U.S. patent number 3,899,080 [Application Number 05/330,482] was granted by the patent office on 1975-08-12 for pill package.
This patent grant is currently assigned to Standard Packaging Corporation. Invention is credited to Michael J. Brunda.
United States Patent |
3,899,080 |
Brunda |
August 12, 1975 |
Pill package
Abstract
A package construction which is particularly suitable for pills
and tablets is formed from a flexible plastic container having a
recess which holds the product and a composite lid which forms an
air-tight package. The lid includes a rupturable layer, and a
protective layer which is joined to the rupturable layer by a
peelable adhesive. Access to the package contents is achieved by
stripping the protective layer followed by pushing the product
through the rupturable layer.
Inventors: |
Brunda; Michael J. (Clifton,
NJ) |
Assignee: |
Standard Packaging Corporation
(New york, NY)
|
Family
ID: |
23289977 |
Appl.
No.: |
05/330,482 |
Filed: |
February 8, 1973 |
Current U.S.
Class: |
206/531; 206/469;
229/125.35; 206/461; 206/820; 229/245 |
Current CPC
Class: |
B65D
75/327 (20130101); B65D 2575/3245 (20130101); B65D
2215/04 (20130101); B65D 2585/56 (20130101); Y10S
206/82 (20130101) |
Current International
Class: |
B65D
75/28 (20060101); B65D 75/34 (20060101); B65D
075/42 (); B65D 075/46 (); B65D 083/04 () |
Field of
Search: |
;206/42,498,461,484,820
;229/51D |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dixson, Jr.; William T.
Attorney, Agent or Firm: Amster & Rothstein
Claims
What is claimed is:
1. A package comprising a product container including at least one
recess for housing a product and a composite lid, said lid
comprising an inner rupturable layer, an outer, non-rupturable
protective layer and an intermediate adhesive layer joining said
protective and rupturable layers, said protective layer being
removable from said composite lid without causing the rupture of
said rupturable layer, said lid being heat sealed to said container
to form an air-tight compartment for said product.
2. The package of claim 1 wherein said rupturable layer is a metal
foil.
3. The package of claim 2 wherein the surface of said metal foil
layer which is joined to said container is coated with a heat
sealable material.
4. The package of claim 1 which includes multiple recesses in said
product container.
5. The package of claim 4 wherein the protective layer of said lid
is divided into sections, each section covering an area
approximately equal to the area defined by a recess in said product
container whereby that portion of the protective layer covering a
single recess may be removed without causing the removal of an
adjacent portion of said protective layer.
Description
This invention relates to a novel packaging system for solid
materials in pill or tablet form. More particularly, the present
invention relates to a novel package designed to securely hold
pharmaceutical pills or other potentially dangerous products so as
to reduce the possibility of obtaining accidental access to the
contents of such a package.
Many commercially available packages for medicinal tablets and
pills are formed from a flexible plastic container which houses the
pill and a rupturable lid. In such arrangements, individual pills
are removed from the package by pushing the pill through the
rupturable layer by applying pressure to the flexible plastic
container. Such an arrangement requires that the rupturable layer
be fairly weak and brittle so that it may be easily ruptured when
access to the package contents is desired. While such a packaging
arrangement offers a substantial convenience to the consumer, the
ease with which the package may be ruptured presents a substantial
danger of accidental access to the package contents. Thus, a child
gaining access to such a package could, quite easily, in the course
of playing with the package, cause the lid to rupture and obtain
access to a potentially dangerous drug.
Accordingly, it is an object of the present invention to provide a
novel package construction which is not readily subject to
accidental opening, particularly by children.
Yet another object of the invention is to provide a novel pill
package which has a simple construction, is relatively inexpensive
and permits the user to gain access to its contents in a simple
fashion.
The above and other objects of the invention are achieved by a
novel pill package which, in addition to the semi-rigid or flexible
container and rupturable layer which have characterized prior art
pill packages also includes a film layer adhesively joined to and
in intimate contact with the rupturable layer. By employing a
non-rupturable film layer and an adhesive which will permit
stripping of that layer without rupture of the underlying
rupturable layer, two steps in proper sequence are required in
order to obtain access to the package contents. Thus, even if a
child gains access to the package of the invention, the package
cannot be accidentally ruptured and a deliberate peeling step
followed by a rupture step will be required in order to obtain
access to the package contents.
The invention will be further understood by reference to the
drawings wherein:
FIG. 1 is a cross section of an individual package for containing a
pill in accordance with the structure of the invention.
FIG. 2 is a perspective view of a package designed to contain
multiple tablets which also illustrates the manner in which a
single tablet is removed from the package.
Referring to FIG. 1, there is illustrated a package 10 for
containing a single pill 16 which consists of a flexible plastic
layer 12 having a depression or recess 14 which houses pill 16 and
a composite lid 18 which forms an air-tight closure over the
depression.
The flexible plastic layer 12 may be selected from a wide variety
of semi-rigid or fully flexible materials and a variety of
techniques which are well known in the art may be employed to form
the recess in that layer. For example, the recess may be formed by
a molding technique involving the application of heat and/or
pressure to a plastic material such as polystyrene, polyethylene,
polypropylene, polyvinyl chloride or a similar plastic material.
The size and shape of the recess or cavity and the selection of a
particular material is a matter of choice which will be dictated by
the size and nature of the pill, as well as other considerations
which are well known to those persons skilled in the art. The
thickness of the plastic material used to form the recess is also
not critical. The minimum thickness will be selected such that the
recess will not be subject to accidental rupture. Suitable
thickness will be in the range of 1 mil to 30 mils, preferably 5 to
15 mils, e.g. 10 mils.
The composite lid 18, which forms an air-tight closure with the
pill container, comprises at least three and possibly four distinct
layers which together reduce the possibility of accidentally
obtaining access to the package contents. The three essential
layers include a rupturable layer 20 which overlies and is in
intimate contact with the peripheral shoulders 22 of product
container 12; a peelable adhesive layer 24 which overlies and is in
intimate contact with the rupturable layer 20; and a strippable
film layer 26 overlying and in intimate contact with adhesive layer
24.
In a preferred embodiment, the rupturable layer is formed from a
frangible material such as paper, selected plastics or metal foil.
Since such materials are not readily heat sealable to the plastic
container layer 12 to form an air-tight sealed package, it is
necessary, with such materials, to provide a coating layer 28 of a
heat sealable material on the surface of the rupturable layer which
faces the plastic container. Such coatings are well known in the
art and may be selected from such materials as vinyls, acrylics or
polyolefins which are applied by spraying, dipping or similar
techniques. In lieu of a rupturable metal foil, other rupturable
materials such as cellophane, polyethylene, polypropylene and the
like may be employed and in those instances where a heat sealable
rupturable material is utilized, the heat seal coating 28 may be
omitted. The thickness of the rupturable layer is not critical, and
ordinarily will be maintained within a range which provides
adequate protection for the package contents while still being
capable of rupture without the application of undue force.
The nature of the added protective layer 26 is not critical and a
wide variety of plastic or other materials may be employed. Among
the materials which may be used are polyester, polyolefin,
polyamide, polycarbonate and polysulfone films, or combinations
thereof. Non-plastic protective layers such as paper or cardboard
may also be employed and such materials offer the additional
advantage of providing a suitable surface for printing instructions
with respect to the use of the contents of the package. It will
readily occur to those persons skilled in the art that a paper or
carboard layer may be combined, if desired, with an underlying
plastic film protective layer in order to provide a suitable
printing surface. The thickness of the protective layer is not
critical, although it should have sufficient thickness to avoid
accidental rupture. Such thickness will vary with the selection of
a particular material and can readily be determined by those
persons skilled in the art. Typically, the protective layer may
have a thickness in the range of 0.5 to 4 mils, preferably 0.5 to
1.5 mils, e.g., 0.75 mils.
The nature of the adhesive layer 24 which joins protective layer 26
to rupturable layer 20 is an important feature of the invention.
While the exact nature of the adhesive employed will depend upon
the materials used in forming the rupturable layer and the
protective layer, the adhesive, in all cases, must be of such a
nature that it permits the protective layer to be peeled away
without causing rupture of the underlying rupturable layer.
Accordingly, the adhesive employed must either have high adherence
to the protective layer and relatively low adherence to the
rupturable layer, or vice versa. Typical adhesives which exhibit
this quality include rubber, vinyl, and acrylic cements. In a
preferred embodiment where a metallic foil is employed as the
rupturable layer and a polyester is employed as a protective layer,
an adhesive comprising rubber or acrylic cement is suitable.
FIG. 2 illustrates a package structure including multiple recesses
for housing multiple pills, or tablets and also illustrates the
manner in which an individual pill may be dispensed. In this
arrangement, a package 30 having multiple pill recesses 32 and 33
is formed from a single semi-rigid plastic layer 34 by conventional
vacuum or thermo-forming techniques as previously described and a
lid 36 of suitable size to cover all of the pill recesses is heat
sealed over the entire container layer to form an air-tight
package. By providing perforations or areas of weakness 38
completely surrounding each individual recess 32 in the multiple
container structure the capability of removing a single pill at a
time from the package is provided. Specifically, the perforations
38 serve to limit the amount of protective layer 40 which can be
removed in a single stripping operation such that only the
protective layer covering a single pill can be removed in a single
stripping step. For example, as illustrated, if it is desired to
remove a single pill 42 from recess 32, the stripping of protective
layer 40 will be limited to the area defined by perforations 38a
and 38b. Thereafter, only the portion of the rupturable layer 44
immediately above recess 32 will be ruptured by the application of
pressure from the finger of the consumer on recess 32. By this
technique, a series of individual pill containers substantially
identical to that described in connection with FIG. 1 are created
from larger integral layers of materials.
It will be readily understood by those persons skilled in the art
that the package structure described herein may be used to package
a wide variety of materials and is not limited to the packaging of
any particular type of material. However, the package is
particularly suited for housing dangerous drugs or other hazardous
materials since the system requires two deliberate steps, in
particular sequence, in order to achieve access to the package
contents, thereby substantially reducing the possibility of
accidental opening.
Having thus described the general nature as well as specific
embodiments of the invention, the true scope will now be pointed
out in the appended claims.
* * * * *