EP3363916A1 - Vorrichtung zum flachen ausbreiten einer flexiblen membran - Google Patents

Vorrichtung zum flachen ausbreiten einer flexiblen membran Download PDF

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Publication number
EP3363916A1
EP3363916A1 EP18157727.1A EP18157727A EP3363916A1 EP 3363916 A1 EP3363916 A1 EP 3363916A1 EP 18157727 A EP18157727 A EP 18157727A EP 3363916 A1 EP3363916 A1 EP 3363916A1
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EP
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Prior art keywords
membrane
elements
flattening
flexible membrane
stretching
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EP18157727.1A
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English (en)
French (fr)
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EP3363916B1 (de
Inventor
Didier Marie Bruno Henri Chambon
Stephen Charreyron
Romain CHAMBON
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Turner Sas
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Turner Sas
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Publication of EP3363916A1 publication Critical patent/EP3363916A1/de
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    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
    • C14B17/06—Work feeding or clamping devices

Definitions

  • the present invention relates to the general field of treatment of flexible membranes, and more particularly membranes of the animal skin type.
  • the present invention thus relates in particular to the general sector of the industrial tannery.
  • the present invention relates more particularly to a device and a method for flattening flexible membrane, of the kind piece of animal skin.
  • this introduction device makes it possible to obtain a satisfactory quality of finished product by limiting the pressure necessary to exert on the pieces of skin in the slitter (that is to say the pressure exerted by rotating rollers of the slitter), reducing the risk of appear marks on the "flower" of said skins, which is the noble part, that is to say the most sought.
  • this introduction device if it gives overall satisfaction, does not guarantee a perfectly even and sufficient flattening of the skins to systematically avoid any source fold fault.
  • said skins, before their introduction into said introduction device are of uneven thickness, wet, wrinkled and slippery, and although their general condition is improved by said introduction system, it does not allow to avoid any crease just before their introduction between the rotary rollers of said slitter.
  • this device is bulky, of complex and expensive construction, and does not allow to obtain a satisfactory flattening of the skins especially locally, in a limited space, as at the entrance of the rotary rollers of an industrial tannery machine such as a slitter or a machine for finishing type dyeing.
  • an industrial tannery machine such as a slitter or a machine for finishing type dyeing.
  • flaps "scraping" transversely said skins on a large surface of the latter.
  • the objects assigned to the invention are therefore intended to remedy the various disadvantages mentioned above and to propose a new device for flattening flexible membrane which, while being robust, inexpensive and of limited space, is extremely effective and preserves the integrity of said membrane.
  • Another object assigned to the invention is to provide a new flattening device particularly reliable and simple structure.
  • Another object assigned to the invention is to propose a new flattening device whose implementation within an industrial tannery production line is easy, fast and cheap.
  • Another object assigned to the invention is to propose a new flattening device capable of ensuring flattening even in small spaces.
  • Another object assigned to the invention is to propose a new device for flattening flexible membrane which can easily adapt to different types of flexible membranes.
  • Another object assigned to the invention is to propose a new flattening device particularly suitable for soft skins of animal skin type.
  • Another object assigned to the invention is to propose a new flattening device which makes it possible to remove the folds of a flexible membrane irrespective of the orientation of said folds.
  • Another object assigned to the invention is to provide a new flattening device that allows to lay a flexible membrane without degrading the surface.
  • Another object assigned to the invention is to provide a new flattening device that allows to stretch a flexible membrane without tearing.
  • Another object assigned to the invention is to propose a new flattening device which makes it possible to increase the profitability of an industrial tannery treatment.
  • a device for flattening flexible membrane of the animal skin component type, characterized in that it comprises at least two elements each designed to move in translation. cyclic according to a respective trajectory describing a respective closed curve, said respective displacements in cyclic translation of said two elements being at least partially symmetrical so that said two elements come simultaneously and intermittently press said membrane against a support while moving away from it one of the other to locally stretch said membrane.
  • the objects assigned to the invention are also achieved by means of a method for flattening flexible membranes, of the animal skin component type, characterized in that it comprises at least one primary stretching stage, in which which at least two elements each move in cyclic translation according to a respective trajectory describing a respective closed curve, said respective displacements in cyclic translation of said two elements being at least partially symmetrical so that said two elements come simultaneously and intermittently press said membrane against a support while moving away from each other to locally stretch said membrane.
  • the present invention relates to a flattening device 13 of flexible membrane 12, of the kind piece of animal skin.
  • said device 13 makes it possible to reduce or even eliminate all the folds of a flexible membrane 12, in particular by locally stretching said membrane 12.
  • Said flattening device 13 is in particular intended to be integrated within an industrial tannery unit to improve the quality of treatment of said flexible membrane 12, by putting said membrane flat before said treatment. This is for example a slitting operation carried out by a slitter, or a dyeing operation performed by a suitable machine. More particularly, said flattening device 13 is intended to be incorporated in a flexible membrane introduction system which drives said membrane, in a direction of flow, to an industrial tannery machine exerting said treatment, for example a slitter.
  • Said flexible membrane 12 is of the animal skin kind, and is preferably a natural animal leather. It can also be a membrane with similar characteristics and therefore likely to be flattened, for example before treatment, including an industrial tanning treatment.
  • said flexible membrane 12 is for example a synthetic leather, a woven fabric or a nonwoven fabric.
  • Said membrane 12 is said to be flexible, that is to say that it is capable of forming folds, for example during transport or handling, and that said folds can be eliminated without tearing said membrane 12 for example by stretching it.
  • Said flexible membrane 12 is very preferably of substantially flat general shape, although it may have irregularities, and has two opposite faces and a thickness. A fold of said flexible membrane corresponds, for example, to a local doubling or tripling of its thickness, or to a relief or a bump on one of said two faces (corresponding to a concavity or a depression on the other of said two faces). faces).
  • Said flattening device 13 comprises at least two elements 2a, 2b each designed to move in cyclic translation according to a respective trajectory describing a respective closed curve.
  • said two elements 2a, 2b each perform a respective displacement during which, at any moment, each keeps the same orientation in space.
  • Each of said two respective displacements in translation is cyclic, that is to say, repeatedly in time, according to a respective trajectory describing a respective continuous curve folding on itself.
  • the respective curve can be for example of shape polygonal, curvilinear or elliptical. It advantageously describes an ellipse, preferably a circle (it may be considered in particular that a circle represents a particular case of ellipse).
  • Each of said two displacements in cyclic translation preferably has a respective period at the end of which it repeats, preferably identically, said two respective periods being advantageously substantially close, preferably equal as illustrated.
  • said trajectory of each of said two elements 2a, 2b is substantially elliptical.
  • the respective trajectory of each of said two elements 2a, 2b is substantially circular, said two elements 2a, 2b thus preferably moving each in respective circular translation (that is to say according to a displacement respective circular, or in a path where the elements 2a, 2b each perform a respective circular trajectory), in the manner of a nacelle in a ferris wheel carnival (the same analogy adapted to the two elements 2a, 2b together would give two respective nacelles of two different fairground wheels rotating in respective opposite directions, hourly and counterclockwise).
  • said trajectory may be substantially oval, or of rectangular, square, triangular shape, of the shape of other regular polygons or irregular polygons, or of the shape of other closed curvilinear curves.
  • each of said two elements 2a, 2b has a respective substantially straight elongate shape which extends longitudinally along a (same) main extension direction C.
  • said flattening device 13 comprises two plate-like pieces 9a, 9b (that is, each piece 2a, 2b advantageously forms a respective plate), each of said two elements 2a, 2b being formed by a respective edge of one of said substantially plate-shaped pieces 9a, 9b (respectively).
  • each of said two elements 2a, 2b is in one piece, that is to say integrally, with a different (that is to say respective) of said two parts 9a, 9b.
  • each of said two elements 2a, 2b is attached, that is to say added, glued or fixed, with a different (that is to say respective) of said two parts 9a, 9b.
  • each of said two pieces 9a, 9b is in the form of a plate forming a quadrilateral, which is more preferably a rectangle or a square.
  • said two edges respectively formed by said two elements 2a, 2b are the respective lower edges of said two parts 9a, 9b.
  • said two substantially plate-shaped pieces 9a, 9b are planar, i.e. each has a respective width, length and thickness, said respective thickness being much smaller than said length and width. respectively.
  • said respective thickness is less than one-tenth of said respective width and less than one-twelfth of said respective length.
  • said two edges are rounded, that is to say convex, to avoid degrading said flexible membrane 12 to its contact.
  • said two substantially plate-shaped pieces 9a, 9b extend substantially in the same plane P.
  • the respective lengths and widths of said two pieces 9a, 9b extend in a same plane P which passes by said main extension direction C.
  • the figure 2 illustrates front of said flattening device 13 of flexible membrane 12 alone, said two elements 2a, 2b being arranged side by side.
  • the respective displacements of said two elements 2a, 2b are at least partly symmetrical so that said two elements 2a, 2b come simultaneously and intermittently press said membrane 12 against a support 1 while moving away one on the other hand to locally stretch said membrane 12.
  • said two elements 2a, 2b advantageously perform respective cyclic displacements which are symmetrical to each other during at least a portion of their respective cycle, and said two elements 2a, 2b are in contact with said membrane 12 to press against said support 1 for part or all of the duration of these respective symmetrical displacements.
  • Said membrane 12 is stretched locally, that is to say preferably on only a portion of its surface, even more preferably a portion (or two half-portions) substantially elongate (s) and / or rectilinear (s) (and or aligned) of said surface.
  • said two elements 2a, 2b during (at least a part) of their respective displacements in cyclic translation, locally press a portion (where they each each locally press a respective half-portion) substantially elongated surface of said membrane 12.
  • said two elements 2a, 2b move in two respective directions opposite to each other.
  • said two elements 2a, 2b are arranged to stretch said membrane 12 in at least a first direction of stretch E.
  • said first stretching direction E is substantially parallel to said main extension direction C.
  • said elements 2a, 2b move away from each other in said main extension direction C and / or said first stretching direction E.
  • said two elements 2a, 2b are substantially identical and have respective displacements completely symmetrical. Said two elements 2a, 2b then advantageously press said membrane 12 against said support 1 for only part of their respective symmetrical displacements.
  • figure 7 said two elements 2a 2b move away from each other, while applying a certain pressure on said membrane, thereby stretching it to remove the folds, said pressure decreasing as said two elements 2a , 2b continue to move away from each other to the point that they lose contact with said membrane 12, thus avoiding degradation thereof.
  • Said support 1 against which said two elements 2a, 2b come to press said membrane 12 can be of any type capable of supporting said flexible membrane 12.
  • it has a substantially flat surface, locally flat, concave, convex, or corresponding to the outer surface of a cylinder, the latter example being illustrated in particular in FIG. figure 1 .
  • said first stretching direction E is substantially perpendicular to a conveying direction H in which a driving means 4 moves said membrane 12 relative to a fixed frame 22 on which said support 1 is intended to be mounted.
  • said frame 22 may be any type of structure preferably immobile with respect to the ground, in particular an industrial tannery machine.
  • said flattening device 13 of flexible membrane 12 is also mounted on said fixed frame 22.
  • said conveying direction H is substantially perpendicular to said main extension direction C.
  • Said drive means 4 is advantageously designed to support said membrane 12 and to drive it along said conveying direction H.
  • said flattening device 13 is advantageously integrated into an assembly further comprising a slitter 14 and a flexible membrane introduction system 15 introducing said membrane 12 to the inlet of said slitter 14.
  • said introduction system 15 supplies said slitter 14 with a flexible membrane 12.
  • said frame 22 is constituted by a fixed part with respect to the ground of said introduction system 15.
  • the flattening device 13 is thus mounted on a fixed portion relative to the ground of said introduction system 15, which is itself substantially fixed relative to the ground.
  • said frame 22 may be constituted by said slitter 14 and in particular a fixed part thereof.
  • said slitter 14 is in particular provided with a slitting blade 16 for slitting said membrane 12, and two rollers 4 in the form of cylinders designed to pass said membrane 12 between them, resulting in this last in said conveying direction H, and exerting if necessary a pressure on said membrane 12.
  • said rollers 4 constitute said drive means 4 of said membrane 12.
  • Said membrane introduction system 12 advantageously comprises at least one means 5 for conveying said membrane 12 to said slitter 14.
  • Said conveying means 5 is for example a conveyor belt 5, or, as shown in FIG. figure 1 , two conveyor belts 5, which preferably face each other and between which said membrane 12 is conveyed towards said slitter 14.
  • said introduction system 15 conveys said flexible membrane 12 to said drive means 4 of said slitter 14, which will itself cause said membrane 12 to be slit, said slitting blade 16.
  • the device of lying flat 13 is here positioned downstream of said introduction system 15 and upstream of said slitter 14, so as to lay said flexible membrane 12 at its exit from said conveying means 5 and just before passing through said drive means 4, which is, in the illustrated example, formed by said two rollers 4.
  • a portion of one of said rollers preferably a portion cut longitudinally in one of said rollers 4, preferably a roll positioned below the other, forms the support 1 against which said elements 2a, 2b press said membrane 12.
  • said conveying means 5 of said introduction system 15 may constitute, in a non-illustrated embodiment, said means for driving said membrane 12 in a conveying direction H perpendicular to said first direction of stretch E.
  • said flattening device 13 of flexible membrane 12 comprises traction means 4 'of said membrane 12 in a traction direction T perpendicular to said main extension direction C of said two elements 2a, 2b, said means of traction 4 'cooperating with said elements 2a, 2b to stretch said membrane 12 in said traction direction T.
  • said traction direction T is parallel to said conveying direction H, and said traction means 4 'are formed by said drive means 4.
  • said membrane 12 is then also stretched, according to said conveying direction H, between said drive means 4, (preferably formed by said two rotary rollers 4), and said two members 2a, 2b (i.e. the place where said membrane 12 is pressed between said two elements 2a, 2b and said support 1).
  • said membrane 2a, 2b is preferably laid flat along said conveying direction H and said first direction of stretching E, said conveying direction H and said first direction of stretching E being substantially perpendicular.
  • said flexible membrane 12 has a length and a width, said width being for example smaller than said length.
  • said drive means 4 drives said membrane 12 in the direction of the length of said membrane 12.
  • said flexible membrane 12 allows in particular, in the present example, to obtain larger areas of slit membranes (a flexible membrane at the inlet of a slitter gives two membranes slit at the outlet of the slitter).
  • This is particularly interesting from an economic point of view, particularly in the field of industrial tannery, since the flexible split membranes, and in particular the split animal skins, are bought by the piece and sold on the surface.
  • said kinematic chain 7 converts the rotation of the motor shaft 6 into a circular movement of said first element 2a.
  • said flattening device 13 also comprises a first intermediate body 8a, a first 2a of said two elements 2a, 2b being freely pivotally connected to said first intermediate body 8a along a first axis of rotation A.
  • said driving shaft 6 is connected to said first intermediate body 8a to rotate it along a second axis of rotation A 'which is parallel and offset from said first axis of rotation A.
  • said first intermediate body 8a is substantially flat in shape having a first geometric center, and at least one of said first A and second A 'axes of rotation is offset from said first geometric center.
  • the first A and second A 'axes of rotation are both offset from said first geometric center, and are offset with respect to each other.
  • said first intermediate body 8a is of circular, oval or polygonal shape such as a square, a triangle or a rectangle.
  • the actuator 11 is an electric geared motor offset from said elements 2a, 2b, for example above them, and provided with a motor output shaft 6, itself connected to a first toothed wheel 17 having even axis around which is positioned a transmission belt 18.
  • Said transmission belt 18 is also positioned around a second toothed wheel 19, so as to transmit to it the rotational movement of said first toothed wheel 17.
  • said first toothed wheel 17 has a greater diameter than said motor shaft 6, and said second toothed wheel 19 has a larger diameter to said drive shaft 6 and less than said first toothed wheel 17.
  • Said second toothed wheel 19 sees its hub extended by an output shaft 20 which itself is connected to said first intermediate body 8a along an axis parallel to said second axis of rotation A '.
  • a rotational movement of said second toothed wheel 19 causes a rotational movement of its output shaft 20, which itself causes a rotational movement of said first intermediate body 8a, the latter then driving said first element 2a in an elliptical translation movement, or even more preferably in circular translation, in the manner of a nacelle in a large fairground wheel, said first intermediate body 8a playing the role of the large wheel in rotation.
  • Said kinematic chain 7 thus comprises in this example all the elements between said driving shaft 6 and said first element 2a.
  • said flattening device 13 also comprises a second intermediate body 8b, a second 2b of said two element 2a, 2b being freely pivotally connected to said second intermediate body 8b according to a third axis of rotation A ".
  • said second intermediate body 8a is substantially flat in shape having a second geometric center, and at least one of said third A “and fourth A '" axes of rotation is offset from said second geometric center.
  • the third A "and fourth A '" axes of rotation are both offset from said second geometric center.
  • said second intermediate body 8a is of circular, oval or polygonal shape such as a square, a triangle or a rectangle.
  • said first intermediate body 8a cooperates with said second intermediate body 8b to convert a rotational movement of said first intermediate body 8a into a rotational movement of said second body intermediate 8b. More preferably, the direction of rotational movement of said second intermediate body 8b is opposite to the direction of rotational movement of said first intermediate body 8b.
  • said first intermediate body 8a is cooperating with said second intermediate body 8b to rotate it along a fourth axis of rotation A '"offset and parallel to said first A, second A' and third A '" axes of rotation.
  • said two intermediate bodies 8a, 8b cooperate mechanically with each other, so that the rotation of one in a clockwise direction causes rotation of the other in a counterclockwise direction, and / or vice versa.
  • said two intermediate bodies 8a, 8b are connected to a gear or a gear train ensuring the transmission of the rotational movement of one of said two intermediate bodies 8a, 8b.
  • each of said two intermediate bodies 8a, 8b is connected to a toothed wheel (of the same size or not, in the latter case one of said two wheels will be a pinion), said two gears being in contact with each other. the other to transmit the power by obstacle or via a transmission belt.
  • said flattening device 13 comprises another actuator which is also provided with a rotary motor shaft which is connected to said second intermediate body 8b to rotate it along said fourth axis of rotation A '' ', of the same way and with the same organs as those described above for rotating the first intermediate body 8a.
  • said two intermediate bodies 8a, 8b move in rotation independently of one another.
  • said two elements 2a, 2b each move in an elliptical translation movement (preferably a circular translational movement) respectively cyclic in phase opposition with each other.
  • an elliptical translation movement preferably a circular translational movement
  • the other performs an elliptical translation movement (preferably a movement of circular translation) respectively in a symmetrical clockwise direction.
  • said two elements 2a, 2b are arranged side by side, one being located to the left (which will be called left element 2b) and the other rather to the right (2a), and thus, when said membrane 12 is positioned below said elements 2a, 2b, against said support 1 itself located below said membrane 12, said right-hand element 2a performs an elliptical translation movement (preferably a respective circular translation movement) in a counterclockwise direction, and said left-hand element 2b performs an elliptical translation movement (preferably a circular translational movement) respectively in a clockwise direction.
  • said two substantially plate-shaped pieces 9a, 9b are arranged side by side, each having an inner upper corner 10a, 10b respectively, said two inner top corners 10a, 10b being adjacent to one of the other, and each of said two inner top corners 10a, 10b being connected to a different (and respective) of said two intermediate bodies 8a, 8b.
  • Such a configuration is particularly advantageous in the case where said first intermediate body 8a is connected to said second intermediate body 8b.
  • said flattening device 13 of flexible membrane 12 further comprises at least two cheeks 21 between which are interposed said parts 9a, 9b to maintain the latter in said plane P, while allowing their respective displacement in said plane P.
  • said flattening device 13 of flexible membrane 12 comprises at least a first guide conformation 23 (respectively) integral with one of said two parts 9a, 9b (or both), and at least a second conformation of guide 3a, 3b (respectively) integral with one of said cheeks 21 (or both), said first 23 and second 9a, 9b (respective) guide conformations cooperating to guide the (respective) displacement in cyclic translation of one of said two elements 2a, 2b (or both).
  • said first guide conformation 23 may be a female part comprising a hole 23 made in said part 9a, 9b
  • said second guiding conformation 3a, 3b may be a male part comprising a protuberance 3a, 3b which extends substantially perpendicularly to the plane P in which said part 9a, 9b fits, said protrusion being for example a roller 3a, 3b.
  • Said male part is preferably designed to correspond to said female part.
  • said roller 3a, 3b is designed to fit into said slot 23 and to follow the edge thereof so as to guide the respective displacement in cyclic translation of said two pieces 9a, 9b and thus of said elements 2a, 2b, the drawing of said edge of said light 23 substantially corresponding to the path (respectively) describing a closed curve (respectively) of each of said elements 2a, 2b.
  • Said two elements 2a, 2b, said two intermediate bodies 8a, 8b, said support 1, and said two plate-like parts 9a, 9b may for example be made of metal, in particular stainless steel, another metal or an alloy but also plastic, wood, rubber or plastic.
  • metal in particular stainless steel, another metal or an alloy but also plastic, wood, rubber or plastic.
  • the invention also relates to a method of flattening flexible membrane 12, of the kind piece of animal skin. Said method is preferably implemented using the device described above, but may also be implemented by other means without departing from the scope of the invention.
  • the foregoing description concerning the flattening device 13 is therefore valid, mutatis mutandis , for the method according to the invention.
  • said method of flattening flexible membrane 12 comprises at least one primary stretching stage, preferably in a first stretching direction E, in which at least two elements 2a, 2b each move in translation. cyclic according to a respective path describing a respective closed curve, said respective displacements in cyclic translation of said two elements 2a, 2b being at least partly symmetrical so that said two elements 2a, 2b come simultaneously and intermittently press said membrane 12 against a support 1 while moving away from each other to locally stretch said membrane 12, preferably in said first stretching direction E.
  • both elements 2a, 2b advantageously carry out respective cyclic displacements which are symmetrical to each other during at least a part of their respective cycle, and said two elements 2a, 2b preferably come into contact with said membrane 12 to press it against said support 1 for part or all of the duration of these respective symmetrical displacements.
  • said two elements 2a, 2b preferentially come into contact with said membrane 12 and then press it simultaneously against said support 1, then " slide " on the surface of the membrane 12 to stretching and removing the folds while moving away from each other, before moving away from the latter and / or no longer exert pressure on it.
  • the two elements 2a, 2b are preferably in contact with and / or in pressure of said membrane 12 during substantially the same time interval, and press said membrane 12 only intermittently, c that is, during a fraction of the period of the respective cyclic translation displacement of each of said two elements 2a, 2b.
  • Said membrane 12 is advantageously stretched locally during the primary stretching step, that is to say preferably on only a portion of its surface, still more preferably a portion (or two half-portions) substantially elongated (s). ) and / or rectilinear (and / or aligned) of said surface.
  • said two elements 2a, 2b during the primary stretching step (more specifically during at least a portion of their respective cyclic translation displacements), locally press a portion (or they each press locally a respective half-portion) substantially elongated from the surface of said membrane 12.
  • the membrane (12) is advantageously locally stretched in a first direction of stretching (E).
  • each of said two elements 2a, 2b has a respective substantially straight elongate shape which extends longitudinally along a (same) main extension direction C.
  • said membrane 12 is displaced relative to a fixed frame 22 on which said support 1 is mounted, according to a conveying direction H substantially perpendicular to said main extension direction C.
  • said membrane 12 is moved continuously relative to said frame 22 while said two elements 2a, 2b move themselves continuously in translation. respective cyclic (i.e. each of the two elements 2a, 2b moves in a respective cyclic translation).
  • the method according to the invention comprises a secondary stretching step, where the stretching of the membrane 12 is preferably carried out in a second direction of stretching F substantially perpendicular to said first direction of stretching E, in which, while said two elements 2a, 2b press locally said membrane 12, a tensile force is exerted on said membrane 12 in a traction direction T substantially parallel to said second stretching direction F.
  • This secondary stretching step in combination with the primary stretching step preferably in said first direction of stretching E, complements the flattening of said membrane 12.
  • the secondary stretching step preferably in said second direction of stretching F, is substantially concomitantly with the stretching step according to said first stretching direction E.
  • the step of stretching secondary stretching is wholly or partly done just before or just after the primary stretching step, preferably in said first direction of stretching E) and in particular at the moment where said two elements 2a, 2b locally press said membrane 12 against said support 1.
  • Such a method of proceeding is of economic interest, particularly in the field of industrial tannery animal skins. Indeed, said skins arrive folded, re-saturated and inflated, and said flattening method provides a skin area as large as possible by unfolding said skin at best, and it is purchased by the piece and sold to the surface.
  • said traction direction T is parallel to said conveying direction H, and in that the tensile force and the displacement of the membrane 12 (preferably of the animal skin component kind) are provided by one and the same way 4.
  • said second direction of stretching F is substantially parallel to said conveying direction H.
  • said drive means 4 comprises at least one rotary roller 4 frictionally driving said flexible membrane 12.
  • said drive means 4 is formed by two rotary rollers 4, for example made of rubber, which make advantageously part of an industrial tannery machine, for example a slitter 14 or an introduction system 15.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
EP18157727.1A 2017-02-20 2018-02-20 Vorrichtung zum flachen ausbreiten einer flexiblen membran Active EP3363916B1 (de)

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Application Number Priority Date Filing Date Title
FR1751345A FR3063086B1 (fr) 2017-02-20 2017-02-20 Dispositif de mise a plat de membrane souple

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EP3363916A1 true EP3363916A1 (de) 2018-08-22
EP3363916B1 EP3363916B1 (de) 2020-01-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022047656A1 (zh) * 2020-09-01 2022-03-10 太仓市世纪港制衣有限公司 一种用于人造皮革的绘图桌

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090799A (en) * 1910-08-31 1914-03-17 Giovanni Battista Mario Spigno Process for the treatment of hides and skins.
DE4214937A1 (de) * 1991-05-07 1992-11-12 Rotopress Spa Querspanneinrichtung zum zufuehren von bahnfoermigem material, insbesondere von tierhaeuten oder aehnlichem an eine fertigungsmaschine
US6698255B1 (en) * 2002-12-12 2004-03-02 Rainer Dorstewitz Rotation hoop knife splitting machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090799A (en) * 1910-08-31 1914-03-17 Giovanni Battista Mario Spigno Process for the treatment of hides and skins.
DE4214937A1 (de) * 1991-05-07 1992-11-12 Rotopress Spa Querspanneinrichtung zum zufuehren von bahnfoermigem material, insbesondere von tierhaeuten oder aehnlichem an eine fertigungsmaschine
US6698255B1 (en) * 2002-12-12 2004-03-02 Rainer Dorstewitz Rotation hoop knife splitting machine

Cited By (1)

* Cited by examiner, † Cited by third party
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WO2022047656A1 (zh) * 2020-09-01 2022-03-10 太仓市世纪港制衣有限公司 一种用于人造皮革的绘图桌

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EP3363916B1 (de) 2020-01-08
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