Title of Invention	"AN IMPROVED APPARATUS FOR USE IN A MULTISHED WARP WEAVING SYSTEM AND A PROCESS OF MULTISHED WARP WEAVING"
Abstract	This invention relates to an apparatus for use in a multished warp weaving system. The apparatus has a plurality of rolling bars connected with each other by means of a arcular links to form a pressure bar chain. Sprockets are provided at one side of the chain for supporting the chain. The chain is provided over a lamellar chain. The lamellar chain has a plurality of warp end separation plates connected with each other by means of the long pins. Guide rollers is provided for supporting the lamellar chain thereon. A pair of warp delivery rollers are provided at one side of the chain and a pair of take-up rollers is provided at the other end of the chains for effecting let off a take up action. Further this invention relates to a multished warp weaving. According to the process a plurality of ,vj parallel sheds isiformed simultaneously. Opening the shed throughout the warp width by uf pressing warp thread individually. The picks are inserted through each of the shed. The % ' pressure bar chain is raised partially. The picks are beaten up by moving the lamellar chain towards the fell of the cloth. The comb is moved one by one out of the warp after the fell of the cloth is struck. The comb is pushed one by one into the warp simultaneously and then reducing the warp tension for the next cycle of waving.

Title of Invention

"AN IMPROVED APPARATUS FOR USE IN A MULTISHED WARP WEAVING SYSTEM AND A PROCESS OF MULTISHED WARP WEAVING"

Abstract

This invention relates to an apparatus for use in a multished warp weaving system. The apparatus has a plurality of rolling bars connected with each other by means of a arcular links to form a pressure bar chain. Sprockets are provided at one side of the chain for supporting the chain. The chain is provided over a lamellar chain. The lamellar chain has a plurality of warp end separation plates connected with each other by means of the long pins. Guide rollers is provided for supporting the lamellar chain thereon. A pair of warp delivery rollers are provided at one side of the chain and a pair of take-up rollers is provided at the other end of the chains for effecting let off a take up action. Further this invention relates to a multished warp weaving. According to the process a plurality of ,vj parallel sheds isiformed simultaneously. Opening the shed throughout the warp width by uf pressing warp thread individually. The picks are inserted through each of the shed. The % ' pressure bar chain is raised partially. The picks are beaten up by moving the lamellar chain towards the fell of the cloth. The comb is moved one by one out of the warp after the fell of the cloth is struck. The comb is pushed one by one into the warp simultaneously and then reducing the warp tension for the next cycle of waving.

Full Text	This invention relates to an improved apparatus for use in a multisheci warp weaving system and a process thereof, Multished warp weaving systems are known in the prior art, one of the multisheci warp weaving system is called as weft way system in which a multiplicity of sheds move in the warp direction along a flat path. The pther system is called as curved warp wave system or rotor systems in which a multiplicity of sheds is moved in the warp direction along a covered path. The third system is known as flat warp way system wherein a multiplteitp of sheds are formed by conventional healds and j these sheds moved in the warp direction along a flat There are certain disadvantages associated with all these \ conventional weaving systems/devices. One of the main disadvantage is that none of these conventional systems gives higher productivity as compared to single phase looms of the air jet type, due to the reason that sheds are formed one by one (though a number of them exist in any given time) rather than a number of them formed in a batch. As these sheds are formed one after another the speed of the process cannot be faster that the speed of shedding which by itself cannot be very high due to the reciprocating nature of this operation. Another disadvantage is that a small weft carriers have to move in unison with slowly moved sheds and therefore reduces the productivity. Another disadvantage is that the sheds are formed one after another and therefore the speed of shedding is low and hence the productivity cannot he faster than the frequency of the same. Yet another disadvantage is that the cloth produced is skewed i.e. the warp and weft yarn are not at 90 °angle. Still another disadvantage is that of the incorporation of complicated weft rewinding system on the weaving system which reduces the speed of the loom. /'"' Yet another disadvantage is that the lamellar elements employed in the weaving system for shed formation causes excessive warp to rotor friction. Another disadvantage is that the weft supply packages and picking remain attached to the shed during its transfer to the fell to the cloth and thereby a large number of these systems are required though only some of them are working at a time. Still another disadvantage is that a complicated folding and unfolding lamellar structure is provided with the looms and which acts as a type for weft propulsion and retains the sheds during transit is required in the system. Another disadvantage is that weft supply package and weft supply system have to travel with the trave 11 incj sheds. Therefore the main object of the present invention is to provide an apparatus for use in a multished warp weaving system to increase the productivity thereof. Another object of this invention is to provide an improved weaving system which obviates the disadvantages associated with the prior art. Another object of this invention is to provide a weaving system having the means to facilitate the movement of the weft supply and picking system alongwith the sheds smoothly. A further object of this invention is to provide an improved process to minimise the harsh action of shed forming elements on warp. Another object of this invention is to provide an improved process wherein equal number of picks are simultaneously inserted through the formed sheds. According to this invention there is provided an improved apparatus for use in a multished warp weaving system characterised in that is plurality of rolling bars connected with each other by means of a arcular links to form a pressure bar chain, sprockets being provided at one side of said chain for supporting said chain, said chain being provided over a lamellar chain comprising a plurality of warp and separation plates connected with each other by means of the long pins, guide rollers being provided for supporting said lamellar chain thereon, a pair of warp delivery rollers being provided at one side of said chain and a pair of take-up rollers being provided at the other end of said chains for effecting let off a take up action. Further according to this invention there is provided a process of multished warp weaving characterised by the step of forming a plurality of parallel sheds simultaneously, opening said shed throughout the warp width by pressing warp thread individually, inserting the picks through each of said shed, raising the pressure bar chain partially, beating-up said picks by moving the lamellar chain towards the fell of the cloth, moving the comb one by one out of the warp after the fell of the cloth is struck, pushing the comb one by one into the warp simultaneously and then reducing the warp tension for the next cycle of weaving. In accordance with this invention the apparatus for use with the multished warp weaving system has rolling bars connected with each other by means of arcuiar links. The roll ing/pressure bars are provided at a predetermined distance between each other and are linked together by means of arcuiar links. This assembly constitute a pressure bar chain assembly and is supported on a plurality of sprockets. This assembly can be raised or lowered on the lamellar chain. The lamellar chain has warp end separation plates having shedding projections provided integrally therewith at a preselected sits and in accordance with the pattern of the weave desired to be woven. The warp end separation plate are of following kinds 1. the warp end separation plate having no projection 2. the warp end separation plate with projection only on right side, 3. the warp end separation plate having projection only on left side and 4. the warp end separation plate with projection on both the sides. These warp end separation plates are assembled to form lamellar chain in accordance with the weave pattern. Each warp end separation plate has a window provided between the shedding projection and a projected spite provided towards one end of the separation plates. The warp and separation plates are assembled such that to form a tubular path for the picking medium and the picks. The plurality of spite of warp end separation plate forms a comb for effecting the beating during the weaving process, The adjacent section (wrap end separation plate) of the lamellar chain are hinged together by means of long pins and the lamellar chain is supported on the guide rollers. This chain is adapted to roll towards the fell of the cloth and backward. The pressure bar chain is supported on a pair of rollers provided between either ends of the pressure chain. One pair of said rollers is provided to deliver extra warp during shedding and rotate backward to retruct wrap at the time of beat-up. The other pair of rollers are provided to effect let off and take-up action during the weaving process. Further in accordance with this invention following steps are followed during the weaving process:- 1. a number of parallel sheds are formed simultaneously and each one is open through out the warp width by pressing individual warp thread (under low tension) between profiled lamellar having number of raised portions interspersed with the straight portions in accordance with weave pattern form below and pressure bars from above. 2. equal number of picks are then inserted through each of the so formed sheds. 3, raising the pressure bar partially in conjunction with tightening the warp, thus resulting in reduction in shed opening. 4. beating up of each pick by moving the profiled lamellar chain which comprises beat-up combs towards the fell of the cloth. 5. moving the comb one by one out of the line of the warp after the fell of the cloth is struck by them to effect the beat—up of corresponding pick. 6. pushing the combs one by one into the warp simultaneously with the movement of the combs one by one out of the line of warp and then 7, reducing the warp tension to prepare it for the steps mentioned above for the next site. An apparatus for use in a multished warp weaving system and a process of multished warp weaving according to a preferred -embodiment is herein described and illustrated in the accompanying drawings wherein:-Fig. 1 shows the plan view of the device, Fig»2-~Fig,7 shows operational steps formed during the weaving process. Referring to the drawings particularly fig. 1 the apparatus for ise in roultished warp weaving system has a plurality of rolling bars 10 adapted to extend o/er the entire width of the warp. The ends of the r ill ing bars are secured with each other by means of arcular links 11 in order to constitute a pressure bar chain 2. The pressure bar chain 2 is supported on sprocket 12, The pressure bar chain 2 and sprocket 12 forms a pressure bar chain assembly adapted to be raised or lowered on to the lamellar chain 1 by a suitable raising and lowering mechanism. Pairs of warp delivery rollers 14 rotate forward to deliver extra warp during shedding and are adapted to rotate back to retract warp at the time of beat-up. Delivery rollers 14 in conjection with the take—up rollers 15 are also used to effect let off and take-up action during the weaving process. The pressure bar chain assembly 2 is provided over a lamellar chain assembly 1. The lamellar chain is made of fined sheet metal warp end separation plates 3 having shedding projections 4 embossed in them at preselected sits in accordance with the pattern of weave desired to be woven. These warp end separation plates 3 are of the following kind:- 1. the warp end separation plate having no projection 2. the? warp end separation plate with projection only on right side, 3. the warp end separation plate having projection only on left side and 4. the warp end separation plate with projection on both the sides. These warp end separation plates 3 are assembled to form the lamellar chain 1 in accordance with the weave pattern. Each plate 3 has a window portion 5 through which the picking operation take place. The portion between the shedding projection 4 and the projected spite 6 provided in the warp end separation plate constitutes the window 5. The adjacent end of the warp end separation plate 3 (as shown in fig.lA) are hinged together by means of a pin 7 to form a lamellar chain 1. The spite 6 forms a comb for effecting heat-up action during the weaving. The windows 5 of the warp end separation plate 3 form a channel which provides a tubular path for the picking medium and the pick. The pressure bar chain 2 can roll towards the? fell of the cloth 9 and backward. According to the process of this invention the rolling bars 10 of the pressure chain 2 are set at their top position and the warp is tensioned as shown in fig.2. All the warp ends are in one plane just touching top of upper shedding. During the next step of weaving the rolling bars 10 are brought to the lower most position and the sheds are fully opened as shown in fiq.3. The multiple picks as shown in fig.4 are then inserted simultaneously and are kept in face with each other, As shown in fig. 5 and when the picking is over the rolling bars 10 are moved in the intermediate position and the sheds are partially opened. At this position the beat—up step is started. During beating, and as shown in fig. 6 lamellar shedding chain 1 and pressure bar chain 2 starts moving towards fell of the cloth. As. shown in fig.7 the pressure bars are moved towards the top position and the beat—up action is completed and the apparatus is ready for the next cycle of weaving. According to the process of this invention and with the help of the shedding system employed multiple sheds are open and close simultaneously in one step,however, the frequency of shedding is allowed to be low without effecting the productivity. The shedding takes place at the time when the warp is very loose and therefore the warp receives a very gentle treatment and breaks are minimised. As sheds are open through out the width of the warp pick speed is maximised. The beat—up action is done in open shed and warp to pick friction dt3»s not come in picture to ensure gentle treatment of warp and weft during beat-up step. Further the warp are individually controlled during shedding therefore a very big weave pattern both warp on weft way is possible. I CLAIM; 1. An improved apparatus for use in a multishedkwran weaving system characterised in that is plurality of rolling bars connected with each other by means of a arcular links to form a pressure bar chain, sprockets being provided at one side of said chain for supporting said chain, said chain being provided over a lamellar chain comprising a plurality of wrap and separation plates connected with each other by means of the long pins, guide rollers being provided for supporting said lamellar chain thereon, a pair of warp delivery rollers being provided at one side of said chain and a pair of take-up rollers being provided at the other end of said chains for effecting let off a take up action. 2. An improved apparatus as claimed in claim 1, wherein said wrap end separation plate has a shedding projection embossed therewith at preselected sits in accordance with the pattern of the weave desired to be woven, a projected spite being provided at the opposite end of said wrap end separation plate in order to constitute a window therewith for effecting smooth insertion of picks during weaving. 3. A process of multishedjwrap Reaving comprising of step of forming a plurality of parallel sheds simultaneously, opening said shed throughout the wrap width by pressing warp thread individually, inserting the picks through each of said shed, raising the pressure bar chain partially, beating-up said picks by moving the lamellar chain towards the fell of the cloth, moving the comb one by one out of the warp after the fell of the cloth is struck, pushing the comb one by one into the wrap simultaneously and then reducing the wrap tension for the next cycle of weaving. An improved apparatus for use in a multished warp weaving system and a process thereof substantially as herein described and illustrated.

Full Text

This invention relates to an improved apparatus for use in a multisheci warp weaving system and a process thereof,
Multished warp weaving systems are known in the prior art, one of the multisheci warp weaving system is called as weft way system in which a multiplicity of sheds move in the warp direction along a flat path. The pther system is called as curved warp wave system or rotor systems in which a multiplicity of sheds is moved in the warp direction along a covered path. The third system is known as flat warp way system wherein a multiplteitp of sheds are formed by conventional healds and j these sheds moved in the warp direction along a flat
There are certain disadvantages associated with all these \ conventional weaving systems/devices. One of the main disadvantage is that none of these conventional systems gives higher productivity as compared to single phase looms of the air jet type, due to the reason that sheds are formed one by one (though a number of them exist in any given time) rather than a number of them formed in a batch. As these sheds are formed one after another the speed of the process cannot be faster that the speed of shedding which by itself cannot be very high due to the reciprocating nature of this operation.
Another disadvantage is that a small weft carriers have to move in unison with slowly moved sheds and therefore reduces the productivity.
Another disadvantage is that the sheds are formed one after another and therefore the speed of shedding is low and hence the productivity cannot he faster than the frequency of the same.
Yet another disadvantage is that the cloth produced is skewed i.e. the warp and weft yarn are not at 90 °angle.
Still another disadvantage is that of the incorporation of complicated weft rewinding system on the weaving system which reduces the speed of the loom.
/'"'
Yet another disadvantage is that the lamellar elements employed in the weaving system for shed formation causes excessive warp to rotor friction.
Another disadvantage is that the weft supply packages and picking remain attached to the shed during its transfer to the fell to the cloth and thereby a large number of these systems are required though only some of them are working at a time.
Still another disadvantage is that a complicated folding and unfolding lamellar structure is provided with the looms and which acts as a type for weft propulsion and retains the sheds during transit is required in the system.
Another disadvantage is that weft supply package and weft supply system have to travel with the trave 11 incj sheds.
Therefore the main object of the present invention is to provide an apparatus for use in a multished warp weaving system to increase the productivity thereof.
Another object of this invention is to provide an improved weaving system which obviates the disadvantages associated with the prior art.
Another object of this invention is to provide a weaving system having the means to facilitate the movement of the weft supply and picking system alongwith the sheds smoothly.
A further object of this invention is to provide an improved process to minimise the harsh action of shed forming elements on warp.
Another object of this invention is to provide an improved process wherein equal number of picks are simultaneously inserted through the formed sheds.
According to this invention there is provided an improved apparatus for use in a multished warp weaving system characterised in that is plurality of rolling bars connected with each other by means of a arcular links to form a pressure bar chain, sprockets being provided at one side of said chain for supporting said chain, said chain being provided over a lamellar chain comprising a plurality of warp and separation plates connected with each other by means of the long pins, guide rollers being provided for supporting said lamellar chain thereon, a pair of warp delivery rollers being provided at one side of said chain and a pair of take-up rollers being provided at the other end of said chains for effecting let off a take up action.
Further according to this invention there is provided a process of multished warp weaving characterised by the step of forming a plurality of parallel sheds simultaneously, opening said shed throughout the warp width by pressing warp thread individually, inserting the picks through each of said shed, raising the pressure bar chain partially, beating-up said picks by moving the lamellar chain towards the fell of the cloth, moving the comb one by one out of the warp after the fell of the cloth is struck, pushing the comb one by one into the warp simultaneously and then reducing the warp tension for the next cycle of weaving.

In accordance with this invention the
apparatus for use with the multished warp weaving system has rolling bars connected with each other by means of
arcuiar links. The roll ing/pressure bars are provided at a predetermined distance between each other and are
linked together by means of arcuiar links. This assembly constitute a pressure bar chain assembly and is
supported on a plurality of sprockets. This assembly can be raised or lowered on the lamellar chain. The
lamellar chain has warp end separation plates having shedding projections provided integrally therewith at a
preselected sits and in accordance with the pattern of the weave desired to be woven. The warp end separation
plate are of following kinds
1. the warp end separation plate having no projection 2. the warp end separation plate with projection only on right side,
3. the warp end separation plate having projection
only on left side and
4. the warp end separation plate with projection on
both the sides.
These warp end separation plates are assembled to form lamellar chain in accordance with the weave pattern.
Each warp end separation plate has a window provided between the shedding projection and a projected spite
provided towards one end of the separation plates. The

warp and separation plates are assembled such that to form a tubular path for the picking medium and the picks. The plurality of spite of warp end separation plate forms a comb for effecting the beating during the weaving process, The adjacent section (wrap end separation plate) of the lamellar chain are hinged together by means of long pins and the lamellar chain is supported on the guide rollers. This chain is adapted to roll towards the fell of the cloth and backward. The pressure bar chain is supported on a pair of rollers provided between either ends of the pressure chain. One pair of said rollers is provided to deliver extra warp during shedding and rotate backward to retruct wrap at the time of beat-up. The other pair of rollers are provided to effect let off and take-up action during the weaving process.
Further in accordance with this invention following steps are followed during the weaving process:-
1. a number of parallel sheds are formed simultaneously and each one is open through out the warp width by pressing individual warp thread (under low tension) between profiled lamellar having number of raised portions interspersed with the straight portions in accordance with weave pattern form below and pressure bars from above.
2. equal number of picks are then inserted through
each of the so formed sheds.
3, raising the pressure bar partially in conjunction
with tightening the warp, thus resulting in reduction in shed opening.
4. beating up of each pick by moving the profiled lamellar chain which comprises beat-up combs towards the fell of the cloth.
5. moving the comb one by one out of the line of the warp after the fell of the cloth is struck by them to effect the beat—up of corresponding pick. 6. pushing the combs one by one into the warp simultaneously with the movement of the combs one by one out of the line of warp and then
7, reducing the warp tension to prepare it for the steps mentioned above for the next site.
An apparatus for use in a multished warp weaving system and a process of multished warp weaving according to a preferred -embodiment is herein described and illustrated in the accompanying drawings wherein:-Fig. 1 shows the plan view of the device,
Fig»2-~Fig,7 shows operational steps formed during the weaving process.
Referring to the drawings particularly fig. 1
the apparatus for ise in roultished warp weaving system has a plurality of rolling bars 10 adapted to extend
o/er the entire width of the warp. The ends of the r ill ing bars are secured with each other by means of
arcular links 11 in order to constitute a pressure bar chain 2. The pressure bar chain 2 is supported on
sprocket 12, The pressure bar chain 2 and sprocket 12 forms a pressure bar chain assembly adapted to be raised
or lowered on to the lamellar chain 1 by a suitable raising and lowering mechanism. Pairs of warp delivery
rollers 14 rotate forward to deliver extra warp during shedding and are adapted to rotate back to retract warp
at the time of beat-up. Delivery rollers 14 in conjection with the take—up rollers 15 are also used to
effect let off and take-up action during the weaving process. The pressure bar chain assembly 2 is provided
over a lamellar chain assembly 1. The lamellar chain is made of fined sheet metal warp end separation plates 3
having shedding projections 4 embossed in them at preselected sits in accordance with the pattern of weave
desired to be woven. These warp end separation plates 3 are of the following kind:-
1. the warp end separation plate having no projection
2. the? warp end separation plate with projection only
on right side,
3. the warp end separation plate having projection
only on left side and
4. the warp end separation plate with projection on
both the sides.
These warp end separation plates 3 are
assembled to form the lamellar chain 1 in accordance with the weave pattern. Each plate 3 has a window
portion 5 through which the picking operation take place. The portion between the shedding projection 4
and the projected spite 6 provided in the warp end separation plate constitutes the window 5. The
adjacent end of the warp end separation plate 3 (as shown in fig.lA) are hinged together by means of a pin 7
to form a lamellar chain 1. The spite 6 forms a comb for effecting heat-up action during the weaving. The
windows 5 of the warp end separation plate 3 form a channel which provides a tubular path for the picking
medium and the pick. The pressure bar chain 2 can roll towards the? fell of the cloth 9 and backward.
According to the process of this invention the rolling bars 10 of the pressure chain 2 are set at
their top position and the warp is tensioned as shown in fig.2. All the warp ends are in one plane just touching
top of upper shedding. During the next step of weaving the rolling bars 10 are brought to the lower most
position and the sheds are fully opened as shown in fiq.3. The multiple picks as shown in fig.4 are then
inserted simultaneously and are kept in face with each other,
As shown in fig. 5 and when the picking is
over the rolling bars 10 are moved in the intermediate position and the sheds are partially opened. At this
position the beat—up step is started. During beating, and as shown in fig. 6 lamellar shedding chain 1 and
pressure bar chain 2 starts moving towards fell of the cloth. As. shown in fig.7 the pressure bars are moved
towards the top position and the beat—up action is completed and the apparatus is ready for the next cycle
of weaving.
According to the process of this invention
and with the help of the shedding system employed multiple sheds are open and close simultaneously in one
step,however, the frequency of shedding is allowed to be low without effecting the productivity. The shedding
takes place at the time when the warp is very loose and therefore the warp receives a very gentle treatment and
breaks are minimised. As sheds are open through out the width of the warp pick speed is maximised. The beat—up
action is done in open shed and warp to pick friction dt3»s not come in picture to ensure gentle treatment of
warp and weft during beat-up step. Further the warp are individually controlled during shedding therefore a very
big weave pattern both warp on weft way is possible.

I CLAIM;
1. An improved apparatus for use in a multishedkwran weaving system
characterised in that is plurality of rolling bars connected with each other by means of a arcular links to form a pressure bar chain, sprockets being provided at one side of said chain for supporting said chain, said chain being provided over a lamellar chain comprising a plurality of wrap and separation plates connected with each other by means of the long pins, guide rollers being provided for supporting said lamellar chain thereon, a pair of warp delivery rollers being provided at one side of said chain and a pair of take-up rollers being provided at the other end of said chains for effecting let off a take up action.
2. An improved apparatus as claimed in claim 1, wherein said wrap end
separation plate has a shedding projection embossed therewith at
preselected sits in accordance with the pattern of the weave desired to
be woven, a projected spite being provided at the opposite end of said
wrap end separation plate in order to constitute a window therewith
for effecting smooth insertion of picks during weaving.
3. A process of multishedjwrap Reaving comprising of step of forming a
plurality of parallel sheds simultaneously, opening said shed
throughout the wrap width by pressing warp thread individually,
inserting the picks through each of said shed, raising the pressure
bar chain partially, beating-up said picks by moving the lamellar
chain towards the fell of the cloth, moving the comb one by one out of
the warp after the fell of the cloth is struck, pushing the comb one by one into the wrap simultaneously and then reducing the wrap tension for the next cycle of weaving.
An improved apparatus for use in a multished warp weaving system and a process thereof substantially as herein described and illustrated.

Documents:

06-del-2000-abstract.pdf

06-del-2000-claims.pdf

06-del-2000-correspondence-others.pdf

06-del-2000-correspondence-po.pdf

06-del-2000-description (complete).pdf

06-del-2000-drawings.pdf

06-del-2000-form-1.pdf

06-del-2000-form-19.pdf

06-del-2000-form-2.pdf

06-del-2000-form-3.pdf

06-del-2000-gpa.pdf

« Previous Patent

Next Patent »

Patent Number

217565

Indian Patent Application Number

06/DEL/2000

PG Journal Number

15/2008

Publication Date

11-Apr-2008

Grant Date

27-Mar-2008

Date of Filing

05-Jan-2000

Name of Patentee

MRS. PURNIMA SAXENA

Applicant Address

3/33,PREM NAGAR, HEALTH CENTRE,DAYALBAGH, AGRA-282 005

Inventors:

#	Inventor's Name	Inventor's Address
1	MRS. PURNIMA SAXENA	3/33,PREM NAGAR, HEALTH CENTRE,DAYALBAGH, AGRA-282 005

PCT International Classification Number

D03D47/30

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA