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Патент USA US3042122

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July 3, 1962
M. J. FORD ETAL
3,042,112
GRAIN DOOR AND METHOD OF FORMING
Filed Dec. 8, 1958
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ATTORNEYS.
United States Patent U
3,042,112
Patented July 3, 1962
1
2
3,042,112
Michael J. Ford, l-lartsdale, N.Y., and Barton H. Ford,
panel 12 and 13 is equipped with spaced-apart, ?at metal
straps 14 and 15, respectively. The straps 14 and 15 in
each panel 12 and 13 are arranged parallel to an edge of
the panel and are positioned interiorly of the panel as
GRAIN D0912 AND METHOD OF FDRMING
Omaha, Nehr., assignors, by mesnc assignments, of
one-half to International Paper Company, New York, 5 between a liner and the corrugated core. As illustrated,
N.Y., a corporation of New York, and one-half to The
the straps 14 are positioned between liner 12a and core
Stanley Works, New Britain, Conn., a corporation of
12c, while the straps '15 are positioned between the liner
Connecticut
13a and the core 13c. The straps 14 of panel 12 extend
Filed Dec. 8, 1958, Ser. No. 778,790
transversely of the direction of the ?utes, so that the
5 Claims. (Cl. 160-368)
This invention relates to a grain door and method of
forming the same, and, more particularly, to a closure for
a railway car doorway to prevent the escape of granular
10 straps are vertically disposed, as can be readily appreci
ated from a consideration of FIG. 1. The straps 15 of
panel 13 are likewise disposed transversely of the direction
of the ?utes in the corrugated core 130, and, also as seen
material from the car.
in FIG. 1, extend horizontally. Thus, the straps in the
An object of the present invention is to provide a grain 15 respective panels extend transversely of each other. Also,
door and method of forming the same whereby the door
as seen in the drawing, the straps are spaced inwardly of
the side edges of the panel to which they are parallel.
and employed with a minimum of labor and effort. An
The panel 12 is equipped with a portion 16 adjacent the
other object is to provide a method for fabricating a grain
top edge of the closure 11 that is folded on itself and is
door that lends itself to machine operations so that the 20 positioned interiorly of the inner side of panel ‘13. The
can be fabricated in an inexpensive manner and set up
door can be completely fabricated at low expense while
at the same time providing a door which may be installed
folded portion extends across the doorway D as seen in
. FIG. 1, and is secured to the posts '10‘ by means of nails
with important new advantages. A still further object is
or other securing means 17. The straps 15 are likewise
to provide a grain door which may be completely fabri
secured at their ends to the posts 10 by means of nails 18.
cated and equipped with reinforcing means at the site of 25 To facilitate this securement, the closure 11 may be
manufacture so that a minimum of work is entailed in
installation. Yet another object is to provide a novel
grain door and method of fabricating the same in which
equipped with openings extending therethrough in posi
tions suitable for the receipt of nails 18.
As illustrated, the panel 12 is equipped with a second
the door at the time of fabrication is equipped with edge—
reinforcing means that are effective to protect and main
tain the door during storage and handling prior to instal
lation and which serves to effectively bolster the door
when installed. Other speci?c objects and advantages will
folded portion 19 lying along the interior lower edge of
30 the closure 11.
The folded portion 19, like the folded
portion 16, is achieved by providing an extension or over
lapping portion in the panel .12 relative to the panel 13.
The overlapping portion, at an intermediate stage of
fabrication, is designated in FIG. 3 by the numeral 16a
appear as this speci?cation proceeds.
The invention is shown, in an illustrative embodiment, 35 relating to the top overlapping portion and the numeral
19a relating to the bottom overlapping portion.
FIG. 1 is a ‘fragmentary perspective view of a railway
ln the fabrication of the door, the corrugated panels 12
‘car interior and having a closure of the invention installed
and 13 may be provided from the same continuous web,
in the doorway thereof;
designated generally by the numeral 20‘ in FIG. 3. By
FIG. 2 is an enlarged cross-sectional view taken along 40 severing a portion of the web and disposing it transversely
the line 2—-2 of FIG. 1;
of the web to provide the panel designated 12 in FIG. 3,
FIG. 3 is a fragmentary elevational view of the closure
the closure 11 can be expeditiously formed. The web 20
in an intermediate stage of fabrication; and
is interiorly equipped with the straps 14 and 15, which
FIG. 4 is a sectional view, taken along the line 4-4 of
may be two inch wide bands of from 16 to 22 gauge sheet
by the accompanying drawing, in which—
FIG. 2.
In the illustration given, the letter A designates gener
ally a railway freight car such as is employed in the trans
port of grain. The car A is equipped with a ?oor desig
nated by the letter B and with walls C in which a door
45
steel. Once the parts are assembled, as seen in FIG. 3,
the panel 12 may be united to the web 20 by any suitable
means. Adhesively uniting the two parts 12 and 20 pro
vides a strong, integrated closure, and for that reason is
preferred. Thereafter, the web 20 may be transversely
way D is provided. The doorway D is de?ned in part by 50 severed to provide a closure 11 of the desired width. At
the vertical side posts ‘10 seen only in FIGS. 1 and 4. In—
this time, the overlapping portions 16a and 19a can be
stalled across the doorway D and secured to the inner sur
folded on themselves to provide the folded portions 16
faces of posts 10 is a closure of the invention, designated
‘and 19 seen best in FIGS. 1 and 2.
generally by the numeral 11.
In the operation of the invention, the completed clo
The closure 11 is a generally rectangular panel and
sure is provided usually equipped with the portion 16a in
includes two laminated panels 12 and 13 which are united
the condition seen in FIGS. 1 and 2. Optionally, the por
in superposed, face-to-face relation.
tion 19a may be left unfolded and when installed pro
vides a ?oor ?ap for the grain door. When folded in
Each panel 12 and 13, as illustrated, is a corrugated
paperboard panel having outer liners and a central corru 60 the form designated 19, the door is then equipped with
a pry-board in which the ?at metal straps 14 are con
gated core. As best seen in FIG. 4, the panel 12 is
veniently located near the outer surface of the pry-board
equipped with liners 12a and 12b, the liner 1212 being
so as to serve as bearing surfaces for a crowbar, or the
spaced inwardly of the posts 10. The corrugated core of
like, when the closure 11 is to be remove-d.
panel 12 is designated by the numeral 12c, and can be
The shipment and handling of the closure v11 is facili
best seen in FIG. 2 since the ?utes of the corrugations
~
tated
by the presence of the folded portion 16, since this
in core 120 extend horizontally. In similar fashion, panel
serves as a reinforcement member for the closure 11 to
13 is equipped with liners 13a and 131'), with liner 13b
conserve it against deformation. Preferably, at least one
providing the interior surface of the closure 11. Also,
of the panels is equipped with a corrugated core, this panel
panel 13 is equipped with a corrugated core designated by
0 being panel 13, in which the ?utes run transversely to
the numeral 130, which can be best seen in FIG. 4 inas
the reinforcing portion 16. The tendency in panel 13 is
much as the ?utes of the core extend vertically. Each
to collapse along lines parallel to the direction of the
'
42
9
o
tion of the flutes in the core of its associated panel, said
second panel having a dimension in the direction of its
poition 16.
straps longer than the dimension of the ?rst panel trans
By providing the corrugations in the panel 12 in the
verse of its straps to provide an overlapping edge portion
direction shown, folding of the overlapping portions 16a
and 19a is readily achieved. However, the advantages of Cl in said second panel, said overlapping edge portion being
?utes, and this is effectively opposed by the reinforcing
the invention can be achieved when the flutes of the cor
rugated core 120 run otherwise than shown, since fold
folded on itself to provide a closure reinforcing member
ing is readily accomplished if the corrugated core is slight
ly crushed along the lines of folding.
2. The structure of claim 1 in which the straps in said
second panel are adjacent the side of its panel core re
adjacent the edge of said ?rst panel.
When the closure 11 is installed as seen in FIG. 1, the 10 mote from said ?rst panel.
3. In combination with a car doorway opening having
vertically~extending side posts, a closure extending across
bottom folded portion 19‘ being secured by nails 21 to
the posts in, the interior straps 14 and 15 cooperate to
substantially minimize the deformation of the closure due
to the pressure of the granular cargo. Through the use
of a minimal number of straps arranged transversely to
each other, the deformation is effectively resisted. Here
tofore, it was believed necessary to use a large number
of straps in order to achieve this resistance. Here, the
presence of only two vertically-extending straps 14 effec
tively reinforces the horizontal straps 15 so that only
two of these are required. The vertical straps 14 act as
columns secured at both ends by virtue of the fact that
the doorway and abutting the inner faces of said posts,
said closure comprising a pair of laminated panels united
together in face-to-face relation, one of said panels being
interiorly equipped with horizontally-extending thin ?at
straps, while the other of said panels is interiorly equipped
with vertically-extending ?at straps, each ‘of said panels
being equipped with a corrugated core having the ?utes
thereof disposed generally perpendicularly to the straps
thereof, the other panel having its upper end portion folded
on itself to form a reinforcing member extending hori
Zontally across said doorway, securing means extending
the straps 14 are effectively anchored at their ends in the
through said member into said posts, and means securing
folded portions 16 and 19. In the event the bottom over
lapping portion 19a is not folded but employed as a ?oor 25 said horizontally-extending straps to said posts.
4. The structure of claim 3 in which said other panel
flap, a conventional pry-board is installed and serves as the
has its lower end portion folded on itself to form a sec
stabilizing means for the lower end of the straps 14.
Thus, we have provided a closure which is, in effect,
self-contained and ready for immediate installation at any
time after it has left the factory. No longer is it necessary
for the mechanics employed for installing doors to rip
apart the door to get at the straps, install the side battens
ond reinforcing member, and securing means extending
through said second member into said posts.
5. In combination with a car doorway opening having
vertically-extending side posts, a closure extending across
the doorway and abutting the inner ‘faces of said posts,
said closure comprising a pair of laminated panels united
together in face-to-face relation, one of said panels being
equipped with a group of horizontally-extending thin ?at
might result in a premature failure. Here, the closure is
straps, While the other of said panels is equipped with a
self-supporting and requires securement only at a mini
group of rvertically-extending thin flat straps, said strap
mum number of points, so that the problem of non-uni
groups thereby being oriented perpendicularly to each
form tension is effectively avoided.
other and disposed internally of said closure, each of said
While, in the foregoing speci?cation, we have set forth
a speci?c structure in considerable detail for the purpose 40 panels being equipped With a corrugated core having the
?utes thereof exposed generally perpendicularly to the
of illustrating an embodiment of the invention, it will be
straps thereof, the other of said panels having its upper
understood that such details of structure and procedure
end portion folded on itself to form a reinforcing mem
may be varied without departing from the spirit of the
ber extending horizontally across said doorway, securing
invention.
means extending through said member into said posts,
We claim:
and means securing said horizontally-extending straps to
1. In a temporary closure, at ?rst laminated, generally
said posts.
rectangular, paperboard panel interiorly equipped with
a plurality of thin ?at, spaced-apart straps all parallel
References Cited in the ?le of this patent
to a pair of edges of said panel, said panel having a cor
50
rugated core interposed between liners, a second lami
UNITED STATES PATENTS
and other reinforcing boards—-all of this while having to
worry about non-uniformly tensioning the door, which
nated paperboard corrugated core-equipped panel also
strap-equipped and secured in face-to-face relation to
said first panel with the straps of the two panels disposed
generally transversely relative to each other, with the 55
straps in each panel extending transversely to the direc
1,895,625
Hummel et al. ________ _.. Jan. 31, 1933
2,739,920
Martin ______________ __ Mar. 27, 1956
2,797,749
2,871,937
Ford et al. ____________ .... July 2, 1957
Fullerton _____________ __ Feb. 3, 1959
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