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Publication numberUS3604613 A
Publication typeGrant
Publication dateSep 14, 1971
Filing dateJun 25, 1969
Priority dateJun 25, 1969
Publication numberUS 3604613 A, US 3604613A, US-A-3604613, US3604613 A, US3604613A
InventorsLeon W La Bombard, Henry J Haas
Original AssigneeInt Paper Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Side-seam-sealed container
US 3604613 A
Abstract  available in
Images(1)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Unite States Patent Henry J. Haas Scarsdale, N.Y.;

Leon W. La Bombard, Nashua, N11. 862,098

June 25, 1969 V Division of Ser. No. 628, 709, Apr. 5, 1967, Pat. No. 3,495,507.

Sept. 14, 1971 International Paper Company New York, NY.

lnventors Appl. No. Filed Patented Assignee SlDE-SEAM-SEALED CONTAINER 4 Claims, 6 Drawing Figs.

11.8. CI 229/37 R, 229/17 G, 229/3. 1, 229/48 T Int. Cl 865d 5/40 Field of Search 229/37, 3.1,

[56] References Cited UNITED STATES PATENTS 2,333,330 11/1943 Moore 229/48 X 2,959,336 11/1960 Mosse et a1. 229/48 X 3,365,111 1/1968 McNair, lr.et a1. 229/17G 3,444,792 5/1969 Thesing et a1 93/35 Primary Examiner-Donald F. Norton Attorney-Charles B. Smith ABSTRACT: A container for packaging fluids is made from a scored folded blank of coated paperboard. The container is made resistant to leakage by preventing the uncoated edge of a side-sealing panel from taking up fluid. This edge is protected by skiving a strip adjacent to the edge of the sealing panel, scoring the center of the skived strip and folding it on the scoring so that the skived faces are in intimate contact with each other. The container is folded from the prepared blank and seam sealed.

HEAT AD PRESSURE BQND PATENIED SEPMIBII F'IGJ FIG.6.

Q m I m m m m m d m {MM 0 lo m U by n mwm w mm Xx vi I 4 a m r 3 w HM 7 m WW" mm w ma w H 5% a a; w 3? 0 w d w W" n u w e 5 4 M M M. u N n B H n H g N I If 7 u i E n .3 I 7'" n a R m; u l m if" I I w u l 1 M a? m H SIDE-SEAM-SEALED CONTAINER This is a division of application Ser. No. 628,709, filed Apr. 5, 1967, now U.S. Pat. No. 3,495,507.

BACKGROUND OF INVENTION The packaging in paperboard containers of fluids such as soft drink syrups raises problems of leakage both into and out of the container. The containers are made of coated paperboard, scored and folded to the desired shape. The blanks for the containers are cut from the paperboard and thus have unsealed edges. If the fifth" or sealing panel is on the inside, the contained fluid wicks into the raw edge weakening the container so that it may rupture under stress. If the sealing panel is on the outside, unwanted foreign material may leak into the container by wicking.

Efforts have been made in the past to inhibit and hopefully to stop this leakage with mixed results. The uncoated edges have been coated with sealing material. The coating on one face and the paperboard have been removed in a strip and the remaining coating folded over. The edge portions of the container material have been skived and folded together with intervening adhesive. Feather-edge or tapered skiving has also been used.

SUMMARY OF INVENTION Containers of the kind contemplated are made for blanks of paperboard coated with a substantially impervious layer or film of a plastic material such as polyethylene or another plastic having suitable qualities. Many containers of this kind are of rectangular section, usually square. For making such a container the blank is scored to define four sidewall panels and a relatively narrow side-sealing panel sometimes called the fifth" panel. The blank is further scored to divide each panel into top, body, and bottom or end sections.

In order to better solve the noted problems of making coated paperboard containers, it is proposed in accordance with this invention to prepare the container blank for assembly by skiving a strip on the sealing or fifth panel to a depth equal to half the thickness of the blank. A line is then scored down the middle of this strip on its unskived face dividing it into two parallel, half-width strips. The skived portion is then folded on the scored line so that the skived faces are in contact. Since the skived portion of the strip is half-thickness and the strip portions flanking the scored line are equal in width, the edge of the strip when folded fits tightly against the edge of the ledge formed by skiving and the folded portion is of the same thickness as the main stock. Because of the scoring and of the snug fit, no adhesive is needed in the fold. However, it is important that the fold line be ironed to reduce the springback tendency and thus keep the fold from unfolding through the heat activation period.

The side seam panel, which is bounded on its inner edge by a scored line between it and the adjacent body panel, is folded on this line to fit against a mating panel. The direction of the folding is such that the folded-over portion of the skived strip makes contact with the mating panel. Thus if the fifth panel is on the inside the folding is in one direction and if on the outside, in the other direction, and it is scored accordingly.

The sealing seam is wider than the folded-over skived strip by enough to obtain a bond beyond this strip. This part of the sealing seam may .be as wide as or somewhat wider than the folded strip. The sealing may be accomplished by the application of heat and pressure to the mating portions of the folded blank. The top and bottom portions of the container are formed on their scored lines and suitably sealed.

BRIEF DESCRIPTION OF DRAWING The features of this invention will be understood more fully and clearly from the ensuing description of illustrative embodiments thereof taken in connection with the appended drawings in which:

FIG. 1 shows a container blank on which the location of the scored lines and of the skived portion are indicated;

FIG. 2 is a perspective view of the erected container;

FIG. v3 is a section of the blank showing the location of skived and scored portions;

FIG. 4 is a section similar to FIG. 3 but with half of the skived portion folded unto the other half;

FIG. 5 is a section on line 55 of FIG. 2 showing a side seam assembled with the sealing or fifth panel inside the adjoining-body panel; and

FIG. 6 is a section similar to that of FIG. 5 but with the sealing panel outside of the adjoining body panel.

DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS As seen in FIG. 1, the blank 10 comprises the four body panels 11, 12, 13 and 14, and the side seam panel 15. The panel 15 has a strip skived over a portion of its width as indicated by 16 as is more fully shown in FIG. 3. The sidewall portions of the blank are denoted as 11w, 12w, 13w and 14w. The portions of the top and bottom or end of the container are denoted as III, 12!, Br and 14! and 112, 12c, 13c and 14e, respectively. The location of some of the necessary scored lines is indicated by dotted lines l8, 19, 20 and 21.

FIG. 2 shows the assembled container in perspective. The side-seam panel is on the inside and its edge is indicated by the dotted lines. The reference characters correspond to those of FIG. 1.

The sectional view of a portion of the container blank shown in FIG. 3 indicates where the side seam panel 15 has been reduced up to the shoulder 15a by skiving. The skiving removes material down to essentially half the thickness of the blank leaving a half-thickness portion 16. A line 17 is scored down the middle of the skived strip on its coated side and parallel to the scored line 18 at the intersection of the panels 14 and 15.

In the view of FIG. 4, the skived strip 16 is bent on the scored line 17 so that the skived faces are in contact. The edge of the strip 16 fits snugly against the shoulder 15a of the full thickness portion of the fifth panel 15. Because of the scored line 17 and a good fit, no adhesive is required in this fold. However, the fold line 17 should be ironed, as by passing the blank between a pair of rollers after the fold has been made, as shown in FIG. 4, to reduce the tendency for the end of panel 16 to spring back. Such ironing keeps the fold from unfolding during the heat-activation period.

A corner joint between the sidesealing panel 15 and the sidewall panel 11 is shown in FIG. 5. The sidewall or body panel 14 is shown as bent on the scored line 18. This represents a corner with the fifth panel 15 inside of the container.

In FIG. 5, the laminae of the coated paperboard are denoted. The plastic coatings Ila and are on opposite faces of the paperboard 11b. This of course applies to the whole blank and not only to what is disclosed of panel 11.

In FIG. 6, the fifth panel 15 is represented as outside of the first panel 11. In order that this may be done a scored line 18a may be made on the side of the blank 10 opposite to the line 18 as it is shown in FIGS. 3 and 4.

The joint is bonded by the application of heat and pressure thereto by conventional means for sealing containers of this kind. It will be noted in the joints of both FIGS. 5 and 6 that the folded-over portion 16 of the panel 15 is between 15 and the panel 11 to which it is sealed. It will be further noted that the bonding includes a portion of the panel 15 that has not been skived and is therefore of the full thickness of the blank. In FIG. 6 the edge of the panel 11 butts tightly against the side of the panel 14. Thus a strong leakproof joint is afforded.

The foregoing is a description of illustrative embodiments of the invention and is not intended as a limitation on what is claimed.

What is claimed is:

l. A fluid-packaging container which is resistant to penetration by the contained fluid and which protects the fluid from unwanted external substances, the container being constructed from a blank of foldable, plastic coated sheet material divided by scored lines into a plurality of contiguous sidewall 5 panels and a side seam panel, each panel divided by other scored lines into top, body and bottom and having one surface of the side-seam panel bonded to the free margin of a sidewall panel,

the side seam panel having a full thickness strip extending from and integral with the edge of one of said sidewall panels and a skived edge strip extending from and integral with the edge of said full thickness strip, said skived edge strip being skived substantially uniformly from one surface to a thickness of substantially one-half the thickness of said plastic coated sheet material, said skived edge strip having a centrally located scored line and being folded about said scored line with the skived surfaces being in intimate contact with each other, the free edge of said skived edge strip abutting against the free edge of said full thickness strip,

the outer surface of the folded portion of the skived strip being part of the surface bonded to the adjacent sidewall,

and

top and bottom closure portions defined respectively by the top and the bottom sections of the panels.

2. A container as in claim 1 in which the plastic layers comprise a low-density polyethylene.

3. A container as in claim l-in which there are four sidewall panels defining a container rectangular in section.

4. A blank for a container for packaging fluids which tend to penetrate the container or are contaminated by the ingress of foreign materials, which comprises a foldable sheet of paperboard having both faces coated with an essentially impervious plastic layer, the sheet being divided by scored lines into a plurality of sidewall panels and a side seam panel, the side seam panel including a skived strip adjacent to one edge and a scored folding line parallel to its edge in the center of the skived strip on its unskived face, the remaining thickness of said skived strip being uniformly substantially one-half the thickness of said sheet, the free edge of the unskived portion of said side seam panel forming a shoulder against which the free edge of said skived strip is adapted to abut when said skived strip is folded about said scored folding line with the skived surfaces in intimate contact with each other.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION patent 3,604 ,613 Dated September 14, 197].

Inventor(s) Haas et a1.

It is certified that error appears in the shove-identified patent and that said Letters Patent are hereby corrected as shown below:

Col. 1, line 29, "for" should be --from--.

Col. 3, line 7, after "bottom" insert --sections, which comprises a body portion defined by the side wall panels-.

Signed and sealed this 7th day of March 1972.

(SEAL) Attest:

ROBERT GOTTSCHALK EDWARD M.FLETCHEB,JR.

Commissioner of Patents Attesting Officer-

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2333330 *Jan 7, 1941Nov 2, 1943Arlington Moore GeorgeContainer and method of manufacture
US2959336 *May 28, 1957Nov 8, 1960Metal Box Co LtdCartons
US3365111 *Mar 21, 1966Jan 23, 1968Int Paper CoLaminated container
US3444792 *Aug 18, 1965May 20, 1969Holstein & Kappert MaschfMethod for the production of tubes
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4239150 *Dec 4, 1978Dec 16, 1980PKL Papier- und Kunststoff WerkeFolding cartons for liquids
US4515580 *May 25, 1982May 7, 1985International Paper CompanyBottom sealing tab prebreaking apparatus
US4558814 *Dec 14, 1983Dec 17, 1985Champion International CorporationReinforcement for bottom major horizontal score line of container
US4572426 *Apr 18, 1984Feb 25, 1986Ex-Cell-O CorporationPaperboard container with internal raw edge protection and method for constructing same
US4589591 *Nov 18, 1983May 20, 1986Tetra Pak International AbJoint on packing containers and a method and arrangement for the manufacture of the same
US4617211 *Jun 17, 1985Oct 14, 1986International Paper CompanyMethod and apparatus for skiving and hemming
US4655386 *Jan 2, 1986Apr 7, 1987Tetra Pak International AbPacking container blank and container made therefrom
US4657142 *Jul 18, 1985Apr 14, 1987Meiji Seika Kabushiki KaishaEasy-to-open carton for confectionery or other food products including a skive underlying a tearstrip end
US4666044 *Oct 11, 1985May 19, 1987Pkl Verpackungssysteme GmbhTear-open flap orifice on packs consisting of plastic-coated laminated material with a folded-round fillet-seam closure and a process for producing the tear-open flap orifice
US4715527 *Sep 11, 1986Dec 29, 1987Toppan Printing Co., Ltd.Ultrasonically sealed side seam on cup
US4721243 *Sep 22, 1986Jan 26, 1988Elopak A/SLiquid carrying container and blank
US4756131 *Jan 15, 1987Jul 12, 1988Stoakes Richard LewisWall with multiple layer panelling
US4802620 *Apr 1, 1988Feb 7, 1989Champion International CorporationGable top carton for preventing wicking
US4819863 *Nov 28, 1985Apr 11, 1989Elopak A/SFluid-tight sealed container with lid
US4820253 *Nov 5, 1987Apr 11, 1989Elopak A/SMethod for obtaining a container blank
US5021040 *May 21, 1987Jun 4, 1991Phillips Robert DPaperboard container having leak preventative raised sealing scores
US5286538 *Aug 3, 1992Feb 15, 1994Leonard PearlsteinDisposable container for moist paper towels the same
US5409747 *Nov 19, 1993Apr 25, 1995Leonard PearlsteinDisposable container for moist paper towels and a method of making the same
US5458933 *Dec 17, 1993Oct 17, 1995Leonard PearlsteinCompostable packaging for containment of liquids
US5512333 *Apr 6, 1994Apr 30, 1996Icd IndustriesMethod of making and using a degradable package for containment of liquids
US5540962 *Apr 6, 1994Jul 30, 1996Leonard PearlsteinDegradable package for containment of liquids
US20020107126 *Jan 30, 2002Aug 8, 2002Shikoku Kakoki Co., Ltd.Process for producing sealed container and blank for sealed container
US20040102300 *Nov 24, 2003May 27, 2004Shikoku Kakoki Co., Ltd.Process for producing sealed container and blank for sealed container
EP0074340A1 *Jul 20, 1982Mar 16, 1983Ab Tetra PakA packing container blank and a packing container made from the blank
EP0144469A1 *Dec 5, 1983Jun 19, 1985AB Tetra PakA joint on packing containers and a method for the manufacture of the same
EP0179240A2 *Sep 4, 1985Apr 30, 1986PKL Verpackungssysteme GmbHContainer manufactured from a plastic coated fibrous material and provided with a longitudinal joint with a folded back portion, the container being also provided with a tearable portion facilitating the opening; process for the manufacture of such a tearable portion
EP0179240A3 *Sep 4, 1985Jul 27, 1988Pkl Verpackungsysteme GmbhContainer manufactured from a plastic coated fibrous material and provided with a longitudinal joint with a folded back portion, the container being also provided with a tearable portion facilitating the opening; process for the manufacture of such a tearable portion
EP0401423A1 *Aug 9, 1989Dec 12, 1990Italpack S.R.L.Web of foldable material, preferably of paper or carton, for the continuous packaging of a product, preferably a liquid
EP1228969A2 *Feb 1, 2002Aug 7, 2002Shikoku Kakoki Co., Ltd.Process for producing sealed container and blank for sealed container
EP1228969A3 *Feb 1, 2002Mar 24, 2004Shikoku Kakoki Co., Ltd.Process for producing sealed container and blank for sealed container
WO1985004848A1 *Apr 9, 1985Nov 7, 1985Ex-Cell-O CorporationPaperboard container with internal raw edge protection and method for constructing same
WO1996018544A1 *Dec 14, 1995Jun 20, 1996International Paper CompanyPackages with protected raw edges and method of manufacture
Classifications
U.S. Classification229/190, 229/5.81, 229/249, 229/184
International ClassificationB65D5/06, B65D5/56, B65D5/62
Cooperative ClassificationB29C66/4326, B29C66/02241, B29C66/135, B65D5/563, B65D5/62, B29C66/72328, B65D5/067, B29C66/431, B29C66/112
European ClassificationB29C66/135, B29C66/4326, B29C66/72328, B29C66/112, B29C66/02241, B29C66/431, B65D5/06D, B65D5/56B, B65D5/62