JPH0630906B2 - Electrostatic recording method - Google Patents
Electrostatic recording methodInfo
- Publication number
- JPH0630906B2 JPH0630906B2 JP21230786A JP21230786A JPH0630906B2 JP H0630906 B2 JPH0630906 B2 JP H0630906B2 JP 21230786 A JP21230786 A JP 21230786A JP 21230786 A JP21230786 A JP 21230786A JP H0630906 B2 JPH0630906 B2 JP H0630906B2
- Authority
- JP
- Japan
- Prior art keywords
- recording paper
- electrostatic recording
- spacer
- electrostatic
- recording
- 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 title claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 28
- 230000002159 abnormal effect Effects 0.000 description 28
- 238000005259 measurement Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 229910001369 Brass Inorganic materials 0.000 description 5
- 239000010951 brass Substances 0.000 description 5
- 229910000906 Bronze Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
- B41J2/39—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material using multi-stylus heads
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ファクシミリ装置やプロッタ等に用いられて
いる静電記録方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic recording method used in facsimile machines, plotters and the like.
従来の技術 一般に、静電記録装置は第５図に示すように、ロール状
２から供給される静電記録紙１と、多数の針電極３及び
補助電極４が静電記録紙１の幅方向（主走査方向）に配
置されて静電記録紙１に静電潜像を形成する記録ヘッド
５と、スポンジ等の硬度が非常に小さい材料で形成され
て静電記録ヘッド５に静電記録紙１を接触させるパット
ローラ６と、静電記録紙１の背面を接地するアース電極
７と、静電記録紙１に形成された潜像を可視像化する現
像器８と、静電記録紙１を搬送する搬送ローラ９より概
略構成され、静電記録ヘッド５の針電極３や補助電極４
は、黄銅等の銅系の材料で形成されている。2. Description of the Related Art Generally, in an electrostatic recording apparatus, as shown in FIG. 5, an electrostatic recording paper 1 supplied from a roll 2, a large number of needle electrodes 3 and auxiliary electrodes 4 are arranged in the width direction of the electrostatic recording paper 1. The recording head 5 arranged in the (main scanning direction) to form an electrostatic latent image on the electrostatic recording paper 1, and the electrostatic recording head 5 formed of a material having a very small hardness such as sponge. 1, a pad roller 6 for contacting the electrostatic recording paper 1, a ground electrode 7 for grounding the back surface of the electrostatic recording paper 1, a developing device 8 for visualizing the latent image formed on the electrostatic recording paper 1, and an electrostatic recording paper. 1. The needle electrode 3 and the auxiliary electrode 4 of the electrostatic recording head 5 are roughly configured by a conveyance roller 9 that conveys 1
Is made of a copper-based material such as brass.
他方、静電記録紙１は、導電性の基紙全体に低抵抗物質
を含浸させてこの基紙上に記録層となる誘電層を形成し
た２層形のものや、基紙と記録層の間に低抵抗層を形成
した３層形のものが知られている。記録層は、潜像電荷
を保持するために高い体積抵抗率を有するシリコン樹脂
などが用いられ、また記録層内には、静電記録紙１がパ
ットローラ６により静電記録ヘッド５に押圧されること
に対し、静電記録紙１に放電に必要なエアギャップを形
成するために通常CaCO3のスペーサが混入されている。On the other hand, the electrostatic recording paper 1 is of a two-layer type in which a conductive base paper is impregnated with a low resistance substance to form a dielectric layer as a recording layer on the base paper, or between the base paper and the recording layer. A three-layer type in which a low resistance layer is formed is known. The recording layer is made of silicon resin or the like having a high volume resistivity to retain latent image charges, and the electrostatic recording paper 1 is pressed by the pad roller 6 against the electrostatic recording head 5 in the recording layer. On the other hand, a spacer of CaCO 3 is usually mixed in the electrostatic recording paper 1 in order to form an air gap necessary for discharging.
発明が解決しようとする問題点 しかしながら、かかる構成にあっては、第６図に示すよ
うに異常ドット10又は異常放電と呼ばれる記録が発生
し、画質を低下させるという問題点がある。Problems to be Solved by the Invention However, in such a configuration, there is a problem in that recording called abnormal dots 10 or abnormal discharge occurs as shown in FIG. 6 and the image quality is degraded.
かかる問題点は、異常ドットの発生メカニズムは未だ明
確ではないが、種々の実験から硬いスペーサ（CaCO3は
モース硬度５）が静電記録ヘッド５の補助電極４を削
り、削られた金属粉が針電極３上に搬送されて異常ドッ
ト10を発生し、また同様にスペーサが針電極３を削り、
針電極３のバリ等が異常ドット10を発生することが判明
した。The problem is that the generation mechanism of abnormal dots is still unclear, but from various experiments, a hard spacer (CaCO 3 has a Mohs hardness of 5) scrapes the auxiliary electrode 4 of the electrostatic recording head 5 and scraped metal powder is generated. An abnormal dot 10 is generated by being conveyed onto the needle electrode 3, and similarly, the spacer scrapes the needle electrode 3,
It was found that burrs and the like of the needle electrode 3 generated the abnormal dot 10.
本発明は上記問題点に鑑みて為されたもので、静電記録
装置を変更することなく、異常ドットの発生を軽減する
ことができる静電記録方法を提供することを目的とす
る。The present invention has been made in view of the above problems, and an object thereof is to provide an electrostatic recording method capable of reducing the occurrence of abnormal dots without changing the electrostatic recording device.
問題点を解決するための手段 本発明は上記問題点を解決するために、モース硬度３以
下のスペーサを静電記録紙の誘電層に混入し、この静電
記録紙で記録を行うことを特徴とする。Means for Solving the Problems In order to solve the above problems, the present invention is characterized in that a spacer having a Mohs hardness of 3 or less is mixed in a dielectric layer of an electrostatic recording paper and recording is performed with the electrostatic recording paper. And
作用 本発明は上記構成により、記録ヘッドの電極が静電記録
紙のスペーサにより削られることを防止することがで
き、したがって静電記録紙に記録される異常ドットを軽
減することが可能となる。Effect With the above-described configuration, the present invention can prevent the electrodes of the recording head from being scraped by the spacers of the electrostatic recording paper, and thus can reduce the abnormal dots recorded on the electrostatic recording paper.
実施例 以下、図面を参照して本発明の実施例を説明する。Embodiments Embodiments of the present invention will be described below with reference to the drawings.
第１図(イ)は、本発明の一実施例に係る静電記録紙Ａに
記録された異常ドットの発生個数の測定結果を示すグラ
フ、第１図(ロ)は、従来例の静電記録紙Ｂに記録された
異常ドットの発生個数の測定結果を示すグラフであり、
それぞれ50ｍ走行して16ｋdotを印字した場合を示す。FIG. 1 (a) is a graph showing the measurement result of the number of abnormal dots recorded on the electrostatic recording paper A according to one embodiment of the present invention, and FIG. 7 is a graph showing the measurement result of the number of abnormal dots recorded on the recording paper B,
The figure shows the case of printing 50 km each and printing 16 kdots.
記録紙Ａの誘電層には第１図(イ)下段に示すように、モ
ース硬度３の無機顔料をスペーサとして混入し、記録紙
Ｂの誘電層には第１図(ロ)下段に示すようにモース硬度
５のCaCO3をスペーサとして混入し、また両者のスペー
サによる平均突起高さ（記録紙Ａは7.3μ、記録紙Ｂは
7.7μ）及び単位面積当たりの突起個数（記録紙Ａは約1
100個／mm2、記録紙Ｂは約1080個／mm2）を略同一にし
て測定した。尚、静電記録ヘッドは16dot／mm、針電極
は燐青銅線、補助電極は黄銅のものを使用した。As shown in the lower part of FIG. 1 (a), an inorganic pigment having a Mohs hardness of 3 is mixed as a spacer in the dielectric layer of the recording paper A, and as shown in the lower part of FIG. 1 (b) in the dielectric layer of the recording paper B. CaCO 3 with a Mohs hardness of 5 is mixed as a spacer, and the average protrusion height by both spacers (recording paper A is 7.3 μ, recording paper B is
7.7μ) and the number of protrusions per unit area (recording paper A is about 1
100 / mm 2, the recording paper B was measured to about 1080 / mm 2) to substantially the same. The electrostatic recording head was 16 dots / mm, the needle electrode was phosphor bronze wire, and the auxiliary electrode was brass.
この図から明らかなように、モース硬度３のスペーサを
用いた記録紙Ａは、モース硬度５のスペーサを用いた記
録紙Ｂに比較して異常ドット発生個数が激減しており、
したがってスペーサとして硬度の小さい材料を選択する
と、異常ドットの発生を軽減することができる。As is clear from this figure, the recording paper A using the spacer having the Mohs hardness of 3 has a significantly reduced number of abnormal dots, as compared with the recording paper B using the spacer having the Mohs hardness of 5,
Therefore, if a material having low hardness is selected as the spacer, the occurrence of abnormal dots can be reduced.
第２図は、従来例のようにモース硬度５のスペーサを用
い、単位面積当たりの突起個数及び突起高さは前記記録
紙Ａ、Ｂと異なる記録紙Ｃに、針電極が燐青銅線であっ
て補助電極が黄銅（ビッカース硬度190）の静電記録ヘ
ッドと、針電極が同様に燐青銅線であって補助電極がス
テンレス（ビッカース硬度370）の静電記録ヘッド（両
ヘッド共８dot／mm）によりそれぞれ500ｍ走行して発生
した異常ドット数を測定したグラフを示す。In FIG. 2, a spacer having a Mohs hardness of 5 is used as in the conventional example, the number of protrusions per unit area and the protrusion height are different from those of the recording papers A and B, and the needle electrode is a phosphor bronze wire. Electrostatic recording head with brass (Vickers hardness of 190) as auxiliary electrode and phosphor bronze wire with needle electrode of stainless steel (Vickers hardness of 370) as auxiliary electrode (both heads 8dot / mm) 2 shows a graph in which the number of abnormal dots generated by running 500 m each was measured.
この図から明らかなように、ステンレスの補助電極を用
いた静電記録ヘッドの異常ドット発生個数は、黄銅の補
助電極を用いた静電記録ヘッドと比較して約１／２であ
った。ステンレスは黄銅より約２倍の硬度を有すること
から、硬さが異常ドット発生個数に大きく影響すること
が判る。したがって、静電記録ヘッドの材料を硬くして
も異常ドットを減少することができる。As is clear from this figure, the number of abnormal dots generated in the electrostatic recording head using the stainless auxiliary electrode was about 1/2 of that in the electrostatic recording head using the brass auxiliary electrode. Since stainless steel has hardness about twice that of brass, it can be seen that hardness greatly affects the number of abnormal dots. Therefore, the abnormal dots can be reduced even if the material of the electrostatic recording head is hardened.
第３図(イ)、(ロ)、(ハ)は、モース硬度３のスペーサを用
いて平均突起高さを略同一にし（それぞれ6.6μ、6.1
μ、6.8μ）、それぞれ異なるスペーサ混入量で単位面
積当たりの突起個数が異なるように形成した記録紙Ｄ
（突起個数約1300電／mm2）記録紙Ｅ（同500個／mm2）
及び記録紙Ｆ（同320個／mm2）を50ｍ走行して発生した
異常ドット数を測定したグラフを示す。3 (a), (b), and (c) use spacers with a Mohs hardness of 3 to make the average protrusion heights approximately the same (6.6 μ and 6.1, respectively).
μ, 6.8 μ), and recording paper D formed so that the number of protrusions per unit area is different due to different spacer mixing amounts.
(Approximately 1300 projections / mm 2 ) Recording paper E (500 projections / mm 2 )
And, the graph which measured the number of abnormal dots which a recording paper F (the same 320 pieces / mm 2 ) run for 50 m is shown.
第３図の上段及び下段に示すように、スペーサの混入量
すなわち単位面積当たりの突起個数は、異常ドットの発
生個数よりも記録濃度やドット形状に影響を与えること
が判り、第３図(ハ)の下段に示すように、突起個数が少
なくなるとドット形状は悪くなる。この理由は、突起個
数が少なくなると記録紙とヘッドとの間ののエアギャッ
プがヘッド全体に渡って均一でなくなり、放電がヘッド
全体に渡って均一でなくなってドット形状が乱れるもの
と考えられる。As shown in the upper and lower rows of FIG. 3, it was found that the amount of spacers mixed, that is, the number of protrusions per unit area, affects the recording density and dot shape more than the number of abnormal dots generated. ) As shown in the lower stage, the dot shape becomes worse as the number of protrusions decreases. It is considered that the reason is that when the number of protrusions is reduced, the air gap between the recording paper and the head is not uniform over the entire head, and the discharge is not uniform over the entire head and the dot shape is disturbed.
他方、第３図(イ)の中段に示すように、単位面積当たり
の突起個数が多くなると記録濃度が低下する傾向とな
る。この理由は第３図(イ)の下段に示すように、突起の
部分は充分な放電が得られず、記録紙Ｄにはトナーが充
分付着しなかったものと考えられるる。On the other hand, as shown in the middle part of FIG. 3A, the recording density tends to decrease as the number of protrusions per unit area increases. This is presumably because, as shown in the lower part of FIG. 3 (a), sufficient electric discharge was not obtained at the protrusions, and the toner did not adhere sufficiently to the recording paper D.
以上の測定結果から、記録紙上の単位面積当たりのスペ
ーサの突起個数が400〜500個／mm2以上の場合に、ドッ
ト形状が明確な画像が得られ、また1000個／mm2程度以
下の場合に充分な記録濃度が得られる。尚、第３図(イ)
の下段に示すような記録濃度であっても実用上は問題が
ない。From the above measurement results, when the number of spacer protrusions per unit area on the recording paper is 400 to 500 / mm 2 or more, a clear dot shape image is obtained, and when it is about 1000 / mm 2 or less A sufficient recording density can be obtained. Incidentally, FIG. 3 (a)
Even if the recording density is as shown in the lower part, there is no problem in practical use.
第４図(イ)、(ロ)、(ハ)は、単位面積当たりののスペーサ
の突起個数を略同一にし（それぞれ約600個／mm2、500
個／mm2、450個／mm2）、エアギャップすなわちスペー
サの突起高さが異なるように形成した記録紙Ｇ（平均突
起高さ9.3μ）、記録紙Ｅ（同6.1μ）及び記録紙Ｈ（同
2.3μ）を50ｍ走行して発生した異常ドット数を測定し
たグラフを示す。4 (a), (b), and (c) show that the number of spacer protrusions per unit area is approximately the same (approximately 600 / mm 2 , 500, respectively).
Pcs / mm 2 , 450 pcs / mm 2 ), recording paper G (average projection height 9.3μ), recording paper E (same as 6.1μ) and recording paper H formed with different air gaps, that is, spacer heights. (same
Fig. 3 shows a graph in which the number of abnormal dots generated after traveling for 2.3 m) for 50 m is measured.
スペーサの突起高さが低い場合には第４図(ハ)の上段に
示すように、初期の異常ドットの発生個数が非常に多く
なり、また第４図(ハ)の下段に示すようにドット形状が
不明確になる。したがって好ましいドット形状を得るた
め及び異常ドットの発生個数を少なくするためには、一
般に言われているようにスペーサの突起高さが４〜５μ
程度になるように形成することが望ましい。When the protrusion height of the spacer is low, the number of abnormal dots generated in the initial stage is very large as shown in the upper part of FIG. 4 (c), and the number of dots is increased as shown in the lower part of FIG. 4 (c). The shape becomes unclear. Therefore, in order to obtain a preferable dot shape and reduce the number of abnormal dots generated, it is generally said that the protrusion height of the spacer is 4 to 5 μm.
It is desirable to form it to a certain extent.
以上説明した測定結果から、静電記録装置を変更するこ
となく記録紙上の異常ドットの発生個数を減少するため
には、記録紙の記録層に混入するスペーサの硬度を低く
する必要があり、またスペーサの単位面積当たりの突起
個数を400個／mm2以上にして突起高さを４μ以上にする
ことが望ましい。但し、上記突起個数と突起高さは、ド
ット形状や記録濃度に影響するために上記の値に限定さ
れるものではない。From the measurement results described above, in order to reduce the number of abnormal dots generated on the recording paper without changing the electrostatic recording device, it is necessary to reduce the hardness of the spacer mixed in the recording layer of the recording paper. It is desirable that the number of protrusions per unit area of the spacer is 400 / mm 2 or more and the protrusion height is 4 μm or more. However, the number of protrusions and the height of the protrusions are not limited to the above values because they influence the dot shape and the recording density.
前記実施例では、記録紙Ａに混入するスペーサとしてモ
ース硬度３の無機顔料を用いたが、本発明はこの材料に
限定されるものではなく、高抵抗プラスティック等の他
のモース硬度３以下の材料を選択することができる。Although an inorganic pigment having a Mohs hardness of 3 is used as the spacer mixed in the recording paper A in the above-described embodiment, the present invention is not limited to this material, and other materials having a Mohs hardness of 3 or less such as high resistance plastic. Can be selected.
発明の効果 以上説明したように本発明は、モース硬度３以下のスペ
ーサを静電記録紙の誘電層に混入し、この静電記録紙で
記録を行うようにしたので、記録ヘッドの電極が静電記
録紙のスペーサにより削られることを防止することがで
き、したがって静電記録紙に記録される異常ドットを軽
減することが可能となる。EFFECTS OF THE INVENTION As described above, according to the present invention, a spacer having a Mohs hardness of 3 or less is mixed in the dielectric layer of electrostatic recording paper to perform recording with this electrostatic recording paper, so that the electrodes of the recording head are static. It is possible to prevent the electrophotographic recording paper from being scraped by the spacers, and therefore it is possible to reduce abnormal dots recorded on the electrostatic recording paper.
第１図 は、本発明の一実施例に係る静電記録紙に記録
された異常ドットの発生個数の測定結果および従来例の
静電記録紙に記録された異常ドットの発生個数の測定結
果を示す図 、第２図は、異なる硬度の記録ヘッドで
記録された異常ドットの発生個数の測定結果を示すグラ
フ、第３図 はそれぞれ、単位面積当たりのス
ペーサの突起個数が異なる記録紙に記録された異常ドッ
トの発生個数の測定結果を示す図 、第４図
はそれぞれ、スペーサの突起高さが異なる記録紙に記
録された異常ドットの発生個数の測定結果を示す図
、第５図は、静電記録装置の概略構成図、第６図は、
記録紙に記録された異常ドットの説明図である。FIG. 1 shows a measurement result of the number of abnormal dots recorded on an electrostatic recording paper according to an embodiment of the present invention and a measurement result of the number of abnormal dots recorded on a conventional electrostatic recording paper. Fig. 2 and Fig. 2 are graphs showing the measurement results of the number of abnormal dots recorded by recording heads of different hardness, and Fig. 3 is recorded on recording paper with different numbers of spacer protrusions per unit area. Fig. 4, Fig. 4 showing the measurement results of the number of abnormal dots generated
Figure shows the measurement results of the number of abnormal dots recorded on recording paper with different spacer heights.
, FIG. 5 is a schematic configuration diagram of the electrostatic recording device, and FIG. 6 is
FIG. 9 is an explanatory diagram of abnormal dots recorded on a recording sheet.
Claims (1)
下のスペーサを混入し、前記静電記録紙に静電潜像を形
成することを特徴とする静電記録方法。1. An electrostatic recording method characterized in that a spacer having a Mohs hardness of 3 or less is previously mixed in a recording layer of the electrostatic recording paper to form an electrostatic latent image on the electrostatic recording paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21230786A JPH0630906B2 (en) | 1986-09-09 | 1986-09-09 | Electrostatic recording method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21230786A JPH0630906B2 (en) | 1986-09-09 | 1986-09-09 | Electrostatic recording method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6367159A JPS6367159A (en) | 1988-03-25 |
| JPH0630906B2 true JPH0630906B2 (en) | 1994-04-27 |
Family
ID=16620395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21230786A Expired - Lifetime JPH0630906B2 (en) | 1986-09-09 | 1986-09-09 | Electrostatic recording method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0630906B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63276053A (en) * | 1987-05-08 | 1988-11-14 | Oji Paper Co Ltd | Electrostatic recording body |
-
1986
- 1986-09-09 JP JP21230786A patent/JPH0630906B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6367159A (en) | 1988-03-25 |
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