CA1156984A

CA1156984A - Reclosable container

Info

Publication number: CA1156984A
Application number: CA000364610A
Authority: CA
Inventors: Gerald H. Scheibner
Original assignee: Union Carbide Corp
Current assignee: Union Carbide Corp
Priority date: 1980-06-02
Filing date: 1980-11-13
Publication date: 1983-11-15
Also published as: AU6491280A; AU534254B2; DE3032889C2; DE3032889A1; NZ195495A

Abstract

IMPROVED RECLOSABLE CONTAINER

ABSTRACT OF THE DISCLOSURE

A reclosable container features ridges near the opening of the container to provide improved gripping of the container by the user during the opening and loading of the container. The container has first and second sidewalls including first and second closure profiles positioned respectively on said first and second sidewalls.
The first sidewall has first and second ridges spaced apart from each other on the surface of the first sidewall wherein the ridges are arranged substantially parallel to the first closure profile on the first sidewall. The first ridge is positioned near the end edge of the first sidewall, and the second ridge is positioned substantially opposite the end edge of the second sidewall of the container when the closure profiles are occluded. The second sidewall has a third ridge on its surface which is arranged substantially parallel to the second closure profile and is located near the end edge of the second sidewall. The first sidewall extends beyond the end edge of the second sidewall.

S P E C I F I C A T I O N

Description

This invention relates to a reclosable con-tainer, and particularly, a container having a closure fastening device including two closure profiles operable for being interlocked continuously over a predetermined length.
Generally, containers having closure devices are well known in ~he art. U. S. Patent No. 4,186,786 to Kirkpatrick is an example of the type of container which can be improved by the instant invention.
The use of flexible reclosable containers is widespread and is often used in homes for the storage of various items such as food. It is not uncommon that the opening of an occluded closure fastening device on a container is made somewhat more difficult by the smoothness of the container sidewalls in the vicinity of the opening of the container. This is particularly a problem if the user has slippery fingers as a result of handling greasy food or the like. Furthermore, the smoothness of the sidewalls near the opening of the container makes it somewhat more difficult to hold the open container during loading.
U. S. Patent No. 3,371,696 to Ausnit teaches the use of a raised bead at the edge of one sidewall at the opening of the container to improve the access-ibility of the container opening. This patent, however, does not teach or suggest a construction which elimi-nates the gripping problem, especially Eor a user with slippery fingers.

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,, p~ r jgj~3~L 12 3 61 The instant invention surprisingly impro~es the ease with which a reclosable container can be opened by positionin~ ridges near the reclosable end of the container to provide the best user convenience.
The ridges also per~it the ~Iser to hold the open con-tainer durin~ loading with less effort as compared to the prior art containers.
In its broadest form, the invention is a container having a reclosable end, comprising flexible first and second sidewalls, and a closure fastening device including first and second closure profiles ?ositioned on respective first and second sidewalls and operable for being occluded and disengaged with respect to each other to close and open the container; and features the first sidewall extending beyond the end edge of the second sidewall at the reclosable end, first and second ridges spaced apart from each other on the surface of the first sidewall and arranged substan-tially parallel to the first closure profile, the first ridge being positioned near the end edge of the first sidewall, and the second ridge being positioned sub-stantially opposite the end edge of the second sidewall with respect to the container when the closure profiles are occluded, and a third ridge on the surface of the second sidewall and arranged substantially parallel to the second closure profile, the third ridge positioned near the end edge of the second sidewall.
In a preferred embodi~ent, the first and second ridges are on the inside surface of the first sidewall and the third ridge is on the inside surface ~ 3~ 12361 of the second sldewall. Preferably, the third ridge is positioned substantially opposite the region of the first sidewall bordered by the second ridge and the first closure profile with respect to the container when the closure profiles are occluded.
Other preferred embodiments feature the sidewalls being transparent or translucent or opaque and the r'idges being colored to be easily recognized visually with respect to the sidewalls.
Yet another preferred embodiment features each of the ridges having a polygonal cross section with well defined vertices. Preferably, the polygonal cross section is tra?e~oidal or triangular. The trape-zoidal and triangular cross sections have been found to be the most convenient for users especially when the ridges are located on the inside sur~aces of the sidewalls.
The invention accordingly comprises the features of construction, cornbination of elements and arrangement of parts which will be exemplified in a construction hereinafter set forth.
For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description, taken in connection with the accompanyin~ drawin~s, in which:
FIG. 1 is a perspective view of an opened con-tainer in accordance with the invention;
FIG. 2 is a front elevational vi.ew of the con-tainer of FIG. 1 with the closure fastening device occluded;

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FIG. 3 is a side elevational view of the con-tainer of FIG. l; and FIGS. 4A, 4~, 4C, 4D, and 4E are side ele-va-tional views on an enlarged scale of portions of con-tainers according to the invention.
In carrying the invention into effect, several embodiments have been selected for illustration in the accompanying drawings and for description in this speci-fication, reference being had to the FIGS. 1, 2, 3, 4A, 4B, 4C, 4D, and 4E.
~IG. 1 shows a perspective view of an opened container 10. The container 10 has sidewalls 11 and 12 which are typically thin, flexible, transparent plastic film which has been folded along bottom edge 13 and heat sealed along vertical side edges 14 to define a pouch.
The container 10 includes a closure fastening device 16 such as described in the aforementioned U.S.
Patent No. 4,186,786. The closure device 16 includes closure profiles 17 and 18 which can be occluded and disengaged with respect to each other for closing and opening the container 10.
It can be seen rom FIG. 2 that the use of transparent sidewalls 11 and 12 results in the visual recognition that there are three ridges 199 21, and 22, above the closure fastening device 16.
FIG. 3 shows the relative positions of the ridges 19, 21, and 22 with respect to the top edges 23 and 24 as well as the closure profiles 17 and 18.

~ 4 12361 YIGS. 4A, 4B, 4C, 4D, and 4E show various polygonal cross sections of ridges 19/ 21, and 22 in positions on the inside and ou~side surfaces of the sidewalls 11 and 12. The ridges should be above ~he closure profiles 17 and 18 towards the top edges 23 and 24 for satisfactory performance in practicing the invention.
Preferably, the ridges 19, 21, and 22 are located on the inside sur~aces of the sidewalls 11 and 12.
In FIG. 4A, the ridges 19, 21, and 22 have trapezoidal cross sections with the typical dimensions as follows. The width "a" is from about 0 to about 0.100 inch, the width "b" is from about 0.005 to about 0.100 inch, and the height "c" is from about 0.010 to about 0.050 inch. FIG. 4B shows the ridges ; 19, 21, and 22 as having triangular cross sections which corresponds to the width "a" of FIG. 4A being about zero. FIG. 4C shows the ridges as having rectangular cross sections which correspond to the widths "a" and "b" of FIG. 4A being substantially equal to and parallel to each other. FIGS. 4D and 4E are other arrangements of ridges 19, 21, and 22, having polygonal cross sections.
It is not necessary for all of the rldges 19, 21, 22 to have the same corresponding dimensions.
In fact, the best mode as ~ill be described features ridges 21 and 22 being about the same but being different from the ridge 19.
The best mode embodiment o:~ the invention is as Eollows.

~ ~5~ ~3~ 123~1 The sidewalls l.l and l2 are clea~, fle~ible, polyethylene film and the closure astening device 16 is the ~ype disclosed in the aforementioned U.S. Patent No. 4,1~6,786.
The container lO width is about 10 1/2 inches and the height is about 11 3/4 inches. The closure fastening device 16 is about 5/8 inch below ~he top edge 24. The ridge 19 is less than about 1/8 inch below the top edge 23 and the ridge 21 is about 1/8 inch below the ridge 22. The top edge 23 is at sub-stantially the same level as the ridge 21 when the closure fastening device 16 is occluded. The ridge 22 is about l/16 inch below the top edge 24.
The ridges 21 and 22 have dimensions "a" and "b" about 0.015 inch each and dimension "c" of about 0.025 inch. The ridge 19 has dimension l'al' of about 0.035 inch, dimension "b" of about 0.0~5 inch, and ~ dimension 'Ic'' of about 0.030 inch.
;~ The ridges 19, 21, and 22 are colored yellow, closure profile 18 is clear, and closure profile 17 is colored blue.
The operation o:E the container according to the invention is as ~ollows.
user in the process of opening the container 10 wit~ occluded profiles 17 and 18 can easily separate the top edges 23 and 24 because the sidewall 12 is longer than the sidewall 11, and the ridge 22 is practically automatically engaged by the thumb o~ the user if the user strokes his thumb across the top edges 23 and 2~. The relatively small spacing between the 7.
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~, ~ ~g~ '' 12361 ridges 21 and 22 enables the user ~o engage both the ridges 21 and 22 as a result of this stroking of the top edges 23 and 24. The ridges 21 and 22 result in an excellent gripping surface even for a user with slippery fingers. The ridge 19 results in an excellent gri.pping surface on the opposing surface.
The user proceeds to separate the cop edges 23 and 24 from each other by spreading them apart to disengage the closure profiles 17 and 18 from each other.
The opening of the container 10 involves three operative forces which are of interest. In addition to the spreading force, the user exerts squeezing forces on the ridges 19, 21 and 22 to produce frictional ~, forces which will prevent the sidewalls 11 and 12 from slipping from the user's fingers.
In addition, the user exerts squeezing forces on the ridges 19, 21 and 22 to prevent the container 10 from slipping from the user's fingers when the container 10 is being loaded.
The ridges 19, 21, and 22 drastically reduce the squeezing forces needed by the user especially if the user has slippery fingers.
I wish it to be understood that I do not desire, to be limited to the exact details of construction shown and described, for obvious modifications w.ill occur to a person s~illed in the art.
Having described the invention, what I claim as new and desire to be secured by Letters Patent is as follows:

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Claims

WHAT IS CLAIMED:

1. In a container having a reclosable end, comprising flexible first and second sidewalls, and a closure fastening device including first and second closure profiles positioned on respective first and second sidewalls and operable for being occluded and disengaged with respect to each other to close and open said container, said first sidewall extending beyond the end edge of said second sidewall at said reclosable end; the improvement which comprises:
first and second ridges spaced apart from each other on the surface of said first sidewall and arranged substan-tially parallel to said first closure profile;
said first ridge being positioned near the end edge of said first sidewall, and said second ridge being positioned substantially opposite the end edge of said second sidewall when said closure profiles are occluded; and a third ridge on the surface of said second sidewall and arranged substantially parallel to said second closure profile;
said third ridge being positioned near the end edge of said second sidewall.

2. The container of claim 1 wherein said first and second ridges are on the inside surface of said first sidewall and said third ridge is on the inside surface of said second sidewall.

3. The container of claim 1 wherein said third ridge is positioned substantially opposite the region of said first sidewall bordered by said second ridge and said first closure profile when said closure profiles are occluded.

9.

4. The container of claim 1 wherein said sidewalls are transparent and said ridges are colored to be easily recognized visually with respect to said sidewalls.

5. The container of claim 1 wherein said sidewalls are translucent and said ridges are colored to be easily recognized visually with respect to said sidewalls.

6. The container of claim 1 wherein said sidewalls are opaque and said ridges are colored to be easily recognized visually with respect to said sidewalls.

7. The container of claim 1 wherein said ridges have polygonal cross sections.

8. The container of claim 1 wherein said ridges have trapezoidal cross sections.

9. The container of claim 1 wherein said ridges have rectangular cross sections.

10. The container of claim 1 wherein said ridges have triangular cross sections.

11. The container of claim 1 wherein said ridges have trapezoidal cross sections having a width at the respective connecting sidewall of from about 0.005 to about 0.100 inch, a width opposite the respective connecting sidewall of from about 0 to about 0.100 inch, and a height of from about 0.010 to about 0.050 inch.

12. The container of claim 4 wherein said ridges are colored yellow, and said sidewalls are transparent.

13. The container of claim 12 wherein one closure profile is blue and the other closure profile is transparent.

14. In a container having a reclosable end, comprising flexible first and second sidewalls, and a closure fastening 10.

device including first and second sidewalls and operable for being occluded and disengaged with respect to each other to close and open said container, said first sidewall extending beyond the end edge of said second sidewall at said reclosable end; the improve-ment which comprises:
first and second ridges spaced apart from each other on the inside surface of said first sidewall and arranged substantially parallel to said first closure profile;
said first ridge being positioned near the end edge of said first sidewall, and said second ridge being positioned substantially opposite the end edge of said second sidewall when said closure profiles are occluded; and a third ridge on the inside surface of said second sidewall and arranged substantially parallel to said second closure profile;
said third ridge being positioned near the end edge of said second sidewall.

11.