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Патент USA US2410700

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NOV; 5, 1946.
Fiyled Feb. 26, 1943
2 Sheets-Sheet i
NOV- 5, 1946-
File? Feb'. 26, 1945
2 Sheets-Sheet 2
Patented Nov. 5, 1946
Philip Zalkind, New York, N. Y.
Application February 26, .1943, Serial No. 477,204
3 Claims. (01. 312-111)
My present invention relates to collapsible con
tainers of the casing and drawer type adapted
to coact to form file cabinet sections which may
be stacked one upon the other.
A channel shaped reinforcing member 55' pref
erably of metal is clamped over the forward mar
gin of the top wall and serves to rotatably secure
at each end thereof one leg of each of the angle
A principal object of my invention is the pro
vision of interlocking elements for collapsible
wires 51, 51.
casing and drawer combinations.
pendent, thus each having a leg which is rotate
ably captured by the reinforcing member 55, or
the angle wire members may be formed from a
Another object of my invention is the forming
of such interlock elements in such manner that
The opposite angle wires El, 51 may be inde
they may cooperate with non-metallic reinforcing 10 single U-shaped wire, the base of which extends
along the entire length of channel 56 and the.
An additional object of my invention is the’
projecting legs of which rotate together. The;
arrangement of various interlocking members for
angle wires 51 may‘ be utilized to maintain the
interengaging the reinforcing structure of verti
walls of the casing in rigid angular relation in
cally and horizontally adjacent cabinets in order 15 the manner described in my Patent No. 2,118,011.
to lock the same in stacked formation.
While it is preferred that the channel shaped
' These and many other objects of my invention
reinforcing member 55$ be of metallic material,
will in part by apparent and where not apparent
it may be of any other suitable material adapted
will be pointed out in the following description
to engage the angle wire member 57, 5'1 in a
and drawings, in which:
20 manner to permit rotation thereof and I am thus
Figure 1 is a View in‘ perspective showing the
not necessarily limited to metal in the formation
front of a casing member embodying the rein
forcing structure of my present invention.
The vertical reinforcing members to, fill each
Figure 2 is a view corresponding to that of
consists of a rigid longitudinal strip secured in
Figure 1 showing one of the reinforcing members 25 any suitable manner as, for’ instance, by adhesive,
disengaged preliminary to- collapse.
to one of the extensions 6!, (it of the respective
Figure 3 is a View in perspective corresponding
side walls 53 and 52, which are separated there
to those of Figures 1 and 2 showing all of the
from by the fold lines‘ 62, 62.
rein orcing members disengaged preliminary to
While it is preferred that the extension 6!, (it
30 be integral with the side walls in order to econo-i
Figure 4 is a view in perspective of the casing
mize in the manufacturing processes, it is obvious
structures of Figures 1-3 in collapsed condition.
that the said extension El may be hingedly se
Figure 5 is a cross-sectional view taken on line‘
cured to the forward margins of the walls 52
5—5 of Figure 3 locking in the direction of the
and 53 in any other suitable manner. ,
arrows and showing one method of attachment 35
The bottom reinforcing member 613 may be se
of the vertical reinforcing members.
cured to the bottom wall 5Q in substantially the
Figure 6 is a fragmentary enlarged View of a
same manner as are the vertical reinforcing
corner of my casing showing one form of my
members 6B, 6!} secured to their walls. That is,
an extension 58 from the bottom wall Ell either
interlock element.
Figure ,7 is a View in perspective of an interlock 40 , integral therewith or otherwise hingedly secured
bar for cooperation with my interlock element.
thereto carries secured thereon, preferably by
Figure 8 is a view in perspective of a preferred
adhesive, the reinforcing member 64. When the form of interlock element disassociated from the
extension 58 and reinforcingmember Eli are then
folded up around the hinging line to into the
Figure 9 is a view in perspective of the upper 45 interior of the casing, the bottom reinforcing
right-hand corner of the casing of Figure 3 before
member serves to provide a spacing and reinforc
the interlock element has been‘integra'ted there'
ing means for the bottom of the casing.
The manner by which the'various reinforcing
Figure 1c is a cross~sectionai view taken on
elements cooperate to interlock each other and
line iii-la‘! of Figure 6 looking in the direction 60 maintain the casing in erected condition will best
be understood from an explanation of‘the method
of the arrows.
Figure 11 is‘ a view in‘ perspective of a’slightly
of erecting the casing from the collapsed condi
modified form of interlock element shown at-jv
tion of Figure 4 to the erected‘ condition of Fig‘
tached to the casing.
ure 1.
Figure 12-is a view in perspective of the inter 55 The collapsed casing member of Figure, 4 is
lock element of Figure 11.
?rst'unfolded tov the form shown in Figure 3.
Referring now to Figures 1 to 4; I have here
The angle wires 51, v5'! are then rotated down
shown a collapsible casing member 58 constructed
wardly inside the extensions s: so that they co
incide with the fold lines 62, 62. The vertical
in accordance with my invention'having' atop"
wall 5!, side walls52~and 53“and bottom wall 54; 60 reinforcing members 60, til are ‘then folded‘ in:
wardly around the angle wires 51, 5‘! so that the
ing the slots H5 and H6 at the top and bottom
casing then assumes the form shown in Figure~2.
The bottom reinforcing member 64 is then
of the member II 3 thus forming a single socket.
In order that the entire element may be formed
folded inwardly from the position shown in Fig
from a single piece of material by ordinary die
ure 2 to the position shown in Figure 1 where the
operating means, the sections I09 and I 00 at a
lower level are provided with grooved sections
notches 61, 61 bear against the lower ends of the.
vertical reinforcing members 60, 60.
The lower reinforcing member 64 is a tight
frictional ?t between the vertical reinforcing
I20 and I2I which take up all the surplus mate
rial which is left when the sections I09 and I08
and their associated legs I04 and I05 are lowered
members 60, 60 and is thus securely held therein. 10 , beneath the plane of the section I I3. The height
Further, when the drawer is in place within the
of the legs I04 and I05 is substantially equal to
casing, the weight of the drawer resting on they
the thickness of the wall of the casing.
lower reinforcing member 64 serves further to
Accordingly, the sectitons III] and III of the
maintain the same in position.
central legs will project beyond the opposite side
The casing walls are maintained at the open
of the wall of the container, when the interlock
front end in rigid angular relation by means of
ing member I00 is positioned opposite a slot in
the rigid angle wires, one leg of each of which is
the container wall, while the outer surfaces of
now captured in the upper horizontal channel 56
the flanges IOI and I02 rest against one surface
and the other leg of which is captured between
of the side wall.
the extensions BI and their respective associated 20
As seen in Figures 6 and 9, when the side
walls. The reinforcing, members 60, 60 carried
flanges I ill and I02 are positioned against the
by the extensions 6|, III are held in place by the
wall of the container on the opposite sides of the
abutment between them of the lower reinforcing
slot I 30 therein, any suitable securing means such
member 64.
as the prongs I3! and I32 may be used to secure
Accordingly, when the lower reinforcing mem 25 the flanges IOI and I02 against the inner surface
ber 64 is in place, the vertical reinforcing mem
of the container while the element II3 projects
bers cannot move out of their erected position.
beyond the outer side thereof.
Since these members cannot move out of posi
The prongs I3I and I32 may serve as sui?cient
tion, the angle wire legs are rigidly held both with
positioning elements and no additional position
respect to the top wall and the side walls thus
ing elements may be needed and consequently no
maintaining the walls at the open end of the eas
additional formation shaping of the slot I30 is
ing in rigid angular relation.
Various materials may be utilized for these re
However, as shown in Figure 9, the slot I30 may
inforcing members. Thus I have found that r..
be provided with a crescent-shaped cut-out I35
inforcements made of cardboard or of corrugated 35: communicating with the lower end thereof and
board or of laminations thereof may be su?icient
a tongue I36 hingedly connected at I37 to the up
to provide compressive strength. In larger struc
per end thereof, the said tongue being formed by
tures, stronger or stiffer ?brous structures such
omitting the cut at the upper end I31 of the slot.
The interlocking element of Figure 8 is then
as wood, plywood, veneers, paper board or pressed
pulp materials may be used.
40, mounted on the inner side of the container with
In my commercial structures I have found that
the elements I09, H3 and I08 pressed outwardly
hard board furnishes a good result both with re
through the slot I30 so that the element H3 pro
spect to strength and appearance.
jects beyond the outer surface of the wall and
In Figures 1-4 the bottom reinforcement is
the tongue I36 with its wide bottom member I00
shown as having a form adapting it to be per 45; pushed back behind the interlocking element into
the slot.
manently secured to the casing and folded there
into when the casing is erected. I have. found
Accordingly, as seen in Figure 6 the interlock
that a tight frictional ?t between the vertical re
ing element is then anchored by the tongue I36 .
inforcing members plus the securement of the
and its lower anchoring element I00. Since the
extension 58 which supports the lower reinforcing 50, lateral extensions of the lower anchoring element
member 64 at the fold line 65 to the bottom wall
I40 extend beyond the lower ends of the legs I04
54 will serve to maintain the lower reinforcing
and I05, they serve to prevent the interlock ele
members of Figures 1-4 in place irrespective of
ment from slippingv down or out of the slot.
' any longitudinal stresses which may be exerted
In actual practice, I have found, however, that
thereon by the sliding movement of the drawer.
55', the utilization of the tongue I 36 and the anchor
As seen in Figure 5, the extension 6i is an in
ing element I00 may be unnecessary and the slot
tegral extension of the side wall 53, being con
I 30 may be cut at the upper edge I 31, thus en
tirely removing the material.
nected at the fold line 62. The reinforcing mem
ber 60 is adhesively secured to the outer edge of
The socket forming element II 3, as has been
the extension 6| or it may be secured in any other
above pointed out, forms the socket or pocket
suitable manner.
having the open ends H5 and H6 which are
In Figures 6, 8, 9 and 10, I have shown the type
of interlocking member which has been applied
adapted to receive an‘interlccking bar. When
the anchoring element is mounted near the up
to Figures 1 to 4.
per end of the casing, the interlock bar is slid
fl’he interlocking member I00, as seen in Fig 65. in through the socket I I5. When the anchoring
ures 6 and 8, is a metallic member having secure
element is mounted adjacent the lower end of
ment ?anges IOI and I02 on each side of a socket
the casing, then the interlockbar is slid into the
de?ning section I03. The socket-de?ning section
lower socket element I I6.
I03 consists of a pair of opposite narrow legs I 0-’5,
Accordingly, when casings are arranged in
stacks with lower anchoringelements in each
I05 de?ning top and bottom sections I09 and
‘I08. The legs I00 and I05 are at their center ex
tended at H0 and III and are there bridged b
the socket-forming bridging member H3.
sections I09 and I08 are therefore lower than the
casing adjacent to the upper anchoring elements '
of the casing below, then when an interlock bar
is inserted in the bottom socket of the lower
anchoring element in therupper casing and in
socket forming bridging member II3, thus form 75 _ the upper socket of the upper anchoring’ element,
in the lower casing, it serves to interlock the
casings at those particular corners.
By arranging similar anchoring elements at
each of the four corners of the open front of
the casing and, where necessary, at each of the 5
forth in connection with the interlock elements
of Figures 6 to 10. Here again the ?ange ['15
may be provided with an extension E80 separated
from the ?ange E75 by means of a groove ME.
The groove 181 provides a metallic bearing sur
face for the angle wire 57, preventing it from
tearing the paper at the hinge line 62.
In each of the foregoing I have described my
invention in connection with ‘speci?c preferred
not merely for use at the margins of the casing
members but may also be used along the side 10 embodiments thereof. Many variations in the
form and arrangement of each of these members
walls intermediate the margins or at any other
should now be obvious to those skilled in the
portion of the casing where it is desired to eifect
art. Accordingly, I prefer to be bound not by the
an interlock between that casing and the adjacent
speci?c disclosures herein but only by the ap
pended claims.
The interlock bar which may be used is that
shown in Figure 7. The interlock bar 50 has an
1. An interlock element to be secured to a wall
upwardly extending tongue element l5! and a
four corners of the rear of the casing, full an
choring of the casing is obtained.
‘Obviously, this form of interlock lends itself
of a container; said element comprising a section
lower element I52 which are adapted to be in
having outer bridging elements and opposite
serted in the sockets H5 and H0. The inter
lock bar also has a central shoulder portion I54 20 parallel supporting legs; said legs at the central
region of said section being higher than the por
which positions the bar with respect to the socket;
tions of said legs adjacent the ends thereof;
certain of said bridging elements connecting said
opposite legs at the ends of said section; and
may serve to carry the weight of the casing
against the margins of the socket.
25 one of said bridging elements connecting said
opposite legs at the central region; said central
The central shoulder portion 154 is provided
bridging element being in a plane spaced out
with an outstanding lug I56 which may inter
wardly from that of the end bridging elements;
lock with a similar lug on an adjacent interlock
said central bridging element and the higher
bar in an adjacent stack and inverted in order
horizontally to integrate the stacks.
30 portions of the legs de?ning a socket open at
either end of said central bridging element.
This type of interlock is also shown in my
2. An interlock element to be secured to a wall
Patent No. 2,245,026 as well as in the interlocking
of a container; said element comprising a section
element of my Patent No. 2,210,019.
that is, the shoulder portion prevents the bar
from falling downwardly into the socket and
By appropriate shaping of the socket element,
having outer bridging elements and opposite
any peg, pin, wire, splint, strip or slat may be 35 parallel supporting legs; said legs at the central
region of said section being higher than the
used as an interlock bar.
portions of said legs adjacent the ends thereof;
The interlocking element 100 may also be
certain of said bridging elements connecting said
utilized as a reinforcing element. Thus, for in
opposite legs at the ends of said section; and
stance, the ?ange l02 may have an extension
160 separated from the ?ange I02 by the groove 40 one of said bridging elements connecting said
opposite legs at the central region; said central
16!. The groove 16! may coincide with the hinge
bridging element being in a plane spaced out
line 62 of the casing. The extension I60 then
Iwardly from that of the end bridging elements;
coincides with the vertical ‘flap 6| of the casing.
said central bridging element and the higher
Thus when the ?ap BI is rotated inwardly, the
extension I60 is also rotated inwardly at the same 45 portions of the legs defining a socket open at
either end of said central bridging element; and
time. The curved groove ltl furnishes an even
bearing surface for the angle wire 57 which is I ?anges extending from the edges of the legs ‘op
posite said ‘bridging elements; said ?anges ex
thereby prevented from cutting the paper.
tending in a plane parallel to the planes of the
Accordingly, any speci?c reinforcement of the
interior of the hinge line 62 is made unnecessary 50 bridgingelements.
3. In a container; a vertical Wall; an opening
by reason of the fact that the extension of the
in said wall; an interlock element mounted on
interlocking member provides such reinforcement.
said wall; said element comprising a section hav
In the modi?ed form shown in Figures 11 and
ing outer bridging elements and opposite parallel
12, full utilization of the prongs for securing the
interlocking member is made without the use of 55 supporting legs; said legs at the central region
of said section being higher than the portions
any additional securing elements. The interlock
of said legs adjacent the ends thereof; certain
member 110 therein shown again ?ts into a slot
of said bridging elements connecting said op
III in the side wall of the casing. The slot III
posite legs at the ends of said section; and one
is here a simple cut-out in the side of the casing
adjacent the top and bottom thereof. The inter 60 of said bridging elements connecting said op
posite legs at the central region; said central
locking element which may cooperate with the
bridging element being in a plane spaced out
interlocking bar of Figure 7 consists of a channel
shaped portion 113 and outwardly extending
wardly from that of the end bridging elements;
said central bridging element and the higher
?anges IM and 115. These ?anges are provided
65 portions of the legs de?ning a socket open at
with prongs 116.
either end of said central bridging element; and
In the construction of the casing, the inter
?anges extending from the edges of the legs op
lock member is placed on the interior of the
posite said bridging elements; said ?anges ex
casing; the channel-shaped member 113 is pushed
tending in a plane parallel to the planes of the
through the slot ill to extend to the outward
side of the casing, while the flanges H4 and H5 70 bridging elements; said ?anges being secured to
said wall at the interior thereof; said section
bear against the inner surface of the wall of
projecting into said opening; the central por
the casing and the prongs I16 secure these ?anges
tion of said section extending beyond the outer
to the said inner wall.
surface of said wall.
The socket forming channel 113 may then be
utilized in exactly the same manner as that set 75
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