Improvements in or connected with Machinery or Apparatus for Lifting Off at Intervals the Material to be Dried from Heated Drying Cylinders.
Year: 1896

page_text: Date of Application, 3rd Mar., 1896-Accepted, 4th Apr., 1896
COMPLETE SPECIFICATION.
Improvements in or connected with Machinery or Apparatus for
Lifting Off at Intervals the Material to be Dried from Heated
Drying Cylinders.
We, GUSTAV JAGENBURG, and RUDOLF JAGENBURG both of Rydboholm,
Sweden, Dyers, do hereby declare the nature of this favention, and in what
manner the same is to be performed to be particularly described and ascertained
in, and by the following statement, that is to say :-
This invention relates to improvements in, or connected with machinery or
drying apparatus, with heated drying drums, around which is conducted the material
to be dried, delivered from cloth-printing, dressing, impregnating, dyeing, or
washing machines.
In such drying apparatus or machinery, it frequently occurs, that they must be
stopped for a time, and the article to be dried then remains stationary also,
consequently those parts of the material which are in contact with the hot
drying cylinders, are dried to an excessive degree, whereby their strength, or it
may be, the mordants or dyes thereon are impaired or damaged.
Attempts have been made to obviate this disadvantage, by shutting off the
supply of steam to the drying cylinders during the period of stoppage of the
machine, but this procedure takes a considerable time, before the cylinders have
cooled down sufficiently to prevent injury to the article, from the heat received
fron the said cylinders.
Then again, before working can be resumed, it is necessary to wait until the
cylinders have become heated again, to a sufficient degree; this again occupies
time, and also has an injurious effect upon the material, or materials passing over
the rollers.
In particular, great damage results thereby to the quality of such goods as are
printed, dressed, impregnated, or dyed with colours that require to be mixed with
a solution of a metallic salt, or with other substances, for the purpose of producing
such colours, or of fixing the same upon the fibre.
Furthermore, the expensive endless carrying bands of cloth-printing machines,
that is to say, the felting or sheets of felt serving as a backing or support, for
the fabric to be printed, are also soon rendered useless by prolonged contact
with the hot drying cylinders. On leaving the printing machine, these bands
pass through a washing machine, and thence around drying cylinders, whence
they pass back again to the printing machine. In spite of the most careful
washing, a considerable quantity of colour becomes fixed, or held, in the interstices
of the said cloth, which colour, when the endless band is stationary (and this
happens at each stoppage of the printing machine, and consequently very
frequently) becomes decomposed by the action of the hot cylinders, and thereby
acts, in combination with the excessive action of the heat, to impair the durability,
or strength of the cloth.
This drawback i.e. the rottenness or friability of the carrying bands, or of the
fabrics, caused by the injurious action of the hot drying cylinders during the
stoppage of the machine, is now obviated by the use of the apparatus forming
the subject of this invention. This apparatus is characterized by the fact, that it
allows of the carrying band, or of the fabric, being removed from the drying
cylinders rapidly and easily, and of being replaced in contact with the said

page_text: cylinders; or in other words, it enables the drying cylinders to be uncovered or
freed from the material to be dried, and also to he covered again therewith when
desired.
In order that this invention may be readily understood we will describe same
with reference to Figs. 1 to 5 which illustrate several arrangements of apparatus.
Referring to Figure 1 it is assumed that the endless carrying band or cloth of
a cloth printing machine is required to be dried; a is the printing machine cylinder.
The endless carrying band or cloth 6 passing off from this cylinder a passes
over the guide rollers c, into the washing machine d, and thence around the
guide rollers e, to the guide rollers which are arranged at suitable distances
above one another. All these guide rollers/are mounted upon arms of a carriage g
which latter is guided at top and bottom on rails, in such a manner that said
carriage can be moved towards, or distanced from, the drying cylinders h.
When the earringe y is caused to assume the position shown in full lines in
Fig. 1, the printing cloth is raised away from the cylinders 4.
When the
carriage has been moved so far towards the rollers h, that the guide rollers are
located in the position shown in dotted lines, then the cylinders are covered, or
partially coverel, with the printing cloth.
In order to move the carriage g in and out in the proper manner, and to cause
the carrying baud or cloth to be slackened when the carriage runs in, and to be
stretched taut when the earringe runs out, the earringe g engages on each side, by
means of two horizontal fixed toothed racks i, with toothed wheels & and I. Both
the upper wheels k, and the lower wheels, are each mounted on a common shaft m
and respectively, extending transversely across the framing o. Each lower
wheel gears with its corresponding upper wheel k, through the medium of a
vertical toothed rack p, so that rotary motion of the lower shaft n rotates the upper
shaft in the same direction. The lower shaft n is rotated by means of a lever q
mounted thereon, which is weighted at its free end.
By moving this lever from the position shown in full lines, through 180°,
into the position shown in dotted lines, the carriage g is caused to run in, and the
carrying band or cluth 6 is caused to embrace the drying cylinders h. On moving
the lever y back again into its first position, as shewn in full lines, the carriage is
caused to run out, and the priuting cloth is distanced from the eylimlers 4. By
moving the lever y into an intermediate position, the carrying band or cloth
can be moved into contact with the drying cylinders in a lesser degree.
In this movement of the lever q, the toothed wheel rotates a toothed wheel r,
and consequently the toothed wheels, mounted together with the wheel on the
same shaft, and this wheels engages with a toothed rack t. The wheels r and s,
and the toothed rack t, are provided on both sides of the machine, and the two
toothed racks carry a stretching roller w, which, when the carriage g runs in, is
moved with the toothed racks t, upwardly, into the position shown in dotted lines,
so that the carrying band or cloth & can yield to the requisite extent. When the
carriage runs out, the stretching roller is lowered, and the cloth is thereby stretched
to the required extent.
From the stretching roller the carrying band or cloth passes around the
drawing roller e, and thence around the tensioning roller to and the guide rollers.
back to the printing machine cylinder a.
In the arrangement of apparatus, above described, only one side of the carrying
band or cloth or the fabric as the case may be, is brought into contact with the
drying cylinders. But in the arrangements of apparatus shown in Figs. 2 and 3,
(which differ from the first arrangement only by the fact that the carriage g, carries
one or more drying cylinders ), both sides of the carrying band or cloth, or of the
fabric, are brought into contact with, or pass between, the drying cylinders.
Instead of using a carriage and a stretching roller, the carrying band or cloth
may be placed around the drying cylinders and removed therefrom by means of
oscillating levers. An arrangement of this kind is illustrated by Figs. 4 and 5.
Between two drying cylinders there is mounted (parallel to them) a shaft 1,

page_text: which carries at each end a fixed bevel wheel 2, and a two-armed lever 3, 3, fixed
to the latter. The free ends of the lever 3, 3, situated at one end of the cylinder,
are connected by means of guide rollers 4, and guide bars 5, to the free ends of a
similar lever (not shown in Fig. 5) situated behind the other end of the cylinder. These
bars 5 are mounted on arms 6 (Fig. 4,) which project upwards from say the left
hand ends of the levers, and project downwards from say the right hand ends of the
levers. The two levers 3, 3, the two guide rollers 4, 4, and the two guide bars 5, 5,
constitute a frame which is capable of rotating with the shaft 1.
On the shaft I there is loosely mounted a somewhat shorter sleeve 7 (Fig. 5)
which also carries at each end a bevel toothed wheel 8, and two levers 9, 9 fixed
thereon in line with each other. The levers 9, 9 situated on one side, are, together
with those similarly directed, and situated on the other side, connected by means of
guide rollers 4, and guide bars 5, so as to constitute a frame adapted to rotate with
the sleeve 7, whilst each of the bevel wheels 8 of said frame is connected by means
of a bevel wheel 10 with the corresponding bevel wheel 2.
When the two frames assume the position shown in full lines in Fig. 4, the
course of the fabric to be dried is as follows;-The said fabric comes from above,
on the left hand, from a fixed guide roller 11, passes around the left hand guide
roller 4 of the frame 9, 9; then around the drying cylinder A; thence around the
left hand guide roller 4 of the frame 3, 3; and then downwards around the fixed
guide roller 12; then, further towards the right hand, around the fixed guide
roller 13, whence it passes around the right hand guide roller 4, of the frame 9, 9,
around the second drying cylinder 4, the right hand guide roller 4 of the frame 3, 3,
and the upper fixed guide roller 14. As shown, the fabric, in its course around
the guide rollers 4, passes through between these and the guide bars 5.1
If the shaft 1 be rotated by means of the handwheel 15, in the direction of the
arrow 16, the frame 3, 3 is moved in the same direction; whilst the frame 9, 9,
is moved in the opposite direction, as indicated by the arrow 17, by means of the
bevel gears 2, 10 and 8. The shaft 1 is rotated until the frames have moved
into the positions shown in dotted lines. By this means the endless carrying band,
cloth or the fabric is distanced from the drying cylinders A, and is caught and
stretched by the guide bars 5..
If the shaft I be then again rotated, but in the opposite direction to the arrow 16,
until the frames again assume the position shown in full lines, the carrying band
cloth or fabric is placed again around the drying cylinder.
If there is only one drying cylinder, then the arms 3, and 9, the guide rollers 4
and the guide bars 5, in Fig. 4, corresponding with the second drying cylinder, are
omitted.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is as follows-
1. Drying machinery or apparatus, for fabrics or the like, having one or more
heated drying cylinders; characterised by the fact that the fabric to be dried can
be moved away from the cylinders at will, and can be again brought into contact
with the cylinders, for the purpose of preventing excessive action of the heat upon
the fabric or the like during a stoppage of its travel, substantially as set forth.
2. The drying machinery or apparatus as specified in Claim 1, characterized by
the fabric or the like passing through the apparatus, between one or a series of
drying cylinders on one side, and one or a series of guide rollers or drying cylinders
on the other side, in such a manner that, by causing the two series to approach each
other, the fabric or the like is pressed against the drying cylinders; the arrangement
being such that one or more stretching rollers (capable of being moved up aud
down or to and fro) allow of the requisite yielding of the fabric, substantially as
described.
3. The drying machinery or apparatus as specified in Claim 1, characterized by
the fabric passing through the apparatus over two fixed guide rollers and between

page_text: guide bars of two frames capable of oscillating about a common axis, in such a
manner that said fabric, is caused, by the movement of the frames in opposite
directions, to be placed around, or else to be raised away from, a drying cylinder
which is situated between the fixed guide rollers, substantially as described.
Dated this 3rd day of March 1896.
BREWER & SON,
London and Leeds, Agents for the Applicants.