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Jan'- 7, 1947.
/ E.‘R. ‘ZADEMACH ETAL ‘
'
2,413,937
SECTIONAL NOZZLE STRUCTURE FOR DRIERS
Filed Aug. 19, 1941
3 Sheets-Sheet 1
_
I INVENTORS
Er/ch ft Zademach and
W/Y/Iam W Clarke
BY MQAM
AT TORNE Y5
Jan: 7, 1947-
E. R. ZADEMACH ETAL
_ 2,413,937
SVECTIONAL NOZZLE STRUCTURE FOR DRIERS
Filed Aug. 19, 1941
5 Sheets-Sheet 2
45
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Will/am W C/ar/re '
BY
9“
AT TORNE Y5
Jan. 7, 1947.
E. R. ZADEMACH ETAL
“2,413,937
SECT-IONAL NOZZALE STRUCTURE FOR DRIERS
Filed Aug. 19, 1941
3 Sheets-Sheet 3
INVENTORS
'/ Erich RZademach and
‘i? VW/I/bm W Clarke
BY
ATTORNEYé
Patented Jan. 7, ‘1947
2,413,937
UNITED STATES PATENT OFFICE
STRUCTURE FOR
DRIE RS
'
Erich R. Zademach, Elizabeth, and William W.
Clarke, Summit, N. 3., assignors, by mesne ‘as-l
signments, to Metalwash Machinery Company,
Newark, N. J., a copartnership
Application August 19, 1941, Serial No. 407,404
(01. 299-141)
6 Claims.
1
.
This invention relates to driers of the type in
which a restricted blast of air is directed against
articles to be dried, and especially to improve
ments in the construction and arrangement of the
structure for discharging and controlling the air
blast.
'
‘
The invention is illustrated in its application to
driers in which articles on a traveling conveyor
are exposed to a restricted stream of‘ air dis~
charged from relatively narrow elongated nozzles
extending transversely adjacent to the path to
the articles. In driers of this type it is important
to concentrate the stream in the zone of impinge
ment on the articles, since the impact of the air is
useful in mechanically removing or dispersing
2
charge ‘openings are arranged in alignment to
. produce the desired air stream. Speci?cally, each
discharge opening is advantageously somewhat
elongated to cooperate in producing the desired
type of air current, but is at the same time suffi
ciently close to the ideal circular contour to re
tain a substantial part of the e?iciency of the lat
ter.
'
l
The invention also includes an improved nozzle
structure particularly adapted for convenient
manufacture of the type of nozzle above indicated.
In particular, the nozzle structure is advan
tageously made in units which may be arranged
end to end to provide a nozzle of any desired over
all
width. ‘
r
‘_
‘
‘
drops or other accumulations of water. It is also
Another feature is the provision of an arrange
important to provide an air stream that is sub
ment
in which the air from the end openings of
stantially continuous and‘ uniform across the en~
the
elongated
nozzle unit is directed outwardly at
tire width of the conveyor. Consequently the air
an angle, thereby producing an air stream of
stream should be in the form of a relatively thin
maximum width for a given Width of nozzle. This
uniform sheet or curtain in the zone of effective
arrangement,
however, introduces an additional
action. It has also been found that since such
factor when nozzle units are positioned end to
driers are used to treat articles‘ having certain
end; and a speci?c purpose of the invention is to
contours and arranged in certain relationships on
the conveyor, it is desirable to provide a ?at 25 construct the outwardly de?ected end nozzle open
ings so that when they are located adjacent each
stream of the indicated type which impinges on
other at abutting ends of the nozzle units, the
the articles at a predetermined angle.
streams of air from such openings will balance
In prior constructions for producing a wide,
each other and be de?ected downwardly to form
?at stream of air it has been the practice to dis
charge the air from a narrow elongated opening 30 a uniform continuous portion of the air stream.
An additional purpose is to provide an e?icient
or short passage; but this arrangement is rela
streamlined nozzle construction which may be
tively inefficient, since there is excessive friction
‘readily introduced into an air discharge opening
and disturbance of the air stream. The provision
or short passage, and may be readily fastened in
of a series of holes in an air pipe is likewise in
' e?icient and presents di?iculties in obtaining the
desired volume without excessive pressures and
resistance.
‘
place therein.
Speci?cally, such construction
may be arranged to ?t readily into short sheet
metal air discharge nozzles of the type employed
in prior constructions.
‘
Air discharge nozzle designs have been de
veloped for general use which are relatively ef?
The invention likewise includes speci?c im
cient, and include, a round discharge opening with 40 provements in the structure and arrangement of
a specially contoured passage ?aring inwardly
each unit which facilitate the construction and
from the opening, the walls of which have an ap
assembly of units having properly contoured noz
propriate curvature in accordance with estab
zles. For this purpose each unit is made in two
lished principles of design. However, these prin
ciples are not directly applicable to air discharge
constructions of the type above indicated because
of the extreme length and narrowness of the dis
charge opening.
sections, which may conveniently be cast, avoid
ing any special processing for providing the proper
curvature to the discharge passage walls, and
which arereadily connected to form the unit.
Such connection may be accomplished by the
An important purpose of the invention is to
same means'that is used to mount the unit in the
provide an air discharge structure suitable for 50 discharge passage of the air supply construction.
providing a thin, substantially continuous air
‘ Other objects and advantages will appear from
stream in any desired width with improved effi
the following description considered in conjunc
ciency and uniformity. This is in general accom
tion with the accompanying drawings in which
plished by devising a nozzle construction in which
Fig. 1 is a diagrammatic longitudinal vertical
a series of properly contoured and related dis 55 section through the discharge end of a drier pro
2,413,937
3
4
margin of wall iii) to provide an elongated open
ing extending substantially across the entire
invention;
width of conveyor 2i to end walls as of nozzle 23.
Fig. 2 is a detail fragmentary vertical section
A throat plate 43 extends inwardly from the
through one of the upper swinging nozzles;
lower edge of the front wall (it for a short dis
Fig. 3 is a fragmentary side elevation of a lower
tance and then is deflected upwardly and toward
nozzle construction with parts broken away;
said wall to provide a short air discharge passage
Fig. 4 is a fragmentary transverse vertical sec
M, plate £3 extending across nozzle 25 to end
tion through the discharge portion of another
walls £52 and being suitably attached at its upper
type of lower nozzle construction;
and lower edges to front wall
as by welding.
Fig. 5 is a rear elevation of a depending upper 10
It was found that the efficiency of air discharge
nozzle indicating the paths of the air vstreams
through passage M is substantially increased by
from the nozzle openings;
providing a suitable air outlet structure in said
Fig. 6 is a fragmentary top view, in section,
passage which will provide a plurality of outlet
of an end portion of a multiple unit nozzle con
passages properly contoured and arranged for in
15
struction with parts broken away, taken from
creased efficiency and reduced resistance in pro~
the supply side of the nozzle, on the line 6-6
ducing the desired air stream below the passage.
of Fig. 9;
This is accomplished by inserting in passage M
Fig. '7 is a vertical section on line 1—1 of Fig. 6;
an outlet strip @5 provided with aligned end pas
Fig. 8 is a bottom view of the construction
sages 46 and intermediate passages ill which
20
shown in Fig. 6 from the outlet side; and
are substantially continuous at their inlet ends
Figs. 9, 10 and 11 are fragmentary transverse
and which taper toward outlets 138 and 2-9, re
vertical sectional views on lines 9-3, 12-40 and
spectively. The latter are substantially shorter
H--ll of Fig.7.
than inlets G6 and Ill, and advantageously are
The invention is illustrated in its application
not more than three times as long as they are
to a drier of the type disclosed in the pending 25
wide, the form illustrated having a length sub
application of Erich R. Zademach, Serial No.
stantially twice its diameter.
325,845, ?led March 25, 1940, for Drier, which
Passages st and ?ll may be suitably contoured
employs the same general construction as that
in accordance with present engineering prac
set forth in the patent to Zademach No. 2,137,104
tice, as in the form illustrated, in which the end
issued November 15, 1938. The drier includes a
walls are concave as indicated in Figs. 6 and '7,
casing 20 enclosing an endless conveyor 2! of '
and the side walls converge toward the outlets
openwork metal construction through which air
{l8 and 59 as illustrated in Fig. 10. It has been
passes freely, arranged to discharge articles
found advantageous to form each intermediate
through the discharge opening 22 onto apron 23.
vided with air discharge nozzles embodying the
passage 4".‘ with side walls 50 which converge
The articles on conveyor 2| are subjected to a 35
sharply from the inlet for about half the dis
series of air streams directed downwardly from
tance to the outlet, and then are substantially
the outlets of a series of flat transverse depend
parallel for the remainder of the distance.
ing air spouts or nozzles 24 each pivotally con
Each end passage 46 is similarly contiguous
nected at its upper end to air supply ducts 25 and
except
that the lower portion 5i of wall 50 and
40
to a series of air streams directed upwardly from
the registering lower part of outer end wall 52
lower nozzles 2i; in air supply ducts 2'! extending
are parallel and inclined toward the end of the
transversely below the conveyor 2i. Only the
strip 135, diverging from the direction of the side
nozzles 24 and 26 nearest the outlet 22 are illus
walls 53 of the adjacent intermediate passage 47.
The drier also includes a pair of air curtain ~15 This arrangement provides somewhat flattened
air streams discharge from openings £39 in a
nozzles 28 and 29 arranged to direct air streams
direction parallel .to the sides and ends of pas
downwardly and upwardly, respectively, in the
sage 46, while the stream from openings 48 are
same plane to provide a joint air curtain ar
parallel to the side-s of said passage but are di
rangement which will tend to minimize the flow
of air into or out of the drier without interfering - rected outwardly toward the ends thereof.
It has been found that when the passages 45
with the passage of the articles through the out
and 41 are arranged and contoured in the indi
let 22.
cated manner, a smooth, compact stream of air
A suitable arrangement for adjusting the an
will be discharged from each outlet t8 and lit-i
gular position of nozzle 24 is provided including
and
will retain its direction and identity, the
an adjusting arm 30 connected to each nozzle
streams merging into a smooth, compact curtain
and pivoted at its lower end to an adjusting rod
of air with a minimum of loss through turbulence
3| connected to adjusting lever 32 on shaft 33 eX
or marginal diversion into the adjacent air.
tending outside of casing 20 and appropriately
In order to manufacture the outlet strip G5 with
rotated to adjust the swinging nozzle 24 by suit
the rather complicated contours desirable for
able means (not shown), one arrangement being
passages 66 and 41, strip 45 is constructed in two
illustrated in the patent above mentioned.
complementary sections 53 and 53, each formed
Nozzles 2d, 26, 23 and 29 are all adapted and
with one-half of Walls 5i and 52, which are sub
intended to discharge air in the form of a rela
stantially continuous when sections 53 and 54 are
tively thin sheet or stream in a predetermined
trated.
-
'
plane, which in the case of nozzle 24 can be ad
justed by swinging such nozzle about its axis.
- held together in assembled relation. A suitable
construction may be provided to assure con
venient and accurate registry of the sections such
as low conical p-rotuberances 55 in the portions
of outside walls 52 carried by section 53, ?tting
accuracy and ef?ciency, requiring less pressure 70 into registering conical depressions 58 in the
‘portion of said walls carried by section 54,
and power for the same results, and including a
Suitable means is provided for holding sections
simple and strong construction. Speci?cally,
53 and 54 in assembled relation, as well as for
each nozzle 24 is made of sheet metal and in
mounting outlet strip 45 in passage 45; and a
cludes a front wall iii! and rear wall ill, the
latter being curved forwardly toward the lower 75 feature of the disclosed construction is the pro~
Each of said nozzles is shown as constructed at its
outlet in accordance with the invention to pro
vide a stream of the desired type with increased
5
2,418,937
vision of an arrangement in which the same re
taining elements serve both purposes. This ar
rangement includes a plurality of retaining mem
bers 51 engaging wall 4| and throat plate 43,
abutting end to end relationship, eachof said
units including a series of Walls extending across
said‘passage and spaced lengthwise thereof, said
which lie flat against opposite faces of the strip fit walls being of substantial length in the direction
of air flow through said passage to form between
45, said members passing through suitable open
each pair of adjoining walls a nozzle passage of
ings 58 in the strip located in'the space between
predetermined cross~section and of substantial
adjacent passages 46 or 41. It is convenient to
length, each of said nozzle passages being periph
have openings 58 substantially larger than mem
bers 51 for convenience in rapid insertion of the 10 erally closed on all sides and communicating at
its inlet end with said manifold chamber, said
members, eliminating the necessity for extreme
nozzle passages being aligned along the length
care in registering the members with apertures
of said manifold discharge passage and being
58 and permitting ready alignment'of strip 45
separated by said walls, the lengths of said walls
with the margins of passage 44.
between the discharge ends of adjoining nozzle
For economy and lightness the portions of strip
passages being substantial, whereby the air from
45 intermediate the air passages may be cut awair
said manifold chamber is discharged through said
so that walls 50 have only the thickness necessary
nozzle passages at high velocity in separate nar
for structural strength, leaving a substantial
row widely spaced streams and said streams are
clearance space 59 between said walls extending
gradually merged into a single thin stream at a
' downwardly and outwardly from openings 58.
region spaced from the discharge ends of said
Retaining members 51 may conveniently be bolts
or screws, and are illustrated as screws which
may be conveniently and rapidly screwed into
apertures in the Wall of throat plate 43 in known
manner.
The outlet strip 45 may conveniently be pro
nozzle passages, the end nozzle passages of each
nozzle unit having their axes diverging outwardly
in the longitudinal plane of said discharge pas
sage, the intermediate nozzle passages between
said end nozzle passages having their axes ex
tending substantially parallel in the plane of said
vided in the form of a series of outlet units 69
first-mentioned axes and diverging outwardly
in endwise abutment with each other and with
with respect to said latter axes.
end walls 42 of nozzle 24. In this arrangement
2. An air nozzle construction for drier and the
it will be evident that the passages 46 adjacent 30
like comprising a manifold chamber having par
abutting ends of unit 60 will be arranged to direct
air streams through outlets 46 in directions which
will intersect a short distance below strip 45 as
indicated in Fig. 5. At» the same time the air
streams from the intermediate outlets 49 will ex- '
pand laterally and intersect at a predetermined
distance between the lower edge of nozzle 24, the
various air streams forming at that distance a
continuous relatively concentrated air stream
adapted to impinge upon the elfectively dry ar 40
ticles traveling along the conveyor through said
stream.
A similar passage outlet construction is pro
vided for lower nozzles 26, which are provided
allel sides de?ning an elongated discharge pas
sage, a nozzle unit in said passage split longi
tudinally into two sections and comprising a
series of walls extending across said passage and
spaced lengthwise thereof to form between each
pair of adjoining walls a nozzle passage, said
nozzle passages being aligned along the length
of said manifold discharge passage and being
separated by said walls, the lengths of said Walls
between the discharge ends of adjoining nozzle
passages being substantial, whereby the air from
said manifold chamber is discharged ‘through
said nozzle passages at high velocity in separate
with walls 65 forming a narrow passage directed 45 narrow widely spaced streams and said streams
are gradually merged into a single thin stream
upwardly and forwardly through conveyor 2 l. A
at
a region spaced from the discharge ends of
suitable outlet strip 45 is mounted in the nozzle
said nozzle passages, and mounting members
26 and is constructed and arranged in the same
passing through said walls between adjoining
manner as that already described.
Air curtain nozzles 28 and 29 are each provided 50 nozzle passages and secured to said chamber sides
for fastening said nozzle unit in place in said
at the discharge end with walls 66 de?ning a
discharge passage and for holding the two sec
narrow outlet passage into which an outlet strip
tions of the nozzle unit together.
_
45 is ?tted in the same manner. Passage's formed
3. An air nozzle construction for driers and
by walls 66 are located and arranged so that the .
?at air streams discharged from strips 45 in said 55 the like comprising a manifold chamber having
substantially parallel sides forming an elongated
discharge passage, a plurality of elongated nozzle
plane and will intersect adjacent the vertical
units in said passage extending in abutting end to
center of the drier to form a curtain of air as
end relationship, each of said units including a
already set forth. It has been found that the
substantially improved regulation of the air dis 60 series of walls extending across said passage and
spaced lengthwise thereof to de?ne a series of
charge curtain by the provision of scienti?cally
spaced nozzle passages aligned along said cham
contoured air discharge passages in outlet strips
ber passage, and mounting members for holding
45 is of substantial value in increasing the uni
said units in place in said passage, the end noz
formity of such air curtain and is effective in ob
passages will be in substantially the same vertical
structing the ?oW of air into or out of the drier. 65 zle passages of each nozzle unit having their
axes diverging outwardly in the longitudinal
We have described what we believe to be the
plane of said discharge passage, the intermediate
best embodiments of our invention. We do not
nozzle passages between said end nozzle passages
wish, however, to be con?ned to the embodiments
having their axes extending substantially parallel
shown, but what we desire to cover by‘Letters
in the plane of said ?rst-mentioned axes and
Patent is set forth in the appended claims.
70 diverging outwardly with respect to said latter
We claim:
axes, whereby air jets projected from said noz
1. An air nozzle drier construction comprising
zle passages merge at a region spaced from the
a manifold chamber having an elongated contin
discharge ends of said nozzle passages into a
uous discharge passage, and a plurality of elon
gated nozzle units in said passage extending in 75 single relatively thin stream.
4. An air nozzle construction for driers and
2,413,937
the like comprising an elongated nozzle‘ unit
having a series of transverse walls de?ning
a series of spaced nozzle passages aligned along
said unit, said unit being longitudinally split
into two sections, each section having a series
of recesses spaced along its inner face, the
recesses of the two sections being arranged in
opposed pairs, each pair of opposed recesses on
the two sections conjointly forming a correspond
ing unitary nozzle passage and having a common
outlet separated from the outlet of an adjoining
nozzle passage by a corresponding transverse wall.
5. An air nozzle construction for driers and
the like comprising a manifold chamber having
parallel sides de?ning an elongated discharge
passage, a nozzle unit in said passage compris~
ing a series of walls extending across said pas
sage and spaced lengthwise thereof to form be
tween each pair of adjoining walls a nozzle pas~
sage, said Walls between adjoining nozzle passages
defining recesses closed from communication with
said manifold chamber, said nozzle passages being
aligned along the length of said manifold dis
charge passage and being separated by said walls,
the lengths of said walls between the discharge 25
8
ends of adjoining nozzle passages being substan-v
tial, whereby the air from said manifold chamber
is discharged through said nozzle passages at
high velocity in separate narrow widely spaced
streams and said streams are gradually merged
into a single thin stream at a region spaced from
the discharge ends of said nozzle passages, and
mounting members passing through said walls
and said recesses between adjoining nozzle pas
sages and secured to said chamber sides for hold~
ing said nozzle unit in place in said discharge
passage.
6. An air nozzle construction for driers and
the like comprising an elongated nozzle unit hav
ing a series of transverse Walls de?ning a series
of spaced nozzle passages aligned along said unit,
said unit being longitudinally split into two sec
tions, each recessed to include a portion of the
periphery of each nozzle passage, and mounting
members passing through said Walls between said
nozzle passages to hold said sections in face to
registry.
ERICH R. ZADEMACH.
WILLIAM W. CLARKE.
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