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Патент USA US2268014

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Dec. ~30, 1941.
2,268,014
C. P. BRlDGES
DIFFUSER
’
Original Filed Jan. 24, _ v1936
2 Sheets-Sheet 1
69
66
Dec. 30, 1941
C. P. BRIDGES
2,268,014
DIFFUSER
Original Filed Jan. 24, 1936
2 Sheets-Sheet 2
Patented Dec. 30, 1941
2,268,014
UNITED ‘STATES. PATENT OFFICE
2,268,014
_
DIFFUSER.
Charles P. Bridges, Dedham, Mass.
Original application January 24, 1936, Serial No.
60,611. Divided and this application March 2,
1939, Serial No. 259,377
1 Claim. ,(01. 98-40)
This application is a division of application
a conduit 34, (Fig. 4), connected to some suitable
Serial No. 60,611, ?led January 24, 1936, which
source of conditioned air. ‘ Connected to the con
has matured as Patent No. 2,152,238.
The present invention relates to the treatment
of material, more particularly to the absorption
of moisture from, or the addition of moisture to,
web material, and more speci?cally to diffusers
through which conditioned air is distributed to
.
duit 34' is a branch conduit 35 terminating in
vertical spaced relationship adjacent a face of
one of the passes of Web material. Connected
to the branch conduit 35 is a diifuser for dis
charging, against an associated pass or passes
of the web of material, air, suitably conditioned,
the web material.
delivered into the conduit 34. These diffusers
The principal object of the invention is to pro 10 may
be of two types, one discharging air in one
duce a diffuser, by which a rapid, uniform and
direction, vertically upwardly or downwardly,
even conditioning throughout the web of mate
rial is insured.
and the other discharging air in opposite direc
-
tions, vertically upwardly and downwardly. As
To the accomplishment of this object, and such
the latter kind of diffuser may be considered as
others as may appear hereinafter, the various
two of the single type secured together back to
features of the present invention reside in cer
back, it is considered desirable to describe in
tain constructions, combinations and arrange
detail only the double type of diffuser. '
ments of parts, all described hereinafter and
Considering the diffusers in detail, it has been
then set forth broadly and in detail in the ap
stated above that the diffuser is adapted to dis
pended claim.
20 charge air in opposite directions, both upwardly
The various features of the present invention
and downwardly. Viewing Fig. 4, it should also
will be readily understood from an inspection of
be stated that the diffuser is adapted to discharge
the accompanying drawings illustrating the best
form of the invention at present known to the
inventor, in which,
Figure 1 is a view in elevation of the diffuser;
Fig. 2 is a detail view in sectional plan taken
along the line 2-2, Fig. 1;
Fig. 3 is a detail view in sectional elevation
taken along the line 3-3, Fig. 2, and
Fig. 4 is a diagrammatic view in plan, partly
in section, showing the relationship of the dif
fusers to the web of material.
The present invention may be embodied in a
standard tentering frame, along which the web
of material travels in a plurality of passes.
In
the drawings, the tentering frame is merely in
dicated, as it forms no part of the present in
vention. Referring to Fig. 4, the tentering frame
comprises uprights l0, along which extends hori
zontal runs II, to which are secured tentering
hooks or clips, (not shown), for catching the
air both to the right and to the left, that is, in
opposite directions laterally. The diffuser is
25 located more or less centrally of the web pass
along its length, thereby providing that the air
discharged will travel generally lengthwise of
the pass towards its opposite ends.
The diffuser is very roughly Y-shaped, and is
provided with side walls 36, a flat top 31, and a
flat bottom 38 parallel to the top. The top 3‘!
and the bottom'38 are of the same shape and
extend three quarters or more of the way across
the web material, branching out beyond the mid
way point into right and left hand portions, as
shown in Fig. 4. The side walls 36 extend only
a short distance over the web material and with
the top 3'! and bottom 38 form a neck 39 for con
nection with the branch air conduit 35. At their
40 outer ends, the side Walls 36 are curved outwardly,
as shown at 40. Extending centrally between the
side walls 36 and connected to the top 31 and the
bottom 38 is a vertical partition 4|, (Figs. 2 and
l2. This general construction is well-known.
4), which extends along the top and bottom of
The tentering frame is suitably housed in an 45 the diffuser to the point where it branches off
enclosure provided with side walls l3 and I4, end
into right and left hand portions, at which point
walls [5 and I6 and a top, for convenience, (not
the partition 4| is joined to vertical walls 42 and
shown). This enclosure is located in a room of
43 which form a V and are joined to the edges
the mill or factory and provides that the heated
of the top and bottom of the diffuser. As shown
air, to which the web of material is subjected, 50 in Fig. 4, the apex of the V formed by the walls
is not directed into the room, with resulting
42 and 43 is directed inwardly.
discomfort to room occupants, and heat and air
In the construction just described, it will be
current losses from the tentering frame and the
seen that the diffuser comprises a conduit ex
web of material thereon.
tending part way across the web material and
Located at one side of the tentering frame is 55 provided with branches disposed away from each
side edges of the passes of the web of material
2,268,014
2
other and in the general direction of the oppo
site ends of the web pass. By reason of this
construction, air driven into the branch con
duit 35 and from there into the diffuser is guid
ed by the side walls 36, the top 31, the bottom 38,
the partition 4|, and the walls 42 and 43 into
currents directed generally in opposite direc
tions.
operation would have a low efficiency, because a
considerable quantity of the air would not come
into contact with the passes, and hence would not
absorb moisture. In order to provide for the
greatest e?iciency, the present invention con
templates that the air, in addition to being divid
ed into two oppositely disposed currents by
means of the partitions 4| and the walls, vanes,
and deflectors ‘associated therewith, shall also
Viewing Fig.2, it will be seen thatif the par
be
further divided into currents directed upward
10
tition 4| were the only de?ector intermediate
ly and downwardly, so that all the air strikes
the side walls 36 and if the walls 42 and 43
‘against the passes of material, and not just a
were alone relied upon to direct the air over
portion of the air.
the web material, the air in the neck 39 would
tend to pursue a straight course through the
diffuser until de?ected by the walls ‘42 and ‘43.
For this purpose, the discharge ends of the
=diffuser'are partially closed off between the top
This would obviously result vin an uneven dis
tribution of air over the web‘material, ‘the por
tions thereof adjacent the walls 42 and 43 re
‘Maud-50, \(Figs. 1., 2 and 3)
.31 .andthe bottom 38 by V-shaped de?ectors
The walls 5| and
‘T52 ‘forming-the '~V,"sfare preferably curvilinear in -
cross section, with the apex of the V’s directed’
inwardly of the diffuser. The de?ector 49 ex
20
tions of the material adjacent the side walls
tends‘between. the'wall 43 (or 42) and the outer
36 receiving the least air. This uneven distri
endiof the vane 44 asshown in Fig. 2, while the
bution of air would cause uneven drying of the
ceiving the greater part of the air, and the por
web material.
de?ector 50,'-which is shorter than the‘de?ector
49, extends between the outer end of the vane
To offset this tendency for-uneven air distribu
tion, the diffuser ‘is ‘provided interiorly iatweach 25 44 and the end of the curved portion 40 of the
side >wall~36. Thede?ectors'? and 50 are dis.
side of the partition 4| with vertical vanes or
posedito
eachzother at an angle of slightlymore
ba?‘les 4-4, 45 and .46, best shown in ‘Fig. -2. (The
than 90»degrees, (Fig.2) , and are provided with
ends of these vanes adjacent the neck-39 are
ends 53 and 54, respectively Referring to Figs.
aligned with the end of the partition ~4|, and
l-and 3~parti0ularlythe latter, the curved walls
the vanes are spaced'from each ‘other'and‘from 30 5l-extend‘upwardly
to a point slightly'below the
the partition 4| and the side wall136. 'I‘he‘vane
plane of the diffuser top 31, thereby, with the
44 has a curvature corresponding generally to
ends 53 and the top 31, de?ning for thede?ec
that of the curved portion 4|] of the wall 36-and
tor
~49 arectangular opening 55 and for the de
extends throughout slightly'more than ‘90‘ de
?ector
50 ‘a rectangular opening 56, both of
grees, so that air passing between it 'and the 35
which openings are located adjacent a pass of
wall curve 46 is directed slightly rearwardly
the web materiaL-and through which air is dis
towards the edge of the associated‘pass of ma
terial, rather than directly longitudinally there
of. The vanes~45iand46 control the path of the
charged "against the'pass. Similarly, the curved
walls 52 .extend‘downwardly to apoint slightly
air between the vane 44 and the walls 42 and 40 above the plane of the diffuser bottom 38,1there
by, with the ends 54-and the bottom 38, de?n
ing-for the deflector ~49 arectangular opening 51
and for the de?ector 50 a rectangular opening
Preferably, ‘the vanes -45 and “46 terminate
58 both of which openings are located adjacent
short of the edges‘of the diffuser top~31 and!
the next succeeding lower pass of the material
bottom v3'8, so that pivoted deflectors may be as 45 and through which air is discharged againstthe
sociated ‘with these vanes. Referring‘to Figs. \2
pass. It‘wi‘ll be seen that ‘with the iabove~de
and 3, adjacent the front‘ends of the vanes '45
scribed
construction, the curved walls 5| and 52
and 46, the diffuser is provided with ‘vertical
guide the air-in the diffuser upwardly and down
pins 41 on which are rotatably =moun'ted ~verti
cal deflectors 48 forming, in effect, adjustable 50 wardly, respectively, and that the plane of the
rectangular openings 55, 56‘, 51 and 58 are all
continuationsof the vanes 45 and 46. ‘With this
inclined to the'plan'es of ~the~passes of web ma
construction, the de?ect-ors‘48 serve to regulate
terial, thereby causing the air ‘discharged from
the paths of the air'emitting'from between-the
the openings to :strike vthe passes of material
vanes 44 and 45, 45 and 46, and‘46 and therpar
obliquely.
tition 4| and the wall -'42 ~(or'4-3),ia.nd'so ‘make
The-diffuser =is "interposed between two adja
it possible to have a more-even discharge of air
cent passes of the ‘web material and is, there
from the diffuser than'if merely stationarywanes
fore,1construct'ed~to ‘discharge airlboth upwardly
were used. Stated in another Wayfthe de?ectors
43 and function to change the path‘of portions
of‘the air at points ahead of the walls'42 and 43.
48 form partitions or'dividers, as it were, for
the opening bounded ‘by the top 31,‘th'e bottom
and downwardly. The-obliqueness of the planes
of th'erectangular‘di?user openings to'the planes
of the passes insuresthat all the ‘air discharged
38, the side wall 42 (or 43), "and the vane v44.
strikes thepasses and does not issue from the
Since the de?ectors '48 are'pi-vot'ed, they vmay ‘be
diffuser 'in a path "parallel to the passes. The
turned to vary'the size of'the discharge ends1 of
curved walls 36, the -V-walls 42 and 43, the vanes
the passages betweenthe wall 42 (or '43) --and
the vane 46, between the vaneY46 ‘and the'van'e 65 44, .4-5 vand 46, the‘ de?ectors v48, and the dis
position of the rectangular diffuser openings
45, and between the vane 45 and the vane ‘44.
angularly to'each other insure by their coopera
The construction so far described'provides fo'r
tion that the ‘air admitted into the neck '39 is
auniform distributionrof conditioned a-iriacro‘ss
spread evenly across-the ‘width of the passes of
the passes of material from oneside thereof to
the other and in opposite directions ‘longitudi
nally thereof. It will be apparent,‘however, that
without further air guiding means than those
above described, the air would be discharged
material. Upon issuing from. the diffuser, the
impelled air ‘strikes vthe adjacent faces of the
passes and-spreads therealong, both along their
length and also from one side edge thereof to
the other. In effect, the discharged air-forms a
from the diffusers in a direction parallel vto the
constantly
{moving blanket --cover_ing the entire
15
passes of the web material. Such {a mode ‘of
2,268,014
faces of the passes and absorbing moisture there
from as the air moves.
The passes of web material are relatively long
and sag to a certain extent between their points
of support in the tentering frame. As the dif
fusers and collectors, both single and double
3
These two systems are identical in all respects
with the centrally located vdiffuser‘, with the one
, exception that they are single. Stated in another
way, the single diffuser at‘the left in Fig. 4
has the same shape as the right hand portion
of the double diffuser and the right hand single
type, are positioned closely adjacent the passes,
diffuser in Fig. 4 has the same shape as the left
it is advisable to provide the diffusers with suit
hand portion of the double diffuser.
able guides, so that the web does not catch on
projecting points or edges. These guides com 10 The left hand diffuser, (Fig. 4), receives air
from a conduit 82, while the right hand diffuser
prise curved bands 86, the free ends of which are
receives air from a conduit 84. These conduits
connected to the top 31 and the bottom 38 of
may receive conditioned air either from the same
the diffuser, so that the curved portion of the
source of supply for the conduit 34 or from a
band extends outwardly from the diffuser. As
duplicate source of supply of conditioned air.
shown in Fig. 1, one band is located near the
Nothing herein explained is to be interpreted
V-wall 43 and the other band is located so as to
as limiting the present invention in the scope of
extend between the adjacent ends 53 and 54 of
its application to use in connection with the
the de?ectors 49 and 50. It will be understood
particular apparatus or particular mode of oper;
that both the right and left hand portions of the
ation or both selected for purposes of illustration
double diifusers are provided with guides 86.
and explanation. It will be apparent that the
With these guide constructions, the passes of the
present invention is capable of use with web
web material cannot contact sharp corners or
conveyors other than tentering frames, and with
edges and are thus protected from injury during
web
materials other than textile fabrics. While
their travel through the tentering frame.
the particular construction herein set forth is
In view of the foregoing, it is believed that 25 well suited to one mechanical form of the inven
the operation of the illustrated embodiment of
> tion, it is not limited to these details of construc
the present invention will be readily understood.
tion, nor to the conjoint use of all its features,
Air which is conditioned is impelled into the
nor is it to be understood that these particulars
, main conduits leading to the diffusers, from
which it is discharged evenly and uniformly 30 are essential, since they may be variously modi
?ed within the skill of the artisan without de
against the adjacent passes of web material.
parting from the true scope of the actual inven
The portion of the material which dries slowest
tion, characterizing features of which are set
determines the rate at which the web isrun
forth in the following claim by the intentional
through the machine, and since the discharged
use of generic terms and expressions inclusive of
air is spread uniformly over the passes, there 35 various
modi?cations.
is no opportunity for uneven drying and “shad
What
is claimed as new, is:
ing” eifects. Since the air does not travel
A diffuser for discharging impelled air hav
through the material, because of the texture
ing, in combination, a body portion comprising
thereof, the air travels over the material to its
a top, :a bottom, and walls joining the top and
side edges, insuring their drying as completely as
bottom to form a conduit having an intake end
that of the interior portion of the material away
and a discharge end offset therefrom, at least
from its side edges. After travelling over the
one vane extending along the body portion
side edges of the material, the air is collected
spaced from the walls for guiding the impelled
by the various collectors and is conveyed away.
air from the inlet end towards the o?set dis
It may be advisable to provide the ends of the 45 charge end, a de?ector pivotally associated with
passes as well as their mid portions with a dif~
the vane adjacent the laterally offset discharge
fuser, so that the passes can be subjected
end for de?ecting the guided air, and means for
throughout their length to the in?uence of heat
dividing the’ de?ected air into a plurality of op
ed air and so that this in?uence will be sub
stantially uniform throughout the entire sur 50 positely disposed currents in directions substan
tially normal to the direction of the de?ected air
faces of the passes. For this purpose, at the
after its passage from the in?uence of the de
left hand end of the passes, viewing Fig. 4, there
flector.
is provided a diffuser, and a similar provision
CHARLES P. BRIDGES.
is made at the right hand end of the passes.
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