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Патент USA US3089263

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May 14, 1963
R. w. EVANS
3,089,253
mums FOR AERATING GRANULAR AND PULVERULENT MATERIALS
Filed NOV- 24, 1958
2 Sheets-Sheet 1
INVENTOR.
ROBLEY W. EVANS
WWMyM
ATTORNEYS
H
May 14, 1963
_
R. w. EVANS
3,089,253
MEANS FOR AERATING GRANULAR AND PULVERULENT MATERIALS
Filed Nov. 24, 1958
2 Sheets-Sheet 2
INVENTOR.
ROBLEY W. EVANS
~2c
_ J17; 9.17
BY
mwvwy
ATTORNEYS
United States Patent 0
Patented May 14, 1963
resilient supporting members 2 are secured in longitudi
nally spaced-apart relation. The members 2 may be any
of several types. They may consist of cantilever leaf
springs comprising a plurality of glass ?laments in a
matrix of synthetic resin (such as are disclosed in United
3,089,253
MEANS FOR AERATING GRANULAR AND
PULVERULENT MATERIALS
Robley W. Evans, New Albany, IntL, assignor, by mesne
assignments, to Chain Belt Company, Milwaukee, WlS-,
States Patent No. 2,829,881 issued to John M. Morris on
April 8, 1958). In any case, the members 2 direction
a corporation of Wisconsin
Filed Nov. 24, 1958, Ser. No. 776,060
16 Claims. (Cl. 34-164)
ally control the movement of a conveyor assembly 5 in an
inclined path of vibration indicated by the double-tipped
arrow 4, the conveyor assembly 5 being supported upon
It often is desirable to aerate granular or pulverulent
materials for the purpose of heating or cooling them to
promote or retard polymerization or other chemical reac
and fastened to the tops of the resilient members 2.
The conveyor assembly 5 comprises a plenum chamber
6 which may be trough-shaped, as shown in FIG. II, with
tions, or to drive off absorbed gases or moisture or other
storage or use.
1C6
2
1
wise condition the materials for further processing or for
3,089,253
pn
?anges 7 extending outwardly from its upper rims. Re
15 movably secured to the ?anges 7 are angleform top mem
Granular and pulverulent materials and mixtures there
of heretofore have been successfully aerated by passing
them along conveyors having vibratory channels the bot
bers 8, the vertical portions of which dip into a conveyor
channel 9. The lower edges of the vertical portions of
the angleform top members 8 lie closely above the bottom
of the conveyor channel 9, leaving narrow slits through
toms of which were permeable to air or gas supplied from
plenum chambers carried below the bottoms of such chan 20 which sheets of air or other gas are blown over the bottom
of the conveyor channel.
nels (see for example United States Patent No. 2,795,318
The path taken by gas passing from the plenum cham
issued June 11, 1957, to John M. Morris). In the vibra
ber
6 into the channel 9 is shown by curved arrows in
tory conveyor art the bottoms of vibratory channels are
FIG. II. Even in cases in which the ?ow of gas is in
often called “decks.”
A vibratory conveyor functions by tossing particles of 25 sui?cient to “?uidize” the material in the channel, each
vibration of the conveyor assembly 5 tosses the mass of
material upwardly and forwardly with each vibratory
material in the channel so that gas can ?ow from the slits
cycle, and air injected in minute jets through a permeable
10 over the bottom of the chamber 9, under and up
deck of such a conveyor mingles readily with the particles
through the material that is being conveyed along the
that are being agitated by vibration. The openings in
channel.
30
such a deck must be small enough to prevent loss of parti
Whether the material is aerated merely to increase the
cles of material therethrough. Thorough cleaning of a
speed at which it is conveyed, to dry it, to cool it, or to
permeable deck is dif?cult, and thorough cleaning is fre
quently necessary when the apparatus is used to process
successive batches of materials which differ in color or in
other characteristics.
It is an object of this invention to provide means for
aerating pulverulent or granular material as it is being
conveyed along a vibratory conveyor having a channel
heat it by means of hot air, or whether the ?nes content
of the material is ?uidized, depends upon: the nature of
35 the material being processed, the inclination or declina
tion of the conveying channel, the air pressure in the
plenum chamber and the consequent velocity of air flow,
the frequency and amplitude of vibration, the widths of
the slits ‘10, and other conditions which can be modi?ed
or adjusted according to the results desired.
More speci?cally it is an object of this invention to
In order that the Widths of the slits 10 may not change
provide means for blowing sheets of gas transversely
during the vibration cycle, the entire assembly 5 is vi—
across the bottom, i.e. the deck of a vibratory conveyor
brated as a unit. The air or other gas used (for treating
channel, so that as material being conveyed is tossed away
the pulverulent o-r granular material may be supplied
from such deck by vibration, the gas rushes into the space
beneath the material, from where it is forced through the 45 from a heater or cooler or other treating unit 11, con
nected to the plenum chamber ‘6 by a ?exible tube 12.
material as the material and deck move toward each other
FIG. III shows a form of the invention as incorporated
to close the space during a later phase of the cycle.
in
a spiral conveyor (of the general type illustrated in
Other objects and numerous advantages of the invention
Patent No. 2,630,210 issued to Robert M. Carrier, IL,
will become apparent upon perusal of the following speci
?cation, illustrated by the accompanying drawings, of 50 on March 3, 1953). In the form shown in FIG. III a
central tube 6a constitutes a plenum chamber from which
which:
air is discharged into a spiral top member 8a which dips
FIG. I is a side elevational view of a preferred form of
into a spiral conveyor channel 9a, leaving slits 10a from
conveying and conditioning apparatus embodying this in
which the air ?ows under ‘and, if desired, through the
vention;
FIG. II is a sectional view taken substantially as indi 55 tossing bed of pulverulent and/or granular material.
The direction of air ?o-w in the form of device illustrated
cated by the line II——II of FIG. I;
in KFIG. III is shown by arrows.
FIG. III is a fragmentary elevational view with parts
In the form of device shown in FIGS. I and II the degree
broken away and parts in section, showing an embodi
of
aeration is not appreciably diminished at the center
ment of this invention in a spiral conveyor;
FIG. IV is a fragmentary sectional view showing this 60 of the channel 9, depending upon the conditions effecting
aeration and the amount of aeration desired as discussed
invention embodied in a wide conveying and conditioning
above. By employing the modi?cation shown in FIG.
device;
IV,
however, the Width of the conveyor can be doubled
FIG. V is a fragmentary sectional view showing a mod
with an imperforate bottom or deck.
or tripled or increased to any desired extent. ‘In the
i?ed form of conveying and conditioning device embody
65 form of device shown in FIG. IV the plenum chamber
ing this invention; and
6b is of double width, the number of conveyor channels
FIG. VI is a fragmentary sectional view showing an
911 is doubled and an additional set of top members 8b
other modi?cation.
is mounted to dip into the adjacent inner sides of the con
This description and the accompanying drawings are
veyor channels 9b. The form shown in FIG. IV is equiv
intended to describe and illustrate preferred forms of the
70 alent to a dual installation of the form shown in FIGS.
I and II.
FIG. V shows a vform of device in which the plenum
in FIGS. I and II comprises a base 1 to which transverse
invention but not to impose limitations on its scope.
The apparatus embodying the instant invention shown
3,089,253
3
chambers 60 extending along the sides of the channel 9c
are substituted in place of the plenum chamber 6 which is
shown in FIG. 11 as extending along the sides and bottom
of the channel 9.
The practicable width of the form shown in FIGS. I
and II can be increased somewhat by employing top
members 8d having inwardly projecting ?anges 13d along
their lower edges to move the slits lild inwardly as shown
in FIG. V'I.
4
below the lower edges of said members, said members
having top portions extending outwardly, means forming
a plenum chamber extending below the ?oor of said chan
nel and upwardly at each side of said channel, each said
plenum chamber means having ?anges extending there
along, and means for removably securing said ?anges of
said plenum chamber means to said top portions.
4. In apparatus for treating masses of discrete particles
of materials having ?uidizable components, in combina
It is only necessary to remove the top members, which 10 tion, means for imparting to such materials a series of up
are held in place by bolts, to make the top members and
ward and forward tosses, said means including a con
the channel accessible for cleaning, for example by means
veyor channel with a substantially flat imperforate ?oor
of an air hose or a vacuum cleaner.
,
and mechanism for vibrating said channel at an angle to
Whereas in vibratory conveyors having gas-permeable
said ?oor, members extending downwardly adjacent the
decks it has been necessary to make such decks of ?ne 15 sides thereof into juxtaposition to said ?oor and having
screens, using thin wire, the conveyor channel in the de
top portions extending outwardly, there being slits extend
vice of this invention can be as heavy and sturdy as is
required to avoid deterioration in use and damage in
cleaning, whether the material being processed is coarse
or ?ne, soft or abrasive.
The invention described above includes modi?cations
within the spirit and scope of the invention as taught and
disclosed.
ing longitudinally of said channel below the lower edges
of said members, said members having top portions ex
tending outwardly, means forming a plenum chamber
extending upwardly at each side of said channel, each
said plenum chamber means having a ?ange extending
therealong, and means for removably securing said ?anges
to said top portions.
5. In conveying apparatus; a conveyor channel having
I claim:
1. In apparatus for treating masses of discrete par 25
an imperforate floor and upstanding sides; means for
ticles of materials having ?uidizable components, in corn
vibrating
said ‘channel such that materials carried therein
bination, means for imparting to such materials a series
have imparted thereto a series of upward and forward
of upward and ‘forward tosses, said means including a
tosses; means de?ning a plenum chamber extending along
conveyor channel with a substantially ?at imperforate
?oor and mechanism for vibrating said channel at an 30 at least one side of ‘the channel with an exit slit opening
angle to said ?oor, members extending downwardly ad
jacent the sides of said channel into juxtaposition to said
?oor, there being slits'extending longitudinally of said
horizontally into the conveying channel adjacent the ?oor
means including a conveyor channel with a substantially
ber to the channel; and means for injecting an aeriform
thereof; and means for injecting an aeriform ?uid through
said slit beneath said material as it is tossed upwardly.
6. In conveying apparatus; a conveyor channel having
channel below the lower edges of said members, said
members having top portions extending outwardly, means 35 an imperforate ?oor and upstanding sides; means for vi
brating said channel such that materials carried therein
de?ning a plenum chamber extending below the ?oor of
have
imparted thereto a series of upward and forward
said channel and upwardly at each side of said channel,
tosses; means de?ning a plenum chamber extending along
each said plenum chamber means having ?anges extend
‘at least one side of the channel; said plenum chamber
ing therealong, means for removably securing said ?anges
means having an exit slit between a ‘wall of the chamber
of said plenum chamber means to said top portions,
and a floor of the channel; and means for injecting an
means ‘for conditioning aeriform ?uid by changing its
aeriform ?uid through said slit into the space beneath
pressure and temperature, and a conduit for conducting
material in said channel.
such aeriform ?uid into such plenum chamber, whereby
7. In conveying apparatus; a conveyor channel having
such tossing of materials may create spaces therebene-ath
an imperforate ?oor and upstanding sides; means for
and such aeriform ?uid so conditioned may be injected
vibrating said channel such that materials carried therein
from said slits over the ?oor of said channel and thence
have imparted thereto a series of upward and forward
through such material at proper velocity for ?uidizing
tosses; means forming a plenum chamber extending along
?uidizable components.
.
at least one side of said channel; a slit formed in at least
2. ‘In apparatus for treating masses of discrete particles
one of said upstanding sides adjacent the floor of the
of materials, in combination, means for imparting to such
channel providing communication from the plenum cham
materials a rapid series of upward and forward tosses, said
?uid through said slit in sufficient quantity to ?ll the space
between said vibrated material and said ?oor when said
channel at an angle to said ?oor, means forming a plenum
chamber extending upwardly at each side of said channel 55 material is tossed free of said ?oor.
‘8. In conveying apparatus for handling masses of dis
and including a ?ange extending therealong, a pair of
crete particles of materials having ?uidizable components;
angle members removably secured to said ?anges, said
a conveyor channel having an imperforate ?oor and up
angle members cooperating with said channel to form
standing sides; means for vibrating said channel such that
longitudinal slits adjacent the ?oor of said channel, means
for conditioning aeriform ?uid by changing its pressure 60 materials carried therein have imparted thereto a series of
upward ‘and forward tosses; means forming a plenum
and temperature, and a conduit for conducting such aeri
chamber extending ‘along at least one side of the channel;
form ?uid into such plenum chamber, whereby such
a slit formed in at least one of said upstanding sides near
tossing of material may create spaces therebeneath and
the floor and communicating with the plenum chamber
such aeriform ?uid so conditioned may be injected from
?at imperforate ?oor and mechanism for vibrating said
said slits over the floor of said channel and thence through 65 and means for injecting an aeriform ?uid through said
such material.
.
3. In apparatus for treating masses of discrete particles
of materials having ?uidizable components, in combina
tion, means for imparting to such materials a rapid series
of upward and forward tosses, said means including a con
veyor channel with a substantially ?at imperforate floor
and mechanism for vibrating said channel at an angle to
the plane of said ?oor, members extending downwardly
adjacent the sides thereof into juxtaposition to said ?oor,
there being slits extending longitudinally of said channel
slit whereby said ?uid ?lls the space between said vibrated
material and said ?oor, when said material is tossed free
of said ?oor, and continues upward through said material
at a velocity suhicient to ?uidize said ?uidizable compo
nents.
9. In conveying apparatus; a conveyor channel having
an imperforate ?oor and upstanding sides; means for vi
brating said channel such that materials carried therein
have imparted thereto ‘a series of upward and forward
tosses; means forming a plenum chamber extending along
3,089,253
5
allel to said ?oor through said slit as the material is
tossed free of the ?oor of the channel.
12. An apparatus according to claim 11 in which suffi
at least one side of the channel; a slit formed in at least
one of said upstanding sides and communicating with the
plenum chamber; and means for injecting an aeriform
fluid through said slit beneath said material as it is tossed
upwardly including means for conditioning at least one
characteristic of said ?uid from the family of character
istics of an aeriform ?uid including pressure and tempera
cient aeriform ?uid is supplied through the slit to ?uidize
at least part of the material in the channel.
13. In an apparatus according to claim 11, means con
nected to the plenum chamber for conditioning the aeri
form ?uid supplied to the plenum chamber.
ture.
14. An apparatus according to claim 11 in which the
‘10. In conveying apparatus; a conveyor channel having
channel
is vibrated along an inclined path to convey ma
10
an imperforate floor and upstanding sides; means for
terial along the channel.
vibrating said channel such that materials carried therein
~15. An apparatus according to claim 11 in which the
have imparted thereto a series of upward and forward
means
de?ning the plenum chamber is readily removable
tosses; means de?ning a plenum chamber extending along
for cleaning.
at least one side of the channel; a slit formed in at least
16. An apparatus according to claim 11 in which the
one of said upstanding sides adjacent the floor ‘and com 15
means de?ning the plenum chamber includes a portion
municating with the plenum chamber; and means for
extending parallel to said ?oor and beneath material in
injecting an aeriform ?uid through said slit whereby said
said channel.
?uid ?lls the space between said vibrated material and
said ?oor, when said material is tossed free of said ?oor,
References Cited in the ?le of this patent
and then ‘continues up through said materials.
20
UNITED STATES PATENTS
11. In an apparatus for treating masses of discrete
particles of materials, in combination, a channel having
side walls and an imperfora-te ?oor; means for vibrating
the channel to toss material therein free of the floor;
means extending along at least one of said side walls and 25
into close proximity .to the ?oor for de?ning a plenum
chamber; said means providing a slit extending along said
channel near the ?oor thereof; and means for supplying
aeriform ?uid to said plenum chamber for discharge par—
1,761,149;
Peebles ________________ __ June 3, 1930
2,164,056
2,385,140
2,795,318
2,847,767
Engelrnann ___________ __ June 27,
Knowles _____________ __ Sept. 18,
Morris _______________ __ June 11,
Carrier ______________ __ Aug. 19,
1939
1945
1957
1958
FOREIGN PATENTS
512,036
Great Britain _________ __ Aug. 28, 1939
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