JPS5979142A - Apparatus for automatically supplying testing thread in thread tensile strength testing machine - Google Patents
Apparatus for automatically supplying testing thread in thread tensile strength testing machineInfo
- Publication number
- JPS5979142A JPS5979142A JP18974982A JP18974982A JPS5979142A JP S5979142 A JPS5979142 A JP S5979142A JP 18974982 A JP18974982 A JP 18974982A JP 18974982 A JP18974982 A JP 18974982A JP S5979142 A JPS5979142 A JP S5979142A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- yarn
- chuck
- test
- chucks
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は糸引張試験機に於いて測定しようとする試料を
供給源より引き出すと共に一定張力を付与すべく初荷重
をかけた後、負荷をかけ糸条の強伸度を測定し、しかる
後次の新しい試料と取り替える一連の作業全自動的に行
う試験糸自動供給装置に関するものである。Detailed Description of the Invention The present invention uses a yarn tension tester to draw out a sample to be measured from a supply source, apply an initial load to give a constant tension, and then apply a load to determine the strength and elongation of the yarn. The present invention relates to an automatic test yarn supply device that automatically performs a series of operations in which the sample is measured and then replaced with the next new sample.
一般に糸引張試験機で試料の強伸度を測定する際試験長
の正確さを期するため糸条に一定の初荷重を加え、真す
ぐな集束性の良い緊張した状態とした後、更に負荷を加
オーで強伸度を測定するようにしている。Generally, when measuring the strength and elongation of a sample using a yarn tension tester, in order to ensure the accuracy of the test length, a certain initial load is applied to the yarn to create a tensioned state with good straightness and convergence, and then further load is applied. I am trying to measure the degree of strength elongation by applying the force.
従来この初荷重を加える作業は人手で行なわ↓
ていたが、この作業は試料に初荷元以上の負荷をかけず
に試験機の一対の把持具に試料の装着をする必要がある
ところから、糸張力に個人差ができないようにするため
には相当の注意力を要し、このため疲労による能率の低
下等不安定要素が多く、定量的な試験結果を得るには問
題があった。Conventionally, this work of adding the initial load was done manually↓, but since this work required the specimen to be attached to the pair of gripping tools of the testing machine without applying a load greater than the initial load on the specimen, it was A great deal of attention was required to prevent individual differences in tension, and as a result, there were many unstable factors such as reduced efficiency due to fatigue, and there were problems in obtaining quantitative test results.
そこで、この問題を解決する試みとして例えば一対の試
料把持具の前段階に駆動ローラと従動ローラとからなる
試料測寸送り機構と、一方該把持其の後段階に空気流制
御装置とを設け、試料の供給と排出?するように!−だ
もの(信公昭53−26145号)が提案されている。Therefore, as an attempt to solve this problem, for example, a sample measuring and feeding mechanism consisting of a driving roller and a driven roller is provided at the front stage of a pair of sample gripping tools, and an air flow control device is installed at a stage after the gripping. Sample supply and discharge? As you do! -Damono (Shinko No. 53-26145) has been proposed.
しかしながらこの装置は、試料の供給と排出については
、自動的に打つことができる効果はあるが試料に初張力
を付与する場合、一対のローラによる送り機構で一端を
把持し、一方排出1111は自由端となっているため初
張力會付与するのに難点があった。However, this device has the effect of being able to automatically strike the sample for supply and discharge, but when applying initial tension to the sample, one end is gripped by a feeding mechanism using a pair of rollers, while the discharge 1111 is free. Because it was at the edge, it was difficult to apply initial tension.
そこで本発明は上述の欠点を解消せんとするもので、そ
の目的とするところけ糸引張試験機如試料の供給と排出
を連続的に自動的に行うことができるようにすると共に
試料に付与する初荷重を極めて簡単に行うことができる
試験糸自動供給装置を提供せんとするもので、本発明は
試料に負荷された荷重の検出をするロードセルを有する
固定した上部チャックの前方と該上部チャックに対して
移動可能に設けた下部チャックの後方に該上丁両チャッ
クで試験糸を把持する前に一旦試験糸供給源から引き出
された糸条全把持するクランプ装置?設けると共に前記
下部チャックと前記後方クランズ装置との間に試験糸に
初荷重全付与する装置を設け、更に前記後方クランプ装
置の次に試験糸供給源から試験糸を連続的に引き出す吸
引装置を設けたことを特徴とするものである。Therefore, the present invention aims to solve the above-mentioned drawbacks, and its purpose is to make it possible to continuously and automatically supply and discharge a sample like a drawn thread tensile tester, and to apply It is an object of the present invention to provide an automatic test yarn feeding device that can perform the initial load extremely easily. On the other hand, is there a clamping device that grips the entire yarn pulled out from the test yarn supply source before gripping the test yarn with both upper chucks behind the lower chuck that is movably installed? In addition, a device is provided between the lower chuck and the rear clamp device to apply the entire initial load to the test yarn, and a suction device is further provided next to the rear clamp device to continuously draw out the test yarn from the test yarn supply source. It is characterized by:
次に本発明を寅梅する装置の1例を図面について説明す
ると、1は測定しようとする試料の供給源となる巻取チ
ーズ、2は糸道ガイド、5け前記巻取チーズ1から糸道
ガイド2を介し引き出された糸条の把持と解放を司る前
方クランプ装置で、該装置は第2図に示すようにコ字状
の固定板3aとこの固定板に取付られたエアシリンダー
6bとからなるもので、試料となる糸条Yけ固定板の内
側面3 a/とエアシリンダー6bのプランジャーの先
のクランプフエス6b′とで挾持されるものである。4
け空気圧駆動装置。Next, an example of an apparatus for implementing the present invention will be explained with reference to the drawings. 1 is a rolled cheese serving as a supply source of the sample to be measured, 2 is a thread guide, and 5 is a thread guide from the rolled cheese 1 to the This is a front clamp device that controls the gripping and release of the yarn pulled out through the guide 2. As shown in FIG. 2, this device consists of a U-shaped fixing plate 3a and an air cylinder 6b attached to this fixing plate. The specimen is clamped between the inner surface 3a/ of the yarn fixing plate serving as a sample and the clamp face 6b' at the tip of the plunger of the air cylinder 6b. 4
Pneumatic drive device.
(後述する)に連辿さtlて糸条の把持解放を司る上部
エアチャックで、核チャックには円筒状体の先端部4′
に1対のチャックフエス4a14a′が取付られでいる
と共に一方筒状体の底部4“に糸道ガイド4bが取付ら
ノ1、唄に上端4“には測定しようとする試料の強度全
検出するロードセル4Cが増刊られているものである。(described later) is an upper air chuck that controls the gripping and release of the yarn by continuously following the tl.
A pair of chucks 4a14a' are attached to the cylindrical body, and a thread guide 4b is attached to the bottom 4'' of the cylindrical body, and a load cell is attached to the upper end 4'' to detect the entire strength of the sample to be measured. This is an extra edition of 4C.
5は前記上部チャック4と対をなして、試料の把持、解
放を司る下部チャックで、該下部チャックは試料を引張
するよう釦固定した上部チャック4に対して移動可能に
設けられているものであり前記チャック4と同様にチャ
ックフエス5a。Reference numeral 5 denotes a lower chuck that is paired with the upper chuck 4 and controls the gripping and release of the sample, and the lower chuck is provided movably relative to the upper chuck 4 fixed with a button so as to pull the sample. Same as the chuck 4, there is a chuck face 5a.
5 a/及び糸道ガイド5bが取付られている。6は気
道ガイド、7は試料に対し真すぐな集束性の良い緊張し
た状態をなす初荷重付与装置で、該装置は第3図に示す
ようにエアシリンダー7aと該シリンダーのプランジャ
ーにひも7bを介し取付られたリング状の初荷重7Cと
よりなるものである。尚この初荷重は単に円形のものば
かりでなく、第4図(イ)、(ロ)、(ハ)に示すよう
に四角、三角、切欠輪状のものであっても良い。5a/ and a thread guide 5b are attached. Reference numeral 6 indicates an airway guide, and 7 indicates an initial load applying device that puts the sample in a straight, focused, and taut state.As shown in FIG. 3, this device includes an air cylinder 7a and a string 7b attached to the plunger of the cylinder. It consists of a ring-shaped initial load 7C attached via a ring. Note that this initial load is not limited to a circular shape, but may be square, triangular, or notched ring-shaped as shown in FIGS. 4(a), (b), and (c).
8は前記前方クランプ装置と対をなし、同−形状及び機
能を有するように構成さiIた後方クランプ装置、9は
糸条吸引装置Nで、該装置はエアノズル9aと糸条貯留
かと9bとよりなるものである。即ち糸条貯留かと9b
は空気の通Aはさせるが、糸条は通過させずに堆積させ
るため多数の小孔を有するものである。Reference numeral 8 denotes a rear clamp device that is paired with the front clamp device and is configured to have the same shape and function. 9 is a yarn suction device N, which has an air nozzle 9a and a yarn storage device 9b. It is what it is. In other words, yarn storage 9b
It has a large number of small holes to allow air to pass through A, but not to allow threads to pass through.
10は空気圧駆動装置で、該装置はコンプレッサー10
aと4ボートの切換弁10 bと6ボート切換弁10
(! 、!: タイムデレーバルブ10d、10 e及
びスピードコントローラ10fとから構成されている。10 is a pneumatic drive device, which device is a compressor 10
A and 4 boat switching valve 10 B and 6 boat switching valve 10
(!,!: Consists of time delay valves 10d, 10e and speed controller 10f.
即ち4ボート切替弁1υbは試験機の中枢部(前、後ク
ランプ装置3.8.上下エアチャック4.5、初荷重付
与装置7)と吸引装置9の管路の切替を司るものである
。一方6ボート切替弁io c a、手動で糸クランプ
装置6.8、エアチャック4.5の解放及び初荷重の上
昇を行なうとき作動させるもので、はじめて糸を通す時
や較正を行なうとき、上、下のチャック間で糸が完全に
切断した場合糸をつに:ぐ117等に使用するものであ
る。更にタイムデレーパルプ10 dlo eはエア信
号の遅延をさせる役目をするもので、またスピードコン
トローラ1fJfは糸クランプ装置3.8、エアチャッ
ク4.5、初荷重付与装置7の作動速Iliを調整する
ものである。そ(2てこれらの各機器の接続関係は次の
ように構成されている。That is, the four-boat switching valve 1υb controls the switching of the pipeline between the central part of the testing machine (front and rear clamping devices 3.8, upper and lower air chucks 4.5, initial load applying device 7) and the suction device 9. On the other hand, the 6-boat switching valve io c a is operated manually to release the thread clamp device 6.8 and air chuck 4.5 and to raise the initial load. If the thread is completely cut between the lower chucks, it is used to tie the thread: 117, etc. Furthermore, the time delay pulp 10 dlo e serves to delay the air signal, and the speed controller 1fJf adjusts the operating speed Ili of the thread clamp device 3.8, air chuck 4.5, and initial load applying device 7. It is something. (2) The connection relationship of each of these devices is configured as follows.
1!11ちコンプレノザー10aは4ボート切換弁10
b[接続され、この切換弁10bは二方向に分岐され、
そのうちの一方の管路Aは試験機の中枢部に接続(2一
方他方の管路Bは吸引装置9の1吸引ノズル9aK接続
されている。前記試験機中枢部に接続される管路Aは更
に5ボート切換弁10 Cを介し更に2つに分岐され、
このうち一方はスピードコントローラ10 f ’(r
介し、前方フラング装置6及び後方クランプ装置8に接
続されていて、別の方はタイムデレーバルブ10d’i
介し、更に2つに分岐されている。そのうちの一つは初
荷重付与装置7にスピードコントローラ10f i介し
エアシリンダー7aK接続され、他方はタイムデレーバ
ルブ10e及びスピードコントローラ10f ’Th介
し上、下のエアチャック4.5に接続されている。1! 11 compressor nose 10a is 4 boat switching valve 10
b [connected, this switching valve 10b is branched in two directions,
One of the pipes A is connected to the central part of the testing machine (2, while the other pipe B is connected to the suction nozzle 9aK of the suction device 9. The pipe A connected to the central part of the testing machine is Furthermore, it is further branched into two via a 5-boat switching valve 10C,
One of these is the speed controller 10 f'(r
through which the front flang device 6 and the rear clamp device 8 are connected, and the other one is connected to the time delay valve 10d'i.
It is further branched into two. One of them is connected to the initial load applying device 7 via a speed controller 10fi, and the other is connected to the upper and lower air chucks 4.5 via a time delay valve 10e and a speed controller 10f'Th.
本発明を実施する装置の1例に上述のように構成された
もので、次にその作用について説明すると先ず最初の1
回だけ人手で、糸条巻取チーズ1より糸条を引き出し、
糸条ガイド2、前方クランプ装置3、上部エアチャック
4の糸ガイド4b、下部チャック5の糸ガイド5b、初
荷重付与装置7のリング7c、後方クラップ装置8、吸
引装置!f 9のエアノズル9a及び糸条貯留かと7b
の順で糸条全通す。ここで吸引装置9のニアノズル9a
f作動させると同時に前方クランプろ、上、下エアチャ
ック4.5及び後方クランプ装置t 8を開放状態々す
ると共に初荷tV除去するためエアシリンダー7aのプ
ランジャーを上昇せしめる。糸条は貯留かと9bに吸引
され推稍されるが、これにより試料供給源である巻取チ
ーズ1から、貯留かと9b間の糸条が連続しているので
糸引張試験機を通過する糸条kl、新旧交替することに
なる。次いで所定時間軽過後4ボート弁101)の切換
によってエアノズル9aは停止し、前方クランプ6及び
後方クラップ8にIIH力空気が導気され、クランプフ
エス面31)/と固定板3a /との間に糸条Yが把持
されること釦なる。更に一定時間後初荷車付力装置7を
作動させて、リング7Cが降1;シて糸条YK il
+)ングの重さ分だけの荷重が付加され糸条Yに張力が
伺与される。更に一定時間経過後上部エアチャック4及
び下部エアチャック5が作動して糸条Yを把持する。斯
くして糸条の強伸度測定準備が完了する。しかる後−ト
部チャック5を移動させて、同定した上部チャック4よ
り引き離すことにより糸条Yi引張するとロードセル4
Cに糸条Yの強度が検出され測定が終了することになる
。この測定が終れば今度は上述と逆に前方クランプ6、
後方クランプ8、上下エアチャック4.5を解放せしめ
ると共に初荷重を付与するエアシリンダ−7ajlr作
動させて、リング7c’l上昇せしめることにより糸条
Y[かけられた張力を消失せしめる。次いでニアノズル
9ai作動させると、貯留かご9bに糸条Yが吸引堆積
し、試@機にかけられた糸条Yが排出されると共に新し
い糸条Yが巻取チーズ1より引き出され、K験機に自動
的に供給されることになる。One example of a device for carrying out the present invention is one constructed as described above, and its operation will be explained below.
Manually pull out the yarn from the yarn winding cheese 1 once,
Yarn guide 2, front clamp device 3, yarn guide 4b of upper air chuck 4, yarn guide 5b of lower chuck 5, ring 7c of initial load applying device 7, rear clap device 8, suction device! f 9 air nozzle 9a and yarn storage cap 7b
Thread the entire thread in this order. Here, the near nozzle 9a of the suction device 9
At the same time as f is activated, the front clamp filter, upper and lower air chucks 4.5 and rear clamp device t8 are opened, and the plunger of the air cylinder 7a is raised to remove the initial load tV. The yarn is suctioned into the reservoir 9b, but this causes the yarn to pass through the yarn tension tester from the winding cheese 1, which is the sample supply source, because the yarn between the reservoir and 9b is continuous. kl, the new and old will be replaced. Next, after a predetermined period of time, the air nozzle 9a is stopped by switching the 4-boat valve 101), and IIH force air is introduced to the front clamp 6 and the rear clamp 8, and a thread is created between the clamp face surface 31)/ and the fixed plate 3a/. It becomes a button when the row Y is gripped. Furthermore, after a certain period of time, the initial cart applying force device 7 is activated, and the ring 7C is lowered.
+) A load corresponding to the weight of the ring is applied, and tension is applied to the yarn Y. Furthermore, after a certain period of time has elapsed, the upper air chuck 4 and the lower air chuck 5 operate to grip the yarn Y. In this way, preparations for measuring the strength and elongation of the yarn are completed. After that, the toe chuck 5 is moved and pulled away from the identified upper chuck 4 to pull the yarn Yi, and the load cell 4
The strength of yarn Y is detected at C, and the measurement ends. Once this measurement is completed, reverse the above and move the front clamp 6.
The rear clamp 8 and the upper and lower air chucks 4.5 are released, and the air cylinder 7ajlr that applies an initial load is operated to raise the ring 7c'l, thereby eliminating the tension applied to the yarn Y. Next, when the near nozzle 9ai is operated, the yarn Y is suctioned and deposited in the storage basket 9b, and the yarn Y that was applied to the test machine is discharged, and a new yarn Y is pulled out from the winding cheese 1 and transferred to the K test machine. It will be supplied automatically.
本発明は上述のように土部チャックの前方と下部チャッ
クの後方に該上下両チャックで試験糸を把持する前に一
旦試験糸供給源から引き出された糸条を把持するクラン
プ装置金膜けると共にff1fl nrニーt・部チャ
ックとイ麦方りランノ装置idとの1111 K試験糸
に初荷重を伺与する装+a を設け、更に前l己りラン
グ装置の次に試験糸供給倣から試験糸を連続的に引き出
す吸引装置を設りたので従来の装置に比較して、試料の
供給及び排出を自動的に迅速確実にできるのみならず、
初荷M(の付与が極めて簡単で止壁にでき、特に試料が
強伶糸の場合初荷重をかける前にその両端を一月犯J持
するので撚りもどりがなく、安心して定計的に強伸度の
測定ができる効果を奏する。As described above, the present invention includes a clamping device that grips the yarn once pulled out from the test yarn supply source before gripping the test yarn with the upper and lower chucks at the front of the Dobe chuck and the rear of the lower chuck. ff1fl nr knee t/part chuck and rice direction runno device ID 1111K A device for applying an initial load to the test yarn is installed, and then the test yarn is supplied from the test yarn supply pattern to the front rung device. Since we have installed a suction device that continuously draws out the sample, compared to conventional devices, we can not only automatically supply and discharge the sample quickly and reliably, but also
It is extremely easy to apply the initial load (M) and it can be used as a stop wall.Especially when the sample is a strong yarn, both ends are held for a month before applying the initial load, so there is no untwisting and the strength can be measured with confidence. It has the effect of being able to measure elongation.
第1図は本発明を実施する装置の1例金示す概略正面図
で、第2図は@1図の一部要部側面図で、第6図は第1
図の1部要部拡大図、第4図(イ)(ロ)(ハ)は第6
図に示す初荷重付与装置の荷重の他の実施例を示すもの
である。
6・・・・・前方クランプ装置 4・・・・・・上部
チャック4C・・・・・・ロードセル 5・・
・・・・下部チャック7・・・・・初荷重付与装置
8・・・・・後方クランプ装置9・・・・・・吸引装
置
C
多2図
$3図Fig. 1 is a schematic front view showing one example of the apparatus for carrying out the present invention, Fig. 2 is a side view of a part of the main part of Fig.
Enlarged view of the main parts of the first part of the figure, Figures 4 (a), (b), and (c) are the 6th
Another example of the load of the initial load applying device shown in the figure is shown. 6...Front clamp device 4...Upper chuck 4C...Load cell 5...
... Lower chuck 7 ... Initial load applying device
8... Rear clamp device 9... Suction device C 2 drawings $ 3 drawings
Claims (1)
1する同定した上部チャックと該チャックに対して移動
可能に設けた下部チャックとの間に試験糸を把持して引
張する糸の引張試験機に於いて、ntl記上部チャック
の前方と下部チャックの後方K 8に上下両チャックで
試験糸を把持する前に一旦試験糸供給源から引き出され
た糸条を把持するクランプ装置を設けると共に前記下部
チャックと前記後方クランプ装置との間に試験糸に初荷
重を付与する装嵌“を設け、更に前記後方クランプ装置
の次に試験糸供給源から試験糸を連続的に引き出す吸引
装置を設けたことを特徴とする試験糸自動供給装置。 24 初荷軍付与装W、はエアシリンダーのプランジ
ャーにひも金介し垂下されたリングよりなる特許請求範
囲第1項記載の試験糸自動供給装置。 6 前方及び後方クランプ装置はコ字状の固定板とエア
シリンダーのプランジャーに取付けた平板とよりなる特
許請求範囲第1項記載の試験糸自動供給装置。 4、 吸引装置はエアノズルと多数の小孔を有する貯留
かととよりなる特許請求範囲第1項記載の試験糸自動供
給装置。[Claims] 1. A test thread is held and pulled between an identified upper chuck and a lower chuck that is movable with respect to the chuck. In a yarn tensile testing machine, a clamp is installed in front of the upper chuck and behind the lower chuck K8 to grip the yarn once pulled out from the test yarn supply source before gripping the test yarn with both the upper and lower chucks. In addition to providing a device, a fitting for applying an initial load to the test yarn is provided between the lower chuck and the rear clamp device, and the test yarn is continuously pulled out from a test yarn supply source next to the rear clamp device. 24. An automatic test yarn feeding device characterized by being provided with a suction device. 24. The automatic test yarn supply device according to claim 1, wherein the initial loading device W is a ring suspended from a plunger of an air cylinder via a string. Supply device. 6. The automatic test thread supply device according to claim 1, in which the front and rear clamp devices are comprised of a U-shaped fixing plate and a flat plate attached to the plunger of an air cylinder. 4. The suction device is an air nozzle. The test yarn automatic supply device according to claim 1, comprising a reservoir having a large number of small holes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18974982A JPS5979142A (en) | 1982-10-28 | 1982-10-28 | Apparatus for automatically supplying testing thread in thread tensile strength testing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18974982A JPS5979142A (en) | 1982-10-28 | 1982-10-28 | Apparatus for automatically supplying testing thread in thread tensile strength testing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5979142A true JPS5979142A (en) | 1984-05-08 |
JPS6352337B2 JPS6352337B2 (en) | 1988-10-18 |
Family
ID=16246532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18974982A Granted JPS5979142A (en) | 1982-10-28 | 1982-10-28 | Apparatus for automatically supplying testing thread in thread tensile strength testing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5979142A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5648537A (en) * | 1979-09-21 | 1981-05-01 | Zellweger Uster Ag | Method of pretensioning yarn for tensile force tester and similar device |
-
1982
- 1982-10-28 JP JP18974982A patent/JPS5979142A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5648537A (en) * | 1979-09-21 | 1981-05-01 | Zellweger Uster Ag | Method of pretensioning yarn for tensile force tester and similar device |
Also Published As
Publication number | Publication date |
---|---|
JPS6352337B2 (en) | 1988-10-18 |
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