US3701455A - Can for liquids and process for closing same - Google Patents

Can for liquids and process for closing same Download PDF

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Publication number
US3701455A
US3701455A US79955A US3701455DA US3701455A US 3701455 A US3701455 A US 3701455A US 79955 A US79955 A US 79955A US 3701455D A US3701455D A US 3701455DA US 3701455 A US3701455 A US 3701455A
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US
United States
Prior art keywords
body portion
wall thickness
cylindrical body
central opening
annular section
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
Application number
US79955A
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English (en)
Inventor
Herbert Warnecke
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.)
TUWA-PLASTIK DR HERBERT WARNECKE ERZEUGUNG VON KUNSTSTOFFARTIKELN
WARNECKE TUWA PLASTIK
Original Assignee
WARNECKE TUWA PLASTIK
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
Priority claimed from AT983669A external-priority patent/AT300644B/de
Priority claimed from AT354170A external-priority patent/AT324202B/de
Application filed by WARNECKE TUWA PLASTIK filed Critical WARNECKE TUWA PLASTIK
Application granted granted Critical
Publication of US3701455A publication Critical patent/US3701455A/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
    • B65D—CONTAINERS 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
    • B65D1/00—Rigid or semi-rigid containers 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 or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical

Definitions

  • the can of the invention is intended for containing liquids, such wells, is made of a plastic material, and is substantially circular in cross section
  • the top end wall is provided with a central opening having a reinforced rim and is adapted to be closed with a heat sealing foil.
  • An elevated border at the outer circumference of the top end wall concentrically surrounds the rim and is connected with said rim by a wall portion having the shape of a flat cone.
  • the present invention refers to a can for liquids, particularly for lubricant oils, consisting of plastics material, preferably of thermoplastics such as polyethylene or polypropylene.
  • the invention essentially refers to a can with a volume of maximally two liters, asize which is usual for cans for lubricant oils.
  • the invention essentially consists inthe factthat the can has a cylindrical jacket of approximately circular cross-section and is provided at its top front face with a central opening provided with a reinforced .rim and having a diameter smaller than the diameter of the can, preferably adiameter approximately corresponding to one-third of the can diameter, and being adapted to be closed by a film applied to the opening by heat sealing, in the fact that the top front face of the can has an elevated border surrounding the reinforced rim of the opening and being connected to saidreinforced rim by a wall portion having the shape of a flat cone, and inthe fact that the wall-thickness of the jacket amounts to 0.1 -0.5 mm, preferably to about 0.35 mm.
  • a can according to the present invention is preferably manufactured by expanding a hose by internal pressure whereby the low wall thickness of the can is achieved.
  • a can according to the present invention may, in view of its typical shape, have a low wall thickness.
  • the jacket of the inventive can By giving the jacket of the inventive can an approximately circular cross-section, the jacket is supported by the contents of the can.
  • load which, when actingon an empty can, would .resultin a deformation of the can jacket, is equally distributed to .the content of .a can filled with some liquid and thus will act in a sense to maintain the shape of the jacket.
  • the can jacket has a cross-section of only approximate circular cross-section.
  • the jacket has a polygonal cross-section which approximates a circular cross-section.
  • the elevated border surrounding the reinforced rim of the central opening contributes to further strengthening of the can and the reinforced rim of the central opening contributes to further strengthening the top front face of the can.
  • the reinforced rim of the central opening can be positioned in approximately the same plane as the elevated border of the can.
  • the reinforced rim of the central opening By giving the central opening and, in consequence, the reinforced rim of the central opening an essentially smaller diameter than the diameter of the can, preferably a diameter corresponding to one-third of the can diameter, a strengthening effect for the top front face of the can is provided by the reinforced rim, and furtheron weakening of the can, which would occur if the opening were givena greater diameter, is avoided.
  • Oil cans of known construction which are provided with essentially plane front faces, are opened by perforating one front face with a pointed object, for instance a screw driver, at two locations so that the oil can run out from one perforation and air can enter the can through the other perforation. Since, as already mentioned, the liquid can contents provide for a strengthening effect on the can jacket when subjecting the front face of the can to a load, there would result rises from the border of the can in direction to the reinforcedrim in form of a flat cone.
  • a pointed object for instance a screw driver
  • the die of the heat sealing equipment When closing the can by a heat sealing foil, the die of the heat sealing equipment is heating the reinforced rim of the opening and, at least partially, also the wall portion adjacent the reinforced rim, said wall portion having the shapeof a fiat cone.
  • the pressure exerted by the die is absorbed by the can contents, however, the top front face of the can is thereby yielding such that the annular portion and/or, respectively, the conically shaped portion of the top front face'is pressed downwardly and assumes when having the shape of a convex cone, either an approximately horizontal position or even the form of a flat convex cone.
  • the reinforced rim in some cases also the'annular portion of the topfront face,-is heated to plastic condition.
  • said wall portion will, after termination of the heat sealing process, maintain its deformed shape because the front face freezes in its position assumed after having been pressed downwards by said die.
  • the can contents is therewith subjected to pressure such that the can jacket is under tension even if, with time elapsing, a small amount of the can contents emerges from the can by diffusion. With this, it is avoided that the can becomes unattractive with time elapsing.
  • the annular wall portion or, respectively, the conical wall portion adjacent the reinforced rim of the opening twice, preferably three times the wall thickness of the can jacket.
  • the wall thickness of the annular portion of the top front face is greater adjacent the reinforced rim than at its outer peripheral portions and is, for instance, decreasing indirection to the periphery like a wedge.
  • a preferred method for closing a can of the kind described, with a heat sealing foil essentially consists, according to the invention, in the fact that the reinforced rim surrounding the central opening and to be closed by a heat sealing foil, and if desired the annular and, respectively, conical portion of the front face of the can, is heated by the heat sealing die, to a temperature within the softening range of the material and is inwardly pressed by said heat sealing die to a position in which it is chilled such that the can contents is subjected to pressure.
  • the invention thus provides a can and, respectively, an oil can which, in filled condition, without further resists the stresses occurring on transport. It has even been experienced that by giving the can jacket a small wall-thickness the load resistance of a filled can is increased in view of the fact that the can jacket, which has the shape of a thin and flexible foil, is not subjected to the danger. of breakage on deformation, which danger would be present with cans having a thickwalled can jacket.
  • FIGS. 1,2 and 3 an oil can is shown schematically.
  • FIGJI is a cross section along line I I of FIG. 2.
  • FIG. 2 is a top plan-view of FIG. 1.
  • FIG. 3 is a section along line III-III of FIG. 2.
  • FIGS. 4 to 8 show a modified embodiment of an oil can according to the invention.
  • FIG. 4 illustrates the can in an axial section along line IV IV of FIG. 5 prior to filling.
  • FIG. 5 is a top plan-view of the can shown in FIG. 4.
  • FIG. 6 is a bottom view of the can shown in FIG. 4.
  • FIG. 7 shows, in a section similar to that of FIG. 4, the filled can closed with a heat sealing foil.
  • FIG. 8 shows a detail of a can as seen in direction of arrow VIII of FIG. 5.
  • the can shown in FIGS. 1,2 and 3 is cylindrical in shape and is provided at its top front face 2 with an opening 4 reinforced by a rim 3 and to be closed,after filling of the can,with a heat sealing foil.
  • the opening 4 is centrally arranged at the top front face 2.
  • an elevated border 5 is provided which is interrupted by depressions 6 lying between edges 8 diverging in direction to axis 7 of the can. These depressions 6 act as beaks by which the oil emerging from the opening 4 is collected to a suitable jet. These depressions 6 simultaneously give a stiffening effect for the elevated border 5.
  • the can is manufactured by blowing the desired material into a mold bipartited along axis 7 of the can.
  • the elevated border 5 forms a so-called recessed portion which engages the concave cone surface 9 and would be caught by the mold halves when opening the mold.
  • a convex, annular cone surface 11 is provided at bottom 10 of the mold, which in a top plan-view, essentially coincides with the concave cone surface 9 at the top front face of the can and encloses with the axis of the can an angle alpha which is approximately equal to or smaller than the angle beta enclosed by the concave cone surface 9 and the axis 7 of the can.
  • the bottom 10 of the can is inwardly vaulted so that the cans may be stacked.
  • the cone portions 9 and 11 engage one another, thus securing a reliable stack.
  • the taper ll of the bottom has the shape of a convex cone and may be provided with a number of noses (not shown) corresponding to the number of depressions 6 forming beaks and having a distance from one another,corresponding to the distance of depressions 6.
  • the noses provided at the bottom of a can are engaging the depressions 6 of the next lower can, which is of advantage when stacking labelled cans which need alignment of the labels in the stack.
  • 1 represents the can jacket, 12 the elevated border provided at the top front face of the can and being transient to the can jacket, 3 the reinforced rim of the opening to be closed by the heat sealing foil, and 2 the annular portion of the top front face which, in this case, directly connects the reinforced rim 3, to the elevated border 12.
  • the bottom 15 is, again, provided with an edge 13 formed by a convex cone surface 11 and a concave cone surface 14.
  • the depression 19 only serves for aligning the can in the printing apparatus.
  • the wall thickness of the can jacket 1 again amounts to approximately 0.1 0.5 mm and conveniently amounts approximately to 0.35 mm. Such a wall thickness is too small to resist the pressure exerted when pressing the heat sealing foil onto the reinforced rim and so small that the can would become depressed and assume an unpleasant aspect on partial diffusion of the can contents.
  • the reinforced rim is given a completely plane surface at its upper side.When applying the heat sealing foil, an air tight seal is thereby achieved at the very first moment.
  • the top front face 3,2 of the can is therefore pressed into position 3',2' shown in FIG. 7.
  • the wall thickness of the annular portion 2 is at least twice the wall thickness of the can jacket 1, conveniently at least three times the wall thickness of the can jacket This favors position 3,2' as fixed position.
  • the arrangement is such that the wall thickness of the annular portion 2 is a maximum in the area of the reinforced rim 3 and is steadily decreasing in direction of the outer edge 12. This provides an accumulation of material in the area of the reinforced rim 3, which further contributes to fixing the portions 3,2 in position 3',2 shown in FIG. 7.
  • the elevated border 12 has a semi-circular crosssection and thus is in the position to provide the necessary abutment for deformation of the annular portion 2 which is not or nearly not heated in the area of the elevated border 12.
  • teats are provided at two diametrally opposed positions. These teats have a greater height that the wall thickness of the can at the respective position, so that when cutting off these teats a cavity is cut open and a pouring opening as well as an air-admitting opening is provided.
  • a torus I8 is provided which surrounds the corresponding teat.
  • a can for a liquid medium, oil comprising a. a substantially cylindrical body portion of a thermoplastic material selected from the group consisting of polyethylene and polypropylene and having a wall thickness of 0.0039 to 0.0197 inches,
  • an annular portion of said top member surrounding said central opening comprising an inner annular section extending outwardly and downwardly from said reinforcement rim and merging with an outer annular section which is inclined outwardly and upwardly toward the top of said cylindrical body portion.
  • a can for a liquid medium, particularly lubricating oil comprising a. a substantially cylindrical body portion of a thermoplastic material selected from the group consistin g of polyethylene and polypropylene and having a wall thickness of 0.0039 to 0.0197 inches,
  • an annular portion of said top member surrounding said central opening comprising an inner annular section extending outwardly and downwardly from said reinforcement rim and merging with an outer annular section which is inclined outwardly and upwardly toward the top of said cylindrical body portion, the wall thickness of said inner annular section of the top member being greater than the wall thickness of said cylindrical body portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Sealing Material Composition (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US79955A 1969-10-17 1970-10-12 Can for liquids and process for closing same Expired - Lifetime US3701455A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT983669A AT300644B (de) 1969-10-17 1969-10-17 Dose für Flüssigkeiten, insbesondere Motoröle, aus thermoplastischem Kunststoff
AT354170A AT324202B (de) 1970-04-20 1970-04-20 Dose für flüssigkeiten und verfahren zum verschliessen derselben

Publications (1)

Publication Number Publication Date
US3701455A true US3701455A (en) 1972-10-31

Family

ID=25600165

Family Applications (1)

Application Number Title Priority Date Filing Date
US79955A Expired - Lifetime US3701455A (en) 1969-10-17 1970-10-12 Can for liquids and process for closing same

Country Status (8)

Country Link
US (1) US3701455A (enrdf_load_stackoverflow)
JP (1) JPS5035474B1 (enrdf_load_stackoverflow)
DE (1) DE2049203A1 (enrdf_load_stackoverflow)
ES (1) ES177295Y (enrdf_load_stackoverflow)
FR (1) FR2064407B1 (enrdf_load_stackoverflow)
GB (1) GB1316297A (enrdf_load_stackoverflow)
IL (1) IL35470A (enrdf_load_stackoverflow)
NL (1) NL7015007A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904069A (en) * 1972-01-31 1975-09-09 American Can Co Container
US4134510A (en) * 1975-06-16 1979-01-16 Owens-Illinois, Inc. Bottle having ribbed bottom
US4151927A (en) * 1974-07-12 1979-05-01 Reynolds Metals Company Container construction
US4222494A (en) * 1977-03-04 1980-09-16 Reynolds Metals Company Container
US4386701A (en) * 1973-07-26 1983-06-07 United States Steel Corporation Tight head pail construction
US4515284A (en) * 1980-08-21 1985-05-07 Reynolds Metals Company Can body bottom configuration
US4700842A (en) * 1981-09-03 1987-10-20 Dart Industries, Inc. Stackable storage container
US4759104A (en) * 1986-08-22 1988-07-26 Buerosse William B Body case
US4759105A (en) * 1986-08-22 1988-07-26 Buerosse William B Body case with viewing window
US5217737A (en) * 1991-05-20 1993-06-08 Abbott Laboratories Plastic containers capable of surviving sterilization
US5222643A (en) * 1991-08-05 1993-06-29 Platt Vanjanette C Hair treatment servicing container
US5234126A (en) * 1991-01-04 1993-08-10 Abbott Laboratories Plastic container
US5984133A (en) * 1997-03-10 1999-11-16 Schutz-Werke Gmbh & Co. Kg Tighthead barrel
WO2001054983A1 (en) * 2000-01-27 2001-08-02 Diamond George B Apparatus having a guard for preventing splashing
US6286705B1 (en) * 1997-03-03 2001-09-11 Abbott Laboratories Container having tapered sidewall made from sheet material and lid to seal same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62502457A (ja) * 1985-04-16 1987-09-24 ウイルト・ヘ−ルブルッグ・アクチエンゲゼルシヤフト 隆起プロフイルを備えた合成樹脂容器及びその製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL297028A (enrdf_load_stackoverflow) * 1963-08-23

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904069A (en) * 1972-01-31 1975-09-09 American Can Co Container
US4386701A (en) * 1973-07-26 1983-06-07 United States Steel Corporation Tight head pail construction
US4151927A (en) * 1974-07-12 1979-05-01 Reynolds Metals Company Container construction
US4134510A (en) * 1975-06-16 1979-01-16 Owens-Illinois, Inc. Bottle having ribbed bottom
US4222494A (en) * 1977-03-04 1980-09-16 Reynolds Metals Company Container
US4515284A (en) * 1980-08-21 1985-05-07 Reynolds Metals Company Can body bottom configuration
US4700842A (en) * 1981-09-03 1987-10-20 Dart Industries, Inc. Stackable storage container
US4759104A (en) * 1986-08-22 1988-07-26 Buerosse William B Body case
US4759105A (en) * 1986-08-22 1988-07-26 Buerosse William B Body case with viewing window
US5234126A (en) * 1991-01-04 1993-08-10 Abbott Laboratories Plastic container
US5217737A (en) * 1991-05-20 1993-06-08 Abbott Laboratories Plastic containers capable of surviving sterilization
US5222643A (en) * 1991-08-05 1993-06-29 Platt Vanjanette C Hair treatment servicing container
US6286705B1 (en) * 1997-03-03 2001-09-11 Abbott Laboratories Container having tapered sidewall made from sheet material and lid to seal same
US5984133A (en) * 1997-03-10 1999-11-16 Schutz-Werke Gmbh & Co. Kg Tighthead barrel
WO2001054983A1 (en) * 2000-01-27 2001-08-02 Diamond George B Apparatus having a guard for preventing splashing

Also Published As

Publication number Publication date
FR2064407A1 (enrdf_load_stackoverflow) 1971-07-23
ES177295Y (es) 1973-05-01
GB1316297A (en) 1973-05-09
JPS5035474B1 (enrdf_load_stackoverflow) 1975-11-17
DE2049203A1 (de) 1971-04-29
FR2064407B1 (enrdf_load_stackoverflow) 1974-03-22
IL35470A (en) 1974-07-31
ES177295U (es) 1972-10-16
IL35470A0 (en) 1970-12-24
NL7015007A (enrdf_load_stackoverflow) 1971-04-20

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