U.S. patent number 3,843,038 [Application Number 05/381,986] was granted by the patent office on 1974-10-22 for corner protector construction.
This patent grant is currently assigned to Redi Container Corporation. Invention is credited to Alan M. Sax.
United States Patent |
3,843,038 |
Sax |
October 22, 1974 |
CORNER PROTECTOR CONSTRUCTION
Abstract
A corner protector construction used for protecting appliances,
furniture, sheet rock panels and the like during shipping and
handling. The construction is formed from a blank comprising a
corrugated sheet having a plurality of parallel foldlines in one
direction and a center foldline perpendicular thereto. The blank is
adapted to be folded so that a threewalled configuration is
achieved with each wall being positioned at a 90.degree. angle
relative to the other two walls to thereby define a corner
configuration. The folding automatically locates a plurality of
thicknesses of the corrugated sheet with respect to each wall. One
of the walls is defined by means of interlocking sections with the
interlocking structure providing for automatic locking as the blank
is folded into the desired configuration.
Inventors: |
Sax; Alan M. (Schaumburg,
IL) |
Assignee: |
Redi Container Corporation
(Chicago, IL)
|
Family
ID: |
23507104 |
Appl.
No.: |
05/381,986 |
Filed: |
July 23, 1973 |
Current U.S.
Class: |
206/586 |
Current CPC
Class: |
B65D
81/056 (20130101); B65D 2581/053 (20130101) |
Current International
Class: |
B65D
81/05 (20060101); B65d 001/36 (); B65d 003/24 ();
B65d 081/00 () |
Field of
Search: |
;229/14R,14C,DIG.1
;206/46FN,62R,451 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Christian; Leonard D.
Attorney, Agent or Firm: McDougall, Hersh & Scott
Claims
That which is claimed is:
1. A blank for use in forming a construction used for protecting
the exposed corners of objects during shipping and handling, said
blank comprising a substantially rectangular corrugated sheet, a
first foldline extending approximately along one centerline of the
sheet, second, third and fourth foldlines extending parallel with
the first foldline, said second, third and fourth foldlines all
being located on one side of said first foldline, a fifth foldline
extending parallel with said first foldline, said fifth foldline
being located on the opposite side of said first foldline and a
sixth foldline extending approximately along the centerline of the
sheet and extending perpendicular to the other foldlines, said
blank being foldable about said parallel foldlines to a
configuration wherein the outer blank portion between said sixth
foldline and an outer edge of the blank is positioned at 90.degree.
relative to the blank portion between said first foldline and said
sixth foldline, and wherein the blank portion between said second
and fourth foldlines is positioned in underlying relationship
relative to said outer blank portions at an angle of 90.degree.
relative to the remaining blank portions on said one side of the
first foldline, said outer portion being divided into two sections
on opposite sides of said sixth foldline, and including locking
tabs defined by said sections whereby the blank can be folded about
said sixth foldline to bring said tabs into locking engagement.
2. A blank in accordance with claim 1 foldable into a three-walled
construction comprising a horizontal wall and two vertical walls
extending perpendicular to the horizontal wall and perpendicular to
each other, all of said walls defining three thicknesses of
corrugated sheet adjacent the junctures of the walls.
3. A blank in accordance with claim 2 defining a large internally
located diamond shape cutout, said blank being foldable so that
opposed edges of the cutout move into abutting relationship to
bring said vertical walls into perpendicular relationship with
respect to each other.
4. A blank in accordance with claim 2 including ears formed
integrally with the blank and adapted to be automatically
positioned perpendicular to said horizontal wall to thereby provide
locating means for bands utilized for securing the constructions to
said objects.
5. A blank in accordance with claim 1 including slots defined by
each of said sections of said outer portion, said slots being
brought into alignment as the blank is folded into the
construction, and including locking tabs at the ends of said slots
to achieve the interlocking of said sections.
Description
This invention relates to a construction utilized for protecting
the corners of objects to prevent damage to the objects during
shipping and handling. Such protectors are typically used in
association with appliances and furniture and other objects which
can only be successfully marketed when they present an undamaged
appearance.
The use of corner protectors is wide spread, particularly with
respect to objects which are subject to damage when they are
dropped or otherwise mishandled. The corners of such objects are
naturally most susceptible to damage and, therefore, the protection
afforded by packing cartons and the like has been supplemented by
re-enforcing means utilized for protecting corners.
In addition to appliances and furniture, corner protectors are
widely used in connection with bundles of sheet rock paneling and
the like since the exposed corners of such bundles are quite
susceptible to damage and since such damage can significantly
diminish the value of the sheets. Taylor U.S. Pat. No. 3,443,684
issued on May 13, 1969 provides a disclosure of a corner protector
which is particularly suitable for use in connection with such
bundles. This application particularly describes means for
efficiently applying steel bands which are utilized for securing
the bundles.
There is a constant need to provide corner protectors which are
capable of being produced at low cost and which can be efficiently
used from the standpoint of initial assembly and from the
standpoint of actual protection of the goods.
It is the general object of this invention to provide an improved
corner protector which meets these needs to a degree heretofore
unattained.
It is a more specific object of this invention to provide a corner
protector design which can be efficiently manufactured, efficiently
stored and shipped, and very rapidly assembled whereby the use of
the corner protectors leads to minimum difficulty.
It is a still further object of this invention to provide a corner
protector design which exhibits completely adequate protecting
capability while at the same time being characterized by automatic
assembly means so that the protectors can be used in an efficient
manner by unskilled personnel.
These and other objects of the invention will appear hereinafter
and for purposes of illustration but not of limitation, specific
embodiments of the invention are shown in the accompanying drawings
in which:
FIG. 1 is a fragmentary perspective view illustrating a corner
protector in association with a bundle;
FIG. 2 is a perspective view illustrating the bundle with the
corner protectors in position;
FIG. 3 is a perspective view of the corner protector viewed from
the inside;
FIG. 4 is a perspective view of the corner protector viewed from
the opposite side;
FIG. 5 is a perspective view of the corner protector in the
partially unlocked condition;
FIG. 6 is a perspective view of the corner protector illustrated in
the open position prior to locking;
FIG. 7 is an enlarged fragmentary cross-sectional view of the
corner protector taken about the line 7--7 of FIG. 4;
FIG. 8 is a plan view of the corner protector;
FIG. 9 is a plan view of the corner protector looking from the
opposite side; and,
FIG. 10 is a plan view of a blank section utilized for forming the
corner protector.
This invention generally relates to a corner protector adapted to
be formed from a blank of cardboard, preferably a corrugated sheet.
The blank is die-cut to provide a suitable shape particularly with
respect to automatic locking means which comprise a feature of the
protector. A plurality of scorelines are formed in the blank to
facilitate the folding operation. One of the scorelines bisects the
blank in one direction while the remaining scorelines are
positioned perpendicular to the one scoreline. These remaining
scorelines then permit folding of blank portions into overlying
relationship whereby a multiple thickness arrangement is achieved.
When the blank is folded so that a corner configuration is formed,
locking tabs automatically come into play whereby the protector is
immediately ready for use.
The corner protector 10 illustrated in the accompanying drawings
comprises a three-walled structure consisting of a horizontal wall
12 and vertical walls 14 and 16. The vertical walls are
perpendicular with each other, and the wall 12 is perpendicular to
the vertical walls so that a corner configuration is achieved as
best illustrated in FIGS. 3 and 4.
The corner protector is adapted to be used in association with a
bundle 18 or in association with some other type of object which
defines exposed corners likely to be damaged if the object is
mishandled. Thus, the corner protectors of the invention are used
in a generally conventional manner in that the protectors are
located on the bundle or other object 18 with a cover or carton 20
then being located around the bundle.
The specific configuration of the protector can be best understood
by considering the blank 22 illustrated in FIG. 10. As indicated,
this blank preferably comprises a section of a cardboard sheet and
is preferably corrugated. The blank is substantially rectangular
and is provided with a plurality of foldlines, these lines being
formed by scoring of the blank.
The foldlines comprise a first line 24 located at approximately the
center of the blank. Additional foldlines 26, 28 and 30 are defined
on one side of the line 24, and a fifth foldline 32 is formed on
the opposite side of the line 24. A sixth foldline 34 extends
perpendicular to the other five foldlines, and this sixth line
substantially bisects the blank.
A diecutting operation is preferably involved in the forming of the
blank. This operation includes the provision of ears 36 and 38
formed, respectively, adjacent the foldlines 30 and 32. These ears
extend outwardly after the blank has been folded into the desired
configuration. As explained in the aforementioned Taylor patent,
these ears function to hold bands which are employed for securing a
bundle of sheets or for other purposes. Thus, the blank design of
the invention permits the inclusion of these ears while
accomplishing the other benefits of the invention.
An enlarged diamond-shaped cut-out 40 having a stemshaped portion
42 is included in the blank. As will be explained, this arrangement
enables folding of the blank into the final configuration desired
for use. Similarly, an elongated cutout 44 is defined along this
same foldline 34 whereby additional freedom of movement is provided
during folding operation to enable achieving of the desired
configuration.
The blank defines a pair of outer wing portions 46 positioned on
opposite sides of the cutout 44. One wing portion 46 carries a tab
48 and defines an adjacent cutout slot 50. The other wing portion
carries a tab 52 terminating in a small semi-circular cutout
54.
In accordance with a preferred form of the iinvention, the blank 22
comprises one corner of a large sheet which defines at least three
other blanks. These blanks are preferably secured together along
lines 56 which may be perforated so that the individual blanks 22
can be readily separated for use. By providing four or more blanks
in a single sheet, storage and inventory problems can be greatly
minimized. Furthermore, workmen can be given a single sheet which
will provide corner protectors for one end of a bundle being
prepared for binding and shipping.
In utilizing the blank shown in FIG. 10, the blank is first folded
about the line 28 so that the blank section 58 is located in
overlying relation with the blank section 60 on the opposite side
of the line 28. Thereafter, the blank is folded about the lines 26
and 30 so that a triple thickness of material is developed for the
walls 12 and 16 adjacent the juncture of these walls. It will be
noted that the line 28 is a double-scored line to facilitate
bending through 180.degree.. The lines 26 and 30 are single-scored
which tends to automatically permit bending of these walls to a
limit of 90.degree.. The wing portions 46 are thereafter folded to
a 90.degree. position such as shown in FIG. 6.
When the entire configuration is then folded through 90.degree.
about the line 34, the configuration of FIGS. 3 and 4 is achieved.
At this point, the locking tabs come into play since the tab design
is such that one of the tabs on the wing portions 46 will
automatically be received relative to the other tab. The particular
interlocking arrangement of these tabs is shown in FIGS. 3, 5, 8
and 9. It will be noted that the tabs define abutting edge portions
62 and 64, with these edge portions serving as latch means which
complement each other to resist any accidental opening of the
corner protector once it has been folded into position for use.
The particular locking tab design accomplishes automatic locking
due to the fact that the wing portions 46 are adapted to slide
relative to each other as the construction is folded. As these
surfaces slide, the leading edge of one enters the slotted area
defined by the other. Once the 90.degree. movement of the wing
portions is completed, the interlocking is accomplished. In this
connection, the edges of the stem 42 located at the end of the
cutout 40 provide abutments to limit the folding about line 44 to
90.degree..
The corner protector construction of the invention is characterized
by a relatively inexpensive design since the entire blank can be
formed with high production die-cutting and scoring equipment. The
fact that a plurality of the blanks can be held in a single sheet
assembly is also of importance from the standpoint of shipping and
inventory expense.
The ears 36 and 38 will automatically be positioned as best shown
in FIGS. 1 and 4 when the folding operation occurs. Specifically,
the ears 38 are formed as extensions of the outer surface of the
walls 14 and 16. The ears 36 automatically enter the openings which
are provided when the sections 46 are folded to a 90.degree.
position relative to the ears 38. A double-thickness of the ears
is, therefore, provided for enabling a strong binding positioning
structure.
The corner protector design is also distinctly advantageous from
the standpoint of the amount of protection achieved by the
relatively uncomplicated design. Thus, a minimum of a treble
thickness of material is provided for all three walls of the
construction. Protection is, therefore, afforded from any
direction.
It will be understood that various changes and modifications may be
made in the above described construction which provide the
characteristics of the invention without departing from the spirit
thereof particularly as defined in the following claims.
* * * * *