EP2625127A1 - Section d'enroulement pour production automatisée de rouleaux de sacs - Google Patents

Section d'enroulement pour production automatisée de rouleaux de sacs

Info

Publication number
EP2625127A1
EP2625127A1 EP11773847.6A EP11773847A EP2625127A1 EP 2625127 A1 EP2625127 A1 EP 2625127A1 EP 11773847 A EP11773847 A EP 11773847A EP 2625127 A1 EP2625127 A1 EP 2625127A1
Authority
EP
European Patent Office
Prior art keywords
winding
band
spindle
rotation
way
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11773847.6A
Other languages
German (de)
English (en)
Other versions
EP2625127B1 (fr
Inventor
Luciano Conti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amutec SRL
Original Assignee
Amutec SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amutec SRL filed Critical Amutec SRL
Publication of EP2625127A1 publication Critical patent/EP2625127A1/fr
Application granted granted Critical
Publication of EP2625127B1 publication Critical patent/EP2625127B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/2207—Changing the web roll in winding mechanisms or in connection with winding operations the web roll being driven by a winding mechanism of the centre or core drive type
    • B65H19/2215—Turret-type with two roll supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/10—Mechanisms in which power is applied to web-roll spindle
    • B65H18/106—Mechanisms in which power is applied to web-roll spindle for several juxtaposed strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/26—Cutting-off the web running to the wound web roll
    • B65H19/267—Cutting-off the web running to the wound web roll by tearing or bursting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41425—Starting winding process involving blowing means, e.g. air blast
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B65H2301/4149—Winding slitting features concerning supply of cores
    • B65H2301/41496—Winding slitting features concerning supply of cores loading pre-arranged set of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/418—Changing web roll
    • B65H2301/4185—Core or mandrel discharge or removal, also organisation of core removal
    • B65H2301/41852—Core or mandrel discharge or removal, also organisation of core removal by extracting mandrel from wound roll, e.g. in coreless applications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/418—Changing web roll
    • B65H2301/4185—Core or mandrel discharge or removal, also organisation of core removal
    • B65H2301/41856—Core or mandrel discharge or removal, also organisation of core removal by stripping core from mandrel or chuck, e.g. by spring mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/191—Bags, sachets and pouches or the like

Definitions

  • the present invention refers to the technical field relative to the machines suitable for the production of plastic bags and sacks.
  • the invention refers to an innovative device for the automation applied to the production of plastic sacks wound on cores.
  • the roll thus realized is composed of a continuous band formed by a succession of bags subdivided one from the other by a perforation line of a pre-determined pitch.
  • the continuous band is generally wound around the said cylindrical core, axially holed, in such a way that the roll can be subsequently arranged in a rotatable manner on the axis of a distributor. In such a way, the user can easily unroll a bag and detach it from the remaining roll by applying a traction that causes the tear along the perforation line.
  • Such types of bags are very common and frequently used in the food industry, for example, in supermarkets in order to put fruit or other food products into a bag.
  • the production line of such rolls of bags includes an unwinding section by means of which a continuous plastic band is unrolled from a mother reel.
  • the mother reel can have a width variable on the basis of the number of rolls that want to be produced and generally superior to the meter so as to be able to obtain at the same time even four or more rolls.
  • a longitudinal cutting and welding section is arranged in succession to the unwinding section in such a way that the band unwound from the mother reel is subdivided into many tracks, welded laterally and bent centrally. In such a manner, starting from a single band of a pre-determined width, a plurality of continuous bands of inferior width is formed.
  • the perforation section is included, which creates the tear line between a bag and the subsequent one along the band formed.
  • such a section includes the intervention of an operator who arranges manually on a spindle a plurality of cores on which the bands will be re-wound.
  • the operator must subsequently arrange manually the spindle in the machine and remove it as soon as the winding has been completed. Then, the operator will have to remove manually the rolls produced and arrange a new spindle in such a way as to begin a new winding.
  • the winding section (1) comprises:
  • - Tear means (60, 60', 61, 61', 150) configured to cause the tear of the band (100) in correspondence of the completion of a winding and facilitate the beginning of a subsequent winding.
  • the winding device (10) includes a support (11) rotatable around a longitudinal axis (12) and provided with at least a first (16) and a second spindle (17) connected to the support (11) in a rotatable manner around their longitudinal axis, for realizing the winding of the roll in formation, and being further sliding axially between an extended position, wherein they result emerging from the support (11) in a substantially orthogonal manner to it to realize the winding, and a retracted position.
  • the winding section (1) further comprises:
  • a movement system (50, 51, 55, 100) .
  • the controlling movement system (50, 51, 55, 100) is synchronized in such a manner that when it conducts a spindle (16, 17) in rotation in extended position to complete a first winding of a roll in formation, it moves the second spindle back from the extended position to the retracted position.
  • the roll formed eventually present on such a spindle, automatically falls, while, at the same time, the spindle itself results already arranged to load new cores for a new winding.
  • the controlling movement system now controls the rotation of the loader (3) to bring it in axis with the said retracted second spindle.
  • the subsequent extraction of such a second spindle spears the cores arranged on the loader and arranges it for the new winding.
  • the controlling movement system controls the moving apart of the loader (3) in such a way that, in proximity of the completion of the first winding, it can activate the subsequent rotation of the whole support (11) around its axis (12) and that causes an inversion of position between the two spindles (16, 17) .
  • the second spindle placed in rotation first or during such a rotation of inversion, now intercepts the feed path for the band (200) and, after the tear of the band with the said tear means, begins a new winding on the cores.
  • the controlling movement system now controls the retroaction of the first spindle conducted by the support in the loading and unloading position previously occupied by the other spindle, so as to cause the fall of the rolls formed.
  • FIG. 2 shows a lateral view of the axonometry of figure 1;
  • FIG. 3 shows an overall axonometric view of the winding device 10 belonging to the present winding section 1;
  • FIG. 4 shows an axonometric view of the whole winding section 1 provided with carter or frames 2 with a longitudinal axis of the section highlighted with a dotted line;
  • FIG. 5 shows in an axonometric view a detail of the core loader as arranged in axis with the spindle;
  • FIG. 6 shows the same axonometric view wherein the core loader is instead rotated out of axis with respect to the spindle;
  • FIG. 7 shows in an axonometric view a detail of the device of longitudinal movement of the spindles
  • FIG. 8 and 9 show in a lateral view a longitudinal section (plane belonging to the longitudinal axis) of the whole machine of figure 4;
  • FIG 1 it is represented, in an axonometric view, a part of the winding section 1 for the formation of a continuous roll of bags in accordance with the invention.
  • the other part as better explained below, has been omitted here just for the sake of the purposes of descriptive clarity of the drawings, since it is substantially identical.
  • Figure 1 therefore represents a support frame 2 for the mechanical winding elements, that is a loader 3 and a winding device 10 best visible in figure 3.
  • FIG 1 it is highlighted the loader 3 closed on one of its ends by means of a base 3' and into which the cores 4 are placed for the winding, which result arranged extended in a piled up manner one on top of the other.
  • the base 3' thus impedes the fall by gravity of the cores contained into it.
  • Figure 2 shows a frontal view relative to the axonometry of figure 1 in order to better highlight the core loader 3 with the closure 3' .
  • the loader is mounted oscillating around a rotation axis 150 supported by the frame 2.
  • the oscillation is obtained by means of the extraction/retraction of an actuator 55 (see figure 2 or figure 8 and figure 9) .
  • the loader 3 includes a sling 60 provided with the said rotation axis 150 and into which one or more binaries for piling up the cores 30 are fixed.
  • a sling 60 provided with the said rotation axis 150 and into which one or more binaries for piling up the cores 30 are fixed.
  • four binaries are included in such a way as to realize four winding tracks, as better clarified in the present description below.
  • Figure 1 and figure 2 further highlight a rotative device 10 (better highlighted in an axonometric view of figure 3) comprising two discs 11 connected in a rotatable manner by a shaft 12.
  • a disc 11 is arranged with respect to the frame 2 in a rotatable manner around the central rotation axis 12.
  • the central rotation axis as better shown in figure 3, is a shaft 12 that is connected rigidly to a further opposed disc 11 and in turn supported by its own support frame 2. In such a manner, with a single motorization a disc 11 can be activated capable of dragging in rotation also the disc 11 opposed by means of the shaft 12.
  • Figure 4 better highlights an overall view with the said frames 2 to which the respective rotative devices 10 are connected.
  • the two discs 11 include each one of them a first winding element 13 and a second winding element 14 arranged in such a way as to result symmetrical according to a central symmetry with respect to the shaft 12 of rotation of the disc.
  • the winding element 13 and the winding element 14 comprise respectively a disc 13' and a disc 14' mounted fixed on the disc 11.
  • the disc 13' supports a spindle 16 on which cores 4 can be loaded, as the disc 14' mounts a spindle 17 on which cores 4 can be loaded for the winding, as will be better described in detail in the functioning below.
  • the spindles (16, 17) are mounted in both a rotatable manner and an axially sliding manner with respect to their support disc (13'; 14') in such a way that an appropriate actuation system (50, 51) can control their longitudinal extraction and retraction, while a motorization 100, better described in detail below, controls their rotation around their connection axis .
  • Figure 3 highlights well the spindle 17 belonging to the disc 14' completely retracted while, in contrast, the spindle 16 belonging to the disc 13' results extended.
  • Figure 1 the lateral view of figure 2 and the axonometric detail of figure 5, therefore, depict a functioning condition wherein the loader is oscillated in a position wherein the cores are perfectly in axis with the spindle 17.
  • the cores extended in the loader are driven in the spindle itself like a ring to the finger.
  • the spindle is for that purpose of the expansion type so as to block on it the cores speared.
  • the axonometric view of figure 6 better highlights the subsequent phase wherein the spindle 17 has been extracted, consequently spearing the two cores 4 while, subsequently, the loader has been rotated in retracted position around the axis 150.
  • figure 5 represents in fact just two tracks 30 speared from the spindle belonging to a disc 11, but it is to be intended that a disc 11 opposed is included and from which another 17 exits to spear the cores arranged in the other two tracks 30 omitted in such a figure.
  • figure 7 and figure 3 highlight the control system of the extraction and the retraction of the spindles (16, 17) .
  • a sliding bar 50 is highlighted on which a sliding block 51 results mounted slidingly.
  • the sliding block includes a grasping system (for example plier-like) with which to grasp the corresponding spindle when, after the rotation of the disc 11, this is arranged in axis with it.
  • Figure 3 in fact shows the grasping phase of a spindle (in this case the spindle 17) which has been retracted with the backward motion of the sliding block 51.
  • the rotation of the two spindles 16 and 17, as also the rotation of the central shaft 12 and therefore of the two discs 11, is controlled by an appropriate motorization system 100 by which each element can rotate in an absolutely independent manner from the other.
  • Figure 3 in fact highlights two motors 110 per part (preferably of the "brushless” type) and just one ratiomotor 120 which, by means of transmission belts and pulleys, transmit the rotation to the said elements in an independent manner.
  • two belts 400 and 410 per part connect each one respectively the central axis 12 to a spindle (16, 17), thus controlling their rotation around their axis.
  • two pulleys are used that are mounted idle on the axis 12 and connected by means of the said belts each one to a pulley arranged on the disc 11 and integral to a spindle in such a way that a rotation can be transmitted from the motors to the spindles independently from the rotation of the shaft 12.
  • the fact that the said pulleys are mounted idle on the axis 12 implies that the rotation of the spindles continues undisturbed independently from the rotation itself of the shaft 12. In such a manner, their rotation continues undisturbed also during the rigid rotation phase of the disc 11 around its axis 12, allowing to continue the winding also during the exchange.
  • the ratiomotor 120 by means of the shaft 130 and the belts 420 and 430, allows to vary, according to the need, the speed of rotation of the spindles (16, 17), which are absolutely independent one from the other.
  • the first belt 440 controls the rotation of the shaft 12.
  • the winding section 1 further comprises appropriate tear means (60, 60', 61, 61', 150) which, once a winding around one of the two spindles is finished, allow the tear of the band 200 and, at the same time, the beginning of a new winding around the second spindle arranged in stand-by position.
  • the said tear means therefore comprise a pressing element (60, 60') and a counter-pressing element (61, 61') constituted each of them by a roller (60; 61) mounted in a rotatable manner around an arm (60'; 61'). Both the arm 60' and the arm 61' are in turn hinged in such a way that pressing element and counter-pressing element result oscillating.
  • Figures 8 and 9 in fact show a succession wherein the pressing element (60, 60') is rotated clockwise to intercept the path of the band 200, while, at the same time, the counter-pressing element also rotates clockwise to increase the tension on the band.
  • the combined action of the pressing element and the counter-pressing element induce a tension on the band that causes the tear.
  • rollers of the pressing element and the counter- pressing element are assembled idle on respective arms with a certain degree of mechanical resistance to the rotation as to induce the said tension on the band 200.
  • An air blow 250 is arranged integral to the pressing element in such a way that when the tear took place the air maintains the band against the spindle to begin a new winding (see for example figure 12) .
  • a flexible pipe connected to the pressing element can be used, provided with a nozzle on one side and connected to a compressed air source on the opposite side.
  • Figure 10 shows a normal winding phase of the band 200 by means of the rotation of the spindle 17 on which the cores 4 are arranged.
  • the spindle 16 is loaded with other cores 4 and remains in stand-by position so as not to interfere with the winding.
  • the loader 3 is rotated externally to the disc in a rest position, as well as the pressing element 60, in such a way as not to interfere with the winding.
  • Figure 10 also shows, for further descriptive clarity, a lateral view of the same disc 11.
  • a lateral view is however rotated of 90° anti-clockwise with respect to its frontal view in such a way as to highlight well the two spindles.
  • the spindle 16 is placed in rotation around its axis while, at the same time, the rotation of the disc 11 around its axis 12 is activated in such a way as to invert the position of the spindles.
  • Such an inversion phase is clearly schematized in subsequent figure 11 and highlights a rotation of 180° of the disc 11 around its rotation axis 12.
  • the two spindles exchange their position, allowing the beginning of the tear phase.
  • the two spindles rotate together at an appropriate speed.
  • the tear phase is realized with the pressing element and the counter-pressing element which are appropriately rotated in such a way that the pressing element gets in contact against the new spindle 16, while the counter- pressing element tensions further the band.
  • a clockwise rotation of the pressing element is included that brings it in contact against the new spindle 16 which rotates around its axis with a tangential speed that coincides with the advancing speed of the band.
  • the counter- pressing element rotates clockwise in such a way as to pull further the band 200.
  • the combination of the contact of the pressing element against the band that slips on the new spindle 16 and the displacement of the counter- pressing element generate the sufficient tension for the tear .
  • the pressing element continues to maintain the contact against the spindle 16 for the sufficient fraction of time so as to force the head 90 of the band to wind around the spindle 16 in rotation, in particular around the cores 4 fixed to the said spindle.
  • the air blow 250 arranged integral to the pressing element 60, facilitates the beginning of the new winding, forcing the head 90 of the band to remain in adherence against the spindle in rotation.
  • Subsequent figure 12 shows the roll formed provided with the tail 80 of the band broken and the head 90 of the band that begins to wind on the core 4, arranged in rotation on the spindle 16.
  • FIG 13 and figure 14 show the subsequent phases wherein the new winding has begun and at the same time the unloading of the rolls just formed takes place.
  • Such an unloading phase includes, thanks to the independent motors used, the stop of the rotation of the spindle 17 and the subsequent longitudinal retroaction of the spindle 17 by means of the sliding block 51, sliding on the guide 50 of figure 3.
  • the retroaction of the spindle 17, as shown in figure 14, therefore causes the fall of the rolls formed which are, for example, collected by an appropriate mobile unloading platform 70.
  • figure 15 shows an anti-clockwise rotation of the loader 3 which brings the cores in axis with the spindle 17.
  • the axis 17 is made to slide longitudinally through the sliding block 51 along the guide 50 in such a way as to spear the cores arranged on the loader in axis.
  • the loader is at this point rotated in rest position, as shown in figure 19.

Abstract

La présente invention concerne une section d'enroulement (1) conçue pour enrouler une bande continue (200) de sacs autour d'un ou de plusieurs mandrins (4). La section comprend un trajet d'avance (200) de la bande, un dispositif d'enroulement (10) servant à enrouler la bande autour du mandrin (4) et des moyens de déchirement appropriés (60, 60', 61, 61', 150) pour déchirer la bande (100) à la fin d'une opération d'enroulement et pour faciliter le démarrage d'une opération d'enroulement ultérieure. Selon l'invention, le dispositif d'enroulement (10) comprend un arbre (12) auquel sont raccordés de manière rigide deux disques rotatifs (11), chacun d'eux comportant une première (16) et une seconde (17) broche. Les broches coulissent toutes les deux axialement par rapport au disque et sont également rotatives axialement pour réaliser l'enroulement d'un rouleau en cours de formation. La section d'enroulement comprend en outre un dispositif de chargement de mandrin mobile (3) et un système de déplacement (50, 51, 55, 100). Le système de déplacement est synchronisé de telle sorte que lorsqu'une broche (16, 17) est en rotation pour réaliser une première opération d'enroulement, la seconde broche est rétractée et le dispositif de chargement est disposé coaxialement avec celle-ci afin qu'elle puisse embrocher les mandrins après son extraction. Ensuite, l'écartement du dispositif de chargement de mandrin mobile (3) est commandé et, lorsque la première opération d'enroulement est presque terminée, le dispositif (10) dans son ensemble est mis en rotation autour de son axe (12), entraînant une inversion de position entre les deux broches (16, 17). La seconde broche extraite est alors mise en rotation de telle sorte que, après l'opération de déchirement, elle entame une nouvelle opération d'enroulement tandis que la première broche est rétractée afin de faire tomber le rouleau formé.
EP11773847.6A 2010-10-08 2011-09-02 Section d'enroulement pour production automatisée de rouleaux de sacs Active EP2625127B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPI2010A000112A IT1402104B1 (it) 2010-10-08 2010-10-08 Una sezione di avvolgimento per la produzione automatizzata di rotoli di buste.
PCT/IB2011/053843 WO2012046151A1 (fr) 2010-10-08 2011-09-02 Section d'enroulement pour production automatisée de rouleaux de sacs

Publications (2)

Publication Number Publication Date
EP2625127A1 true EP2625127A1 (fr) 2013-08-14
EP2625127B1 EP2625127B1 (fr) 2017-07-05

Family

ID=43738235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11773847.6A Active EP2625127B1 (fr) 2010-10-08 2011-09-02 Section d'enroulement pour production automatisée de rouleaux de sacs

Country Status (4)

Country Link
EP (1) EP2625127B1 (fr)
IT (1) IT1402104B1 (fr)
MX (1) MX2013003941A (fr)
WO (1) WO2012046151A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114620521A (zh) * 2022-04-22 2022-06-14 滁州市纳瑞日用品有限公司 用于环保袋生产的换向收卷机构

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Publication number Priority date Publication date Assignee Title
ITMI20131577A1 (it) * 2013-09-25 2015-03-26 Colines Spa Gruppo di motorizzazione di aspi in una macchina di avvolgimento di film plastico
PL3274283T3 (pl) * 2015-03-23 2021-12-13 Roll-O-Matic A/S Urządzenie do nawijania materiału wstęgowego
CN108974505B (zh) * 2018-09-20 2023-07-21 江苏申凯包装高新技术股份有限公司 一种用于包装袋折叠机的卷袋传输装置

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Publication number Priority date Publication date Assignee Title
US3558400A (en) * 1966-11-21 1971-01-26 Steven J Horvath Apparatus and process for making rolls of bags
US3733035A (en) * 1971-03-10 1973-05-15 C Schott Winder
US3782650A (en) * 1972-04-28 1974-01-01 Egan Machinery Co Web winder control
US5941474A (en) * 1996-07-16 1999-08-24 Huntsman Packaging Corporation System, apparatus and method for unloading and loading winder shafts
US5779180A (en) * 1996-10-18 1998-07-14 Fmc Corporation Winder for use with bag-making machine
NL2000854C2 (nl) * 2007-09-12 2009-03-18 Global Factories B V Wikkelinrichting.

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See also references of WO2012046151A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114620521A (zh) * 2022-04-22 2022-06-14 滁州市纳瑞日用品有限公司 用于环保袋生产的换向收卷机构
CN114620521B (zh) * 2022-04-22 2023-10-20 滁州市纳瑞日用品有限公司 用于环保袋生产的换向收卷机构

Also Published As

Publication number Publication date
WO2012046151A1 (fr) 2012-04-12
EP2625127B1 (fr) 2017-07-05
ITPI20100112A1 (it) 2012-04-09
IT1402104B1 (it) 2013-08-28
MX2013003941A (es) 2014-03-12

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