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Патент USA US3067595

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Dec. 11, 1962
3,067,586
B. OFFEN
‘PROCESS AND APPARATUS FOR CHILLING PRINTED WEBS
Filed March 29, 1961
2 Sheets-Sheet 2
CHILL
ROLLERS
FIG_ 2
paligglslie
opvesz
52
50
TO
'2“
535g
54?
-44
5O
48
V
'0
o
DRYER 34'
sgglliléas
50
—->—&
Fl G. 5
INVENTOR.
Bernard Off‘en
“55mm 000
w’
youyalll
grates
lice
3,657,586
Patented Dec. 11, 1962
1
2
3,067,586
one ?rst roll through which unrefrigerated coolant is
circulated and at least one subsequent roll through
PROCESS AND APPARATUS FGR CHILLDIG
PRINTED WEES
Bernard Often, Chicago, 111., assignor to B. O?en &
Company, Chicago, Ill.
Filed Mar. 29, 1961, Ser. No. 99,095
9 Claims. ((11. 62--63)
which refrigerated coolant is circulated. As will be
apparent from the following description, such a system.
is capable of achieving the objects of this invention.
With reference to FIGURE 1, there is shown a plu
rality of cooling rolls 10, 12 and 14. The rolls 10 and
12 are connected through line 16 to a circulating pump
18 which controls passage of Water from a cooling storage
adapted for the chilling of printed webs, and it relates 10 tank 20 and a coolant recirculating cooling tower 22.
more particularly to a method and means for cooling
A by-pass line 26 is connected to the line 24 and
the ink on printed paper which has exited from a drier
is provided with a temperature control valve 28, the
apparatus.
7
latter having a thermostatic connection 30 within the
In conventional systems, webs are printed and passes
tank 20. If the temperature within the tank 20 reaches
through a drier which is heated to temperatures in the 15 a certain minimum value, as might occur in the winter
order of 300~350° F. The ink when subjected to tem
time, the valve 28 is automatically opened and coolant
This invention relates to a process and apparatus
peratures in this range becomes plastic, and therefore,
upon exiting from the drier, it is necessary to chill the
is passed directly to the storage tank from the rolls 10
and 12, thus by-passing the tower 22.
'
web to temperatures of the order of 100° F. or below.
As shown in FIGURE 1, the line 32 coming from
Prior cooling methods have employed refrigerated rolls 20 the pump 18 is adapted to pass coolant into line 34
or the like adapted for the circulation of city water, well
in addition to the line 16. Line 34 passes to an ice
water, refrigerated water, or cooling tower water. Dif
machine condenser 36 connected in series with an ice
?culties have been experienced, however, in the prior
machine 38 and a water cooler 40. The cooler 40 is
methods due to a lack of e?icient means for allowing
connected‘ to the roll 14 by means of a delivery line
for uncontrollable conditions affecting web cooling. For 25 42 and a return line 44. The auxiliary circulatory pump
example, where unrefrigerated water is employed, in
46 is associated with the line 44 to aid in circulating
many instances, the water is too warm to e?’ect the de
coolant through the roll 14. Return line 47 is provided
sired cooling due to warm weather or continued circu
to maintain circulation between the ice machine condenser
lation of the water through the rolls. Where refrigerated
36 and the cooling tower 22.
cooling is employed, there are many instances where the 30
It will be noted that the valves 31 and 33 are associated
degree of cooling is far beyond the necessary amount,
with the lines 35 and 37 which interconnect the roll 14
there being no means for control and economical use
with the line 16 and the line 24. By opening these valves,
of the cooling media. This condition results in an ob
coolant from line 16 can pass to roll 14, an arrangement
vious waste of energy employed to refrigerate the coolant.
which is desirable when it is not necessary to use the full
A highly desirable method and apparatus for chilling 35 refrigerative value of coolant in line 42. The coolant from
printed webs would be one which compensates for varia
line 42 may be partially employed, or the refrigerative
tions and conditions which effect web cooling. Such a
system may be completely by-passed by closing valves 43
system would be capable of providing the needed cool
and 45 located in lines 42 and 44, respectively.
ing effect under any conditions and without a waste of
The construction in FIGURE 2 illustrates adaptation of
40 the circulatory system of this invention to a continuous
energy.
It is, therefore, an object of this invention to provide
printing line. As shown, a roll 48 of web material 50
is unwound and passed through a printing press 52 to a
a process and apparatus for chilling printed Webs which
combines economy and e?iciency.
drier 54. The web 50 then passes to cooling rolls 10‘,
It is a further object of this invention to provide a 45 12 and 14 to which a circulatory system of the type
shown in FIGURE 1 is connected. It will be noted that
method and apparatus for chilling printed webs which
the rollers 10, 12 and 14 are arranged in such a fashion
eliminates the disadvantage resulting from variations and
that maximum surface contact between the web ‘and rolls
conditions effecting web cooling and provides means for
is achieved.
de?nite control and economical use of a cooling media.
The embodiment of this invention, shown in FIGURE
It is an additional object of this invention to pro 50
3, illustrates an apparatus having only two cooling rolls
vide a method and apparatus for chilling printed webs
10 and 14 to which a circulatory system of the type shown
which includes novel combinations of refrigerated and
in FIGURE 1 is adapted ‘to be connected. As will be
unrefrigerated coolant for circulation through a plurality
obvious from the following description of the operation,
of cooling rolls and which provides a dependable and
inexpensive manner for cooling such webs.
55 the inventive principles are applicable to systems with
various numbers of cooling rolls.
These and other objects of this invention will appear
The operation of this invention may be described as
hereinafter and for purposes of illustration, but not of
follows. Coolant, which is preferably water, is pumped
limitation, speci?c embodiments of this invention are
from cooling tower 22 and tank 20‘ by means of the
shown in the accompanying drawings, in which—
FIGURE 1 is a ?ow sheet diagram of the circulating 60 pump 18 to the line 32. One portion of the coolant
passes through line 16, circulates through the rolls 10
system of the present invention;
FIGURE 2 is a schematic side elevation of a possible ' and 12, and passes through line 24 to lines 26 and/or v
47, thus completing the cycle. A second portion of the
application of the concepts of this invention to a con
coolant in line 32 is continuously circulated through
tinuous printing line; and
FIGURE 3 is a detailed view of an alternative cooling 65 roller 14 while passing through condenser 36, ice machine
38, cooler 40, and the associated delivery and exit lines.
system adaptable for use in a continuous operation of
As shown in FIGURES 2 and 3, the web 50 is passed
the type shown in FIGURE 2.
through the printer 52 and drier 54 and then onto the
The present invention broadly consists of a system
chilled rolls. In FIGURE 2, the web passes ?rst over
wherein means including a plurality of cooling rolls
are provided for the cooling webs immediately as they 70 the rolls 1t} and 12 which are supplied with the cooling
exit from the printing and drying, such as of a con
tower water.
tinuous operation.
which is supplied with refrigerated water. It will be
The cooling rolls include at least
Finally, the web passes over the roll 14
3,067,586
3
apparent that the FIGURE 3 construction differs only
withrespect .to the elimination of roll 12.
In a typical printing operation, paper in the form of
means whereby all the circulating coolant passing through
fewer rolls can be employed where less severe tem
printing and drying of said webs, the improvement'com
said rolls is taken directly from said tower and tank.
4. In an apparatus for providing printed material on
a web is printed with ink and passed to a drier where
continuous webs including a printing press and a drier,
it isheated between- 390 and 350° F. With the tem
the improvement comprising means located immediately
perature of the cooling‘ tower water in the rolls 1% and
adjacent said drier for cooling said webs after exit from
12 as high as100° F., there is nevertheless su?icient
said drier, said cooling means including a plurality of
temperature di?ferential between the paper and the rolls
cooling rolls with coolant passages located internally
to cool the paper substantially. For example, paper
thereof adapted to transport said webs and adapted to
which contacts the roll It} at’ a temperature between 10 provide substantial surface contact with said webs, re
300 and 350° F.‘ has been cooled to about 200° F. even
frigerating means connected to at least one of the last
with. the relatively hot water in the roll‘ 10. After con
cooling rolls over which said web is to be transported and
tact with theroll 12, which also contains the relatively
adapted to circulate refrigerated Water through the pas
hot‘ water, the paper will cool to approximately 125° F.
sages in said last rolls, means for holding unrefrigerated
In order to cool the paper to between about 80° F. and
water and means for circulating said unrefrigerated water
90° F., apreferred ?nal temperature, refrigerated water
between said tank and through the passages in the other
passed through the roll 14 is maintained at a tempera
of said cooling rolls.
ture of below about .60" F.
5. in an apparatus for providing printed paper includ~
The abovedescription illustrates that approximately
ing a printing press for applying inks to said paper and
83% of the temperature drop from 350° to 85° F. is
teens for drying the ink on said paper, the improvement
achieved by means of the unrefrigerated coolant and only
comprising cooling means for cooling said paper after exit
17% was effected by refrigeration. It is. apparent that
from said drier, said cooling means including a plurality
considerably‘ more energy would be expended in order to
of cooling rolls having coolant‘ passages located therein.
achievethe entire drop by refrigeration, and it is clearly
adapted to transport said webs in successive'fashion, re
apparent that-the amount of chilling would be insu?icient 25 frigerating means connected‘ to at least one of the‘last
if tower water alonewere ‘employedx'in'. all‘ of‘the‘cooling‘
cooling rolls over'which said web is to be transported,
rollss
_
,
said refrigerating means being adapted to circulate re-'
As suggested. by FIGURES [and 3, it is important
frigerated coolant through the passages in said last rolls,
that substantial surface contact between the rolls and the
means for holding unrefrigerated ‘coolant and means for
web be achieved. This is. accomplished by circulating
circulating said unrefrigerated coolant between‘ said hold-'
the‘ adjacent rolls, whereby the moving ‘web is wrapped
ing means and ‘through the ‘passages in the other of said
around the roll‘ surfaces.- It will be apparent that the
cooling rolls.
number of rolls may be varied, and generally speaking,
6. In a method for cooling printed webs subsequent to
perature differentials are'experienced. In this latter con 35 prising providing a plurality of cooling rolls with internal
nection, where conditions are more severe, refrigerated
coolant passages for cooling said webs immediately after
coolant may be passedthrough two of the latter rolls.
said drying, transporting a printed and dried web over
As previously noted, it is apparent that the present
invention enables lay-passing of the refrigeration system
said rolls, circulating unrefrigerated coolant through the
passages in the ?rst of said rolls to be contacted by said
0r.only partial. use of'refrigerated coolant in the roll 40
web after drying and‘ circulating refrigerated coolant
1,4.where it
obviate the
roll 14.
It will be
be’made in
tacted by said web.
7. A method according to claim 6, including the steps
is possible to cool the web su?’iciently to
need; for; maximum. cooling effect of the
through the passages in the latter of said rolls to be con
understood that various modi?cations may
of providing a cooling tower and a storage tank and re
the above disclosed method and apparatus 45 frigerating means connected-t0 said tower and said tank,
for chilling printed webs without departing from the spirit
circulating a portion of the coolant in said tower and said
ofthis invention, particularlyas defined in the following
tank through said ?rst rolls and circulating another por»
claims.
tion of said coolant through said latter refrigerating
Iclaim:
means and the latter of said rolls.
50
1.i In an apparatus for providing printed material on
8; A method according to claim 6, wherein said coolant
continuouswebs including a printing press and a drier,
is water.
the improvement comprising means for cooling said web
9. In a method for cooling printed webs subsequent to
after exit from said drier, said cooling means including
printing and drying of said webs, the improvement com
a plurality of cooling rolls having internal coolant pas
prising providing a plurality of cooling rolls with inter
sages adapted to transport said webs, refrigerating means 55 nal coolant passages for cooling said webs immediately
connected to at least one ‘of the last cooling rolls over
after said drying, said cooling rolls including at least one
which said web is to be transported, said refrigerating
?rst unrefrigerated roll and at least one following re
means being adapted to. circulate refrigerated coolant
frigerated roll, transporting a printed’ and dried web over
through the passages in said' last rolls, means for holding
successive ones of said rolls, circulating unrefrigerated
unrefrigerated coolant and means for" circulating said
coolant
through the passages in the ?rst unrefrigerated
unrefrigerated coolant between said holding means and
rolls as they are contacted by said webs after drying, and
through thepassages of the other of said cooling rolls.
circulating refrigerated coolant through the passages in
2. An apparatus according to. claim 1, wherein said
the following refrigerated rolls as the webs pass thereover.
means for holding unrefrigerated coolant includes a cool
ing tower and a storage tank and said'refrigerating means
References Cited in the ?le of this patent
is connected to. said tower and tank'whereby a portion
of the-coolant from said tower and tank is passed to said
UNITED STATES P-AT ENTS
refrigerating means and through said last roll and another
2,131,257
Risley _______________ __ Sept. 27, 1938
portion of the coolant from said tower and tank is passed
70 2,365,352
through said other rolls.
Mof?tt ______________ __ Dec. 19, 1944
3. An apparatus according to claim 2, wherein said
2,.661,669
Friedrich _____________ __ Dec. 8, 1953
circulatingsystemis adapted to by-pass said refrigerating
2,858,677
Stone __ __________ __,____ Nov. 4, 1958
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