JPH0586898B2 - - Google Patents
Info
- Publication number
- JPH0586898B2 JPH0586898B2 JP4819389A JP4819389A JPH0586898B2 JP H0586898 B2 JPH0586898 B2 JP H0586898B2 JP 4819389 A JP4819389 A JP 4819389A JP 4819389 A JP4819389 A JP 4819389A JP H0586898 B2 JPH0586898 B2 JP H0586898B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- window
- cavity
- window body
- synthetic resin
- 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
- 239000000463 material Substances 0.000 claims description 22
- 229920003002 synthetic resin Polymers 0.000 claims description 19
- 239000000057 synthetic resin Substances 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 238000001746 injection moulding Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 208000015943 Coeliac disease Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3052—Windscreens
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は車両用等に使用される合成樹脂製ウ
インドウの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing synthetic resin windows used for vehicles and the like.
合成樹脂製のウインドウの製造方法として、透
明合成樹脂によりウインドウ本体と枠部を一体に
射出成形する方法がある（例えば実公昭61−
32808号）。しかしながら、このような方法でウイ
ンドウを製造する場合、剛性をもたせるために枠
部の肉厚を厚くしたり、リブを形成すると、外表
面側にヒケ等の変形が生じやすい。また枠部に別
途塗装等により不透明被膜を形成する必要があ
り、工程が繁雑である。
As a manufacturing method for synthetic resin windows, there is a method in which the window body and frame are integrally injection molded using transparent synthetic resin (for example,
No. 32808). However, when manufacturing a window using such a method, if the thickness of the frame portion is increased or ribs are formed in order to provide rigidity, deformation such as sink marks is likely to occur on the outer surface side. Further, it is necessary to form an opaque film on the frame by painting or the like separately, which makes the process complicated.
一方、モールデイングの製造方法として、異な
るキヤビテイ型を用いて、多重射出成形を行う方
法が知られている（例えば特開昭56−144131号）。
このような方法をウインドウの製造に適用して、
第１キヤビテイ型を用いてウインドウ本体を成形
した後、その上に第２キヤビテイ型により枠材を
形成しても、異質の樹脂を用いる場合枠材がウイ
ンドウ本体から剥離しやすい。 On the other hand, as a method for producing moldings, a method is known in which multiple injection molding is performed using different cavity molds (for example, JP-A-56-144131).
Applying this method to window manufacturing,
Even if a window body is molded using a first cavity mold and a frame material is formed thereon using a second cavity mold, the frame material is likely to peel off from the window body if a different type of resin is used.
本発明の目的は、上記のような従来の問題点を
解決するため、枠材がウインドウ本体に機械的に
係合して脱落しにくい合成樹脂製ウインドウを、
多重射出成形により簡単な工程で効率よく製造で
きる合成樹脂製ウインドウの製造方法を提案する
ことである。
An object of the present invention is to provide a synthetic resin window in which the frame material mechanically engages with the window body and is difficult to fall off, in order to solve the conventional problems as described above.
The purpose of this invention is to propose a method for manufacturing synthetic resin windows that can be manufactured efficiently in a simple process using multiple injection molding.
本発明は次の合成樹脂製ウインドウの製造方法
である。
The present invention is the following method for manufacturing a synthetic resin window.
(1) コア型と第１キヤビテイ型により形成される
キヤビテイに透明な合成樹脂を射出してウイン
ドウ本体を成形する工程と、成形されたウイン
ドウ本体の少なくとも枠材形成部分をコア型か
ら離間した状態で、第２キヤビテイ型との間に
形成されるキヤビテイに別の合成樹脂を射出し
て、前記ウインドウ本体の周縁部を表裏両側か
ら挟むように枠材を一体に成形する工程とを含
む合成樹脂製ウインドウの製造方法。(1) A step of molding a window body by injecting a transparent synthetic resin into a cavity formed by a core mold and a first cavity mold, and a state in which at least the frame forming part of the molded window body is separated from the core mold. and a step of injecting another synthetic resin into the cavity formed between the second cavity mold and integrally molding the frame material so as to sandwich the peripheral edge of the window main body from both front and back sides. A method of manufacturing a manufactured window.
(2) 表面に硬質皮膜を有する透明なインサートフ
イルムを型内に配置して、ウインドウ本体の成
形時に一体化するようにした上記(1)記載の合成
樹脂製ウインドウの製造方法。(2) The method for manufacturing a synthetic resin window according to (1) above, wherein a transparent insert film having a hard film on the surface is placed in a mold so that it is integrated during molding of the window body.
本発明において透明とは半透明を含む。 In the present invention, transparent includes translucent.
本発明の合成樹脂製ウインドウの製造方法にお
いては、まずコア型と第１キヤビテイ型により形
成されるキヤビテイに、透明な合成樹脂を射出し
てウインドウ本体を成形した後、成形されたウイ
ンドウ本体の少なくとも枠材形成部分をコア型か
ら離間した状態で、第２キヤビテイ型との間に形
成されるキヤビテイに別の合成樹脂を射出して、
前記ウインドウ本体の周縁部を表裏両側から挟む
ように、枠材を一体に成形する。
In the method of manufacturing a synthetic resin window of the present invention, first, a transparent synthetic resin is injected into a cavity formed by a core mold and a first cavity mold to mold a window body, and then at least one of the molded window bodies With the frame material forming part separated from the core mold, another synthetic resin is injected into the cavity formed between it and the second cavity mold,
Frame members are integrally molded so as to sandwich the peripheral edge of the window main body from both the front and back sides.
ウインドウ本体に硬質皮膜を形成する場合は、
表面に硬質皮膜を有する透明なインサートフイル
ムを型内に配置して、ウインドウ本体の成形時に
一体化することができ、その後前記の通り枠材を
形成することにより、硬質皮膜の上から枠材を機
械的に係合させることができる。 When forming a hard film on the window body,
A transparent insert film with a hard coating on the surface can be placed in the mold and integrated during molding of the window body, and then by forming the frame material as described above, the frame material is applied over the hard coating. It can be mechanically engaged.
こうして製造される合成樹脂製ウインドウは、
枠材がウインドウ本体（および硬質皮膜）と機械
的に係合しているため、脱落は起こりにくい。 The synthetic resin window manufactured in this way is
Since the frame material is mechanically engaged with the window body (and hard coating), falling off is less likely to occur.
以下、本発明を図面の実施例により説明する。
第１図は射出成形装置の平面図、第２図はその正
面図、第３図は第１図のＡ−Ａ断面図、第４図は
Ｂ−Ｂ断面図、第５図図はインサートフイルムの
断面図である。
Hereinafter, the present invention will be explained with reference to embodiments of the drawings.
Figure 1 is a plan view of the injection molding apparatus, Figure 2 is its front view, Figure 3 is a sectional view taken along line AA in Figure 1, Figure 4 is a sectional view taken along line B-B, and Figure 5 is an insert film. FIG.
射出成形装置１は、回転軸２を中心として180゜
ずつ往復回転するモールドプレート３の両側に同
一形状のコア型４，５を有し、これに対向して可
動の第１および第２キヤビテイ型６，７、ならび
に射出ノズル８，９を備えている。第１キヤビテ
イ型６と対向するコア型を第１コア型４とし、第
１コア型４および第１キヤビテイ型６間にはウイ
ンドウ本体１０を成形するキヤビテイ１１が形成
され、このキヤビテイ１１によつて成形されたウ
インドウ本体１０を保持したまま、成形後180゜回
転して第２キヤビテイ型７と対向して第２コア型
５となる。この第２コア型５および第２キヤビテ
イ型７間には枠材１２を成形するキヤビテイ１３
が形成されている。第１および第２コア型４，５
にはスライド可能な位置決め兼イジエクトピン１
４，１５がキヤビテイ１３に突出し、型面にはウ
インドウ本体１０がスライド可能な段差部１６，
１７が形成されている。第１キヤビテイ型６には
インサートフイルム１８を位置決めする位置決め
ピン１９がキヤビテイ１１に突出している。第２
キヤビテイ型７は型本体７ａとスライドド型７ｂ
とからなる。キヤビテイ１３の外表面側の内側１
３ａは段差部１７より内側になるようにする。２
１，２２はランナ、２３，２４はスプルー、２
５，２６はゲートである。 The injection molding apparatus 1 has core molds 4 and 5 of the same shape on both sides of a mold plate 3 that reciprocates by 180 degrees around a rotation axis 2, and first and second cavity molds that are movable opposite to the core molds 4 and 5. 6, 7, and injection nozzles 8, 9. A core mold facing the first cavity mold 6 is a first core mold 4, and a cavity 11 for molding the window body 10 is formed between the first core mold 4 and the first cavity mold 6. While holding the molded window body 10, after molding, it is rotated by 180 degrees to face the second cavity mold 7 to form the second core mold 5. A cavity 13 for molding the frame material 12 is provided between the second core mold 5 and the second cavity mold 7.
is formed. 1st and 2nd core type 4, 5
There is a slideable positioning and eject pin 1.
4 and 15 protrude into the cavity 13, and the mold surface has a stepped portion 16 on which the window body 10 can slide.
17 is formed. In the first cavity mold 6, a positioning pin 19 for positioning the insert film 18 projects into the cavity 11. Second
The cavity mold 7 has a mold main body 7a and a sliding mold 7b.
It consists of Inside side 1 on the outer surface side of cavity 13
3a is located inside the stepped portion 17. 2
1 and 22 are runners, 23 and 24 are sprues, 2
5 and 26 are gates.
ウインドウ２０の製造方法は、まず第１キヤビ
テイ型６の位置決めピン１９にインサートフイル
ム１８を取付けて位置決めする。インサートフイ
ルムはウインドウ本体１０を形成する樹脂２７と
相溶性を有する樹脂からなる基材１８ａの表面に
硬質皮膜１８ｂを積層一体化したフイルムであ
り、取付け孔１８ｃに位置決めピン１９を挿入し
て位置決めする。硬質皮膜１８ｂとしてはPVD、
CVD法により形成したSiOx皮膜、シロキサン系
またはUV硬化系ハードコート、あるいはこれら
を積層したものなどがある。 In the method of manufacturing the window 20, first, the insert film 18 is attached to the positioning pin 19 of the first cavity mold 6 and positioned. The insert film is a film in which a hard film 18b is laminated and integrated on the surface of a base material 18a made of a resin that is compatible with the resin 27 forming the window body 10, and is positioned by inserting a positioning pin 19 into the mounting hole 18c. . As the hard coating 18b, PVD,
Examples include SiOx films formed by CVD, siloxane-based or UV-curable hard coats, and laminates of these.
インサートフイルム１８を付けた後に型締め
し、ゲート２５を通して樹脂２７を射出してイン
サートフイルム１８と一体化し、ウインドウ本体
１０を成形する。樹脂２７としてはポリカーボネ
ート樹脂、ポリメチルメタクリレート樹脂などの
透明な合成樹脂を用いる。 After attaching the insert film 18, the mold is clamped, and the resin 27 is injected through the gate 25 to be integrated with the insert film 18 to form the window body 10. As the resin 27, a transparent synthetic resin such as polycarbonate resin or polymethyl methacrylate resin is used.
ウインドウ本体１０を成形後、型開きして、モ
ールドプレート３を180゜回転させ、ウインドウ本
体１０を取付けた状態で第１コア型４を第２キヤ
ビテイ型７と対向する位置にもつてきて、横断面
コ字状の枠材１２の成形を行う。この時第２コア
型５は第１キヤビテイ型６と対向する位置に移動
するので、枠材１２の形成されたウインドウ２０
を第２コア型５から取外した後、前記と同様に第
１キヤビテイ型６を型閉めしてウインドウ本体１
０の成形を行う。 After molding the window body 10, open the mold, rotate the mold plate 3 by 180 degrees, bring the first core mold 4 with the window body 10 attached to a position facing the second cavity mold 7, and cross the mold. The frame material 12 having a U-shaped surface is formed. At this time, the second core mold 5 moves to a position facing the first cavity mold 6, so that the window 20 on which the frame material 12 is formed
is removed from the second core mold 5, the first cavity mold 6 is closed in the same manner as described above, and the window body 1 is removed.
Perform 0 molding.
枠材１２の成形は、まず位置決め兼イジエクト
ピン１５を突出させて、第２コア型５とウインド
ウ本体１０を離間させ、両者間に間隙２８を形成
する。このときウインドウ本体１０は段差部１７
に沿つてスライドし、なお段差部１７は間隙２８
の中央部２８ａと周縁部２８ｂを遮断するように
する。この状態で型締めしてキヤビテイ１３に別
の樹脂２９を射出して枠材１２を成形し、ウイン
ドウ２０を完成する。このとき樹脂２９は間隙２
８の周縁部２８ｂ、およびピン１９により形成さ
れた穴３０にも入り込む。樹脂２９としては、軟
質ポリ塩化ビニル樹脂、EVA樹脂などが射出成
形用として使用できるが、ポリウレタン樹脂等に
よるRIM成形を行つてもよい。この後イジエク
トピン１１５を突出させて第２コア型５からウイ
ンドウ２０を取外す。 In forming the frame material 12, first, the positioning/eject pin 15 is projected to separate the second core mold 5 and the window body 10, thereby forming a gap 28 therebetween. At this time, the window body 10 is
, and the stepped portion 17 is in the gap 28.
The center portion 28a and the peripheral portion 28b are cut off. In this state, the mold is clamped and another resin 29 is injected into the cavity 13 to form the frame material 12 and the window 20 is completed. At this time, the resin 29 is
It also enters the hole 30 formed by the peripheral edge 28b of 8 and the pin 19. As the resin 29, soft polyvinyl chloride resin, EVA resin, or the like can be used for injection molding, but RIM molding with polyurethane resin or the like may also be performed. Thereafter, the eject pin 115 is projected to remove the window 20 from the second core mold 5.
こうして製造されたウインドウ２０は枠材１２
がウインドウ本体１０の周縁部を表裏両面から挟
んで機械的に係合しているため脱落のおそれはな
い。また硬質皮膜１８ｂも周縁部が枠材１２によ
り挟まれているため剥離のおそれはない。 The window 20 manufactured in this way has a frame material 12
Since they are mechanically engaged by sandwiching the peripheral edge of the window body 10 from both the front and back sides, there is no risk of them falling off. Furthermore, since the peripheral edge portion of the hard coating 18b is sandwiched between the frame members 12, there is no fear of peeling.
またコア型４，５はモールドプレート３に第
１、第２キヤビテイ型６，７とそれぞれ対向して
配置されているので、第１コア型４と第１キヤビ
テイ型６とでウインドウ本体１０を成形している
間に同時に第２コア型５と第２キヤビテイ型７と
で枠材１２を成形するようにすれば成形効率が良
い。 Further, since the core molds 4 and 5 are arranged on the mold plate 3 to face the first and second cavity molds 6 and 7, respectively, the window body 10 is formed by the first core mold 4 and the first cavity mold 6. If the frame material 12 is simultaneously molded using the second core mold 5 and the second cavity mold 7 during the molding process, molding efficiency is improved.
上記実施例において、コア型は２個以上の場合
が好ましいが、１個でもよい。また硬質皮膜１８
ｂはウインドウ本体１０の片面に形成したが、両
面に形成する場合はインサートフイルム１８を両
側に配置する。空間部３１を設けると硬質皮膜１
８ｂの傷付を防止できるが、必ずしもなくてもよ
い。 In the above embodiment, the number of core molds is preferably two or more, but it may be one. In addition, hard coating 18
b is formed on one side of the window body 10, but when forming on both sides, insert films 18 are placed on both sides. When the space 31 is provided, the hard coating 1
8b can be prevented from being damaged, but it is not necessary.
また枠材１２の成形時に第１、第２コア型４，
５上のイジエクトピン１４，１５を突出させるこ
とにより、第１、第２コア型４，５とウインドウ
本体１０の間に間隙２８を形成させるようにした
が、間隙２８は周縁部２８ｂのみが形成されれば
良いので、イジエクトピン１４，１５は固定し、
第１、第２のコア型４，５のウインドウ本体１０
の枠材１２を形成する部分をコア型本体とは別体
で成形しておいて、この枠材１２の相当部分のみ
を後退させて間隙２８の周縁部２８ｂを形成する
ようにしても良い。 Also, when molding the frame material 12, the first and second core molds 4,
By protruding the eject pins 14 and 15 on the window body 10, a gap 28 is formed between the first and second core molds 4 and 5 and the window body 10, but the gap 28 is formed only at the peripheral edge 28b. Fix the eject pins 14 and 15, and
Window body 10 of first and second core types 4 and 5
The portion forming the frame member 12 may be molded separately from the core mold body, and only a corresponding portion of the frame member 12 may be moved back to form the peripheral edge portion 28b of the gap 28.
以上の通り本発明によれば、ウインドウ本体を
コア型から離間した状態で枠材を成形するため、
枠材がウインドウ本体に機械的に係合して脱落し
にくい合成樹脂製ウインドウを、多重射出成形に
より簡単な工程で効率よく製造することができ
る。
As described above, according to the present invention, since the frame material is molded with the window body separated from the core mold,
A synthetic resin window whose frame material mechanically engages with the window body and is difficult to fall off can be efficiently manufactured in a simple process by multiple injection molding.
第１図は射出成形装置の平面図、第２図はその
正面図、第３図は第１図のＡ−Ａ断面図、第４図
はＢ−Ｂ断面図、第５図はインサートフイルムの
断面図である。
各図中、同一符号は同一または相当部分を示
し、１は射出成形装置、４，５はコア型、６，７
はキヤビテイ型、１０はウインドウ本体、１１，
１３はキヤビテイ、１２は枠材、１４，１５は位
置決め兼イジエクトピン、１６，１７は段差部、
１８はインサートフイルム、２０はウインドウで
ある。
Figure 1 is a plan view of the injection molding apparatus, Figure 2 is its front view, Figure 3 is a sectional view taken along line A-A in Figure 1, Figure 4 is a cross-sectional view taken along line B-B, and Figure 5 is a cross-sectional view of the insert film. FIG. In each figure, the same reference numerals indicate the same or corresponding parts, 1 is an injection molding device, 4 and 5 are core molds, 6 and 7
is the cavity type, 10 is the window body, 11,
13 is a cavity, 12 is a frame material, 14 and 15 are positioning and eject pins, 16 and 17 are step portions,
18 is an insert film, and 20 is a window.
Claims (1)
キヤビテイに透明な合成樹脂を射出してウインド
ウ本体を成形する工程と、成形されたウインドウ
本体の少なくとも枠材形成部分をコア型から離間
した状態で、第２キヤビテイ型との間に形成され
るキヤビテイに別の合成樹脂を射出して、前記ウ
インドウ本体の周縁部を表裏両側から挟むように
枠材を一体に成形する工程とを含む合成樹脂製ウ
インドウの製造方法。 ２ 表面に硬質皮膜を有する透明なインサートフ
イルムを型内に配置して、ウインドウ本体の成形
時に一体化するようにした請求項１記載の合成樹
脂製ウインドウの製造方法。[Claims] 1. A step of molding a window body by injecting a transparent synthetic resin into a cavity formed by a core mold and a first cavity mold, and a step of molding at least a frame material forming portion of the molded window body into a core mold. a step of injecting another synthetic resin into the cavity formed between the window body and the second cavity mold to integrally mold the frame material so as to sandwich the peripheral edge of the window body from both the front and back sides; A method for manufacturing a synthetic resin window including. 2. The method of manufacturing a synthetic resin window according to claim 1, wherein a transparent insert film having a hard coating on its surface is placed in a mold so as to be integrated during molding of the window body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4819389A JPH02227224A (en) | 1989-02-28 | 1989-02-28 | Manufacture of synthetic resin window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4819389A JPH02227224A (en) | 1989-02-28 | 1989-02-28 | Manufacture of synthetic resin window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02227224A JPH02227224A (en) | 1990-09-10 |
| JPH0586898B2 true JPH0586898B2 (en) | 1993-12-14 |
Family
ID=12796550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4819389A Granted JPH02227224A (en) | 1989-02-28 | 1989-02-28 | Manufacture of synthetic resin window |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02227224A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996012604A1 (en) * | 1994-10-20 | 1996-05-02 | Komatsu Ltd. | Compound plate and method of manufacturing the same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000299725A (en) * | 1999-04-13 | 2000-10-24 | Matsushita Electric Ind Co Ltd | Portable telephone |
| DE10047624A1 (en) * | 2000-09-26 | 2002-04-25 | Dura Automotive Body & Glass | Use of an additive consisting of an emulsifier and one or more inhibitors in a bath for removing layers of nickel, tin, lead or tin-lead from surfaces made of copper or copper alloys |
| US8173244B2 (en) | 2004-01-14 | 2012-05-08 | Franz Josef Summerer | Transparent sheet-like shaped plastic part with concealed sprue mark, and process for producing it |
| JP6540611B2 (en) | 2016-06-15 | 2019-07-10 | 株式会社豊田自動織機 | Resin window manufacturing method and resin window |
-
1989
- 1989-02-28 JP JP4819389A patent/JPH02227224A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996012604A1 (en) * | 1994-10-20 | 1996-05-02 | Komatsu Ltd. | Compound plate and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02227224A (en) | 1990-09-10 |
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