US3406892A - Container closure - Google Patents

Container closure Download PDF

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Publication number
US3406892A
US3406892A US535241A US53524166A US3406892A US 3406892 A US3406892 A US 3406892A US 535241 A US535241 A US 535241A US 53524166 A US53524166 A US 53524166A US 3406892 A US3406892 A US 3406892A
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US
United States
Prior art keywords
panels
closure
panel
container
score line
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
US535241A
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English (en)
Inventor
Harry B Egleston
James J Feliks
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.)
Ex-Cell-O Corp
Original Assignee
Ex-Cell-O Corp
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 Ex-Cell-O Corp filed Critical Ex-Cell-O Corp
Priority to US535241A priority Critical patent/US3406892A/en
Priority to NO166577A priority patent/NO125310B/no
Priority to GB5038/67A priority patent/GB1109773A/en
Priority to BE693687D priority patent/BE693687A/xx
Priority to FI670449A priority patent/FI47069C/fi
Priority to DE19671586599 priority patent/DE1586599C/de
Priority to SE03301/67A priority patent/SE335502B/xx
Priority to NL6703866A priority patent/NL6703866A/xx
Priority to FR99053A priority patent/FR1514730A/fr
Application granted granted Critical
Publication of US3406892A publication Critical patent/US3406892A/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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/0281—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body the tubular body presenting double or multiple walls
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S229/00—Envelopes, wrappers, and paperboard boxes
    • Y10S229/941—Box having joint structure for preventing leakage

Definitions

  • plastic coated containers of the above described type have been commercially successful, there are certain disadvantages in their use, one of the most serious of which involves the exposure of certain of the raw or cut edges of the blank, when formed into a container, to the product. The result is that a liquid product penetrates by a wicking action into the exposed paperboard, with a resultant weakening of the board and eventually failure of the container.
  • Another disadvantage of the present plastic coated container results from the effect of continuous vibration during extended transportation, which can cause a failure of the container bottom by the thin plastic coating developing fatigue cracks.
  • various cost increasing measures such the employment of foil or other intermediate barrier layers, and blocking or coating the exposed raw edges, are required to insure a fluid-tight transportable container having substantial shelf life.
  • thermoplastic sheet material that can be effectively heatsealed.
  • a further object of the invention is to provide a new and improved liquid-proof container bottom closure formed of thermoplastic sheet material which will be strong, simple to erect, close and seal, and susceptible of high volume economical machine production for packaging liquid products.
  • Still another object is the provision of a novel container bottom closure construction having its fold-in panels so designed that they can be automatically closed and heat-sealed wherein the flow pattern of Weld material is confined within the peripheral limits of the container.
  • a still further object of the invention is the provision of a container bottom closure construction wherein no more than two surfaces are required to he heat-sealed together at any one location to attain a liquid-tight seal.
  • Another object of this invention is the provision of a fold-in container bottom closure construction having a minimum of material.
  • FIG. 1 is a layout view of a portion of a container blank from which the closure of the instant invention is formed showing the outside surface thereof.
  • FIG. 1A is an enlarged view of the portion of FIG. 1 within the dashed circle.
  • FIG. 2 is a perspective view of container showing the bottom end the blank of FIG. 1.
  • FIG. 3 is a plan view of the container bottom of FIG. 2.
  • FIG. 3A is an enlarged cross section taken on the line 3A3A of FIG. 3.
  • FIGS. 4, 5 and 6 are fragmentary perspective views illustrating, sequentially, various steps in forming the bottom closure of the container of FIG. 2.
  • FIG. 7 is a plan view of the closure as viewed in FIG. 6.
  • FIG. 2 generally indicates a thermoplastic container C having a bottom closure made in accordance with the principle of the present invention.
  • the container described in this application is made from high density polyethylene, but it should be understood that other suitable thermoplasic sheet material, such as polyvinyl chloride, polyvinyl acetate, vinyl copolymers, polypropylene, polystyrene, cellulose acetate and cellulose acetate butyrate may be employed without departing from the spirit and scope of the invention.
  • the container bottom is shown as a fragmentary blank 10 with a pattern of appropriate score lines and having the outside surface of the blank showing.
  • the bottom closure layout of FIG. 1 is adapted to be erected into the completed container closure of FIG. 2.
  • the container C includes a tubular body 11, which in the present instance is of substantially square cross-section.
  • One end of the body 11 is provided with a suitable top closure 12 which may, for example, be of the familiar gable top end closure as disclosed in copending application of Harry B. Egleston, Ser. No. 534,257 filed Ian. 6, 1966, the details of which are of no concern here.
  • the flat bottom closure 13 is shaped from the blank of FIG. 1, which is separated into two groups of panels by a staggered score line generally indicated at 14.
  • the material above score line 14 is the bottom closure group, While the portion below the score line 14 is the body group and comprises four panels 15-18.
  • the body group is defined with the panels being separated by score lines 1923.
  • each of the side seam panels 24, 25 extend longitudinally the entire height of blank 10 in the same manner as a conventional side seam flap as shown, for example, in the copending [application of Elwyn R. Gooding, Ser. No. 474,869, filed July 26, 1965, now Patent No. 3,334,802.
  • the container C is formed by first being side seamed. This can be accomplished by having panels 15 and 16, and flap 24, folded about score line 21 until their inside surfaces contact the inside surfaces of panels 18, 17 land flap 25 respectively.
  • the coincident side edges formed by scores 19 and 23 of the panels 15 and 18 can be simultaneously cut from their associated flaps 24 and 25 and heat-sealed by the use of a hot knife or radiant hot wire to form a side seam.
  • the blank 10 is then opened into tubular form, substantially square in cross section as seen in FIG. 4. I
  • bottom closure is preferably formed from a blank that has been edge-sealed without any overan inverted gable top closure erected from 0. lap
  • other arrangements such as a form of the conventional side seam flap utilized, for example, in plastic coated cartons of the type shown in U.S. Patent 3,120,335, could be used and still embody the principles of the invention.
  • the alternate side panels 16, 18 have respectively connected therewith substantially trapezoidal shaped major extension panels 26, 27. These major panels are joined along their larger bases at individual score lines 30, 31 to their respective side panels 16, 18. Each of the trapezoidal extension panels 26, 27 is flanked at its sides along respective angular score lines 32, 33 and 34, 35 by a plurality of triangular corner rib panels 36, 37 and 38, 39.
  • the alternate side panels 15, 17 have respectively connected therewith substantially trapezoidal shaped minor extension panels 28, 29. These minor extension panels are joined along their larger bases by individual score lines 40, 41 to their respective side panels 15, 17. Each of the trapezoidal minor panels is flanked on its sides along respective pairs of angular score lines 42, 43 and 44, 45 by trapezium shaped panels 46, 47 and 48, 49.
  • the triangular panel 36 and the trapezium panel 47 are hinged together along score line the panels 37, 48 are hinged together along score line 21, while the panels 38, 49 are hinged together along score line 22.
  • the panels 39, 46 are hinged together along the previously discussed side seams generally referred to as thermo-fused joint 57, as viewed in FIGURE 4, formed at the juncture of the blank scores 19 and 23. It will be noted in FIG. 1 that the extension of the scores 20, 21 and 22 to the upper edge of the blank 10 is accomplished for the convenience of forming the tube of FIG. 4 on a machine mandrel, and they are not utilized during the fold-in sequence shown in FIGS. 5 and 6. p
  • the angular score lines 32, 33, 34 are disposed relative to the longitudinal scores 20, 21, 22, 23 respectively, the angle being delineated by the letter A in FIG. 1A for the score 34.
  • the angle A is approximately 22 /2 and its complementary angle of 67 /2 is shown at D.
  • the score line 34 intersects the horizontal score 31 substantially at its juncture with the vertical score line 22.
  • the score lines 42, 43, 44 are angularly disposed relative to longitudinal scores 19, 20, 21, 22 respectively, the angle being delineated by the letter A.
  • the angle A is again approximately 22 /2 so that the sum of angles A and A, represented by the letter B, is 45".
  • the horizontal score line 41 intersects the score line 45 substantially at its juncture with the vertical score line 22.
  • the vertical offset between individual staggered scores 31 and 41 will vary, depending upon the thickness of the sheet plastic used for various size containers. For example, applicants one-half pint container, using a sheet material of approximately 15 mils, will provide an offset within the range of & inch.
  • the purpose of this staggered scoring is to accommodate the thickness of the plastic as it is formed along the score lines when the container is erected, and thus prevent crowding of the plastic at the various corner junctions of the score lines.
  • the panels 26, 27 are mirror images of each other and have corresponding pairs of free edges 50 and 52 which are angularly disposed relative to the vertical, the angle being approximately 45 and indicated at E in FIG. 1. It will be noted that the pairs of edges 50 and 52 intersect the horizontal free edges 53 of blank 10 at points such that their length, represented by the Letter Z, is less than the width of the body panels 15-18 indicated generally by the dimension W.
  • the portions 53' of each edge 53 are equal in length and form the fourth leg 46, 47, 48, 49 of the trapezium fold-back panels of the completed closure 13.
  • the minor panels 28, 29 are similarly mirror images of each other and have a height dimension represented at X which is approximately one-quarter the panel dimension W.
  • major panels 26, 27 are cut and scored essentially in a trapezoidal configuration.
  • the major panel 26 has an extended tuck-in flap S4 and major panel 27 has an extended overlying or outside overlap flap 55.
  • the end portions of the flaps 54, 55 are relieved or chamfered at 56 for ease of infolding. While the angle of chamfer is shown as being 45 to agree with the angle E of edge pairs 50 and 52, it will be observed that the flap edges could be formed at various angles.
  • the panel edges 19 and 23 are joined together along the thermofused joint 57 in a manner such as described above and erected into a tube of substantially square cross section (FIG. 4).
  • the manner in which the bottom panels close the container is shown in FIGS. 5 and.6.
  • the major panels 26, 27 are folded inward toward each other.
  • the folding occurs at the lateral scores 30, 31 and the folding scores 32, 33, 34 and 35.
  • the minor panels 28, 29 are moved towards each other.
  • This causes the generally trapezium shaped foldback member (bounded by the scores 45, 34 and the free edges 52 and 53) constituting the individual panel members 38, 49 to rotate around score line 45 so that the inside surfaces of member 38, 49 and panel 29 are brought together.
  • FIG. 6 shows the bottom when completely closed preparatory to being heat sealed.
  • FIG. 7 indicates the substantially parallel relationship between free edges 50, 52 and their associated minor panel edge 53, which is offset therefrom by an amount indicated by the letter F.
  • the end of minor panel 29 is fused to the outer surface of major panels 26, 27 by heat seal 58; the ends of panels 38, 49 and 37, 48 are fused to the inner surface of panel 29 by heat seals 59 and 60, respectively, and the free edges of the flaps 54, 55 are fused to the inner and outer surfaces of the panels 27 and 26 by heat seals 61 and 62 respectively, thus forming a liquidtight closure.
  • the heat seal pattern FIG.
  • an advantage of applicants closure design is that the overlying panels may be heat-pressure sealed by a heating element or die having a generally I-I-shaped design corresponding generally to the outline shape of the zone 63 in FIG. 3.
  • a controlled zone of heat can be applied, together with pressure to cause the plastic material to flow in the regions of zone 63.
  • the ability of applicants to attain a sound weld results from the closure design which requires only the outer two layers of sheet material depth to be welded together at any single location.
  • a constant heat amount can be transmitted to the entire zone 63 for simultaneously thermofusing all of applicants closure lapseals, such that all the seals have approximately the same shear strength.
  • the foldin closure 13 is not only formed using a minimal amount of material, but the heat zone 63 insures that there will be no objectional overhang of fused mate rial after the heat sealing operation.
  • An example of sizes and dimensions that could be used would be a liquid half-pint container having a width of panel 16, the distance from the middle of score line 20 to the middle of score line 21, of 2.764 inches and all other panels 15, 17 and 18' equal to panel 16.
  • the distances from the middle of score line 30 to the edge 51 being 1.500 inches and the distance from the middle of score line 40 to the edge 53 being .688 inch.
  • the height of the panels 16 and 18 being 1.875 inches, while the height of panels 15 and 17 will be .062 of an inch greater due to the equal offsets of .031 of an inch of their horizontal scores at each end.
  • the container closure of this invention may be also used with polymeric material in the form of a seamless tube, as well as two separate sheets having, for example, two thermofused joints coextensive with opposite corners such as 21 and 57 of FIG. 4.
  • a bottom end closure for a tubular container made from thermoplastic sheet material having,
  • said bottom end closure having first and second major panels extending from two opposed side walls
  • each of said triangular corner rib panels is connected to one of said trapezium panels
  • said triangular corner rib panels and said connected trapezium panels form a co-planar surface positioned between the major and minor panels and the edges of the co-planar surfaces are positioned a predetermined distance from the end edge of said minor panels
  • first and second heat seals are placed along the ends of said major panel welding its end to the other major panel
  • said major panels are provided with a pair of substantially straight angular second score lines formwall said minor panel ing substantially at side edges of said side walls and extending inwardly,
  • said third score lines are substantially perpendicular to said first score line
  • one of said third score lines and one of said angular second score lines on said major panels form one of said triangular corner rib panels with the free edge of said bottom end closure
  • said minor panels are provided with a pair of substantially straight fourth angular minor panel score lines forming acute angles with said first score line and starting substantially at side edges of said side walls and extending inwardly,
  • one of said third score lines and one of said fourth angular minor panel score lines form one of said trapezium panels on said minor panels with the free edge of said bottom end closure
  • one of said connected trapezium panels and one of said triangular corner rib panels acting with a common third side score lines form one of said of said co-planar surfaces.
  • thermoplastic 0 material comprising:
  • each of said triangular corner rib panels having one side formed by one side of a major panel, a second side formed by one of said panel score lines, and a third side by a free edge,
  • Each of said trapezium panels having one said formed by one side of minor panel, a second side formed by a wall panel score line, a third side in alignment with the free edge of the adjacent triangular corner rib panel, and a fourth side in alignment with the free edge of its adjacent minor panel,
  • said free edge of a minor panel is substantially parallel to said first score line and is a distance from it less than one half the width of its adjacent wall panel
  • said free edges of said major panels are substantially parallel to said first score line and at least one is a distance from it equally more than one half the width of its adjacent wall panel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Closing Of Containers (AREA)
  • Laminated Bodies (AREA)
US535241A 1966-03-17 1966-03-17 Container closure Expired - Lifetime US3406892A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US535241A US3406892A (en) 1966-03-17 1966-03-17 Container closure
NO166577A NO125310B (nl) 1966-03-17 1967-01-26
GB5038/67A GB1109773A (en) 1966-03-17 1967-02-02 Container closure
BE693687D BE693687A (nl) 1966-03-17 1967-02-06
FI670449A FI47069C (fi) 1966-03-17 1967-02-15 Nestetiivis pohjansuljin säiliötä varten.
DE19671586599 DE1586599C (de) 1966-03-17 1967-02-16 Aus einem heißsiegelfähigen Zu schnitt hergestellter Behalter
SE03301/67A SE335502B (nl) 1966-03-17 1967-03-09
NL6703866A NL6703866A (nl) 1966-03-17 1967-03-14
FR99053A FR1514730A (fr) 1966-03-17 1967-03-16 Fermeture pliée pour récipient tubulaire, récipient comportant cette fermeture etflan servant à la production de ce récipient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US535241A US3406892A (en) 1966-03-17 1966-03-17 Container closure

Publications (1)

Publication Number Publication Date
US3406892A true US3406892A (en) 1968-10-22

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ID=24133403

Family Applications (1)

Application Number Title Priority Date Filing Date
US535241A Expired - Lifetime US3406892A (en) 1966-03-17 1966-03-17 Container closure

Country Status (8)

Country Link
US (1) US3406892A (nl)
BE (1) BE693687A (nl)
FI (1) FI47069C (nl)
FR (1) FR1514730A (nl)
GB (1) GB1109773A (nl)
NL (1) NL6703866A (nl)
NO (1) NO125310B (nl)
SE (1) SE335502B (nl)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462067A (en) * 1968-07-25 1969-08-19 Diamond Shamrock Corp Self-supporting plastic container
FR2359035A1 (fr) * 1976-07-20 1978-02-17 Sanyo Kokusaku Pulp Co Emballage en carton pour produits liquides
US4341340A (en) * 1980-09-16 1982-07-27 Ex-Cell-O Corporation Container with infolded bottom closure
FR2503094A1 (fr) * 1981-04-01 1982-10-08 Linnich Papier & Kunststoff Emballage pour liquides forme par pliage d'un flan de carton
US5482204A (en) * 1994-03-21 1996-01-09 International Paper Company Carton bottom sealer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2358124A (en) * 1942-01-15 1944-09-12 Jr Julius A Zinn Carton
US2581237A (en) * 1946-09-27 1952-01-01 Ex Cell O Corp Dispensing container
US2596225A (en) * 1946-05-23 1952-05-13 Ex Cell O Corp Container
US3029997A (en) * 1960-01-25 1962-04-17 Foils Packaging Corp Container and end closure
US3035750A (en) * 1960-02-15 1962-05-22 Foils Packaging Corp Closed-end containers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2358124A (en) * 1942-01-15 1944-09-12 Jr Julius A Zinn Carton
US2596225A (en) * 1946-05-23 1952-05-13 Ex Cell O Corp Container
US2581237A (en) * 1946-09-27 1952-01-01 Ex Cell O Corp Dispensing container
US3029997A (en) * 1960-01-25 1962-04-17 Foils Packaging Corp Container and end closure
US3035750A (en) * 1960-02-15 1962-05-22 Foils Packaging Corp Closed-end containers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462067A (en) * 1968-07-25 1969-08-19 Diamond Shamrock Corp Self-supporting plastic container
FR2359035A1 (fr) * 1976-07-20 1978-02-17 Sanyo Kokusaku Pulp Co Emballage en carton pour produits liquides
US4341340A (en) * 1980-09-16 1982-07-27 Ex-Cell-O Corporation Container with infolded bottom closure
FR2503094A1 (fr) * 1981-04-01 1982-10-08 Linnich Papier & Kunststoff Emballage pour liquides forme par pliage d'un flan de carton
US5482204A (en) * 1994-03-21 1996-01-09 International Paper Company Carton bottom sealer
US5588943A (en) * 1994-03-21 1996-12-31 International Paper Company Carton bottom sealing dies
US5683339A (en) * 1994-03-21 1997-11-04 Int Paper Co Container fabrication method

Also Published As

Publication number Publication date
GB1109773A (en) 1968-04-18
BE693687A (nl) 1967-07-17
FR1514730A (fr) 1968-02-23
FI47069B (nl) 1973-05-31
NO125310B (nl) 1972-08-21
SE335502B (nl) 1971-05-24
DE1586599A1 (de) 1970-08-20
NL6703866A (nl) 1967-09-18
FI47069C (fi) 1973-09-10

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