EP1109733B1 - Apparat zum sammeln, verteilen und aufbewahren von flexiblen laminarelementen, insbesondere von industriehäuten - Google Patents

Apparat zum sammeln, verteilen und aufbewahren von flexiblen laminarelementen, insbesondere von industriehäuten Download PDF

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Publication number
EP1109733B1
EP1109733B1 EP99940420A EP99940420A EP1109733B1 EP 1109733 B1 EP1109733 B1 EP 1109733B1 EP 99940420 A EP99940420 A EP 99940420A EP 99940420 A EP99940420 A EP 99940420A EP 1109733 B1 EP1109733 B1 EP 1109733B1
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EP
European Patent Office
Prior art keywords
hides
cylinders
support unit
machine
conveyor belt
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.)
Expired - Lifetime
Application number
EP99940420A
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English (en)
French (fr)
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EP1109733A1 (de
Inventor
Roberto Graffagnino
Giampietro Verza
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Individual
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Publication of EP1109733A1 publication Critical patent/EP1109733A1/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
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/62—Winding or stacking hides or leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/006—Winding articles into rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/28—Feeding articles stored in rolled or folded bands
    • 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
    • B65H2301/419—Winding, unwinding from or to storage, i.e. the storage integrating winding or unwinding means
    • B65H2301/4191—Winding, unwinding from or to storage, i.e. the storage integrating winding or unwinding means for handling articles of limited length, e.g. AO format, arranged at intervals from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/40—Holders, supports for rolls
    • B65H2405/42—Supports for rolls fully removable from the handling machine
    • B65H2405/422—Trolley, cart, i.e. support movable on floor

Definitions

  • the invention present relates to an apparatus for the collection, distribution and storage of flexible laminar elements, in particular of industrial hides, for inserting them in the various production phases of the tanning process.
  • Devices for the stacking of hides of the type above indicated are known, which are adapted to receive and stack the hides on benches or on trestles at the completion of production phases.
  • a device of this type for stacking hides on special trestles is described in the International patent application No W098/43906, which includes a conveyor belt surface for conveying hides and slidably supported on a movable tray to gradually adapt to the height of the pile of hides.
  • a drawback of this type of device is that it is not possible to insert the hides automatically in the operating machines of the different phases of the production.
  • WO-A-91/04214 disclosed an apparatus for processing sheets that encompasses all the features contained in the preamble of claim 1, namely a handling unit mounted on a support unit and including two rollers rotating about substantially parallel axes, a flexible conveyor belt with opposite end portions each attached to a respective roller, a rod-shaped actuating element substantially parallel to the axes of the rollers and located in an intermediate position with respect thereto to act on said conveyor belt and maintain part thereof in unfolded condition.
  • the position of the rod-shaped element is substantially fixed and cannot automatic adapt the unfolded part of the conveyor belt to the working machine to which it is coupled.
  • GB-A-2 107 681 discloses an apparatus for the storage of flat products in an imbricated formation in which a guide rolled is arranged between two winding shafts or cylinders to form a path for a winding band. Also in this prior art the guide roller is stationary and cannot be adapted to provide a support and working surface of variable length for the products to be stored.
  • a general object of the present invention is to overcome the cited drawbacks by providing an apparatus for the collection, distribution and storage of flexible laminar elements, in particular of industrial hides, reliable and simple to operate.
  • a further aim of the invention is to carry out the collection, distribution and storage operations, with a high level of quality in handling the hides, reducing to the minimum the damage of the hides.
  • a particular aim is to reduce to the minimum operators' intervention during the operation of the apparatus by maximizing the quantity of functions carried out automatically.
  • an apparatus for collecting, distributing and storing flexible laminar products, in particular industrial hides during treatment thereof by a working machine that, in accordance with claim 1, comprises a first support unit and a second hide handling unit operatively mounted on said first support unit, said second hide handling unit including two rotating cylinders with substantially parallel axes, a flexible conveyor belt with opposite end portions attached to a respective one of said cylinders and a rod-shaped actuating element substantially parallel to the axes of said cylinders and located in an intermediate position with respect thereto to act on said conveyor belt to maintain part thereof in unfolded condition, characterised in that said first support unit and said second handling unit are provided with releasable connecting means to allow their transfer either jointly or separately from each other, said rod-shaped actuating element being movable parallel to itself, there being provided substantially horizontal guide means to guide the end portions of said rod-shaped element to form a substantially horizontal support and working surface for loading, respectively unloading said flexible laminar products on or
  • two hide distributing/collecting apparatuses 1,1' are placed in operating position in correspondence of a machine M, which carries out an operation of the production cycle of the hides P, for example spraying.
  • One apparatus works as distributor of hides to be treated in the machine M while at the other extremity of the production line of the machine M, the second apparatus, identical to the first, operates as collector of treated hides.
  • the collecting / distributing apparatus 1, illustrated in greater detail in figures 3 and 4 is made of two main parts including, the supporting unit 2 and the handling unit 3, both supported by wheels 4, 5, or by special trolleys allowing displacement in the work area manually or by automatic systems, of the type with magnetic guides.
  • the unit 2 is composed of a support frame 6 with connecting devices 7, 8, 9, 10 to operatively attach the handling unit 3 during the operations performed with the two units 2, 3 joined together.
  • the connecting devices 7, 8 comprise driving means while those on the other side the connecting means 9, 10 have only a support function.
  • the connecting means of one side of the unit 2 are illustrated in detail in figure 8. They include an electric engine 11, or similar driving means, and a reduction gear 12, for transmission of the rotation to a hollow hub 13 with tapered extremity 14.
  • This hub contains internally a quick docking system with radially displaceable spheres 15 which can be pushed in a radial direction by a pin 16 with tapered extremity moved by an hydraulic or pneumatic piston.
  • the device achieves the quick docking with the axis 17, by displacement in the direction of its extremity, once the pin 13 is inserted in its seating. It is thus possible to transmit the rotation motion to the axis 17 of the cylinder 18, supported by the handling unit 3.
  • Both the connecting devices 7, 8 are supported by guides 19, so as to axially move under the action of hydraulic or pneumatic jacks 20, or equivalent means, that allow coupling and uncoupling of the axis 17.
  • the second coupling device 8 is similar to the first one and performs the coupling with the axis of the second cylinder 21 of the handling unit 3.
  • the handling unit 3 supports two cylinders 18, 21, each performing alternatively and reversibly a rolling up and unrolling function of a tape 22, depending on whether it operates as collector or distributor of the hides.
  • the tape 22 is generally made of a continuous fabric that can reach a length of about 300 metres or more, but it can be made of series of tapes or wires placed side by side.
  • the support unit 2 includes also two guides 24, 25 provided with racks on which a carriage 25, provided with wheels 26, 27, 28 rolls.
  • the carriage 25 can move on the guides 23, 24 by means of an electric motor 29.
  • the carriage 25 includes also an actuating element 30 having the shape of a rod positioned horizontally and a stretching element 31 in the shape of a pendulum.
  • the figure 12 illustrates in detail the stretching and actuating element.
  • a frame or trestle 32 is attached to them after the coupling of the two units 2, 3, thus extending the length of the guides 23, 24 so as to create a plate surface S, during unrolling of the tape sufficient to maintain the hides P stretched, which have to be collected or distributed by the same apparatus.
  • This trestle 32, or similar element can also be a part of the operating machine M itself and be anchored to the apparatus 1 only at the moment of the coupling with the machine M.
  • Figures 13a, 13b, 13c show in detail the various phases of the extension of the actuating element 30, which is displaced on the racks by the carriage 25 moved by the motor 29 through a reduction gear.
  • the actuator departs from its backward rest position and arrives at the extended position, for the subsequent distribution of the collected hides in the upper cylinder after activation of the apparatus 1.
  • Figure 13a shows the handling unit 3, with the loaded upper cylinder 18, already inserted in the support unit 3, with the actuating element 30 still retracted.
  • the stretching element 31 is retracted in an upper horizontal position and is maintained in this position by an appropriate automatic control system.
  • the actuating element has reached the foremost final position for distribution of the hides P.
  • the stretching element 31 is released by the lifting device and moves downwards, in the working position, with an inclination optimally set so as to perform both the desired stretching action on the tape 22 and the compensating action during the rolling up of the tape on the lower cylinder 21.
  • the sliding of the tape 22 on the apparatus 1 can occur at variable speed, dependent on the thickness of the hides and on the density at which they are loaded in the superior cylinder. Moreover the feeding speed of the hides in the various machine on which the apparatus 1 can operate can be different.
  • Control is necessary as, for example, in the distribution function of the hides, the advancement speed of the tape must be maintained strictly steady and equal to the speed of the operating machine which is served.
  • the apparatus 1 is provided with an adequate control, not shown in the figures, performing a servo-diameter function: the upper cylinder 18 reduces its diameter, during its gradual unrolling and consequently it must increase its rotation speed to guarantee that the advancing speed remains constant, while the lower cylinder increases its diameter, by rolling up the tape released by the upper cylinder, and must thus reduce its rotation speed.
  • the servo-diameter system is provided with two distinct closed loop controls: a speed control for the upper cylinder 18 and a position control for the lower cylinder 21.
  • the closed loop speed control of the upper cylinder 18, that constitutes through a tension inverter and a three-phase asynchronous motor the drive of the upper cylinder, takes the speed as reference, that is the desired speed that the tape must have, from a first tachymetric device of the phonic wheel, encoder, tachymetric dynamo or similar type, placed on the operating machine to be served.
  • This signal is compared to an analogous feed-back signal coming from a second tachymetric device placed on a roll 35, supported by the trestle 32 and driven in rotation by the tape 22 and detects the actual linear speed.
  • the second control system acts on the lower cylinder 21 and has the function of recovering or releasing the tape, guaranteeing a steady and ideal tension.
  • the closed loop position control which controls the operation of the lower cylinder 21 through a tension inverter and a three-phase asynchronous motor, detects the position reference through an opportune potentiometer, placed on the electric console, producing an exact tension signal.
  • This tension signal corresponds to a given angular position of the stretching element 31.
  • An increase of the reference signal increases the wanted inclination of the stretching element 31 and then the wanted strain of the tape.
  • the feed-back angular signal of the stretching element 31 is obtained by a rotative potentiometric transducer, that produces a tension signal corresponding to the angular position actually taken by the stretching element.
  • the difference between the reference signal of and the feed-back signal produces the error signal, that corrects the rotation speed of the asynchronous motor and consequently of the lower cylinder by acting on the tension inverter, after being appropriately modified by a correcting network to guarantee steady working of the system.
  • the cylinder speed increases or decreases if the stretching element falls or raises, to quickly recover or release the conveyor tape excess and restore the wanted angular position of the corresponding stretching element corresponding to the right tension of the tape itself. In this manner the error is eliminated and the apparatus has a regular, flowing and ready functioning.
  • This solution in accordance with the invention, has the advantage that it is not necessary to detect at every moment the diameters of the two cylinder 18, 21, which is a complicated operation and giving inaccurate results for the upper cylinder, since the presence of the hides inside it makes its surface very irregular.
  • These two controls allow the provision of a precise system, with very satisfactory response times.
  • the coupling means 9, 10 placed on the part of the support unit 2 opposite to that of the first coupling means 7, 8, are provided with an appropriate height regulating means, like hydraulic or mechanical lifting jacks 36, 37, which performs also the centring function of the carpet by raising or lowering theirs pistons, on whose extremity are the seatings of the cylinder hubs 18, 21.
  • an appropriate height regulating means like hydraulic or mechanical lifting jacks 36, 37, which performs also the centring function of the carpet by raising or lowering theirs pistons, on whose extremity are the seatings of the cylinder hubs 18, 21.
  • the apparatus 1 works as follows. It is placed in correspondence of the exit of a machine M performing one of the production phases of the hides P.
  • the hides, going out from the conveyor belt or tape of the machine are laid down smoothly on the tape 22 of the apparatus, in the zone S, which will bring the hides to roll up in spiral around the upper cylinder 18 together with the tape 22, moving with the same speed of the conveyor belt of the machine M.
  • a cylinder 18 loaded with hides is obtained which are wrapped in sequential and tidy way, protected from dust or from other possible contaminations, with the possibility of being stocked in a store or of being sent to following working steps on another machine.
  • the control system regulates the tape speed which is equal to the feeding speed of the hides in the operating machine.
  • the fixed unit 2 allows also a quick rolling up of the whole tape 22 of the cylinder on which the hides wrapped so as, in case a hide stock doesn't complete the cylinder full loading capacity, to easily and rapidly remove the cylinder and stock it in a store, as illustrated in figure 16.
  • the store in fact, can be developed in height and be provided with special codified seatings to receive the cylinder 18 loaded with hides.
  • a computer-based management and handling of the store is easier to accomplish as well as the mechanical handling of the cylinders.
  • the figure 14 and 15 represent two handling units in two different operative situations.
  • the figure 14 shows the case of the lower cylinder 21 having the tape completely wound up around itself, while the upper cylinder 18 has only a few windings of the tape 22 rolled up. This is the condition of the handling unit 3 unloaded and ready to receive the hides when coupled to the support unit 2.
  • the figure 15 shows the opposite situation to the one just described, with the handling unit 3 with the upper cylinder 18 with the tape 22 completely rolled up, and holding in its windings the hides P collected in a preceding working phase on another operating machine, for example at the exit of a drying tunnel.
  • This second situation corresponds to the condition of a loaded handling unit 3, and ready to release the hides, for a following working phase, after coupling to the support unit 2.
  • the figure 16 shows schematically the possibility of placing in a vertical store the cylinders loaded with hides, for a stocking period.
  • This system of temporary storage of the hides has the big advantage of occupying a reduced space and moreover guarantees perfect conservation conditions of the product with regard to possible environment contaminations at a limited cost.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Specific Conveyance Elements (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Refuse Collection And Transfer (AREA)
  • Tents Or Canopies (AREA)

Claims (13)

  1. Vorrichtung zum Sammeln, Verteilen und Lagern biegsamer, laminarer Erzeugnisse, insbesondere industrieller Häute (P), während derer Behandlung mittels einer Arbeitsmaschine mit einer ersten Trägereinheit (2) und einer zweiten Hautbehandlungseinheit (3), die operativ auf dieser ersten Trägereinheit (2) montiert ist, wobei diese zweite Hautbehandlungseinheit (3) zwei rotierende Zylinder (18, 21) enthält mit im wesentlichen parallelen Achsen, einem biegsamen Förderriemen (22) mit gegenüberliegenden Endabschnitten, die jeweils an einen der Zylinder (18, 21) angeschlossen sind und einem pleuelförmigen Betätigungselement (30), das im wesentlichen parallel ist zu den Achsen der Zylinder (18, 21) und angeordnet ist in einer Zwischenposition mit Bezug dazu, um auf den Förderriemen (22) zu wirken, dadurch gekennzeichnet, dass die erste Trägereinheit (2) und die zweite Behandlungseinheit (3) mit lösbaren Verbindungseinrichtungen (7, 8, 9, 10) versehen sind, um deren Förderung entweder gemeinsam oder getrennt voneinander zu ermöglichen, wobei das pleuelförmige Betätigungselement zu sich selbst parallel beweglich ist und im wesentlichen horizontale Führungseinrichtungen (23, 24, 33, 34) vorgesehen sind, um die Endabschnitte des pleuelförmigen Betätigungselements (30) so zu führen, dass der Förderriemen (22) entfaltet und damit ein im wesentlichen horizontaler Träger und Arbeitsplatte (S) geformt ist zum Laden, beziehungsweise Entladen der biegsamen, laminaren Erzeugnisse (P) auf beziehungsweise von der Arbeitsmaschine.
  2. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass jeder der Zylinder (18, 21) verbunden ist mit umkehrbaren Antriebseinrichtungen (11, 11'), die reversibel und alternativ diese Zylinder auf- und abrollen, wobei die biegsamen Fördereinrichtungen (22) alternativ auf- und abgerollt werden.
  3. Vorrichtung gemäß Anspruch 2, dadurch gekennzeichnet, dass die Achsen der Zylinder (18, 21) in einer im wesentlichen vertikalen oder geneigten Ebene angeordnet sind.
  4. Vorrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass jede der Einheiten (2, 3) auf Rädern angeordnet sind, um deren freie Verschiebbarkeit zum Boden zu ermöglichen.
  5. Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass die Trägereinheit (2) und/oder die Behandlungseinheit (2, 3) mit automatischen Bewegungseinrichtungen auf magnetischen Spuren oder ähnlichen Elementen versehen sind/ist zu deren automatischer Förderung in einem gekoppelten oder ungekoppelten Zustand zum folgenden Arbeitstakt oder zum Lagern.
  6. Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die erste Trägereinheit (2) Drehübertragungseinrichtungen (12) zwischen den Antriebseinrichtungen (11) und einer jeweiligen Zylinderachse (17) aufweist, die betätigbar ist während reziproken Eingriffs der Einheiten (2, 3) und lösbar nach deren Trennung.
  7. Vorrichtung gemäß Anspruch 8, dadurch gekennzeichnet, dass Einrichtungen vorgesehen sind zur Einstellung der Höhe vom Boden der lösbaren Verbindungseinrichtungen (7, 8, 9, 10).
  8. Vorrichtung gemäß Anspruch 9, dadurch gekennzeichnet, dass eine Spannvorrichtung (31) vorgesehen ist, um eine vorbestimmte Spannung des Förderriemens (22) in seiner entfalteten Stellung aufrecht zu erhalten.
  9. Vorrichtung gemäß Anspruch 10, dadurch gekennzeichnet, dass mindestens eine der Behandlungseinheiten (2, 3) mit Spür- und verbundenen Erfassungseinrichtungen, Datenerfassungseinrichtungen und Einstellungs- und Steuereinrichtungen versehen ist für die automatische Steuerung der Vorwärtsgeschwindigkeit des Riemens in Abstimmung mit der Maschine (M), an die sie gekoppelt ist.
  10. Vorrichtung gemäß Anspruch 9, dadurch gekennzeichnet, dass die Spüreinrichtungen als optische, phonische Radoder tachymetrische Dynamoeinrichtungen ausgebildet sind.
  11. Vorrichtung gemäß Anspruch 10, dadurch gekennzeichnet, dass die Einstellungs- und Steuereinrichtungen als manuelle Einrichtungen ausgebildet sind.
  12. Vorrichtung gemäß Anspruch 11, dadurch gekennzeichnet, dass die Einstellungs- und Steuereinrichtungen als elektrische oder elektronische des Impuls-Photozellen-Typus ausgebildet sind.
  13. Maschine zur Behandlung von Häuten mit der Vorrichtung gemäß einem der oder mehrerer Ansprüche von 1 bis 12, dadurch gekennzeichnet, dass die horizontalen Führungseinrichtungen (23, 24, 33, 34) an der Maschine selbst befestigt sind.
EP99940420A 1998-09-11 1999-09-10 Apparat zum sammeln, verteilen und aufbewahren von flexiblen laminarelementen, insbesondere von industriehäuten Expired - Lifetime EP1109733B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT98VI000166A ITVI980166A1 (it) 1998-09-11 1998-09-11 Macchina automatica reversibile per la raccolta la distribuzione e lo stoccaggio delle pelli nel processo di rifinizione.
ITVI980166 1998-09-11
PCT/IB1999/001528 WO2000015529A1 (en) 1998-09-11 1999-09-10 Apparatus for collecting, distributing and storing flexible laminar elements, in particular industrial hides

Publications (2)

Publication Number Publication Date
EP1109733A1 EP1109733A1 (de) 2001-06-27
EP1109733B1 true EP1109733B1 (de) 2002-07-24

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Application Number Title Priority Date Filing Date
EP99940420A Expired - Lifetime EP1109733B1 (de) 1998-09-11 1999-09-10 Apparat zum sammeln, verteilen und aufbewahren von flexiblen laminarelementen, insbesondere von industriehäuten

Country Status (6)

Country Link
EP (1) EP1109733B1 (de)
AT (1) ATE221022T1 (de)
AU (1) AU5439799A (de)
DE (1) DE69902281D1 (de)
IT (1) ITVI980166A1 (de)
WO (1) WO2000015529A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109895172A (zh) * 2019-04-01 2019-06-18 杭州翼兔网络科技有限公司 一种皮革自动切割收纳***

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITGE20040034A1 (it) * 2004-05-05 2004-08-05 Schiavi Spa Gruppo di supporto di bobine per macchine accoppiatrici.
ITVE20120022A1 (it) * 2012-07-10 2014-01-11 Ger Elettronica S R L Dispositivo per alimentare pelli, particolarmente pelli bovine, ad una macchina arrotolatrice.
WO2022167835A1 (en) 2021-02-03 2022-08-11 Icol Group Ltd Method and system for preparing flexible materials for processing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1549428A (de) * 1966-10-22 1968-12-13
CH652699A5 (de) * 1981-10-12 1985-11-29 Ferag Ag Einrichtung zum speichern von in einer schuppenformation anfallenden flaechigen erzeugnissen, insbesondere druckprodukten.
BE1003625A4 (nl) * 1989-09-21 1992-05-05 Gaspar A H Byttebier Werkwijze en inrichting voor het verhandelen van vellen.
IT1305902B1 (it) * 1997-03-28 2001-05-21 Gastone Mion Apparato per l'impilamento di prodotti laminari flessibili quali pelliindustriali e consimili

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109895172A (zh) * 2019-04-01 2019-06-18 杭州翼兔网络科技有限公司 一种皮革自动切割收纳***

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Publication number Publication date
ITVI980166A0 (it) 1998-09-11
AU5439799A (en) 2000-04-03
ATE221022T1 (de) 2002-08-15
EP1109733A1 (de) 2001-06-27
ITVI980166A1 (it) 2000-03-11
WO2000015529A1 (en) 2000-03-23
DE69902281D1 (de) 2002-08-29

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