Apparatus for supplying a definite amount of a treating liquid to a textile product continuously

An apparatus for supplying a definite amount of a treating liquid to a textile product continuously, including a liquid retaining roll having a fine uneven surface or closely spaced small holes all over its surface to retain a treating liquid on the surface thereof, a device to supply a treating liquid to the liquid retaining roll by eliminating the flock and hards of the textile product and other dust adhering thereon, a doctor roll in contact with the liquid retaining roll to control the treating liquid adhering to the liquid retaining roll to a definite amount by pressing, a rubber roll to guide a textile product to be treated continuously, the rubber roll being in pressure contact with the said liquid retaining roll by putting the textile product therebetween to transfer a prescribed amount of the treating liquid to the textile product, and a device to clean the surface of the rubber roll by utilizing a circulated part of the said treating liquid.

The present invention relates to an apparatus for supplying a definite 
amount of a liquid to a textile product, with which a textile product such 
as a cloth, a belt to a yarn can be impregnated continuously with a 
definite amount of a liquid such as a dye solution. 
To impregnate, for instance, a cloth with a dye solution for dyeing or a 
resin solution for resin-treating, it has been a conventional practice to 
immerse a cloth to be treated in a liquid tank containing a treating 
solution, to take out the immersed cloth from the tank, to press the cloth 
with a press roll strongly to remove the excess of the liquid from the 
cloth and to transfer the cloth for further treatments. In using such a 
press roll, however, it is very difficult to render a liquid contained in 
a cloth after pressing to a prescribed amount precisely, and moreover, it 
is impossible to render the amount to less than 60%. 
A process and an apparatus for supplying a definite amount of liquid 
precisely to a textile product to be treated has been proposed by the 
present applicants, in which a prescribed amount (for instance, less than 
30%) of a treating liquid can be applied precisely and uniformly to a 
textile product to be treated. The process comprises coating the surface 
of a mesh roll having small holes in close spacings or a roulette roll 
having numerous fine roulette-type unevennesses with a liquid, removing 
the excess of the liquid adhered on the surface of the mesh roll or the 
roulette roll with the use of a knife-type doctor composed of rubber, a 
resin or a metal so as to control the liquid adhering on the surface of 
the said roll to a prescribed amount and then transferring the definite 
amount of the liquid thus adhered on the surface of the roll to a textile 
product to be treated by contacting the textile product with the roll. 
This prior art has, however, such drawbacks that, since the surface of the 
mesh roll or the roulette roll, on which the cloth is to be contacted, is 
always in pressure contact with a knife-type doctor composed of rubber, a 
resin or a metal, flock and hards of the textile product and other dust 
are bitten in between the roll and the doctor causing non-uniform adhesion 
of the liquid around the roll and damage of the roll surface. Further, 
since the roll the doctor are abrased in a long run operation, they must 
be repaired or exchanged periodically. 
Accordingly, the present invention is to offer an apparatus for supplying a 
definite amount of a treating liquid to a textile product, in which a 
definite amount of the liquid can be applied on the surface of a mesh roll 
or a roulette roll without the use of a knife-type doctor by eliminating 
the accumulation of flocks and hards of the textile product and other dust 
.

In FIG. 1, 1 is a textile product to be impregnated with a dye solution or 
a resin solution, 2 is a rubber roll to guide the textile product to be 
treated. The rubber roll 2 is supported rotatably with a pair of mangle 
frames 3 provided on the left and the right sides thereof, and is driven 
by means of a motor (not shown in the figure) in the direction of the 
arrow. 4 is a liquid retaining roll comprising a mesh roll having small 
holes in close spacings or a roulette roll having numerous roulette-type 
unevenness in pressure contact with the textile product 1 guided by the 
rubber roll 2, the contact pressure between the liquid retaining roll 4 
and the textile product 1 being controllable by a pressure controlling 
device 5. 
6 is a liquid tank to store a treating liquid 8. The liquid flows down 
therefrom at a uniform rate and is charged into a liquid reserving vessel 
or container 7. As shown in FIGS. 2 and 3, the liquid reserving vessel 7 
is broader than the liquid retaining roll 4 in its width so that a part of 
the liquid retaining roll is positioned in the interior of the liquid 
reserving vessel, and further, a part of the liquid retaining roll is in 
contact with the treating liquid 8. 
The liquid reserving vessel 7 is inclined so that a part of the liquid 
introduced therein flows out positively from the gaps (r) provided between 
both sides of the liquid reserving vessel 7 and corresponding sides of the 
liquid retaining roll 4 to wash away flock and hards of the textile 
product and other dust adhering to the surface of the liquid retaining 
roll 4. The inclination of the liquid reserving vessel can be controlled 
optionally by means of a counterweight 9. 10 is a doctor roll provided in 
to pressure contact with the liquid retaining roll 4 to which the liquid 
has been supplied from the liquid reserving vessel, and the contact 
pressure between the doctor roll 10 and the liquid retaining roll 4 can be 
controlled by a pressure controlling device 11. 
FIG. 5 shows the details of the cleaning mechanism for the rubber roll 2. 
12 is a brush roll in contact with a part of the rubber roll 2 at a 
position where the cloth to be treated is not in contact with the rubber 
roll, and this brush roll 12 brushes the surface of the rubber roll 2 to 
remove flock and hards of the textile product and other dust adhered 
thereon. Following the brushing roll 12 is a liquid jetting nozzle 15 for 
cleaning the rubber roll 2 and the brush roll 12 by jetting a washing 
liquid therefrom, and a part of the treating liquid flowing down from the 
liquid reserving vessel 7 is utilized as the washing liquid in order to 
avoid the contamination with foreign liquid of the textile product being 
treated. 13 is a press roll in contact with the rubber roll 2 for the 
purpose to mop the washing liquid on the surface thereof. The contact 
pressure between the press roll 13 and the rubber roll 2 can be controlled 
by a contact pressure controlling device 14 in FIG. 1. 19 is a spout to 
collect the jetted washing liquid. 
16 is a liquid receiving dish to receive the treating liquid flowing down 
from the washing liquid jetting nozzle 15 and overflowing from the liquid 
reserving vessel 7, and the liquid received in the liquid receiving dish 
16 is filtered through a filter 17 and circulated to the liquid tank 6 and 
the washing liquid jetting nozzle 15 with the aid of a pump 18. The 
circulation system of the treating liquid can be seen in FIG. 4. 
The process for supplying a definite amount of a treating liquid to a 
textile product by using the present inventive apparatus will now be 
explained in the following. The rubber roll 2 is driven in the direction 
of the arrow to transport the textile product to be treated 1 
continuously. On the other hand, the treating liquid 8 is charged from the 
liquid tank 6 to the liquid reserving vessel 7 successively at a uniform 
rate, and the liquid is adhered on the surface of the liquid retaining 
roll 4 in the liquid reserving vessel 7, while a part of the liquid flows 
out positively from the vessel 7 to the liquid receiving dish 16 through 
the gaps (r). In the meanwhile, the surface of the liquid retaining roll 4 
is washed with the liquid in the liquid reserving vessel 7, and flock and 
hards of the textile product and other dust adhering on the surface of the 
liquid retaining roll 4 are washed away with the liquid flowing out from 
the vessel 7 down to the liquid receiving dish 16. The liquid retaining 
roll 4 having no dirt adhering thereon is pressed in contact with the 
doctor roll 10 to control the treating liquid retained thereon to a 
prescribed amount. Then, the prescribed amount of the treating liquid is 
transferred through the rubber roll 2 to the cloth to be treated. 
On the other hand, while flock and hards and other dust are also adhered on 
the rubber roll 2 guiding the textile product to be treated 1, these dirts 
are removed with the aid of the brush roll 12 and the washing liquid from 
the liquid jetting nozzle 15 to clean the rubber roll. The rubber roll 2 
is then mopped with the press roll 13. The treating liquid flowing down 
from the liquid reserving vessel 7 and the spout 19 are collected en bloc 
in the liquid receiving dish 16, filtered through the filter 17 to remove 
the dirt and circulated to the liquid tank 6 and the liquid jetting nozzle 
15. 
In the present invention, as above explained, there is no danger that dirt 
adheres on the surface of the liquid retaining roll 4 as well as on the 
surface of the rubber roll 2, so that a definite prescribed amount of the 
treating liquid can be supplied precisely and uniformly to the textile 
product to be treated. Furthermore, since no knife-type doctor is used, 
the abrasion and damage of the liquid retaining roll surface as well as 
the doctor can be eliminated, and accordingly the life of the apparatus 
can effectively be prolonged.