FIELD OF THE INVENTION

The present invention generally relates to textile spinning preparatory machines. Particularly, the present invention relates to a device for cutting textile lap in a textile lap forming machine.

DESCRIPTION OF PRIOR ART

In textile spinning, a textile lap forming machine is one of the main discrete machine, wherein lap or roll of textile fibrous material In silver or web formation is wound upon a lap spool or bobbin for further processing in a combing machine. For example, drafted slivers withdrawn from sliver cans are delivered by means of different transport or conveying rollers, drafting arrangements, and a set of calender rollers to the lap spool. The lap being delivered from the calender rollers is wound on the lap spool due to the frictional contact of the lap rollers. Further, soon after the lap spool Is wound with the pre-determined length, the lap forming machine has to be stopped, wherein the lap has to be cut and the separated/cut lap has to be moved forward to the lap lifter assembly, which Is then fed to the combing machine. Conventionally, said lap cutting/tearing/doffing operation in textile lap forming machines is performed as described below.

The prior art system employs a common driving motor which drives the conveying rollers, drafting arrangement, calender rollers and lap rollers in the textile lap forming machines. Further, the drive from the common driving motor Is stopped during lap cutting. Subsequently, a clutch which is arranged between the main calender roller and the lap rollers is disengaged and a separate auxiliary motor associated with free wheel is connected to the lap rollers and energized to drive only the lap rollers to stretch the lap sheet, thereby tearing/cutting/doffing lap.

However, the prior art system employs clutch and free wheel which requires more maintenance and also uneconomical. Further, the auxiliary motor has to rotate the lap rollers alone when the lap forming machine Is stopped. Therefore, there is a need for an efficient and economical device for cutting the lap in the textile lap forming machine.

SUMMARY OF THE INVENTION

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed invention. This summary is not an extensive overview, and it is not intended to identify key/critical elements or to delineate the scope thereof. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

The primary object of the present invention is to provide an efficient and economical lap cutting device in a textile lap forming machine.

Accordingly the present Invention relates to a textile lap cutting device in a lap forming machine including a set of lap rollers and a plurality of calender rollers rotated in a direction to wind a lap sheet on a lap spool; said lap spool being held between lap discs wherein means are provided to rotate the wound lap in order to cut the lap sheet.

Accordingly the present invention relates to a textile lap cutting device in a lap forming machine wherein the wound lap is rotated by contact means in order to cut the lap sheet. The contact means is preferably a roller made of soft material such as synthetic rubber.

Accordingly the present invention relates to a secondary drive unit wherein the secondary drive unit includes an auxiliary motor; a shaft coaxially arranged and rigidly fitted to an output shaft of the auxiliary motor; a drive pulley rotatably mounted on the shaft; a lever having one end pivotally mounted on the shaft and the other end is provided with a roller; a pressing roller extends through the entire width of the lap; an arm provided to carry the pressing roller and actuating means, wherein one actuating means facilitates selective engagement and/or disengagement of the roller on periphery of at least one of the lap discs and the other actuating means facilitates selective engagement and/or disengagement of the pressing roller on periphery of the wound lap.

In one aspect, the present invention describes a method of textile lap cutting using a textile lap cutting device in a lap forming machine including steps of disengagement of drive to a set of lap rollers a plurality of calender rollers and lap feed when the predetermined length of lap is wound on the lap spool; lifting up of wound lap held between the lap discs away from the lap rollers and displacing near the roller; engagement of drive to the roller by auxiliary motor and actuating means, thereby facilitating selective engagement and/or disengagement of the roller on periphery of at least one of the lap discs; rotating the roller resulting in rotation of the lap discs by friction thereby cutting/tearing the lap; actuating means facilitating selective engagement and/or disengagement of the pressing roller on periphery of the wound lap and pressing of the cut end of the lap by the pressing roller to prevent unwinding of the wound lap from lap spool. The above method of lap cutting/tearing is controlled by a control unit with suitable algorithm/program.

The device disclosed herein may be implemented In any means for achieving various aspects. Other features will be apparent from the accompanying drawings and from the detailed description that follows.

BRIEF DESCRIPTION OF ACCOMPANYING FIGURES

Example embodiments are Illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements and In which:

Figure 1 is a schematic diagram of a lap cutting device in a textile lap forming machine in inoperative position, in accordance with the present invention.

Figure 2 is a schematic diagram of a lap cutting device in a textile lap forming machine in operative position, in accordance with the present invention.

Figure 3 is a schematic diagram illustrating a secondary drive unit of the textile lap cutting device, in accordance with the present Invention.

Figure 4 is a cross sectional view of section AA of Figure 2, in accordance with the present invention.

Other features of the present embodiments will be apparent from the accompanying drawings and from the detailed description that follows.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments of the present invention will now be explained with reference to the accompanying drawings. It should be understood however that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. The following description and drawings are not to be construed as limiting the invention and numerous specific details are described to provide a thorough understanding of the present invention, as the basis for the clams and as a basis for teaching one skilled in the art about making and/or using the invention. However in certain instances, well-known or conventional details are not described in order not to unnecessarily obscure the present invention in detail.

The present invention describes an efficient lap cutting device in a textile lap forming machine. A plurality of sliver from the sliver cans arranged in the creel member of the lap forming machine is drafted in the drafting arrangements and lap sheets are produced, which are then fed to the combing machine. The present invention provides a device to cut/doff/tear the textile lap to a pre-determined length by eliminating the usage of clutch and free wheel as employed in conventional systems. The term 'lap' and 'textile lap' are used interchangeably throughout the document. Also, the words 'cutting', 'tearing' and 'doffing' are used interchangeably throughout the document.

Figure 1 is a schematic diagram of a lap cutting device (100) in a textile lap forming machine in inoperative position, in accordance with the present invention. Particularly, the lap cutting device (100) Includes a set of lap rollers (102a, 102b), a plurality of calender rollers (104) (104a, 104b, 104c, 104d), an empty lap spool (106), a driving motor and a secondary drive unit (108), which are coupled as shown in Figure 1. The operation of Figure 1 is illustrated in Figure 2.

Figure 2 is a schematic diagram of a lap cutting device (100) in a textile lap forming machine in operative position, in accordance with the present invention. In operation, the lap rollers (102a, 102b) are rotated in the directions of the arrow as shown in Figure
2. The lap sheet (110) acts as a feed, which is fed as shown by the direction in Figure 2. The said lap sheet (110) is compacted by its passage through the calender rollers (104). Further, the compacted lap sheet is wound on the empty lap spool (106) which is held in between the lap discs (112a, 112b), Furthermore, a driving motor transmits the rotary motion to the lap rollers (102a, 102b) and the calender rollers (104) through various driving elements such as gears and belts which are known in the art. In one embodiment, the secondary drive unit (108) Is employed to cut/tear the lap sheet (110) and to separate the lap package from the running lap, The secondary drive unit (108) is illustrated in Figure 3 and the cross sectional view of section AA of Figure 2 is depicted in Figure 4.

Figure 3 is a schematic diagram illustrating a secondary drive unit (108) of the textile lap cutting device, In accordance with the present invention. Particularly, the secondary drive unit (108) includes an auxiliary motor (302), a shaft (304), a lever (306), a drive pulley (308), a roller (310), a transmission means (312), a tensioner pulley (314), an arm (316), a pressing roller (318), a support member (320), a set of actuating means (322a, 322b), which are coupled as shown in Figure 3, In one embodiment, the auxiliary motor (302) includes a reduction gear unit to reduce the power rating. Further, the shaft (304) is coaxially arranged and rigidly fitted to the output shaft of the auxiliary motor (302). The lever (306) Is disposed, one end of which is pivotally mounted on the shaft (304) and carries the drive pulley (308) which is also rotatably mounted on the shaft (304). In one example implementation, the roller (310) which is preferably made of soft material, for example synthetic rubber, is provided on the other end of the lever (306) and driven by the pulley (308).

In one example embodiment, the lever (306) carrying the drive pulley (308) and the roller (310) swivel about the axis of the shaft (304). Further, the transmission means (312) such as a toothed belt is provided to connect the drive pulley (308) and the pulley (308') to facilitate driving of the roller (310). Furthermore, a tensioner pulley (314) is employed to tension the toothed belt (312). In addition, the arm (316) is provided to carry a pressing roller (318) which extends to the entire width of the wound lap.

In one example implementation, one end of the arm (316) is pivoted to a support member (320) at pivot point (P1). One actuating means (322a) such as a pneumatic cylinder is disposed to selectively operate the lever (306) to facilitate the selective engagement and/or disengagement of the roller (310) on the periphery of at least one of the lap discs (112a, 112b). While one end of the actuating means (322a) is pivoted to the (ever (306) at pivot point (P2), the other end is pivoted to the support member (320) at pivot point (P3). Further, another actuating means (322b) such as a pneumatic cylinder is disposed for the selective engagement and/or disengagement of the pressing roller (318) on the periphery of the wound lap which is shown in Figure 2. One end of the actuating means (322b) is pivoted to the support member (320) at the pivot point (P4) and the other end is pivoted to the arm (316) at pivot point (P5).

In operation, soon after the pre-determined length of lap is wound on the lap spool (106), the drive to the calender rollers (104), lap rollers (102a, 102b) and the feed side is disengaged by the control system to facilitate cutting of the lap. The wound lap on the lap spool (106) held between the discs (112a, 112b) which are rotatably mounted on the respective loading arms is lifted upwards and displaced near the roller (310) by means of a control unit (not shown). The auxiliary motor (302) is switched ON and the roller (310) is driven. Subsequently the actuating means (322a) is actuated which causes the roller (310) to engage with the periphery of at least one of the lap discs (112a, 112b), The roller (310) provides frictional drive to the lap discs (112a. Il2b) by contact.

The wound lap held between the lap discs {112a, 112b) and the lap discs (112a, 112b) are revolved. Since the calender rollers (104) are held stationary and there is no lap feed, a stretch is introduced in the region between the calender rollers (104) and the wound lap resulting in cutting/tearing/doffing of the lap sheet (110).

Simultaneously, as shown in Figure 4, the actuating means (322b) is actuated which facilitates the swinging of the pressing roller (318) and causes the pressing roller (318) to engage with the periphery of the lap, resulting in pressing of the outer layer of the lap sheet wound on the lap spool (106). Thus facilitating the separated lap end to be pressed onto the lap spool (106) and held on the outer layer of the lap thereby preventing unwinding of the wound lap from lap spool at the time of lap cutting. This also minimizes the unwinding of the lap sheet during rolling out from the lap winding zone as well as during subsequent handling of the lap. The above method of lap cutting/tearing is controlled by a control unit with suitable algorithm/program.

In one example embodiment, the surface of the lap discs (112a, 112b) can be profiled like gear teeth. The contact means can be a gear wheel instead of roller. The profiled lap disc can be rotated by gear wheel contact thereby cutting the lap.

It is advantageous that the present invention provides a lap cutting device eliminating the usage of clutch and free wheel. The power rating of the auxiliary motor used for cutting/tearing/doffing the lap is considerably reduced by eliminating the requirement of driving the lap rollers for cutting/tearing/doffing the lap sheet.

Further, a pressing roller is provided to press the final layer of the lap sheet to minimize the unwinding of the lap sheet during cutting/tearing/doffing and loading in the combing machine, thus reducing the cutting/tearing/doffing time.

In general, it is clear that the present Invention and its advantages are not limited to the above described embodiments only. With minor modifications, substitutions and equivalents will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as described In the claims. Accordingly, the specification and figures are to be regarded as illustrative examples of the invention, rather than in restrictive sense.

The present invention generally relates to textile spinning preparatory machines. Particularly, the present invention relates to a device for cutting textile lap in a textile lap forming machine.

DESCRIPTION OF PRIOR ART

In textile spinning, a textile lap forming machine is one of the main discrete machine, wherein lap or roll of textile fibrous material In silver or web formation is wound upon a lap spool or bobbin for further processing in a combing machine. For example, drafted slivers withdrawn from sliver cans are delivered by means of different transport or conveying rollers, drafting arrangements, and a set of calender rollers to the lap spool. The lap being delivered from the calender rollers is wound on the lap spool due to the frictional contact of the lap rollers. Further, soon after the lap spool Is wound with the pre-determined length, the lap forming machine has to be stopped, wherein the lap has to be cut and the separated/cut lap has to be moved forward to the lap lifter assembly, which Is then fed to the combing machine. Conventionally, said lap cutting/tearing/doffing operation in textile lap forming machines is performed as described below.

The prior art system employs a common driving motor which drives the conveying rollers, drafting arrangement, calender rollers and lap rollers in the textile lap forming machines. Further, the drive from the common driving motor Is stopped during lap cutting. Subsequently, a clutch which is arranged between the main calender roller and the lap rollers is disengaged and a separate auxiliary motor associated with free wheel

is connected to the lap rollers and energized to drive only the lap rollers to stretch the lap sheet, thereby tearing/cutting/doffing lap.
However, the prior art system employs clutch and free wheel which requires more maintenance and also uneconomical. Further, the auxiliary motor has to rotate the lap rollers alone when the lap forming machine Is stopped. Therefore, there is a need for an efficient and economical device for cutting the lap in the textile lap forming machine.

SUMMARY OF THE INVENTION

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed invention. This summary is not an extensive overview, and it is not intended to identify key/critical elements or to delineate the scope thereof. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

The primary object of the present invention is to provide an efficient and economical lap cutting device in a textile lap forming machine.

Accordingly the present Invention relates to a textile lap cutting device in a lap forming machine including a set of lap rollers and a plurality of calender rollers rotated in a direction to wind a lap sheet on a lap spool; said lap spool being held between lap discs wherein means are provided to rotate the wound lap in order to cut the lap sheet.

Accordingly the present invention relates to a textile lap cutting device in a lap forming machine wherein the wound lap is rotated by contact means in order to cut the lap sheet. The contact means is preferably a roller made of soft material such as synthetic rubber.

Accordingly the present invention relates to a secondary drive unit wherein the secondary drive unit includes an auxiliary motor; a shaft coaxially arranged and rigidly fitted to an output shaft of the auxiliary motor; a drive pulley rotatably mounted on the shaft; a lever having one end pivotally mounted on the shaft and the other end is provided with a roller; a pressing roller extends through the entire width of the lap; an arm provided to carry the pressing roller and actuating means, wherein one actuating means facilitates selective engagement and/or disengagement of the roller on periphery of at least one of the lap discs and the other actuating means facilitates selective engagement and/or disengagement of the pressing roller on periphery of the wound lap.

In one aspect, the present invention describes a method of textile lap cutting using a textile lap cutting device in a lap forming machine including steps of disengagement of drive to a set of lap rollers a plurality of calender rollers and lap feed when the predetermined length of lap is wound on the lap spool; lifting up of wound lap held between the lap discs away from the lap rollers and displacing near the roller; engagement of drive to the roller by auxiliary motor and actuating means, thereby facilitating selective engagement and/or disengagement of the roller on periphery of at least one of the lap discs; rotating the roller resulting in rotation of the lap discs by friction thereby cutting/tearing the lap; actuating means facilitating selective engagement and/or disengagement of the pressing roller on periphery of the wound lap and pressing of the cut end of the lap by the pressing roller to prevent unwinding of the wound lap from lap spool. The above method of lap cutting/tearing is controlled by a control unit with suitable algorithm/program.

The device disclosed herein may be implemented In any means for achieving various aspects. Other features will be apparent from the accompanying drawings and from the detailed description that follows.

BRIEF DESCRIPTION OF ACCOMPANYING FIGURES

Example embodiments are Illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements and In which:

Figure 1 is a schematic diagram of a lap cutting device in a textile lap forming machine in inoperative position, in accordance with the present invention.

Figure 2 Is a schematic diagram of a lap cutting device in a textile lap forming machine in operative position, in accordance with the present invention.

Figure 3 is a schematic diagram Illustrating a secondary drive unit of the textile lap cutting device, in accordance with the present Invention.

Figure 4 is a cross sectional view of section AA of Figure 2, in accordance with the present invention.

Other features of the present embodiments will be apparent from the accompanying drawings and from the detailed description that follows.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments of the present invention will now be explained with reference to the accompanying drawings. It should be understood however that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. The following description and drawings are not to be construed as limiting the invention and numerous specific details are described to provide a thorough understanding of the present invention, as the basis for the claims and as a basis for teaching one skilled in the art about making and/or using the invention. However in certain instances, well-known or conventional details are not described in order not to unnecessarily obscure the present invention in detail.

The present invention describes an efficient lap cutting device in a textile lap forming machine. A plurality of sliver from the sliver cans arranged in the creel member of the lap forming machine is drafted in the drafting arrangements and lap sheets are produced, which are then fed to the combing machine. The present invention provides a device to cut/doff/tear the textile lap to a pre-determined length by eliminating the usage of clutch and free wheel as employed in conventional systems. The term 'lap' and 'textile lap' are used interchangeably throughout the document. Also, the words 'cutting', 'tearing' and 'doffing' are used interchangeably throughout the document.

Figure 1 is a schematic diagram of a lap cutting device (100) in a textile lap forming machine in inoperative position, in accordance with the present invention. Particularly, the lap cutting device (100) Includes a set of lap rollers (102a, 102b), a plurality of calender rollers (104) (104a, 104b, 104c, 104d), an empty lap spool (106), a driving motor and a secondary drive unit (108), which are coupled as shown in Figure 1. The operation of Figure 1 is illustrated in Figure 2.

Figure 2 is a schematic diagram of a lap cutting device (100) in a textile lap forming machine in operative position, in accordance with the present invention. In operation, the lap rollers (102a, 102b) are rotated in the directions of the arrow as shown in Figure
2. The lap sheet (110) acts as a feed, which is fed as shown by the direction in Figure 2. The said lap sheet (110) is compacted by its passage through the calender rollers (104). Further, the compacted lap sheet is wound on the empty lap spool (106) which is held in between the lap discs (112a, 112b), Furthermore, a driving motor transmits the rotary motion to the lap rollers (102a, 102b) and the calender rollers (104) through various driving elements such as gears and belts which are known in the art. In one embodiment, the secondary drive unit (108) Is employed to cut/tear the lap sheet (110) and to separate the lap package from the running lap, The secondary drive unit (108) is illustrated in Figure 3 and the cross sectional view of section AA^ of Figure 2 is depicted in Figure 4.

Figure 3 is a schematic diagram illustrating a secondary drive unit (108) of the textile lap cutting device, In accordance with the present invention. Particularly, the secondary drive unit (108) includes an auxiliary motor (302), a shaft (304), a lever (306), a drive pulley (308), a roller (310), a transmission means (312), a tensioner pulley (314), an arm (316), a pressing roller (318), a support member (320), a set of actuating means (322a, 322b), which are coupled as shown in Figure 3,In one embodiment, the auxiliary motor (302) includes a reduction gear unit to reduce the power rating. Further, the shaft (304) is coaxially arranged and rigidly fitted to the output shaft of the auxiliary motor (302). The lever (306) Is disposed, one end of which is pivotally mounted on the shaft (304) and carries the drive pulley (308) which is also rotatably mounted on the shaft (304). In one example implementation, the roller (310) which is preferably made of soft material, for example synthetic rubber, is provided on the other end of the lever (306) and driven by the pulley (308).

In one example embodiment, the lever (306) carrying the drive pulley (308) and the roller (310) swivel about the axis of the shaft (304). Further, the transmission means (312) such as a toothed belt is provided to connect the drive pulley (308) and the pulley (308') to facilitate driving of the roller (310). Furthermore, a tensioner pulley (314) is employed to tension the toothed belt (312). In addition, the arm (316) is provided to carry a pressing roller (318) which extends to the entire width of the wound lap.

In one example implementation, one end of the arm (316) is pivoted to a support member (320) at pivot point (P1). One actuating means (322a) such as a pneumatic cylinder is disposed to selectively operate the lever (306) to facilitate the selective engagement and/or disengagement of the roller (310) on the periphery of at least one of the lap discs (112a, 112b). While one end of the actuating means (322a) is pivoted to the (ever (306) at pivot point (P2), the other end is pivoted to the support member (320) at pivot point (P3). Further, another actuating means (322b) such as a pneumatic cylinder is disposed for the selective engagement and/or disengagement of the pressing roller (318) on the periphery of the wound lap which is shown in Figure 2. One end of the actuating means (322b) is pivoted to the support member (320) at the pivot point (P4) and the other end is pivoted to the arm (316) at pivot point (P5).

In operation, soon after the pre-determined length of lap is wound on the lap spool (106), the drive to the calender rollers (104), lap rollers (102a, 102b) and the feed side is disengaged by the control system to facilitate cutting of the lap. The wound lap on the lap spool (106) held between the discs (112a, 112b) which are rotatably mounted on the respective loading arms is lifted upwards and displaced near the roller (310) by means of a control unit (not shown). The auxiliary motor (302) is switched ON and the roller (310) is driven. Subsequently the actuating means (322a) is actuated which causes the roller (310) to engage with the periphery of at least one of the lap discs (112a, 112b), The roller (310) provides frictional drive to the lap discs (112a. Il2b) by contact.

The wound lap held between the lap discs {112a, 112b) and the lap discs (112a, 112b) are revolved. Since the calender rollers (104) are held stationary and there is no lap feed, a stretch is introduced in the region between the calender rollers (104) and the wound lap resulting in cutting/tearing/doffing of the lap sheet (110).
Simultaneously, as shown in Figure 4, the actuating means (322b) is actuated which facilitates the swinging of the pressing roller (318) and causes the pressing roller (318) to engage with the periphery of the lap, resulting in pressing of the outer layer of the lap sheet wound on the lap spool (106). Thus facilitating the separated lap end to be pressed onto the lap spool (106) and held on the outer layer of the lap thereby preventing unwinding of the wound lap from lap spool at the time of lap cutting. This also minimizes the unwinding of the lap sheet during rolling out from the lap winding zone as well as during subsequent handling of the lap. The above method of lap cutting/tearing is controlled by a control unit with suitable algorithm/program.

In one example embodiment, the surface of the lap discs (112a, 112b) can be profiled like gear teeth. The contact means can be a gear wheel instead of roller. The profiled lap disc can be rotated by gear wheel contact thereby cutting the lap.

It is advantageous that the present invention provides a lap cutting device eliminating the usage of clutch and free wheel. The power rating of the auxiliary motor used for cutting/tearing/doffing the lap is considerably reduced by eliminating the requirement of driving the lap rollers for cutting/tearing/doffing the lap sheet. Further, a pressing roller is provided to press the final layer of the lap sheet to minimize the unwinding of the lap sheet during cutting/tearing/doffing and loading in the combing machine, thus reducing the cutting/tearing/doffing time.

In general, it is clear that the present Invention and its advantages are not limited to the above described embodiments only. With minor modifications, substitutions and equivalents will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as described In the claims. Accordingly, the specification and figures are to be regarded as illustrative examples of the invention, rather than in restrictive sense.

WE CLAIM

1. A textile lap cutting device in a lap forming machine comprising;

a set of lap rollers (102a, 102b) and a plurality of calender rollers (104) rotated in a direction to wind the lap sheet (110) on a lap spool (106); and

said lap spool (106) being held between lap discs (112a, 112b), wherein means are provided to rotate the wound lap in order to cut the lap sheet (110).

2. The device as claimed in claim 1, wherein the wound lap is rotated by contact means in order to cut the lap sheet (110).

3. The device as claimed in claim 2, wherein contact means is a roller (310) made of soft material such as synthetic rubber.

4. The device as claimed in claim 1, wherein a secondary drive unit (108) is provided to cut the lap sheet (110).

5. The device as claimed in claim 4, wherein the secondary drive unit (108) comprises: an auxiliary motor (302);

a shaft (304) coaxially arranged and rigidly fitted to an output shaft of the auxiliary motor (302);

a drive pulley (308) rotatably mounted on the shaft;

a lever (306) having one end pivotally mounted on the shaft (304) and the other end is provided with a roller (310);

a pressing roller (318) extends through the entire width of the lap;

an arm (316) provided to carry the pressing roller (318); and

an actuating means (322a, 322b).

6. The device as claimed in claim 5, wherein one actuating means (322a) facilitates selective engagement and/or disengagement of the roller (310) on periphery of at least one of the lap discs (112a, 112b) and the other actuating means (322b) facilitates selective engagement and/or disengagement of the pressing roller (318) on periphery of the wound lap.

7. The device as claimed in claim 3, wherein a transmission means (312) facilitates driving of the roller (310) and a tensioner pulley (314) provides tension to the said transmission means (312).

8. The device as claimed in claim 5, wherein the lever (306) carries a drive pulley (308) and the roller (310) which swivels around an axis of the shaft (304).

9. A method of textile lap cutting in a lap forming machine comprising steps of:

disengagement of drive to a set of lap rollers (102a, 102b) and a plurality of calender rollers (104) when the pre-determined length of lap is wound on the lap spool (106);

lifting up of wound lap held between the lap discs (112a, 112b) away from the lap rollers (102a, 102b) and displacing near the roller (310);

engagement of drive to the roller (310) by auxiliary motor (302) and actuating means (322a), thereby facilitating selective engagement and/or disengagement of the roller (310) on periphery of at least one of the lap discs (112a, 112b);

rotating the roller (310) resulting in rotation of the lap discs (112a, 112b) by friction thereby cutting the lap;

actuating means (322b) facilitating selective engagement and/or disengagement of the pressing roller (318) on periphery of the wound lap; and

pressing of the cut end of the lap by the pressing roller (318) to prevent unwinding of the wound lap.

10. The method as claimed in claim 9, wherein a control unit is provided for lifting the wound lap in order to cut the lap sheet.