close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3079713

код для вставки
March 5, 1963
3,079,703
B. R. ANDREWS, JR., ET?AL
RADIANT HEAT CLOTH DRIER
Filed March 11, 1960
4 Sheets-Sheet 1
a,
2. 4
v
INVENTORS
BERNHRD 1?. HNDREM/SJK
BY PAUL GOOD/P/Cf/
i
. C;
,
?TTOR/VEY
Mam}! 5, 1963
B. R. ANDREWS, JR., ETAL
3,079,703
RADIANT HEAT CLOTH DRIER
Filed March 11, 1960
776.5 1;,?
4 Sheets-Sheet 2
5
46 17 ?IM44
l;
20
lid/
36
3 _
JNVENTORS
BERNARD re. A4/0RA?WI/k
BY
_ paw. @qa/JR/w/
'
Q; ?
Arrow/5y
March 5, 1963
B. R. ANDREWS, JR, ETAL
3,079,703
RADIANT HEAT CLOTH DRIER
Filed March 11. 1960
,
4 Sheets-Sheet 3
F/GB
26
24'
24
3/
Z
'
32
Z
RM
1
Z
7
[W /gw
? ?
INVENTORS
B? edwcz閚g?i
arrow/�
Marqh 5, 1963
B. R. ANDREWS, JR., ETAL
3,079,703
RADIANT HEAT CLOTH DRIER
Filed March 11, 1960
4 Sheets-Sheet 4
INVEN TORS
5 ERA/19190 R. FIVDREWJ'J?Q
By 9901. Game/cl)?
HT ram/5y
a
ilnited
inc
3,�7�Patented Mar. 5, 1953
1
2
3,979,703
all the rolis of both of the rows A and B, as shown in
FIG. 1. The cloth is delivered from the chamber 3
Bernard R.RADIANT
Andrews, in,
ERAS-'1?
andCLGTH
Pan! Goodrich, Hingham,
?nes.)
(Both of 336 Adams ., Dorchester, Boston 22,
ass.
Filed Mar. 11, 1966, Ser. No. 14,458
9 Claims. (Cl. 34-457)
through a delivery opening 14.
A supporting roll 12a for the cloth is shown just outside
of and beneath both the inlet opening 13 and the de
livery opening 14. With this arrangement there will be
a straight stretch 15 of cloth located in each space 11
which is de?ned by each two adjacent panels, the top
face of each straight stretch facing and situated closely
This invention relates to an apparatus for heat treating
by radiant heat cloth or other material in web form, 10 adjacent to the bottom of the panel above it and the bot
either for the purpose of drying it or for some other pur~
tom face of each straight stretch 15 facing and situated
pose.
closely adjacent to the top of the panel below it. Each
straight stretch or ?pass? 15 of the cloth therefore has
One object of the invention is ?to provide a novel device
a panel both above and below it and is equally spaced
of the above type in which the elements generating radiant
heat are in the form of hollow panels, preferably steel 15 from both panels, and each panel has a straight portion
panels, and which are supplied with heated air from ?an air
heating means by a novel system of forced circulation by
which the heated air is circulated into and through the
various panels and is then returned to the air heating
15 or pass of cloth both above and below it. While the
rolls 12 may be mounted in any suitable way, yet in the
construction shown each roll is provided at each end with
an end portion 59 that has a reduced diameter and these
means.
20 .end portions extend through the casing 1 and are sup
ported in bearings 51 that are carried by a supporting
Another object of the invention is to provide an ap
frame 52 that is exterior to the casing.
paratus of this type which is so constructed that the
Each panel 3 is heated to the proper temperature by
heated panels can be quickly cooled by using the same
delivering into its chamber 9 air which has been heated
air circulating system that was used for heating the panels.
Other objects of the invention will be apparent from 25 in the air heating chamber 4. For this purpose a fan 16,
which is located in the air heating chamber 4, takes
the following description of one embodiment thereof.
In the drawings:
heated air from said chamber and delivers it into the
bottom of a vertically extending duct 17 which
FIG. 1 is a vertical section through a device embody
is located along the side edge of the stack of panels and
ing the invention taken on the line 1?-1 of FIG. 2, with
parts broken out;
which is provided with a series of openings or ports 18,
one of which communicates with the chamber'9 of each
FIG. 2 is a section taken in line 2-2 of FIG. 1; 1
of the panels 8. A second vertical duct 19 also extends
FIG. 3 is a section taken on line 3-3 of FIG. 2;
along the side of the stack of panels and has a series of
FIG. 4 is a section taken on line 4??4 of FIG. 2.
openings or ports 21, by which said duct also has'a
FIG. 5 is a view of the driving means for the cloth
supporting rolls.
35 communication with the chamber 9 of each of the panels
8?. The lower end of said duct 15? is open to the air heat
The device herein illustrated includes a casing 1 which
ing chamber 4 as seen at 19a.
is divided by a horizontal partition 2 to provide an upper
heat-treating or drying chamber 3 in which the cloth or
When the fan 16 is operating, therefore, it will take
heated air from the chamber 4 and \force it upwardly in
other web material is heat-treated or dried, and a lower
> the duct 17 and through the openings 13 into the cham
chamber 4 which contains means for heating the air that
is circulated through the panels to heat them.
? bore '9 of the panels 8. Air in the chambers 9 will be
While any suitable means may be used to heat the
forced out of the panels into the duct 1?) through the ports
air, there is illustrated for this purpose gas burners 5,
21 and this together with the reduced pressure in the
each of which is supplied with gas by a supply pipe 5,
chamber 4 due to the suction created by the fan it?;
vwhich preferably has a valve 7 therein by which the
will produce a down draft in the duct 19, which will carry
operation of the burner can be regulated.
45 the heated air in the chamber 9 or? the panels 8 back into
The panels by which the radiant heat is generated are
the air heating chamber 4, where it will be re-heated pre
indicated at 8. Each has a ?at shape and has an interior
paratory to being again circulated through the panels 8.
? chamber 9, the opposite faces 19 or? each panel being ?at
? There will, therefore, be established 1a continuous ?forced
and parallel to each other. These panels are arranged one
circulation of heated air from the chamber 4 upwardly
above another in stack formation and with a space 11 be 50 through the duct 17 and into and through the chambers
tween each tWo adjacent panels. The manner in which
9 of the various panels 8, ?and from said chambers into
the panels are supported will be presently described.
the duct 19 and back into the chamber 4. The straight
? Associated with the panels are two vertical row-s of
stretches 15 or" the cloth 2% that occupy spaces 11 be
cloth supporting rolls 12, said rows being indicated at A
tween the panels 8 will each be subjected on ?both sides
and B, and being placed on the opposite sides of the stack 55 to radiant heat emanating-from the panels above and
of panels. A roll 12 of row A is placed adjacent to and
below it and will be dried in a still atmosphere which is
parallel with one edge of every other panel 8 of the
relatively free from ?air currents. The moisture which is
stack, and one roll of the other row B is adjacent to and
evaporated from the cloth during thedrying operation is
parallel with the opposite edge of each of the other panels
withdrawn from the chamber 3 of the casing 1 by 21 Sue?
of the stack. Each roll has a diameter somewhat greater
tion pipe 69 which is connected to a suction'fan which
than the ?thickness of each panel.
is shown generally at 26 but without reference to any
The cloth 2% to be dried or heat-treated is fed to the
detail structure. During the drying or heat treating opera
casing 1 through an inlet opening 13 and passes under
tion said fan may be operated at a low speed which is
neath the bottom panel 8, to and around the bottom roll
suiilcient to carry away the evaporated moisture as fast
12 of the row B, and thence through the space 11 be 65 as it is released from the cloth.
'
tween the bottom panel 8 and the second panel from the
The cloth 20 being dried or heat treated is fed through
bottom, to and around the bottom roll of the row A,
the chamber 3 by giving rotary movement to the cloth
thence back across the chamber 3 through the space 11
- supporting rolls 12 of one of the two vertical rows of
between the second and third panels from the bottom-of
rolls, i.e., the vertical row at the right-of the stack of
the stack to and around the second roll 12 from the bottom 70 panels 8 in FIG. 1 and which is indicated at B. For this
of row B, and so on until the cloth has been laid around � purpose one of the reduced end portionsStl [of each roll
3,079,703 ?
3 .
12' in the row of rolls indicated at B has fast thereon a
sprocket wheel 43 which meshes with and is driven by
a sprocket chain 44 that in turn is driven by a sprocket
ly cool them to a point below which the cloth would
not be damaged even if it came into contact with a panel.
When a cloth drying machine is used to dry cloth which
has been impregnated with dye or ?nishing materials by
wheel 45 fast on a driving shaft 46, which shaft may be
driven from any vsuitable source of power (not shown).
Inorder to maintain a proper driving engagementbe
tween the sprocket chain 44 and the sprocket wheels 43,
circulating drying medium over the web, there is a tend
ency for thin areas of the web to become dry before the
thicker portions with the result that the ?nishing material
there is provided a series of separate idler sprocket wheels
47 which engage the sprocket chain 44and are so mount
ed on'the ?frame 52 that each sprocket wheel 47 compels
or dye migrates from the still wetter areas to the drier
10 areas. This results in an uneven color in the dried web.
the,sprocket chain 49 to travel part way around each
sprocket wheel 43 as shown in FIG. 5.
4
cool air through the chambers 9 of the panels 8 will rapid?.
'
There has been described above a forced air circulat
ing system bywhich air is taken from the chamber 4
and vforced upwardly in the ducts 17 and into and through
the chambers 9 of the panels 8 and from said chambers
downwardly throughgthe ducts 19 back into the air heat- .
ingchamber 4. A feature of theinvention is that this
This phenomenon occurs only during the earlier stage of
the drying cycle._ We have found that the use of rela
tively low temperature radiant heat generating elements
and a longer exposure of the web to the radiant heat
generated thereby will remove the water or solvent from
the cloth during the early'drying stage with little or no
migrating movement of the ?nishing material or dye. As
a result the ?nishing material or dye will be as evenly
distributed in the dried fabric as it was when the fabric
same forcedv air, circulating system can also berused to
left?the'impregnating
pan or coater. In the apparatus
20
cool r-apidly'the heated panels '8 if it is desiredto do so
herein'shown the heating of the air in the chamber v4 may
asgto prevent the cloth from becoming overheated or
be so adjusted as to heat the panels 8 to the temperature
required .to prevent or reduce the migration abovereferred
This is accomplished by providing the upper end of
to, and the manner in which the cloth is supported inthe
each duct 19 with an extension 24 which passes through
the top of thecasing ,1 and leads to the inlet of a suction 25 drying chamber 3? provides the desired longer exposure
of any portion of the cloth to the radiant heat generated
fan26.: Each extension'24 hastherein a balanced dis
by
the panels 8.
charge valve 25 which automaticallyremainsclosed as?
scorched.
'
1
e
-
,
'
shown'in'FIG. 3 during the normal operation of thede
We
1. An
claim:
apparatus
. for
I heat treating material in. web
_
form,
.
vice and while the cloth is being heat treated or dried.
Said suction fan can be operated by a suitablecontrol 30 comprising an air heating chamber, a ?plurality of ?at,
device .(not shown) to run either at a low speed or at a
high?speed. The balanced discharge valves 25 are each
hollow, radiant-heat generating panels arranged horizon?
tally one above another in stack formation with a space
between each two adjacent panels, said panels being sub
shown as comprising a ?at valve member 30 which is
pivoted to one side wall of the corresponding extension 35 stantially rectangular in plan view with a width greater
than the width of said web and imperforate over thearea
24 as shown at 28 so that said valve member can swing
of each panel to provide a series of horizontal ba?les for
from a closed position resting on the valve seat 29 as
inhibiting convection air currents, means to deliver heated
shown in full lines FIG. 3 into an open position shown
air from the air heating chamber into the interior of
?in dotted lines, thereby opening a direct communication
'each panel thereby to heat the panel, and means to feed
between the upper end of each said duct 19 and the
a length of web material through each said space suc
suction fan 26. Each valve member 30 is weighted to
cessively, whereby both sides of. the web material in'each
hold it normally in closed position by means of a weight
space will be subjected to radiant heat from the panels
31 mounted onian'arm 32 that is rigid with the valve
member and extends upwardly therefromv at an angle
2. An apparatus ?for heat treating'material in web form
thereto as shown in heavy lines in FIG. 3. The suction 45
as de?ned in claim 1, and which includes a supply duct
developed by'the fan 26 when it is being operated at low
which has a separate communication with the interior
speed is sufficient to withdraw from the dryingchamber
of each panel, a return duct whichhas a separate com
3'Ithe evaporated moisture as it is separated from the
munication with the interior of each said?panel and also
cloth'during the drying operation, but is insu??icient vto
"lift the weighted valves 30 so that said valves will-remain 50 withsaid air heating) chamber and a fan associated with
said supplyfduct to provide forced circulation ofithe air
closedwhile the cloth is being'dried or heat treated.
de?ning said space.
" ' When it is desired to cool the heated'panels, the burners
a
.
V
a
V
..
.
i
from the air heating chamber into and through the panels
and through the return duct back into the air heating
5 will be? set'at low heat, and the suction fan 26 will be
adjusted to run at high' speed. The high speed of said
suction fan will develop an increased suction therein 55 e . 3-. A radiant-heat cloth drier comprising an; air heating
chamber, a plurality of, hollow, ?at radiant heat generat
which is su?'icient to overcome the closing tendency of
chamber.
-
1
1
the? weights 31 on the valve members 30 and to hold said
valves open as shown in dotted lines in'FIG. 3.
-ing panels situated horizontally one above, another in
?stack formation and spaced vertically from each other,
? The lower end of each of'the ?ducts 17 also communi
a forced circulation of the heated air in the air heating
chamber through said duct and into each panel, means to
lfeed a length ofv cloth through the, spaces between the
said panels being substantially rectangular in plan view
I. The opening of the valves 30 provides direct communi4
with
a width greater than [the width of said web and
cation between the upper ends of the ducts 19 and the 60
imperforate over the area of each panel to provide a series
extensions 24, and since said extensions are open to the
?of horizontal bai?es for inhibiting convection air currents,
'suction inlet of the fan 26, the opening of said valves
a vertical duct at one edge of the stack of panels and
provides a direct communication between ?said ducts and,
forming a communication between the air heating'cham
said suction inlet. Said ducts 19 also communicate with
the chambers 9 of the panels 8 through?the openings-21. 65 her and the interior of each panel, meansrto establish
cates with the chamber 4 and the side wall of each duct
17 has openings 18 leading into the chambers 9 of.the
various panels 8. Thus by increasing the?speed of the fan '
panels of said stack successively whereby the. clothiin
26 to a point at which the 1suction developed thereby is 70 each space is subjected on both sides to the radiant heat
* sufficient to open the valves 30, there will be established
'a'current of cool air through the swinging valve 38 into
'the'chamb'er-4, up the-ducts 17 ?and through-the panels,
8 into the ducts 9 and; hence through the extensions 24
to the suction inlet of the fan 26. The passage of this 75
? generated by the two panels that de?ne said space, a sec
ond vertically extending duct forming a second communi
cation between the interior of each panel andlthe, air
heating chamber through which the air in each panel is
returned to the air heating chamber.
5
3,079,703
4. An apparatus for drying material in web form com
prising, an air heating chamber, a plurality of ?at, hol
low, radiant-heat generating panels arranged horizontally
one above another in stack formation with a space be
tween each two adjacent panels, said panels being substan
tially rectangular in plan view with a width greater than
the width of said web and imperforate over the area of
located in and normally closing said duct extension which
valve is unaffected by the suction of the suction fan when
it is operating at low speed but which will be opened by
the increased suction produced by said fan when it is oper
ating at high speed, thereby creating a strong updraft in
said duct extension and second duct which draws the air
in the panels into and through said fan, and means to
each panel to provide a series of horizontal ba?ies for
reduce the generation of heat in the air heating chamber
inhibiting convection air currents, means to deliver heated
and to admit outside air thereto when the suction fan is
air from the air heating chamber into the interior of each 10 operating at high speed, whereby cool air will be de
said panel to heat said panel, means for feeding a length
livered by the forced air circulation through the panels,
of web material through each said space successively,
thereby cooling them.
means for continuously removing the air from the interior
8. In an apparatus for heat treating material in web
of said panels and returning it to said air heating chamber,
form having an air heating chamber, a drying chamber
and means for continuously withdrawing moisture released
having a plurality of ?at hollow radiant-heat generating
by said heat treating process.
panels arranged horizontally one above another in stack
5. Apparatus as de?ned in claim 4 further character
formation with a space between each two adjacent panels,
ized by said radiant-heat generating panels and said web
means for delivering heated air from the air heating cham
feeding means being contained within a drying chamber,
ber into the interior of each said panel, means for exhaust
and a suction fan in communication with said drying 20 ing air from the interior of each said radiant-heat gener
chamber, said suction fan being operable to exhaust
ating panel comprising a duct in communication with said
moisture laden air from said chamber.
panel and said air heating chamber and means for feeding
6. An apparatus for drying material in web form com
a length of web material through each said space between
prising an air heating chamber, a plurality of ?at, hollow,
said panels successively; means for quickly introducing a
radiant-heat generating panels arranged one above an~
supply of cool air into said apparatus for the purpose
other in stack formation with a space between each two
of terminating the heat treating process, comprising a duct
adjacent panels, a vertical row of horizontal web sup
extension formed on said duct for exhausting air from
porting rolls on each of two opposite sides of said stack
said panels, said duct extension communicating with ?a
of panels, means supporting the rolls of the two rows
suction inlet of a suction fan, said suction fan being oper
of rolls so that the passes of the web from the rolls of 30 able at a high and a low speed, a balanced valve posi
one row to the rolls of the other row are located in the
tioned in said duct extension normally closing said duct
spaces between the panels, means to feed the web through
extension and being adjusted to open said duct extension
said spaces, a vertical supply duct at one side of the stack
of panels which has communication at one end with the
only when said suction fan is operated at said high speed,
and valve means located in said air heating chamber for
air heating chamber and also has communication with 35 admitting a supply of cool air into said chamber upon
the interior chamber in each panel, a vertical return duct
reduction of air pressure therein, whereby upon operation
on the other side of said stack of panels communicating
of said fan at high speed said balanced valve is opened and
at one end with said air heating chamber, and also hav
a flow of air is created in said duct extension, associated
ing communication with the interior chamber of each
duct for removing air from said panels and said air heat
panel, means to establish forced circulation of the heated 40 ing chamber causing a reduction in air pressure in said
air from the air heating chamber through the supply duct,
chamber whereupon said valve means therein open to
into and through each panel and through the return duct
admit cool air thereby cooling said ?apparatus.
back into the air heating chamber.
9. Apparatus as de?ned in claim 8 where said suction
7. An apparatus for drying material in web form com
fan is provided with a suction inlet in communication with
prising an air heating chamber, a plurality of flat, hollow
said drying chamber whereby upon operation of said fan
radiant-heat generating panels arranged horizontally one
at said low speed moisture laden air in said chamber may
above another in stack formation with a space between
be exhausted therefrom without opening said balanced
each two adjacent panels, a vertical supply duct providing
valve in said duct extension.
a communication between the ?air heating chamber and 50
References Cited in the ?le of this patent
the interior of each panel, a second vertical duct also
providing a communication between the interior of the
UNITED STATES PATENTS
panels and the air heating chamber, means to feed a web
of the material to be treated through said spaces succes?
sively, means to establish a forced circulation of air from
179,289
1,555,957
the air heating chamber through the supply duct and into
and through the panels and also through the second duct
back into the air heating chamber, a suction fan equipped
2,397,091
2,772,486
as usual with a suction inlet and capable of operating at
either a low speed or at a high speed, a duct extension 60
providing a communication between said second duct and
the suction inlet of said suction fan, a balanced valve
1,585,410
2,956,523
Field _______________ __ June 27,
Ybarrondo ____________ _._ Oct. 6,
Olofson _____________ _._ May 18,
Davis _______________ __ Mar. 26,
Johanson ____________ __ Dec. 4,
Cady _______________ .__. Oct. 18,
1876
1925
1926
1946
1956
1960
FOREIGN PATENTS
1,945
Great Britain _______ ______ AD. 1854
Документ
Категория
Без категории
Просмотров
0
Размер файла
762 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа