Note: Descriptions are shown in the official language in which they were submitted.
The present invention relates to a dyeing machine
of the jigger type, that is for open width treating and dyeing
f~b~ics, in which the jigger assembly is enclosed ln a
pressurized vessel provided with an envelope effective to
longitudinally slide with respect to the dyeing tub in such
a way as to facilitate access thereto and the servicing
thereof.
The known jigger dyeing machines substantially
compr.ise a dyeing tub thereabove thereabove there are :Located
a roller for feeding the fabric piece and a roller for taking
up said fabric, with the possibility of carrying out a reversed
operation, that is of causing the fabric to return from one
roller to the other, thereby perorming two or more passages
through the tub, suitable guiding, driving and controlling
means being provided for carrying out the mentioned operations.
In these machines the dyeing is carried out at atmospheric
pressure.
The development of new synthetic fibres makes it
advantageous to carry out the dyeing in a pressurized autoclave,
in such a way as to operate at a greater temperature and
accordingly with cJreater eficiency and shorter times. On
the other hand this is hindered by the fact that in the jigger
machine th.e loading and discharging of the fabric are carried
out transversely, thereby it is rather difficult to assemble
the jigger set in the inside of an autoclave or pressurized
vessel.
Thus, the main object of the present invention
is to eliminate the thereinabove mentioned drawback of the
known jigger dyeing machines~
According to -the present invention , this object
is essentially achieved by a dyeing machi.ne of the jigger
type comprising a dyeing tub provided wi-th overlying rollers
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for feeding and taking up the fabric to be dyed in said tub
bath, fabric guiding rollers, driving means for driving said
fabric feeding and taking up rollers, a pump, filters, ducts
and the like means for circulating the dyeing liquid, wherein
said tub is mounted with one end to a face of a vertically
extending fixed structure or frame forming the bottom of a
pressurized vessel, an envelope being provided encompassing
said tub and being effective to longitudinally slide on
inner and oute~ guides and to be tigh-t closed against said
fixed bottom in such a way as to form an autoclave and opened
by axially sliding away from said fixed bottom to allow for
said fabric to be loaded and discharged at said tub sides.
The machine of the invention is preferably
provided that the fabric piece , before entering
the tub bath and exiting therefrom~ is caused to pass between
a plurality of spraying nozzles, effective to further facilitate
the soaking and washing of the fabric.
The present invention will become more apparent from
the following description of an exemplary embodiment thereof
with reference to the accompanying drawing, where:
fig. 1 is a cross-section view illustrating the
dyeing machine according to the present invention;
fig. 2 is a partially sectioned side view thereof;
fig. 3 is a detail view illustrating a detail of
the assembly for slidingly driving the outer envelope of the
machine; and
fig. 4 is a perspective schematic view illustrating
the overall dyeing machine according to the invention.
With reference to the drawing figures, at 1 there
is indicated a cradle tub, therein is contained the dyeing
bath This tub is fixed to a suitably supported statio~àry
vertically extending structure or frame, indicated at 8,
--2--
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thereto there are associated and fitted all of the conventional
known members of a dyeing machine, such as motor, pump, filter
and the like, which will not be furt.her described herein.
Above the tub 1 the~e are mounted the known members forming
the higger type of d~eing assembly~ These members comprise
a roller 2 for feeding the fabric piece 5 and a roller 3 for
taking up said fabric, and a plurality of rollers 4 for guiding
the fabric 5. This latter, fed from the roller 2, by means
of suitable conventional fabric driving means, is caused to
pass on the rollers 4 and throuc~h the dyeing bath, and, finally
is taken up by the roller 3.
At the end of this operation or step, the rotation
directi.on is reversed, thereby the fahric 5 return from the
roller 3 to the roller 2 and again to the roller 3 for a number
of times set by a known apparatus (not shown) and passing
through the dyeing bath
It should be noted that the invention also provides
that the fabric, in addition to passing through the bath, is
also caused to pass between a provided plurality of spraying
nozzles, indicated at 6 and 7, effective to further facilitate
the soaking of the fabric itself.
According to the invention, it is provided that the
dyeing operation be carried out under pressure.
To this end the tub l is covered by a movable
envelope 9 which is mounted on wheels ll effective to slide
on outer rails lO. In the inside thereof said envelope 9 is
provided with guides or rails 15, engaging a pair of wheels
16 provided at one end of the tub 1, at the side opposite-to the
end member 8 . The opening and closing movement of -the
envelope 9 may be carried out by a manual pushing operation,
or by means of a geared motor 14 and a pinion-rack assembly,
as it is shown at 12 and 13. As it is shown, the envelope 9,
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as it is moved away from the bottom 8, provides free access
to the jigger assembly located in the tuh 1 which latter, in
the complete opening condition of the envelope or shell 9,
rests by its end wheels 16 on the envelope ralls 15.
Upon having loaded the fabric, the envelope 9 is
pushed to the closure position against the bottom 8, where the
closure is of tight type as ob-tained by rotating a ring 17,
provided with front coupling.
Then, after the closure of the assembly, the
jigger set is energized which carries out the dyeing operation
in the inside of the members 8 and 9 which, as it should be
apparent, form an autoclave of sort.
At the completi.on of the dyeing, in order to
transversely discharge the dyed fabric, i-t is sufficient to
rotate again ring 17 closing the bottom 8 and cause the
envelope or shell 9 to move away from said bo-ttom 8, in such
a way as to again obtain access to the inside of the tub 1
fro~ either side of this latter.
Obviously the invention is not limited by the
exemplary details thereinabove illustrated and/or described,
being susceptible to all the variations or equivalent arrange-
ments falling within the scope thereof.
