JP2756249B2 - Method of manufacturing rubber elastic anti-glare sheet part - Google Patents
Method of manufacturing rubber elastic anti-glare sheet partInfo
- Publication number
- JP2756249B2 JP2756249B2 JP62306532A JP30653287A JP2756249B2 JP 2756249 B2 JP2756249 B2 JP 2756249B2 JP 62306532 A JP62306532 A JP 62306532A JP 30653287 A JP30653287 A JP 30653287A JP 2756249 B2 JP2756249 B2 JP 2756249B2
- Authority
- JP
- Japan
- Prior art keywords
- silicone rubber
- rubber material
- thin layer
- transparent
- sheet
- 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 - Fee Related
Links
- 229920001971 elastomer Polymers 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920002379 silicone rubber Polymers 0.000 claims description 30
- 239000004945 silicone rubber Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 24
- 238000003475 lamination Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はゴム弾性防眩シート部品、とくには不要な外
部光を遮り、内部表示部のコントラストを良好にし、可
視角度範囲を調節できる遮光、防眩、識別などの機能を
有する、薄型高精度のゴム弾性防眩シート部品の製造方
法に関するものである。
（従来の技術とその問題点）
従来の製造方法には、加圧プレスまたはロールを用い
て作製した単層の着色または不透明の（以下単に「遮
光」と称する）シートまたはフイルム（以下「フイル
ム」で代表する）と、同様にして作製した単色の透明の
（以下単に「透明」と称する）フイルムとを交互多重に
重ね合せて接合一体化し、積層方向に薄切りして、その
表面に遮光層と透明層とが交互多重に積層されてなる縞
模様を有する縞模様シートを得る方法（特開昭51−4418
6号公報）があるが、この方法では積層の際にピッチミ
スが起り易く、商品価値を低下させるばかりでなく、不
良率発生の原因となっていた。また厚さ１〜10μｍのフ
ィルム、特には遮光フィルムは通常プラスチックに多量
のカーボンブラック、充填剤、着色剤を混合する関係
上、膜の破れやピンホールが生じ易く、特にフイルム状
物の作製が困難であった。
さらに、塩化ビニル樹脂、アクリル樹脂、セルロース
誘導体などの熱可塑性樹脂製の多数枚の透明フィルム
を、着色剤を均一に配合した着色接着剤を介して積層圧
着一体化してブロックとし、これをフィルム面に対して
直角ないし所定の角度を有する面で平削りして、透明部
分と着色遮光部分とが平行して交互に配置された縞状模
様シートとし、この平削りシートの両面に表面保護用の
フィルム、シートないし板を張り合せて一体化する、微
細スダレ状遮光板の製造方法（特開昭50−77653号公
報）も知られているが、得られる微細スダレ状遮光板を
構成する透明部分がプラスチックからなるものであるた
め、剛直で柔軟性にかけるほか曲げなどの変形に対して
の復元性や耐熱性に乏しい（例えば、真夏の直射日光下
に放置された密閉車内では熱変形を生じたり、プラスチ
ック中に配合された可塑剤などが揮発して臭気を生じ
る）ため、湾曲部への適用や高温下での使用に制約があ
った。
（問題点を解決するための手段）
本発明は、遮光フィルムおよび透明フィルムの厚さを
１〜10μｍの範囲内で任意に選択することができるほ
か、柔軟性（ゴム弾性）と耐熱性に富み任意の曲面に加
工でき、高精度の極小ピッチでムラのないゴム弾性防眩
シート部品の製造方法を提供しようとするもので、遮光
シリコーンゴム材料と透明シリコーンゴム材料とのいず
れか一方のシリコーンゴム材料を薄層片とし、その表面
に他方のシリコーンゴム材料を層状にスプレーして乾燥
後の厚さで１〜10μｍの薄層とし、これに一方のシリコ
ーンゴム材料の薄層片を積み重ね、さらにその表面に他
方のシリコーンゴム材料を層状にスプレーして薄層にす
るという操作を反復して所定の厚さにした後、加圧また
は加熱加圧下に積層一体化して交互多重の多層ブロック
とし、これを積層面に対して所定の角度をなす面でスラ
イスして、その表面に着色または不透明層と透明層とが
交互多重に積層されてなる縞模様を有するシートを作製
することを特徴とするものである。
（実施例）
次に、本発明の詳細を第１図に示した実施例に基づい
て説明する。
透明性良好なシリコーンゴムKE−1571u（信越化学工
業社製、商品名）100重量部と加硫剤Ｃ−２（同上）２
重量部とを配合して製膜した、透明シリコーンゴム材料
の薄層片１としての、厚さ100μｍの加硫済の透明シリ
コーンゴムフィルムの表面に、シリコーンゴムＸ−32−
389のＡおよびＢ（各同上）をそれぞれ1:1の割合で配合
したもの100重量部、カーボンブラック３重量部、酸化
鉄３重量部、トルエン40重量部からなる塗液を、スプレ
ーガンにより層状にスプレーして、遮光シリコーンゴム
材料の薄層２としての、厚さ３μｍの黒色膜を作製した
後、この上に上記と同じ透明シリコーンゴムフィルムを
積み重ね、さらにその上に同様に層状にスプレーして黒
色膜を作製するという操作を多重に反復して（図ａ、ｂ
参照）、透明シリコーンゴム材料からなる薄層片１と遮
光シリコーンゴム材料からなる薄層２とを、100mmの厚
さになるまで交互多重に積み重ねた。
この積層物に5kg/cm2の加圧処理を24時間行った後、1
30℃で１時間の加熱処理により一体化し、縞状の多層ブ
ロック３を作製した。次に、これを0.5cmと50μｍの厚
さで積層面に対して所定の角度をなす平行な面でスライ
スして、それぞれその表面に遮光シリコーンゴム材料の
薄層と透明シリコーンゴム材料の薄層片とが交互多重に
配列されてなる縞模様を有する、２種類のゴム弾性防眩
シートとしての縞模様シート４を作製した（図ｃ参
照）。
得られた縞模様シート４は、透明シリコーンゴム材料
層５の積層方向における厚さが100μｍで、遮光シリコ
ーンゴム材料層６のそれが３μｍである、厚さが0.5cm
と50μｍの２種類の100mm角のもので、いずれも黒色膜
が極薄であるにも拘らずピンホールなどの破れがなく、
しかもピッチミスが殆どなく、従来の方法に比べて歩留
まりが数倍向上し、防眩シート部品として好適なもので
あった。
また、この防眩シート部品を構成する遮光フィルム、
透明フィルムともシリコーンゴムからなるので、耐熱
性に優れ、高温（80〜150℃）下に放置されても、プラ
スチックからなるものが熱変形したり低揮発分が揮発し
て透明層が曇化したり臭気を発生したりするのに対し
て、そのようなことがなく、車載用などの耐熱性の要求
される用途にも適用できる；屈曲自在で各種の曲面
（例えば、ブラウン管）に対して単に押し当てるだけで
ぴったりと密着させることができ、従って防眩性の設計
に際しての自由度が大きい；曲げた後に曲げ応力を解
除すると容易に元のシートに戻すことができ、現場合わ
せが自由である；いずれか一方をスプレーにより積み
重ねていることと併せて、１〜10μｍの厚さであるにも
拘らず各層のピンホールや破れがないので防眩ムラがな
い；ガス透過性がよく、このため積層界面に溶剤に起
因する気泡が生ずることがなく、輝度ムラ、ピッチムラ
（平行性）のない防眩シートが得られる；などの利点を
有するものであった。
本発明は上記実施例に限定されるものではなく、例え
ば、これに使用する遮光シリコーンゴム材料は、シリコ
ーンゴムをベースにして、これにカーボンブラック、顔
料、染料、炭酸カルシウム、タルク、金属粉末、短繊維
粉末などの充填剤の１種または２種以上を配合してな
る、光線透過率が40％以下、好ましくは20％以下であ
る、液状にすることの可能な遮光性を有する組成物であ
ればよい。一方、透明シリコーンゴム材料は、光線透過
率が80％以上のシリコーンゴムを、トルエン、THF、酢
酸ビニル、セロソルブなどの溶剤を用いて、固形分とし
て５〜60重量％の濃度のスプレー液に調製したものでよ
い。
（発明の効果）
本発明の方法によれば、積層するときの遮光層と透明
層のピッチミスを大幅に減少させ歩留まりの向上に寄与
するほか、遮光層および透明層の厚さのいずれか一方が
極薄であるにも拘らず、任意に選択することができ、高
精度のピッチムラのない防眩シート部品が得られる。さ
らに、この防眩シート部品は、柔軟性、復元性、耐熱性
などに富むので、湾曲部への適用や高温下での使用が可
能となり、より広い範囲で用いることができる。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a rubber elastic anti-glare sheet component, in particular, to block unnecessary external light, improve the contrast of an internal display portion, and adjust a visible angle range. The present invention relates to a method for manufacturing a thin, high-precision rubber elastic anti-glare sheet component having functions such as anti-glare and identification. (Prior art and its problems) Conventional production methods include a single-layer colored or opaque (hereinafter simply referred to as "light-shielding") sheet or film (hereinafter referred to as "film") produced using a press or roll. ) And a monochromatic transparent (hereinafter simply referred to as “transparent”) film produced in the same manner are alternately multiplexed and superimposed, joined and integrated, sliced in the laminating direction, and provided with a light-shielding layer on the surface. A method of obtaining a striped sheet having a striped pattern in which transparent layers are alternately multiplexed (Japanese Patent Laid-Open No. 51-4418)
However, in this method, a pitch error easily occurs during lamination, which not only reduces the commercial value but also causes a defective rate. In addition, a film having a thickness of 1 to 10 μm, particularly a light-shielding film, is liable to be broken or a pinhole due to the fact that a large amount of carbon black, a filler, and a coloring agent are usually mixed with plastic, and the production of a film-like material is particularly difficult. It was difficult. Furthermore, a number of transparent films made of a thermoplastic resin such as a vinyl chloride resin, an acrylic resin, or a cellulose derivative are laminated and pressed and integrated via a colored adhesive in which a coloring agent is uniformly blended to form a block. Plane cutting on a surface having a right angle or a predetermined angle with respect to a striped sheet in which transparent parts and colored light-shielding parts are alternately arranged in parallel and alternately. There is also known a method of manufacturing a fine sloping light-shielding plate in which a film, a sheet or a plate is laminated and integrated (Japanese Patent Application Laid-Open No. 50-77653). Because it is made of plastic, it is rigid and flexible, and has poor resilience to deformation such as bending and poor heat resistance (for example, heat in a closed car left in direct sunlight in midsummer) Because of the deformation and the volatilization of the plasticizer compounded in the plastic to generate an odor, there is a limitation in application to a curved portion and use at a high temperature. (Means for Solving the Problems) In the present invention, the thickness of the light-shielding film and the transparent film can be arbitrarily selected within the range of 1 to 10 μm, and the film is rich in flexibility (rubber elasticity) and heat resistance. It is intended to provide a method for manufacturing a rubber elastic anti-glare sheet part which can be processed into an arbitrary curved surface and has a high precision, a very small pitch and no unevenness. One of a light-shielding silicone rubber material and a transparent silicone rubber material The material is made into a thin layer piece, and the other silicone rubber material is sprayed on the surface in a layer form to form a thin layer having a thickness of 1 to 10 μm after drying, and a thin layer piece of one silicone rubber material is stacked thereon, and further, The procedure of spraying the other silicone rubber material in layers on the surface to form a thin layer is repeated to obtain a predetermined thickness, and then laminated under pressure or heat and pressure to form an alternating multiple layers Lock and slice this on a plane that forms a predetermined angle with respect to the lamination surface, to produce a sheet having a stripe pattern in which a colored or opaque layer and a transparent layer are alternately multiplexed on the surface. It is a feature. Example Next, details of the present invention will be described based on the example shown in FIG. 100 parts by weight of silicone rubber KE-1571u (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) with good transparency and vulcanizing agent C-2 (same as above) 2
Of silicone rubber X-32- on a surface of a 100 μm thick vulcanized transparent silicone rubber film as a thin piece 1 of a transparent silicone rubber material formed into a film by mixing with a silicone rubber X-32-
A coating liquid consisting of 100 parts by weight of 389 A and B (each same as above) in a ratio of 1: 1 respectively, 3 parts by weight of carbon black, 3 parts by weight of iron oxide, and 40 parts by weight of toluene was layered with a spray gun. To form a black film having a thickness of 3 μm as a thin layer 2 of a light-shielding silicone rubber material, and then stacking the same transparent silicone rubber film thereon, and further spraying the same in a layered manner thereon. The operation of producing a black film by multiplexing was repeated multiple times (FIGS. A and b).
), And thin layers 1 made of a transparent silicone rubber material and thin layers 2 made of a light-shielding silicone rubber material were alternately multiplexed to a thickness of 100 mm. After subjecting this laminate to a pressure treatment of 5 kg / cm 2 for 24 hours, 1
The resultant was integrated by a heat treatment at 30 ° C. for 1 hour to produce a striped multilayer block 3. Next, this is sliced at a thickness of 0.5 cm and 50 μm in parallel planes forming a predetermined angle with respect to the lamination surface, and a thin layer of a light-shielding silicone rubber material and a thin layer of a transparent silicone rubber material are respectively formed on the surfaces. Striped sheets 4 as two types of rubber elastic anti-glare sheets each having a striped pattern in which pieces were alternately multiplexed were produced (see FIG. C). The obtained striped sheet 4 has a thickness of 100 μm in the laminating direction of the transparent silicone rubber material layer 5 and a thickness of 3 μm of the light-shielding silicone rubber material layer 6.
And 50μm two types of 100mm square, and none of them have tears such as pinholes even though the black film is extremely thin,
In addition, there was almost no pitch error, the yield was improved several times as compared with the conventional method, and it was suitable as an antiglare sheet component. Further, a light-shielding film constituting the anti-glare sheet component,
Since the transparent film is also made of silicone rubber, it has excellent heat resistance, and even if left at high temperatures (80 to 150 ° C), the plastic layer may be deformed by heat or low volatile components may evaporate to cloud the transparent layer. It does not generate odor, but it can be applied to applications requiring heat resistance, such as in-vehicle use; it can be freely bent and simply pressed against various curved surfaces (for example, CRT). It can be brought into close contact only by touching it, so that there is great freedom in designing anti-glare properties; when the bending stress is released after bending, the sheet can be easily returned to the original sheet, and it can be freely adjusted in the field. In addition to stacking either one by spraying, there is no pinholes or tears in each layer despite the thickness of 1 to 10 μm, so there is no glare unevenness; good gas permeability, It had a benefit, such as; without air bubbles caused by the solvent at the interface occurs, uneven brightness, no antiglare sheet uneven pitch (parallelism) is obtained. The present invention is not limited to the above examples, for example, the light-shielding silicone rubber material used for this is based on silicone rubber, and carbon black, pigment, dye, calcium carbonate, talc, metal powder, A composition having a light transmittance of 40% or less, preferably 20% or less, and having a light-shielding property capable of being made into a liquid, which comprises one or more fillers such as short fiber powder. I just need. On the other hand, a transparent silicone rubber material is prepared by spraying a silicone rubber with a light transmittance of 80% or more into a spray liquid with a solid content of 5 to 60% by weight using a solvent such as toluene, THF, vinyl acetate, and cellosolve. What you did. (Effects of the Invention) According to the method of the present invention, pitch mistakes between the light-shielding layer and the transparent layer at the time of lamination are significantly reduced, which contributes to an improvement in yield. In addition, one of the thicknesses of the light-shielding layer and the transparent layer is reduced. Although it is extremely thin, it can be arbitrarily selected, and a highly accurate antiglare sheet component without pitch unevenness can be obtained. Further, since the antiglare sheet component is rich in flexibility, resilience, heat resistance and the like, it can be applied to a curved portion or used at a high temperature, and can be used in a wider range.
【図面の簡単な説明】
第１図は本発明の実施例における工程の説明図で、図
（ａ）は積み重ねの過程、図（ｂ）は多層ブロック体の
形成過程、図（ｃ）は縞模様シートの形成時の状態を示
す。
（主要な符号の説明）
１、５……透明シリコーンゴム材料からなる薄層片、
２、６……遮光シリコーンゴム材料からなる薄層、３…
…多層ブロック、４……縞模様シート。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a process in an embodiment of the present invention. FIG. 1 (a) shows a stacking process, FIG. 1 (b) shows a process of forming a multilayer block, and FIG. The state at the time of forming a pattern sheet is shown. (Explanation of main symbols) 1, 5 .... Thin layer piece made of transparent silicone rubber material,
2, 6 ... Thin layer made of light-shielding silicone rubber material, 3 ...
... multilayer block, 4 ... striped sheet.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G02B 5/00 G03B 21/56 - 21/60 B32B 1/00 - 35/00──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 6 , DB name) G02B 5/00 G03B 21/56-21/60 B32B 1/00-35/00
Claims (1)
リコーンゴム材料とのいずれか一方のシリコーンゴム材
料を薄層片とし、その表面に他方のシリコーンゴム材料
をスプレーして乾燥後の厚さで１〜10μｍの薄層とし、
これに一方のシリコーンゴム材料の薄層片を積み重ね、
さらにその表面に他方のシリコーンゴム材料をスプレー
して薄層にするという操作を反復して所定の厚さにした
後、加圧または加熱加圧下に積層一体化して交互多重の
多層ブロックとし、これを積層面に対して所定の角度を
なす面でスライスして、その表面が着色または不透明層
と透明層とが交互多重に積層されてなる縞模様を有する
シートを作製することを特徴とするゴム弾性防眩シート
部品の製造方法。(57) [Claims] Either a colored or opaque silicone rubber material or a transparent silicone rubber material is formed into a thin layer piece, and the other silicone rubber material is sprayed on the surface of the thin piece, and the thickness after drying is 1 to 10 μm. Thin layer,
Stack a thin layer of silicone rubber material on top of this,
Further, the operation of spraying the other silicone rubber material on the surface to form a thin layer is repeated to obtain a predetermined thickness, and then laminated or integrated under pressure or heat and pressure to form an alternate multi-layered block. Is sliced on a surface forming a predetermined angle with respect to the lamination surface, and a rubber sheet characterized by producing a sheet having a striped pattern whose surface is colored or opaque and transparent layers are alternately multiplexed. A method for producing an elastic anti-glare sheet component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62306532A JP2756249B2 (en) | 1987-12-03 | 1987-12-03 | Method of manufacturing rubber elastic anti-glare sheet part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62306532A JP2756249B2 (en) | 1987-12-03 | 1987-12-03 | Method of manufacturing rubber elastic anti-glare sheet part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01147404A JPH01147404A (en) | 1989-06-09 |
| JP2756249B2 true JP2756249B2 (en) | 1998-05-25 |
Family
ID=17958162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62306532A Expired - Fee Related JP2756249B2 (en) | 1987-12-03 | 1987-12-03 | Method of manufacturing rubber elastic anti-glare sheet part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2756249B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0854506A (en) * | 1995-07-21 | 1996-02-27 | Shinano Polymer Kk | Antidazzle filter |
| EP1390196A4 (en) * | 2001-04-26 | 2005-12-28 | Cross Match Technologies Inc | Silicone rubber surfaces for biometric print tir prisms |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5538275B2 (en) * | 1973-07-10 | 1980-10-03 | ||
| JPS60162201A (en) * | 1984-02-01 | 1985-08-24 | Mita Ind Co Ltd | Reflection plate |
-
1987
- 1987-12-03 JP JP62306532A patent/JP2756249B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01147404A (en) | 1989-06-09 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |