JPH0285739A - Method for detecting internal pressure of sealed container - Google Patents
Method for detecting internal pressure of sealed containerInfo
- Publication number
- JPH0285739A JPH0285739A JP23779988A JP23779988A JPH0285739A JP H0285739 A JPH0285739 A JP H0285739A JP 23779988 A JP23779988 A JP 23779988A JP 23779988 A JP23779988 A JP 23779988A JP H0285739 A JPH0285739 A JP H0285739A
- Authority
- JP
- Japan
- Prior art keywords
- internal pressure
- container
- pressure
- sealed container
- internal
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 28
- 230000006866 deterioration Effects 0.000 claims description 10
- 230000001954 sterilising effect Effects 0.000 claims description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 235000006468 Thea sinensis Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 235000020333 oolong tea Nutrition 0.000 description 2
- 235000013324 preserved food Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、飲食物等の充填密封された缶等の密封容器の
内圧を検出する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting the internal pressure of a sealed container such as a can filled with food or drink.
従来、飲食物等の充填、密封された缶等の密封容器の内
圧検査方法として、陰圧缶については、平坦な蓋部また
は底部を打撃して発生する打音の周波数を測定するかも
しくはこの打音の減衰時間を測定する方法、あるいは内
圧による蓋部または底部の変形を光学的凹面鏡作用によ
り光の集光力として測定する方法等が知られている。ま
た陽圧缶については、缶壁面を外部から局部的に押圧し
て弾性的に変位させ、この変位に対する反力を測定する
方法や、缶胴の外径より僅かに狭い間隔で配置された２
組のロールの間に缶胴を挾持し、異なる押込量で缶胴を
押圧してその反力の差を検出する方法等が知られている
。Conventionally, as a method for testing the internal pressure of sealed containers such as cans filled with food and drinks, etc., for negative pressure cans, the frequency of the hitting sound generated by hitting the flat lid or bottom of the can is measured, or this method is used. A method of measuring the decay time of a tapping sound, or a method of measuring the deformation of the lid or bottom due to internal pressure as the light gathering power using an optical concave mirror effect is known. In addition, for positive pressure cans, there are methods in which the can wall is locally pressed from the outside to cause elastic displacement and the reaction force against this displacement is measured, and two
A method is known in which a can body is held between a set of rolls, and the can body is pressed by different pushing amounts to detect the difference in reaction force.
これらの方法は、いずれも密封容器の漏洩の有無を検査
するため、レトルト殺菌を必要とする場合はその前工程
または後工程において内容物が常温の状態において行わ
れ、内容物が熱間充填される場合は熱間充填後内容物が
常温の状態において行われている。また、製品の出荷前
に微生物による内容物の変敗を検査するなめ、これらの
方法が常温において用いられている。All of these methods inspect sealed containers for leakage, so if retort sterilization is required, the process is carried out with the contents at room temperature in the pre- or post-process, and the contents are hot-filled. In the case of hot filling, the contents are kept at room temperature after hot filling. In addition, these methods are used at room temperature to inspect the contents for deterioration caused by microorganisms before shipping the product.
しかしながら、これら従来の密封容器の内圧検査方法に
は次の問題点がある。However, these conventional methods for testing the internal pressure of sealed containers have the following problems.
（１）正常な密封容器内圧が大気圧近辺のＲ陽圧または
微陽圧の場合は、容器に漏洩があっても、容器内圧を測
定することによってこのような漏洩を検出することは極
めて困難である。(1) If the normal internal pressure of a sealed container is R positive pressure or slight positive pressure near atmospheric pressure, even if there is a leak in the container, it is extremely difficult to detect such a leak by measuring the container internal pressure. It is.
（２）正常な密封容器内圧が陽圧の場合、容器の漏洩か
充分に大きければ、このような漏洩を有するものは内圧
が大気圧となっているので、容器内圧を測定することに
より容易に検出することができるか、漏洩が極めて微細
なものであって容器内圧が正常値より充分に下っていな
ければ、薄波の有無を判別し難い。(2) If the normal internal pressure of a sealed container is positive pressure, if the leakage from the container is large enough, it can be easily detected by measuring the internal pressure of the container, since the internal pressure of such a leakage is atmospheric pressure. It is difficult to determine the presence or absence of thin waves unless the leakage is extremely minute and the internal pressure of the container is sufficiently lower than the normal value.
（３）製品の出荷前に微生物等による内容物の変改を検
査する場合は、内容物の変敗に帰因する炭酸ガスの発生
による内圧上昇を検出するものであるから、内容物の変
敗が進行して比較的多量の炭酸ガスが容器のヘッドスペ
ースを占めている場合は容器内圧を測定することにより
このような変成品を容易に検出できるが、内容物の変改
が微少な段階では発生する炭酸ガスの量も少く、しかも
発生した炭酸ガス中かなりの部分が内容液中に溶解する
ので、容器のヘッドスペース中に存在する炭酸ガスの量
は比較的に小量であり、容器内圧の上昇も小さい。した
がって、陰圧缶、陽圧缶いずれの場合でも、このように
内容物の変敗が微少な段階では容器内圧を測定しても変
成品を正確に判別することは難しい。(3) When inspecting the contents for changes due to microorganisms, etc. before shipping the product, the purpose is to detect an increase in internal pressure due to the generation of carbon dioxide gas due to the deterioration of the contents. If a relatively large amount of carbon dioxide gas occupies the head space of the container as the loss progresses, such altered products can be easily detected by measuring the internal pressure of the container, but if the contents are only slightly altered, Since the amount of carbon dioxide gas generated is small, and a considerable portion of the carbon dioxide gas is dissolved in the liquid content, the amount of carbon dioxide gas present in the head space of the container is relatively small. The increase in internal pressure is also small. Therefore, in both negative-pressure cans and positive-pressure cans, it is difficult to accurately identify denatured products even if the internal pressure of the container is measured at such a stage where the contents are only slightly degraded.
よって、本発明は、上記従来の密封容器の内圧検査方法
の問題点を解決するためになされたものであって、正常
な密封容器内圧が大気圧近辺の微陽圧または微陽圧の場
合、または正常な内圧が陽圧であって漏洩が微細なため
に容器内圧の差が比較的に小さい場合、または製品の出
荷前の変成品の検査において内容物の変改が微少な段階
にある場合でも、密封容器の内圧を検出することができ
、漏洩または変敗の有無を容易にかつ正確に判別するこ
とができる密封容器の内圧検出方法を提供しようとする
ものである。Therefore, the present invention was made in order to solve the problems of the above-mentioned conventional method for inspecting the internal pressure of a sealed container. Or, if the normal internal pressure is positive and the leakage is minute, the difference in container internal pressure is relatively small, or if the content is at a minor stage of alteration during inspection for altered products before product shipment. However, it is an object of the present invention to provide a method for detecting the internal pressure of a sealed container, which can detect the internal pressure of the sealed container and easily and accurately determine whether there is leakage or deterioration.
〔課題を解決するための手段および作用〕上記目的を達
成するため、本発明の密封容器の内圧検出方法は、密封
容器の内部温度が４０℃〜９０°Ｃの時に密封容器の内
圧を検査することを特徴とするものである。[Means and effects for solving the problem] In order to achieve the above object, the method for detecting the internal pressure of a sealed container of the present invention tests the internal pressure of the sealed container when the internal temperature of the sealed container is between 40°C and 90°C. It is characterized by this.
密封容器の内圧は容器内部の温度の上昇に伴って増大す
る１本発明はこの事実に着目してなされたものであって
、密封容器の内部温度が４０℃〜９０゛Ｃの範囲におい
ては、正常な密封容器内圧が大気圧近辺の、微陽圧また
は微陽圧の場合でも、容器に漏洩がなければ内圧は大気
圧から相当量増大する一方容器に漏洩があれば内圧は大
気圧近辺に留まるので、公知の検出装置を使用して容器
の内圧を測定することにより容器の漏洩の有無を容易に
検出することができる。また正常な密封容器内圧が陽圧
の場合、漏洩が極めて微細なものであって常温では正常
値との内圧の差が判別し難い場合でも、４０℃〜９０℃
に昇温されな状態では正常な内圧値と漏洩容器の内圧値
との間の偏差値が増幅されて測定されるから、このよう
な場合であっても漏洩の有無を検出することが可能とな
る。The internal pressure of a sealed container increases as the temperature inside the container increases. The present invention was made with attention to this fact, and when the internal temperature of the sealed container is in the range of 40°C to 90°C Even if the normal internal pressure of a sealed container is near atmospheric pressure, or slightly positive pressure, if there is no leakage in the container, the internal pressure will increase by a considerable amount from atmospheric pressure, but if there is a leakage in the container, the internal pressure will be close to atmospheric pressure. Therefore, the presence or absence of a leak in the container can be easily detected by measuring the internal pressure of the container using a known detection device. In addition, if the normal internal pressure of a sealed container is positive pressure, even if the leakage is extremely minute and the difference in internal pressure from the normal value is difficult to discern at room temperature,
In a state where the temperature is not raised, the deviation value between the normal internal pressure value and the internal pressure value of the leaking container is amplified and measured, so it is possible to detect the presence or absence of a leak even in such a case. Become.
本発明の一態様として、密封容器がレトルト殺菌を必要
とする場合または内容物を容器に熱間充填直後封する場
合は、本発明の方法はレトルト殺菌または熱間充填直後
において密封容器の内圧を検査する。すなわち、レトル
ト殺菌直後または熱充填直後において、密封容器が前記
４０℃〜９０℃の範囲内の余熱を保っている状態で密封
容器の内圧を検査すれば、容器を前記温度に加熱するな
めになんら特別の工程を必要とせず極めて便利であり、
経済的である。もちろん、このような便利さと経済性を
度外視すれば、レトルト殺菌の前か後の容器の内部温度
が常温の時または熱間充填径内部温度が常温に冷却して
から密封容器を加熱して４０゛Ｃ〜９０℃に昇温させて
から内圧を測定してもよい。As an aspect of the present invention, when the sealed container requires retort sterilization or the contents are sealed immediately after hot filling the container, the method of the present invention reduces the internal pressure of the sealed container immediately after retort sterilization or hot filling. inspect. In other words, if the internal pressure of the sealed container is inspected immediately after retort sterilization or hot filling while the sealed container maintains residual heat within the range of 40°C to 90°C, it is determined that there is no need to heat the container to the above temperature. It is extremely convenient and does not require any special process.
Economical. Of course, ignoring such convenience and economy, it is possible to heat a sealed container when the internal temperature of the container is at room temperature before or after retort sterilization, or after the internal temperature of the hot filling diameter has cooled to room temperature. The internal pressure may be measured after raising the temperature to 90°C to 90°C.
また本発明の一態様においては、密封容器の出荷に際し
、内容物の変敗を検出するため、該密封容器を常温から
４０℃〜９０℃まで加熱昇温させてから密封容器の内圧
を検査する。このように容器の内部温度を昇温させるこ
とにより、温度上昇に伴う容器内圧の通常の増大に加え
て、常温では内容溶液中に溶解していた変改に帰因する
炭酸ガスが気化することにより容器内圧をさらに上昇さ
せるので、正常な内圧値と変成品の内圧値との偏差値は
−そう拡大増幅されて検出される。したがって、常温で
は正常な内圧値と変成品の内圧値との偏差値が従来の装
置では判別不可能であった程度の小さな値であっても、
本発明の方法によれば容易に検出することが可能となる
。Further, in one aspect of the present invention, in order to detect deterioration of the contents when shipping the sealed container, the internal pressure of the sealed container is inspected after heating the sealed container from room temperature to 40°C to 90°C. . By raising the internal temperature of the container in this way, in addition to the normal increase in the internal pressure of the container that accompanies the temperature increase, the carbon dioxide gas resulting from the denaturation that would be dissolved in the content solution at room temperature is vaporized. Since the internal pressure of the container is further increased, the deviation value between the normal internal pressure value and the internal pressure value of the altered product is amplified and detected. Therefore, even if the deviation value between the normal internal pressure value and the internal pressure value of the transformed product at room temperature is so small that it could not be determined with conventional equipment,
According to the method of the present invention, it becomes possible to detect it easily.
本発明の方法において、容器内圧の検査に適当な容器の
内部温度の範囲は４０℃〜９０°Ｃである。In the method of the present invention, the range of internal temperature of the container suitable for testing the internal pressure of the container is 40°C to 90°C.
容器の内部温度が４０°Ｃ未満では漏洩や変敗の有無を
正確に判別するために必要な増幅された内圧の偏差値が
得に＜＜、一方９０℃を超える内部温度は本発明の目的
とする判別上不必要である上に、容器内容物に過度の熱
履歴を加えることにより内容物の劣化を生じるおそれが
あり、また容器内の陽圧が高い場合は容器の膨出変形や
破裂を生じるおそれもあるので、ともに好しくない。If the internal temperature of the container is less than 40°C, the deviation value of the amplified internal pressure necessary to accurately determine the presence or absence of leakage or deterioration is particularly low.On the other hand, if the internal temperature exceeds 90°C, Not only is this unnecessary for determining the content of the container, but excessive heat history may cause the contents to deteriorate, and if the positive pressure inside the container is high, the container may bulge, deform, or burst. Both are unfavorable as they may cause
１例として内容物充填金属缶詰の温度と内圧との関係を
第１図に示す。As an example, FIG. 1 shows the relationship between the temperature and internal pressure of a metal can filled with contents.
本発明の方法は、上記のとおり、正常な内圧が大気圧近
辺の微陽圧または微陽圧の密封容器および正常な内圧が
陽圧である密封容器における漏洩の有無の検出および正
常な内圧が陽圧であるか陽圧であるかを問わず製品の出
荷前に微生物等による内容物の変敗の有無を検出するた
めに特に有効であるが、これに限らず、正常な内圧が陽
圧である密封容器であっても、上記４０℃〜９０℃の内
圧測定温度において容器の内圧の正常値が大気圧近辺に
来るようなものの漏洩の有無を検出する場合以外は適用
することができる。As described above, the method of the present invention is capable of detecting the presence or absence of leakage in a sealed container whose normal internal pressure is a slight positive pressure near atmospheric pressure or a slightly positive pressure, and in a sealed container whose normal internal pressure is positive pressure. It is particularly effective for detecting the presence or absence of deterioration of the contents due to microorganisms, etc. before shipping the product, regardless of whether the product is under positive pressure, but is not limited to this. Even if the container is a sealed container, the method can be applied except in cases where the normal value of the internal pressure of the container is close to atmospheric pressure at the above-mentioned internal pressure measurement temperature of 40° C. to 90° C., except for detecting the presence or absence of leakage.
本発明の方法は、金属缶のほかＰ Ｅ ’Ｔ’ボトル等
公知の内圧検出方法および装置の適用対象となる容器に
適用することができる。The method of the present invention can be applied to containers to which known internal pressure detection methods and devices are applied, such as metal cans and PE'T' bottles.
本発明の方法は、その実施のためになんら特別の装置を
新たに必要とせず、公知の容器内圧測定方法および装置
を適宜使用して実施することができる。The method of the present invention does not require any new special equipment for its implementation, and can be implemented using appropriately known container internal pressure measuring methods and devices.
実施例１
ウーロン茶を２５０ｇアルミツーピース缶５０缶に充填
し、各缶の内圧を０．１ ｋｇ／−とするためにヘッ
ドスペースに窒素ガスを４℃で充填した。Example 1 Oolong tea was filled into 50 250 g aluminum two-piece cans, and the head space was filled with nitrogen gas at 4° C. to adjust the internal pressure of each can to 0.1 kg/−.
また缶の１つに微少な孔を穿って漏洩缶を作り同様にウ
ーロン茶を充填し、内圧が大気圧の缶とした。これらの
缶を１１５℃で２０分間レトルト殺菌した後缶の内部温
度が５０℃の時内圧測定装置として内圧検出機を使用し
て各缶の内圧を測定した。正常缶５０缶の測定内圧は０
．２ｋｇ／−〜０．８ｋＱ／−の範囲にあり、一方漏洩
缶の内圧は大気圧であった。これにより正常缶と漏洩缶
を明確に判別することができた。A leaky can was created by making a small hole in one of the cans and similarly filled with oolong tea to create a can with an internal pressure of atmospheric pressure. After retorting these cans at 115° C. for 20 minutes, the internal pressure of each can was measured using an internal pressure detector when the internal temperature of the can was 50° C. The measured internal pressure of 50 normal cans is 0.
．． 2 kg/- to 0.8 kQ/-, while the internal pressure of the leaking can was atmospheric pressure. This made it possible to clearly distinguish between normal cans and leaking cans.
比較例として、上記各缶の内部温度が常温まで降下した
後回−装置を使用し゛て各缶の内圧を測定したところ、
正常缶５０缶の測定内圧は大気圧〜０．２５ｋｇ／−の
範囲になり、漏洩缶の内圧は大気圧であった。正常缶の
測定内圧にバラツキがあるのは缶のヘッドスペースに窒
素ガスを充填する際の充填窒素ガス量のバラツキによる
ものであり、したがって常温では内圧測定により正常缶
と漏洩缶を判別することは不可能である。As a comparative example, after the internal temperature of each can had fallen to room temperature, the internal pressure of each can was measured using a device.
The measured internal pressure of the 50 normal cans ranged from atmospheric pressure to 0.25 kg/-, and the internal pressure of the leaking can was atmospheric pressure. The variation in the measured internal pressure of normal cans is due to the variation in the amount of nitrogen gas filled when filling the can's head space with nitrogen gas.Therefore, at room temperature, it is impossible to distinguish between normal cans and leaking cans by measuring the internal pressure. It's impossible.
実施例２
ミルク入りコーヒーを２５０ｇスチールスリーピース缶
に９０℃熱間充填した。充填の際、ミルク入りコーヒー
には、炭酸ガス産生の変成品Ｂ。Example 2 Coffee with milk was hot filled at 90° C. into a 250 g steel three-piece can. During filling, coffee with milk contains modified product B that produces carbon dioxide gas.
ｐｏｌｙｍｘａ菌の芽胞を１缶当り１０３個接種した。103 polymxa spores were inoculated per can.
未殺菌および１２３℃、３０分の殺菌処理した缶詰を３
５℃に保存した。定期的に缶詰の温度を２０℃および５
０℃とじてから缶内圧を測定した。その結果は第２図の
グラフのようであった。Canned food that has been unsterilized and sterilized at 123°C for 30 minutes is
Stored at 5°C. Regularly increase the temperature of the canned food to 20℃ and 5℃.
After the temperature was shut down to 0°C, the internal pressure of the can was measured. The results were as shown in the graph in Figure 2.
変成品が増殖して、炭酸ガスを発生したため、缶内圧が
増大した（真空度は低下する）、変敗缶を検出する缶内
圧（真空度）の境界値を、測定温度２０°Ｃでは３０ｍ
ｍＨｇ、４５℃では１５ｍｍＨｇとすると、缶内圧（真
空度）の変化から変敗缶を検出できる缶詰の保存期間は
、缶詰を加温して４５°Ｃで缶内圧を測定した場合、変
改による内圧の変化を変敗の初期に当る４日目で検出し
た。The internal pressure of the can increases (the degree of vacuum decreases) due to the proliferation of degenerated products and the generation of carbon dioxide gas.The boundary value of the internal pressure (degree of vacuum) for detecting a deteriorated can is 30 m at a measurement temperature of 20°C.
mHg, 15 mmHg at 45°C, the shelf life of canned goods during which spoiled cans can be detected from changes in can internal pressure (degree of vacuum) is 15 mmHg at 45°C. Changes in internal pressure were detected on the fourth day, at the beginning of deterioration.
常温相当の２０゛Ｃで測定した場合は７日で変動が分か
った。When measuring at 20°C, which is equivalent to room temperature, fluctuations were found in 7 days.
以上述べたように、本発明の方法によれば、密封容器の
内部温度が４０℃〜９０℃の時に密封容器の内圧を検査
することにより、正常な密封容器内圧が大気圧近辺のｆ
ｆ＆陰圧陽圧は微陽圧の場合、または正常な内圧が陽圧
であって漏洩が微細なために容器内圧の差が比較的に小
さい場合、または製品の出荷前の変成品の検査において
内容物の変敗が微少な段階にある場合でも、密封容器の
内圧を検出することかでき、漏洩または変敗の有熟を容
易にかつ正確に判別することかできる。しかも本発明の
方法は、なんら特別の装置を新たに必要とせず、既存の
装置を適宜使用することによって簡単に実施することが
できる。As described above, according to the method of the present invention, by inspecting the internal pressure of the sealed container when the internal temperature of the sealed container is between 40°C and 90°C, the normal internal pressure of the sealed container is determined to be around atmospheric pressure.
f & Negative PressurePositive pressure is used when there is a slight positive pressure, or when the normal internal pressure is positive pressure and the difference in container internal pressure is relatively small due to minute leaks, or when inspecting altered products before shipping the product. Even when the contents are at a minute stage of deterioration, the internal pressure of the sealed container can be detected, and the degree of leakage or deterioration can be easily and accurately determined. Moreover, the method of the present invention does not require any new special equipment, and can be easily implemented by appropriately using existing equipment.
第１図は内容物充填金属缶詰の温度と内圧との関係を示
すグラフ、第２図は未殺菌および殺菌処理をした缶詰の
測定温度と内圧との関係を示すグラフである。FIG. 1 is a graph showing the relationship between temperature and internal pressure of filled metal cans, and FIG. 2 is a graph showing the relationship between measured temperature and internal pressure of unsterilized and sterilized cans.
Claims (3)
容器の内圧を検査することを特徴とする密封容器の内圧
検出方法。(1) A method for detecting the internal pressure of a sealed container, which comprises testing the internal pressure of the sealed container when the internal temperature of the sealed container is between 40°C and 90°C.
器の内圧を検査することを特徴とする請求項第１項記載
の密封容器の内圧検出方法。(2) The method for detecting the internal pressure of a sealed container according to claim 1, characterized in that the internal pressure of the sealed container is inspected immediately after retort sterilization or hot filling.
め該密封容器を加熱昇温させることを特徴とする請求項
第１項記載の密封容器の内圧検出方法。(3) The method for detecting the internal pressure of a sealed container according to claim 1, characterized in that the sealed container is heated to raise its temperature in order to detect deterioration of the contents when the sealed container is shipped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23779988A JPH0285739A (en) | 1988-09-22 | 1988-09-22 | Method for detecting internal pressure of sealed container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23779988A JPH0285739A (en) | 1988-09-22 | 1988-09-22 | Method for detecting internal pressure of sealed container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0285739A true JPH0285739A (en) | 1990-03-27 |
Family
ID=17020591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23779988A Pending JPH0285739A (en) | 1988-09-22 | 1988-09-22 | Method for detecting internal pressure of sealed container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0285739A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140165708A1 (en) * | 2012-12-13 | 2014-06-19 | Tesat-Spacecom Gmbh & Co. Kg | Method for leak testing a housing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990026A (en) * | 1982-11-16 | 1984-05-24 | Kishimoto Akira | Inspecting method of sealing defect of hermetically sealed container |
| JPS59163532A (en) * | 1983-03-09 | 1984-09-14 | Hokkai Can Co Ltd | Method and device for inspecting internal pressure of tightly sealed-up vessel |
-
1988
- 1988-09-22 JP JP23779988A patent/JPH0285739A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5990026A (en) * | 1982-11-16 | 1984-05-24 | Kishimoto Akira | Inspecting method of sealing defect of hermetically sealed container |
| JPS59163532A (en) * | 1983-03-09 | 1984-09-14 | Hokkai Can Co Ltd | Method and device for inspecting internal pressure of tightly sealed-up vessel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140165708A1 (en) * | 2012-12-13 | 2014-06-19 | Tesat-Spacecom Gmbh & Co. Kg | Method for leak testing a housing |
| US9719880B2 (en) * | 2012-12-13 | 2017-08-01 | Tesat-Spacecom Gmbh & Co. Kg | Method for leak testing a housing |
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