U.S. patent application number 10/729486 was filed with the patent office on 2005-01-20 for storing and dispensing container for product.
This patent application is currently assigned to Kimberly-Clark Worldwide, Inc.. Invention is credited to Buck, Frederick Allan, Huang, Yung Hsiang, Iverson, David S., Lesley, Paul M., Mahaffey, Cleary E., Velazquez, Herb Flores.
Application Number | 20050011906 10/729486 |
Document ID | / |
Family ID | 34068348 |
Filed Date | 2005-01-20 |
United States Patent
Application |
20050011906 |
Kind Code |
A1 |
Buck, Frederick Allan ; et
al. |
January 20, 2005 |
Storing and dispensing container for product
Abstract
A storing and dispensing container for product. The container
includes a flexible pouch for storing product. A rigid flip top,
having a lid connected to a flange by a hinge, is affixed to an
outer surface of the pouch at the top portion of the pouch
surrounding a removable portion of the pouch. The flange forms a
dispensing orifice through which the product can be dispensed when
the lid is opened. The lid is removably positionable to seal the
pouch at the outer surface when the lid is closed upon the
flange.
Inventors: |
Buck, Frederick Allan;
(Neenah, WI) ; Velazquez, Herb Flores; (Neenah,
WI) ; Mahaffey, Cleary E.; (Appleton, WI) ;
Huang, Yung Hsiang; (Appleton, WI) ; Lesley, Paul
M.; (Chicago, IL) ; Iverson, David S.;
(Chicago, IL) |
Correspondence
Address: |
KIMBERLY-CLARK WORLDWIDE, INC.
401 NORTH LAKE STREET
NEENAH
WI
54956
|
Assignee: |
Kimberly-Clark Worldwide,
Inc.
|
Family ID: |
34068348 |
Appl. No.: |
10/729486 |
Filed: |
December 5, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60487695 |
Jul 15, 2003 |
|
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|
Current U.S.
Class: |
221/64 ;
221/63 |
Current CPC
Class: |
B65D 75/5877 20130101;
B65D 83/0805 20130101; B65D 75/5833 20130101 |
Class at
Publication: |
221/064 ;
221/063 |
International
Class: |
B65H 001/00; B65D
083/00 |
Claims
What is claimed is:
1. A storing and dispensing container for product comprising: a
flexible pouch for storing product, the pouch comprising a bottom
portion with side portions adjoined to the bottom portion and each
side portion adjoined to an adjacent side portion and the side
portions extending away from the bottom portion, the side portions
also adjoined to a top portion with the top portion overlying the
bottom portion and being generally parallel to the bottom portion,
and the top portion including a removable portion which seals the
product within the pouch in a first condition and which allows
access to the product within the pouch in a second condition; a
rigid flip top comprising a lid connected to a flange by a hinge,
the flange being affixed to an outer surface of the pouch at the
top portion of the pouch such that the rigid flip top overlies the
removable portion of the pouch and the removable portion is
surrounded by the rigid flip top at the outer surface of the pouch;
the flange forming a dispensing orifice through which the product
can be dispensed when the lid is opened and the lid being removably
positonable to be closed to engage the flange and thereby seal the
pouch at the outer surface where the removable portion is
surrounded by the rigid flip top; and the lid including a latch
with an elongate first rib projecting horizontally therefrom and
the flange including a catch with an elongate second rib projecting
horizontally therefrom whereby the first and second ribs removably
engage each other in an interference fit to maintain the lid closed
and removably disengage each other when the lid is opened and
wherein at least one of the first and second ribs has a non-uniform
elongate cross-section.
2. The container of claim 1 wherein the non-uniform cross-section
comprises an angled elongate cross-section.
3. The container of claim 1 wherein the elongate first rib of the
latch projects inward relative to a perimeter of the lid in a
horizontal plane of the lid and the elongate second rib of the
catch projects outward relative to a perimeter of the flange in a
horizontal plane of the flange.
4. The container of claim 1 wherein the first rib has a non-uniform
elongate cross-section and the second rib has a uniform elongate
cross-section.
5. The container of claim 1 wherein the lid is defined by a
horizontal perimeter and includes an opening tab projecting
outwardly of the perimeter.
6. The container of claim 5 wherein at least 60% of the opening tab
is located on either side of a bisecting line located through the
width of the lid at a midpoint of the length.
7. A storing and dispensing container for product comprising: a
flexible pouch for storing product, the pouch comprising a bottom
portion with side portions adjoined to the bottom portion and each
side portion adjoined to an adjacent side portion and the side
portions extending away from the bottom portion, the side portions
also adjoined to a top portion with the top portion overlying the
bottom portion and being generally parallel to the bottom portion,
and the top portion including a removable portion which seals the
product within the pouch in a first condition and which allows
access to the product within the pouch in a second condition; a
rigid flip top comprising a lid connected to a flange by a hinge,
the flange being affixed to an outer surface of the pouch at the
top portion of the pouch such that the rigid flip top overlies the
removable portion of the pouch and the removable portion is
surrounded by the rigid flip top at the outer surface of the pouch;
the flange forming a dispensing orifice through which the product
can be dispensed when the lid-is opened and the lid being removably
positonable to be closed to engage the flange and thereby seal the
pouch at the outer surface where the removable portion is
surrounded by the rigid flip top; and the lid having a length and a
width with the length being greater than the width, the lid being
defined by a horizontal perimeter and an opening tab projecting
outwardly of the perimeter with at least 60% of the opening tab
being located on either side of a bisecting line located through
the width of the lid at a midpoint of the length of the lid.
8. The container of claim 7 wherein the horizontal perimeter of the
lid is defined by a substantially uniform simple geometric shape
except for the opening tab projecting outwardly of the
perimeter.
9. The container of claim 7 wherein the opening tab comprises a
pocket located between the opening tab and the outer surface
adjacent thereto.
10. The container of claim 7 wherein at least 60% of the opening
tab is also located on a non-hinge side of the bisecting line
located through the length of the lid at the midpoint of the
width.
11. A storing and dispensing container for product comprising: a
flexible pouch for storing product, the pouch comprising a bottom
portion with side portions adjoined to the bottom portion and each
side portion adjoined to an adjacent side portion and the side
portions extending away from the bottom portion, the side portions
also adjoined to a top portion with the top portion overlying the
bottom portion and being generally parallel to the bottom portion,
and the top portion including a removable portion which seals the
product within the pouch in a first condition and which allows
access to the product within the pouch in a second condition; a
rigid flip top comprising a lid connected to a flange by a hinge,
the flange being affixed to an outer surface of the pouch at the
top portion of the pouch such that the rigid flip top overlies the
removable portion of the pouch and the removable portion is
surrounded by the rigid flip top at the outer surface of the pouch;
the flange forming a dispensing orifice through which the product
can be dispensed when the lid is opened and the lid being removably
positonable to be closed to engage the flange and thereby seal the
pouch at the outer surface where the removable portion is
surrounded by the rigid flip top; and the hinge comprising a living
hinge, the living hinge including a central strap and a pair of
toggle straps with each toggle strap located on an opposite side of
the central strap whereby the living hinge enables the lid to move
throughout a first open position and wherein moving the lid past
the first open position requires overcoming a force created by the
central strap and the pair of toggle straps and when the force is
overcome the lid is maintained in a second open position wherein
the lid in the second open position is at an arc greater than the
arc of the lid in the first position.
12. The container of claim 11 wherein moving the lid from the
second open position to be closed requires the force be overcome in
a direction reverse that when moving the lid from the first open
position to the second open position.
13. The container of claim 11 wherein at least one toggle strap
includes a pair of channels with a first such channel located at a
first end of the strap adjacent the lid and a second such channel
located at a second end of the strap adjacent the flange.
14. The container of claim 11 wherein the entire hinge when the lid
is closed, including a thickness of the adjoining lid and flange
adjacent the hinge, has a thickness no more than about 4 cm.
15. The container of claim 14 wherein the thickness is no more than
about 3 cm
16. The container of claim 14 wherein the thickness is no more than
about 2 cm.
17. The container of claim 14 wherein the thickness is no more than
about 1 cm.
18. The container of claim 14 wherein the thickness is no more than
about 0.5 cm
19. The container of claim 11 wherein the lid has a first Rigidity
Value and the flange has a second Rigidity Value and wherein the
first Rigidity Value is greater than the second Rigidity Value.
20. A storing and dispensing container for product comprising: a
flexible pouch for storing product, the pouch comprising a bottom
portion with side portions adjoined to the bottom portion and each
side portion adjoined to an adjacent side portion and the side
portions extending away from the bottom portion, the side portions
also adjoined to a top portion with the top portion overlying the
bottom portion and being generally parallel to the bottom portion,
and the top portion including a removable portion which seals the
product within the pouch in a first condition and which allows
access to the product within the pouch in a second condition; a
rigid flip top comprising a lid connected to a flange by a hinge,
the flange being affixed to an outer surface of the pouch at the
top portion of the pouch such that the rigid flip top overlies the
removable portion of the pouch and the removable portion is
surrounded by the rigid flip top at the outer surface of the pouch;
the flange forming a dispensing orifice through which the product
can be dispensed when the lid is opened and the lid being removably
positonable to be closed to engage the flange and thereby seal the
pouch at the outer surface where the removable portion is
surrounded by the rigid flip top; and the lid has a first Rigidity
Value and the flange has a second Rigidity Value wherein the first
Rigidity Value is greater than the second Rigidity Value.
21. The container of claim 20 wherein the first Rigidity Value is
at least two times greater than the second Rigidity Value.
22. The container of claim 20 wherein the first Rigidity Value is
at least five times greater than the second Rigidity Value.
23. The container of claim 20 wherein the lid is defined by a
horizontal perimeter and includes an opening tab projecting
outwardly of the perimeter.
24. The container of claim 23 wherein at least 60% of the opening
tab is located on either side of a bisecting line located through
the width of the lid at a midpoint of the length.
Description
[0001] This application claims the benefit of U.S. Provisional
Application No. 60/487,695 filed on Jul. 15, 2003.
BACKGROUND OF THE INVENTION
[0002] There are a variety of storing and dispensing containers in
the market, particularly those for storing and dispensing wipe type
products. Wipe type products, or wipes, have been made from a
variety of materials which can be dry or wet when used. Wet wipes
can be moistened with a variety of suitable wiping solutions.
Typically, wet wipes have been stacked in a container in either a
folded or unfolded configuration. For example, containers of wet
wipes have been available wherein each of the wet wipes stacked in
the container has been arranged in a folded configuration such as a
c-folded, z-folded or quarter-folded configuration as are well
known to those skilled in the art. Sometimes the folded wet wipes
have also been interfolded with the wet wipes immediately above and
below in the stack of wet wipes. In an alternative configuration,
the wet wipes have been placed in the container in the form of a
continuous web of material which includes perforations to separate
the individual wet wipes and which is wound into a roll. Such wet
wipes have been used for baby wipes, hand wipes, household cleaning
wipes, industrial wipes and the like.
[0003] The conventional packages which contain wipes, have
typically been designed to be positioned on a flat surface such as
a countertop, table or the like. Such conventional packages have
generally provided a plastic container, tub or package which
provides a sealed environment for the wet wipes to ensure that they
do not become dirty or overly dry. Some of the conventional
packages have also been configured to provide one at a time
dispensing of each wet wipe which can be accomplished using a
single hand after the package has been opened. Such single handed,
one at a time dispensing is particularly desirable because the
other hand of the user or care giver is typically required to be
simultaneously used for other functions. For example, when changing
a diaper product on an infant, the care giver typically uses one
hand to hold and maintain the infant in a desired position while
the other hand is attempting to dispense a baby wipe to clean the
infant.
[0004] However, the dispensing of wipes from such conventional
containers for wipes has not been completely satisfactory. For
example, many conventional containers are not compact and easy to
transport while also being reliable and easy to store and dispense
wipes, in either a reach-in or pop-up format, in a same package
container. Further, the invention herein better enables such
containers to maximize the size of the dispensing opening while
still maintaining an easy opening lid, and optionally also
achieving a snap open hinge which allows consumers access to the
wipes for easier dispensing, particularly in a reach-in wipes
product format.
SUMMARY OF THE INVENTION
[0005] In response to the difficulties and problems discussed
above, for example, a new package for wipes that has improved
storage and dispensing, has improved compactness and reliability,
has been invented. The purposes and features of the present
invention will be set forth in and are apparent from the
description that follows, as well as will be learned by practice of
the invention. Additional features of the invention will be
realized and attained by the packages particularly pointed out in
the written description and claims hereof, as well as from the
appended drawings.
[0006] As used herein, "flexible" means a non-foamed polymeric
containing film with a thickness of about 250 micrometers or less
or a foamed polymeric containing film with a thickness of about
2000 micrometers or less.
[0007] As used herein, "rigid" means a level of stiffness commonly
associated with materials used to manufacture wet wipes tubs of
parts thereof. Numerically, these materials typically have a
flexural modulus (as measured in accordance with ASTM D790
"Standard Test Method for Flexural Properties of Unreinforced and
Reinforced Plastics and Electrical Insulating Materials") of about
100 Newtons per square millimeter or greater, more specifically
from about 1100 to about 1550 Newtons per square millimeter.
[0008] In one aspect, the invention provides a storing and
dispensing container for product. The container comprises a
flexible pouch for storing product. The pouch comprises a bottom
portion with side portions adjoined to the bottom portion and each
side portion adjoined to an adjacent side portion and the side
portions extending away from the bottom portion. The side portions
are also adjoined to a top portion with the top portion overlying
the bottom portion and being generally parallel to the bottom
portion. The top portion includes a removable portion which seals
the product within the pouch in a first condition and which allows
access to the product within the pouch in a second condition. The
container further comprises a rigid flip top comprising a lid
connected to a flange by a hinge. The flange is affixed to an outer
surface of the pouch at the top portion of the pouch such that the
rigid flip top overlies the removable portion of the pouch and the
removable portion is surrounded by the rigid flip top at the outer
surface of the pouch. The flange forms a dispensing orifice through
which the product can be dispensed when the lid is opened and the
lid is removably positonable to be closed to engage the flange and
thereby seal the pouch at the outer surface where the removable
portion is surrounded by the rigid flip top.
[0009] In another aspect, the invention provides, optionally or
additionally, the lid including a latch with an elongate first rib
projecting horizontally therefrom and the flange including a catch
with an elongate second rib projecting horizontally therefrom. In
this way, the first and second ribs removably engage each other in
an interference fit to maintain the lid closed, and removably
disengage each other when the lid is opened and wherein at least
one of the first and second ribs has a non-uniform elongate
cross-section.
[0010] In still another aspect, the invention provides, optionally
or additionally, the lid having a length and a width with the
length being greater than the width. The lid can be defined by a
horizontal perimeter and has an opening tab projecting outwardly of
the perimeter with at least 60% of the opening tab being located on
either side of a bisecting line located through the width of the
lid at a midpoint of the length of the lid.
[0011] In other aspects, the invention provides, optionally or
additionally, the hinge comprising a living hinge, the living hinge
including a central strap and a pair of toggle straps with each
toggle strap located on an opposite side of the central strap. In
this way, the living hinge enables the lid to move throughout a
first open position such that moving the lid past the first open
position requires overcoming a force created by the central strap
and the pair of toggle straps, and when the force is overcome the
lid is maintained in a second open position with the lid in the
second open position being at an arc greater than the arc of the
lid in the first position.
[0012] In yet other aspects, the invention provides, optionally or
additionally, the lid having a first Rigidity Value and the flange
having a second Rigidity Value, where the first Rigidity Value is
greater than the second Rigidity Value.
[0013] As with the other packages of the invention, the pouch
and/or rigid flip top can be transparent or translucent to provide
an indication of the quantity of wipes remaining in the container.
The pouch and/or rigid flip top can be made of various polymers,
copolymers, and mixtures, including, e.g., polyethylene,
polypropylene, polyester, polystyrene, and other polymers.
[0014] It is to be understood that both the foregoing general
description and the following detailed description are exemplary
and are intended to provide further explanation of the invention
claimed. The accompanying drawings, which are incorporated in and
constitute part of this specification, are included to illustrate
and provide a further understanding of the packages of the
invention. Together with the description, the drawings serve to
explain the various aspects of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be more fully understood and
further features will become apparent when reference is made to the
following detailed description of the invention and the
accompanying drawings. The drawings are merely representative and
are not intended to limit the scope of the claims. Like parts of
the packages depicted in the drawings are referred to by the same
reference numerals.
[0016] FIG. 1 representatively shows a perspective view of a
flexible pouch for product such as wipes, with a removable portion
shown in dotted lines sealing the product within the pouch.
[0017] FIG. 2 representatively shows a cross-sectional view of the
container for wipes illustrated in FIG. 1 with a stack of wipes
therein, taken along the line 2-2.
[0018] FIG. 3 representatively shows a perspective view of an
example of a container for wipes according to the present invention
as a user is about to move the lid from being closed to being
open.
[0019] FIG. 4 representatively shows a top view of an example of a
container for wipes according to the present invention.
[0020] FIG. 5 representatively shows an enlarged top view of the
rigid flip top, with the lid and the flange laid open flat to see
the inside of the rigid flip top (i.e., as would be seen if the lid
in FIG. 3 would be moved to a second open position, that is, a
fully open position relative to the container).
[0021] FIG. 6 representatively shows a bottom view of the rigid
flip top, with the lid and the flange laid open flat to see the
outside of the rigid flip top (i.e., as would be seen from
underneath if the lid in FIG. 3 would be moved to a second open
position, that is, a fully open position relative to the container,
and without the pouch connected to the flange).
[0022] FIG. 7 representatively shows a right side view (i.e., and
where the left side view is a mirror image thereof except for the
opening tab) of the rigid flip top in a fully open flat
orientation.
[0023] FIG. 8 shows an enlarged side view of hinge 56 seen between
the lid and flange of the rigid flip top in FIG. 7.
[0024] FIG. 9 representatively shows an enlarged view of the
circled portion 9 seen in FIG. 5.
[0025] FIG. 10 representatively shows an enlarged view of the
circled portion 10 seen in FIG. 5.
[0026] FIG. 11 representatively shows an enlarged cross-sectional
view of a portion of the latch of the lid seen in FIG. 10, taken
along the line 11-11.
[0027] FIG. 12 representatively shows an enlarged cross-sectional
view of a portion of the latch of the lid seen in FIG. 10, taken
along the line 12-12.
[0028] FIG. 13 representatively shows an enlarged cross-sectional
view of a portion of the rigid flip top seen in FIG. 3, taken along
the line 13-13, and is also an enlarged view of the circled portion
13 seen in FIG. 14.
[0029] FIG. 14 representatively shows a cross-sectional view of the
rigid flip top seen in FIG. 3, taken along the line 14-14.
[0030] FIG. 15 representatively shows a cross-sectional view of a
portion of the rigid flip top seen in FIG. 17, taken along the line
15-15.
[0031] FIG. 16 representatively shows an enlarged cross-sectional
view of the circled portion 16 seen in FIG. 14.
[0032] FIG. 17 representatively shows a top view of a rigid flip
top in accordance with the present invention.
[0033] FIG. 18 representatively shows equipment for conducting the
Rigidity Value test.
[0034] FIG. 19 shows an enlarged view of the probe seen in FIG.
18.
[0035] FIGS. 20-23 representatively show results from respective
parts of a rigid flip top made in accordance with the present
invention and tested according to the Rigidity Value test.
DETAILED DESCRIPTION OF THE INVENTION
[0036] The present invention is directed at solving problems
related to storing and dispensing product such as, wipes and wet
wipes, from containers. As representatively illustrated throughout
the figures, the present invention provides a storing and
dispensing container 20 for product 22. Product 22 could be a
variety of pliable type items, such as wipes, wet wipes or others
where single unit dispensing is desired. The container 20 generally
includes a flexible pouch 30 for storing product 22 and a rigid
flip top 50 for dispensing the product and then resealing the
container. The pouch includes a bottom portion 32 with side
portions 34 adjoined to the bottom portion and each side portion
adjoined to an adjacent side portion and the side portions
extending away from the bottom portion. As seen in the Figures, the
pouch is rectangular, however, it could be a variety of other
shapes as long as there is a bottom adjoined to at least one side
(e.g., the side being a cylinder). The side portions 34 are also
adjoined to a top portion 36 with the top portion overlying the
bottom portion. Advantageously, the top portion can be generally
parallel to the bottom portion, but need not be. The top portion 36
includes a removable portion 40 which seals the product within the
pouch in a first condition (as seen in FIG. 1, i.e., before the
product is dispensed the first time) and which allows access to the
product within the pouch in a second condition (i.e., when the
removable portion is removed and the rigid flip top 50 is in an
open condition (as would be seen in FIG. 5 were the shown rigid
flip top 50 affixed to the pouch 30 seen in FIGS. 1-4). Removable
portion 40 may be a perforated die cut oval (as seen in FIG. 1), a
scored material, of a variety of shapes, and can include a
conventional resealable label therewith. The use of "top," "bottom"
and "side(s)" herein only establishes positioning of the various
components relative to one or another and otherwise does not limit
the scope of the invention.
[0037] The rigid flip top 50 includes a lid 52 connected to a
flange 54 by a hinge 56, see for example, FIGS. 3-7. The flange is
affixed (e.g., as discussed further herein) to an outer surface 38
of the pouch at the top portion 36 of the pouch such that the rigid
flip top overlies the removable portion 40 of the pouch and the
removable portion is surrounded by the rigid flip top at the outer
surface of the pouch. The rigid flip top may be located partially
or entirely affixed to only the top portion 36, or a portion of it
may also be affixed to a side portion, as long as the latch 60 is
positioned adjacent the top portion. The flange 54 forms a
dispensing orifice 58 through which the product can be dispensed
when the lid is opened. The flange can include strengthening ribs
55 around the flange to stiffen the flange as desired. The lid 52
is removably positonable to be closed (e.g., as seen in FIGS. 3-4)
to engage the flange and thereby seal the pouch at the outer
surface where the removable portion is surrounded by the rigid flip
top, and in this way seal the pouch and product therein from the
environment outside the pouch after the removable portion 40 is
removed and no further wipes are desired during a particular
dispensing occasion. The lid can include an annular sealing ring 51
extending downwardly away from the inside of the lid and which is
sized to fit against an annular sealing ring 53 extending upwardly
away from the inside of the flange, to thereby assist in better
sealing the lid to the flange when the lid is closed.
[0038] Various additional features of the invention will now be
discussed. These features can be used individually or in
combination with some or all of those discussed herein, as desired
to take advantage of the invention in different ways. One of these
features concerns the lid 52 and the flange 54, see for example,
FIGS. 5 and 10-13. The lid can include a latch 60 with an elongate
first rib 62 projecting horizontally therefrom, and the flange can
include a catch 64 with an elongate second rib 66 projecting
horizontally therefrom. The first and second ribs 62 and 66,
respectively, can removably engage each other in an interference
fit to maintain the lid closed (e.g., as seen in FIG. 13) and
removably disengage each other when the lid is opened.
Advantageously, at least one of the first and second ribs 62 and
66, respectively, has a non-uniform elongate cross-section (i.e.,
the non-uniform cross-section being determined along the length of
the rib). Such non-uniformity is seen as one example in FIGS.
10-12. In this way, e.g., a gradual decreasing interference (i.e.,
due to thickness and/or amount of horizontal projection) of the rib
profile provides less material on one side of the latch (e.g., the
right side in FIG. 10) to thereby reduce the force needed to
overcome the interference fit relationship with the rib on the
catch. As seen in FIG. 10, approximately halfway along the length
of the latch, the rib 62 is of uniform elongate cross-section which
enables, if desired, an audible click to signal complete closure of
the lid upon the flange. Further in this regard, another noteworthy
advantage to such a non-uniform rib feature is a unique latch/catch
relationship that enables the latch to peel away from the catch as
the opening tab 74 flexes the lid toward the open position, rather
than having to overcome the entire latch/catch interference fit at
one time to disengage the two members.
[0039] The non-uniformity of the rib 62 and/or 66 could further be
defined as an angled (e.g., tapered) elongate cross-section, as
seen in detail in FIGS. 11-12. Alternatively, or additionally, the
elongate first rib of the latch can project inward (e.g., as seen
in FIG. 10) relative to a perimeter of the lid in a horizontal
plane of the lid and the elongate second rib of the catch can
project outward (e.g., as seen in FIG. 13) relative to a perimeter
of the flange in a horizontal plane of the flange. Still
alternatively, or additionally, the first rib can have a
non-uniform elongate cross-section (e.g., as seen in FIG. 10) and
the second rib can have a uniform elongate cross-section (i.e., as
would be seen with the rib in FIG. 10 if it had the same
cross-section seen in FIG. 11 for its entire length from end to
end).
[0040] Another of these features concerns the lid 52 and the
opening tab 74, see for example, FIGS. 3-5, 15 and 17. The "opening
tab" is defined herein as any portion of the lid that projects
radially out from the lid away from the sealing portion of the
rigid flip top and thereby enables a user to place at least their
finger tip(s) between the projecting portion and the flexible pouch
to assist in separating the lid from the flange when moving the lid
to the open position. The opening tab protrudes from the rigid flip
top 50 so that a user can more easily find it and have a more
identifiable leverage point to open the lid. By placing the opening
tab off-center (e.g., left or right of bisecting line 76-76, or
alternatively, a tab left and a second tab right of line 76-76),
and particularly at least 60%, and more advantageously at least
70%, at least 80%, at least 90%, and most advantageously 100%, of
such opening tab being so located, one is better able to maximize
the size of the dispensing orifice 58 for accessing the wipes and
facilitating dispensing. The size of the dispensing orifice is a
function of the area (width and length) of the wipes stack within
the pouch, minus manufacturing tolerances for producing the pouch
material, removable portion, wipes stack, and affixing the flange
to the pouch. If the opening tab 74 is placed in the center of the
rigid flip top similar to conventional packages, the size (i.e.,
dispensing area) of the dispensing orifice is disadvantageously
reduced by the length of the protrusion of the opening tab beyond
the perimeter of the lid in order to be able to keep the perimeter
of the rigid flip top inside the perimeter of the container, which
is needed for acceptable container manufacturing tolerances and
consumer acceptance (i.e., will not pop open inadvertently). Also,
and without being limited to a theory of operation, by placing the
opening tab off-center, for a given force applied to the tab, the
torque generated to open the lid will increase. As a result of such
increase, it can be easier (i.e., through less effort) to open the
lid.
[0041] Referring to FIG. 17, the lid is defined by a length 70 and
a width 72, where the length is defined as being greater than the
width (i.e., and the length and width are each determined as the
respective sides of the largest rectangle that can be formed around
the lid in a horizontal plane of the lid). If the length and width
are equal, then the dimension of either is used herein as the
length and width. The lid can be further defined by a horizontal
perimeter and the opening tab 74 projecting outwardly of the
perimeter. The opening tab (i.e., at least the leverage point
created by the opening tab) can be advantageously located on either
side of a bisecting line located through the width of the lid at a
midpoint of the length. As seen in FIG. 17, such a bisecting line
for the lid 52 would be line 76-76 located through the width of the
lid at the midpoint of the length. Generally, for lids of other
shapes the bisecting line would be determined by placing the
bisecting line perpendicular to the length of the lid (as length is
defined above) at the midpoint of the length. More advantageously,
the opening tab (i.e., at least the leverage point created by the
opening tab) can additionally be located on the non-hinge side of a
bisecting line located through the length of the lid at a midpoint
of the width. As seen in FIG. 17, such a bisecting line for the lid
52 would be line 78-78 located through the length of the lid at the
midpoint of the width. Generally, for lids of other shapes the
bisecting line would be determined by placing the bisecting line
perpendicular to the width of the lid at the midpoint of the width.
Alternatively, or additionally, the opening tab 74 can include a
pocket 80 (e.g., FIG. 15) located between the opening tab and the
outer surface adjacent thereto, which aids a user in grasping the
flange when opening the same. Alternatively, or additionally, the
lid may be of a substantially uniform simple geometric shape (e.g.,
circle, oval, triangle, square, rectangle, pentagon, hexagon,
septagon, etc.) except for the opening tab 74 projecting outwardly
of the perimeter.
[0042] Another of these features concerns the hinge 56, see for
example, FIGS. 5-9. Often times it can be desirable to have a
snap-open hinge. The hinge can be a living hinge, where "living
hinge" is defined herein to mean a hinge formed integrally with the
members it is between. As seen in the figures, for example, such
members are the lid 52 and the flange 54. The hinge can include a
central strap 92 and a pair of toggle straps 94, with each toggle
strap located on an opposite side of the central strap.
Advantageously, the hinge enables the lid to move throughout a
first open position (e.g., from about 0 degrees defined relative to
a horizontal plane, to at least about 90 degrees defined relative
to the same horizontal plane). Then, moving the lid past the first
open position requires overcoming a force (i.e., a stress release
point anywhere from about 90 degrees defined relative to the same
horizontal plane to about 180 degrees defined relative to the same
horizontal plane) created by the central strap and the pair of
toggle straps, and when the force is overcome the lid is maintained
in a second open position (i.e., anywhere past the stress release
point, e.g., about 135 degrees relative to the same horizontal
plane which would then allow the lid to further open about another
30 degrees) and thereby the lid in the second open position is at
an arc greater than the arc of the lid in the first open position.
To move the lid from the second open position to be closed requires
the force be overcome in a direction reverse that when moving the
lid from the first open position to the second open position.
[0043] Without being limited to a theory of understanding, such
snap-open feature which defines the first and second open
positions, is believed to be achieved as follows, see, for example,
FIGS. 7-9. The central strap 92 creates a pivot axis midway between
its ends connected to the lid and the flange, and as such acts very
much like a mechanical hinge. The toggle straps 94 are located on
either side of the central strap and are located in a different
horizontal plane than the central strap (e.g., seen in FIG. 8 where
the central strap is in a horizontal plane below a horizontal plane
containing the toggle straps) By nature of the rigid flip top's
elliptical geometry, the toggle straps span a greater distance than
the living hinge and from a side view when the lid is closed, the
toggle straps are positioned further outside the perimeter of the
rigid flip top than the central strap. As such, when the lid is
closed the toggle straps are under mild compression. Once the lid
is opened, the toggle straps' horizontal pivot axis moves toward
the central strap's horizontal pivot axis. As this happens, the
toggle straps are under increased tension and stretch until the
toggle straps' horizontal pivot axis moves past the central strap's
horizontal pivot axis and the toggle straps' horizontal pivot axis
moves into a relaxed, as-originally-formed position. This movement
produces a spring/snap action as the tension on the toggle straps
increases, peaks and then rapidly decreases through the range of
movement from the lid being closed to being fully opened.
[0044] More particularly, the hinge can be defined where at least
one toggle strap includes a pair of channels with a first such
channel 96 located at a first end of the strap adjacent the lid and
a second such channel 98 located at a second end of the strap
adjacent the flange. In this way, the toggle straps pivot at their
ends as opposed to in their middle like the central strap, which
can be further advantageous to the snap-open feature. Yet
alternatively, or additionally, the entire hinge when the lid is
closed, including a thickness of the adjoining lid and flange
adjacent the hinge, can have a thickness no more than, and in order
of increasing advantage: about 4 cm, about 3 cm, about 2 cm, about
1 cm, or about 0.5 cm.
[0045] Another of these features concerns a relationship of the lid
52 and the flange 54, see for example, FIGS. 5 and 18-23. This
feature can be particularly advantageous in combination with the
snap-open feature, because the rigidity of the lid and the flange
help contribute to the reliability of the snap-open feature
especially since the rigid flip top is affixed to a flexible
material such as that forming the pouch. Also, additionally or
alternatively, and without being limited to a theory of operation,
the rigidity of the lid and flange, and particularly when the
flange is less rigid than the lid, may aid in better maintaining
good adhesion between the flange and the flexible pouch to better
prevent peeling of the flange away from the flexible pouch when
opening the rigid flip top. In this regard, the lid can have a
first Rigidity Value (as defined herein) and the flange can have a
second Rigidity Value, where the first Rigidity Value is greater
than the second Rigidity Value. The first Rigidity Value may be
that of the lid in either a length or width orientation, and the
second Rigidity Value may be that of the flange in either a length
or width orientation. In any of these cases, it is advantageous
that the first Rigidity Value in at least one of the dimensions of
lid's length or width be greater than the second Rigidity Value in
at least one of the dimensions of the flange's length or width.
Additionally or alternatively, it may be advantageous that, and in
order of increasing advantage, the first Rigidity Value may be at
least two times greater than the second Rigidity Value or at least
three times greater than the second Rigidity Value or at least four
times, five times or six times greater than the second Rigidity
Value. The rigidity of the flange and the lid is contributed to by,
for example, the type of material used, the thickness(es) of the
component, the component's proportion of solid area to total area
(i.e., including spaces and holes), the configuration of the
component, and others known to those of skill in the art.
[0046] Rigidity Value Test Method (see, e.g., FIG. 18-23)
[0047] Sample Preparation, in the order as follows: Unless stated
differently, all testing is done under TAPPI standard conditions.
Separate the rigid flip top into its two pieces at the center point
of the hinge between the lid and the flange, without materially
changing the functional ability of the rigid flip top components as
they would be used before being separated. Separating could be with
a scissors, knife, or saw, whichever tool, or another that enables
separating the lid from the flange without materially damaging
either of the components. With reference to FIG. 18, test sample
100, for example a lid, is secured to the L-shape holder 200 at a
fixed point 150 in such a manner (e.g., use of a screw, clip, etc.)
to prevent movement of the test sample relative to the fixed point
except in the vertical direction as caused by the test probe and
all this so as to not materially change the functional ability of
the rigid flip top component as it would be used before being so
secured. A small screw hole (no more than {fraction (1/8)} inch in
diameter) and fitted screw may be used to so secure the test
sample. The fixed point is located in the range of 5% to 10% inside
the perimeter of the sample when determining the Rigidity Value
relative to the width of the sample. The fixed point is located in
the range of 3% to 7% inside the perimeter of the sample when
determining the Rigidity Value relative to the length of the
sample. The distance between the fixed point 150 and the inside
edge 152 of the L-shaped holder 200 is 5 mm. The sample, when a
flange, should be oriented in a facing upward direction relative to
the equipment seen in FIG. 18, where the upward face of the sample
is the one facing away from the flexible pouch when the rigid flip
top is secured to the flexible pouch for use. The sample, when a
lid, should be oriented in a facing downward direction relative to
the equipment seen in FIG. 18, where the downward face of the
sample is the one facing towards the flexible pouch when the rigid
flip top is secured to the flexible pouch for use and the lid is in
the closed position.
[0048] Test Procedure, in the order as follows: The test can be
carried out on a standard tensile tester such as an MTS Sintech 1/G
test machine with TestWorks 4.07B software, where MTS is known as
MTS Systems Corporation, 14000 Technology Drive, Eden Prairie,
Minn. 55344-2290. With reference to FIG. 18, the L-shape holder 200
is clamped in the clamping jaw 300 of the tester and the test
sample 100 is perpendicular to the probe 500 (i.e., in a horizontal
plane relative thereto). With reference to FIG. 19, the probe 500,
made of solid aluminum, has a uniform diameter d of 1.27 cm, a
length A of 11.43 cm, and a spherically rounded tip that is smooth
to the touch. The probe has a threaded portion 520 having a length
B of 1.0 cm. The threaded portion 520 is adapted to screw into a 25
Newton Load Cell 400. The end of probe 500 opposite threaded
portion 520 is rounded with a 0.635 cm radius. The center of the
probe 500 is aligned a distance L of 5 mm inward from the edge of
test sample 100 opposite the fixed point, as shown in FIG. 18. The
probe 500 is then lowered until it touches the test sample 100 with
a force of 1.5 grams. This establishes the starting point of the
test. The cross head speed of the probe 500 is set to 0.2 inches
per minute. The probe 500 is activated so that it moves downward at
a speed of 0.2 inches per minute. The probe 500 is stopped after it
has traveled a distance of 10 mm downward, i.e., as measured from
the starting point of the test. For each run of the test, the
peak-slope of the load versus deflection curve over the 10 mm
distance is recorded on a computer using the TestWorks Version
4.07B software program. With the sample oriented to determine its
width dimension Rigidity Value (i.e., the probe and fixed point
being at opposite edges of the sample along bisecting line 76-76),
the Sample Preparation and Test Procedure is repeated for a total
of 5 new samples of the same part of the rigid flip top (i.e.,
testing the same part of the rigid flip top each time but doing so
with a new sample, e.g., flange or lid respectively, for each of
the 5 repeats) and the combined results are averaged to determine
the peak-slope of the load versus deflection curves over the 10 mm
distance for the five tested samples. With the sample oriented to
determine its length dimension Rigidity Value (i.e., the probe and
fixed point being at opposite edges of the sample along bisecting
line 78-78), the Sample Preparation and Test Procedure is
completed, using the steps above.
[0049] Results: A load versus deflection curve for a flange, taken
relative to its width, is shown in FIG. 20. Point B represents the
beginning of the data collection. Point M represents the location
where the first 20% of all data points in the test are collected,
i.e. the total data points between points B and M represent the
first 20% of all the data points collected during the test. Then
"peak-slope" as used herein is defined by the slope of line BM. The
peak-slope in this example, and thus the Rigidity Value of the
flange in the width dimension, is 4.3 grams force per millimeter
(gf/mm). A load versus deflection curve for a flange, taken
relative to its length, is shown in FIG. 21. The peak-slope in this
example, and thus the Rigidity Value of the flange in the length
dimension, is 2.3 gf/mm. A load versus deflection curve for a lid,
taken relative to its width, is shown in FIG. 22. The peak-slope in
this example, and thus the Rigidity Value of the lid in the width
dimension, is 26.5 gf/mm. The load versus deflection curve for a
lid, taken relative to its length, is shown in FIG. 23. The
peak-slope in this example, and thus the Rigidity Value of the lid
in the length dimension, is 11.0 gf/mm force per millimeter (gf/mm)
This concludes the Rigidity Value test method.
[0050] As shown in FIGS. 20-23, e.g., the peak-slope of the lid is
greater than that for the flange, even when comparing the length
orientation to the width or length orientations of the flange. For
example, using this Rigidity Value Test Method and a rigid flip top
in accordance with the invention, the peak-slope for the lid in its
width orientation may be 26.5 gf/mm, while the peak-slope for the
flange in its width orientation may be 4.3 gf/mm. This indicates
that the Rigidity Value of the lid is more than 6 times the
Rigidity Value of the flange.
[0051] The "affixed" relationship of the rigid flip top to the
pouch can be by various mechanical and chemical methods known in
the art, including, but not limited to, use of glue or other
bonding material, thermal bonding or welding, ultrasonic bonding or
welding, or other joining methods as long as they create a
permanent joined relationship between the pouch and the rigid flip
top. The rigid flip top can be made by a variety of conventional
techniques, including for example, injection molding, made from
polypropylene, and/or being a single piece with a living hinge.
[0052] The pouch of the present invention can be made from various
materials and in various configurations. By way of example without
limitation, reference is made to the Figures for some of these. The
pouch can be made of polyester film laminated to polyethylene film.
The polyester film can be reverse printed, so the printing is
between the two film layers. Alternatively, a single-ply surface
printed film can be used. A single-ply film can be composed of one
or more layers of polyolefin, and, e.g., formed in a coextrusion.
The flexible pouch with product therein can be formed by various
form, fill and seal techniques known to those of skill in the
art.
[0053] The product, e.g., wipes or wet wipes, can be arranged in
the pouch in any manner which provides convenient and reliable one
at a time dispensing and which assists the wipes in not becoming
dirty and/or overly dry. For example, the wipes may be arranged in
a dispenser or container as a plurality of individual sheets
arranged in a stacked configuration to provide a stack of wipes
which may or may not be individually folded. The wipes may be
individual wipes which are folded in a c-fold, z-fold, quarter fold
or other zigzag fold or interfolded or non-interfolded
configurations as are known to those skilled in the art. The
product 22 may include a plurality of wipes stacked one on top of
each other in a non-interfolded configuration, for "reach-in"
dispensing. For such a non-interfolded wipe, each wipe is folded
onto itself with no portion of another wipe being positioned
between or underneath any portion of the folds of the adjacent
wipe(s). These configurations for wipes, as well as those discussed
herein, may be provided by means known to those skilled in the
art.
[0054] Alternatively, the individual wipes can be interfolded or in
other ways related such that the leading and trailing end edges of
successive wipes in the stacked configuration overlap, for "pop-up"
dispensing. In such a configuration, the leading end edge of the
trailing wipe is loosened from the stack by the trailing end edge
of the leading wipe as the leading wipe is removed by the user. The
wipes can be interfolded to facilitate such dispensing by means
known to those skilled in the art.
[0055] Yet alternatively, the wipes can be arranged in the pouch as
a continuous web of interconnected wipes which are folded in an
accordion-like stacked configuration or a roll. The individual
wipes can be connected together along lines of frangibility, such
as lines of perforations, to ensure that the trailing wipe is in
position for grasping by the user after the leading wipe is
removed. For example, the wipes can be provided by a continuous web
of material which has a series of lines of frangibility extending
across the width of the web. The portion of the web of material
between successive lines of frangibility provides each individual
wipe. The lines of frangibility can be provided by means known to
those skilled in the art such as perforations, indentations or cuts
in the web of material. For example, the lines of frangibility or
perforations can be provided in the web of material by passing the
web of material between a die cutter roll and anvil roll. After the
lines of frangibility have been incorporated into the web of
material, the web can then be arranged in a stacked configuration
for easy insertion into the pouch during formation thereof.
[0056] The container of the present invention can include any
suitable number of individual wipes depending upon the desired
packaging and end use. For example, the container can be configured
to include a stack of wipes which can include at least about 5
wipes and desirably from about 8 to about 320 individually wipes,
and more desirably from about 16 to about 64 wipes. The size and
shape of the stack of wipes is dependent upon the size and shape of
the container and vice versa.
[0057] Each wipe is generally rectangular in shape and defines a
pair of opposite side edges and a pair of opposite end edges which
can be referred to as a leading end edge and a trailing end edge.
The leading end edge of each wet wipe is typically positioned in
the pouch under the dispensing orifice to be grasped by a user to
facilitate a removal of the wipe from the container.
[0058] Materials suitable for the wipes of the present invention
are well known to those skilled in the art. For wet wipes, these
can be made from any material suitable for use as a moist wipe,
including meltblown, coform, air-laid, bonded-carded web materials,
hydroentangled materials, high wet-strength tissue and the like and
can comprise synthetic or natural fibers or combinations thereof.
The wipes of the different aspects of the present invention can
contain a liquid which can be any solution which can be absorbed
into the wipes, thus making them "wet wipes." The liquid contained
within the wet wipes can include any suitable components which
provide the desired wiping properties. For example, the components
can include water, emollients, surfactants, preservatives,
chelating agents, pH buffers, fragrances or combinations thereof.
The liquid can also contain lotions, ointments and/or medicaments.
The amount of liquid contained within each wet wipe can vary
depending upon the type of material being used to provide the wet
wipe, the type of liquid being used, the type of container being
used to store the stack of wet wipes, and the desired end use of
the wet wipe. Generally, each wet wipe can contain from about 150
to about 600 weight percent and desirably from about 200 to about
400 weight percent liquid based on the dry weight of the wipe for
improved wiping.
[0059] Accordingly, the different aspects and features of the
present invention can provide containers for wipes which, when
compared to conventional containers for wipes, provide improved
same container storage and dispensing. Such containers are
particularly useful for dispensing baby wipes since the caregiver
typically only has one hand free during the diapering process.
Thus, the packages for wipes, e.g., wet wipes, of the present
invention are reliably and easily opened by one hand of the user or
care giver for improved convenience and personal hygiene.
Additionally, the packages of the invention can provide better,
easier wipe dispensing.
[0060] While the invention has been described in detail with
respect to the specific aspects thereof, it will be appreciated
that those skilled in the art, upon attaining an understanding of
the foregoing, may readily conceive of alterations to, variations
of, and equivalents to these aspects. Accordingly, the scope of the
present invention should be assessed as that of the appended
claims.
* * * * *