Technical field
This invention relates to faller bar assembly used in jute drawing process. This invention
particularly relates to faller bars used in draw frames employed for processing jute fibres.
Background art
The draw frame also sometimes referred to as "Gillboxes" or "pin drafters" and are used in the
primary processing of long staple yarn manufacture. In the jute drawing machine the random
loose fibres are formed into a ribbon-like form known as "sliver" and delivered in to sliver cans .
The slivers accumulated in sliver cans in one stage of drawing are fed to the subsequent stage
of draw frame for further processing .
The draw frame fulfils the function of opening, straightening and parallelizing the fibres present
in the sliver to ensure that a uniform and level product is supplied to the spinning frame which
produces the final yam. In the draw frame the fibre material is subjected to drafting The drafting
arrangement normally comprises 4 pairs of rollers and corresponding pressing rollers namely
rear and front back rollers, front roller and delivery rollers. The spacing between the inlet and the
middle drafting rollers ie the front roller forms the main drafting zone where as the spacing
between the middle drafting rollers and the delivery rollers works with a nominal lead only. The
fiber material in the main drafting zone is also drafted out by the use of moving faller bars. The
faller bar is subjected to longitudinal translatory motion in a direction transverse to its own length
during which its pins comb out the fibres of the sliver. The pins of the faller bars provide all
around support during drafting to reduce irregularity.
The faller bar has an internal body. Essentially, this portion comprises a long central pin carrying
zone, normally of rectangular cross-section on which a double row of pins or a single row of pins,
depending on the stage of drawing / are arranged upstanding from its top face. The end portions
are formed with inclined faces for engagement inside the helical grooves of screws. It is by the
rotation of the faller screws that the faller bars traverse through the machine according to rotating
screw and non rotating nut principle. Further detail of configuration of the end portions are not
described here, since these are conventional and do not form part of the invention.

During the operation of the machine the pins of the faller bars on the forward journey pierce the
web from below and transport the same at certain speed and the web gets pulled out by the
drafting rollers at a higher speed than the traveling speed of the needles of the faller bars in
accordance with the draft factor. It is well known that during operation the faller bars are
subjected to substantial shock loads and reactive forces . The central portion of the bars which
carry the pins embedded into the fibre are subjected to maximum transverse bending moment
also. Again higher the speed of operation , higher is the abrasion and wear and tear suffered by
the screws, slides .cams and check springs due to vigorous rubbing with the end portions of the
faller bar usually called the faller head .This assumes alarming level and completely destroys the
screw cams etc in very shorter period of time, if the head is metallic as in conventional faller
bar. This is one of the the main constraint in way of increasing drawing speed.
Faller bars from molded or cast plastic material with the root of the pins / needles/spikes
embedded in it is known in the art. But these type of faller bars are not sufficiently rigid. The drag
exerted by the fibrous material often deform the faller bars due to transverse bending moment
already mentioned which result in increased friction between the end portions (faller heads) of
the faller bar and the screw grooves which is provided for the driving of the faller bar. More over
if the faller bar is made from plastic material, static electricity will be formed when the fibrous
material contact faller bar and the fibrous material will be attracted to the faller bar resulting in
the accumulation of the fibres at the pins / needles/spikes of the faller bars . over come the
above problem the faller bar need to be exchanged often , which is expensive.
Object of the invention
It is an object of the present invention to provide a faller bar which will minimize the effect of
wearing out of the slides, cams and check springs resulting in the enhanced life cycle of the
machine.
It is an another object of the present invention to provide a faller bar which will minimize the
power requirement for the transport of the faller bar.
It is yet another object of the present invention to provide a faller bar which will reduce the noise.

Still another object of the present Invention to provide a faller bar which will have scope for
increasing the speed thereby productivity of the machine.
Accordingly this invention provides a faller bar assembly for jute processing comprises the
falter bar having a long central body carrying at least a row of opening element such as pins /
needles/spikes and ends disposed for engagement with the mechanism that provides the
longitudinal translatory motion to the falter bar assembly in a direction transverse to its length
characterized in that the falter bar assembly comprises falter bar having a long central body
and head portions wherein the falter bar is made of synthetic material and the central body
of the falter bar is housed within the holder .
Brief description of the drawings
Figure 1 of the drawing depicts the falter bar assembly according to this invention.
Figure 2 of the drawing depicts the plan view of the falter bar according to this invention.
Figure 3 of the drawing depicts the front view of the falter bar according to this invention.
Figure 4 of the drawing depicts the plan view of the holder according to this invention .
Figure 5 of the drawing depicts the front view of the holder according to this invention.
Description of the invention
Referring to the figures 1,2 and 3 of the drawings, the falter bar assembly comprises falter bar
(1) and holder (2). The faller bar comprises a long central body (1a) , normally of rectangular
cross-section on which a single row of opening elements (not shown- only the fixing holes are
shown) such as pins / needtes/spikes are rigidly fixed in any of the known methods such that
pins / needles/spikes are upstanding from its top edge. The falter bar (1) also comprises end
portions (1b, 1b'). The end portions (1b, 1b') are formed to the required shape and dimensions
according to the configuration of the drive member .The falter bar (1) is made of synthetic
material such as glass fibre reinforced nylon impregnated with molybdenum disulphide, ultra
high molecular weight polyethylene which posses the properties of high wear resistance and
resistance to deformation. The faller bar (1) may be economically manufactured by injection
molding process. Since the faller bar, particularly the end portions (1b, 1b') of the falter bar (1)

is made of synthetic material, it doesn't cause wear to the drive member, during transmission
of motion. Since the faller bar (1) is made of synthetic material, it weighs lighter resulting in
lesser power requirement for its movement.
Referring to fig 1, 4 and 5 of the drawings the faller bar assembly comprises a holder (2). In
order to enhance the stiffness of the faller bar (1) against bending the holder (2) is provided ,
which houses the failer bar (1) . The holder (2) is made of metallic material in the form of'U'.
The holder (2) encloses only the central body (1a) and the head portions (1b, 1b') are
uncovered by it. The holder (2) may be advantageously made of sheet metal, such as stainless
steel. The holder (2) also minimizes the accumulation / sticking of the fiber material over the
surface of the failer bar (1) especially the accumulation of the fibres at the pins /
needles/spikes of the failer bars due to static electricity which is formed due to the contact of the
fibrous material with the failer bar (1) which is made of synthetic material. The failer bar (1) and
the holder (2) are made integral by any one of the known methods , for example by riveting .
In one of the embodiments according to the invention the failer bar assembly comprises the
end portions which are made as separate part of the failer bar. The falter bar assembly
comprises a long central body embedded with opening elements , the end portions and the
holder . The central body may be made economically using low cost synthetic material such
as Polyvinyl chloride , High density polyethylene . The end portions are made of synthetic
material which posses high wear resistance properties and resistance to deformation such as
glass fibre reinforced nylon impregnated with molybdenum disulphide, ultra high molecular
weight polyethylene. The central body and the end portions may be economically
manufactured by injection molding process. The holder (2) is made of metallic material in the
form of U' and houses the falter bar and part of the head portions . The central body
.holder and the end portions are made integral by any one of the known methods, for
example by riveting . The part of the end portions which engages with the drive member is
totally un covered by the holder.

Advantages of the invention
Since the end portions of the faller bar is made of synthetic material, it doesn't cause wear to
the drive member, during transmission of motion. This results in the enhanced service life of
the faller bar assembly.
Since the end portions of the faller bar assembly is made of synthetic material, the metal to
metal contact between the faller bar and the screw grooves / worm or other mechanism which is
provided for the driving of the faller bar is eliminated. This facilitates reduction in the noise level
and it is possible to enhance the working speed of the faller bar assembly .thereby increased
productivity of the machine.
Since faller bar assembly is of light weight in construction , it is possible to minimize the power
requirement of the drive system which transport the faller bar assembly.
Though this invention is hereinbefore described and illustrated with reference to specific
embodiments, obvious alterations and modifications known to persons skilled in the art are well
within the scope of the appended claims.

WE CLAIM
1. Falter bar assembly for jute processing comprises the falter bar having a long central
body carrying at least a row of opening element such as pins / needles/spikes and
ends disposed for engagement with the mechanism that provides the longitudinal
translatory motion to the faller bar assembly in a direction transverse to its length
characterized in that the faller bar assembly comprises faller bar (1 ) having a long
central body (1a ) and head portions (1b, 1b') wherein the faller bar (1) is made of
synthetic material and the central body (1a) of the faller bar is housed within the
holder (2) .
2. Faller bar assembly for jute processing as claimed in claim 1 , wherein material for the
faller bar (1) is selected from glass fibre reinforced nylon impregnated with
molybdenum disulphide, ultra high molecular weight polyethylene.
3. Faller bar assembly for jute processing as claimed in claim 1, wherein the holder (2)
is made of metallic material.
4. Faller bar assembly for jute processing as claimed in claim 1 and 3 , wherein the
holder (2) is made of sheet metal, preferably stainless steel.
5. Faller bar assembly for jute processing as claimed in claim 1, wherein the faller bar (1)
is of three piece construction comprising a central body and two head portions.
6. Faller bar assembly for jute processing as claimed in claim 1 and 5 , wherein the
material for the head portions is selected from glass fibre reinforced nylon
impregnated with molybdenum disulphide, ultra high molecular weight polyethylene.

7. Faller bar assembly for jute processing as claimed in claim 1 and 5 , wherein the
material for the central body is selected from Polyvinyl chloride , High density
polyethylene
8. Faller bar assembly for jute processing substantially described with reference to fig 1
to 5 of the drawings accompanying this specification.

This invention relates to taller bar assembly used in textile machinery, particularly for Jute Processing machinery. The taller bar is made of synthetic material and housed in a metallic holder (2). The holder encloses only the central body of the faller bar and the head portions (1b, 1b') which engages with the drive member are un covered by the holder (2).