JPH02178639A - Plate for light shielding blade - Google Patents
Plate for light shielding bladeInfo
- Publication number
- JPH02178639A JPH02178639A JP63331749A JP33174988A JPH02178639A JP H02178639 A JPH02178639 A JP H02178639A JP 63331749 A JP63331749 A JP 63331749A JP 33174988 A JP33174988 A JP 33174988A JP H02178639 A JPH02178639 A JP H02178639A
- Authority
- JP
- Japan
- Prior art keywords
- carbon black
- sheets
- reinforced resin
- thickness
- light shielding
- 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
- 229920005989 resin Polymers 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 37
- 239000006229 carbon black Substances 0.000 claims abstract description 31
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 13
- 239000004917 carbon fiber Substances 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 25
- 238000010030 laminating Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 28
- 210000003491 skin Anatomy 0.000 description 13
- 239000007788 liquid Substances 0.000 description 8
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002243 precursor Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
Ａ、産業上の利用分野
本発明は、カメラのフォーカルプレンシャッタやレンズ
シャッタのシャッタ羽根または絞り羽根のように、高速
で運動する事が要求される遮光羽根用の板材に関する。Detailed Description of the Invention A. Industrial Field of Application The present invention is directed to a plate material for light-shielding blades that are required to move at high speed, such as shutter blades or aperture blades of focal plane shutters or lens shutters of cameras. Regarding.
Ｂ、従来の技術
上記の如き遮光羽根は、作動力量を小さくし、かつ曲げ
剛性も十分に保ちながら高速に作動させることが望まし
く、そのためには、軽量、高強度高剛性の遮光羽根が必
要となる。この種の遮光羽根として従来から、本出願人
による特開昭５９−６１８２７号公報に開示されている
ように、一方向に揃えられた炭素繊維の連続繊維で強化
された強化樹脂シート（以下、単にＣＦＲＰと略す）を
その繊維方向が互いに直交またはほぼ直交するようにか
つ厚さ方向に面対称に複数枚積層させて構成した遮光羽
根用板材が知られている。しかしながら、この種の遮光
羽根用板材はその薄さに起因してピンホールのような遮
光性のない部分が点在してしまうという欠点があった。B. Prior art It is desirable for the above-mentioned light-shielding blades to be operated at high speed while reducing the amount of actuation force and maintaining sufficient bending rigidity, and for this purpose, light-weight, high-strength and high-rigidity light-shielding blades are required. Become. As disclosed in Japanese Patent Application Laid-open No. 59-61827 by the present applicant, this type of light-shielding blade has been conventionally known as a reinforced resin sheet reinforced with continuous carbon fibers aligned in one direction (hereinafter referred to as A light-shielding blade plate material is known, which is constructed by laminating a plurality of sheets of CFRP (abbreviated simply as CFRP) so that their fiber directions are perpendicular or nearly perpendicular to each other and symmetrical in the thickness direction. However, this type of light-shielding blade plate material has a drawback in that it is dotted with pinhole-like areas that do not have light-shielding properties due to its thinness.
このような欠点を改良した遮光羽根用板材として特開昭
６３−１７４３５号公報に開示されているものが知られ
ている。A plate material for light-shielding blades that has improved this drawback is disclosed in Japanese Unexamined Patent Publication No. 17435/1983.
これは、硬化前のＣＦＲＰのマトリックス樹脂中にカー
ボンブラックを配合して成るプリプレグ・シートを複数
枚、例えば３枚あるいは５枚のシートを上述したと同様
に積層し加圧硬化させて成るものである。This is made by laminating a plurality of prepreg sheets, for example, three or five sheets, which are made by blending carbon black into a CFRP matrix resin before curing, in the same manner as described above, and then curing them under pressure. be.
Ｃ０発明が解決しようとする課題
しかしながら、カーボンブラックはマトリックス樹脂中
への分散性があまり良くないため厚さの精度を厳しくし
ようとするとプリプレグ・シートの生産コストが上がる
上、カーボンブラックを配合したプリプレグ・シートは
極めて特殊な用途にのみ用いられるため汎用性がなくこ
の種のプリプレグ・シートは高価である。したがって、
従来のように表皮層、中間層の全層にカーボンブラック
添加のプリプレグ・シートを用いると板材が高価となる
欠点があった。Problems to be Solved by the C0 Invention However, carbon black does not have very good dispersibility in matrix resins, so if you try to tighten the thickness precision, the production cost of prepreg sheets increases, and prepregs containing carbon black - This type of prepreg sheet is expensive because it is not versatile because the sheet is used only for very specific purposes. therefore,
If a prepreg sheet containing carbon black is used in all layers, including the skin layer and the intermediate layer, as in the past, there is a drawback that the plate material becomes expensive.
本発明の技術的課題は、コストをさほどアップさせずに
カーボンブラックにより板材の遮光性などを向上させる
ことにある。A technical object of the present invention is to improve the light-shielding properties of a plate material using carbon black without significantly increasing costs.
００課題を解決するための手段および作用本発明に係る
遮光羽根用板材は、一方向に揃えられた炭素繊維の連続
繊維とこれを包含するマトリックス樹脂とからなる強化
樹脂シート３枚以上を、各シートの繊維方向が互いに直
交またはほぼ直交するように、かつ厚さ方向に面対称に
なるよう、積層してなる板厚が６０〜１２０μの炭素繊
維強化樹脂製板材であって、表皮層（表面と裏面の両方
の表皮層のこと）のシートにのみカーボンブラックを配
合したものである。Means and Function for Solving the Problems The light-shielding blade plate material according to the present invention comprises three or more reinforced resin sheets each made of continuous carbon fibers aligned in one direction and a matrix resin containing the continuous fibers. A carbon fiber-reinforced resin plate material with a thickness of 60 to 120μ formed by laminating sheets so that the fiber directions of the sheets are perpendicular or almost perpendicular to each other and plane symmetrical in the thickness direction. Carbon black is added only to the sheet (both the outer layer and the back skin layer).
遮光羽根用板材は、ＣＦＲＰの前駆体であるプリプレグ
・シート（ｐｒｅｐｒｅｇ ５ｈｅｅｔ）を複数枚積層
（その繊維方向は互いに直交またはほぼ直交するように
積層する）シ、この積層物全体をプレスしたまま加熱し
て硬化させることにより製造する。プリプレグ・シート
は、炭素繊維の連続繊維を一方向に揃えて薄く板状に並
べ、これにマトリックス樹脂の前駆体である熱硬化性樹
脂液（例えばエポキシ樹脂や不飽和ポリエステルの未硬
化液状物）を含浸させ、該樹脂液をＢステージ状態（−
溶固化しており明白な流動性はないが、加熱すれば最終
的な硬化が可能な状態）にしたものである。The board material for the light-shielding blades is made by laminating a plurality of prepreg sheets (prepreg 5sheets), which are precursors of CFRP (laminated so that the fiber directions are perpendicular or almost perpendicular to each other), and heating the entire laminate while it is pressed. Manufactured by curing. Prepreg sheets are made by arranging continuous carbon fibers in a thin plate shape in one direction, and then applying a thermosetting resin liquid (e.g. epoxy resin or uncured liquid unsaturated polyester) which is a precursor of the matrix resin. The resin liquid is brought to a B stage state (-
Although it has been solidified and has no obvious fluidity, it can be finally hardened by heating.
本発明の板材を得るには、少なくとも表皮層に表裏両面
各１枚のプリプレグ・シート、中間層に１枚のプリプレ
グ・シートを用意する必要がある。In order to obtain the plate material of the present invention, it is necessary to prepare at least one prepreg sheet for each of the front and back surfaces for the skin layer, and one prepreg sheet for the intermediate layer.
表皮層に使用するプリプレグ・シートを作製する際に、
マトリックス樹脂の前駆体となる樹脂液中にカーボンブ
ラックを添加分散させておくか、またはカーボンブラッ
クを高濃度に混合した樹脂液を別途用意し、これをロー
ルコータ−等を使用して通常のプリプレグ・シートに圧
入浸透させる。When producing the prepreg sheet used for the epidermal layer,
Carbon black is added and dispersed in the resin liquid that is the precursor of the matrix resin, or a resin liquid with a high concentration of carbon black is prepared separately, and this is coated with a normal prepreg using a roll coater etc.・Press infiltrate into the sheet.
カーボンブラックは、平均粒子径０．０７μｍ以下のも
のが好ましく、添加量は樹脂液（固形分１００重量部）
に対し５〜１５重量％が好ましい。Carbon black preferably has an average particle diameter of 0.07 μm or less, and the amount added is the resin liquid (solid content: 100 parts by weight)
It is preferably 5 to 15% by weight.
カーボンブラック配合の表皮層とカーボンブラック無添
加の中間層となる各プリプレグ・シートを作成した後、
表皮層と中間層とが炭素繊維の方向が互いに直交または
ほぼ直交するように、かつ中央面から厚さ方向に面対称
となるように、２種類のプリプレグ・シートを少なくと
も３枚以上、例えば３枚、４枚、５枚重ね合わせ、その
上で加熱プレス成形して板材とする。これにより樹脂は
架橋硬化して固まる。After creating each prepreg sheet, which will be the skin layer containing carbon black and the middle layer without adding carbon black,
At least three or more prepreg sheets of two types, for example three One sheet, four sheets, five sheets are stacked on top of each other, and then heated and press-molded to form a plate material. This causes the resin to crosslink and harden.
本発明に用いるプリプレグ・シートの樹脂量は３０〜５
０重量％であり、好ましくは３８％〜４８％に規定する
。樹脂量が少ないと、カーボンブラックを配合したとき
次のような問題が生ずる。The amount of resin in the prepreg sheet used in the present invention is 30 to 5
0% by weight, preferably 38% to 48%. If the amount of resin is small, the following problems will occur when carbon black is blended.
すなわち、樹脂量が少ないと炭素繊維の配列が悪くなり
表皮層の内部応力分布が悪化し、その結果、平面性悪化
が生じてしまい、良品率が極端に下がる。また、外観上
空孔や微細クラックの発生がみられ、塗装性も悪化する
。またその表面に凹凸が生じるので耐摩耗性、潤滑性も
劣り、さらには美観も損ねる。さらにまた、樹脂量が少
ないと樹脂フローの際、縞模様となって現れる事があり
。That is, if the amount of resin is small, the alignment of the carbon fibers will be poor and the internal stress distribution of the skin layer will be deteriorated, resulting in deterioration in flatness and an extremely low yield rate. In addition, pores and microcracks appear on the exterior, and paintability deteriorates. Moreover, since the surface becomes uneven, the wear resistance and lubricity are poor, and the appearance is also impaired. Furthermore, if the amount of resin is small, a striped pattern may appear during resin flow.
これも外観上好ましくない。This is also unfavorable in terms of appearance.
そこで、上述したように樹脂量を規定することにより、
カーボンブラック添加に伴う欠点を解決できる。Therefore, by specifying the amount of resin as described above,
This can solve the drawbacks associated with the addition of carbon black.
板材の厚さは、用途の都合で６０〜１２０μとなるよう
にする。したがってプリプレグ・シート１層は１０〜６
０μ程度のものであり、炭素繊維目付（１ｍ２当り何ｇ
の炭素繊維が含まれるか）では１０ ｇ／ｍ２〜６０ｇ
／ｍ”のものを用いる。なお、プリプレグ・シートは全
て同じ板厚である必要はなく、中立面に対して厚さ方向
に面対称になるように使用すればいろいろな板厚、いろ
いろな目付のものを組み合わせることも可能である。も
し板厚が規定値以内に入るものであれば、全体の曲げ剛
性を上げるため中間層の板厚や目付を表皮層（この場合
は、表面または裏面のＩＷＪのみを指す）よりも厚くあ
るいは多くする方が有利となる。The thickness of the plate material is set to 60 to 120 μm depending on the purpose of use. Therefore, one layer of prepreg sheet has 10 to 6
It is about 0μ, and the carbon fiber basis weight (how many grams per 1m2)
10 g/m2 to 60 g
/m". Note that all prepreg sheets do not need to have the same thickness; if they are used so that they are symmetrical in the thickness direction with respect to the neutral plane, various thicknesses and various thicknesses can be used. It is also possible to combine materials with different fabric weights.If the plate thickness is within the specified value, the thickness and fabric weight of the intermediate layer can be changed to the surface layer (in this case, the front or back surface) in order to increase the overall bending rigidity. It is advantageous to make the IWJ thicker or larger than the IWJ (referring only to the IWJ).
こうして得られた板材は、表皮層にのみカーボンブラッ
ク添加のシートを用いて所望の遮光性。The plate material thus obtained has the desired light-shielding properties by using a sheet containing carbon black only in the skin layer.
平面性、′ｆＪ１滑性が得られ、また、ドライループ（
反射光を無くす黒色塗料）塗装性の問題のないものとな
った。ドライループ塗装は、反射を無くすためと、外観
と遮光性および潤滑性の付与の点から実施するが、反射
を無くし外観を良好なものとするには、カーボンブラッ
ク無添加の表皮層を用いた従来例では、上記目的を達成
するためにかなり厚く塗布する必要があり相対的に厚さ
のバラツキが生じてしまい不良品の発生につながってい
た。しかしカーボンブラック入りプリプレグを表皮層に
用いる事でこのドライループ膜の塗布量を少なくでき相
対的に膜厚のバラツキを少なくできた。Flatness and 'fJ1 smoothness are obtained, and dry loop (
(Black paint that eliminates reflected light) No problems with paintability. Dry loop painting is carried out to eliminate reflections and to provide appearance, light-shielding properties, and lubricity, but in order to eliminate reflections and provide a good appearance, a surface layer without carbon black additives is used. In the conventional example, in order to achieve the above objective, it was necessary to apply the coating quite thickly, resulting in relative variations in thickness, which led to the occurrence of defective products. However, by using carbon black-containing prepreg for the skin layer, we were able to reduce the amount of dry loop film applied and relatively reduce the variation in film thickness.
なお、樹脂１００重量部当りカーボンブラック量が５重
量％未満の板材は、カーボンブラックが添加されていて
も、本発明でいうカーボンブラック無添加の板材に含ま
れる。Note that a plate material containing less than 5% by weight of carbon black per 100 parts by weight of resin is included in the term "carbon black-free plate material" as used in the present invention, even if carbon black is added thereto.
また、カーボンブラックの添加量は、５重量％未満では
遮光効果を十分発揮できず１５重量％以上では繊維の配
列が悪くなりすぎ平面性に悪影響を及ぼす、また樹脂液
の流動性も悪くなりすぎるため内部に空孔が発生したり
、層間剥離が起きたりする。従って、５〜１５重量％（
当樹脂１００重量部当り）添加することが好ましい。In addition, if the amount of carbon black added is less than 5% by weight, the light shielding effect cannot be sufficiently exhibited, and if it is more than 15% by weight, the alignment of the fibers will be too poor, which will have a negative effect on the flatness, and the fluidity of the resin liquid will also be too poor. As a result, pores may be generated inside or delamination may occur. Therefore, 5 to 15% by weight (
(per 100 parts by weight of the resin) is preferably added.
Ｅ、実施例
（１）平均粒子径０．０２μのカーボンブラックを樹脂
１００重量当り１０重量％添加し十分混合したエポキシ
系樹脂液を、一方向に揃えた炭素繊維に含浸させ、樹脂
をＢステージ化させることにより、炭素繊維日付が２０
ｇ／ｒｄのプリプレグ・シートＡ（樹脂含有率約４３
重量％）を作成した。E. Example (1) Carbon fibers aligned in one direction are impregnated with an epoxy resin liquid in which 10% by weight of carbon black with an average particle size of 0.02μ is added per 100 weight of resin and thoroughly mixed, and the resin is placed in the B stage. By changing the carbon fiber date to 20
g/rd prepreg sheet A (resin content approx. 43
% by weight) was created.
（２）カーボンブラックを添加しない外は、はぼ前項（
１）と同様にして、同じ目付のプリプレグ・シートＢ（
樹脂含有率約４０重量％）を作成した。(2) Except for not adding carbon black, the previous section (
In the same manner as in 1), prepreg sheet B (
The resin content was approximately 40% by weight).
（３）上記シートＡ２枚とシート８２枚を用意し、繊維
方向がＯ”／９０°／９０″′１０°となるように、か
つシートの種類がＡ／Ｂ／Ｂ／Ａとなるように、上記４
枚を面対称にＩＢＭし、１３０℃の温度で５〜１５ｋｇ
／ｃＪの圧力をかけ、１〜２時間で硬化させ、その後徐
冷させて板厚９０〜１００μの板材を得た。(3) Prepare the above 2 sheets A and 82 sheets, so that the fiber direction is O''/90°/90'''10° and the sheet type is A/B/B/A. , above 4
IBM the sheet symmetrically, 5 to 15 kg at a temperature of 130℃
A pressure of /cJ was applied to cure the material for 1 to 2 hours, and then it was slowly cooled to obtain a plate material with a thickness of 90 to 100 μm.
この板材は表皮層のみ高価なカーボンブラック添加のプ
リプレグ・シートＡを用いており、従来の全層にカーボ
ンブラックを配合するものに比べてコスト低減が可能と
なった。また、平面性、遮光性、潤滑性および外観も良
好であった。This board material uses prepreg sheet A containing expensive carbon black only in the skin layer, making it possible to reduce costs compared to conventional sheets in which carbon black is added to all layers. Moreover, the flatness, light shielding property, lubricity and appearance were also good.
この板材から打抜いて得られた遮光羽根を使用してシャ
ッタ耐久試験をしたところ、強度的に優れたものとなっ
ているため、駆動力を伝達するための連結部の強度が向
上し、耐久性能が向上した。When we conducted a shutter durability test using light-shielding blades punched from this plate material, we found that they had excellent strength, so the strength of the connecting part for transmitting driving force was improved, and the blades were durable. Improved performance.
なお、中間層としてのプリプレグ・シートＢは、は同じ
目付又は別の目付のものを１枚又は３枚以上で構成して
もよいし、上記実施例のように２枚で構成してもよい。The prepreg sheet B serving as the intermediate layer may be composed of one or three or more sheets of the same or different basis weight, or may be composed of two sheets as in the above example. .
２枚以上で構成することは、面対称となるように、その
繊維方向を決める必要がある。When configuring it with two or more sheets, it is necessary to determine the fiber direction so that the fibers are symmetrical in plane.
Ｆ１発明の効果
本発明によれば、表皮層にのみカーボンブラックを添加
したシートを用いたので、低コストの遮光羽根用板材を
得ることができる。しかも、全層にカーボンブラックを
添加したのと同等の遮光性。F1 Effects of the Invention According to the present invention, since a sheet in which carbon black is added only to the skin layer is used, a low-cost light-shielding blade plate material can be obtained. What's more, it has the same light-shielding properties as adding carbon black to the entire layer.
平面性、潤滑性、塗装性が得られる。Provides flatness, lubricity, and paintability.
その外、本発明の板材を打抜いて遮光羽根とし、これを
駆動部材とカシメにより連結した場合、カシメの箇所が
曲げられるので、そのままでは盛り上がりが発生し、そ
のため羽根の平面性が損なわれて、■駆動抵抗が増加す
る、■幕間露光が発生するという欠点が生じる。In addition, when the sheet material of the present invention is punched out to form a light-shielding blade and this is connected to the drive member by caulking, the caulked part will be bent, so if it is left as it is, a bulge will occur, which will impair the flatness of the blade. , (2) Driving resistance increases, and (2) Intermission exposure occurs.
しかし、曲げたとき内側となる表皮層にのみ折りを入れ
ると、盛り上がりが発生しないことが判った。この場合
、内側となる表皮層に折りを入れると、仮に中間層にカ
ーボンブラックが添加されていると比較的脆くなるので
、折りが中間層まで伝播し１羽根としての強度低下を招
く。しかしながら、中間層にカーボンブラックが添加さ
れていないと比較的靭性があるので、折りは内側の表皮
層のみで止まり、中間層まで折れることはない。However, it has been found that if the folds are made only in the inner skin layer when bent, no bulging occurs. In this case, if the inner skin layer is folded, if carbon black is added to the intermediate layer, it will become relatively brittle, and the fold will propagate to the intermediate layer, resulting in a decrease in the strength of the blade. However, if carbon black is not added to the intermediate layer, it is relatively tough, so the folding stops only at the inner skin layer and does not extend to the intermediate layer.
なお、このとき中間層が塑性変形して曲率がゆるくなる
ので、外側の表皮層は比較的脆いものの。Note that at this time, the middle layer undergoes plastic deformation and its curvature becomes loose, so the outer skin layer is relatively brittle.
折れずに済む０本発明の板材はこのような効果を有する
。The plate material of the present invention, which does not break, has such an effect.
特許出願人 株式会社二コン 代理人弁理士 永 井 冬 紀Patent applicant: Nikon Co., Ltd. Representative Patent Attorney Fuyuki Nagai
Claims (1)
るマトリックス樹脂とからなる強化樹脂シート３枚以上
を、各シートの繊維方向が互いに直交またはほぼ直交す
るように面対称に積層してなる板厚が６０〜１２０μの
炭素繊維強化樹脂製板材において、表皮層のシートにの
みカーボンブラックが配合されていることを特徴とする
遮光羽根用板材。Three or more reinforced resin sheets made of continuous carbon fibers aligned in one direction and a matrix resin containing them are laminated in a plane symmetrical manner so that the fiber directions of each sheet are orthogonal or almost orthogonal to each other. A plate material for a light-shielding blade, characterized in that the plate material is made of carbon fiber reinforced resin and has a thickness of 60 to 120 microns, and carbon black is blended only in the sheet of the skin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63331749A JP2605850B2 (en) | 1988-12-29 | 1988-12-29 | Plate material for shading blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63331749A JP2605850B2 (en) | 1988-12-29 | 1988-12-29 | Plate material for shading blades |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02178639A true JPH02178639A (en) | 1990-07-11 |
| JP2605850B2 JP2605850B2 (en) | 1997-04-30 |
Family
ID=18247185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63331749A Expired - Lifetime JP2605850B2 (en) | 1988-12-29 | 1988-12-29 | Plate material for shading blades |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605850B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0695210A (en) * | 1992-08-24 | 1994-04-08 | Nikon Corp | Light shielding vane of ultra-high-speed vertically running focal plane shutter exceeding 1/4000 second |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62109032A (en) * | 1985-11-08 | 1987-05-20 | Nippon Kogaku Kk <Nikon> | Sheet material for light shielding vane and its production |
| JPS6317435A (en) * | 1986-07-09 | 1988-01-25 | Toho Rayon Co Ltd | Shutter vane made of carbon fiber reinforced thermosetting resin for camera |
-
1988
- 1988-12-29 JP JP63331749A patent/JP2605850B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62109032A (en) * | 1985-11-08 | 1987-05-20 | Nippon Kogaku Kk <Nikon> | Sheet material for light shielding vane and its production |
| JPS6317435A (en) * | 1986-07-09 | 1988-01-25 | Toho Rayon Co Ltd | Shutter vane made of carbon fiber reinforced thermosetting resin for camera |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0695210A (en) * | 1992-08-24 | 1994-04-08 | Nikon Corp | Light shielding vane of ultra-high-speed vertically running focal plane shutter exceeding 1/4000 second |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2605850B2 (en) | 1997-04-30 |
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