CA1140514A - Container for liquid product - Google Patents

Container for liquid product

Info

Publication number
CA1140514A
CA1140514A CA000361073A CA361073A CA1140514A CA 1140514 A CA1140514 A CA 1140514A CA 000361073 A CA000361073 A CA 000361073A CA 361073 A CA361073 A CA 361073A CA 1140514 A CA1140514 A CA 1140514A
Authority
CA
Canada
Prior art keywords
panel
container
leak
side edges
tabs
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
Application number
CA000361073A
Other languages
French (fr)
Inventor
Gary A. Ramich
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.)
Primerica Inc
Original Assignee
American Can Co
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 American Can Co filed Critical American Can Co
Priority to CA000361073A priority Critical patent/CA1140514A/en
Application granted granted Critical
Publication of CA1140514A publication Critical patent/CA1140514A/en
Expired legal-status Critical Current

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Abstract

CONTAINER FOR LIQUID PRODUCT

ABSTRACT OF THE DISCLOSURE

A container for liquid product, such as yogurt or other dairy products, is disclosed which is formed of a single sheet of paperboard folded into a cup-like container. The container includes a front and a back panel which are folded into a tubular shape and are sealed together along their side edges. At the bottom of the container, an infolding flap arrangement is provided, and an anti-leak tab is formed along the bottom edge of the front panel of the container to be inserted between the infolding flaps at the bottom of the container and the rear panel to inhibit fluid leaks from the bottom of the container.

Description

114U~
BACKGROUND OF THE INVENTION

Field of the Invention .' The present invention relates to containers in general and in particular, to cup-like containers for dairy products and other liquid materials.

Description of the Prior Art .
The prior art is generally cognizant of the use of cup-like containers for use by in merchandising product and also for use as drlnking cups. Examples of such containers are shown in U.S. Patent No. 1,050,100, No. 1,073,481, No.
1,129,364, No. 1,953,884, No. 2,168,186, No. 2,240,599, No.
2,577,109, and No. 3,381,877.
There are also examples in the prior art of such containers in which a pair of panels forming the opposite sides of the container are joined by a bottom panel and also by infolding bottom side flaps designed to seal the sides of the bottom of the container. An example of such a container is shown in U.S. Patent No. 4,020,988.
Shown in Figs. 1-3 is a paperboard cup-type container for liquid product, generally indicated at 1, which is prior art to the container of the present invention. The blank for the contalner 1, as shown in ~ig. 1, includes a pair of front and back panels 2 and 3 with the front panel 2 being sllghtly wider than the rear panel 3. The panels 2 and 3 are joined at their bottom edges by a bottom panel 4. Along each side edge o the bottom panel 4 an infolding flap construction formed of a triangular infoldins side bottom elap 5 and a pair of gusset flaps 6 is formed joining the bottom panel 4 to each of the front panel 2 and the rear panel 3. A pair of side flap e~tensions 7 are formed along I
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the sides of the front panel 2. As can be seen in Fig. 2, the blank of ~ig. l is assembled into the cup l of ~ig. 3 by folding up the ~ront and rear panels 2 and 3 and infolding' the bottom side flaps 5 with the gusset flaps 6 being folded behind the infolding flaps 5. The side flap extensions 7 of the front panel 3 are inserted inside of the rear panel 3 . and are sealed thereto while the gusset Elaps 6 are secured to the inside of the rear panel 3 to construct the cup l as shown in Fig. 3.

SU~MARY OF THE I~VENTION
:,. ' .
The present invention is su~marized in that a paper- ¦
. board,container for liquid product includes a front~panel having a pair of side edges and a bottom edge, a rear panel having a pair of side edges and a bottom edge, a sealiny flap extension formed on each of the side edges of the front panel, the sealing flap extensions being sealed to the side edges of the rear panel such that the front and rear panels are shaped to form a tubular container, a bottom panel extending between the bottom edges o the front and rear panels to close the bottom of the container, the bottom panel having a 2air of side edges, a triangular inolding bottom side flap attached to each of the side edges of-the ~' bottom panel and folded upward into the interior of the container, a pair of gusset flaps connecting each of the bottom side flaps to each of the front and rear,panels, the gusset flaps being folded against the adjacent bottom side ~ flap, and an anti-leak tab extending ou-tward from each of i~ ~the sealing flap extensions on the front panel at the bottdm portion thereof, the anti-leak tabs each being positioned between and sealed to ~he adjacent susset flaps ,~ . . I

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and the inside of the rear panel to inhibit fluid flow therebetween.
It is an objec-t of the present invention to construct a cup-typs container for a liquid product in which a secure and leak-resistant bottom edge seal is simply and efficiently formed.
It is another object of the present invention to provide such a cup with such a leak-resistant seal at a minimal cost and with a maximum e,fficiency.
Other objects, features, and advantages of the present invention will become apparent from the following specifi-cation when taken in conjunction with the accompan~ing drawings.
~.' . ~ .

.
Fig. 1 is a plan view of a blank for use in constructing a container in acco,rdance with the prior art.
, Fig. 2 is a perspective illustration of an intermediate step in constructing a container from the blank of Fig. 1.
Fig. 3 is a perspective view of a container in accordance with the prior art.
Fig. 4 is a blank for use in constructing a container in accordance with the present invention.
Fig. S is an intermediate step ln constructing the container from the blank of Fig. 4.
Fig. 6 is a container constructed in accordance wlth the present invention.
. I
¦ DESCRIPTION OF THE PREFERRED EL'IBODI.~ENT

Shown in Figure 1 is a paperboard blank, generallv indicated at 10, for use in constructing a paperboard con-tainer for liquid product in accordance with the present ~ )519~ 1 invention. mhe blank 10 generally includes a front panel 12 and a rear panel 13, both formed of a relatively large size and having diverging side edges and generally aligned and spaced apart bottom edges. A bottom panel 1~, of a generally square shape, is provided connecting a portion of each of the bottom edges of the fron-t panel 12 and the rear panel 13 to each other. The bottom panel 14 also has a pair of side edges to each of which is attached a respective one of a pair of infolding side bottom flaps 15. The side bottom flaps 1.5 are each formed in a generally triangular shape with the longest side of such triangle being colinear with the respective side edge of the bottom panel 14. Connecting the other two edges of each of the infolding bottom side flaps 15 with the adjacent bottom edges of the front panel 12 and the rear panel 13 are gusset flaps 16. Two of the gusset flaps 16 are associated with each infolding bottom side flap 15 to connect that bottom side flap 1.5 with the bottom edge of each of the front panel 12 and the rear panel 1~. Along each of the side edges of the front panel 12 a sealing flap extension 17 is for~.ed extending outward the sides of the front panel 12 to make the front panel 12 wider than the rear panel 13. Extending Laterally outward from a bottom portion of each of the sealing flap extension 17 is an anti-leak tab 18. The antileak tabs 18 are each formed in a generally triangular shape having their ~ottom edge being a generally linear e~tension of the bottom ed~e of the front panel 12. The anti leak tabs 18 are sized so that the length of the lon~ side of each of the adjacent bottom side flaps 15 is appro~imately equal to the lenyth of the botto~
edge of the front ?anel 12 beginning adjacent to the corner .
of the bottom flap 14 and continuing out to the end of the anti-leak kab 18. The reason for this sizing will be apparent below.

. . ~ S~ ~

Shown in Figure 5 is the method for erecting the blank of Figure 4 into the finished container for liquid product 10 as shown in Figuxe 6. The front panel 1~ and the rear panel 13 are each folded upward relative to the bottom panel 14. At the same ti~e, the infolding side bottom flaps 15 are folded upward into the interior of the container with the adjacent gusset flaps 16 being folded behind the side bottom flaps.15 inside of the adjacent front panel 12 or rear panel 13. As the front panel lZ and the rear panel 13 .¦
are folded together, the sealing flap extensions 17 are inserted inside.of the side edges of the rear panel 13 and are sealed thereto preferably by heat sealing although ' adhesive bonding is also usable. As the sealing flap extensions 17 are inserted inside of the side edges of the rear panel 13, the anti-leak tabs 18 are inserted also inside of the rear panel 13 between the rear panel 13 and the adjacent gusset flaps 16 connecting the rear panel 13 to the two bottom side flaps 15. The anti-leak tabs 18 rest in the finished container 10 with their bottom edges lying along the scoreline connecting the opposite gusset flap 16 ,to the rear panel 13 and are secured by the heat sealing process to the inside of the rear panel 13 and to both of the gusset flaps 16. The length of the anti-leak tabs 18 ensures that the anti-leak tabs 18 extend along the entire distance of both of the gusset flaps 16 adjacent thereto so "'that the far end of each of the anti-leak tabs 18 i.s positloned ¦
adjacent to the junction at the corner of the bottom panel 14 connecting the bottom panel 14 to each of the rear panel 13 the side bottom flap 15 and the gusset flap 16.
30 : The container 10, as shown in Figure 6, functions as a secure leak-resistant container for liquid product such as ¦ yogurt r other dairy products. The provision for the anti-~ . . . .~
~ ' .

~ )5i9L
leak ~abs 18 helps to prevent the container 10 ~rom leakin~
product in a fashion that commonly occurs in,containers of this type. In other similar contai\ners, liquid product can "channel" or be drawn by capillary action between the rear panel and the adjacent gusset flap since there is very often a gap between these components at the marginal side edge of the front panel. In the container 10, the pro~ision for the anti-leak tabs 18 insures that the gaps or imperfect seals which might otherwise exist between the rear panel 13 and the gusset flaps 16 at the marginal side,edges of the extensions 17 of the front panel 12 are sèaled. This pro-, vision for the anti-leak tabs 18 is sufficient to insure that such channelling or capillary action does not take place and that all components of the bottom of the container 10 may securely be sealed together. This result is e~tremely advantageous in thç use of such containers for liquid product in that the shelf life of the container is greatly enhanced and the consumer exceptance of the product in such container is also greatly increased. These resul-ts are acco~plished with a minimal requirement of additional stock material and no additional cost or complication in the'cons-truction and erection of the container itself.
It is understood that the present invention is not limited to the particular construction and arrangement of parts disclosed and illustrated herein, but embraces all such modified orms thereof that come within the scope of the f owing claims.

' ~ -7~

Claims (8)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A paperboard container for liquid product comprising:
(a) a front panel having a pair of side edges and a bottom edge;
(b) a rear panel having a pair of side edges and a bottom edge;
(c) a sealing flap extension formed on each of the side edges of the front panel, the sealing flap extensions being sealed to the side edges of the rear panel such that the front and rear panels are shaped to form a substantially cylindrical container;
(d) a bottom panel extending between the bottom edges of the front and rear panels to close the bottom of the con-tainer, the bottom panel having a pair of side edges;
(e) a triangular infolding bottom side flap attached to each of the side edges of the bottom panel and folded upward into the interior of the container;
(f) a pair of gusset flaps connecting each of the bottom side flaps to each of the front and rear panels, the gusset flaps being folded against the adjacent bottom side flap; and (g) an anti-leak tab extending outward from each of the sealing flap extensions on the front panel at the bottom portion thereof, the anti-leak tabs each being positioned between the adjacent gusset flaps and the inside of the rear panel to inhibit fluid flow therebetween.
2. The paperboard container of Claim 1 wherein each of the anti-leak tabs is triangular in shape.
3. The paperboard container of Claim 1 wherein the bottom edge of each of the anti-leak tabs is an extension of the bottom edge of the front panel.
4. The paperboard container of Claim 3 wherein each of the anti-leak tabs is of sufficient length to extend to the end of the adjacent bottom side flap adjacent to the rear panel.
5. A paperboard blank adapted for erection into a container for liquid product, the blank comprising:
(a) a front panel having a pair of side edges and a bottom edge;
(b) a rear panel having a pair of side edges and a bottom edge;
(c) a bottom panel extending between the bottom edges of the front and rear panels, the bottom panel having a pair of side edges;
(d) a triangular infolding bottom side flap attached to each of the side edges of the bottom panel;
(e) a pair of gusset flaps attached to each of the bottom side flaps connecting each of the bottom side flaps to the bottom edges of each of the front and rear panels;
(f) a sealing flap extension formed along each of the side edges of the front panel; and (g) an anti-leak tab extending outward from each of the sealing flap extensions, the anti-leak tabs being adapted to be folded between the interior of the rear panel and the adjacent gusset flaps in the erected container to inhibit fluid flow therebetween.
6. The paperboard blank of Claim 5 wherein each of the anti-leak tabs is triangular in shape.
7. The paperboard blank of Claim 5 wherein the bottom edge of each of the anti-leak tabs is an extension of the bottom edge of the front panel.
8. The paperboard blank of Claim 7 wherein each of the anti-leak tabs is sufficiently long so as to extend to the end of the adjacent bottom side flap adjacent to the rear panel when the container is erected.
CA000361073A 1980-09-26 1980-09-26 Container for liquid product Expired CA1140514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000361073A CA1140514A (en) 1980-09-26 1980-09-26 Container for liquid product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000361073A CA1140514A (en) 1980-09-26 1980-09-26 Container for liquid product

Publications (1)

Publication Number Publication Date
CA1140514A true CA1140514A (en) 1983-02-01

Family

ID=4117999

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000361073A Expired CA1140514A (en) 1980-09-26 1980-09-26 Container for liquid product

Country Status (1)

Country Link
CA (1) CA1140514A (en)

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Date Code Title Description
MKEX Expiry