位においては、感光体１は白色
光で照射され、この部位では光導電層１１，１２
ともに導電体となるから、各光導電層中の電荷は
消失し、この部位において感光体表面電位は０と
なる。Ａ色画像OAに対応する部位においては、
感光体１はＡ色光により照射され、光導電層１２
のみが導電体となり、同層中の負電荷は、光導電
層１１中の正電荷の一部と相殺しあう。これによ
り、この部位においては、感光体表面電位に最も
寄与する電荷が、光導電層１１に残留する正電荷
となり、上記表面電位は、負極性から正極性へと
反転する。一方、黒色画像OBに対応する部位に
おいては、感光体１は未露光のままにとどまるか
ら、この部位においては、感光体表面電位は負極
性のまゝにとどまる。 Next, a light image of the original O is irradiated onto the photoreceptor 1 after static electricity removal to perform exposure. For manuscript O, white area OW
, black image OB and A color image OA are described, but when exposed with the above light image, the white background part
In the region corresponding to the OW, the photoreceptor 1 is irradiated with white light, and in this region the photoconductive layers 11, 12
Since both become conductors, the charge in each photoconductive layer disappears, and the surface potential of the photoreceptor becomes 0 at this location. In the part corresponding to the A color image OA,
The photoreceptor 1 is irradiated with A color light and the photoconductive layer 12
The photoconductive layer 11 becomes a conductor, and the negative charges in the same layer cancel out some of the positive charges in the photoconductive layer 11. As a result, in this portion, the charge that contributes most to the photoreceptor surface potential becomes a positive charge remaining in the photoconductive layer 11, and the surface potential is reversed from negative polarity to positive polarity. On the other hand, since the photoreceptor 1 remains unexposed in the portion corresponding to the black image OB, the photoreceptor surface potential remains negative in this portion.
かくして、負極性の感光体表面電位分布により
黒色画像に対応する静電潜像部分が形成され、正
極性の感光体表面電位分布により、Ａ色画像に対
応する静電潜像部分が形成される。 In this way, an electrostatic latent image portion corresponding to a black image is formed by the negative polarity photoreceptor surface potential distribution, and an electrostatic latent image portion corresponding to the A color image is formed by the positive polarity photoreceptor surface potential distribution. .
ここまでのプロセスにおける感光体表面電位の
変遷を第２図に模型的に示す。第２図に示す表面
電位遷移は、感光体１を用いる場合の本発明の実
体を示すものである。換言すれば、上記プロセス
における１次帯電、２次帯電は、上記プロセスに
より感光体表面電位が第２図に示すように変遷す
るようになさえねばならないのである。 FIG. 2 schematically shows the changes in the photoreceptor surface potential in the process up to this point. The surface potential transition shown in FIG. 2 shows the substance of the present invention when the photoreceptor 1 is used. In other words, the primary charging and secondary charging in the above process must be such that the surface potential of the photoreceptor changes as shown in FIG. 2.
このようにして感光体１に形成された静電潜像
のうち、正極性の静電潜像部分を、負極性に帯電
させたＡ色トナーＴAで可視化し、負極性の静電
潜像部分を、正極性に帯電させた黒色トナーＴB
で可視化すれば、感光体１上に、原稿Ｏに対応す
る２色可視像が得られる。現像方式は、任意のも
のを用いて良い。この２色可視像は、感光体１が
シート状であれば、そのまま感光体上に提着して
複写に供すれば良いし、そうでない場合には、適
当な記録シート上へ転写し、定着して複写に供す
れば良い。 Among the electrostatic latent images formed on the photoconductor 1 in this way, the positive electrostatic latent image portion is visualized with the negatively charged A color toner T A , and the negative electrostatic latent image is Black toner T B whose portion is positively charged
When visualized, a two-color visible image corresponding to the original O is obtained on the photoreceptor 1. Any developing method may be used. If the photoreceptor 1 is in the form of a sheet, this two-color visible image can be directly deposited on the photoreceptor and used for copying, or if it is not, it can be transferred onto an appropriate recording sheet. All you have to do is fix it and use it for copying.
上記の説明例においては、感光体１の構成にあ
つて、Ａ色光に感度をもたない光導電層１１の上
に、Ａ色光に感度をもつ光導電層１２を設けた
が、この光導電層の積層順序は、これを逆にして
も良い。 In the above example of explanation, in the structure of the photoreceptor 1, the photoconductive layer 12 sensitive to color A light was provided on the photoconductive layer 11 not sensitive to color A light. The stacking order of the layers may be reversed.
第３図には、Ａ色光に感度をもつ光導電層１２
を導電性基体側に配した感光体１Ａを用いる場合
の本発明のプロセスを略示する。なお繁雑をさけ
るため、混同の恐れのないものについては、第１
図におけると同一の符号を用いた。 FIG. 3 shows a photoconductive layer 12 sensitive to A color light.
The process of the present invention in the case of using a photoreceptor 1A in which a conductive substrate is disposed on the conductive substrate side is schematically illustrated. To avoid confusion, please refer to the first page for items that are unlikely to cause confusion.
The same symbols as in the figure are used.
感光体１Ａを用いても、２色電子写真複写プロ
セス自体は、上述の例と全く同じであり、プロセ
スは、１次帯電、２次帯電、除電、光像照射によ
る露光、現像の順序で行なわれる。 Even if the photoreceptor 1A is used, the two-color electrophotographic copying process itself is exactly the same as the above example, and the process is performed in the order of primary charging, secondary charging, neutralization, exposure by light image irradiation, and development. It can be done.
１次帯電の際に光導電層１１，１２ともに導電
体化する光により感光体を均一照射する点も、２
次帯電を暗中、もしくは導電性基体側の光導電層
のみを導電体化する光による露光下で行なう点も
変わりない。ただ、上記例と異なるのは、１次帯
電と２次帯電における帯電量に関する条件のみで
ある。これは、簡単にいえば、１次帯電から感光
体露光にいたるプロセスに従つて、感光体表面電
位が第４図に示すように変化するように、１次帯
電およそ２次帯電を行なうということに他ならな
い。その結果、感光体１Ａにおける静電潜像の出
来かたは、感光体１における静電潜像のでき方と
異なつたものとなり、黒色画像に対応する静電潜
像部分の極性が正極性、Ａ色画像に対応する静電
潜像部分の極性が負極性となる。 Another point is that the photoreceptor is uniformly irradiated with light that turns both the photoconductive layers 11 and 12 into conductors during primary charging.
There is no difference in the fact that the subsequent charging is carried out in the dark or under exposure to light that turns only the photoconductive layer on the conductive substrate side into a conductor. However, the only difference from the above example is the conditions regarding the amount of charge in primary charging and secondary charging. Simply put, this means that as the process from primary charging to exposure of the photoreceptor occurs, the surface potential of the photoreceptor changes as shown in Figure 4, so that primary charging and approximately secondary charging are performed. Nothing but. As a result, the formation of an electrostatic latent image on the photoconductor 1A is different from the formation of an electrostatic latent image on the photoconductor 1, with the polarity of the electrostatic latent image portion corresponding to the black image being positive, and the polarity of the electrostatic latent image corresponding to the black image being positive, The polarity of the electrostatic latent image portion corresponding to the image becomes negative.
したがつて、黒色画像に対応する静電潜像を可
視化する黒色トナーＴB1はこれを負帯電させねば
ならず、Ａ色画像に対応する静電潜像部分を可視
化するＡ色トナーＴA1は、これを正帯電させねば
ならない。 Therefore, the black toner T B1 that visualizes the electrostatic latent image corresponding to the black image must be negatively charged, and the A color toner T A1 that visualizes the electrostatic latent image portion corresponding to the A color image must be negatively charged. , which must be positively charged.
以下に、発明者が行なつた具体的な実験例を記
する。 Below, specific experimental examples conducted by the inventor will be described.
（実験例 １）
アルミニウム板を導電性基体とし、その上に、
純度99.99％のセレンを下地温度50℃、真空度５
×10-5torrで厚さ10μに蒸着した。これを１週間
暗所に放置したのち、セレン層上にポリビニルカ
ルバゾールトリニトロフルオレノン（以下PVK
―TNFと略す。）の層を厚さ20μにコーテイング
した。さらにその上にポリエステル樹脂、旭化成
社製Ｕ―ポリマー（商品名）を厚さ５μにコーテ
イングして、感光体を構成した。この感光体は、
Ａ色を赤色とした場合の感光体１に相当する。光
導電層１１としてのセレン層が赤色光に対して感
度をもたないからである。(Experimental example 1) An aluminum plate is used as a conductive substrate, and on top of it,
99.99% pure selenium at base temperature 50℃, vacuum degree 5
It was deposited to a thickness of 10μ at ×10 -5 torr. After leaving this in a dark place for a week, polyvinylcarbazole trinitrofluorenone (hereinafter referred to as PVK) was placed on the selenium layer.
-Abbreviated as TNF. ) was coated to a thickness of 20μ. Furthermore, a polyester resin, U-polymer (trade name) manufactured by Asahi Kasei Co., Ltd., was coated thereon to a thickness of 5 μm to form a photoreceptor. This photoreceptor is
This corresponds to the photoconductor 1 when the color A is red. This is because the selenium layer as the photoconductive layer 11 has no sensitivity to red light.
光導電層１２としてのPVK―TNF層はパンク
ロマチツクな分光感度を有するが、光導電層１１
としてのセレン層には前述の物性があるから、２
次帯電は、これを暗中で行なうことができる。ま
た、透明絶縁層としてのＵ―ポリマーは、電気抵
抗が体積固有抵抗で1016Ωcmと極めて高く、機械
的強度もすぐれている。 The PVK-TNF layer as the photoconductive layer 12 has panchromatic spectral sensitivity, but the photoconductive layer 11
Since the selenium layer has the above-mentioned physical properties, 2
The next charging can be performed in the dark. Furthermore, the U-polymer used as the transparent insulating layer has an extremely high electrical resistance of 10 16 Ωcm in terms of volume resistivity, and excellent mechanical strength.
まず、この感光体を白色光により照射しつつ、
＋5.5KVのコロナ放電で＋900Vに１次帯電し、
次いで暗中で−6.0KVのコロナ放電で２次帯電を
行ない、さらに＋4.5KVのコロナ放電で感光体表
面の除電を行つたところ感光体表面電位は、２次
帯電後の−600Vから−400Vへ変化した。 First, while irradiating this photoreceptor with white light,
It is primarily charged to +900V by +5.5KV corona discharge,
Next, secondary charging was performed in the dark with a corona discharge of -6.0 KV, and the charge on the surface of the photoreceptor was removed with a corona discharge of +4.5 KV, and the surface potential of the photoreceptor changed from -600V after the secondary charging to -400V. changed.
次に、白地に、赤黒２色で画像を記載した原稿
の光像で露光を行つたところ、感光体表面電位
は、白地部対応部位で−20V、黒色画像対応部位
で−380V、赤色画像対応部位で＋220Vとなつ
た。なお、この露光工程における、感光体照射光
量は白地部対応部位で10μＪ／cm2であつた。 Next, when exposure was performed with a light image of a document with an image written in red and black on a white background, the photoreceptor surface potential was -20V at the area corresponding to the white background, -380V at the area corresponding to the black image, and -380V at the area corresponding to the red image. +220V at the part. In this exposure step, the amount of light irradiated on the photoreceptor was 10 μJ/cm 2 at a portion corresponding to the white background.
かくして感光体に形成された静電潜像を、正帯
電黒色トナーおよび負帯電赤色トナーを用い、磁
気ブラシ現像方式で順次現像したところ鮮明な赤
黒２色可視像が得られた。 The electrostatic latent image thus formed on the photoreceptor was sequentially developed by a magnetic brush development method using a positively charged black toner and a negatively charged red toner, and a clear red and black two-color visible image was obtained.
上記感光体をドラム状に形成し、可視像転写方
式の試作実験機に組込んで耐久性テストを行なつ
た。現像は磁気ブラシ方式、クリーニングはブレ
ード方式（ゴムブレード使用）である。その結果
複写枚数にして５万枚以上の耐久性を上記感光体
が有することが確認された。またドラム状感光体
作製のコストは、アルミニウムドラムの製造コス
トを別にして、月産1000本程度の場合、1.3〜1.6
万円と試算された。 The photoreceptor was formed into a drum shape, and was incorporated into a prototype experimental machine using a visible image transfer method to conduct a durability test. Development is done using a magnetic brush, and cleaning is done using a blade method (using a rubber blade). As a result, it was confirmed that the photoreceptor had a durability of 50,000 copies or more. In addition, the cost of producing a drum-shaped photoreceptor is 1.3 to 1.6 yen for a monthly production of about 1000 drums, excluding the production cost of aluminum drums.
It was estimated to be 10,000 yen.
（実験例 ２）
アルミニウム板を導電性基体とし、この上に、
下地温度74℃で、厚さ50μのセレン―テルル合金
層（テルル混入量5W％）を蒸着形成した。この
うえに、ローズベンガルのみで増感した酸化亜鉛
樹脂（酸化亜鉛対樹脂は重量比で３対１）を厚さ
15μにコーテイングした。その上に、厚さ５μ
に、ポリエステル樹脂（前出）をコーテイングし
た。このようにして形成された感光体は、Ａ色を
赤色とした場合の、前述の感光体１Ａに対応す
る。光導電層１１としての酸化亜鉛樹脂層が赤色
光に対し、光感度をもたないからである。光導電
層１２としてのセレン―テルル合金層はパンクロ
マチツクな分光感度をもつている。(Experimental example 2) An aluminum plate is used as a conductive substrate, and on this,
A 50μ thick selenium-tellurium alloy layer (tellurium content: 5W%) was deposited at a substrate temperature of 74℃. In addition, a zinc oxide resin sensitized only with rose bengal (3:1 weight ratio of zinc oxide to resin) is added to the thickness.
Coated to 15μ. On top of that, a thickness of 5μ
was coated with polyester resin (described above). The photoreceptor formed in this manner corresponds to the above-described photoreceptor 1A in which the color A is red. This is because the zinc oxide resin layer as the photoconductive layer 11 has no photosensitivity to red light. The selenium-tellurium alloy layer as the photoconductive layer 12 has panchromatic spectral sensitivity.
第４図に示すような表面電位変化を実現するよ
うに、本発明のプロセスを行なつて、良好な２色
複写が得られた。 Good two-color copies were obtained by carrying out the process of the present invention to achieve the surface potential changes shown in FIG.
第１図ないし第４図は、本発明を説明するため
の図である。
１，１Ａ……感光体、１０……導電性基体、１
１，１２……光導電層、１３……透明絶縁層、
２，３，４……チヤージヤー。
1 to 4 are diagrams for explaining the present invention. 1,1A...photoreceptor, 10...conductive substrate, 1
1, 12... photoconductive layer, 13... transparent insulating layer,
2, 3, 4...Charger.
Claims (1)
る原稿を複写し、複写上で上記各色画像を互いに
異なる色で再現する方法であつて、 導電性基体上に、Ａ色光に対し光感度をもたな
い光導電層と、Ａ色光に対し光感度をもつ他の光
導電層とを任意の順位に積層し、さらに、これら
２層の光導電層上に透明絶縁層を設けてなる感光
体を、 上記両光導電層をともに導電体化しうる光で均
一に照射しつつ、感光体表面を所定の極性に１次
帯電し、 次いで暗中もしくは上記導電性基体側の光導電
層のみを導電化しうる光で感光体を均一照射しつ
つ、１次帯電とは逆極性の２次帯電を行つて、感
光体表面を、１次帯電の極性と逆極性に帯電せし
め、 さらに、暗中にて、感光体表面の電荷を除電し
たのち、原稿光像による感光体露光を行なつて、
原稿の白地部に対応する部位における感光体表面
電位を略Ｏとし、黒色画像に対応する静電潜像部
分と、Ａ色画像に対応する静電潜像部分とを、相
互に逆極性の感光体表面電位分布により形成し、 これらの静電潜像部分を、互いに逆極性に帯電
され、相互に異なる色に着色された２種のトナー
により可視化することを特徴とする、２色電子写
真複写方法。[Claims] 1. A method for copying a document having a black image and a chromatic A-color image on a white background, and reproducing each of the above-mentioned color images in different colors on the copy, comprising the steps of: A photoconductive layer that is not sensitive to colored light and another photoconductive layer that is sensitive to A color light are laminated in any order, and a transparent insulating layer is further formed on these two photoconductive layers. The surface of the photoreceptor is primarily charged to a predetermined polarity while uniformly irradiating the photoreceptor with light that can make both of the photoconductive layers conductive, and then the photoreceptor is charged in the dark or with light on the side of the conductive substrate. While uniformly irradiating the photoreceptor with light that can make only the conductive layer conductive, secondary charging with a polarity opposite to the primary charging is performed to charge the surface of the photoreceptor with a polarity opposite to that of the primary charging, and further After removing the charge on the surface of the photoreceptor in the dark, the photoreceptor is exposed to the light image of the original.
The surface potential of the photoreceptor in the area corresponding to the white background of the document is approximately O, and the electrostatic latent image area corresponding to the black image and the electrostatic latent image area corresponding to the A color image are exposed to light with opposite polarity. Two-color electrophotographic copying, which is formed by body surface potential distribution and is characterized in that these electrostatic latent image parts are visualized using two types of toners that are charged with opposite polarities and colored in mutually different colors. Method.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14699878A JPS5573062A (en) | 1978-11-28 | 1978-11-28 | Two color electrophotographic copying method |
| US06/012,571 US4335194A (en) | 1978-02-20 | 1979-02-15 | Two color electrophotographic process and material |
| DE2906500A DE2906500C3 (en) | 1978-02-20 | 1979-02-20 | Electrophotographic process for making two-color records |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14699878A JPS5573062A (en) | 1978-11-28 | 1978-11-28 | Two color electrophotographic copying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5573062A JPS5573062A (en) | 1980-06-02 |
| JPS6245986B2 true JPS6245986B2 (en) | 1987-09-30 |
Family
ID=15420272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14699878A Granted JPS5573062A (en) | 1978-02-20 | 1978-11-28 | Two color electrophotographic copying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5573062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619480U (en) * | 1992-08-24 | 1994-03-15 | アース製薬株式会社 | Heating evaporator |
| JPH0838015A (en) * | 1994-07-29 | 1996-02-13 | Toshio Shimamura | Fumigator for chemical |
-
1978
- 1978-11-28 JP JP14699878A patent/JPS5573062A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619480U (en) * | 1992-08-24 | 1994-03-15 | アース製薬株式会社 | Heating evaporator |
| JPH0838015A (en) * | 1994-07-29 | 1996-02-13 | Toshio Shimamura | Fumigator for chemical |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5573062A (en) | 1980-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4071361A (en) | Electrophotographic process and apparatus | |
| JPS6032192B2 (en) | 3-color electrophotographic copying method | |
| JPS6245986B2 (en) | ||
| EP0130787A2 (en) | An electrophotographic method for the formation of two-colored images | |
| US3666365A (en) | Electrophotographic process and apparatus involving persistent internal polarization | |
| JPS5919335B2 (en) | electrophotography | |
| JPS6245987B2 (en) | ||
| JP2825809B2 (en) | Color electrophotographic method and apparatus | |
| JPS5922223B2 (en) | Two-color image formation method | |
| JPH01126661A (en) | Image forming method | |
| JPS58102249A (en) | Two-color electrophotographic method | |
| JPS5922224B2 (en) | Two-color image formation method | |
| JPS6330625B2 (en) | ||
| JPS6029945B2 (en) | Method for manufacturing photoconductor element | |
| JPS6023348B2 (en) | Two-color electrophotographic copying method | |
| JPS6262350B2 (en) | ||
| JPS6262349B2 (en) | ||
| JPS6261954B2 (en) | ||
| JPS6216422B2 (en) | ||
| JPS6246861B2 (en) | ||
| JPS5831369A (en) | Method for destaticizing photoreceptor in two-color electrophotographic process | |
| JPS6028352B2 (en) | Two-color electrophotography method | |
| JPS58102250A (en) | Two color electrophotographic method | |
| JPS6341872A (en) | Image forming device | |
| JPS6248228B2 (en) |