Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
  • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
  • D06C3/02—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by endless chain or like apparatus
  • D06C3/028—Devices for feeding material onto or removing it from stenders
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
  • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
  • D06C3/02—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by endless chain or like apparatus

Definitions

• the present invention relates to fabric treatment plants, and in particular refers to a system for collecting fabric exiting from a stenter line.
• the present invention also relates to a fabric treatment plant comprising a collection system of this type and also to a process for collecting fabric exiting from a stenter line.
• a "stenter” machine or line is a machine used for continuous drying of a fabric by means of a flow of hot air and more in general to give particular aesthetic characteristics or finishes to the fabric, for example after impregnation with various chemical products.
• stenter lines such as the flat stenter, in which the fabric moves substantially along a rectilinear path on a single level, or "stenters" with several paths, in which the fabric is made to turn several times exiting from the side on which it entered.
• the fabric is conveyed by means of two parallel chains, arranged in a closed loop between motorized return pulleys and which move at the speed established by the operator.
• These chains are provided with grippers or pins to constrain the parallel lateral edges of the layer of fabric.
• the fabric At the end of treatment on the stenter (drying or the like) the fabric must be collected in layers or rolls of large or small diameter.
• a chute positioned downstream of the stenter is used, so that once the same fabric is detached from the chains, it is carried to the fixed chute, consequently sliding downward into an area in which the fabric is accumulated and guided toward a roll collection unit.
• the object of the present invention is to develop a system for collecting and accumulating fabric exiting from a stenter line that enables optimization of space around the same stenter line.
• Another important object is that of producing a system for collecting fabric exiting from a stenter line that makes it possible to reduce the risk of damage to the fabric during the pick-up step from the stenter.
• a further object of the present invention is to provide a method for collecting the fabric exiting from the stenter which is improved with respect to known methods.
• a system for collecting fabric exiting from a stenter line which comprises accumulation means of the fabric exiting from the stenter line (in the form of a movable accumulation surface, with speed at least lower than the speed of the stenter line), and subsequent collection unit of the fabric; characteristically, the accumulation means of the fabric are arranged below the final portion of the stenter line, with said final portion at least partly superimposed on the accumulation means.
• stenter line or, equivalently, “stenter”, is intended as any known type of stenter machine or line, generally provided with a pair of parallel chains onto which the lateral edges of the fabric can be fixed, for example using needles, clamps or grippers.
• this final portion of stenter is referred to at least a part of stenter line upstream of the area of detachment of the fabric from the stenter chains, although the chains continue their travel even after detachment to an end return area thereof (for example an area in which the chains invert their movement turning around a return pulley).
• the superimposing can take place only for a final portion of stenter comprised between the area of detachment of the fabric from the chains and the area of return of the chains toward the start of the line.
• the term "superimposed” is intended to mean that, according to a plan view, the area of the final portion of the stenter line intersects the area that circumscribes the accumulation means (or vice versa, i.e. the plan area that circumscribes the accumulation means intersects the plan area of the final portion of stenter line), which are at a lower height with respect to the final portion of the stenter line.
• This configuration makes it possible to reduce the amount of space occupied around the stenter line with respect to systems in which the stenter lines end on accumulation chutes.
• the final portion of stenter line is superimposed on the accumulation means of the fabric for at least half the longitudinal length of the accumulation means and more preferably for at least 2/3 of the longitudinal length of these means, and even more preferably for at least 3 ⁇ 4 of the longitudinal length of these means.
• the accumulation means are substantially contained below the stenter line for the greater part thereof, i.e. with reference to the longitudinal extension of this line, contained for the greater part thereof between the initial and final longitudinal limits of the stenter line (for example the two initial and final return rollers of the chains).
• the stenter line ends with a return pulley for a pair of chains for conveying the fabric so that the chains invert their direction of motion; on a portion of stenter line before this end return pulley for the chains, there is provided a separator of the fabric from the chains and a movement device (or more in general, movement means) to move the fabric separated from the chains, such that the fabric is moved downward through the line between the chains, and subsequently deposited on the accumulation means below.
• a movement device or more in general, movement means
• This movement device comprises, according to some preferred embodiments, protective screens arranged adjacent to the internal sides of respective chains and adapted to delimit a space between these chains that enables the fabric to be moved downward without the risk of touching the chains; from the inside to the outside of the line (transverse thereto) the arrangement of the elements is therefore as follows: 1) chain, 2) screen, 3) space for movement of the fabric, 4) screen, 5) chain.
• the separator of the fabric from the chains is provided with cutting means adapted to cut the opposite longitudinal edges of the fabric fixed to the two chains.
• the accumulation means comprise an accumulation surface movable with a speed at least lower than the movement speed of the fabric in said final portion of stenter line.
• This moving surface is below the final portion of the stenter, according to what was stated above in relation to the generic accumulation means.
• the accumulation surface is provided with means to vary the rate of speed to set at least two rates of speed, a first rate at which it moves at the movement speed of the fabric in said final portion of stenter line (i.e. substantially at the speed of the stenter line) corresponding to the normal step of movement of the stenter line, and a second rate at which the speed of the accumulation surface is lower than the movement speed of the fabric in said final portion of stenter line.
• the means for transferring the accumulated fabric toward the collection support are reactivated at a speed greater than the speed of the stenter line, so as to eliminate the quantity of fabric accumulated on the accumulation surface. After the fabric accumulate has been emptied, the accumulation surface is accelerated and returned to the speed of the stenter line.
• the speed of the accumulation surface can, for example, always be lower than the speed of the stenter line, so that there is always an accumulation of fabric.
• this accumulation surface is substantially horizontal.
• the direction of movement of this accumulation surface is concordant with the movement of the final portion of the stenter line.
• the term "concordant" is intended to mean that the horizontal components of the movement speed of the surface and of the final portion of the stenter are moving in the same direction (the vectors of speed of the accumulation surface and of the final portion of stenter can, for example, be incident in the direction of feed, for example, because the final portion of stenter. is inclined downward while the accumulation surface below is horizontal).
• the accumulation means are produced by means of a conveyor belt at least partly below said final portion of stenter line and, in a preferred embodiment, below the final portion for the greater part of its longitudinal extension (i.e. the direction of feed of the upper portion of the conveyor belt).
• the term "below” is intended to mean the inverse of the term "superimposed” defined above.
• Conveyor belt is intended as a flexible movement member, preferably in a closed loop, comprising at least one return roller and one movement member.
• the surface of the conveyor belt on which the fabric rests can, for example, be a belt, an assembly of parallel strips or chains, a mesh, etc.
• the system is provided with means for measuring and adjusting the longitudinal tension (or traction) of the fabric exiting from said stenter line and entering said accumulation means, e.g. a load cell associated with a return roller arranged between the stenter line and the accumulation means and optionally a drawing cylinder that adjust the pull on the fabric on the basis of the value measured by the load cell.
• a load cell associated with a return roller arranged between the stenter line and the accumulation means and optionally a drawing cylinder that adjust the pull on the fabric on the basis of the value measured by the load cell.
• the system is produced so that the collection unit is provided with a winding roller on which the fabric is wound.
• the roller is preferably of the self- centering type, with axis free to move vertically and rotatable by tangential drawing, i.e. the winding roller with the wound fabric rests on two drawing and rotating cylinders which transmit the tangential motion to the roller with the fabric so as to cause winding of the fabric on the roller, and displacement of the roller upward to increase the distance between axis of the roller and drawing cylinders due to the increase in the layers of fabric around the same roller.
• the collection unit can comprise a device for collecting fabric in layers or a winder on roller with fixed rotation axis, for example such as those known commercially with the name "A-Frame”.
• downstream of the accumulation means and upstream of the collection device preferably in the version with self-centering winding roller with moving axis
• means for transferring the fabric toward the collection device which comprise a device for transverse centering of the fabric with respect to the same collection device.
• this centering device is provided with a rotating cylinder, on the surface of which slats are arranged, parallel to the rotation axis, movable in axial direction according to displacements controlled by a control system; the fabric is guided on this cylinder and the slats are provided with a surface coated with a material according to which, when a slat moves axially, the fabric resting thereon tends to follow the slat.
• this centering device with slats is provided with means for identifying the axial position of the fabric (i.e. with respect to the axis of the cylinder with slats) adapted to interact with said slats to correct the axial position through movement of the slats.
• the collection system has no fabric treatment means between the final portion of the stenter line and the collection means. Centering of the fabric for collection and adjusting the tension thereof are not considered treatments.
• the collection unit operates immediately downstream of the accumulation means, without interposition of other treatment devices or of other processes.
• the invention also relates to a plant that uses a system according to one or more of the embodiments above, i.e. which comprises a stenter line, accumulation means and a device for collecting the fabric, as well as any other components.
• the invention also relates to the use of a conveyor belt as accumulation surface for the fabric exiting from a stenter line, to be arranged at least partly below the final portion of said stenter line; advantageously the conveyor belt moves at least at a speed lower than the movement speed of the fabric in the final portion of stenter line, enabling accumulation of the fabric and preferably according to at least two rates of speed, a first rate at which the conveyor belt moves at the movement speed of the fabric in said final portion of stenter line (i.e. substantially at the speed of the stenter line) corresponding to the normal step of movement of the stenter line, and a second rate at which the speed of the conveyor belt is lower than the movement speed of the fabric in said final portion of stenter line
• the present invention also relates to a process for collecting fabric exiting from a stenter line, which comprises a step of accumulation of fabric on a surface at least partly below the stenter line and a subsequent collection step, preferably by winding or arrangement in superimposed layers; said accumulation surface is movable with a speed at least lower than the movement speed of the fabric in at least the final portion of the stenter line and preferably according to at least two rates of speed, a first rate at which the accumulation surface moves at the movement speed of the fabric in said final portion of stenter line (i.e. substantially at the speed of the stenter line) corresponding to the normal step of movement of the stenter line, and a second rate at which the speed of the accumulation surface is lower than the movement speed of the fabric in said final portion of stenter line.
• the collection step of the fabric takes place immediately after accumulation of the same fabric, without other processes or treatments.
• Fig. 1 represents a schematic side view of a part of plant producing a system for collecting fabric exiting from a stenter line according to the invention, wherein the fabric is collected on a collection device with winding roller of the self-centering type with axis free to move vertically and rotatable by tangential drawing;
• Fig. 2 represents a schematic axonometric view of a part of the end portion of the stenter line in the system shown in Fig. 1.
• a plant producing a system for collecting fabric exiting from a stenter line according to the invention is indicated as a whole with the number 10.
• This plant is provided with a stenter line, whose final portion is indicated with the number 11 (only this final portion of stenter line is visible in the figures, the part that is not visible being substantially of known type).
• the stenter line comprises a pair of parallel chains 12 for conveying the fabric which are closed in a loop and guided, in this example at least by an end return roller 13 which in practice forms the final part of the stenter line; this stenter line will therefore be provided with an upper portion 12' of parallel chains 12 and a lower portion 12".
• the chains in this example, substantially of known type are provided with fixing means 14 (in this example of known type) for the parallel and opposite edges of fabric T, for example comprising needles on which the lateral edges of the fabric are blocked.
• the chains 12 move parallel to each other on return means (including the end return roller 13) and convey (according to the arrow fl) the fabric toward the end of the line, after having performed the desired treatments on the fabric.
• the final portion 1 1 of the stenter line is, for the final part thereof, inclined downward (i.e. the upper portion 12' of the chains 12 is inclined downward).
• a separator 15 of the fabric from the chains 12 On the final portion 11 of the line there is provided a separator 15 of the fabric from the chains 12 and a movement device (or more in general, movement means) to move the fabric after separation from the chains, such that the fabric is moved downward through the line, between the chains, and subsequently deposited on the accumulation means 17 below, better described later.
• a movement device or more in general, movement means
• the movement device is formed by a plurality of elements, among which are return rollers 16A, 16B, 16C (preferably idle), a roller with load cell 16D and a drawing cylinder 16E; in this example these elements 16 are arranged in series to define the path of the fabric between the separator 15 and the accumulation means 17 according to the following order: a first roller 16A above the upper portion 12' of the chains 12, a second roller 12B below the lower portion 12" of the chains 12, a roller with load cell 16D below the lower portion 12", a third roller 16C below the roller with load cell 16D and a drawing cylinder 16E arranged in height between the rollers 16B and 16C.
• return rollers 16A, 16B, 16C preferably idle
• a roller with load cell 16D and a drawing cylinder 16E
• these elements 16 are arranged in series to define the path of the fabric between the separator 15 and the accumulation means 17 according to the following order: a first roller 16A above the upper portion 12' of the chains 12, a second roller 12B below
• this movement device can be provided with different elements and not comprise all or some of the elements mentioned herein. Also the relative position of these elements can vary according to needs. It is understood that this movement device can also be viewed simply as the assembly of means that divert the separated fabric (cut or detached) downward with respect to the path in the stenter line.
• the device for moving the fabric downward also comprises, advantageously, protective screens 16F'and 16F" arranged adjacent to the internal sides of respective chains 12 and adapted to delimit a space between the same chains which enables the fabric to be moved downward without the risk of touching the chains; therefore, from the inside to the outside of the line (transverse thereto) the arrangement of the elements is as follows: 1) chain, 2) screen, 3) space for movement of the fabric, 4) screen, 5) chain. More in particular, this example is provided with a first pair of screens 16F', placed side by side inside the chains 12 of the upper portion 12', and a second pair of screens 16F" placed side by side inside the chains 12 of the lower portion 12" (and therefore below the screens 12').
• the separator 15 is provided with two operating modes.
• a first mode provides for separation of the fabric from the needles forming the fixing means 14 by means of simple detachment from the same needles (the path of the fabric T according to this first mode is shown with a continuous line in Fig. 1 ; in this configuration, the fabric is guided on the first return roller 16A (passing through a preliminary cantilevered return roller 16A').
• a second mode provides for cutting by means of a cutter unit 15A adapted to cut the opposite lateral (i.e. longitudinal) edges Tl of the fabric T fixed to the two chains 12 (the cutting line is indicated with the letter L and schematized with a dashed line on the part of fabric T schematized in Fig. 2). From the cutter unit (exiting from which the fabric is indicated with a dashed line in Fig. 1) the cut fabric T is guided downward through the further first roller 16 A" (arranged above the first roller 16A).
• the protective screens 16F ensure that the fabric does not touch the chains 12 while it moves downward, preventing the fabric from accidentally catching on the same chains.
• the detached or cut fabric T is guided downward in the space comprised between the chains 12 of the upper and lower portions of the chains 12' and 12", i.e. through the end portion 11 of the stenter line, to the second return roller 16B, as indicated above, passing between the protective screens 16F.
• the fabric is wound partly on the roller with load cell 16D which measures the drawing tension thereof and is then transferred to the drawing cylinder 16E through the third return roller 16C.
• the drawing cylinder cooperates with the roller with load cell 16D to maintain the fabric with the desired tension/traction.
• the aforesaid accumulation means 17 are arranged below the drawing cylinder, and below the final portion 11 of stenter line. According to the invention, the accumulation means of the fabric are arranged below the final portion of the stenter line, with said final portion at least partly superimposed on the accumulation means.
• these accumulation means 17 comprise an accumulation surface 18, movable according to the arrow f2, associated with means that enable it to vary its speed according to at least two rates of speed: a first rate at which the surface 18 moves at the movement speed of the fabric T in the final portion of stenter line (i.e. substantially at the speed of the stenter line) corresponding to the normal step of movement of the stenter line, and a second rate at which the speed of the accumulation surface 18 is lower than the movement speed of the fabric in the final portion of stenter line, so that accumulation forms on this same surface 18, forming slight undulations.
• the direction of movement of the surface 18 is concordant with the direction of movement of the fabric T when it is on the stenter line, or, more in general, with a longitudinal direction from below the end portion 11 of stenter line (whose longitudinal end is represented by the line Nl in Fig. 1, in practice corresponding to the external space occupied by the end return roller 13) outside the projection of the stenter line, preferably crossing the line Nl, i.e. passing below the end return roller 13 of the line.
• this accumulation surface 18 is advantageously horizontal.
• the accumulation means 17 are produced by means of a conveyor belt 19 of the closed loop type, whose upper surface on which the fabric T being accumulated rests corresponds to the aforesaid surface 18.
• This conveyor belt 19 is for example a closed loop flexible belt (or other flexible member) guided between two return rollers 20, one of which is motorized.
• the movement speed of this belt surface 18 has at least two rates of speed, one lower than the movement speed of the chains 12 of the stenter and one substantially the same during normal operation of the line (i.e. when the fabric is collected downstream thereof, as will be better explained later).
• the superimposing of the final portion 11 of the stenter line on the conveyor belt 13 comprises a part of stenter line upstream of the area of detachment of the fabric from the chains, although the chains continue their path also after detachment until reaching the end return pulley 13.
• upstream or downstream refer to a longitudinal direction, in practice from left to right with respect to the drawing of Fig. 1.
• the detachment area is marked by the line N4 and the superimposing "upstream" of the detachment N4 on the conveyor belt 19 will be obtained for a quantity S2 (i.e. comprised between the lines N4 and N3, with N3 being the line that identifies in longitudinal direction the start of the space occupied by the belt 19).
• the detachment area is marked by the line N2 and the superimposing "upstream " of the detachment N2 on the conveyor belt 19 will be obtained for the quantity SI (i.e. between the lines N3 and N2).
• the superimposing according to the invention takes place in any case "upstream" of the line Nl, i.e. the line that defines the maximum longitudinal space occupied by the final portion of stenter (external space occupied by the end return roller 13).
• the stenter line is superimposed on the conveyor belt 19 by a quantity S3, i.e. by the space comprised between Nl and N3.
• S4 comprised between Nl and N5
• N5 the line that identifies in longitudinal direction the end of the footprint of the belt 19.
• the final portion of stenter line is superimposed on the conveyor belt 19 for at least 4/5 of the length of this latter.
• this superimposing takes place for at least half of the conveyor belt, and preferably for at least 2/3 and even more preferably for at least 3 ⁇ 4 of the conveyor belt.
• this belt can extend below the stenter line also up to more central portions with respect to that indicated herein (i.e. the inclined part of the final portion 11 of the stenter line).
• the accumulation means in this example, the conveyor belt
• the accumulation means are substantially contained for the greater part thereof below the stenter line, i.e. with reference to the longitudinal extension of this line, contained for the greater part thereof between the initial and final longitudinal limits of the stenter line (for example, the two initial and final return rollers of the chains).
• This configuration makes it possible to reduce the occupation of space around the stenter line with respect to systems in which the stenter lines end on accumulation chutes.
• the accumulation means can be completely below the stenter line, i.e. arranged completely upstream of the line Nl or of the lines N2 or N4.
• the system is provided with a device 21 for collecting the fabric.
• this collection device 21 is provided with a winding roller 22 arranged downstream of the conveyor belt 19, onto which the fabric T is wound.
• the roller is preferably of the self-centering type with axis free to move vertically and rotatable by tangential drawing.
• the winding roller 22 rests on two drawing cylinders 23, usually arranged at the same height and with the same diameter. At least one of the two drawing cylinders 23 is motorized.
• the initial edge of the fabric is fixed on the winding roller 22.
• the drawing cylinders 23 are made to rotate and consequently the winding roller 22 also rotates, by tangential drawing, consequently winding the fabric T around it.
• the thickness of the fabric on the winding roller increases and therefore the rotation axis of the same roller 22 shifts upward (in this step it is the wound fabric that rest on two drawing cylinders 22 and which is therefore subjected to the tangential drawing thereof.
• a collection device 21 of this type combined with the accumulation means arranged downstream of the stenter line, enables the fabric to be collected without interrupting the feed of the fabric in the stenter, i.e. without having to stop the treatments on the fabric (if necessary simply slowing the feed speed of the chains in the stenter), as will be explained in more detail later.
• downstream of the conveyor belt 19 and upstream of the collection device 21 means for transferring the fabric are provided, which comprise a device 24 for transverse centering of the fabric T with respect to the same collection device 21.
• this centering device 24 is provided with a rotating drum 25 on the surface 25 A of which slats 26 are arranged parallel to the rotation axis and movable in axial direction according to displacements controlled by a control system (not indicated in the figures).
• the fabric T is guided on this rotating drum 25 and the slats 26 are provided with a surface coated in a material (for example a silicone resin) such that when a slat 26 moves axially the fabric resting thereon tends to follow the movement of the first slat. Therefore, the fabric can be translated axially (i.e. transverse with respect to the direction fl) enabling centering thereof on the subsequent winding roller 22.
• Means 27 are provided for identifying the position of the fabric (for example, photocells or the like) with respect to the axis of the rotating drum 25, adapted to interact with said slats (and therefore with the aforesaid control system) to correct the axial position of the fabric through movement of the slats.
• the transfer means also comprise further return rollers for the fabric downstream of the conveyor belt 19.
• it is provided with a fourth return roller 28A, which carries the fabric to be positioned with horizontal tangency to the rotating drum 25, and with a fifth return roller 28B, which maintains the fabric wound partly on the drum 25 and guides the fabric upward toward a sixth return roller 28C, which directs the fabric toward a further roller with load cell 28D, from which the fabric enters the collection device 21 (the roller with load cell 28D cooperates with the drawing cylinders 23).
• the collection device with self- centering winding roller with free axis 22, the centering device 24, the conveyor belt 19 and the end return roller 13 of the chains of the stenter line are associated with a common supporting frame 29.
• the collection unit can comprise a collection device of the fabric in layers or a winder on a roller with fixed rotation axis, for example such as those known commercially with the name "A-Frame" (not shown in the figures).
• the moving arm that enables, for example, winding in layers or on a roller is indicated with 30 in the figure and is pivoted to the frame 29. Further return rollers 30 A are provided to carry the fabric to the arm 30.
• Operation of the conveyor belt 19 for accumulation is as follows: when it is necessary to remove the fabric collected from the collection device 21 to take it to a store or to other treatment centers, the conveyor belt 19 that normally moves at the same speed as the stenter line (and therefore does not accumulate fabric), is slowed down, i.e. taken to a speed lower than the stenter line, so that the fabric T starts to accumulate thereon. In this step the fabric is accumulating on the conveyor belt and therefore it is possible to cut the fabric at the top of the winding roller 22 of the collection device 21 and replace this roller 22 without stopping the stenter line (the conveyor belt acts as fabric accumulator); naturally, the means for transferring the fabric from the conveyor belt 19 to the collection device 21 are stopped.
• the means for transferring the fabric accumulated toward the collection support are reactivated at a greater speed than the speed of the stenter line, so as to eliminate the quantity of fabric accumulated on the conveyor belt 19.
• the conveyor belt 19 is accelerated and returned to the speed of the stenter line.
• the speed of the conveyor belt can be lower than the speed of the stenter line also during the normal step of collecting the fabric on the collection device 21 ; in this way the fabric is in practice always accumulated on the conveyor belt; to make sure that the collection speed is the same as the movement speed of the fabric in the stenter, the fabric exiting from the conveyor belt can be accelerated by the means for transfer to the collection device.
• the use of the conveyor belt 19 as accumulation surface for the fabric exiting from a stenter line, to be arranged at least partly below the final portion 11 of the stenter line, makes it possible to reduce occupation of space, obtaining a more compact plant, and also reduces damage to the fabric caused by folds in the accumulation chutes of known type.
• Optimum accumulation due to the movement of the fabric accumulation surface according to speeds variable with respect to that of the fabric on the stenter enables the fabric to be collected in rolls without interrupting the operation of the plant.
• this conveyor belt as accumulation surface for the fabric exiting from a stenter line, to be arranged at least partly below the final portion of the stenter line, can be combined with the stenter line regardless of the type of machines and stations downstream of the stenter line, simply to accumulate fabric for any further operations that do not require collection.
• the present invention also relates to a process for collecting fabric exiting from a stenter line, which comprises a step of accumulation of fabric T on a surface 18 at least partly below the stenter line and a subsequent collection step preferably by winding and more preferably by winding on a roller 22 with rotation axis which can translate vertically and is rotatable by tangential drawing, as described above.
• the accumulation surface 18 is preferably movable with a speed at least lower than the movement speed of the fabric in at least the final portion 11 of the stenter line; more preferably the accumulation surface is movable according to at least two rates of speed, a first rate at which it moves at the movement speed of the fabric in said final portion of stenter line (i.e. substantially at the speed of the stenter line) corresponding to the normal step of movement of the stenter line, and a second rate at which the speed of the accumulation surface is lower than the movement speed of the fabric in said final portion of stenter line.
• the process can comprise a step of removing the fabric collected, wherein the moving surface 18 is taken to a speed lower than the stenter line, so that the fabric T starts to accumulate on this surface 18; in this step the fabric T accumulates and the fabric collection device 21 downstream of the stenter line is emptied of the fabric collected, without interrupting the movement of the same line; in this step the means that transfer the fabric from the accumulation surface 18 to the collection device 21 are stopped; once a new empty winding roller 22 has been positioned downstream of the stenter line, the means for transferring the fabric accumulated to the collection device 21 are reactivated at a speed greater than the speed of the stenter line, so as to eliminate the quantity of fabric accumulated on the accumulation surface 18. After the fabric accumulated has been emptied, the accumulation surface 18 is accelerated and returned to the speed of the stenter line.
• the process can also comprise a step of centering the fabric entering the winding roller with an optional step of controlling the axial position of the fabric prior to correcting the position, improving centering thereof.
• the process can provide for a part for controlling the traction of the fabric after detachment from the stenter line and before arrangement on the moving surface, with optional adjustment of the traction.
• the process can include a step of transverse cutting of the fabric entering the winding device downstream of the accumulation surface 18 after a desired quantity has been wound, of replacing the winding roller with the fabric that has just accumulated with a new empty roller, and a subsequent step of fixing the final edge of the fabric to the roller; during the aforesaid steps from cutting the fabric to fixing the final edge, the fabric T continues to accumulate on the surface 18, without interruption.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Media Introduction/Drainage Providing Device (AREA)
• Prostheses (AREA)
• Apparatus For Radiation Diagnosis (AREA)
• Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
• Details Of Garments (AREA)

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• 2011
  • 2011-09-09 IT IT000195A patent/ITFI20110195A1/it unknown
• 2012
  • 2012-09-05 CN CN201280052016.6A patent/CN103890259B/zh not_active Expired - Fee Related
  • 2012-09-05 WO PCT/IB2012/054584 patent/WO2013035049A1/en active Application Filing
  • 2012-09-05 EP EP12772497.9A patent/EP2753744A1/en not_active Withdrawn
  • 2012-09-05 BR BR112014005334A patent/BR112014005334A2/pt not_active IP Right Cessation

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