U.S. patent number 3,752,384 [Application Number 05/215,591] was granted by the patent office on 1973-08-14 for resilient packaging spacer.
This patent grant is currently assigned to International Paper Company. Invention is credited to Gene E. Siburn.
United States Patent |
3,752,384 |
Siburn |
August 14, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
RESILIENT PACKAGING SPACER
Abstract
A resilient packaging spacer is provided comprising a plurality
of flexible joined triangular or wedge-shaped elements, positioned
in the same plane, said spacer being equipped with flexible insert
means for attaching the spacer through a slit in a carton, such as
a paperboard container. The resilient packaging spacer is intended
to space cylindrical rectangular or square-shaped articles, such as
a water heater, etc., in a container. For packaging cylindrical
articles, the intermediate wedge-shaped elements are shorter than
the exterior or terminal elements.
Inventors: |
Siburn; Gene E. (Newburgh,
NY) |
Assignee: |
International Paper Company
(New York, NY)
|
Family
ID: |
22803580 |
Appl.
No.: |
05/215,591 |
Filed: |
January 5, 1972 |
Current U.S.
Class: |
206/521; 206/591;
206/593; 217/52; 217/53 |
Current CPC
Class: |
B65D
5/5088 (20130101) |
Current International
Class: |
B65D
5/50 (20060101); B65d 005/50 () |
Field of
Search: |
;229/14C ;206/46FC,46FR
;217/53 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moorhead; Davis T.
Claims
What is claimed is:
1. A resilient spacer adapted to be selectively applied to the
surfaces of an article to be packaged to cushion and space same
during handling, comprising an integral plurality of resilient
wedge-shaped elements positioned in substantially the same plane,
said spacer being equipped with a flexible tab means to removably
position said spacer on the wall of a container by insertion into a
slit in said container wall, said flexible tab means comprising an
integral resilient intermediate portion to register with a slit in
said container wall, said resilient intermediate portion integrally
communicating with a flexible end portion capable of removably
retaining said resilient spacer against said container wall.
2. A spacer according to claim 1, wherein the flexible tab means
are strips at each end of a row of said wedge-shaped elements.
3. A spacer according to claim 1, wherein the flexible tab means is
a strip applied at the side of a row of said wedge-shaped
elements.
4. A spacer according to claim 3, wherein said flexible tab means
is also equipped with a protrusion to hold said tab means in the
slit of the planar side wall of a container.
5. A spacer according to claim 1, wherein the intermediate
wedge-shaped elements are smaller than the terminal elements.
6. A spacer according to claim 1, wherein the wedge-shaped elements
are of substantially the same size.
7. A spacer according to claim 1, wherein the terminal wedge-shaped
elements are bevelled at their facing tips.
8. A spacer according to claim 1, wherein the terminal wedge-shaped
elements are connected to the intermediate wedge-shaped elements
through reinforcing ribs.
9. A spacer according to claim 1, made of polyethylene.
10. A spacer according to claim 1, wherein the intermediate portion
is at a substantially right angle to the plane of said spacer.
11. A spacer according to claim 10, wherein the flexible end
portion is at a substantially right angle to said intermediate
portion.
12. In combination with a container, a resilient spacer selectively
applied to the surfaces of a packaged article to cushion and space
same during handling, said resilient spacer comprising an integral
plurality of resilient wedge-shaped elements positioned in
substantially the same plane, said spacer being removably
positioned against a wall of said container by means of an integral
flexible tab means by insertion of said tab means into a slit in
said container wall, said flexible tab means comprising an integral
resilient intermediate portion in registration with said slit in
said container wall, said resilient intermediate portion integrally
communicating with a flexible end portion which removably retains
said resilient spacer against said container wall.
13. A combination according to claim 12, wherein the intermediate
portion is at a substantially right angle to the plane of said
spacer.
14. A combination according to claim 12 wherein the flexible end
portion is at a substantially right angle to said intermediate
portion.
Description
BACKGROUND OF THE INVENTION
This invention relates to a resilient packaging spacer comprised of
a molded flexible sheet of plastic material having a plurality of
joined triangular or wedge-shaped elements positioned in the same
plane, having flexible tab means for attaching the spacer to the
sides of a container, such as a paperboard carton to thereby space
a cylindrical rectangular or square-shaped article within the
container.
It has long been the practice in the packaging industry to protect
package contents from the damaging effects of impact, shock and
jarring unavoidably inherent in any shipping operation by providing
some type of resilient spacing material either between the article
itself and an enclosing carton or between inner containers carrying
such objects and surrounding outer containers. In this latter
manner the contents are tightly suspended within the outer
container and at the same time are separated therefrom on all sides
by the cushioning material, which serves to absorb any mechanical
shocks or impacts to the outer container and dampen their effects
on the contents.
In regard to spacing devices, several practical requirements must
be considered. First of all, the device should be capable of being
easily and quickly applied to the flat surfaces of a container in
such a manner that its manipulation is relatively foolproof. This
is due to the fact that such spacers are almost universally applied
by hand, and in any situation where manual operations are involved
the cost of labor must be held to a minimum. Secondly, the spacers
must be formed in such a manner that little or no material is
wasted or scrapped both during their fabrication and their
subsequent application to containers. This requirement arises
because in any packaging operation the over-all cost must be
reduced to a commercially acceptable or competitive level, and the
expense of the raw material as well as the finished spacer product
is a significant factor in the cost breakdown.
It is customary to ship water-heaters and other large cylindrical
shaped objects in rectangular cartons such as corrugated cartons.
This presents a problem in spacing and positioning the cylindrical
article within the corrugated carton. Various means have been
proposed for this, but these have generally been of an expensive or
unsatisfactory nature. For example, Stonebanks U.S. Pat. No.
3,159,326, Van Antwerpen U.S. Pat. No. 3,101,166, Welshenbach et
al., U.S. Pat. No. 2,681,733, and Gaulke U.S. Pat. No. 3,095,970
disclose spacing strips, but these are intricate spacers which
require relatively expensive construction or are insufficiently
flexible to be suited for the purpose. It is always a goal in the
packaging industry to provide a less expensive packaging means.
They also fail to provide a spacer which is suitable for spacing a
cylindrical object within the rectangular cross-sectioned
carton.
The spacer of the present invention is inexpensive to produce, is
light in weight, and is readily inserted and positioned in the
carton at the time of introducing the contents. These spacers are
capable of being nested when stored prior to use and therefore take
up very little space. They can be readily conformed from
thermoplastic materials by compression molding, such as from a
sheet of about 40 mils thick of high density polyethylene, at
extremely low cost. They can also be formed by injection molding or
thermoforming.
BRIEF SUMMARY OF THE INVENTION
The resilient packaging spacer of the present invention comprises
in general a plurality of flexible, joined triangular or
wedge-shaped elements positioned in a substantially single plane.
For packaging cylindrical objects, the outer elements are somewhat
larger than the intermediate elements. For rectangular or square
articles the elements may be of substantially equal size. The
spacer is equipped with flexible integral tab means for insertion
into a slit into a paperboard carton to thereby position or hold
the spacer into position onto the walls of the paperboard carton to
space or center the object to be packaged in the carton.
It is an object of the present invention to provide an inexpensive
flexible, resilient, hollow packaging spacer which can be
economically produced.
It is also an object of the invention to provide a hollow resilient
packaging spacer which can be stored in a minimum of space by
nesting a number of the spacers until intended to be used.
It is a further object of the invention to provide an integral
resilient packaging spacer comprising a plurality of flexible
hollow prisms or pyramids having a tab means for attaching said
spacer to the inner walls of a container, for example, a
rectangular container, and in which said prisms or pyramids conform
to the shape of a portion of the side walls of a cylinder, such as
a water heater, or other article to be packaged.
Other objects will be apparent to those skilled in the art from the
present disclosure and the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic representation of one embodiment of the
resilient packaging spacers of the invention attached to each of
the four walls of a rectangular shaped shipping carton to space for
illustrative purposes a cylindrical article, such as a hot water
heater, within the carton.
FIG. 2 is a perspective view of one embodiment of the packaging
spacers of the invention.
FIG. 3 is a top view of the embodiment of the spacer illustrated by
FIG. 2 shown in use position.
FIG. 4 is a front view of the embodiment of the spacer illustrated
by FIG. 2, also shown in use position, taken along line 4--4 of
FIG. 1.
FIG. 5 is a side or end view of the embodiment of the spacer
illustrated by FIG. 2.
FIG. 6 is a vertical section of the spacer illustrated by FIGS. 2
through 5, taken generally along line 6--6 of FIG. 3.
FIG. 7 is a perspective view of another embodiment of the packing
spacers of the invention.
FIG. 8 is a plan view of the embodiment of the spacer illustrated
by FIG. 7, shown in use position.
FIG. 9 is a front view of the embodiment of the spacer illustrated
by FIG. 7, also shown in use position.
FIG. 10 is an end view of the embodiment of the spacer illustrated
by FIG. 7.
FIG. 11 is a vertical sectional view in use position, of the spacer
illustrated by FIGS. 7 through 10, taken generally along line
11--11 of FIG. 9.
FIG. 12 is a fragmentary portion of the carton sidewall or blank
showing the cut-outs through which the tabs 15 and 16 of the
embodiment of FIGS. 2 through 6 are inserted.
FIG. 13 is a similar view of a potion of a carton side-wall or
blank showing the cut-out of the carton wall for the insertion of
tab 48 and button 50 of the embodiment of FIGS. 7 through 11.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings wherein the same reference numerals are
intended to designate like structural elements in the figures
throughout, FIG. 1 shows the utility of the invention wherein four
of the spacers of the invention are positioned in the planar side
walls of a rectangular shipping carton to center and space a
cylindrical object, such as a cylindrical hot water heater, within
the rectangular carton. Of course, any number of spacers may be
employed and a suitable number will depend to some extent upon how
high the carton will be. Similarly, the spacers may be constructed
to space square or rectangular shaped articles, instead of
cylindrical articles.
FIGS. 1 through 6 illustrate one embodiment 10 of the packing
spacer of the invention. In this embodiment the plurality of
resilient joined wedge-shaped elements 11, 12, 13 and 14 are
thermoformed or vacuum formed from a sheet of thermoplastic
amterial, such as a sheet of 40 mil thick high density
polyethylene, and having flexible tab means 15 and 16 at the ends
of the spacer for inserting into slits 20 in the paperboard carton
21. As shown in FIG. 3, the tabs 15 and 16 are connected to the
remainder of the spacer 10 through bends 23 and 24, respectively.
The intermediate wedge-shaped elements 12 and 13 are smaller than
terminal elements 11 and 14 to thereby more readily center the
cylindrical object 22 to be packaged in the carton 21 as shown in
FIG. 1. Elements 11 and 14 have the facing tips of the wedges
bevelled as shown at 11a and 14a, respectively, to more effectively
center the cylindrical object within the carton.
In the embodiment shown in FIGS. 1-6, the wedges themselves are
hollow to provide resilience having been formed by molding of a
sheet of plastic material. Wedges 11, 12, 13 and 14 are integrally
connected to each other at their bases as shown at 28, 29 and
30.
FIGS. 7 through 11 illustrate another spacer of the invention
wherein the wedge-shaped elements 41, 42, 43 and 44 are similar to
those in the embodiment of FIGS. 1 through 6, but with ribs 51 and
52 being introduced, respectively, between elements 41 and 42 and
43 and 44 to impart greater rigidity to the spacer. As in the case
of the embodiment of FIGS. 1 through 6, the intermediate
wedge-shaped elements 42 and 43 are smaller than terminal elements
41 and 44. Also, the terminal elements 41 and 44 are bevelled as
shown at 41a and 44a, respectively, to assist in centering the
cylindrical object 22 in the carton 21. The spacer of FIGS. 7
through 11 is equipped with a single tab means 48 through bend 49
for insertion in a single horizontal slit in the walls of a carton
to thereby hold the spacer in place. This embodiment is further
equipped with button 50, which assists in placing the spacer in a
slit in the walls of the container shaped to conform to the tab and
the button.
In the embodiment shown in FIGS. 7 through 11, terminal wedges 41
and 44, respectively, have one end angled as shown by 41b and 41c
and 44b and 44c. The wedges themselves are hollow to provide
resilience, having been formed by molding a sheet of plastic
material. The wedges are integrally connected to each other at
their bases as shown at 53, 54 and 55.
The embodiment of FIGS. 7 through 11 is inserted into a cut-out in
carton wall 21 as shown in FIG. 13, which has a slit 56 and a disc
aperture 57, to accommodate tab 48 and button 50, respectively, as
shown in FIG. 9.
The spacers of the invention can be produced from sheets of
polymeric material, such as polypropylene, polybutadiene, polyvinyl
chloride, ABS polymer, polymethylmethacrylate, polyvinyl acetate,
and the like.
The terms and expressions which have been employed are used as
terms of description and not of limitation, and there is no
intention in the use of such terms and expressions of excluding any
equivalents of the features shown and described or portions
thereof, but it is recognized that various modifications are
possible withintthe scope of the invention claimed.
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