JPS62109744A - Carton formed from blank of expandable high molecular material and blank for said carton - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION This invention relates to the use of expandable polymeric materials
Lymsric materiml) material,
A hexahedral carton is generally formed from a rigid, single, foldable, sheet-like material.
), and in more detail, how many (,
1) the corners are sealed by means consisting of seven parts of said material, sealing the contents of the carton and thus preventing the contents of the carton from escaping and from the atmosphere; The present invention relates to a carton having features that prevent oxygen and humidity from entering the carton.

A hexahedral carton formed from a generally rigid, single, foldable, sheet-like material of paperboard or other fibrous material, such as breakfast cereals (
It is clearly a common practice to utilize a large number of packaging methods, such as breakfast cer@a1m packaging and powdered detergent packaging. To help prevent the contents of the carton from escaping through gaps or gaps that normally form at the corners of the carton, and to prevent atmospheric oxygen and humidity from escaping the carton contents. These cartons usually require separate measures to help prevent harmful effects. Such separate means may, for example, take the form of a separate seal placed in the carton, and the product to be packed is placed within said bag.

A variety of generally rigid polymeric materials, including expandable polymeric materials, offer numerous advantages over paperboard as a construction material, including attractive appearance, relatively low cost, They include moisture impermeability and good strength and stiffness properties with respect to thickness and weight, and for these reasons the polymeric material has gained a share in the paperboard market previously held by paperboard. did. However, to date, as a construction material for folded boxes or cartons for breakfast cereals and other dry goods individual products, polymeric materials have been used to seal the corners of cartons made of polymeric materials. Paperboard, skein and other fibrous materials cannot be largely eliminated due to technical challenges involved.

SUMMARY OF THE INVENTION In accordance with the present invention, a hexahedral carton is provided, the carton being a stamped sheet of polymeric material, generally formed from a single piece of rigid, bendable material; The material is composed at least to a large extent of a foamable polymeric material, which has a thickness, strength, and strength suitable for packaging many products that have traditionally been packaged in paperboard cartons. The material has stiffness and weight properties, and based on the compressibility of such foamed polymeric materials, it is still possible to provide an integral means for sealing the corners of the carton. , thereby eliminating the need for an inner bag and other separate means of achieving corner seals. Such a sealing feature is provided by a web-provided area or gusset.
t) at least adjacent to the score line (7) in some end flap portions of the material, and gussets in the area t in which the web is provided are placed between the folded end flaps. This is accomplished by punch-like compression of the core gusset being folded as a relatively thin sealing means located at the center of the carton, the score line defining a fold line along which the material passes through the carton. The folded end flaps define one or both of the carton's/paired sidewalls, usually the top and bottom walls, at the corners of the sidewalls.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an improved carton formed from a sheet-like material, which is generally rigid and bendable. More particularly, it is an object of the present invention to provide a carton formed from a generally rigid, bendable material of sheet polymeric material, the sheet polymeric material comprising at least a major portion thereof. is comprised of a foamable polymeric material, and the carton is formed from a stock of polymeric material that is comprised at least in large part of the foamable polymeric material. Still more particularly, it is an object of the present invention to provide an improved hexahedral carton, which carton is formed from a sheet of polymeric material, generally rigid and bendable. [7] The sheet-like polymeric material is composed at least in large part of a foamable polymeric material; and at least some corners sealed by.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following page provides a detailed explanation of the present invention with reference to the drawings and the following description.

As shown in FIG. 1, there is a stamped blank, indicated generally by the reference numeral //, from which a parallelepiped carton or a hexahedral carton can be formed. In the case of material for cartons packaging breakfast cereals, the material // is preferably 3 to 4 mills (m11.
777000 inches) (0,031, -θ, 011tO
It may be formed from an expandable general purpose or high impact I polystyrena having a thickness on the order of 1.5 inches (1.5 mm) and a density on the order of 1.5 g pounds per cubic foot. Preferably, moisture permeability (moisture permeability)
To improve its resistance to vapor transmission, the material// is provided with a thin layer of non-foamed polymeric material, such as polyethylene, on both surfaces thereof. These surface layers may be coextruded in a known manner onto a core of expanded polystyrene, for example one /, mils thick on the outer surface and θ, j mils thick on the inner surface. (co-extrusion).

extrusion coating or extrusion lamination
n) and preferably includes the use of a suitable agent such as ethylene vinyl acetate to ensure bonding of these dissimilar materials; may be applied between layers or to one or both adjacent layers. Anyway, the material // is a series of connected rectangular panels /2. /3. /4t, /j, the panels are integrally connected to each other, and the panels are made of scored material // with a fold line /o.

It is formed along /7 and /r. Also formed in the material // is a flap /9 which is integrally connected to the panel /J'' along the fold line 2/, which fold line is formed by making a cut. can be formed.

As illustrated in Figures 3 and ≠.

Forming a carton from the material is a fold line.

/7. including folding the material into a tube-like shape along /♂ and 2/, and moving panel /2 into position overlapping flap /2 to form the side seam of the carton.・In this tube-like shape, the channel 7.2 and the flap are heat sealed.
ng) or to each other by the use of adhesives or other known means of forming a bond in the carton.

The part of the carton that normally constitutes its bottom when the carton is in the upright position has a series of flaps 22, 23,
λμ and 2j, the series of flanos f2.2
．． 23, 2g,, 2j are broken lines! Otsu.

27. Along 2♂ and 2, each panel/2. /
3. /? It is integrally attached to /j. The flaps 22.23.2'l and 2j have slots 3/,
32 and 33, the slots are separated by fold lines 21.33 to form corner sealing means at the corners of the bottom structure of the carton. ,．． 27. ．． 2g and! It extends partially towards the fold line formed by the ridge. For the same reason, the outermost peripheral portion of the edge 22m of the flannel Δ~ is offset inwardly from the edge /, 2& of the material //. Slot 3/ is an extension of the broken line/B/A
With the fold line /lb extending outwardly towards the tab 2.2 from the intersection of the fold lines 27 and /B, a generally triangular gusset section 3.
! It contributes to defining r. This gusset is made of material/
In the punching operation to form /, the thickness is substantially less than the original thickness, such as the thickness of the scored fold line, or not more than /2 of the original thickness of the material //. , is compressed into . Similarly triangular shaped compressed gusset areas 3 and 37 are provided with slots 3.2 and 3, respectively.
3 and another triangular shaped compressed gusset area 3 is formed in the extension/rail a, which extension has a perforated 1 m, 29 It extends beyond the flap, 2J-, to approximately the end thereof.

As shown partially in FIG.
,22,. 24' is formed by extending inwardly from the 9-nel/2 and /l/l and being approximately perpendicular to the panel. One flap of the remaining flap,! j
is then folded inward so as to overlap 7 ratno 2.2 and 24t, and the remaining flap, 23, is folded inward so as to overlap flanno f, 2J-. As shown in the flap 2j, the innermost parts of the flaps 23 and 2J- may preferably be provided with triangular notched areas 2ja and -jb at their outer corners. The notched area is a gusset area 3 to facilitate machining of the corner area of the carton bottom.
J'' and one of the pair of gusset areas designated as 3z. In any event, gusset areas 3j and 39
is moved into position to overlap flap 22, and gusset areas 36 and 37 are flaps (/≠). 2 to ensure that the corners formed at the bottom of the carton are sealed. The overlapping flaps are joined together by a heat seal to permanently secure the bottom structure of the carton.

Although the top structure formed from the material // can be the same as the bottom structure described above, in a preferred embodiment of the present invention, the top structure formed from the material
According to U.S. Patent Application No. 631/4'j of
A recloseable spout is provided at one end of the top structure. The end portion away from the spout that can be closed is formed by a flap≠2, and the flap≠2 is attached in the same way as the flange f, 22 is attached along the fold line 2B. , is attached to the panel 7.2 along the fold 1 arch, and said end remote from the spout is further formed by partial flaps 73 and 4tj, and the flange 7. 4t3 and pt
are along fold #J4'7 and ≠9 respectively.
and /j, and the flaps 47-3 are spaced apart from the reflans 7'4' and 2 by partial depth slots 3/ (similar to slots 3/). has been done. The feature of having a spout is provided by a flange f4t'l having an uneven shape, which flap 1iLI/l is partially attached to the panel /4' along the fold line l/l, r, and the fold line ≠ The inwardly extending portions of 7 and 4t9 are partially attached along 7a and 119a, respectively. Fran f4t11
t is a rectangular central part a and a roughly L-shaped part <
Contains z Hirosu and ≠≠C, and the corresponding cross-shaped part 1lt
4'b, 4'4'a extend outward from both sides of the central portion 1h, and the slit portions H, 'l'lc extend along the fold lines /fa and /7m, respectively, to the central portion 4t4ta.
It is possible to bend against. Next, the broken line /fa
and /7& are each constructed from a broken line /do and an extension of /7. The flap 11t≠ further includes an outwardly extending peripheral tab portion≠4td, the tab portion≠l1t
d is attached to the center portion ≠a along the broken line 4t≠・. In addition to this, the L-shaped parts ggu b and g≠C
The legs of are separated from each other along fold lines ≠44f and ≠lltg, respectively, and both edges of the flap separated from.

In assembly of the carton top structure, after the tubular shape of FIG. 7 has been formed, the L-shaped portions 11.
As shown in the figure, the broken lines 1It11tf and ≠l
/1g, moving the currently folded L-shaped portions llb and 4t'la to a position extending outward from the central portion≠11ta.

As shown in FIG. is secured in position on the carton sides /j and /3 by a short length of removable self-adhesive tape until the carton is first opened. is shown in an inverted position,
and is shown in an open position, in which the structure formed by the flap 4t constitutes a spout;
By then re-closing the spout in the configuration shown in FIG. g, the flat cage can be re-closed at a desired time, even if only a portion of the contents of the f-cage have been removed. Then, the re-closed carton can be folded downwards and the tab portion 4'4'd of the flap keg can be folded downward without the need to use the material or its substitute again. / slot), , 5'', 2 and j3 can be fixed in the reclosed position.

The best mode for carrying out this invention has been described clearly, concisely, and precisely enough to enable any person skilled in the art to make and use the invention. However, it should be understood that certain modifications in the particular modes of carrying out the invention may be made by those skilled in the art without departing from the scope of the invention, and therefore:
It is desired that the invention be limited only according to the scope of the claims.

[Brief explanation of drawings]

FIG. 7 is a plan view of a preferred embodiment of the material according to the present invention, FIG. 2 is a partially enlarged explanatory view showing a part of the material in FIG. 1, and FIG. FIG. 6 is an explanatory diagram showing the raw material in an initial step of forming the carton from the raw material; FIG. 6 is an explanatory diagram showing a carton partially formed from the raw material of FIG. 1; 6 is an enlarged partial explanatory diagram showing seven parts of the carton formed from the material shown in FIG. 1; FIG. 6 is a partial enlarged view of seven parts of the carton formed from the material shown in FIG. As an explanatory drawing, FIG. 7 is an enlarged partial explanatory view of seven parts of the carton shown in FIG. Figure g is an explanatory diagram of an assembled carton formed from the materials shown in Figure 1, and Figure 3 is an explanatory diagram showing the characteristics of the spout of the carton formed from the materials shown in Figure 1. 70 is a partially enlarged explanatory view of seven parts of a carton formed in a selective manner from the material shown in FIG. 1;
FIG. 1 is a partially enlarged explanatory view of the carton shown in FIG. 1O, and is a diagram showing a state in a carton forming step following the step shown in FIG. 70. //...Material, /2, /3, /4', /
l...Panel, /2. / Otsu b, /7. /7m, /
J', /Ia. ,2A ,,27.2g ,29 +4'4'e ,4
Z! f, matter g. FA, 4t7, 4t9-'Fr line, /'? ,,
2/ ,,2. ? . 23.2≠,,2j,4tλ,≠3. Gu≠, Guj...
Flap, 3/, 32,. 33,! r/l-,2
,63-=S4t,/,2*,22*・=Edge,/Ot a r/L? a +4Z7m, 4Zri a... extension, 3j, 3otsu, 3713ri... gusset, ko J''m
,,2J'b...Notched area, 4<! a...
・Central part (of flannel f≠≠). ≠1Itb, +! a. L-shaped part (of flap + p), ++d... tab part (of flannel). FIG, 3 FIG, 4 FIG, 7 Procedural amendment (spontaneous) April q, 1986 Mr. Michibe Uga, Commissioner of the Patent Office■, Indication of case Patent application No. 1988-240708 3
, Relationship with the case of the person making the amendment Patent applicant name, Owens-Illinois Inni] - Borated 4, Agent zip code 105 6. Number of inventions increased by the amendment Details of the amendment■, Previously submitted specification Correct as shown below. (1) Amend the scope of claims as shown in the attached sheet. (2) Correct r14 and 15J on page 11, line 14 to "14 and 15". (3) Delete "and" from the last line of page 19. ■Correct Figure 1 of the drawing as shown in the attached sheet. Above 2, Claims jλ1L Luf Sheets! 1lJ - River 71 A1 Δ Hi 1 Kidney j Shuno 1 East 4 Be @ Lao Ji Tosuya vs - Rezu front 2 ends 4 Confronting SO ni ρ nu]) 澾 - One periphery of the front IYtr material 61
; Kajin said, A-2's franc 1 was completed and Mii Mu J
And then I left the next door to the side.
Punini Ln-L- Hashiramoto-Maeki 11-Nada 1'i Sho-Minj (Material 1Lζ''l■J
1) 1R corner 1 and 1P notch, which are bent over 4 and placed with
Momme (Yo Mae Fububu Moe and Da) "Z" □ Area's -1-2-ζ paper has been published for a long time?
”-Mu-(8) Said-Force 1 to No 2:-Marriage structure-1 front origin (2's origin The carton according to item 4 of the box.
(He was killed by one of his four clubs) - Sochi - Y-year-old 11-year-old friend, Qe 73
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J to d (9-Hakuhair y1 奎夾q くら人3
Sudo Shiyu Maeku U14 Fishing Hiton - Tensei μ cable material. = 10-

Claims (9)

[Claims] (1) In a hexahedral carton generally formed from a single sheet-like material of a rigid polymeric material, the carton: consists of four consecutively connected panels in the material; a first panel and a fourth panel of said panels are joined to each other at a seam, comprising four sides formed into a tube shape by folding along a fold line at the joint; a self-sealing end structure formed at one end of said tube shape by inwardly folding four flaps comprised of sections, each of said flaps depending from one of said panels; , and foldable against one of the panels along a fold line at the joint between the flap and the panel;
the flaps are separated from each other by slots;
the slot extends partially from the peripheral edge of the flap to the fold line at the joint between the flap and the panel;
unslotted parts of flaps and panels;
gusset areas are defined between the fold lines at the joints between the flaps, each of the gusset areas defining an adjacent pair of gusset areas when the end structure is formed by folding the flaps inwardly against the panel; A hexahedral carton comprising means located between said flaps for sealing a corner between said flaps; and for closing the other end of the carton. (2) The carton according to claim 1, wherein most of the polymeric material contains a foamable polymeric material. (3) The carton according to claim 1, wherein the inside of the carton is in direct contact with the contents of the carton. (4) a majority of the thickness of the stock comprises expanded polystyrene material, the stock is formed by stamping, and each of the gusset areas is reduced to a thickness of about 1/2 or less of the thickness of the stock during the stamping process; 4. A carton as claimed in claim 2 or 3, which is compressed to reduce the corner thickness of the self-sealing end structure. (5) one outer peripheral edge of the flap end structure includes a notched region, the notched region is aligned with a gusset region of the folded pair of flaps; 2. A carton according to claim 1, wherein the gusseted region engages the folded gusset region to increase the rigidity of the bottom structure of the carton. (6) In sheet-shaped, generally rigid, single-puncture polymer material materials that are suitable for forming hexahedral cartons: Continuously connected. four panels having a generally rectangular shape, the panels being separated so as to be foldable with respect to each other along fold lines that cut between the panels; hanging from one edge of each of the panels; and flaps foldably separated from the panel along a scored fold line, the flaps being partially separated from each other by slots, the slots extending along the peripheral edges of the flaps. extending partially from the section to a notched fold line separating adjacent flaps from the panel, with respect to which the flaps are foldably separated; together with the inserted fold line define a gusset area, the gusset area adapted to seal the corner of the bottom structure formed from the depending flaps when the material is folded into a carton; and the edges of the panel. 1. A single stamped blank of polymeric material, characterized in that it includes means extending from the section and adapted to form the top structure of a carton when said blank is folded into a carton. (7) the majority of the thickness of the blank is formed from an expandable polymeric material, and each of the gusset areas is compressed in the punching process to a thickness of about 1/2 or less of the thickness of the panel portion of the blank; The material according to claim 6. (8) The material according to claim 7, wherein the expandable polymer material includes expandable polystyrene. (9) one of the depending flaps is provided with a pair of notches at its periphery, each notch engaging a gusset area when the flap is folded to form a bottom structure in the carton; Claim 1 or 7 promotes increasing the rigidity of the bottom structure.
Materials listed in any of the sections.