US3470672A - Equipment for packaging machines comprising a sealing ring - Google Patents

Equipment for packaging machines comprising a sealing ring Download PDF

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Publication number
US3470672A
US3470672A US3470672DA US3470672A US 3470672 A US3470672 A US 3470672A US 3470672D A US3470672D A US 3470672DA US 3470672 A US3470672 A US 3470672A
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US
United States
Prior art keywords
level
tube
filling material
pipe
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
Inventor
Alex Tuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tetra Pak AB
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Tetra Pak AB
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 Tetra Pak AB filed Critical Tetra Pak AB
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Publication of US3470672A publication Critical patent/US3470672A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3115—Gas pressure storage over or displacement of liquid
    • Y10T137/3127—With gas maintenance or application

Definitions

  • a bell-shaped sleeve member is tightly atfixed to said filler pipe at a point below the sealing means and the skirt of said sleeve member slidingly and sealingly engages the wall of said container whereby the level of the liquid introduced into the container and the inside of the sleeve form a closed space and variations of pressure inside said space are used to control the flow of viscous liquid through said filler pipe.
  • the present invention relates to the packaging art and more closely to an equipment for the control of the filling material level for the kind of packaging machines working with a packaging web material that is shaped into a tube, which is longitudinally sealed and partially filled with a preferably viscous filling material and formed into separate packages; the filling material being supplied to the tube through a filling pipe submerged in said tube.
  • the control of filling material level in packaging machines of the said special kind has long constituted a difficult technical problem.
  • the filling material consists of a liquid of low viscosity, such as for example, milk, wine, juice or similar
  • the control problems could be solved with the aid of a level :pipe submerged in the filling material.
  • the filling material is a viscous substance such as, for example, clotted milk, yogurt, fruit-juice jelly or the like
  • the difficulties cannot be overcome only by arranging a level pipe in the tube. It is true that even in these cases the differences between filling material levels in the tube and the level pipe will create a certain pressure in the level pipe, but due to the inertia of the filling material, the reaction of a change in level is suppressed considerably. Thus the system will be both insensitive and slow, and does not therefore meet the demands raised on a packaging machine control unit.
  • One object of the invention is therefore to produce a control equipment that will comply with the requirements stipulated even in cases where the filling material is viscous.
  • this equipment includes a level pipe of the kind stated, which is supplemented by a pressure amplifying sealing member by which means much greater and more rapid reaction in the level pipe will be obtained after a change in level in the tube. Possibly the level pipe can be eliminated if instead the pressure is sensed directly in the filler pipe.
  • the invention is intended to be used for packaging machines that work with a packaging web material, which is folded over to form a tube that is longitudinally sealed and filled with material through the filling pipe.
  • the longitudinal joint is produced by placing both the edges of the web material so that they overlap each other, whereafter heat is supplied to the overlapping area so that the plastic material with which the web is coated will melt and stick together, so that a welded tube is obtained.
  • the joint In order for the joint to be durable, however, it must be allowed to stabilize .itself for at least a short interval of time. It is obvious, therefore, that high stresses in the newly-formed tube must 'be avoided if possible. Thus the internal compressive stresses in the tube constitute a considerable risk factor that must be eliminated. It is therefore an additional object of the invention to eliminate the detrimental effect of the internal pressure amplification that occurs with the present level control method, and this can be obtained principally by a special design of the sealing member.
  • the invention is thus characterized in that a sealing member is fitted around the filler pipe in the form of a sleeve, which makes sealing contact with the inside of the movable tube and tightly encloses the filling pipe, by which means a closed space is obtained defined at the top by the said sleeve and at the bottom by the upper level of the filling material in the tube, whereby the volume of the space is determined by the level of filling material in the tube, i.e. the level that is intended to be controlled.
  • FIG. 1 is a schematic view of a packaging machine, to which it is intended to apply the principles of the invention
  • FIG. 2 shows, partly in section, a sealing element according to the invention
  • FIG. 3 shows in section a tube and its filling material together with a level-pressure diagram.
  • a packaging web material is designated 1 and is of the kind that, at least on the side that is intended to form the inside of the finished packages, has a surface of heat-scalable plastic.
  • the web material 1 is unwound from a supply roll, passes a guide roller and a folder, and is shaped with the aid of a tube forming element, not shown in more detail, into a tube 3.
  • the overlapping longitudinal edges are sealed to each other by means of a welding element 4, so that a longitudinal joint 2 is obtained.
  • the tube is pressed together at its lower part with the aid of transverse sealing jaws, which are not shown. When these jaws are heated, the compressed plastic surfaces will stick together and, in this way, a transverse seal 5 is obtained. If consecutive transverse seals 5' and 5 are made at right angles to each other, packages 6 of tetrahedral shape will be obtained.
  • the filling material which is assumed to consist of a viscous substance such as, for example, clotted milk, or yogurt, will rise in the tube to a filling material level N which it is required to maintain at a certain constant value.
  • the mouth of a level pipe 9 arranged inside the filler pipe 8 is essentially on a level with the lower end of the filler pipe.
  • the level pipe 9 is open at its lower end, so that it communicates with the tube 3.
  • the filling material will thereby rise in the level pipe to a level N which, as a result of a certain overpressure being maintained in the level pipe above the level N will be slightly below the level N in the tube 3.
  • a relay unit that is arranged, dependent on the pressure in the level pipe 9, to control a throttle valve 11 arranged in the filler pipe 8 or its supply line. It is also possible entirely to eliminate the level pipe if the pressure in the filler pipe is permitted, via a pressure sensing member, to control directly a throttling element, for example 3 a reducing diaphragm.
  • the pressure sensing member in this case may be an impulse diaphragm.
  • this member is intended to be designed for a projected embodiment is shown in more detail in FIG. 2.
  • the sealing member 12 which in FIG. 2 has been shown partly in section, has three principal parts, namely a neck portion 2% with a considerable wall thickness, an intermediate portion 21 with first a rather great but then diminishing wall thickness, and finally a flexible cylindrical portion 22 with a thin wall thickness.
  • the cylindrical portion 22 makes a sealing contact with the inside of the movable tube 3.
  • the neck portion 26 is pressed securely against the filling pipe 8 by means of a hose clip 23, so that sealing is obtained also here.
  • the sealing body 12 is suitably manufactured of a rather elastic material with a low friction value so that no harmful friction can occur against the thin plastic surface of the tube 3.
  • a suitable material for this purpose is the plastic substance polytetrafiuoroethylene, i.e.
  • the sealing sleeve may be given a shape that differs from that shown in the figure. Thus it is not essential that the part 2.2 is wholly cylindrical. Instead, it might be more advantageous to make it slightly enlarging downwards, so that it will press against the wall of the tube, whereby a good initial sealing may be obtained.
  • FIG. 3 a tube filled with filling material is shown schematically in cross section. If the tube is not fitted with a sleeve seal specific for the invention, the filling material will rise to a considerable height before the pressure in the level pipe 9 becomes sufiiciently high for it to react by reducing, via a throttling element, the supply of filling material through the filler pipe 8.
  • a particu lar disadvantage is also that the thick, viscous material in the peripheral parts of the tube is brought into motion downwards by the downward-moving package material, whilst the filling material in the central part of the tube, after a considerable rise in level, will be left suspended on the wall of the filler pipe. How the pressure p in the level pipe 9 depends on the filling material level 11, in the case when there is no sealing member in the tube, is shown by the upper curve in the diagram.
  • a means will be obtained of controlling the filling material level within considerably closer limits. If the filling material 3% rises in the tube 3, the volume of space 31 will be reduced with a consequent pressure amplification. Naturally this pressure will act on the upper surface of the filling material and force up the filling material in the level pipe 9, so that the pressure therein will increase. When the filling material is viscous, this factor is predominant for the creation of the pressure in the level pipe, since the pressure factor that is dependent on the difference in levels between the levels in tube and level pipe, defined liquid column, is appreciably reduced by the high viscosity of the filling material. The greater dependence of the pressure p on the filling material level, in the case when a closed space has been created above the filling material level with the aid of the sealing member 12-, is shown by the lower curve in the diagram.
  • the invention is not limited to the embodiment shown.
  • the throttling members in the filling pipe which according to the embodiment shown are controlled by the volume 31, could possibly be eliminated completely, and instead permit the pressure in the volume 31 to counteract by its force the pumping means that force down the filling material through the filler pipe, i.e. make the system fully self-controlling without exterior control members.
  • Other modifications are also conceivable, as well regarding the level controlling capacity of the sealing sleeve, as its abiiity of supporting the longitudinal joint.
  • apparatus for packaging viscous liquid materials which includes means for forming a continuous tubular container from a web of packaging material, means for forming a continuous longitudinal seam along the wall of said tubular container, a filler pipe disposed axially of said tubular container for introducing liquid material into said tubular container and means for forming separate compartments in said filled tubular container, the improvement comprising a bell-shaped sleeve member of resilient, flexible material secured in sealing relation about said filler pipe, the circumferential skirt of said sleeve member slidingly and sealingly engaging the inner wall of said tubular container to form a closed space defined by the inside of the sleeve member and the level of viscous liquid above the bottom edge of the skirt of the sleeve member and means responsive to the pressure in said closed space for controlling the rate of introduction of viscous liquid through said filler pipe.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)
US3470672D 1966-06-30 1967-06-05 Equipment for packaging machines comprising a sealing ring Expired - Lifetime US3470672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE892466A SE331448B (de) 1966-06-30 1966-06-30

Publications (1)

Publication Number Publication Date
US3470672A true US3470672A (en) 1969-10-07

Family

ID=20275377

Family Applications (1)

Application Number Title Priority Date Filing Date
US3470672D Expired - Lifetime US3470672A (en) 1966-06-30 1967-06-05 Equipment for packaging machines comprising a sealing ring

Country Status (7)

Country Link
US (1) US3470672A (de)
JP (1) JPS4825115B1 (de)
CH (1) CH476600A (de)
DE (1) DE1561950B1 (de)
GB (1) GB1168117A (de)
NL (1) NL160211C (de)
SE (1) SE331448B (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606174A (en) * 1984-03-08 1986-08-19 Tetra Pak International Ab Method and an arrangement for the manufacture of packing containers
US4617779A (en) * 1982-09-27 1986-10-21 Tetra Pak International Ab Method and an arrangement for the manufacture of packing containers
US4641486A (en) * 1984-07-31 1987-02-10 Tetra-Dev Co. Method and an arrangement for packing machines
US4809485A (en) * 1986-12-29 1989-03-07 Ab Tetra Pak Arrangement for the control of the flow of contents in a packing machine
US4829746A (en) * 1987-07-24 1989-05-16 Baxter Travenol Laboratories, Inc. Apparatus for placing a web of film under tension
US4924655A (en) * 1987-06-29 1990-05-15 Baxter Travenol Laboratories, Inc. Film guide system
US4986054A (en) * 1989-07-17 1991-01-22 Zip-Pak Incorporated Fill tube spreader
US5400565A (en) * 1992-06-29 1995-03-28 Pacmac, Inc. Vertical form, fill and seal packaging machine for making recloseable product filled bags
EP0882651A1 (de) * 1997-06-04 1998-12-09 Tetra Laval Holdings & Finance SA Füllrohr für Verpackungsmaschinen für flüssige Nahrungsmittel
US6691491B2 (en) 2000-08-18 2004-02-17 Pacmac, Inc. Vertical form, fill and seal packaging machine
CN100526162C (zh) * 2007-08-13 2009-08-12 山东泉林包装有限公司 用于液体包装设备的填充管
US20090297691A1 (en) * 2008-05-27 2009-12-03 S. I. Incorporated, Dba "Serv-Ice" Method of serving a drink to a person
US20090293434A1 (en) * 2008-05-27 2009-12-03 S. I. Incorporated, Dba "Serv-Ice" Method of forming a pre-packaged, flexible container of ice and air
US20090293536A1 (en) * 2008-05-27 2009-12-03 S. I. Incorporated, Dba "Serv-Ice" Pre-packaged, flexible container of ice and air
CN101905752A (zh) * 2010-09-02 2010-12-08 上海普丽盛轻工设备有限公司 液态食品包装机械上所用的高速填充管
US20120266571A1 (en) * 2009-12-18 2012-10-25 Tetra Laval Holdings & Finance S.A. Filling assembly, gasket for use in said filling assembly, and a method for filling liquid
CN103407601A (zh) * 2013-06-14 2013-11-27 武汉金牛经济发展有限公司 用于塑料管材的全自动包装机
US20160122051A1 (en) * 2013-06-04 2016-05-05 Tetra Laval Holdings & Finance S.A. Device and method in a filling machine
US11230399B2 (en) * 2018-10-10 2022-01-25 Jbt Food & Dairy Systems B.V. Stick filler pipe with integral sterilization

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178694B (en) * 1985-06-06 1990-01-31 Hiroshi Yamashiro Dunnage shock absorber and method and apparatus for making same
WO2010140242A1 (ja) * 2009-06-04 2010-12-09 大紀商事株式会社 抽出バッグの製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE511594A (de) * 1951-05-23

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1004095B (de) * 1951-05-23 1957-03-07 Hermorion Ltd Fluessigkeitsfuellanordnung zum Anfuellen von Verpackungen in Verbindung mit ihrer Herstellung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE511594A (de) * 1951-05-23

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617779A (en) * 1982-09-27 1986-10-21 Tetra Pak International Ab Method and an arrangement for the manufacture of packing containers
US4606174A (en) * 1984-03-08 1986-08-19 Tetra Pak International Ab Method and an arrangement for the manufacture of packing containers
US4641486A (en) * 1984-07-31 1987-02-10 Tetra-Dev Co. Method and an arrangement for packing machines
AU574488B2 (en) * 1984-07-31 1988-07-07 Tetra Dev-Co Packing machine
US4809485A (en) * 1986-12-29 1989-03-07 Ab Tetra Pak Arrangement for the control of the flow of contents in a packing machine
AU600065B2 (en) * 1986-12-29 1990-08-02 Ab Tetra Pak An arrangement for the control of the flow of contents in a packing machine
US4924655A (en) * 1987-06-29 1990-05-15 Baxter Travenol Laboratories, Inc. Film guide system
US4829746A (en) * 1987-07-24 1989-05-16 Baxter Travenol Laboratories, Inc. Apparatus for placing a web of film under tension
US4986054A (en) * 1989-07-17 1991-01-22 Zip-Pak Incorporated Fill tube spreader
US5400565A (en) * 1992-06-29 1995-03-28 Pacmac, Inc. Vertical form, fill and seal packaging machine for making recloseable product filled bags
EP0882651A1 (de) * 1997-06-04 1998-12-09 Tetra Laval Holdings & Finance SA Füllrohr für Verpackungsmaschinen für flüssige Nahrungsmittel
US6035614A (en) * 1997-06-04 2000-03-14 Tetra Laval Holdings & Finance S.A. Filling pipe for liquid food packaging machines
US6691491B2 (en) 2000-08-18 2004-02-17 Pacmac, Inc. Vertical form, fill and seal packaging machine
CN100526162C (zh) * 2007-08-13 2009-08-12 山东泉林包装有限公司 用于液体包装设备的填充管
US7900471B2 (en) 2008-05-27 2011-03-08 S. I. Incorporated Pre-packaged, flexible container of ice and air
US20090297691A1 (en) * 2008-05-27 2009-12-03 S. I. Incorporated, Dba "Serv-Ice" Method of serving a drink to a person
US20090293434A1 (en) * 2008-05-27 2009-12-03 S. I. Incorporated, Dba "Serv-Ice" Method of forming a pre-packaged, flexible container of ice and air
US20090293536A1 (en) * 2008-05-27 2009-12-03 S. I. Incorporated, Dba "Serv-Ice" Pre-packaged, flexible container of ice and air
US20120266571A1 (en) * 2009-12-18 2012-10-25 Tetra Laval Holdings & Finance S.A. Filling assembly, gasket for use in said filling assembly, and a method for filling liquid
US9238515B2 (en) * 2009-12-18 2016-01-19 Tetra Laval Holdings & Finance S.A. Filling assembly, gasket for use in said filling assembly, and a method for filling liquid
CN101905752A (zh) * 2010-09-02 2010-12-08 上海普丽盛轻工设备有限公司 液态食品包装机械上所用的高速填充管
US20160122051A1 (en) * 2013-06-04 2016-05-05 Tetra Laval Holdings & Finance S.A. Device and method in a filling machine
US10494125B2 (en) * 2013-06-04 2019-12-03 Tetra Laval Holdings & Finance S.A. Device and method in a filling machine
CN103407601A (zh) * 2013-06-14 2013-11-27 武汉金牛经济发展有限公司 用于塑料管材的全自动包装机
CN103407601B (zh) * 2013-06-14 2015-09-30 武汉金牛经济发展有限公司 用于塑料管材的全自动包装机
US11230399B2 (en) * 2018-10-10 2022-01-25 Jbt Food & Dairy Systems B.V. Stick filler pipe with integral sterilization

Also Published As

Publication number Publication date
SE331448B (de) 1970-12-21
CH476600A (de) 1969-08-15
NL6708150A (de) 1968-01-02
GB1168117A (en) 1969-10-22
JPS4825115B1 (de) 1973-07-26
DE1561950B1 (de) 1970-06-18
NL160211C (nl) 1979-10-15
NL160211B (nl) 1979-05-15

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