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Патент USA US3055493

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Sept. 25, 1962
H. E; WHITTEMORE ET AL
3,055,433
HOPPER FEED CONTROL nEvIcE
Filed Aug. 21, 1958
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3,055,483
Patented Sept. 25, 1962
2
3,055,483
HOPPER FEED CONTROL DEVICE
Harold E. Whittemore, East Hemp?eld Township, Lan
caster County, and Robert W. Morrison, Washington
Boro, Pa., assignors to Armstrong Cork Company, Lan
caster, Pa., a corporation of Pennsylvania
opening but being slightly offset therefrom so that the ma
terial strikes the sloping side 6 of the hopper 5. The
header 10 is secured to and carried by a movable slide 11
which is capable of oscillatory motion along the top of
the hopper 5 on the rollers 12.
When the previously mixed Igranular and chip material
Filed Aug. 21, 1958, Ser. No. 756,386
3 Claims. (Cl. 198-56)
is fed through the tubes 9 in such manner as to evenly dis
tribute the material from one end of the hopper 5 to the
This invention relates to a feeding device and more par 10 other, care must be exercised to prevent the building of
mounds of the material beneath the individual tubes.
ticularly to a device for feeding a quantity of color par
When such mounds occur, the larger ?at chips slide down
ticles of varying size onto a moving carrier in a manner
the outside of the mounds, causing segregation of the chips
to insure a layer of a uniform dispersion of the varying
and the relatively ?ne granules of color composition in
sized particles on the carrier.
the hopper. If the larger ?at chips are permitted to accu
In the production of sheet floor and wall coverings such
mulate in the low areas between adjacent mounds, the re
as linoleum and plastic material, it is common practice to
sulting pro-ducts will have lines of the larger chips between
lines of the ?ne granules. This is objectionable when it is
place a mass of granular material on a backing or suitable
carrier prior to consolidation. In order to produce certain
desired design e?ects, it has been found necessary to sup
desired to produce a sheet material having a uniform over~
all design effect. In order to overcome this, the header
carrying the feeder tubes is oscillated periodically in a di
rection parallel to the longitudinal slot opening so as to
prevent the formation of mounds, and on the contrary,
ply chips of color composition of appreciable size, along
with smaller particles in order to produce a mottled de
sign in which the design elements are not all the same
size. When such mass of color particles is consolidated
into the ?nal product, the ?ne granules serve as the back
evenly distribute the material in a manner to maintain the
ground color while the larger chips effectuate the desired 25 uniform dispersion of larger chips and smaller granules
established by the premixing prior to feeding down the
design. It is di?icult to feed color compositions of this
feeder tubes 9. When the hopper is ?lled to the header
type inasmuch as there is a tendency for segregation to
10 and additional granulated material is fed down the
occur in the hopper between the small granules and the
tubes, it builds up in the header 10 and is con?ned therein,
an even distribution of particles of varying size, but in 30 preventing segregation. Periodic oscillatory motion to the
header 10 by means of the plate 11 moving on the rollers
stead has zones in which there is a lack of the design
12 in a line parallel to the slot 8 causes the header 10 to
forming chips while other zones have a preponderance of
level
the top of the reservoir of material in the hopper 5
chips and no background color composition. Several de
and prevents segregation due to the fact that this oscillat
vices have been utilized to avoid this defect. These de
vices include hopper vibrators, agitation in the hopper, 35 ing movement distributes the newly supplied granular ma
larger chip particles, and the resulting design does not have
terial evenly over the top of the reservoir and prevents the
formation of mounds under the individual tubes 9.
etc, but these all had a tendency toward ‘further segrega
tion rather than limiting segregation.
In order to- overcome the disadvantages above recited,
the invention here under consideration has been developed
The oscillatory motion is imparted to the slide 11 by
means of the motor 13 and the crank arm .14 which is
in which the color particles are mixed uniformly and are 4-0 pivotally attached to the slide 11 at point 15. Rotation
of the crank arm 14 causes the slide to move in a direction
fed into a hopper uniformly across the entire width of the
parallel to the longitudinal center-line of the slot at the
hopper from a plurality of individual feeding means, each
bottom of the hopper.
supplied with a uniform mixture of color particles, with
As the conveyor 4 moves about the driven rolls 16 and
small granules and the larger chip particles, after which
they are leveled off in order to prevent the building of 45 18, it picks up the material which falls through the slot
mounds under the individual feeders, which would result
in segregation of the larger color particles from the smaller
granules.
An object of this invention is to provide a feeding de
vice ‘for color particles of various sizes in which the color 50
particles are maintained at a relatively constant level in a
feed hopper to prevent segregation.
In order that the invention may be more readily under
stood, it will be described in ‘connection with the attached
drawing in which
FIGURE 1 is a schematic view of the device;
FIGURE 2 is a top plan view of the device; and
FIGURE 3 is a cross sectional view of the device shown
in FIGURE 1.
Referring to FIGURE 1, there is shown a conventional
backing 2 ‘for sheet floor and wall coverings. This back
ing may be felt or burlap and is supplied to the device
Sin the hopper. The front wall 7 of the hopper 5 is posi
tioned above the conveyor 14 a su?icient distance to permit
a layer of color particles of the required thickness to
produce a ?nal sheet of the desired gauge to pass along
with the conveyor. These granules are lightly compacted
on the conveyor by means of the metering roll 18 posi
tioned immediately in front of the hopper. This layer
of material which has an even distribution of ?ne granules
and coarse chips then passes along the conveyor 4 and
55 is deposited from the conveyor 4 onto the backing 2 as
the backing moves through under the conveyor. Final
consolidation of the color particles on the backing may be
accomplished by any of the conventional equipment
commonly used ‘for that purpose, such ‘as a calender or
a ?at bed press.
In a typical example of operating this device, color
granules ranging in size from one-sixteenth of an inch
to one-eighth of an inch diameter and color chips approxi
around the idler roll 3 and passes beneath a wide belt con
mately .015" thick and having a ?at surface dimension
veyor 4 which is slightly wider than the backing 2. Im
mediately above the conveyor 4 is a hopper 5 provided 65 ranging from one-eighth of an inch to ?ve-eighths of an
inch are premixed in the desired proportions and fed
with converging sides 6 and 7, the bottom edges of which
through the tubes 9 into the hopper 5. As the hopper
de?ne a slot opening 8 (FIGURE 3) positioned directly
5 ?lls, the header 10 is moved horizontally across the
above the conveyor 4 and extending substantially the en
top of the hopper periodically a distance at least twice
tire width of the conveyor 4. The premixed granular and
chip material is supplied to the hopper 5 through the tubes 70 the magnitude of the distance between the centers of the
individual feeder tubes ‘9. This movement of the header
9 which terminate at their lower extremity in a header 10
10 carries with it the color particles disposed therein and
extending along the top of the hopper parallel to said slot
levels the material in the hopper, insuring uniform distri
3,055,483
bution of various size color particles in the hopper. In
asmuch as this segregation in the hopper is eliminated,
4
to said hopper, said tubes terminating in a leveling device
positioned in the hopper, a horizontally movable plate
on which said leveling device is mounted, and means for
the material fed from the bottom of the hopper is uni
imparting horizontal oscillatory motion to said plate to
formly mixed ‘and a uniform layer of color granules
move the leveling device in a direction parallel to the
01
results.
longitudinal slot opening.
In the preferred embodiment here under consideration,
2. In a device for ‘forming a layer of loose color particles
the feeder tubes 9 are located on four~inch centers and
in which color particles of varying sizes are uniformly
the slide 11 on which the tubes are mounted traverses
dispersed upon a carrier to cover substantially the entire
a distance of eight inches so as to insure a movement of
Width
of the carrier, the elements comprising a hopper
10
the header to distribute the color particles over the entire
for receiving a quantity of color particles of varying size,
area between tube centers.
said hopper having converging walls on two sides thereof
It has been found that it is not necessary to operate the
de?ning a slot opening for discharge of the color particles
slide constantly, but the desired etfect can be obtained by
from the hopper onto said carrier, said slot being substan
intermittent movement effected by a conventional timing
tially as long as the width of the carrier on which the
device on the switch which controls the energizing current
layer of color particles is ‘discharged, a plurality of tubes
to the motor 13. The timing device is adjustable, and its
for delivering the color particles from a source of supply
setting is determined by the range of particle sizes being
to the hopper, said tubes being arranged in a line parallel
fed. For example, the smaller the range between the
to the longitudinal slot opening in the bottom of the
small dimension of the granules and the large dimension
hopper, leveling means positioned at the bottom of said
of chips, the greater the interval between oscillations of
tubes where the color particles enter the hopper, and
the slide 11 and the larger the range between the small
means for imparting horizontal oscillatory motion to said
dimension of the granules and the large dimension of the
tubes and said leveling device to move them in a direction
chips, the smaller the interval between the oscillations.
parallel
to the longitudinal slot opening.
The above is based on an equal proportion of chips and
3. In a device for forming a layer of loose color particles
granules, however, if the ratio is changed so there is a
in which color particles of varying sizes are uniformly
preponderance of chips, it may be necessary to decrease
dispersed upon a carrier to cover substantially the entire
the interval for a given range of granule and chip size,
width of the carrier, the elements comprising a hopper
and also if there is a preponderance of the granules, it
for receiving ‘a plurality of color particles of varying size,
may be possible to decrease the number of oscillations
said hopper having converging walls on two sides thereof
for a given range of ‘granule and chip size. The timing 30 de?ning a slot opening for discharge of the color particles
arrangement for a given mix can readily be determined
from the hopper onto said carrier, said slot being sub
by those skilled in the art in practicing this invention. In
stantially as long as the width of the carrier on which the
handling a mixture in which the smallest granules are of
layer of color particles is discharged, a plurality of tubes
the order of one-sixteenth of an inch and the largest chips
for delivering color particles from a source of supply to
are ?ve-eighths of an inch, and the granules and chips are
said hopper, said tubes terminating in a leveling device
disposed in a 50-50 ratio, satisfactory distribution in the
positioned in the hopper, a horizontally movable plate
hopper has been effected by oscillating the slide 16 times
per minute.
It will be obvious from the above that we have de
veloped a device which will ‘distribute a uniform layer of
color composition on a backing prior to consolidation
into a composite sheet for floor and wall covering use.
We claim:
1. In a device for forming a layer of loose color par 45
ticles in which color particles of varying sizes are uni
formly dispersed upon a carn'er'to cover substantially
the entire width of the carrier, the elements comprising a
hopper for receiving a quantity of color particles of vary
ing size, said hopper having converging walls on two sides 50
thereof de?ning a slot opening for discharge of the color
particles from the hopper onto said carrier, said slot being
substantially as long as the width of the carrier on which
the layer of color particles is discharged, a plurality of
tubes for delivering color particles from a source of supply
on which said leveling device is mounted, means for im
parting horizontal oscillatory motion to said plate to move
the leveling device in a direction parallel to the longi
tudinal slot opening a distance equal to at least twice the
spacing of the tube centers.
References Cited in the ?le of this patent
UNITED STATES PATENTS
269,850
486,851
587,509
1,104,491
Hadden _______________ __ Jan. 2,
Campbell ____________ __ Nov. 29,
Roberts ______________ __ Aug. 3,
Greenwalt ____________ __ July 21,
1883
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Miller _______________ __ Apr. 24,
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Wiggins _______________ __ Oct. 5,
1923
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2,690,827
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