U.S. patent number 3,655,112 [Application Number 05/082,402] was granted by the patent office on 1972-04-11 for protective corner pad.
This patent grant is currently assigned to Hoerner Waldorf Corporation. Invention is credited to James E. Jeffers.
United States Patent |
3,655,112 |
Jeffers |
April 11, 1972 |
PROTECTIVE CORNER PAD
Abstract
A protective corner pad includes a sheet of corrugated
paperboard or the like in which two peripheral wall panels are
foldably connected to fold into right angular relation, and are
hingedly connected to face panels which may fold into coplanar
relation and which are provided with mitered edges which may abut.
A locking tongue and notch hold the mitered edges abutting.
Reinforcing panels are usually hinged to the edges of said wall
panels and folded inwardly into face contact with the wall panels
to which they are hinged. Cushioning panels generally coextensive
with said face panels are hinged to said face panels to lie in face
contact therewith.
Inventors: |
Jeffers; James E. (Little Rock,
AR) |
Assignee: |
Hoerner Waldorf Corporation
(Ramsey County, MN)
|
Family
ID: |
22170974 |
Appl.
No.: |
05/082,402 |
Filed: |
October 20, 1970 |
Current U.S.
Class: |
206/586; 206/320;
217/52 |
Current CPC
Class: |
B65D
81/056 (20130101); B65D 2581/053 (20130101) |
Current International
Class: |
B65D
81/05 (20060101); B65d 005/60 () |
Field of
Search: |
;229/DIG.1,14C
;206/46FR,46FN,62R ;248/345.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Leclair; Joseph R.
Assistant Examiner: Garbe; Stephen P.
Claims
In accordance with the patent statutes, I have described the
principles of construction and operation of my protective corner
pad, and while I have endeavored to set forth the best embodiment
thereof, I desire to have it understood that obvious changes may be
made within the scope of the following claims without departing
from the spirit of my invention.
1. A corner pad including:
a generally rectangular sheet of paperboard cut and creased to
provide a pair of peripheral wall panels foldably connected
together to fold into generally right angular relationship, and a
pair of face panels hingedly connected to said peripheral wall
panels along a substantially common line of fold, and foldable into
a common plane,
the adjoining ends of said face panels being cut along right
angularly related mitered edges to fit into edge abutting relation
and form a mitered corner when said wall panels are folded into
right angular relation,
a locking tongue projecting from one of said mitered edges of one
of said face panels, and a tongue receiving notch in the other of
said mitered edges of said other said face panel,
said locking tongue being in coplanar relation to said face panels
when engaged in said notch.
2. The structure of claim 1 and in which said locking tongue is of
generally trapezoidal outline and connected to said one adjoining
end of said one face panel along its shorter parallel edge.
3. The structure of claim 1 and including reinforcing panels
foldably connected to said peripheral wall panels along the edges
thereof which are parallel to the edges thereof connected to said
face panels, said reinforcing panels being folded into face contact
with the wall panels to which they are foldably connected.
4. The structure of claim 3 and in which said reinforcing panels
are in face contact to the surface of said wall panels which is the
inner surface when said wall panels are folded into right angular
relation.
5. The structure of claim 3 and in which said reinforcing panels
are each connected to said wall panels by spaced connecting straps
on opposite sides of an intermediate cut line.
6. The structure of claim 3 and in which the ends of said wall
panels opposite the hingedly connected ends are connected to the
corresponding ends of said reinforcing panels by interlocking
tongue and groove means.
7. The structure of claim 1 and including cushioning panels
hingedly connected to the edges of said face panels opposite the
edges hingedly connected to said wall panels, said cushioning
panels being substantially coextensive with said face panels when
folded into face contact therewith.
8. The structure of claim 7 and including a locking tongue
projecting from the edge of one of said cushioning panels
corresponding to said mitered edges of said face panels, and the
other of said cushioning panels includes a notch into which said
last named locking tongue is engageable.
9. The structure of claim 7 and in which said cushioning panels are
connected to said face panels along spaced connecting straps on
opposite sides of a cut line.
10. A corner pad including:
a generally rectangular sheet of corrugated paperboard cut and
creased to provide, in series, a pair of reinforcing panels, a pair
of peripheral wall panels, a pair of face panels, and a pair of
cushioning panels foldably connected along parallel fold lines,
said peripheral wall panels being foldably connected together to
fold into right angular relationship,
said reinforcing panels being independently foldable relative to,
and substantially coextensive with, the wall panels to which they
are hinged,
said face panels having their inner ends cut along right angularly
arranged mitered edges to provide a mitered corner when said wall
panels are folded into right angular relationship,
a locking tongue projecting from one of said mitered edges,
a locking tongue receiving notch in the other of said mitered edges
to receive said locking tongue,
said locking tongue being substantially coplanar to said face
panels when engaged in said notch,
said cushioning panels being foldable into face contact with the
face panels to which they are hinged and being substantially
coextensive therewith, said cushioning panels meeting along mitered
edges which coincide with the mitered edges of said face
panels.
11. The structure of claim 10 and including a locking tongue
projecting from one mitered edge of one cushioning panel, and said
other cushioning panel includes a notch into which said last named
locking tongue is engageable.
Description
This invention relates to an improvement in protective corner pads
and deals particularly with a pad made of corrugated paperboard or
similar material designed to protect the corners of objects being
packaged in containers.
BACKGROUND OF THE INVENTION
Articles packed in corrugated containers often require interior
packing within the container to prevent injury to the contents. For
example, washing machines, dryers, refrigerators and the like often
include elongated corner posts formed of several thicknesses of
corrugated board arranged in right angular relation and inserted
between the corners of the packaged article and the corner edges of
the container to protect the articles from damage. Other articles,
such as doors, window frames and the like are often protected by
angular corner pads which fit over portions of the three adjoining
surfaces at the corners of the object to protect these areas from
injury during shipment and handling, the corners of such objects
being the areas normally most susceptible to injury.
One of the problems involved in the use of corner pads lies in the
fact that if they are preformed of two or more thicknesses of
corrugated paper-board, they are extremely bulky unless they can be
supplied in flat form. When such flat corner pads are folded and
inserted into the container between the article contained and the
walls of the container, difficulty is often experienced in holding
the corner pads in place until the container is closed. It is often
necessary to insert the corner pads in place and then immediately
fold the container closure flaps over the pads so that the pads
will not tend to unfold or become misplaced before the container is
closed, thus complicating any automatic closing operation.
SUMMARY OF THE INVENTION
An object of the present invention resides in the provision of a
corner pad of the type designed to overlie areas of the three
surfaces meeting at the corner and which will retain its assembled
form to greatly facilitate the insertion of the corner pads, and to
facilitate the use of automatic equipment to close the containers
after the corner pads have been inserted.
A feature of the present invention resides in the provision of a
corner pad which is formed of a rectangular sheet of corrugated
paperboard and which, if desired, may be folded into proper form
for insertion into the container in advance of the time the corner
pads are used. The blanks forming the corner pad may be easily
folded to provide double thickness peripheral walls, and double
thickness face panels, and the panels may be readily interlocked
into completed form to be stored in reasonable volume until used.
Thus, the necessary number of corner pads need not be formed
simultaneously as the articles are packed, saving considerable time
in the packaging operation.
A feature of the present invention resides in the provision of a
corner pad having a pair of hingedly connected peripheral wall
panels, and a pair of generally trapezoidal face panels hingedly
connected to an edge thereof. The face panels are formed to provide
a mitered corner when the wall panels are folded into right angular
relation. A locking tongue projects from one mitered edge and
engages in a notch in the other mitered edge in such a manner that
the locking tongue remains coplanar with the face panels. The
locking tongue thus holds the panels in proper relation prior to
use.
A further feature of the present invention resides in the provision
of a corner pad of the type described which includes cushioning
panels hinged to the face panels and folded into face contact
therewith to form a double thickness construction. The peripheral
wall panels are also provided with hingedly connected reinforcing
panels which fold into face contact with the inner surfaces of the
peripheral panels. The cushioning panels are held in place by the
edges of the reinforcing panels. Interlocking means are provided on
the wall panels and reinforcing panels to effectively hold the
entire unit assembled and in readiness for use.
These and other objects and novel features of the present invention
will be more clearly and fully set forth in the following
specification and claims .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of my protective corner pad in
assembled condition.
FIG. 2 is a perspective view of the outer surface of the assembled
corner pad.
FIG. 3 is a perspective view of the corner pad in partially
assembled condition.
FIG. 4 is a diagrammatic view of the blank from which the corner
pad is formed.
FIG. 5 is a diagrammatic view of a portion on a modified form of
blank.
FIG. 6 is a perspective view of the corner pad formed from the
blank shown in FIG. 5.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The protective corner pad A is made from the blank illustrated in
FIG. 4. As indicated, the pad includes peripheral wall panels 10
and 11 which are connected along a central fold line 12. Face
panels 13 and 14 are hingedly connected to an edge of the wall
panels 10 and 11 along a fold line 15. The face panels 13 and 14
are generally trapezoidal in outline, and are connected along the
longer parallel edge at the fold line 15. The adjoining end edges
of the face panels 13 and 14 are angularly related to form mitered
edges 16 and 17 respectively. These mitered edges 16 and 17 are
designed to fold into edge abutting relation when the peripheral
wall panels 10 and 11 are folded into right angles along the center
fold line 12.
A locking tongue 19 projects from one of the mitered edges, such as
the edge 16, and the other mitered edge 17 is provided with a
similarly shaped notch 20 to accommodate the tongue 19. In the
particular arrangement illustrated, the locking tongue 19 is of
trapezoidal shape with the longer edge of the trapezoid at the free
end of the tongue. The notch 20 is correspondingly shaped so that
the tongue 19 may be inserted into the notch 20 and be coplanar
with the face panels.
Trapezoidal cushioning panels 21 and 22 are hingedly connected to
the face panels 13 and 14 to fold into face contact therewith. The
panels 21 and 13 are substantially equal size and shape and are
substantially coextensive. The panels 14 and 22 are also
substantially coextensive in shape or size. In order to facilitate
the folding of the cushioning panels, the panels 13 and 21 are
connected by two short connecting straps 23 at opposite ends of the
shorter parallel sides of the trapezoidal panels. These straps are
defined by a pair of spaced fold lines 24. A cut line 25 extends
between the straps 23 so that the panels are partially
disconnected. The straps 23 are long enough to permit the panels 13
and 21 to fold into face contact. Similar spaced connecting straps
26 defined by parallel fold lines 27 are separated by an
intermediate cut line 29. Thus folding arrangement merely
simplifies the folding operation and permits the cushioning panels
to rest flatly upon the face panels 13 and 14. In view of the fact
that the intermediate portions of the panels on opposite sides of
the cut lines 25 and 29 project beyond the fold lines 24 and 27,
the connected panels tend to remain in face contact.
Generally rectangular reinforcing panels 31 and 32 are hingedly
connected to the peripheral wall panels 10 and 11 respectively. In
order to simplify the folding, the panel 31 is hingedly connected
to the panel 10 by spaced connecting straps 33 hingedly connected
to the panels 10 and 31 along spaced parallel fold lines 34. The
reinforcing panel 32 is similarly connected to the wall panel 11 by
connecting straps 35 hingedly connected to the panels 11 and 32 by
parallel spaced fold lines 36. Cut lines 37 and 39 extend between
the straps 33 and the straps 35 respectively.
The edges of the wall panels 10 and 11 which are most remote from
the fold line 12 are provided with generally trapezoidal notches
40. The corresponding end edges of the reinforcing panels 31 and 32
are provided with generally trapezoidal locking tongues 41 defined
by inwardly converging cut lines 42. The locking tongues 41 are
positioned to register with the notches 40 in the completed form of
the corner pad.
The corner pad is assembled by folding the face panels 13 and 14
into right angular relation to the peripheral wall panels 10 and 11
as indicated in FIG. 3 of the drawings, and folding the cushioning
panel 21 to rest upon the face panel 13. The structure is then
folded along the center fold line 12 until the mitered edges 16 and
17 of the panels 13 and 14 are in edge abutting relation, and the
locking tongue 19 is pressed into the notch 20 so as to lie in the
same plane as the panels 13 and 14. The cushioning panel 22 is
folded upon the face panel 14, the edges of the cushioning panels
21 and 22 resting against the inner surfaces of the wall panels 10
and 11. The reinforcing panels 31 and 32 are then folded down into
face contact with the wall panels 10 and 11, the edges of these
reinforcing panels overlying the edges of the cushioning panels 21
and 22 to hold these cushioning panels in face contact with the
face panels 13 and 14. The locking tongues 41 are then flexed
through the notches 40 to prevent the return folding of the
reinforcing panels, and to hold them in spaced contact with the
surfaces of the wall panels 10 and 11.
While the locking tongues 41 extend slightly beyond the peripheral
walls 10 and 11, these tongues have a tendency to flatten out when
the corner pad is inserted between an article being packaged and
the walls of the container. The disengagement of the locking
tongues 41 from the notches 40 at this point is unimportant, in
view of the fact that the peripheral walls and the reinforcing
walls are held together by engagement between the article packed
and the container.
FIGS. 5 and 6 of the drawings show a slightly modified form of
corner pad construction. The entire blank is identical to that
shown in the FIG. 4 with the exception of the cushioning panels,
these modified cushioning panels being identified as 21a and 22a,
the remaining panels having similar identifying numbers to that of
the previously described pad. The mitered edges 42a and 43a, which
correspond to the mitered edges 42 and 43 of the pad A, also
include interlocking means. A locking tongue 44 projects from the
mitered edge 43a and is designed to lock into a similarly shaped
notch 45 in the mitered edge 42a of the panel 21a. Thus, the
cushioning panels as well as the face panels are interlocked as an
additional precaution against unfolding.
As will be obvious from the foregoing description, the corner pads
may be quickly set up and locked and will remain in condition for
use up until the time the pads are used. Accordingly, it is not
necessary to assemble the pads simultaneously as the article is
packed, and it is only necessary to insert the assembled pads in
position to protect the article packaged, the corner pads being
held in proper angular relation by the locking tongues
described.
* * * * *