JPH0261519A - Magnetic recording medium for magnetic encoder - Google Patents
Magnetic recording medium for magnetic encoderInfo
- Publication number
- JPH0261519A JPH0261519A JP63211795A JP21179588A JPH0261519A JP H0261519 A JPH0261519 A JP H0261519A JP 63211795 A JP63211795 A JP 63211795A JP 21179588 A JP21179588 A JP 21179588A JP H0261519 A JPH0261519 A JP H0261519A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording medium
- magnetic recording
- encoder
- 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.)
- Granted
Links
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000011651 chromium Substances 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010955 niobium Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910017110 Fe—Cr—Co Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は磁気式エンコーダ用磁気記録媒体に関し、特
に、一定の割合よりも小さい結晶粒径のＦ ［！−Ｃｒ
−Ｃｏ合金を用いろことにより、均一な磁力線を得るこ
とができろものに関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a magnetic recording medium for a magnetic encoder, and in particular, the present invention relates to a magnetic recording medium for a magnetic encoder, and in particular, F [! -Cr
- By using a Co alloy, uniform lines of magnetic force can be obtained.
「従来の技術」
従来から、浸秀な磁石特性と良好な塑性加工性と切削加
工性を併せ持つ優れた磁石材料として、１；’ Ｑ−Ｃ
ｒ−Ｇ ｏ系合金が知られており、この系の合金はロー
タリーエンコーダの磁気記録媒体用などとして利用され
ている。``Conventional technology''1;' Q-C has been used as an excellent magnet material that has both excellent magnetic properties and good plastic workability and cutting workability.
An r-Go type alloy is known, and this type of alloy is used for magnetic recording media of rotary encoders.
「発明が解決しようとする課題」
従来知られているロータリーエンコーダに用Ｌ１られて
いるＦ ｅ−Ｃｒ−Ｃｏ系の合金は、平均粒径が０５〜
２．０ｍｍ程度のらのであったが、従来のロータリーエ
ンコーダに用いられている磁気記録媒体から放出される
磁力線は不均一でエンコーダとしての精度向上に限界が
あった。これは、以下に説明する理由による乙のと推定
される。"Problems to be Solved by the Invention" The Fe-Cr-Co alloy used in conventionally known rotary encoders has an average grain size of
Although the radius was approximately 2.0 mm, the lines of magnetic force emitted from the magnetic recording medium used in conventional rotary encoders were non-uniform, and there was a limit to the improvement of accuracy as an encoder. This is presumed to be due to the reasons explained below.
まず、磁性を存する元素の単結晶の磁化変化を調べてみ
ると特定の結晶軸方向に磁化しやすく、特定の結晶軸方
向に磁化されにくい性質かある。First, if we examine the change in magnetization of a single crystal of an element that has magnetism, we will find that it tends to be easily magnetized in a specific crystal axis direction, and is less likely to be magnetized in a specific crystal axis direction.
即ち、例えば、鉄の単結晶に種々の方向から磁場を印加
して磁化させた場合、第６図に示すように、単結晶の［
＋００］方向とＣｌｌ０］方向と［１１１］方向で磁化
の大きさが異なることが知られている。That is, for example, when a single crystal of iron is magnetized by applying a magnetic field from various directions, as shown in FIG.
It is known that the magnitude of magnetization is different in the +00] direction, the Cll0] direction, and the [111] direction.
従ってこのような観点から前記従来のロータリーエンコ
ーダに用いられているＦ ｅ−Ｃｒ−Ｃｏ系合金につい
て検討すると、この合金の結晶粒の数が少ないときは、
個々の結晶粒の磁化の大きさの差が現れてきて発生ずる
磁場の大きさにバラツキが生じるために、磁力線が不均
一になり、エンコーダとしての精度向上に限界を生じる
ものと思われる。Therefore, when considering the Fe-Cr-Co alloy used in the conventional rotary encoder from this perspective, when the number of crystal grains in this alloy is small,
Differences in the magnitude of magnetization of individual crystal grains appear, causing variations in the magnitude of the generated magnetic field, making the lines of magnetic force non-uniform, which seems to place a limit on the improvement of accuracy as an encoder.
この発明は前記課題を解決するためになされた乙ので、
放出される磁力線を均一にすることができ、エンコーダ
の精度を高めることができる磁気式エンコーダ用磁気記
録媒体を提供ずろことを目的とする。Since this invention was made to solve the above problem,
It is an object of the present invention to provide a magnetic recording medium for a magnetic encoder that can make emitted lines of magnetic force uniform and improve the accuracy of the encoder.
［課題を解決するための手段」
請求項Ｉに記載した発明は前記課題を解決するために、
Ｃｒ ｌｏ〜４５重ｆｉ％
Ｇｏ ３〜３５重徂％
’ｒｉ、Ｚｒ，Ａｌのうし１種又は２種以上を０．１〜
２０重量％
Ｆ ｅ 残部
の組成を有し、
磁気検出素子に関与する媒体の面積をＳとし、平均粒径
をｄとした場合、
ｄ ≦ １７１０・５
の関係とした乙のである。[Means for Solving the Problems] In order to solve the above problems, the invention described in claim I provides the following methods: Cr lo~45wt% Go 3~35wt% 2 or more types from 0.1
The medium has a composition of 20% by weight with the remainder being F e , where S is the area of the medium involved in the magnetic sensing element, and d is the average particle size, the relationship d≦1710·5 is established.
請求項２に記載した発明は前記課題を解決するために、
Ｃｒ Ｉ Ｏ〜４５重量％、
Ｃｏ ３〜３５重槓％、
Ｔｉ、Ｚｒ，Ａｌのうち１種又は２種以上を０．１〜２
０玉虫％、
Ｖ 、Ｍｎ、Ｎ ｉ、Ｃｕ、Ｎｂ、Ｍｏ、Ｗのうち１種
または２種以上を５重量％以下、
Ｆｅ 残部
の組成を有し、
磁気検出素子に関与する媒体の面積をＳとし、平均粒径
をｄとした場合、
ｄ≦ ｌ／１０・Ｂ
の関係としたものであ−る。In order to solve the above problem, the invention described in claim 2 includes the following: Cr IO ~45% by weight, Co 3~35% by weight, and 0.1~45% of one or more of Ti, Zr, and Al. 2
0% by weight, one or more of V, Mn, Ni, Cu, Nb, Mo, and W at 5% by weight or less, the balance being Fe, and the area of the medium involved in the magnetic detection element is When S is the average particle diameter and d is the average particle diameter, the relationship is d≦l/10·B.
「作用 」
特定の組成のＦ ｅ−Ｃｒ−Ｃｏ系の合金を用い、平均
結晶粒度を特別の大きさにすることにより、検出素子に
関与する結晶粒の数が十分に多くなり、結晶粒の結晶方
位に起因する磁化の大きさの差が緩和されて放出される
磁力線が均一になる。``Effect'' By using Fe-Cr-Co alloy with a specific composition and making the average grain size a special size, the number of crystal grains involved in the detection element can be sufficiently increased, and the number of crystal grains can be increased. Differences in magnetization magnitude due to crystal orientation are relaxed, and the emitted lines of magnetic force become uniform.
以下に本願発明を更に詳細に説明する。The present invention will be explained in more detail below.
請求項１に記載した発明においては、Ｃｒ（クロム）１
０．〜４５重量％、Ｃｏ（コバルト９３〜３５重ｒｌｔ
％、１゛ｉ（ヂタン）、Ｚｒ（ジルコニウム）、Ａｌ（
アルミニウム）のうち１種以上を０．ｌ〜２０重積％、
Ｆｃ（鉄）残部の組成を仔することによって優れた磁石
特性と塑性加工性と切削加工性を併仕持ｆこせることが
できる。しから、磁気検出素子（例えばＭＲ素子などの
読み取りヘッド）に関与する媒体の面積（例えばＭ Ｒ
素子の検出部の面積）をＳとし、磁気記録媒体の平均粒
度をｄとした場合、ｄ≦１７１Ｏ√Ｓの関係を満たずよ
うにされている。In the invention described in claim 1, Cr (chromium) 1
0. ~45% by weight, Co (Co93~35wt rlt
%, 1゛i (ditane), Zr (zirconium), Al(
0.0. l ~ 20 weight%,
By adjusting the composition of the Fc (iron) remainder, it is possible to have excellent magnetic properties, plastic workability, and cutting workability. Therefore, the area of the medium (e.g. M R
When S is the area of the detection part of the element and d is the average grain size of the magnetic recording medium, the relationship d≦171O√S is not satisfied.
このような磁気記録媒体を製造するには、例えば、Ｆｅ
−２５Ｃｒ−１２Ｃｏ−０，１’ｌ’ｉの組成比の粉末
を作成し、この粉末を加圧成形した後に、１０００〜１
３００℃で加熱して焼結し、焼結体を９００〜！２００
℃で加熱した後に水冷処理などによって急冷する溶体化
処理を施し、次いて７００℃から温度を制御しつつ冷却
して時効する処理を行えば良い。また、磁気記録媒体を
製造する他の手段としては、前記組成の合金溶湯を溶製
し、鋳造して所定の組成比の鋳造品を作成し、この鋳造
品に熱間鍛造と熱間加工と冷間加工を施すといった塑性
加工を行い、塑性加工後に前述と同等の条件で温度と加
熱時間を制御しつつ溶体化処理を行い、次いて時効処理
を行うといった処理を行っても良い。To manufacture such magnetic recording media, for example, Fe
A powder with a composition ratio of -25Cr-12Co-0,1'l'i is prepared, and after pressure molding this powder,
Heating and sintering at 300℃ produces a sintered body with a temperature of 900~! 200
It is sufficient to perform a solution treatment in which the material is heated at a temperature of 0.degree. In addition, as another means of manufacturing magnetic recording media, a molten alloy having the above composition is melted and cast to create a cast product having a predetermined composition ratio, and this cast product is subjected to hot forging and hot working. Plastic working such as cold working may be performed, and after the plastic working, solution treatment may be performed under the same conditions as described above while controlling the temperature and heating time, followed by aging treatment.
以上の工程を経ることにより平均結晶粒径０゜０５〜２
ｍｍの種々の磁気記録媒体を得ることができる。By going through the above steps, the average crystal grain size is 0°05~2
mm various magnetic recording media can be obtained.
なお、前述の工程を行う場合には、Ｍｎ（マンガン）、
Ｓｉ（ケイ素）、Ｎｂ（ニオブ）、Ｍｏ（モリブデン）
■（バナジウム）、Ｎ ｉにッケル）、Ｃｕ（銅）のう
らから選択される１種または２種以上の元素を合計５重
用％以下添加して磁気記録媒体を製造しても良い。ここ
てＳｉ、Ｎｂ、Ｚｒ、Ｍｏ、Ｖ、Ｎｉなどの元素を添加
ずろことにより、磁気記録媒体の結晶粒を微細化するこ
とができる。In addition, when performing the above-mentioned process, Mn (manganese),
Si (silicon), Nb (niobium), Mo (molybdenum)
A magnetic recording medium may be manufactured by adding one or more elements selected from the group consisting of (vanadium), Ni (vanadium), and Cu (copper) in a total of 5% or less. By adding elements such as Si, Nb, Zr, Mo, V, and Ni, the crystal grains of the magnetic recording medium can be made finer.
以上説明したように得られた磁気記録媒体は、結晶粒が
十分に小さく、放出される磁力線が均一であるので、ロ
ータリーエンコーダ用として使用した場合に従来より特
性を向上できる効果がある。The magnetic recording medium obtained as described above has sufficiently small crystal grains and emitted lines of magnetic force are uniform, so that when used in a rotary encoder, it has the effect of improving characteristics compared to conventional media.
「実施例」
Ｆｅ−２５Ｃｒ−１２Ｇｏ−０、Ｉ Ｔｉの組成の合金
粉末を作成し、この合金粉末を２ ｔｏｎ／ ａｍｌの
加圧力で加圧成形して成形体を形成し、更にこの成形体
を１２００℃で焼結し、次いで１１００°Ｃに加熱した
後に水冷する溶体化処理を施した。続いてこの処理品を
７００°Ｃから温度制御しつつ制御冷却（５〜ｂ
た。"Example" An alloy powder having a composition of Fe-25Cr-12Go-0 and ITi was prepared, and this alloy powder was pressure-molded with a pressure of 2 ton/aml to form a compact, and further this compact was was sintered at 1200°C, then subjected to solution treatment by heating to 1100°C and cooling with water. Subsequently, the treated product was cooled under controlled temperature control from 700°C (5 to 50°C).
次に第１図に示すように検出部の寸法が縦３ ｍｍ。Next, as shown in Fig. 1, the size of the detection part is 3 mm in length.
１２ｍｍ、その面積か６ ｍｍ’のＭＲ素子（Ｍ ａｇ
ｎｅｔ。An MR element (Mag
net.
Ｒｅ５ｉｓＬｉｖｅ ＩＥ ｌｅｍｅｎｔ） ｆを用き
するとともに、ｎｆｊ記時効処理後に得られた処理品を
機械加工して円盤状のディスクを作成し、このディスク
の外周面に着磁して第２図に示すような回転ディスク２
を得た。Re5isLive IE element) f is used, and the processed product obtained after nfj aging treatment is machined to create a disk-shaped disk, and the outer peripheral surface of this disk is magnetized as shown in Figure 2. rotating disc 2
I got it.
この回転ディスク２を所定の速度で回転させてＭＲ素子
１を第２図に示すように回転ディスク２の外周部近傍に
設置して作動さＬ＋几場合、Ｍ ｒｚ素子ｌから第３図
に示４′ような波形出力が得られろ。When the rotating disk 2 is rotated at a predetermined speed and the MR element 1 is installed near the outer circumference of the rotating disk 2 as shown in FIG. You should be able to get a waveform output like 4'.
そしてこの波形出力の最大値と最小値の港の値をＡとし
た場合、回転ディスク全周でのＡの平均値を八とし、Δ
の最大値をＡ ｍａｘ、最小値をＡ ｍｉｎとした場合
に、
リ ソ プ ル − （（Ａ ｍａｘ −Ａ
ｍ１ｎ）／ Ａ ）Ｘ Ｉ ＯＯで示すこと
ができる。If the port values of the maximum and minimum values of this waveform output are A, then the average value of A over the entire circumference of the rotating disk is 8, and Δ
When the maximum value of is A max and the minimum value is A min, the solution − ((A max − A
m1n)/A)XIOO.
ここで前記のように製造された回転ディスク２において
、平均結晶粒径とリップルの関係を求めた。なお、前記
の工程を行う場合に、焼結’ＩＬ度、焼結時間などの条
件を種々変更して種々の平均結晶粒径の回転ディスクを
作成し、平均結晶粒径と前記リップルの関係を求め、そ
の結果を第４図に示した。更に、リップルとＮ（センサ
と結晶断面の面積比）の関係を求め第５図に示した。こ
の場合Ｎ ＝ Ｓ ／ｄ”の関係が成立ずろとと乙に、
第５図に示すリップルを５％以下にするには、Ｎを１０
０以上とすれば良いので前記式にこの値を代入し、更に
ＭＲ素子の検出部の面積であろ６を代入すると、ｄ≦１
／１０・√Ｓの関係が導きだける。Here, in the rotating disk 2 manufactured as described above, the relationship between the average crystal grain size and ripple was determined. In addition, when performing the above process, various conditions such as sintering 'IL degree and sintering time are changed to create rotating disks with various average crystal grain sizes, and the relationship between the average crystal grain size and the ripple is determined. The results are shown in Figure 4. Furthermore, the relationship between the ripple and N (area ratio between the sensor and the crystal cross section) was determined and shown in FIG. In this case, the relationship "N = S / d" is established, and
To reduce the ripple shown in Figure 5 to 5% or less, N is 10
It only needs to be 0 or more, so by substituting this value into the above equation and further substituting 6, which is the area of the detection part of the MR element, d≦1.
/10・√S relationship can be derived.
従って磁気記録媒体の平均結晶粒径ｄをＩ ／ ｌ Ｏ
、／Ｕ以下にずろならば、リップルを５％以下にてさる
ことが判明した。Therefore, the average grain size d of the magnetic recording medium is I / l O
, /U or less, it has been found that the ripple can be reduced to 5% or less.
「発明の効果」
以」二説明したようにこの発明の磁気記録媒体は、特別
な組成を灯し、平均結晶粒径を一定の大きさ以下にして
いるので、磁石特性と組成加工性と切削１＋ｏＴ性に優
れた旧に、放出される磁力線が従来の磁気記録媒体より
更に均一な特徴がある。従ってこの発明の磁気記録媒体
を用いてエンコーダを製造することにより、従来のエン
コーダより精度高いエンコーダを製造できる効果がある
。``Effects of the Invention'' As explained hereinafter, the magnetic recording medium of the present invention has a special composition and the average crystal grain size is kept below a certain level, so that it has improved magnetic properties, composition processability, and machinability. Although it has excellent 1+oT properties, it has the characteristic that the lines of magnetic force emitted are more uniform than those of conventional magnetic recording media. Therefore, by manufacturing an encoder using the magnetic recording medium of the present invention, it is possible to manufacture an encoder with higher accuracy than conventional encoders.
第１図はＭＲ素子の側面図、
第２図はＭ［Ｘ子による回転ディスクの情報読み取り状
態を示す斜視図、
第３図は回転ディスクの回転方向とＭＲ素子の出力の関
係を示すグラフ、
第４図はリップルと平均結晶粒径の関係を示すグラフ、
第５図はリップルとＮの関係を示すグラフ、第６図は鉄
の単結晶に対する磁場の方向による磁化の状態を示すグ
ラフである。Fig. 1 is a side view of the MR element, Fig. 2 is a perspective view showing the state of information reading of the rotating disk by the M[X element, Fig. 3 is a graph showing the relationship between the rotation direction of the rotating disk and the output of the MR element, Figure 4 is a graph showing the relationship between ripple and average grain size, Figure 5 is a graph showing the relationship between ripple and N, and Figure 6 is a graph showing the state of magnetization of iron single crystals depending on the direction of the magnetic field. .
Claims (2)
．０重量％、 Ｆｅ残部 の組成を有し、 磁気検出素子に関与する磁気記録媒体の面積をＳとし、
平均結晶粒径をｄとした場合、 ｄ≦１／１０・√Ｓ の関係としたことを特徴とする磁気式エンコーダ用磁気
記録媒体。(1) 10 to 45% by weight of Cr, 3 to 35% by weight of Co, and 0.1 to 2% of one or more of Ti, Zr, and Al.
．． It has a composition of 0% by weight and the remainder is Fe, and the area of the magnetic recording medium involved in the magnetic detection element is S,
A magnetic recording medium for a magnetic encoder, characterized in that, where d is an average crystal grain size, the relationship d≦1/10·√S is satisfied.
．０重量％、 Ｖ，Ｍｎ，Ｎｉ，Ｃｕ，Ｎｂ，Ｍｏ，Ｗのうち１種また
は２種以上を５重量％以下、 Ｆｅ残部 の組成を有し、 磁気検出素子に関与する媒体の面積をＳとし、平均結晶
粒径をｄとした場合、 ｄ≦１／１０・√Ｓ の関係としたことを特徴とする磁気式エンコーダ用磁気
記録媒体。(2) 10 to 45% by weight of Cr, 3 to 35% by weight of Co, and 0.1 to 2% of one or more of Ti, Zr, and Al.
．． 0% by weight, 5% by weight or less of one or more of V, Mn, Ni, Cu, Nb, Mo, and W, and the remainder Fe, and the area of the medium involved in the magnetic sensing element is S. A magnetic recording medium for a magnetic encoder, characterized in that, where d is an average crystal grain size, the relationship d≦1/10·√S is satisfied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63211795A JPH0612264B2 (en) | 1988-08-26 | 1988-08-26 | Magnetic recording medium for magnetic encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63211795A JPH0612264B2 (en) | 1988-08-26 | 1988-08-26 | Magnetic recording medium for magnetic encoder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0261519A true JPH0261519A (en) | 1990-03-01 |
| JPH0612264B2 JPH0612264B2 (en) | 1994-02-16 |
Family
ID=16611733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63211795A Expired - Fee Related JPH0612264B2 (en) | 1988-08-26 | 1988-08-26 | Magnetic recording medium for magnetic encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612264B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0514038A2 (en) * | 1991-05-16 | 1992-11-19 | Mitsubishi Steel Mfg. Co., Ltd. | Printing machine |
| WO2006075572A1 (en) * | 2005-01-11 | 2006-07-20 | Ntn Corporation | Magnetic encoder and wheel bearing comprising same |
-
1988
- 1988-08-26 JP JP63211795A patent/JPH0612264B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0514038A2 (en) * | 1991-05-16 | 1992-11-19 | Mitsubishi Steel Mfg. Co., Ltd. | Printing machine |
| WO2006075572A1 (en) * | 2005-01-11 | 2006-07-20 | Ntn Corporation | Magnetic encoder and wheel bearing comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0612264B2 (en) | 1994-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |