JPH0210419B2 - - Google Patents
Info
- Publication number
- JPH0210419B2 JPH0210419B2 JP58201047A JP20104783A JPH0210419B2 JP H0210419 B2 JPH0210419 B2 JP H0210419B2 JP 58201047 A JP58201047 A JP 58201047A JP 20104783 A JP20104783 A JP 20104783A JP H0210419 B2 JPH0210419 B2 JP H0210419B2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- magnetic
- carrier
- charge
- weight
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 239000003086 colorant Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- 229910010272 inorganic material Inorganic materials 0.000 claims description 5
- 239000011147 inorganic material Substances 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 1
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
- Developing Agents For Electrophotography (AREA)
Description
【発明の詳細な説明】
〔産上の利用分野〕
本発明は、電子写真装置などの画像形成装置に
おいて静電潜像を粉体トナーのみからなる一成分
現像剤によつて可視像化する非磁性一成分現像方
法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a method for visualizing an electrostatic latent image in an image forming device such as an electrophotographic device using a one-component developer consisting only of powder toner. This invention relates to a non-magnetic one-component developing method.
〔従来の技術〕
従来、現像剤を担持する担持体に現像剤を供給
し、規制部材により、上記担持体上に現像剤の薄
層を形成すると共に電荷を与え、該現像剤を静電
潜像を保持する保持体に転送し、該静電潜像上に
現像剤を付着させて現像を行なう非磁性一成分現
像方法として、特開昭47―13088号や特開昭54―
111358号等に開示されているような種々の方法が
開発されている。[Prior Art] Conventionally, a developer is supplied to a carrier carrying the developer, and a regulating member forms a thin layer of developer on the carrier and applies an electric charge to the developer, causing the developer to become electrostatically latent. As a non-magnetic one-component developing method in which the image is transferred to a holder that holds the image and a developer is attached to the electrostatic latent image for development, Japanese Patent Application Laid-open Nos. 13088-1988 and 1973-
Various methods have been developed, such as those disclosed in No. 111358 and others.
これらの方法に用いられる現像剤としては、ス
チレン樹脂やアクリル樹脂のような熱可塑性樹脂
中に、着色剤としてカーボンのような顔料や荷電
制御剤として含金属アゾ染料等を含有せしめて、
粉砕、分級により約10μ程度の大きさにしたもの
が一般的なものであつた。特に、特開昭54―
111358号に開示されている方法にあつては、現像
剤に電荷を与える手段として規制部材に電圧を印
加し、担持体との間の電界により現像剤に電荷を
注入せしめるものであるが、従来の現像剤を用い
ているため、容易に帯電することかできなかつ
た。すなわち、現像剤に必要な電荷を与えるため
に、規制部材に高い電圧を印加することが必要で
あるが、担持体と規制部材との間で放電が起り、
現像剤の荷電が不充分であつた。このため、コピ
ー画像はカブリが発生したり、現像不足になつた
りして、鮮明な画像が得られないという問題があ
つた。
The developer used in these methods is a thermoplastic resin such as styrene resin or acrylic resin containing a pigment such as carbon as a coloring agent and a metal-containing azo dye as a charge control agent.
Generally, the particles were crushed and classified to a size of about 10 μm. In particular, JP-A-1987-
In the method disclosed in No. 111358, a voltage is applied to the regulating member as a means of imparting charge to the developer, and the charge is injected into the developer by the electric field between it and the carrier. Because a developer of 100% was used, it was not possible to easily charge the battery. That is, in order to give the developer the necessary charge, it is necessary to apply a high voltage to the regulating member, but discharge occurs between the carrier and the regulating member.
The developer was insufficiently charged. For this reason, there have been problems in that the copied image may be foggy or underdeveloped, making it impossible to obtain a clear image.
従つて、本発明の目的は、前記した従来技術の
欠点に鑑み、現像剤への電荷注入を容易にし、カ
ブリや現像不足のない鮮明な画像が得られる非磁
性一成分現像方法を提供することにある。 Therefore, an object of the present invention is to provide a non-magnetic one-component developing method that facilitates charge injection into the developer and provides clear images without fogging or insufficient development, in view of the drawbacks of the prior art described above. It is in.
本発明に係る非磁性一成分現像方法は、前記目
的を達成するため、現像剤を担持する担持体に現
像剤を供給し、規制部材により上記担持体上に現
像剤の薄層を形成すると共に電荷を与え、該現像
剤を静電潜像を保持する保持体に転送し、該静電
潜像上に現像剤を付着させて現像し、ついで用紙
に転写を行なう非磁性一成分現像方法において、
上記非磁性一成分現像剤として、結着剤樹脂及び
着色剤を主体とした現像剤に無機材料からなる強
誘電体を現像剤に対し0.1〜2.0重量％の割合で現
像剤の表面に添加せしめた現像剤を用いることを
特徴としている。
In order to achieve the above object, the non-magnetic one-component developing method according to the present invention supplies a developer to a carrier carrying the developer, forms a thin layer of developer on the carrier by a regulating member, and In a non-magnetic one-component development method in which an electric charge is applied, the developer is transferred to a holder holding an electrostatic latent image, the developer is deposited on the electrostatic latent image for development, and then transferred to paper. ,
As the non-magnetic one-component developer, a ferroelectric material made of an inorganic material is added to the surface of the developer at a ratio of 0.1 to 2.0% by weight based on the developer, which is mainly composed of a binder resin and a colorant. It is characterized in that it uses a developer that is
以下、本発明の態様について詳細に説明する。
まず、本発明の現像剤に用いられる結着剤樹脂と
しては、種々の熱可塑性樹脂がある。例えば、各
種スチレン樹脂、各種アクリル樹脂、各種エポキ
シ樹脂、各種ポリエステル樹脂、フエノール樹
脂、マレイン酸樹脂、クマロン樹脂、ポリビニル
ブチラール等あるいはこれらの共重合体等が挙げ
られる。
Hereinafter, aspects of the present invention will be explained in detail.
First, there are various thermoplastic resins as the binder resin used in the developer of the present invention. Examples include various styrene resins, various acrylic resins, various epoxy resins, various polyester resins, phenolic resins, maleic acid resins, coumaron resins, polyvinyl butyral, and copolymers thereof.
また、着色剤としては、カーボンブラツク等の
顔料や各種染料が用いられる。 Further, as the coloring agent, pigments such as carbon black and various dyes are used.
本発明に係る現像剤では、これら一般的に用い
られる材料に加えて無機材料からなる強誘電体を
添加する。用いられる強誘電体としては、
BaTiO3，NaNO3，LiTaO3，LiNbO3，
KNbO3，KHPO4，PbH3PO4，WO3，PbTiO3，
TiO2等が挙げられる。 In the developer according to the present invention, in addition to these commonly used materials, a ferroelectric material made of an inorganic material is added. The ferroelectric material used is
BaTiO 3 , NaNO 3 , LiTaO 3 , LiNbO 3 ,
KNbO 3 , KHPO 4 , PbH 3 PO 4 , WO 3 , PbTiO 3 ,
Examples include TiO2 .
強誘電体を添加する方法としては、一般に、着
色剤と同様に混練機で結着剤中に分散せしめる場
合と、混練、粉砕、分級によつて得られた結着
剤、着色剤を主体とする現像剤粒子に混合機を使
用して表面に添加する場合の２つの手段が採用可
能であるが、上記添加方法のうちの後者、すなわ
ち現像剤の表面に添加する場合には、強誘電体の
添加量を少なくすることができるので特に有利で
ある。このため、本発明ではこの方法が好適に採
用される。 In general, ferroelectric materials are added by dispersing them in a binder using a kneader in the same way as colorants, or by using binders and colorants obtained through kneading, pulverization, and classification. There are two methods that can be used: adding the ferroelectric material to the surface of the developer particles using a mixer. This is particularly advantageous because the amount of addition can be reduced. Therefore, this method is preferably employed in the present invention.
添加量は0.1重量％から2.0重量％の範囲が好ま
しい。その理由は、0.1重量％未満では強誘電体
を添加した効果がなく、一方、2.0重量％を超え
ると現像剤の比抵抗が低くなり、転写不良を起こ
すためである。 The amount added is preferably in the range of 0.1% by weight to 2.0% by weight. The reason for this is that if the amount is less than 0.1% by weight, the addition of the ferroelectric material will have no effect, while if it exceeds 2.0% by weight, the specific resistance of the developer will become low, resulting in poor transfer.
以下、実施例を示して本発明を具体的に説明す
る。
Hereinafter, the present invention will be specifically explained with reference to Examples.
比較現像剤の調製：
ポリスチレン（Ｄ―150、エツソ石油化学社製）
60重量部、スチレン―ブタジエン共重合体（ニポ
ール2007J、日本ゼオン社製）30重量部、及びカ
ーボンブラツク（MA―100、三菱化成社製）10
重量部を混練、粉砕、分級して約10μの比較現像
剤を作成した。Preparation of comparative developer: Polystyrene (D-150, manufactured by Etsuso Petrochemical Co., Ltd.)
60 parts by weight, 30 parts by weight of styrene-butadiene copolymer (Nipole 2007J, manufactured by Nippon Zeon Co., Ltd.), and 10 parts by weight of carbon black (MA-100, manufactured by Mitsubishi Kasei Corporation)
Parts by weight were kneaded, pulverized, and classified to prepare a comparative developer of approximately 10 μm.
実施例 １
上記比較現像剤に対し1.0重量％の割合でTiO2
（P25，日本アエロジル社製）を添加して本発明
の現像剤を得た。添加処理はヘンシエル型の混合
機を用いて行なつた。Example 1 TiO 2 was added at a ratio of 1.0% by weight to the above comparative developer.
(P25, manufactured by Nippon Aerosil Co., Ltd.) was added to obtain the developer of the present invention. The addition process was carried out using a Henschel type mixer.
上記２つの現像剤を、それぞれ、第１図に示し
た非磁性一成分現像装置に入れてテストした。 The above two developers were put into a non-magnetic one-component developing device shown in FIG. 1 and tested.
第１図において、ホツパー２に貯蔵された現像
剤１は、規制部材４により担持体３上に薄層に層
形成されると共に、電荷注入電源５により荷電さ
れ、保持体６上の静電潜像に付着し現像が行なわ
れる。この時、残留電荷によるカブリを除くた
め、担持体３にバイアス電位をバイアス電源７に
より印加する。 In FIG. 1, the developer 1 stored in the hopper 2 is formed into a thin layer on the carrier 3 by the regulating member 4, and is charged by the charge injection power source 5, and the electrostatic potential on the carrier 6 is It adheres to the image and is developed. At this time, a bias potential is applied to the carrier 3 by the bias power supply 7 in order to eliminate fog due to residual charges.
上記テストの結果、本発明の現像剤を用いた場
合には、電荷注入電源５により充分な電荷が得ら
れ、カブリのない鮮明な画像が得られた。これに
対し、比較現像剤を用いた場合には、充分な電荷
が得られず、カブリ及び現像不良を生じた。 As a result of the above test, when the developer of the present invention was used, sufficient charge was obtained by the charge injection power source 5, and a clear image without fogging was obtained. On the other hand, when the comparative developer was used, sufficient charge could not be obtained, resulting in fogging and poor development.
TiO2の添加量を変えて試験したところ、0.1重
量％以下では効果が殆んどなくなり、また2.0重
量％以上では現像剤の比抵抗が下がり、転写不良
を起こした。 When the amount of TiO 2 added was varied and tested, if it was less than 0.1% by weight, there was almost no effect, and if it was more than 2.0% by weight, the resistivity of the developer decreased and poor transfer occurred.
また、強誘電体としてBaTiO3，LiTaO3等を
用いても同様な結果が得られた。 Similar results were also obtained using BaTiO 3 , LiTaO 3 , etc. as the ferroelectric material.
参考例
前比較現像剤と同じ組成の混合物にさらに
BaTiO30.5重量部を混練し、粉砕、分級して約
10μの現像剤を得た。Reference example Addition of a mixture of the same composition as the previous comparative developer
Knead 0.5 parts by weight of BaTiO 3 , crush and classify to approx.
A 10μ developer was obtained.
これを実施例１で用いたのと同様の非磁性一成
分現像装置（第１図参照）に入れてテストしとこ
ろ、鮮明でカブリの全くない画像が得られた。 When this was tested by putting it into a non-magnetic one-component developing device similar to that used in Example 1 (see FIG. 1), clear images with no fog were obtained.
以上のテストにおいて、担持体３と規制部材４
との間の電界と現像剤１の荷電状態を調べた結果
を第２図に示す。荷電状態としては、ブローオフ
法によつて得た帯電量を示す。第２図から明らか
なように、本発明の現像剤は、比較現像剤に比べ
て極めて容易に荷電されることが解る。 In the above test, the carrier 3 and the regulating member 4
FIG. 2 shows the results of examining the electric field between and the charging state of the developer 1. The charge state is the amount of charge obtained by the blow-off method. As is clear from FIG. 2, the developer of the present invention is much more easily charged than the comparative developer.
本発明の非磁性一成分現像方法によれば、以下
のような効果が得られる。
According to the non-magnetic one-component developing method of the present invention, the following effects can be obtained.
(A) 現像剤への電荷注入性がよくなる。(A) Improves charge injection into the developer.
すなわち、本発明によれば、前記したよう
に、結着剤樹脂及び着色剤を主体とした現像剤
に無機材料からなる強誘電体を0.1〜2.0重量％
の割合で現像剤の表面に添加せしめた現像剤を
用いるため、現像剤は効率の良い電荷の注入を
受けることができ、従つてカブリや現像不良を
生ぜずに鮮明な画像が得られる。 That is, according to the present invention, as described above, 0.1 to 2.0% by weight of a ferroelectric material made of an inorganic material is added to a developer mainly consisting of a binder resin and a colorant.
Since the developer is added to the surface of the developer at a ratio of , the developer can receive efficient charge injection, and therefore clear images can be obtained without causing fog or development defects.
(B) 本発明の現像剤によれば、その抵抗値は適正
な範囲に設定されるので、例えば磁性一成分現
像剤のように抵抗値が低いためにそのままでは
用紙への転写が困難であると言つた問題もな
く、良好な転写が得られる。(B) According to the developer of the present invention, its resistance value is set within an appropriate range, so it is difficult to transfer onto paper as it is due to its low resistance value, such as a magnetic one-component developer. Good transfer can be obtained without such problems.
(C) 現像剤に添加する強誘電体は無機材料から選
択されたものであるため、熱及び化学的安定性
が高く、長期に亘つてその特性を一定に維持す
ることができる。(C) Since the ferroelectric substance added to the developer is selected from inorganic materials, it has high thermal and chemical stability and can maintain its properties constant over a long period of time.
第１図は本発明の非磁性一成分現像方法の現像
装置の概略図、第２図は担持体―規制部材間の電
界と現像剤の帯電量の関係を示すグラフである。
１……現像剤、３……担持体、４……規制部
材、６……保持体。
FIG. 1 is a schematic diagram of a developing device of the non-magnetic one-component developing method of the present invention, and FIG. 2 is a graph showing the relationship between the electric field between the carrier and the regulating member and the amount of charge of the developer. 1...Developer, 3...Carrier, 4...Regulation member, 6...Holder.
Claims (1)
規制部材により上記担持体上に現像剤の薄層を形
成すると共に電荷を与え、該現像剤を静電潜像を
保持する保持体に転送し、該静電潜像上に現像剤
を付着させて現像し、ついで用紙に転写を行なう
非磁性一成分現像方法において、上記非磁性一成
分現像剤として、結着剤樹脂及び着色剤を主体と
した現像剤に無機材料からなる強誘電体を現像剤
に対し0.1〜2.0重量％の割合で現像剤の表面に添
加せしめた現像剤を用いることを特徴とする非磁
性一成分現像方法。1 Supplying the developer to a carrier that supports the developer,
A thin layer of developer is formed on the carrier by a regulating member and a charge is applied thereto, the developer is transferred to a holder that holds the electrostatic latent image, and the developer is deposited on the electrostatic latent image. In a non-magnetic one-component developing method in which the non-magnetic one-component developer is developed and then transferred to paper, a ferroelectric material made of an inorganic material is developed in a developer mainly consisting of a binder resin and a colorant. A non-magnetic one-component developing method characterized by using a developer added to the surface of the developer in an amount of 0.1 to 2.0% by weight based on the developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201047A JPS6093454A (en) | 1983-10-28 | 1983-10-28 | Developer used for non-magnetic one-component developing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201047A JPS6093454A (en) | 1983-10-28 | 1983-10-28 | Developer used for non-magnetic one-component developing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6093454A JPS6093454A (en) | 1985-05-25 |
| JPH0210419B2 true JPH0210419B2 (en) | 1990-03-08 |
Family
ID=16434520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58201047A Granted JPS6093454A (en) | 1983-10-28 | 1983-10-28 | Developer used for non-magnetic one-component developing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093454A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03174003A (en) * | 1989-11-30 | 1991-07-29 | Yamashiyou:Kk | Suspender |
| JPH0522514U (en) * | 1991-07-24 | 1993-03-23 | 日本自動車整備商工組合連合会 | Salopette and pants |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317460A (en) * | 1986-07-09 | 1988-01-25 | Kao Corp | Toner for developing electrostatic charge image |
| JPH0711726Y2 (en) * | 1989-09-07 | 1995-03-22 | 三洋電機株式会社 | Rechargeable portable cleaner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4847345A (en) * | 1971-10-12 | 1973-07-05 | ||
| JPS51101535A (en) * | 1975-03-04 | 1976-09-08 | Toyo Ink Mfg Co | |
| JPS5394933A (en) * | 1977-01-31 | 1978-08-19 | Hitachi Metals Ltd | Magnetic toner |
| JPS5779954A (en) * | 1980-11-06 | 1982-05-19 | Canon Inc | Developing powder |
| JPS5879253A (en) * | 1981-11-05 | 1983-05-13 | Ricoh Co Ltd | Developing powder |
-
1983
- 1983-10-28 JP JP58201047A patent/JPS6093454A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4847345A (en) * | 1971-10-12 | 1973-07-05 | ||
| JPS51101535A (en) * | 1975-03-04 | 1976-09-08 | Toyo Ink Mfg Co | |
| JPS5394933A (en) * | 1977-01-31 | 1978-08-19 | Hitachi Metals Ltd | Magnetic toner |
| JPS5779954A (en) * | 1980-11-06 | 1982-05-19 | Canon Inc | Developing powder |
| JPS5879253A (en) * | 1981-11-05 | 1983-05-13 | Ricoh Co Ltd | Developing powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03174003A (en) * | 1989-11-30 | 1991-07-29 | Yamashiyou:Kk | Suspender |
| JPH0522514U (en) * | 1991-07-24 | 1993-03-23 | 日本自動車整備商工組合連合会 | Salopette and pants |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6093454A (en) | 1985-05-25 |
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