JPH02123607A - Mounting method of incandescent lamp with concave reflecting mirror - Google Patents
Mounting method of incandescent lamp with concave reflecting mirrorInfo
- Publication number
- JPH02123607A JPH02123607A JP63275936A JP27593688A JPH02123607A JP H02123607 A JPH02123607 A JP H02123607A JP 63275936 A JP63275936 A JP 63275936A JP 27593688 A JP27593688 A JP 27593688A JP H02123607 A JPH02123607 A JP H02123607A
- Authority
- JP
- Japan
- Prior art keywords
- light bulb
- mounting hole
- adhesive
- incandescent light
- opening
- 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
Landscapes
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はハロゲン電球を凹面反射鏡に奇麗に取り付ける
ための新規な取付方法とその構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a novel mounting method and structure for neatly mounting a halogen light bulb onto a concave reflector.
（従来の技術とその問題点）
従来、白熱電球（Ａ″）を凹面反射鏡（１′）に取着す
る場合、凹面反射鏡（ｌｏ）に穿設されたランプ取付孔
（２°）に白熱電球（＾゛）の取付部（５′）を挿入し
、ＬＣＬを合わせた後、取付部（５′）とランプ取付孔
（２′）との間隙に接着剤（６′）を充填して両者を固
定していた。ところがこの場合、ランプ取付孔（２′）
の外面側開口（３′）から内周反射面側開口（４″）ま
でにおいてその間隙の幅がほぼ同一であったため、充填
量が多かったり充填ムラがあったりすると接着剤（６°
）が内周反射面側開口（４°）全体又は一部において溢
出して外観を損ったりする事があった。(Prior art and its problems) Conventionally, when attaching an incandescent light bulb (A'') to a concave reflector (1'), the lamp mounting hole (2°) drilled in the concave reflector (lo) was After inserting the mounting part (5') of the incandescent light bulb (^゛) and aligning the LCL, fill the gap between the mounting part (5') and the lamp mounting hole (2') with adhesive (6'). However, in this case, the lamp mounting hole (2')
The width of the gap from the outer opening (3') to the inner reflective surface opening (4'') was almost the same, so if there is a large amount of filling or uneven filling, the adhesive (6°
) may overflow from the entire or part of the opening (4°) on the inner reflective surface side, spoiling the appearance.
（発明の目的）
本発明はかかる従来例の欠点に鑑みてなされたもので、
その目的とするところは、普通に充填しても内周反射面
側にも溢出する事がない凹面反射鏡付き白熱電球の取付
方法を提供するにある。(Object of the invention) The present invention was made in view of the drawbacks of the conventional example, and
The purpose is to provide a method for mounting an incandescent light bulb with a concave reflector that does not overflow to the inner reflective surface side even when filled normally.
（問題点を解決するための手段）
上記の目的を達成するために、第１項は；■凹面反射鏡
（１）の底部にランプ取付孔（２）を穿設し、
■ランプ取付孔（２）の内周反射面側開口（４）近傍部
分又はランプ取付孔（２）の内周反射面側開口（４）近
傍部分に対応する白熱電球（＾）の取付部（５）の基部
外周のいずれか一方乃至両方に接着剤層（６ａ）を形成
し、
■続いてランプ取付孔（２）に白熱電球（＾）の取付部
（５）を挿入した後、接着剤層（６ａ）を加熱硬化させ
てランプ取付孔（２）と白熱電球（＾）の取付部（５）
との間隙の内周反射面側開口（４）近傍部分を閉塞１１
、■然る後、前記間隙の外面１１１１Ｍ口（３）から接
着剤（６）を充填し、硬化させて両者を固着する。(Means for Solving the Problem) In order to achieve the above objective, the first item is: ■ A lamp mounting hole (2) is bored at the bottom of the concave reflector (1), ■ A lamp mounting hole ( The outer periphery of the base of the mounting part (5) of the incandescent light bulb (^) corresponding to the part near the inner reflective surface side opening (4) of 2) or the part near the inner reflective surface side opening (4) of the lamp mounting hole (2) Form an adhesive layer (6a) on either one or both of them, ■Next, insert the mounting part (5) of the incandescent light bulb (^) into the lamp mounting hole (2), and then apply the adhesive layer (6a). Heat and harden the lamp mounting hole (2) and the incandescent light bulb (^) mounting part (5).
Close the part near the opening (4) on the inner peripheral reflective surface side of the gap 11
, (2) After that, adhesive (6) is filled from the outer surface 1111M opening (3) of the gap, and is cured to fix both.
と言う技術的手段を採用しており、第２項では；■凹面
反射鏡（１）の底部にランプ取付孔（２）を穿設し、
■ランプ取付孔（２）に白熱電球（＾）の取付部（５）
を配置し、
■ランプ取付孔（２）と白熱電球（＾）の取付部（５）
との間隙の内周反射面側開口（４）近傍部分に接着剤（
６ａ）を充填した後加熱硬化させて内周反射面側開口（
４）近傍部分をｒ！４塞し、
■続いて前記間隙の外面側開口（３）から接着剤（６ａ
）を充填し、硬化させて両者を固着する。In the second section, we adopt the following technical measures: ■ Drill a lamp mounting hole (2) at the bottom of the concave reflector (1), and ■ Insert an incandescent light bulb (^) into the lamp mounting hole (2). Mounting part (5)
■Lamp mounting hole (2) and incandescent light bulb (^) mounting part (5)
Apply adhesive (
After filling 6a), heat and harden it to form an opening on the inner reflective surface side (
4) The neighboring part is r! 4, and then apply adhesive (6a) from the opening (3) on the outer surface of the gap.
) and harden to fix both.
と言う技術的手段を採用しており、第３項では；■請求
項１又は２の取付方法において、ランプ取付孔（２）と
白熱電球（＾）の取付部（５）との間隙の内周反射面側
開口（４）近傍部分に充填する接着剤（６ａ）を高粘度
接着剤とする。In the third paragraph: ■ In the mounting method of claim 1 or 2, the inside of the gap between the lamp mounting hole (2) and the mounting part (5) of the incandescent light bulb (^) is The adhesive (6a) filled in the vicinity of the peripheral reflective surface side opening (4) is a high-viscosity adhesive.
という技術的手段を採用している。This technical method is adopted.
（作 用）
■まず、ランプ取付孔（２）と白熱電球（＾）の取付部
（５）との間隙の内周反射面側聞口（４）近傍部分に充
填した接着剤（６ａ）を加熱すると発泡膨張し、内周反
射面側開口（４）近傍部分における間隙を閉塞する事に
なる。(Function) ■First, apply the adhesive (6a) filled in the area near the inner reflective surface side opening (4) in the gap between the lamp mounting hole (2) and the mounting part (5) of the incandescent light bulb (^). When heated, the foam expands and closes the gap in the vicinity of the inner reflective surface side opening (4).
■この状態で前記間隙の外面側開口（３）から接着剤（
６ｂ）を高い圧力で充填したとしても前記閉塞部分が栓
となって新たは充填した接着剤（６ｂ）が内周反射面側
開口（４）側に溢出しない。■In this state, the adhesive (
Even if the adhesive (6b) is filled with high pressure, the closed portion acts as a plug and the newly filled adhesive (6b) does not overflow to the opening (4) on the inner peripheral reflective surface side.
■最後にこの接着剤（６ｂ）を加熱硬化させて両者を固
着する。(2) Finally, the adhesive (6b) is heated and cured to fix both.
■ここでランプ取付孔（２）と白熱電球（＾）の取付部
（５）との間隙の内周反射面ｆｆ１開口（４）近傍部分
に充填する接着剤（６ａ）、即ち、最初に充填する接着
剤（６ａ）を高粘度接着剤とすると、加熱時の発泡膨張
量が非常に大きく、前記閉塞効果の完全を期待出来る。■Here, fill in the adhesive (6a) near the inner peripheral reflective surface ff1 opening (4) in the gap between the lamp mounting hole (2) and the mounting part (5) of the incandescent light bulb (^), that is, fill it first. If the adhesive (6a) used is a high viscosity adhesive, the amount of foaming expansion upon heating will be very large, and the aforementioned closing effect can be expected to be complete.
（実施例） 以下、本発明を図示実施例に従って説明する。(Example) Hereinafter, the present invention will be explained according to illustrated embodiments.
凹面反射鏡（１）は図のように碗状の反射部（８）と、
その底部中央に突設された取付筒（７）とで構成されて
おり、取付筒（））にランプ取付孔（２）が穿設されて
いる。このランプ取付孔り２）は取付筒（ア）の内外に
連通しており、白熱電球（＾）の取付部（５）であるピ
ンチシール部（５ａ）より１回り大きい形状となってい
る０反射部（８）の内周凹面には例えば金属蒸着法によ
る金属反射皮膜が形成されたり、又は、可視光線だけを
前方に反射させ、赤外線を透過させて背面側に放射させ
る選択透過膜などが適宜形成される事になる。The concave reflecting mirror (1) has a bowl-shaped reflecting part (8) as shown in the figure,
It consists of a mounting tube (7) protruding from the center of the bottom, and a lamp mounting hole (2) is bored in the mounting tube (7). This lamp mounting hole 2) communicates with the inside and outside of the mounting tube (A), and has a shape that is one size larger than the pinch seal part (5a) which is the mounting part (5) of the incandescent light bulb (^). For example, a metal reflective film is formed on the inner circumferential concave surface of the reflective part (8) by a metal vapor deposition method, or a selective transmission film that reflects only visible light forward and transmits infrared rays and emits them to the rear side. It will be formed as appropriate.
白熱電球（＾）は、例えばハロゲン電球のようなもので
ある。ここでハロゲン電球を例にとって説明すると、ガ
ラス管（１４）内に１対の内部リード棒（９）を配設し
、内部リード棒（９）ｌ？ｆｌにフィラメント（１１）
を架設しである。内部リード棒（９）の基部はガラス管
（１４）のピンチシール部（５ｍ） （この部分が前述
のように取付部（５）となる、）に埋入されておリ、ピ
ンチシール部〈５ａ）に埋設されているモリブデン金属
箔（１２）に溶接されている。又、このモリブデン金属
箔（１２）には外部リード棒（１０）が溶接されており
、その自由端がピンチシール部（５ａ）に導出されてい
る。尚、ガラス管（１４）の材質によっては内外のリー
ド棒を一体にし、モリブデン金属箔（１２）を介さずに
直接ピンチシール部（５ａ）を貫くように配置しても良
い。An incandescent light bulb (^) is something like a halogen light bulb, for example. Taking a halogen light bulb as an example, a pair of internal lead rods (9) are arranged inside a glass tube (14), and the internal lead rods (9) l? filament in fl (11)
is being constructed. The base of the internal lead rod (9) is embedded in the pinch seal part (5 m) of the glass tube (14) (this part becomes the mounting part (5) as described above), and the pinch seal part It is welded to the molybdenum metal foil (12) embedded in 5a). Further, an external lead rod (10) is welded to this molybdenum metal foil (12), and its free end is led out to the pinch seal portion (5a). Depending on the material of the glass tube (14), the inner and outer lead rods may be integrated and arranged so as to directly penetrate the pinch seal portion (5a) without using the molybdenum metal foil (12).
接着剤（６）は、通常、無機接着剤が用いられるもので
あり、最初に使用する接着剤（６ａ）（即ち、ランプ取
付孔（２）の内周反射面側開口（４）近傍部分に形成さ
れる接着剤層）は高粘度であり、例えば２゜０００〜１
０，０００ホ４ズ（通常ハフ、０００；Ｉ？イズ程度）
のものが用いられる。後にランプ取付孔（２）の外面側
開口（３）から充填される接着剤（６ｂ）はこれより低
粘度で５０〜１，０００ボイズ程度のものが用いられる
。The adhesive (6) is usually an inorganic adhesive. The adhesive layer (formed) has a high viscosity, e.g.
0,000 ho 4s (usually huff, 000; I?is level)
are used. The adhesive (6b) that is later filled from the outer opening (3) of the lamp mounting hole (2) has a lower viscosity than this, and has a viscosity of about 50 to 1,000 voids.
しかして、凹面反射鏡（１）のランプ取付孔（２）と白
熱電球（＾）の取付部（５）であるピンチシール部（５
ａ）との間に出来る間隙の内周反射面側開口（４）近傍
部分に接着剤（６ａ）を充填するのであるが、充填方法
は例えば以下の方法（勿論、これに限られるものではな
いが、）がある。Therefore, the pinch seal part (5) which is the lamp mounting hole (2) of the concave reflector (1) and the mounting part (5) of the incandescent light bulb (^)
The adhesive (6a) is filled in the gap formed between the adhesive (6a) and the inner peripheral reflective surface side opening (4), for example, the following method (of course, it is not limited to this) However, there is).
ＬＬ！Ｌ法−・・・ランプ取付孔（２）の内周反射面側
開口（４）近傍部分に高粘度接着剤層（６ａ）を形成す
る。LL! L method--A high viscosity adhesive layer (6a) is formed in the vicinity of the opening (4) on the inner peripheral reflective surface side of the lamp mounting hole (2).
第二正ｊＬ法−・・・ランプ取付孔（２）の内周反射面
側開口（４）近傍部分に対応する白熱電球（＾）の取付
部（５）の基部外周に高粘度接着剤層（６ａ）を形成す
る。Second positive jL method - High viscosity adhesive layer on the outer periphery of the base of the incandescent light bulb (^) mounting part (5) corresponding to the area near the inner reflective surface side opening (4) of the lamp mounting hole (2) (6a) is formed.
ＬＩＩＬ・＝−ランプ取付孔（２）と白熱電球（＾）の
取付部（５）との間隙の内周反射面側開口（４）近傍部
分に高粘度接着剤（６ａ）を充填する。LIIL·=-Fill a high viscosity adhesive (6a) into the gap between the lamp mounting hole (2) and the mounting portion (5) of the incandescent light bulb (^) near the opening (4) on the inner peripheral reflective surface side.
このようにした後第１，２方法ではランプ取付孔（２）
に白熱電球（＾）の取付部（５）を挿入した後（第３方
法では既に白熱電球（Δ）が挿入されており、後から接
着剤（６ａ）が充填される。）、ＬＣＬを合わせ、続い
てこの高粘度接着剤層（６ａ）を加熱して発泡膨張させ
ると共に硬化させてランプ取付孔（２）と白熱電球（＾
）の取付部（５）との間隙の内周反射面側開口（４）近
傍部分を閏塞する。然る後、前記間隙の外面側聞口（３
）から低粘度接着剤（６ｂ）を充填し、加熱硬化させて
両者を固着する。この場合低粘度接着剤（６ｂ）の充填
は高粘度接着剤（６ａ）による閉会のために内周反射面
側に湿田しないものであるから通常より高い圧力で充填
でき、従って充填ムラを防ぐ事も可能である。このよう
に最初に内周反射面側開口（４）をｍｘしておいてから
低粘度接着剤（６ｂ）の充填を行うため、接着剤（６ｂ
）の内周反射面側への漏れが皆無となる。After doing this, in the first and second methods, the lamp mounting hole (2)
After inserting the mounting part (5) of the incandescent light bulb (^) into the (in the third method, the incandescent light bulb (Δ) is already inserted and the adhesive (6a) will be filled later), align the LCL. Next, this high viscosity adhesive layer (6a) is heated to expand and harden to form a lamp mounting hole (2) and an incandescent light bulb (^).
) in the vicinity of the opening (4) on the inner peripheral reflective surface side of the gap with the mounting portion (5). After that, the outer surface side opening (3
) is filled with a low viscosity adhesive (6b), and the two are fixed by heating and curing. In this case, the low viscosity adhesive (6b) is filled with a higher pressure than usual because it is closed by the high viscosity adhesive (6a) and does not wet the inner reflective surface side, which prevents uneven filling. is also possible. In this way, the inner reflective surface side opening (4) is mx first and then the low viscosity adhesive (6b) is filled.
) leakage to the inner reflective surface side is completely eliminated.
尚、高粘度接着剤（６ａ）による１塞は完全に行なわれ
るのが望ましいが、低粘度接着剤（６ｂ）の充填に差し
支えがなければ一部において通孔があっても差し支えな
いものである。It is preferable that the high viscosity adhesive (6a) be completely sealed, but if it does not interfere with the filling of the low viscosity adhesive (6b), it is acceptable to have some holes. .
（本発明の効果）
本発明は叙上のように、第２回目の接着剤の充填は、第
１回目の接着剤による内周反射面側開口近傍部分の１塞
のために内周反射面側に湿田しないものであるから、従
来のように充填ムラや充填過多によって内周反射面側開
口へ漏れるというような外観不良を防止出来、加えて前
記第１回目の接着剤のＩＴ４″ｍにより通常より高い圧
力で第２回目の接着剤の充填でき、充填ムラを防ぐ事も
可能であると言う利点もある。(Effects of the Present Invention) As described above, the present invention provides that the second filling of adhesive is performed on the inner circumferential reflective surface in order to close the portion near the opening on the inner circumferential reflective surface side with the first adhesive. Since there is no wet field on the side, it is possible to prevent appearance defects such as leakage into the opening on the inner peripheral reflective surface side due to uneven filling or overfilling, which is the case with conventional methods. Another advantage is that the second adhesive can be filled with a higher pressure than usual, and uneven filling can be prevented.
尚、第３項にように、ランプ取付孔と白熱電球の取付筒
との間隙の内周反射面側開口近傍部分に充填する接着剤
を高粘度接着剤とする事によって第１回目の接着剤を塗
着する時、接着剤のなれかなく反射鏡側内周面を汚さず
、非常に美１．い充填が出来るものである。In addition, as described in Section 3, by using a high-viscosity adhesive to fill the gap between the lamp mounting hole and the incandescent bulb mounting tube near the opening on the inner peripheral reflective surface side, the first adhesive 1. When applying, the adhesive does not run and does not stain the inner circumferential surface of the reflective mirror, making it very beautiful. This allows for tight filling.
第１図・・・本発明の１実施例の断面図、第２図・・第
１図に対して直角に切った場合の断面図
第３図・・・従来例の断面図
＾）・・・白熱電球
１）・・・凹面反射鏡 （２）・・・ランプ取付孔３
）・・・外面側開口 ４）・・・内周反射面側開口
５）・・・取付部 ５ａ）・・・ピンチシール
部６ａ）・・・高粘度接着剤 ８ｂ）・・・低粘度接着
剤ア）・・・取付筒 ８）・・・反射部９）・
・・内部リード棒 １０）・・・外部リード棒１１）
・・・フィラメンｌ−１２）・・・モリブデン金属箔（
１３）・・・発光部
（１４）・・・ガラス管Fig. 1: A sectional view of one embodiment of the present invention, Fig. 2: A sectional view taken at right angles to Fig. 1. Fig. 3: A sectional view of a conventional example.・Incandescent light bulb 1)...Concave reflector (2)...Lamp mounting hole 3
)...External opening 4)...Inner reflective surface opening 5)...Mounting section 5a)...Pinch seal section 6a)...High viscosity adhesive 8b)...Low viscosity adhesive Agent a)...Mounting tube 8)...Reflector part 9)
...Internal lead rod 10)...External lead rod 11)
... filament l-12) ... molybdenum metal foil (
13)...Light emitting part (14)...Glass tube
Claims (3)
プ取付孔の内周反射面側開口近傍部分又はランプ取付孔
の内周反射面側開口近傍部分に対応する白熱電球の取付
部のいずれか一方乃至両方に基部外周に接着剤層を形成
し、続いてランプ取付孔に白熱電球の取付部を挿入した
後、接着剤層を加熱硬化させてランプ取付孔と白熱電球
の取付部との間隙の内周反射面側開口近傍部分を閉塞し
、然る後、前記間隙の外面側開口から接着剤を充填し、
硬化させて両者を固着する事を特徴とする凹面反射鏡付
き白熱電球の取付方法。(1) A lamp mounting hole is drilled in the bottom of the concave reflector, and the incandescent light bulb mounting part corresponds to the part of the lamp mounting hole near the opening on the inner reflective surface side or the part near the opening of the lamp mounting hole on the inner peripheral reflective surface side. Form an adhesive layer around the outer periphery of the base on one or both of them, then insert the incandescent light bulb mounting part into the lamp mounting hole, and then heat and harden the adhesive layer to connect the lamp mounting hole and the incandescent light bulb mounting part. and closing a portion of the gap near the opening on the inner peripheral reflective surface side, and then filling an adhesive from the opening on the outer surface side of the gap,
A method for installing an incandescent light bulb with a concave reflector, which is characterized by curing and fixing the two.
プ取付孔に白熱電球の取付部を配置し、ランプ取付孔と
白熱電球の取付部との間隙の内周反射面側開口近傍部分
に接着剤を充填した後加熱硬化させて内周反射面側開口
近傍部分を閉塞し、続いて前記間隙の外面側開口から接
着剤を充填し、硬化させて両者を固着する事を特徴とす
る凹面反射鏡付き白熱電球の取付方法。(2) Drill a lamp mounting hole at the bottom of the concave reflector, place the incandescent light bulb mounting part in the lamp mounting hole, and place the incandescent light bulb mounting part in the lamp mounting hole near the opening on the inner reflective surface side of the gap between the lamp mounting hole and the incandescent light bulb mounting part. The adhesive is filled in the gap and then cured by heating to close the area near the opening on the inner reflective surface side, and then the adhesive is filled from the opening on the outer side of the gap and hardened to fix both. How to install an incandescent light bulb with a concave reflector.
孔と白熱電球の取付部との間隙の内周反射面側開口近傍
部分に充填する接着剤を高粘度接着剤とする事を特徴と
する凹面反射鏡付き白熱電球の取付方法。(3) In the mounting method according to claim 1 or 2, the adhesive filled in the vicinity of the opening on the inner reflective surface side of the gap between the lamp mounting hole and the mounting portion of the incandescent light bulb is a high-viscosity adhesive. How to install an incandescent light bulb with a concave reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63275936A JPH02123607A (en) | 1988-10-31 | 1988-10-31 | Mounting method of incandescent lamp with concave reflecting mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63275936A JPH02123607A (en) | 1988-10-31 | 1988-10-31 | Mounting method of incandescent lamp with concave reflecting mirror |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02123607A true JPH02123607A (en) | 1990-05-11 |
| JPH0551142B2 JPH0551142B2 (en) | 1993-07-30 |
Family
ID=17562493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63275936A Granted JPH02123607A (en) | 1988-10-31 | 1988-10-31 | Mounting method of incandescent lamp with concave reflecting mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02123607A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100293345B1 (en) * | 1997-11-10 | 2001-11-22 | 구자홍 | Reflective Structure of Halogen Lamp for Microwave Oven |
| JP2016131135A (en) * | 2015-01-15 | 2016-07-21 | ウシオ電機株式会社 | Both-end sealed short arc flash lamp |
| CN105914127A (en) * | 2015-02-19 | 2016-08-31 | 优志旺电机株式会社 | Short arc type flash lamp with both ends sealed |
-
1988
- 1988-10-31 JP JP63275936A patent/JPH02123607A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100293345B1 (en) * | 1997-11-10 | 2001-11-22 | 구자홍 | Reflective Structure of Halogen Lamp for Microwave Oven |
| JP2016131135A (en) * | 2015-01-15 | 2016-07-21 | ウシオ電機株式会社 | Both-end sealed short arc flash lamp |
| CN105810553A (en) * | 2015-01-15 | 2016-07-27 | 优志旺电机株式会社 | Both-end sealed type short arc flash lamp |
| CN105914127A (en) * | 2015-02-19 | 2016-08-31 | 优志旺电机株式会社 | Short arc type flash lamp with both ends sealed |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0551142B2 (en) | 1993-07-30 |
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