WO1999033709A1 - Conserves en boites a basse pression positive s'adaptant au controle de la pression interne, et corps de boite metallique - Google Patents

Conserves en boites a basse pression positive s'adaptant au controle de la pression interne, et corps de boite metallique Download PDF

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Publication number
WO1999033709A1
WO1999033709A1 PCT/JP1998/005905 JP9805905W WO9933709A1 WO 1999033709 A1 WO1999033709 A1 WO 1999033709A1 JP 9805905 W JP9805905 W JP 9805905W WO 9933709 A1 WO9933709 A1 WO 9933709A1
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WO
WIPO (PCT)
Prior art keywords
pressure
internal pressure
suitability
low
cans
Prior art date
Application number
PCT/JP1998/005905
Other languages
English (en)
Japanese (ja)
Inventor
Hiroo Ikegami
Ken Takenouchi
Kazuhiko Tsukada
Original Assignee
Toyo Seikan Kaisha, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Seikan Kaisha, Ltd. filed Critical Toyo Seikan Kaisha, Ltd.
Priority to EP98961554A priority Critical patent/EP1103470A4/fr
Priority to AU16891/99A priority patent/AU1689199A/en
Publication of WO1999033709A1 publication Critical patent/WO1999033709A1/fr

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/12Cans, casks, barrels, or drums
    • B65D1/14Cans, casks, barrels, or drums characterised by shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/12Cans, casks, barrels, or drums
    • B65D1/14Cans, casks, barrels, or drums characterised by shape
    • B65D1/16Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
    • B65D1/165Cylindrical cans
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D79/00Kinds or details of packages, not otherwise provided for
    • B65D79/005Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/008Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
    • B65D79/0081Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the bottom part thereof

Definitions

  • the present invention relates to a low positive pressure can having an internal pressure inspection suitability and a can body thereof, particularly a low positive pressure can having an internal pressure inspection suitability capable of performing an internal pressure inspection with the same accuracy as a punching inspection conventionally applied to an internal pressure inspection of a negative pressure can. It relates to a pressure can and its can. Background art
  • canned low-acid beverages such as milk-filled beverages, which are extremely susceptible to spoilage and decay, have been required to have a sealability after filling and a spoilage inspection of the contents.
  • the can lid or bottom is generally hit with an electromagnetic pulse to generate vibration, and the internal pressure is determined by the correlation between the generated sound (frequency) and the internal pressure of the can.
  • An inspection method called a percussion test is used to detect the tightness due to excessive or insufficient internal pressure, and to detect the presence or absence of expansion due to putrefactive bacteria.
  • Negative pressure cans have a degree of vacuum in the range of approximately 20 to 60 cmHg, have small pressure variations, and have a large change in natural frequency with respect to fluctuations in internal pressure. There is an advantage that leakage and deterioration of the contents can be accurately detected by percussion inspection.
  • negative pressure canning requires a highly rigid body that can withstand negative pressure, and has the problem of increased can cost because the side walls are thicker than positive pressure cans.
  • Positive pressure cans Positive-pressure canned foods usually have an internal pressure of 1. In the range of 0 ⁇ 0.3 kgi / cm 2 (gauge pressure, the same applies hereinafter), and at retort, it reaches 6. Okgf / cm 2 or more, so the bottom of the can is inside the can to withstand the internal pressure. It is formed in a dome shape that bulges. Positive pressure cans have a positive pressure applied inside the can compared to negative pressure cans, so they are less susceptible to dents even when exposed to external pressure. This has the advantage that the cost can be reduced.
  • positive pressure cans can be used to reduce the thickness of can materials.However, conventional positive pressure cans lack the suitability for internal pressure inspection and have insufficient quality assurance due to the following reasons. Until now, the contents of low-acid beverages, such as beverages with milk, are relatively thick, with the bottom of the can having a thickness of 0.24 to 0.26 mm and the can body having a thickness of about 0.2 mm. Applied to steel negative pressure cans, positive pressure cans were applied only to relatively perishable and perishable contents.
  • the positive pressure canned by conventional gas replacement method since the can internal pressure is high, generally 1. 0 ⁇ 0. 3 kgf / cm 2, even with very small pressure variations due to small leaks and corruption However, it is difficult to detect the internal pressure due to the low internal pressure fluctuation rate of the whole. . Also, The same applies to the case where the internal pressure of the can is detected based on the displacement of the lid, the bottom or the body, or the case where the internal pressure of the can is detected by pushing the body or the like at a predetermined pressure and measuring the reaction force. When the can pressure is high, the rigidity of the can increases, and the amount of change in the displacement or the reaction force is small, so that the internal pressure inspection becomes difficult.
  • the present invention solves the problems of positive pressure cans that lack the suitability for internal pressure inspection as described above, and allows the use of thin-walled cans for canning low-acid beverages such as milk-filled beverages. Specifically, it has excellent suitability for low pressure inspection such as percussion, etc., has a high ability to detect leakage and deterioration, withstands an increase in internal pressure during retort processing, and It is an object of the present invention to provide a low positive pressure can having an internal pressure inspection suitability and a can body thereof, which can reduce the thickness of the can and reduce the cost of the can.
  • the positive pressure can having the suitability for an internal pressure test of the present invention for solving the above-mentioned problems is a can which is obtained by filling and sealing the contents so that the internal pressure of the can is at least a positive pressure with respect to an external pressure.
  • the inner pressure of the can at room temperature is in the range of 0.2 to 0.8 kgf / cm 2 , preferably 0.2 to 0.6 kgi / cm 2 , so that it is suitable for internal pressure inspection. It is.
  • the can internal pressure in the range of the set pressure 0. 2 ⁇ 0. 8 kgf / cm 2 , variation ⁇ 0. 2 kgf / cm 2 or less, preferably may is ⁇ 0. 1 kgf / cm 2 or less.
  • the internal pressure inspection characteristics are For example, when performing internal pressure inspection by percussion inspection, the response of the sound (frequency) generated by the impact is small even with a small change in the internal pressure of the can, and the displacement of the outer periphery of the can is measured with a displacement meter. When performing internal pressure inspection, the response of the displacement of the measurement site to the minute change in the can internal pressure is good.Furthermore, the internal pressure is measured by pushing the outer peripheral part of the can at a predetermined pressure and measuring the reaction force. When performing an inspection, it refers to the ability to measure the internal pressure accurately, with a good response to the reaction force even for minute changes in the internal pressure of the can.
  • a seamless can having a body portion and a bottom portion integrally formed is desirable. Further, the bottom portion of the can body has an annular grounding portion, and the inside of the outer annular grounding portion is provided. It is desirable to have a bottom wall that becomes a substantially flat part, and to have internal pressure inspection suitability at the bottom. If the can is a seamless can and the bottom is a dome-shaped can, the lid or the body of the can shall be suitable for internal pressure inspection.
  • the rate of change (slope) of the vibration frequency at the bottom of the can is large, and the vibration frequency changes significantly even with a slight change in the internal pressure, confirming that the measurement of the internal pressure of the can can be detected well.
  • This range is in a positive pressure state equivalent to the vacuum level of the negative pressure can, and means that it can be punched with the same accuracy as that of the negative pressure can. If the pressure inside the can is outside the above range, the change in the vibration frequency with respect to the change in the pressure inside the can is small, resulting in poor judgment.
  • the internal pressure of the can is 0.8 kgf / cni higher than 2 kg
  • the differential pressure between the inside and outside of the can is too large during retort processing (immediately after removal from the retort kettle) if the can is to be retorted.
  • the can material In a can bottom shape with a substantially flat surface, the can material must be made thick to maintain pressure resistance, and is inferior in suitability for pressure testing.
  • the displacement of the lid, bottom, or body is measured in the can pressure range within the range of the can pressure described above, and when the internal pressure is to be inspected, good internal pressure inspection is appropriate except for the dome-shaped bottom with high rigidity.
  • the content of the positive-pressure cans is not particularly limited, and the content is a low-acid beverage, the content is sealed at a positive pressure by a gas replacement method, and the retort is sterilized after filling and sealing. It can be suitably applied to any of the following, and has an internal pressure inspection suitability at any of the bottom, the trunk, and the lid.
  • the gas replacement method referred to in the present invention is not limited to the case in which an inert gas such as nitrogen gas is blown into a head space to perform replacement, and a liquefied gas such as liquid nitrogen or a solidified gas such as dry ice is placed in a can. It also includes the case where positive pressure is generated in the can due to its vaporization and expansion.
  • the can body used for the low positive pressure can of the present invention has a body portion and a bottom portion formed integrally with a seamless, the bottom portion has an annular grounding portion near an outer peripheral portion, and the inside of the annular grounding portion is formed inside.
  • a bottom wall having a substantially flat shape and a height of 0.5 to 6 mm from the ground position, wherein the bottom wall has an inner rising wall rising up into the can;
  • the center portion of the bottom wall has applicability for percussion.
  • the shape of the bottom of the can is preferably that an annular bead having a depth of 0.1 to 4 mm from the bottom wall to the inside of the can is formed at the bottom of the inner rising wall of the annular grounding portion.
  • the ground diameter of the can bottom is 70 to 98% of the can body diameter, and the flat part diameter of the can bottom is 60 to 90% of the ground diameter.
  • the inclination angle of the rising wall be 65 to 110 °.
  • the annular bead is not limited to an inverted U-shaped cross section, but may be formed so as to have a gentle slope from the top to the bottom wall so as to continue to the bottom wall.
  • the annular bead height from the ground position of good c the bottom wall flat portion be plural rows formed not limited to one, the 0.5 deformed bottom after Les preparative belt as ⁇ is under the If it is higher than the grounding part, the thickness from the grounding to the rising part will be reduced due to molding, and this will cause a decrease in withstand voltage performance. In addition, it is not preferable that the content is small with respect to the can height, and that the material cost is relatively increased. In addition, the depth of the annular bead should be 0.1 The above range is preferable because the effect of the above is not sufficiently obtained, and when the depth is 4 mm, the molding becomes difficult.
  • the sloped wall of the riser wall is smaller by 65 °, the pressure resistance of the grounding part will be reduced, and the area of the flat bottom wall will be smaller, which may cause deterioration of suitability for internal pressure inspection. If it is too large, molding becomes difficult.
  • a metal plate such as tinplate, TFS, surface-treated copper plate, or a laminated plate obtained by laminating a synthetic resin such as a polyester film on such a metal plate is used.
  • Materials and methods for manufacturing cans are particularly limited, such as seamless cans formed by a combination of squeezing and ironing or stretching, or 3-piece cans with a lid wrapped around the bottom.
  • the thickness of the bottom of the can is reduced to 0.15 to 0.25 mm for steel and to 0.25 to 0.35 mm for aluminum. Is possible.
  • FIG. 1 is a cross-sectional view of a main part of a can body for low positive pressure cans according to an embodiment of the present invention
  • FIG. 2 is a schematic view of the main part
  • Figures 3—A, 3—B, 3—C, 3—D, and 3—E are schematic diagrams of main parts of a can for low positive pressure cans according to other different embodiments of the present invention.
  • Fig. 4-1A and Fig. 4-B are graphs showing the amount of displacement of the bottom of the can with respect to the internal pressure of the can.
  • Fig. 4-A is the case of the can of the embodiment shown in Fig. 1.
  • Fig. 4-B shows the case of the can shown in Fig. 3-A.
  • Fig. 5 is a graph showing a comparison of the internal pressure versus frequency distribution curves of the canning of positive pressure cans and negative pressure cans with can bottoms. In the case of negative pressure cans, the absolute value is shown.
  • FIG. 1 is a sectional view of a main part of a can according to an embodiment of the present invention.
  • the can body 1 is a two-piece can (seamless can) in which the body and bottom are integrally formed, a steel plate or an aluminum plate, or a composite plate formed by laminating a PET film or the like on these plates. They were formed by ironing or by combining them with stretching.
  • the bottom of the can 1 has a mountain-shaped annular grounding portion 3 and a valley-shaped annular bead 5 between a body wall 2 and a bottom wall 6.
  • the bottom of the inner riser wall 4 of the annular grounding portion 3 projects from the bottom wall surface into the can and is folded back to form an annular U-shaped bead 5 protruding into the can. ing.
  • the bottom wall 6 inside the annular bead is formed entirely flat.
  • the inclination angle ⁇ of the outer rising wall 7 of the annular ground part 3 is in the range of 5 ° to 30 °, and the inclination angle of the inner rising wall 4 is in the range of 65 ° to 110 °.
  • the height h of the center of the bottom wall from the grounding surface is such that the can bottom expands as the internal pressure increases during retort processing, and the bulge remaining on the bottom wall protrudes outward from the annular grounding part when the temperature returns to room temperature. It is not necessary to make a hole, 0.1 to 10 mm, preferably 0.5 to 6 mm.
  • the annular bead 5 plays a role of increasing the pressure resistance of the bottom against the internal pressure, and that the internal pressure resistance is improved by increasing the depth to some extent.
  • the presence of the annular bead 5 functions to increase the pressure resistance of the bottom part because the annular bead shape increases the peripheral rigidity against the swelling to the outside of the flat bottom wall with the increase of the internal pressure, and In order to obtain this effect, the depth m of the annular bead 5 is set to 0.
  • the ground diameter of the annular grounding part 3 is in the range of 70 to 98% of the can body diameter from the viewpoint of independence and strength, and the diameter of the flat part of the bottom wall is 60 It was confirmed that the formation in the range of ⁇ 90% was a good range for the internal pressure inspection at the bottom.
  • the thin cans 2-piece can withstand the can out differential pressure 5 kg f / cm 2 to be assumed at the time of retort sterilization
  • a pressure resistance can be obtained.
  • the pressure resistance is equal to the rate required for sterilizing the contents during retorting as described later. This is a strength that can withstand a pressure increase during the tilting process.
  • the thickness of the bottom of the can is 0.15 to 0.25mm for steel, and steel for aluminum, to maintain the pressure resistance and to make the plate as thin as possible. Since the pressure resistance is poor, the range of 0.25 to 0.35 mm is appropriate.
  • the bottom of the can body of this embodiment has the above-described shape, and an embodiment of a low positive pressure can having the suitability for percussion of the present invention using the can body will be described.
  • a low acid beverage with milk is hot-backed into a can and filled with liquid nitrogen or dry ice or other inert gas (hereinafter simply referred to as nitrogen) and sealed. At that time, room temperature after filling with nitrogen etc.
  • the internal pressure of the can is set to be 0.2 to 0.8 kgf / cm 2, preferably 0.2 to 0.6 kg i / cm 2 , which is lower than that of the positive pressure can which is usually carried out, and Filling and sealing are performed by controlling the filling amount of nitrogen or the like so that the set pressure maintains an accuracy of ⁇ 0.2 kgi / cm 2, preferably ⁇ 0.1 kgiZcm 2 .
  • the present invention it is important to set the internal pressure to a low value and to reduce the variation in the set pressure, so that the detected internal pressure of the can is caused by deterioration. It is possible to determine whether the pressure is simply due to the variation in the internal pressure of the can. If the bottom pressure of a conventional negative pressure can is used for the inspection of the can pressure, it is possible to accurately detect deterioration.
  • a liquefied gas such as liquid mist or dry ice, such as liquid nitrogen, and low-temperature nitrogen are placed in the head space of a can filled with contents immediately before winding.
  • a method of simultaneously filling with an inert gas such as a gas can be adopted.
  • the retort sterilization process is performed so that the pressure difference between the inside and the outside of the can during the retort process is within 5 kgi / cm 2 .
  • the pressure difference between the can and the outside of the can of 5 kgf / cm 2 is 0.2 in the present invention before the retort sterilization.
  • ⁇ 0. 8 kgf / cm 2 preferably it is set to 0. 2 ⁇ 0. 6 kgi / cm 2 , can tolerate the pressure rise during retorting to 4. 2 ⁇ 4. 8 kgi / cm 2 This means that this increase in pressure is within the range where sufficient retort treatment can be ensured to sterilize the low-acid beverage content.
  • the cans manufactured through the above processes are back-ringed against the rise in can pressure during the retort sterilization process, even though the can material is a thin-walled can made mainly of steel or aluminum.
  • the bottom of the can has sufficient pressure resistance.
  • the internal pressure of the can has an accuracy of 0.2 kgi / cm 2, preferably ⁇ 0.1 kgf / cm 2 , so that deterioration of the contents can be detected.
  • At least the center of the bottom wall of the can is a flat surface, so it has excellent tapping suitability. Therefore, according to the present invention, a low-acid beverage that requires retort sterilization can be filled in a thin two-piece can to have pressure resistance and to ensure sufficient deterioration detection ability of the contents.
  • it can be made thinner and lighter, and can be used for aluminum cans and can cost can be reduced.
  • the present invention can be variously modified within the scope of the technical idea, and is not limited to the above embodiment.
  • the positive pressure can of the present invention is not necessarily limited to punching.
  • the displacement of the outer periphery of the can such as the lid, the bottom, or the body of the can, is measured with a displacement meter and converted to the internal pressure of the can to perform a low pressure test, or the outer periphery of the can is pushed in at a predetermined pressure. It is also suitable for measuring the reaction force and converting it to the can internal pressure state to perform internal pressure inspection.
  • the measurement site on the outer periphery of the can is in a state where it is easy to accurately measure the change in the frequency, displacement, or reaction force in response to the change in the internal pressure. It is necessary to set the internal pressure range where loss can be detected. Therefore, in the present invention, the can internal pressure 0.5 at room temperature 2 ⁇ 0. 8 kgi / cm 2 is preferably set to the range of 0. 2 ⁇ 0. 6kgi / cm 2, and ⁇ respect to the set pressure 0 It was confirmed that maintaining a precision of 0.2 kgf Zcm 2, preferably ⁇ 0.1 kgfcm 2 , was a low positive pressure can with the most suitable internal pressure inspection suitability.
  • the content is not necessarily limited to low-acid beverages.
  • FIG. 3 shows various embodiments in which the shape of the can bottom of the can body of the present invention is modified. Similar effects can be obtained by employing these shapes.
  • the can body 10 in the figure (a) has a slightly larger inclination angle ⁇ of the inner rising wall 12 of the annular grounding portion 11, and the annular bead 13 has a straight line from the top to the bottom wall 14. It has a gently inclined portion 13 'that is gently inclined in a shape and continues to the bottom wall.
  • the can body 15 shown in FIG. 5B has a particularly different bottom wall shape.
  • the bottom wall 17 of the present embodiment has a flat central portion 17 ′, but an outer peripheral portion 11 ′′ is formed so as to be inclined toward the end of the gentle inclined portion 16 ′ of the annular bead 16.
  • (C) is characterized in that the annular grounding portion 21 is formed to be wide as a whole, that is, the annular grounding portion 21 has a tip portion 21 ′ And a gentle inclined surface 2 1 ′′, and an inner rising wall 22 extending from the gentle inclined surface to the annular bead 23.
  • the annular grounding portion 26 is wider than that of the embodiment shown in FIG.
  • the bottom wall 27 is formed high, corresponding to a narrow one.
  • the can body 30 shown in FIG. 3E has an annular bead formed between the annular grounding portion 31 and the flat bottom wall 34 in two lines of a four-shaped bead 32 and a ⁇ -shaped bead 33. Is equivalent to
  • the molded seamless can was filled with 190 g of milk coffee and liquid nitrogen so as to generate an internal pressure of 0.5 ⁇ 0.1 kgf / cm 2 , and then sealed and sealed.
  • Heat sterilization and cooling in the usual retort treatment step were performed to obtain positive pressure canned 100 cans. It was confirmed that the obtained can had no abnormal deformation of the can and had a pressure resistance to the retort treatment.
  • a percussion inspection was performed on all the cans obtained. As a result, it was confirmed that all the cans had proper perforation accuracy with respect to the internal pressure, and that all the cans had suitability for perforation.
  • Example 2 Using a seamless can molded in the same manner as in Example 1, 190 g of milk coffee was filled, and liquid nitrogen was filled so as to generate an internal pressure of 1.0 ⁇ 0.1 kgf / cm 2 . Thereafter, it was rolled and sealed, and then subjected to heat sterilization and cooling in a usual retort treatment step to obtain 100000 positive pressure cans. Among these, it was found that local buckling deformation occurred in the 250 rise cans on the inner riser wall, and the pressure resistance under these internal pressure conditions was insufficient. Regarding the remaining cans that have not buckled, the flat part near the annular bead has relatively large deformation. No percussion suitability was obtained.
  • the diameter of the flat portion was changed to 44 mm, and an attempt was made to obtain a seamless can under the same processing conditions as in Example 1, but the annular groove was cracked and the can was not processed. .
  • the diameter of the flat portion was changed to 26 mm in the seamless can of Example 1, and a seamless can was obtained under the same processing conditions as in Example 1, and the same as Example 1 was performed using the can.
  • 10000 cans of positive pressure canned milk coffee (190 g) were obtained.
  • the obtained cans had low pressure resistance at the bottom of the can during retort treatment, and all cans were deformed by the retort treatment and the bottom of the can was deformed.
  • Fig. 4 (a) The result is shown in Fig. 4 (a).
  • the upper right corner represents the origin at the origin
  • the vertical axis represents the displacement (mm) at the center
  • the horizontal axis represents the can pressure (kgf / cm 2 ).
  • the pressure difference between the external cans internal pressure although displacement from the initial shape of the bottom wall central portion at the time of a 5 kgf / cm 2 was about 1.5 mm, which restore the internal pressure in but remains slight deformation can bottom, in the range without any problem, the can is up to pressure differences 5kgi / cm 2 to poor deformation such packs ring It was confirmed that they did not have sufficient pressure resistance.
  • the internal pressure of the can is 0.2 to 0.8 kgf / cm 2, preferably 0.22 to 0.6 kgf / cm 2 .
  • seamless thin-walled cans can achieve the pressure resistance of the bottom of the can that withstands the increase in internal pressure during retort processing, and because the internal pressure of the can is small, the can is filled and sealed. It can reliably detect spoiled cans by internal pressure inspection.
  • the low-positive-pressure cans having the suitability for internal pressure inspection according to the present invention and the can bodies thereof can be used for decay of low-acid beverages and the like. And the ability to detect spoiled cans is high, so it is particularly useful as cans and their cans that require high detectability of spoiled cans, such as canned low-acid beverages, which are extremely susceptible to spoilage and decay. It is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Vacuum Packaging (AREA)
  • Measuring Fluid Pressure (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Non-Alcoholic Beverages (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

L'invention porte sur le corps (1) d'une boîte métallique pour conserves alimentaires, à basse pression positive, qui peut s'adapter au contrôle de la pression interne. La partie tronc (2) et la partie fond de la boîte métallique sont moulées sans soudure sous forme d'une structure intégrale, la partie fond comportant une section (3) annulaire d'appui proche d'une partie circonférentielle externe, une partie du côté intérieur de la section annulaire (3) d'appui constituant une paroi montante interne (4) s'étendant vers l'intérieur du corps de la boîte, une paroi de fond (6) pratiquement plate est formée sur le côté interne de la paroi montante (4) interne et s'étend sur une hauteur supérieure à celle de la position d'appui sur 0,5 à 6 mm. Les denrées sont conditionnées et étanchéisées dans le corps (1) de la boîte métallique à une basse pression positive de sorte que la pression interne, à température ambiante, soit comprise entre 0,2 et 0,8 kgf/cm2, de préférence entre 0,2 et 0,6, avec une amplitude de variation de +/- 0,2 kgf/cm2 et de préférence +/- 0,1 kgf/cm2, de sorte que la partie plate de la paroi de fond (6) puisse s'adapter au contrôle des chocs.
PCT/JP1998/005905 1997-12-26 1998-12-25 Conserves en boites a basse pression positive s'adaptant au controle de la pression interne, et corps de boite metallique WO1999033709A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP98961554A EP1103470A4 (fr) 1997-12-26 1998-12-25 Boite metallique ayant un dispositif de regulation de la pression
AU16891/99A AU1689199A (en) 1997-12-26 1998-12-25 Canned goods of low positive pressure having inner pressure checking adaptability, and can body of the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/366870 1997-12-26
JP36687097A JPH11193016A (ja) 1997-12-26 1997-12-26 内圧検査適性を有する低陽圧缶詰及びその缶体

Publications (1)

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WO1999033709A1 true WO1999033709A1 (fr) 1999-07-08

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PCT/JP1998/005905 WO1999033709A1 (fr) 1997-12-26 1998-12-25 Conserves en boites a basse pression positive s'adaptant au controle de la pression interne, et corps de boite metallique

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EP (1) EP1103470A4 (fr)
JP (1) JPH11193016A (fr)
KR (1) KR20000075655A (fr)
AU (1) AU1689199A (fr)
TW (1) TW522119B (fr)
WO (1) WO1999033709A1 (fr)

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US9969517B2 (en) * 2002-09-30 2018-05-15 Co2Pac Limited Systems and methods for handling plastic containers having a deep-set invertible base
DE502006007417D1 (de) 2005-02-05 2010-08-26 Ball Packaging Europe Gmbh Stapelfaehige flachbodendose
EP1813540A1 (fr) 2006-01-30 2007-08-01 Impress Group B.V. Couvercle pour une boîte et boîte avec ledit couvercle
US11897656B2 (en) 2007-02-09 2024-02-13 Co2Pac Limited Plastic container having a movable base
JP5085411B2 (ja) * 2007-12-26 2012-11-28 大和製罐株式会社 レトルト対応小容量ネジ付き缶
FR2954296B3 (fr) * 2009-12-23 2011-12-23 Impress Group Bv Boite de conserve metallique pour un produit alimentaire
JP4877538B2 (ja) * 2010-06-08 2012-02-15 東洋製罐株式会社 シームレス缶体
JP7378200B2 (ja) * 2017-12-22 2023-11-13 アルテミラ製缶株式会社 缶体
JP7456141B2 (ja) * 2019-12-11 2024-03-27 東洋製罐株式会社 シームレス缶体
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Also Published As

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JPH11193016A (ja) 1999-07-21
EP1103470A1 (fr) 2001-05-30
KR20000075655A (ko) 2000-12-26
EP1103470A4 (fr) 2006-06-21
TW522119B (en) 2003-03-01
AU1689199A (en) 1999-07-19

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