U.S. patent number 3,904,074 [Application Number 05/501,151] was granted by the patent office on 1975-09-09 for packaging system.
This patent grant is currently assigned to Scott Paper Company. Invention is credited to Louis S. Hoffman, Harry Spruyt.
United States Patent |
3,904,074 |
Hoffman , et al. |
September 9, 1975 |
Packaging system
Abstract
A packaging system includes a container body having an upper lip
defining an opening into an interior compartment thereof, and a
unitary, snap-on closure attached to the container body. The
closure has a top wall overlying the opening into the interior
compartment, a downwardly extending peripheral skirt overlying the
outer walls of the container body exteriorly of the internal
compartment, and an integral flexible transverse hinge intermediate
front and rear ends thereof to divide the closure into a rear
stationary cover portion and a forward movable door portion. The
integral hinge includes grooves or thinned regions in the closure
peripheral skirt. The cover portion has inwardly directed
projections and rearwardly facing shoulders integrally formed with
the skirt for cooperating with downwardly facing projections and
forwardly facing shoulders, respectively, of the container body to
retain the cover portion on the container body when the door
portion of the closure is in either an open position permitting
access to the interior compartment, or a closed position sealing
the opening into the interior compartment. In a preferred
embodiment of the invention a substantially flat, moisture
impervious sheet overlies the opening into the interior compartment
of the container body and is secured to the upper lip thereof.
Inventors: |
Hoffman; Louis S. (Morristown,
NJ), Spruyt; Harry (New York, NY) |
Assignee: |
Scott Paper Company
(Philadelphia, PA)
|
Family
ID: |
27017358 |
Appl.
No.: |
05/501,151 |
Filed: |
August 28, 1974 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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401235 |
Sep 27, 1973 |
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Current U.S.
Class: |
220/258.3;
220/788; 220/835 |
Current CPC
Class: |
B65D
43/161 (20130101); B65D 51/20 (20130101); B65D
43/0212 (20130101); B65D 2543/00527 (20130101); B65D
2543/00231 (20130101); B65D 2543/00194 (20130101); B65D
2543/00537 (20130101); B65D 2543/00296 (20130101); B65D
2251/105 (20130101); B65D 2543/00574 (20130101); B65D
2543/00759 (20130101); B65D 2543/00648 (20130101); B65D
2251/0021 (20130101); B65D 2543/00805 (20130101); B65D
2543/00694 (20130101); B65D 2251/0093 (20130101) |
Current International
Class: |
B65D
43/02 (20060101); B65D 43/16 (20060101); B65D
51/18 (20060101); B65D 51/20 (20060101); B65D
041/04 () |
Field of
Search: |
;220/258,306,339 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Attorney, Agent or Firm: Faigus; Martin L. Foley; William
J.
Parent Case Text
RELATED APPLICATIONS
This application is a continuation-in-part of U.S. application Ser.
No. 401,235, filed Sept. 27, 1973, and entitled, PACKAGING SYSTEM.
Claims
Having described our invention we claim:
1. A packaging system comprising:
A. a container body including a bottom wall, peripheral walls
extending upwardly from said bottom wall and terminating in an
upper lip which defines an opening into an interior compartment of
said body, peripheral downwardly facing shoulder means adjacent
said lip and disposed exteriorly of said interior compartment, and
transversely spaced, forwardly facing shoulders adjacent said lip
and disposed exteriorly of said inner compartment intermediate
opposed ends of the said body;
B. a unitary, snap-on closure including a top wall overlying the
opening into the interior compartment of the container body, a
peripheral skirt overlying outer surfaces of the peripheral walls,
and an integral flexible transverse hinge intermediate front and
rear ends of said closure to divide said closure into a stationary
cover portion and a movable door portion;
C. said stationary cover portion including inwardly directed
projection means in closely positioned underlying relationship with
the downwardly facing shoulder means of said container body, and
transversely spaced, rearwardly facing shoulders in closely
positioned overlying relationship with the transversely spaced,
forwardly facing shoulders of said container body, whereby said
closure will be retained on the container body when the door
portion of the closure is in either an open position permitting
access to the interior compartment of the container body, or a
closed position sealing the open end of said container body.
2. The packaging system according to claim 1, wherein a portion of
the inwardly directed projection means of the cover portion is
positioned closely adjacent each rearwardly facing shoulder of said
cover portion, said rearwardly facing shoulders being disposed
closely adjacent to the transverse hinge.
3. The packaging system according to claim 1, wherein said closure
is of a one-piece construction.
4. The packaging system according to claim 1, including a
moisture-impervious sheet overlying the opening of the container
body and disposed between the container body and the closure.
5. The packaging system according to claim 4, including cooperable
latch means on said container body and door portion of said closure
for aiding in maintaining the door portion in its closed position.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a packaging system of the type having a
container body and a separate snap-on closure, and more
specifically, to a packaging system in which the closure is of a
unitary construction having a thinned region intermediate front and
rear ends thereof to provide a flexible integral hinge dividing the
closure into a stationary cover portion adapted to be secured to
the container body and a movable door portion adapted to permit
access to an interior compartment of the container body.
2. Description of the Prior Art
Packaging systems including a container body, and a unitary snap-on
closure having an integrally formed flexible hinge line
intermediate front and rear ends thereof are known in the prior
art. Such packaging systems are shown in the following patents:
U.S. Pat. No. 3,412,890, issued to Rich; U.S. Pat. No. 3,417,897,
issued to Johnson; U.S. Pat. No. 3,421,654, issued to Hexel and
French Patent No. 1,319,370, issued to Livarek.
In all of the above patents the flexible hinge line of the closure
separates the closure into a stationary cover portion and a movable
door portion. The stationary cover portion includes inner and outer
peripheral skirts for receiving the upper edge of the container
body therebetween to thereby interlock the cover portion and the
container body to prevent relative movement therebetween.
For some applications, it is highly desirable to secure a moisture
impervious film, or sheet over the open end of the container body
between the closure and container body. For example, in a packaging
system including premoistened wet wipers it is extremely important
that the packaging system be moisture impervious to prevent the
escape of moisture from the wet wipers during the relatively long
shelf life (i.e., six months to two years) required for such
products. For this, and other similar applications, the use of a
moisture impervious film or sheet, as described above, is highly
desirable. However, when the closure includes a peripheral skirt
which projects into the opening of the container body such a
moisture impervious sheet normally cannot be used since the inner
skirt would perforate or otherwise tear the sheet.
SUMMARY OF THE INVENTION
This invention relates to a packaging system employing a unique
structural relationship of elements between a container body and a
unitary, snap-on closure which eliminates the need for an internal
peripheral skirt on the closure extending into an interior
compartment of the container body. The container body in
applicant's invention includes a bottom wall and peripheral walls
extending upwardly from said bottom wall and termintaing in an
upper lip which defines an opening into the interior compartment of
the body. A peripheral, downwardly facing shoulder is integrally
formed on the container body closely adjacent the lip and
exteriorly of the inner compartment. The container further includes
forwardly facing shoulders on opposite sides thereof and
intermediate the front and rear ends thereof, and these forwardly
facing shoulders are also disposed exteriorly of the interior
compartment of the container body.
The unitary, snap-on closure of this invention can be of either a
one-piece, or two-piece construction including a top wall overlying
the opening into the interior compartment of the container body, a
downwardly extending peripheral skirt overlying the outer surfaces
of the peripheral walls of said container body, and an integral
flexible transverse hinge intermediate front and rear ends of said
closure to divide the closure into a rear stationary cover portion
and a forward movable door portion. The unitary closure of this
invention does not include internal skirts which project into the
interior compartment of the container body.
In one embodiment of this invention, the unitary closure is of a
one-piece construction with the top wall integrally formed with the
peripheral skirt. In an alternative embodiment, the unitary closure
is of a two-piece construction including a closure frame, and a
flexible, substantially flat moisture-impermeable sheet. The
closure frame is of a one-piece construction including a downwardly
extending peripheral skirt and an inwardly facing peripheral lip
defining a top wall portion of the unitary closure. The flexible,
moisture-impermeable sheet is adhered to the top wall portion of
the closure frame, whereby the top wall portion of said closure
frame and the flexible sheet constitute the entire top wall of the
unitary closure.
The stationary cover portion of the unitary closures of this
invention include inwardly directed projections in closely
positioned underlying relationship with the downwardly facing
shoulder of the container body; and transversely spaced, rearwardly
facing shoulders in closely positioned overlying relationship with
the transversely spaced, forwardly facing shoulders of the
container body, whereby the cover portion of the closures will be
retained on the container body when the door portion of the
closures is in either an open position permitting access to the
interior compartment of the container body or a closed position
sealing the open end of the container body.
In the most preferred embodiment of applicant's invention, a
substantially flat, moisture impervious sheet is secured to the
container body in overlying relationship with the opening thereof,
and is disposed between the closure and the container body. Since
the closure does not include any internal peripheral skirts
projecting into the interior compartment of the container body, the
substantially flat, moisture impervious sheet can be utilized in
the packaging system of this invention. The moisture impervious
sheet is removed from the container body prior to use.
In the most preferred embodiment of this invention the movable door
portion and container body have easily releasable cooperable latch
means for aiding in maintaining the door portion in its closed
position, and for permitting easy release for opening the door
portion to establish access to the interior compartment of the
container body.
Other objects and advantages of this invention will become apparent
upon reading the detailed description which follows, taken in
conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded isometric view of the packaging system of
this invention;
FIG. 2 is a sectional view taken along line 2--2 of FIG. 1 with the
components of the packaging system assembled;
FIG. 3 is a sectional view taken along line 3--3 of FIG. 2;
FIG. 4 is a sectional view taken along line 4--4 of FIG. 2;
FIG. 5 is an enlarged view of the blocked portion of FIG. 3
indicated at 5;
FIG. 6 is an exploded isometric view of an alternative embodiment
of a unitary closure of the packaging system of this invention;
and
FIG. 7 is a sectional view taken along line 7--7 of FIG. 6 with the
components of the unitary closure assembled and attached to the
container body.
DESCRIPTION OF THE PREFERRED EMBODIMENT
This invention relates to a packaging system 10 which is
substantially moisture impervious. This packaging system 10 finds
its most significant applications for retaining articles therein
which would be damaged by either the entrance of moisture into the
packaging system or the escape of moisture from the packaging
system. One specific application of the present invention is in the
packaging of premoistened fibrous webs which can be employed as
wipers for many applications. For example, such premoistened wipers
are popular for cleaning many parts of the human body, such as the
perineal region, arms, hands, etc.
Referring to FIG. 1, a packaging system 10 of this invention
includes a container body 12, and a unitary, snap-on closure 14 of
a one-piece construction. In a preferred embodiment of this
invention, a substantially flat, moisture-impervious sheet 16 is
positioned in overlying relationship with the open end of the
container body 12 and is secured to an upper lip 18 thereof between
the closure 14 and the container body 12. This moisture-impervious
sheet 16 is secured to the container body 12 after articles, such
as pre-moistened wipers 19, are placed therein. The sheet 16
maintains a moisture-impervious condition within the container body
12 to thereby establish a long shelf life.
Both the container body 12 and unitary, snap-on closure 14 can be
made from well-known plastic materials, such as polyurethane,
polystyrene and polypropylene. The moisture-impervious sheet 16 can
be aluminum foil, plastic materials, laminates of paper, aluminum
foil and plastic materials or any other suitable material.
Referring to FIG. 1, the container body 12 includes a bottom wall
20, and peripheral end walls 22 and peripheral side walls 24
upstanding from said bottom wall and terminating in the upper lip
18 which defines an opening into an interior compartment 26. The
container body 12 includes a peripheral skirt 28 integrally formed
with the upper lip 18 for defining a downwardly facing peripheral
shoulder 30 disposed exteriorly of the interior compartment 26
(FIGS. 1, 2 and 3). The peripheral skirt 28 has a stepped
configuration overlying each side wall 24 to form forwardly facing
shoulders 32 on opposite sides of the container body 12
intermediate the end walls 22 thereof (FIGS. 1, 3 and 5).
Referring to FIGS. 1-3, the closure 14 includes a top wall 34, a
downwardly extending peripheral skirt 36 extending around the outer
periphery of said top wall, and an integral flexible transverse
hinge 38 intermediate front and rear ends 33 and 35, respectively,
of the closure 14. The flexible transverse hinge 38 extends for the
full transverse extent of the closure 14 and includes a thinned
transverse zone 39 in the top wall 34 and grooves 40 interrupting
the continuity of the skirt 36 in alignment with said transverse
zone. Alternatively the skirt 36 can be provided with thinned
sections, in place of grooves 40, in transverse alignment with the
thinned transverse zone 39. The closure 14 can be pivoted along the
hinge 38. When thinned sections are provided in the skirt 36 they
will separate at such sections to permit the pivotal action to take
place. The integral hinge 38 divides the closure 14 into a cover
portion 42 which is adapted to remain stationary with respect to
the container body 12 when the closure is snapped onto the
container body, and a movable door portion 44 which is movable
about the hinge 38 to permit access to articles retained within the
interior compartment 26, and to permit subsequent reclosure of the
packaging system 10 (FIGS. 1 and 2).
Referring to FIGS. 3 and 5, the cover portion 42 includes unique
structure for cooperating with the container body 12 to retain said
cover portion in an immobile condition when the closure 14 is
attached to said container body. Specifically, the cover portion 42
includes an inwardly directed end projection 46 and inwardly
directed side projections 48 in closely positioned, underlying
relationship with the downwardly facing shoulder 30 of the
container body 12. Preferably, the inwardly directed projections 46
and 48 are formed integrally with the lower margin of the outer
peripheral skirt 36 of the closure. The cover portion 42 further
includes inturned tabs 50 providing transversely spaced, rearwardly
facing shoulders 52 in closely positioned overlying relationship
with the transversely spaced forwardly facing shoulders 32 of the
container body 12. Preferably, these inturned tabs 50 are
integrally formed with the peripheral skirt 36 of the closure 14
closely adjacent the integral hinge 38. The side projections 48 are
closely adjacent the rearwardly facing shoulders 52 to provide
excellent captive engagement of the container body 12 closely
adjacent the integral hinge 38 to facilitate the opening of the
closure 14 along said hinge without separating the closure from the
container body. The cooperative relationship of the inwardly
directed projections 46 and 48 of the closure 14 with the
downwardly facing peripheral shoulder 30 of the container body 12
prevents the closure 14 from being inadvertently lifted off of the
container body 12 in a direction normal to the opening into the
interior compartment 26 thereof. The cooperative relationship
between the forwardly facing shoulders 32 of the container body 12
and the rearwardly facing shoulders 52 of the closure 14 prevents
the closure from sliding off the rear of the container body when
the door portion 44 is in an open position.
Referring to FIGS. 2 and 3, the door portion 44 includes an
inwardly directed projection 54 which is integrally formed with the
peripheral skirt 36 for cooperating with the downwardly facing
peripheral shoulder 30 of the container body 12 to provide
cooperable latch means which maintain said door portion 44 in a
closed position. The inwardly directed projection 54 of the door
portion 44 extends transversely for only a short distance to permit
release of the latch means in an easy fashion without separation of
the cover portion 42 from the container body 12.
The packaging system 10 is made ready for use by a user by
physically removing the closure 14, tearing off the
moisture-impervious sheet 16 to expose the contents within the
container body 12 and then replacing the closure 14 in a sealed
condition over the open end of said container body. After these
preparatory steps the closure 14 need not be physically removed
from the container body 12 when a product is to be removed
therefrom since the closure is provided with an integral hinge 38
about which the door portion 44 can be pivoted to expose the
contents disposed within the interior compartment 26.
An alternative embodiment of the unitary, snap-on closure of this
invention is illustrated at 60 in FIGS. 6 and 7. In this
embodiment, a reduction in the plastic material required to form
the unitary closure 14 of the initially described embodiment shown
in FIGS. 1-5 is achieved by forming a portion, and preferably, a
substantial portion, of a top wall 62 of the closure with less
expensive flexible sheeting made from paper, foil or other suitable
materials.
Referring to FIGS. 6 and 7, the unitary closure 60 includes a top
wall 62, a downwardly extending peripheral skirt 64 extending
around the periphery of said top wall, and an integral flexible
transverse hinge 66 intermediate front and rear ends 68 and 70,
respectively, of the closure. The unitary closure 60 is of a
two-piece construction in which the top wall 62 is defined by an
inwardly facing peripheral lip 72 of a unitary closure frame 74,
and a separate, flexible, substantially flat, moisture-impermeable
sheet 76 permanently affixed to the peripheral lip 72 of said
closure frame.
The integral flexible transverse hinge 66 is provided by a thinned
transverse zone 78 in opposing sides 80 and 82 of the inwardly
facing peripheral lip 72 intermediate the front and rear ends 68
and 70 of the unitary closure 60, and grooves 84 interrupting the
continuity of the peripheral skirt 64 of the closure frame 74 in
alignment with said thinned transverse zones 78. The flexible
transverse hinge 66 divides the closure into a rear stationary
cover portion 86 and a forward movable door portion 88.
The inwardly facing peripheral lip 72 of the closure frame 74 may
be of various different widths and configurations. If the
peripheral lip 72 is formed with minimal width and thickness, there
may be no need to include a thinned transverse zone in opposing
sides 80 and 82 thereof to aid in forming the flexible transverse
hinge 66. To further explain, the minimal width and thickness of
the lip would permit pivotal motion of the forward movable door
portion 88 of the closure 60 to thereby form an inherent hinge. The
flexible moisture-impermeable sheet 76 does not have to be grooved,
or thinned since it will inherently pivot (i.e., bend) when the
closure frame 74 is pivoted at the integral flexible transverse
hinge 66.
With respect to all other elements, the packaging system of the
alternative embodiment (FIGS. 6 and 7) is identical to the
packaging system of the initially described embodiment (FIGS. 1-5);
the unitary, snap-on closure 60 of the alternative embodiment being
attached to the container body 12, in identically the same manner
as the unitary, snap-on closure 14 of the initially described
embodiment.
The term "unitary", as used in the claims which follow, refers to
both the closure 14 of the initially described embodiment which is
of a one-piece construction; and the closure 60 of the alternative
embodiment, which is of a two-piece construction, but which
functions as a unit in substantially the same manner as the closure
14 of the initially described embodiment.
* * * * *