U.S. patent number 3,900,157 [Application Number 05/452,601] was granted by the patent office on 1975-08-19 for tub file.
Invention is credited to Herman P. Roth.
United States Patent |
3,900,157 |
Roth |
August 19, 1975 |
Tub file
Abstract
A structure manufactured from a single flat sheet of material
which may be folded together into a relatively small, compact
packaged configuration for transportation and storage, and
assembled together into a convertible box-tub configuration. In the
box configuration the structure is generally rectangular. In the
tub configuration the sides are splayed outwardly so as to permit
easy access to the contents in the interior of the structure.
Inventors: |
Roth; Herman P. (Manhattan
Beach, CA) |
Family
ID: |
23797134 |
Appl.
No.: |
05/452,601 |
Filed: |
March 19, 1974 |
Current U.S.
Class: |
206/737; 220/7;
229/101; 229/112; 229/117.13; 229/123; 229/125.19; 229/165;
229/167; 229/193; 229/194; 229/198; 211/126.1 |
Current CPC
Class: |
B65D
5/0005 (20130101) |
Current International
Class: |
B65D
5/00 (20060101); B65D 5/355 (20060101); B65d
005/20 () |
Field of
Search: |
;229/16D,1.5R,30
;206/44B,74 ;211/132,126 ;220/7 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moorhead; Davis T.
Claims
I claim;
1. A structure comprising:
a generally flat, single unitary shaped panel having a plurality of
subpanels defined therein, said subpanels including a generally
rectangular base subpanel having two side edges and two end edges,
a first side subpanel flexibly attached to one of said side edges,
a second side subpanel flexibly attached to the second of said side
edges, a first end subpanel flexibly attached to one of said end
edges by a first flexible hinge, a second end subpanel flexibly
attached to the second of said end edges by a second flexible
hinge, each of said first and second side subpanels being generally
rectangular and having two longitudinal edges and two transverse
edges, four flap subpanels, each of said flap subpanels being
flexibly attached to a said transverse edge, said transverse edges
being generally colinear with said end edges, said subpanels being
adapted to be folded together into a compact packaged configuration
and assembled into a convertible box-tub configuration, said first
and second flexible hinges being elongated to accommodate the
folding of said first and second end subpanels over the combined
thickness of one of said flap subpanels and one of said side
subpanels, fastening means for holding said subpanels together in
said convertible box-tub configuration, said fastening means
permitting at least one of said side subpanels to move pivotally
about the said side edge to which it is flexibly attached between a
box configuration and a tub configuration.
2. A structure of claim 1 wherein the generally flat, shaped panel
is a single unitary sheet of corrugated board, the subpanels being
defined by crease lines in said single unitary sheet.
3. A structure of claim 1 wherein the generally flat, shaped panel
is a single unitary sheet of synthetic plastic, the subpanels being
defined by thin sections of said single unitary sheet, said thin
sections forming the flexible attachments between said
subpanels.
4. A structure of claim 1 including a generally rectangular box top
adapted to close a generally rectangular open top side defined by
said structure in the box configuration and to completely contain
said structure when said structure is in the compact packaged
configuration.
5. A structure of claim 1 wherein the first side subpanel and the
second side subpanel have about the same width, and the first end
subpanel and the second end subpanel have about the same width, the
width of said first and second side subpanels being less than the
width of said first and second end subpanels.
6. A structure of claim 1 wherein the width of the first and second
side subpanels is less than the width of the generally rectangular
base subpanel.
7. A structure of claim 1 including a pin element located in each
of the first and second end subpanels, each of the four flap
subpanels having a slot defined therein, a first said pin element
being located in said first end subpanel and passing through both
the slot defined in a first of said flap subpanels and the slot
defined in a second of said flap subpanels, a second said pin
element being located in said second end subpanel and passing
through both the slot defined in a third of said flap subpanels and
the slot defined in a fourth of said flap subpanels.
8. A convertible box-tub structure of claim 1 wherein the fastening
means includes means for locking said structure in the box
configuration.
Description
Most businesses require the storage for extended periods of time of
inactive papers and files. Some containers must be provided for
storing such papers and files so as to permit organized access to
these inactive documents as well as to protect them from loss and
deterioration. Often the empty storage containers occupy as much
space when they are empty as they do when they are full, which
creates a serious problem in the storage and transfer of such
containers. Also, generally, such containers have a rectangular
configuration which provides the most desirable configuration for
packing a plurality of such containers into an available storage
space. However, when it is desired to gain access to the contents
of the rectangular storage container, difficulty is encountered if
the container is packed to its full capacity with files and
papers.
In most business and professional operations records often appear
on more or less standard sized sheets of paper. For convenience,
light cardboard filing folders are often used for segregating,
identifying, and storing of limited groups of papers. Collections
of filing folders are typically stored in multidrawer filing
cabinets, or in transfer cases or boxed when in dead storage.
It is often desirable to keep one or more groups of such folders
conveniently available in a suitable container. This facilitates
quick finding of a given folder, easy examination of its contents,
and its expeditious return to its logical place or sequence in a
group.
This type of operation is aided by a container which is
conveniently described as a desk-top tub file. Such a file is
generally an open top box of a width accommodating a given folder
size. It has vertical end panels and slanted front and back panels.
These permit tilting the folders, individually or by groups,
forward or backward, since the front-to-back dimension of the top
opening is greater than that of the bottom. This aids easy reading
of the captions on the folder tabs and convenient examination in
situ of the contents of individual folders. Also, removal of a
chosen folder leaves a V-shaped space to which it may be quickly
returned, preserving its sequential relationship within the
group.
This kind of tub file occupies approximately 60 percent more space
than that required by the number of folders it will accommodate as
a full load. Such tub files typically include no provision for
covering to exclude dust. Such tub files are generally rigid
structures which occupy as much area when empty as when full. In
general these tube files are unsuitable for use as long-term
storage containers.
These and other difficulties of the prior expedients have been
overcome according to the present invention which provides a
structure which can be folded into a compact packaged configuration
for transportation and storage and which can be assembled together
rapidly by inexperienced personnel into a convertible box-tub
configuration. In the box configuration the structure has the
rectangular shape which is most desired for storage, and in the tub
configuration the sides of the structure are pivoted outwardly
along their lower edges so that the top of the structure is much
wider than the bottom. This permits the container to be packed full
in the box configuration so as to secure the maximum storage
capacity, while at the same time permitting easy access to and
handling of the contents of the structure in the tub configuration.
In general, a cover or box top is provided for the structure in the
box configuration. This prevents dust from settling into the
contents of the structure through the open top. The box top also
provides a convenient container for the structure in the compact
packaged configuration. Also, the rectangular box top provides a
broad supporting surface upon which other storage containers may be
stacked when the structure is in the box configuration.
The structure is arranged so that it may be formed from a single
sheet of material. When so fabricated, hinge and fold lines are
defined in the single unitary panel so as to define various
subpanels. The side subpanels are hingedly mounted to the opposed
edges of the base subpanel so as to permit the pivoting of the side
subpanels between the box and the tub configurations. Flap
subpanels project outwardly from the opposed transverse edges of
the side subpanels, and end subpanels are attached to the opposed
end edges of the base subpanels. The transverse edges of the side
subpanels and the end edges of the base subpanels are generally
coextensive so that when the flap subpanels and the end subpanels
are folded together in a right angle relationship with respect to
the subpanels to which they are attached, one end of the
convertible box-tub configuration is defined by the combination of
two of the flap subpanels and one of the end subpanels while the
other end of the convertible box-tub structure is defined by the
remaining two flap subpanels and the remaining end subpanel. Slots
are provided in the flap subpanels which register with one another
in the convertible box-tub configuration. A pin element is passed
through the slots and through the end subpanels so that the
structure is held together in the convertible box-tub
configuration. The slots permit the flap subpanels to move in their
own planes relative to the pin and parallel to the plane of the end
subpanel. Since the flaps are projected at approximately right
angles to the side subpanels, movement of the flaps, as
accommodated by the slots, permits the side subpanels to pivot
about the hinge line defined between the side edge of the base
subpanel and the longitudinal edge of the side subpanel. This
results in opening the open top of the convertible box-tub
configuration outwardly so that the structure assumes the tub
configuration.
Handholds are provided as desired by cutting them into the single
flat, shaped unitary panel of which the structure is composed. If
desired, the edges of the side subpanels may be stiffened by the
addition of suitable stiffening structures.
The panel from which the structure is formed may conveniently be
corrugated cardboard or synthetic plastic. When corrugated
cardboard is employed, the fold and hinge lines are conveniently
defined by creasing the corrugated board. When synthetic polymeric
plastic materials, such as polyethylene or polypropylene, are
utilized to form the sheet, the fold and hinge lines may be defined
by thinning the sheet at the locations where fold and hinge lines
are desired or thickening where added stiffness is desired.
In the embodiments illustrated in the drawings:
FIG. 1 is a perspective view of one embodiment of the invention in
the tub configuration;
FIG. 2 is a cross-sectional view taken along line 2--2 in FIG.
1;
FIG. 3 is a cross-sectional view taken along lines 3--3 in FIG.
1;
FIG. 4 is a partial elevational view taken along line 4--4 of FIG.
3 showing a portion of the structure in the box configuration;
FIG. 5 is a cross sectional view similar to FIG. 2 showing the
structure in the box configuration;
FIG. 6 is a view similar to FIG. 4 showing the structure in the tub
configuration;
FIG. 7 is a plan view showing the structure as a single, unitary
flat panel;
FIG. 8 is a cross-sectional view taken along line 8--8 in FIG.
7;
FIG. 9 is a perspective view of a box top;
FIG. 10 is a perspective view of a further embodiment of the
structure in the box configuration;
FIG. 11 is a cross-sectional view taken along line 11--11 in FIG.
10;
FIG. 12 is a cross-sectional view similar to FIG. 11 except that
the structure is in the tub configuration;
FIG. 13 is a cross-sectional view taken along line 13--13 in FIG.
12; and
FIG. 14 is a fragmentary side elevational view partially in cross
section of a further embodiment wherein two fastening devices are
used at each end of the structure.
Referring particularly to the drawings, there is illustrated
generally at 10 a flat, shaped panel composed of a single unitary
sheet (FIG. 7). The structure is provided with a plurality of
subpanels. A rectangular base subpanel 12 is provided with a first
side edge 14 which is attached to flexible hinge 16. Second side
edge 18 of rectangular base subpanel 12 is attached to flexible
hinge 20. First end edge 22 of rectangular base subpanel 12 is
attached to flexible hinge 24, and second end edge 26 of
rectangular base subpanel 12 is attached to flexible hinge 28.
First side subpanel 30 is attached at first longitudinal edge 32 to
flexible hinge 16. Third longitudinal edge 34 of first side
subpanel 30 is reinforced with edge stiffener 98. First transverse
edge 36 of first side subpanel 30 is attached to flexible hinge 38,
and second transverse edge 40 of first side subpanel 30 is attached
to flexible hinge 42.
Second side subpanel 44 is provided with second longitudinal edge
46 which is attached to flexible hinge 20. Fourth longitudinal edge
48 of second side subpanel 44 is reinforced with edge stiffener
100. Third transverse edge 50 of second side subpanel 44 is
attached to flexible hinge 52, and fourth transverse edge 54 of
second side subpanel 44 is connected to flexible hinge 56.
Flexible hinges 16,20,24,28,38,42,52, and 56 are generally
coextensive with the edges to which they are affixed. In the
embodiment illustrated in FIGS. 1 through 8, the respective
flexible hinges are formed by thinning a section of the panel, as
is illustrated by typical flexible hinge 28 in FIG. 8.
First and second side subpanels 30 and 44, respectively, are
constructed so that they have generally the same width and length,
and they are attached to opposed side edges of the rectangular base
subpanel 12.
Frist end subpanel 58 is attached at first base edge 60 to flexible
hinge 24. Second end subpanel 62 is attached at second base edge 64
to flexible hinge 28.
First flap subpanel 66 is connected by attached edge 68 to flexible
hinge 38. The perimeter of first flap subpanel 66 is defined by
attached edge 68, first free edge 70, and second free edge 72.
Second flap subpanel 74 is connected at attached edge 76 to
flexible hinge 42. The perimeter of second flap subpanel 74 is
defined by attached edge 76, first free edge 78, and second free
edge 80. Third flap subpanel 82 is secured at attached edge 84 to
flexible hinge 52. The perimeter of third flap subpanel 82 is
defined by attached edge 84, first free edge 86, and second free
edge 88. Fourth flap subpanel 90 is connected by attached edge 92
to flexible hinge 56. The perimeter of fourth flap subpanel 92 is
defined by attached edge 90, first free edge 94, and second free
edge 96.
Second end edge 26 of rectangular base subpanel 12, second
transverse edge 40 of first side subpanel 30, and fourth transverse
edge 54 of second side subpanel 44 are generally colinear with one
another. Likewise, first end edge 22, first transverse edge 36, and
third transverse edge 50 are generally colinear with one
another.
In order to convert the planar structure depicted in FIG. 7 into
the structure depicted in FIG. 1, the panel is assembled together.
In this assembly procedure each of the flap subpanels 66,74,82, and
90 is folded upwardly out of the plane of FIG. 7 through an arc of
approximately 90.degree.. End subpanels 58 and 62 are likewise
folded upwardly out of the plane of FIG. 7 through an angle of
approximately 90.degree.. Folding accommodated by flexible hinges
22,28,38,42,52, and 56. Side subpanels 30 and 44 are then folded
upwardly out of the plane of FIG. 7 through an arc slightly less
than 90.degree.. Fasteners 106 and 108 are then inserted to hold
the structure in the convertible box-tub configuration. As
illustrated in FIG. 3, each of fasteners 106 and 108 is provided
with a nut 109 and a spring 111. This provides a frictional locking
mechanism for holding the structure in the desired configuration.
Expansion slots 110, 114, 118, and 122 are provided in the
respective flap subpanels, and arcuate movement accommodation slots
126 and 128 are provided in the respective end subpanels. In the
convertible box-tub configuration, the fastener 106 passes through
expansion slot 110, 118 and arcuate movement accommodation slot
126. Fastener 106 acts as a pin which holds one end of the
structure together and also in cooperation with the terminal
portion of the expansion slots limits the arcuate movement of the
respective side subpanels as they move in the convertible box-tub
configuration between the box configuration and the tub
configuration. Fastener 108 serves the same function with expansion
slots 114 and 122 and arcuate movement accommodation slot 128.
Each of expansion slots 110, 114, 118, and 122 is provided at the
terminus of the slot which is closest to the attached edge of the
flap subpanel in which the expansion slot occurs with short angular
slots 112,116,120, and 124, respectively. These angular slots
provide, in combination with fasteners 106 and 108 and slots 126
and 128, a locking device to hold the structure in the box
configuration. To accomplish the locking function, the side
subpanels 30 and 44 are brought to the box configuration, as
illustrated particularly in FIGS. 4 and 5, and the fastener is
moved into the angular slots. The arcuate movement accommodation
slots 128 and 126 are extended so as to permit this movement. When
the fasteners 106 and 108 are in the angular slots, it is
impossible to pivot the side subpanels 30 and 44 about their
respective longitudinal edges 32 and 46. To release the structure
from this configuration, the fasteners 108 and 106 are raised
upwardly until they are positioned in the expansion slots.
The embodiment illustrated particularly in FIGS. 1 through 8 is
particularly adapted for construction from a sheet of synthetic
polymeric material, such as polypropylene. This embodiment may be
conveniently formed by injection molding. The embodiment depicted
particularly in FIGS. 9 through 13 is especially adapted to be
constructed from corrugated board.
Referring particularly to FIGS. 9 through 13, a rectangular cover
or box top is indicated generally at 130. Box top 130 is provded
with a first end 132 through which a handhold 134 has been cut.
Second end 136 is also provided with a handhold 138. First side
subpanel 140, second side subpanel 142, and top panel 144 complete
the structure of box top 130. Box top 130 is adapted to be placed
over the open top side of the convertible box-tub structure
indicated generally at 146, when it is in the box configuration.
The convertible box-tub structure 146 is assembled from a single
panel of material as has been previously described in reference to
FIG. 7. The box-tub structure 146 is provided with first and second
ends 148 and 150, respectively, and first and second sides 152 and
154. First end 148 is substantially identical in structure to
second end 150. Also, first side 152 is substantially identical in
structure to second side 154. The box-tub structure 146 is
generally symmetrical about a plane passed longitudinally through
the midpoint of the structure parallel to the sides and also about
a plane passed the midpoint of the structure parallel to the ends.
Bottom panel 155 closes the bottom of box-tub structure 146. The
ends of box-tub structure 146 will be described only with reference
to second end 150 since it is substantially identical to first end
148. Outer end subpanel 156 projects upwardly in a generally
perpendicular relationship from bottom panel 155. Outer end
subpanel 156 is folded over at its upper terminus so that it
extends longitudinally toward first end 148 for a short distance
and is then folded again so that it extends downwardly toward
bottom panel 155 in a generally parallel relationship with outer
end subpanel 156. The downwardly extending portion is identified as
inner end subpanel 158 which terminates short of bottom panel 155.
Together, outer and inner end subpanels 156 and 158 define a deep
U-shaped channel which guides and frictionally controls movable
subpanels 160 and 162. A first movable subpanel 160 projects in
generally perpendicular relationship from first side 152 into the
space defined between outer end subpanel 156 and inner end subpanel
158. Second movable subpanel 162 projects generally perpendicularly
from second side 154 into the space defined between outer end
subpanel 156 and inner end subpanel 158. Thus, in the receptacle
defined between outer end subpanel 156 and inner end subpanel 158
first movable subpanel 160 overlaps second movable subpanel 162.
Thus, in large slot 164 in first movable subpanel 160 and in large
slot 166 in second movable subpanel 162 are brought into
registration with one another so that internally threaded screw 168
and externally threaded screw 170 may be passed through the portion
of the enlarged slots 164 and 166 which are in registration with
one another. In this embodiment the enlarged slots 164 and 166 are
of such a width that they will accommodate arcuate movement without
the necessity of providing vertical slots in the outer end subpanel
156 and inner end subpanel 158. In the embodiments depicted
particularly in FIGS. 1 through 8, the slots are approximately the
same width as the fasteners so that the arcuate movement of the
flap subpanels 66,74,82, and 90 must be accommodated by slots 126
and 128 which permit the respective fasteners to move up and down
as the arcuate movement of the slots dictates. The screws 168 and
170 are provided at their heads with outer washer 172 and inner
washer 174, respectively. These washers together with the natural
resiliency of the preferred corrugated board material provide
necessary frictional resistance to undesired pivotal movement of
sides 152 and 154. The washers 172 and 174 are large enough to
provide a substantial bearing area on the corrugated carboard
material. Folding of the various subpanels along the desired
flexible hinge lines is provided by creasing the corrugated board
at the desired fold location. Such creases are indicated, for
example, at 176,177,179. A handhold is cut into outer end subpanel
156. This is designed to register with one of the handholds 138 or
134 in box top 130. The handhold 178 does not extend through inner
end subpanel 158. Thus, the interior of the structure 146 remains
as sealed as possible from dirt, dust, and debris.
A stiffener 180 is provided on the upper unsupported longitudinal
edges of the sides 152 and 154. The stiffener is formed by folding
over the edge of the side and gluing it down to the surface of the
side.
The structure is proportioned, as illustrated particularly in FIG.
11, so as to provide a structure which can be sealed as tight as
possible in a box configuration, while at the same time being
collapsible into a compact packaged configuration for
transportation and storage. The inside width 182 of box top 130 is
wider than the bottom outside width 188 of bottom panel 155. The
inside depth 184 of box top 130 is slightly greater than the
extended height 185 (FIG. 13) of outer end subpanel 156. This
permits the free edges of box top 130 to extend down slightly over
the free edges of sides 152 and 154. The outside height of sides
152 and 154 is less than inside width 182. The proportioning of the
box-tub structure 146 for purposes of being collapsed into a
compact package configuration will be illustrated by reference to
FIG. 7. It is understood that alternative folding procedures may be
utilized for collapsing the structure to a compact package
configuration. One suitable procedure for each of the embodiments
specifically illustrated in the drawings commences with panel 10 in
the flat configuration illustrated in FIG. 7. Each of the flap
subpanels 66 and 74 is folded upwardly out of the plane of FIG. 7
along the respective flexible hinges 38 and 42 through an arc of
approximately 180.degree. so that the surfaces of the flap
subpanels 66 and 74 rest on the surface of first side subpanel 30.
Third and fourth flap subpanels 82 and 90, respectively, are folded
downwardly out of the plane of the FIG. 7 drawing, along flexible
hinges 52 and 56 through an arc of approximately 180 degrees until
the surfaces of the third and fourth flap subpanels rest against
the surface of second side subpanel 44. Side subpanel 30 is folded
along flexible hinge 16 downwardly out of the plane of the drawing
of FIG. 7 through an arc of approximately 180.degree. until the
surface of first side subpanel 30 is resting upon the surface of
rectangular base subpanel 12. Second side subpanel 44 is folded
upwardly out of the plane of the drawing of FIG. 7 along flexible
hinge 20 through an arc of approximately 180.degree. until the
surface of second side subpanel 44 rests on the surface of
rectangular base subpanel 12. First and second end subpanels 58 and
62, respectively, are then folded upwardly out of the plane of the
drawing of FIG. 7 through an arc of approximately 180.degree.
around flexible hinges 24 and 28, respectively, until the surfaces
of the respective end subpanels are in contact with the surfaces of
third and fourth flap subpanels 82 and 90, respectively. The
flexible hinges 28 and 24 are preferably elongated somewhat to
accommodate the folding of the end subpanels over two thicknesses
of sheet material. In the corrugated board configuration this is
accommodated by providing an extra crease in the outer end subpanel
156. Where a more rigid material is utilized, it is necessary to
elongate the flexible hinge portion of the sheet. If desired, the
folding of the end subpanels in the package configuration may be
omitted. The resultant package is lengthened by the length of the
end subpanels, but structural problems with the folding are
avoided. When the structure is completely folded into its package
configuration with the end subpanels folded over through an arc of
180.degree., the entire package may be inserted into box top 130,
thus providing a very compact, convenient, and attractive
package.
In the specific embodiment illustrated in FIGS. 1 through 8, the
limits of the arcuate excursion of the side subpanels as they pivot
about their respective longitudinal edges are defined by the length
of the expansion slots. The ends of the expansion slots together
with the fasteners define the limits of the arcuate excursion of
the side subpanels in either the box or tub configurations. In the
specific embodiment illustrated in FIGS. 9 through 13, the ends of
the enlarged slots define the limit of the arcuate excursions of
the sides 152 and 154 in the tub configuration. In the box
configuration the lower edges of the movable subpanels 160 and 162
come to rest upon the upper surface of bottom panel 155, which
serves to limit the arcuate excursion of the sides 152 and 154 in
the box configuration.
In the embodiment specifically illustrated in FIG. 14, end subpanel
190 is operably associated with first flap subpanel 192 and second
flap subpanel 194. These first and second flap subpanels do not
overlap one another. First fastener 196 extends through end
subpanel 190 and first expansion slot 200 in first flap subpanel
192. Second fastener 198 extends through end subpanel 190 and
second expansion slot 202 in second flap subpanel 194. Expansion
slots 200 and 202 are generally rectangular in shape and
sufficiently larger than fasteners 196 and 198 so that the
necessary space for the arcuate movement required during the
conversion between the tub and box configurations is provided.
* * * * *