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Патент USA US3098746

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July 23, 1963
H. J. LITTLE
3,098,736
GLASS BENDING MOLD
Filed May 28, 1959
2 Sheets-Sheet 1
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July 23, 1963
H. J- LITTLE
‘3,098,736
GLASS BENDING MOLD
Filed May 28, 1959
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2 Sheets-Sheet 2
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INVENTOR.
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$398,736
Patented July 23, 1963
1
2
The drawings show a glass bending mold M that is
3,098,736
GLASS BENDING MOLD
Harvey J. Little, Trenton, Mich, assignor to Chrysler
Corporation, Highland Park, Mieln, a corporation of
Delaware
Filed May 28, 1959, Ser. No. 816,580
5 Claims. (Cl. 65-291)
attached to ‘a carriage C to facilitate its passage through
a bending leer not shown. Mold M is of the sectionalized
type and includes a stationary central or intermediate sup
porting section 10 that has end or wing sections 11, 12
pivotally connected to its opposite ends. The ?xed or
stationary center section 10 of this bending mold in
cludes the vertical, transversely spaced, narrow rail-s 1011
that are interconnected by the diagonally extending tie
This invention relates to a glass bending mold and
particularly to a sectionalized bending mold having end 10 rods 1%. The top edges of the spaced rails 1th: provide
portions of the shaping surfaces that support and con
or wing sections pivotally connected to a relatively ?xed
.trol the shape of the glass bent on the mold. The op
center section and interconnected with each other.
posite ends of the rails 10a each are mounted on a leg or
It is a primary object of this invention to provide a
support 13. Legs 13 can be ?xedly or detachably con
glass bending mold with pivotally mounted end or wing
sections wherein there is a novel means for ‘applying 15 nected to the vframework C that provides the carriage or
‘base for the mold M. Struts 14 extend between legs 13
weights to and interconnecting the spaced apart end or
and ‘base C to rigidify the mounting of the legs 13 on
wing sections.
the carriage C.
1It is another object of this invention to provide a novel
Wing or end sections 11, 12 are identical and each con
means for applying weights to the pivotally mounted end
sists of a U-shaped, vertically extending rail 110 or 12a
or wing sections of a sectionalized mold such that the
that has tie rods 11b or 12b respectively extending be
1 weight means will be most effective to cause closing of
tween the opposed leg portions of the U-shaped end
the mold end sections as the glass supported thereon
frames. As the wing sections 11, 12 are identical only
softens.
the wing section 11 will be described in detail. ‘Wing
It is another object of this invention to arrange the
1 weight means so that it will be continuously positioned 25 section 11 has L-shaped lever arms 15, 15 ?xed to each
of its free end portions. The lever arms 15 have bores
where it will not interfere with access to the mold or with
theret-hrough to receive the pivot shaft 16 that extends
movement of the mold through a bending leer or conveyor
equipment.
across and is mounted on the ends of the spaced center
simpli?ed form of actuating means for the pivoted wing
ing of one or more weights 25 on the bars 21. Bolts 35
or any other vform of attachment means can be mounted
section rails 111a. FIGS. 3 and 5 give a clear plan view
It is still another object of this invention to provide a
novel weight supporting means ‘for the pivotally mounted 30 of the arrangement of the levers 15 with respect to the
pivot shafts 16.
end or wing sections of a sectionalized bending mold such
The ‘free ends of the levers 15 are formed with a plu
that equal weight means will 'be applied to each of the
rality of holes 17 to provide for adjustable mounting of
end sections and the weight supporting means will tend
the weight supporting links 18. Links 18 are connected
to synchronize the movement of the pivotally mounted
35 to the lever arms 15 by the pivot pins 19 that can be
end sections.
peened over to prevent unintended disengagement from
‘It is a further object of this invention to- provide a weight
the lever arms 15 and the links 18. The lower ends of
supporting means for the pivotally mounted wing sec
the links 18 are connected by pivot pins 20 to the ?attened
tions of a sectionalized bending mold that includes means
ends of the wing connector bars 21.
for readily adjusting the location of the several weight
Connector bars 21 extend between the lever links 18
means and their points of application to the pivotally
at each end of the mold M ‘along each side thereof. The
mounted wing sections to effect pivoting movement there
connector bars 21 are each provided with a plurality of
of.
spaced apart bores 22 to provide for the adjustable mount
It is also another object of this invention to provide a
sections of a sectionalized mold that will facilitate more
accurate control of the movement of the wing sections
and also require less care in the loading of the mold and
in movement of the mold through a bending leer.
Other objects and advantages of this invention will be
come readily apparent from a reading of the following
description and a reconsideration of the related drawings
wherein:
FIG. 1 is a side elevation of a bending mold embodying
this invention in open position;
FIG. 2 is a side elevation of the mold shown in FIG.
1 in closed position;
7
FIG. 3 is a top plan view of the mold shown in FIG. 2
with the glass sheet removed therefrom;
‘
FIG. 4 is an enlarged fragmentary side elevational view
of one of the pivot connections between the wing sections
and the center section, the view showing those portions
‘ of the mold within the circle 4 of FIG. 2.; and
FIG. 5 is an enlarged ‘fragmentary top plan view of the
pivot connection shown in FIG. 4.
in the bores 22 to attach the weights 25 to the connector
bars 21. It is also proposed to form the bars 21 such
that they will provide integral weight means. Also, the
bars 21 can be formed of interconnected sections so that
they may be adjustable in length to ?t different molds
or different glass patterns.
FIG. 4 shows a means provided on the mold M for
limiting the amount of bending of the wing sections 11,
12. This means comprises a L-shaped bracket 28 that
is welded to the end of the rail 10a adjacent the leg 13.
Brackets 28 each mount a vertically extending set-screw 29
that is ‘aligned beneath the associated lever 15 so that it
will engage the lever 15 and limit the amount of closing
of the wing section associated therewith. Lock nuts 30
are provided to ?x the setting of the screw 29.
From the ‘foregoing description and a consideration of
the drawings it will be noted that when the mold is in
open position (see FIG. 1) the ?at sheet of glass G is
supported at four points along its length by the opened
3,098,736
3
mold. The major portion of the weight of the glass G is
4
portion of the weight of the glass G may also be sup
ported by the tips of the depressed or opened wing sec
said wing sections being arranged to form with said ?xed
section a longitudinally concave, ring-type, shaping sur
face when said wing sections are in their uppermost closed
mold positions, said wing sections when moved to their
depressed, open mold positions providing means wherein
tions as shown at 33. It will be noted that when the
mold M is opened to receive the glass G that there are
the opposite ends of the mold ?xed section support the
glass sheet to be bent on the mold and the wing sections
no weight means projecting above the surface of the glass
G to interfere with the loading of the glass onto the
mold M. In contrast the levers l5 and the connected links
are disposed beneath the end portions of the glass sheet
mounted on the ?xed section, lever means rigidly ?xed
on each of said mold wing sections and extending longi
supported by the ends of the rails 10a of the ?xed or
center section 10 of the mold M as indicated at 32. A
18 provide short, upwardly projecting portions that serve
tudinally of and inwardly towards and beyond the pivot
as locators or positioners to‘facilitate accurate loading of
the mold with sheet glass but do not obstruct movement
of the glass onto the mold.
'As the mold M of FIG. 1 is moved through a bending 15
axis of the associated wing section on said ?xed mold
leer and the glass G begins to soften the Weights 25 act
ing through the links 18 apply equal loadings to the free
ends of the levers 15 and exert forces on the Wings 11,
‘12 that assist in bending the glass G to the concave shape
‘shown in FIG. 2. Not only does the lever and link sys
tem 15, 18 lend itself to application of equal bending
forces to the wing sections 11, 12 but in addition the con
nector bars 21 tend to synchronize the bending action of
'the wing sections to facilitate the production of symmet
rical bent glass.
25
It is thought to be obvious from a consideration of FIG.
4 in particular that the several holes 17 permit variation
in the effective length of the lever arm 15 so that different
bending action can ibe readily obtained with this mold
to adapt it to different glass shapes. Likewise, the adjust
ment set screws 29 also assist in controlling the type of
section, link means pivotally connected to and depending
from the inwardly disposed free end portions of the lever
means on each wing section, and a weighted connector bar
pivotally connected to, ?oatingly supported by and ex
tending between the lower ends of the longitudinally
spaced link means at a level beneath the mold open posi
tion glass supporting level.
2. A ring-type glass ‘bending mold comprising an in
termediate ?xed section and a pair of upwardly curved,
vertically swinging, wing sections pivotally mounted on the
opposite ends of said ?xed section for movement be
tween depressed open mold and elevated closed mold
positions, said wing sections being arranged to form with
said ?xed section a longitudinally concave, ring-type, shap
ing surface when said wing sections are in their upper
most closed mold positions, said wing sections being mov
able to depressed, open mold positions wherein the op
posite ends thereof are substantially aligned with the level
of the mold ?xed section and the wing sections are dis—
bending of the wings when this mold is used.
Not only are the adjustable links 18 of an advantage
posed beneath the end portions of the glass sheet mount
for bending but in "addition the connector bars 21 co
operate withthe pivot links 18 to further improve the ac
tion as well as the ?exibility of this mold. Connector
mold wing sections and pivotally supported on the op
bars 21 not only tend to synchronize the hinging action
of the mold wings ‘but in addition they provide a means
for placing of the bending weights in a preferred non
obstructing position where the Weights will not interfere
with either mold loading or movement of the mold through
a leer on a conventional conveyor system.
Another feature of this invention resides in the use of
heat robber bars or heat absorbers such as the metal bars
40 and 41 shown in broken lines in FIG. 3. These bars
are connected to or mounted on the tie rods 10]), 11b and
12b so that they underlie the glass G. The purpose of
these bars is to absorb a portion of the heat in the area
of the bars and thereby keep the glass overlying the bars
cooler than the glass at other sections of the mold to
thereby retard the bending of the glass at the portions
thereof overlying the heat absorber bars. Obviously other
devices such as heat shields, heat re?ectors and the like
can also be used with the mold G in place of the heat
‘robbers 40, 41 but these devices 40, 41 are a‘ simple effec
tive means for cont-rolling the heat applied to overlying
portions of the glass G.
The use of the pivotally connected support links 13
on the free ends of the levers 15 is a decided improve
ment in molds of this type. Links 1-8 permit the weighted
connector bars 21 to be placed below the shaping surface
of the mold and to thus be out of the way yet not extend
downwardly so far as to interfere with the carriage C or
the conveyor mechanism (not shown) on which the car
ed on the mold, lever means rigidly ?xed on each of said
posite ends of said ?xed section, said lever means 'ex
tending longitudinally of and inwardly towards and beyond
the pivot axis of theassociated wing'section on said ?xed
mold section, link means pivotally connected to and de
pending from the inwardly disposed ‘free ends of the lever
means on each wing section, and a weighted connector bar
pivotally connected to, ?oatingly supported .by and ex
tending between the lower ends of the spaced link means
at a level beneath the mold ?xed section.
3. A ring-type glass bending‘mold comprising a center
?xed section formed from a pair of transversely spaced,
vertically extending, interconnected, narrow rails, and a
pair of U-shaped, upwardly curved, vertically swinging,
wing sections having their free ends pivotally mounted on
'the ends of said ?xed section ‘for movement between de
pressed open mold and elevated ‘closed mold positions,
said wing sections being arranged to form with said'?xed
section rails ‘a longitudinally concave, ring-type, shaping
surface when said wing sections are in their uppermost
closed mold positions, said wing sections being movable
to ‘depressed, open mold positions wherein the opposite
ends of the mold ?xed section support the glass sheet to
be bent on the mold and the wing sections are disposed
beneath the end portions of the supported glass sheet with
the tips of the wing sections engagea-ble with the under
side of the glass sheet at the ends thereof, lever means
rigidly ?xed to each of said mold wing sections and pivot
ally supported on said ?xed sections, said lever means
extending longitudinally of and inwardly beyond the pivot
axis of the associated wing section on said ?xed mold sec
riage C would be transported. The free pivot pins 19, 65 tion, link means pivotally connected to and depending
20 on opposite ends of the lever links 18 permit auto
matic centering of the weighted connector bars 21 be
tween the wing lever arms 15 regardless of whether the
wing sections are in open or closed positions.
I claim:
1. A ring-type glass bending mold comprising an inter
mediate ?xed section and a pair of upwardly curved, ver
tivally swinging, wing sections pivotally mounted on the
opposite ends of said ?xed section for movement between
depressed open mold and elevated closed mold positions,
from the inwardly disposed ‘free ends of the lever means
on each wing section, and a weighted connector pivotally
connected to, ?oatingly supported ‘by and extending be
tween the lower ends of the link means on the wing sec
tions at opposite ends of the mold with the Weighted con
nector positioned at a level beneath the mold open posi
tion glass supporting level.
4. In a glass bending mold as set forth in claim 3 where
in the free ends of the lever means ‘are arranged for ad
justable connection of the link means therealong.
3,098,736
6
5. Ina glass bending mold as set forth in claim 3 Where
in said connector bar comprises ‘a bar with means there
on for adjustably positioning weight means therealong.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,167,714
1,750,998
2,500,278
2,656,732
P-fau ________________ __
Ferngren ____________ __
Dunipace ____________ __
Clough _____________ __
Jan.
Mar.
Mar.
Oct.
11,
18,
14,
27,
2,695,476
2,704,937
2,861,396
2,893,170
2,961,801
Iendrisak ____________ .__ Nov. 30, 1954
Stokes ______________ .. Mar. 29, 1955
Richardson __________ __ Nov. 25, 1958
Carson et al. _________ __ July 7, 1959
Donovan et a1. _______ __ Nov. 29, 1960
FOREIGN PATENTS
1916
1930
1950
10
1953
710,393
1,089,973
800,987
213,756
Great Britain _________ __ June 9, 1954
France ______________ __ Oct. 13, 1954
Great Britain ________ __ Sept. 3, 1958
Australia ____________ __ Mar. 20, 1958
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