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Патент USA US3037277

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June 5» 1962
G. R. KIMBALL ETAL
METHOD OF MAKING SHELF STRUCTURES
Filed Feb. 20, 1959
3,037,267
United States atent @ffice
3,037,267
Patented June 5, 1962
2
1
end of the refrigerator shelf structure and »the staking of a
3,037,267
cross-wire to an end bar of the structure.
METHQD 0F MAKING SHELF STRUCTURES
George R. Kimball, and Nicholas L. Etten, Cedar Falls,
Iowa, assignors to Chamberlain Corporation, Waterloo,
Iowa, a corporation of Iowa
ln the embodiment of the invention illustrated in the
drawing, we have shown in FIGURE l a refrigerator shelf
structure including longitudinally extending parallel
spaced side bars 10, 1t?, an intermediate or center bar 11,
Filed Feb. 20, 1959, Ser. No. 794,624
2 Claims. (Cl. 29-160)
This invention relates to improvements in shelf struc
tures and more particularly relates to an improved method
of making shelf structures particularly adapted for re
frigerators and the like.
Heretofore, refrigerator shelf structures have consisted
in spaced longitudinal bars and round cross-wires con
necting the bars together by riveting or by threading the
ends of the wires to the longitudinal bars and by heading
the ends of the wires to the end bars and by crimping
and round rods or wires 12 connecting the bars 10, 10 and
11 together in accordance with the principles of the
invention.
Referring now to FIGURES 2 and 3, the longitudinally
extending side bars 10, 10 are each formed from a ilat
plate or strip of metal, such as steel, aluminum or any
other suitable metal, and are slotted While in strip form
by a punching lor like operation, providing a plurality
of parallel spaced slots 13 in the flat metal strip or plate,
having rounded ends 15 conforming to substantially one
half of the circumference of the rounded cross-wires 12.
The strip when slotted is then bent into a channel-like
the wires to the intermediate bar. The riveted ends of
form having a web 16 and parallel spaced legs or flanges
«the wires have then been concealed by an ornamental
bounding frame extending about the shelf structure or 20 17 and 19 extending therefrom, with the rounded end
by ornamental frame structures enclosing the ends and
portions 1S of the slots 13 in said legs and forming gen
sides of the frame.
With such shelf structures, the riveting or threading
operations are objectionable, due to the difficulty in rivet
erally semi-circular recesses to receive the cross-wires 'or
rods 12.
cross-wires to be recessed therein, and in which the cross
wires are secured to the end and intermediate bars by
may be bent to any desired configuration to «form a
gripping surface for the hands or lingers and to enhance
35 the decorative fea-tures of the shelf.
During the operation of forming or bending the side
ing and threading the wires to the end bars, resulting in 25 bar lil, the leg 19 is bent outwardly intermediate the ends
thereof and is then bent backwardly parallel to the leg
an expensive operation and making it necessary to con
19, to provide a shielding portion 20 extending parallel
ceal the riveted or threaded ends of the wires by an orna
to the leg portion 19, and spaced outwardly therefrom.
mental frame of one form or another.
The end portion of the shielding portion 26 is then bent
A still further object of the invention is to provide ‘an
improved method of making refrigerator shelves in which 30 outwardly as indicated by reference character 21 to pro
vide a lip extending for the length of the side bar, which
the end and intermediate bars of the sheld are of a
may readily be gripped by the lingers. The lip portion |21
channel-like construction, slotted to accommodate the
staking the wires laterally into engagement therewith.
simpler method of making refrigerator shelves and the
like, in which all riveting operations and concealing frame
The center or intermediate bar 11 may be formed from
a fiat metal strip or plate like the end bars 10, and is
shown in FIGURE 4 as having a web 23 having parallel
structures are rendered unnecessary.
spaced legs or flanges 24 having slots 25 formed in the
A still further object of the invention is to provide a
A still further object of the invention resides in the pro 40 web of the bar, and having generally semi-circular end
portions 26 forming downward continuations of the slots
vision of method of making a `fabricated shelf structure
2S and receiving substantially half of the wires or rods 12.
suitable for use in refrigerators and the like, wherein three
In assemblying the shelf structure after the slotting and
parallel spaced longitudinally extending bars, channel-like
forming of the end bars 10 and the center bar 11, the
in cross-section, are slotted to receive round wires and
wherein the round wires are recessed within the slotted 45 .rods o1- wires 12 may first be located on a platen or man
drel 27 in parallel relation with respect to each other.
portions of the channel-like longitudinal bars and secured
The end bars or rails 10, and the intermediate bar 11 may
thereto by simple staking operations.
then be inverted and the slots 13 and 2S located on the
These and other objects of the invention will appear
wires 12 and pressed thereon, with the inner sides of the
from time to time as the following specification proceeds
and with reference to the accompanying drawing wherein: 50 shielding portions 20 in abutting engagement with the
ends of the wires. A die `or a series of dies (not shown)
FIGURE l is a fragmentary plan view of a refrigerator
may then be moved downwardly into engagement with
shelf structure constructed in accordance with the
the wires 12, to stake the wires outwardly between the
invention;
flanges of the side rails 10 and center rail 11, and form
FIGURE 2 is a transverse sectional View taken through
a metal strip forming one `of the end bars of 4the shelf struc 55 laterally projecting staked portions 29 on the cross-wires,
engaging the underside of the webs of the channels of the
ture, prior to forming of the bar in a channel-like form,
side bars 11, 11 and the intermediate bar 10.
and illustrating a wire receiving slot formed therein prior
These staking operations complete the assembly >of the
'to forming of the bar to its channel-like form;
shelf structure, providing a simple `and eílicient shelf
FIGURE 3 is a fragmentary plan View of a metal strip
forming the center bar of the shelf structure, and illustrat 60 structure sufficiently stiff for use in household refrigerators
and produced with fewer parts and in a far simpler man
ing the configuration of the slots formed therein;
ner than refrigerator shelves have heretofore been pro
FIG. 4 is a plan View of a formed intermediate bar of
duced.
the shelf structure;
It will be understood that modifications and variations
FIGURE 5 is a fragmentary generally diagrammatic
of the invention may be effected without departing from
view illustrating the steps of assemblying the shelf 65 the spirit and scope of the novel concepts thereof.
structure;
We claim as our invention:
FIGURE 6 is a fragmentary sectional View taken sub
l. The method of making a shelf structure particularly
stantially along line VI-VI of FIGURE l;
.
FIGURE 7 is a fragmentary sectional view taken sub
stantially along line VII--Vll of FIGURE l; and
FIGURE 8 is a fragmentary end view, illustrating one
adapted for refrigerators and the like, comprising the
70 steps of forming a plurality of parallel spaced slots in a
plurality of flat metal strips, extending transversely of the
strip-s and having end portions conforming to the cross
3,037,267
3
section of the cross-Wires of the shelf structure, bending
the strips to channel-like forms having central webs and
parallel spaced flanges extending from opposite sides
thereof, with the end portions of said slots extending equal
to the spacing of the slots in the strips, positioning the
formed strips with the slots in the flanges thereof opening
toward the cross-wires, registering the slots in a first strip
with a plurality of parallel cross-wires, and then aligning
second and third channel-like bars with the ñrst bar and
distances along said flanges, arranging a plurality of cross
wires in spaced relation with respect to each other cor
responding to the spacing of said slots, positioning the
formed strips with the slots in the flanges thereof opening
and then staking the cross-wires to the undersides of the
webs of the bars.
towards the cross-wires, registering the cross-Wires in `the
slotted portions in the webs and ñanges, and then staking
References Cited in the tile of this patent
registering the slots therein with said parallel cross-wires,
the cross-wires into engagement with `the underside of
the web.
2. The method of making -a shelf structure particu
larly adapted for refrigerators and the like comprising
the steps of slotting a plurality of metal strips transversely
of the strips in a plurality of places therealong and form~
ing the slots with opposite rounded end portions, bending
the strips to channel-like forms having central webs and
parallel ñanges extending therefrom, With the rounded
end portions of the slots extending along the flanges for
equal distances, arranging a plurality of cross-wires in
spaced relation with respect to each other corresponding
UNITED STATES PATENTS
1,004,996
1,014,684
1,620,846
1,636,592
1,867,701
1,973,113
1,997,793
2,319,468
2,350,875
2,634,867
Collis _______________ __ Oct. 3,
Weygand _____________ __ Jan. 16,
Wells _______________ __ Mar. 15,
Cushwa ______________ __ July 19,
Keown ______________ _.. July 19,
Schulz _______________ __ Sept. 1l,
Hull ________________ __ Apr. 16,
Nagin _______________ __ May 18,
Carney ______________ __ June 6,
Shields ______________ __ Apr. 14,
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