EP2923981B1 - Film storage device for endless films - Google Patents

Film storage device for endless films Download PDF

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Publication number
EP2923981B1
EP2923981B1 EP15153596.0A EP15153596A EP2923981B1 EP 2923981 B1 EP2923981 B1 EP 2923981B1 EP 15153596 A EP15153596 A EP 15153596A EP 2923981 B1 EP2923981 B1 EP 2923981B1
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EP
European Patent Office
Prior art keywords
film
storage device
film storage
upper support
support
Prior art date
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Application number
EP15153596.0A
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German (de)
French (fr)
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EP2923981A1 (en
Inventor
Thomas Eggl
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Krones AG
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Krones AG
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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
    • B65H20/00—Advancing webs
    • B65H20/30—Arrangements for accumulating surplus web
    • B65H20/32—Arrangements for accumulating surplus web by making loops
    • B65H20/34—Arrangements for accumulating surplus web by making loops with rollers
    • 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
    • B65H2301/46—Splicing
    • B65H2301/4601—Splicing special splicing features or applications
    • B65H2301/46014—Splicing special splicing features or applications of webs with labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/60—Coupling, adapter or locking means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/142—Roller pairs arranged on movable frame
    • B65H2404/1422—Roller pairs arranged on movable frame reciprocating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/21—Accumulators
    • B65H2408/217—Accumulators of rollers type, e.g. with at least one fixed and one movable roller
    • B65H2408/2171—Accumulators of rollers type, e.g. with at least one fixed and one movable roller the position of the movable roller(s), i.e. the web loop, being positively actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/15—Height, e.g. of stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/10—Mass, e.g. mass flow rate; Weight; Inertia

Definitions

  • the invention relates to a film storage for continuous films according to the preamble of claim 1, as known from EP 0 989 084 A2 ,
  • the labels are preferably in the form of endless films from a stock holder, such as a film roll, controlled unwound and fed to a film cutter in which individual labels are separated from the continuous film.
  • a stock holder such as a film roll
  • film cutter in which individual labels are separated from the continuous film.
  • film storage Between the stock holder and the film cutter are known to use film storage, as used for example in the DE 3727339A1 and the EP 2284108A2 are described.
  • the endless film is guided back and forth in such film stores along a meandering transport path between an upper and a lower group of deflection rollers, wherein the storage size of the film storage device depends on the distance between the upper and lower deflection rollers.
  • the upper deflection rollers are firmly mounted.
  • the lower pulleys can be mounted on a support, move along a vertical rail or the like. Here, the weight of the lower rollers and their support is carried by the current through the film storage endless film under appropriate tension.
  • Such film stores buffer variations of the transport speed upstream and downstream according to the principle of a dancer by the distance between the upper and the lower group of transport rollers and thus the length of the continuous film running in the film storage dynamically changes.
  • the feed with an input side brake or the like is stopped in continuous conveyance of the endless film, so that the lower pulleys are pulled continuously by the still remaining in the film storage endless film.
  • the roll change is fed faster than conveyed away until the film storage has increased under lowering the lower pulleys back to normal.
  • a film store according to claim 1. Accordingly, this is designed for continuous films, such as film tubes for labeling containers, in particular beverage bottles, with label sleeves.
  • endless film is to be understood here that the film in the sense of a film web or a film tube during production constantly running through the film memory.
  • the film storage device comprises deflection rollers which are fastened to an upper support and to a lower support in such a way that the endless film can be deflected in the storage operation along a meandering transport path extending between the upper and the lower support.
  • the distance between the upper and the lower carrier is variable.
  • the lower bracket includes a weight for adjusting a weight difference between the lower and upper brackets. This allows a defined weight difference between the lower and the upper carrier set.
  • the weight is replaceable.
  • the upper carrier for threading through the endless foil and / or for maintenance measures can be lowered into an ergonomic position. Accordingly, the upper support for the normal memory operation can be arranged in a higher position than is still acceptable with firmly mounted upper straps from an ergonomic point of view.
  • the upper and lower beams are mechanically, pneumatically and / or hydraulically coupled to each other such that lowering of the lower beam causes lifting of the upper beam and vice versa.
  • the lower and the upper carrier can then be lowered and lifted in opposite directions as a function of a weight difference between the two carriers and the counteracting tensile stress in the endless foil. This allows ergonomic operation of the film memory, in particular a change between a position when loading the film storage and a position in the normal storage operation.
  • a mechanical force coupling is conceivable, for example, by connecting the upper and the lower carrier by means of a cable, chain, linkage or the like.
  • a pneumatic and / or hydraulic power coupling is conceivable by means of coupled lifting cylinders, lines, fluids and the like.
  • a particularly advantageous embodiment of the film storage device according to the invention comprises a cable, which is deflected above the upper support and whose one end is connected to the upper support and the other end to the lower support.
  • Such Mechanical coupling is structurally simple and reliable.
  • a deflected cable is to be understood as meaning any combination of tension / suspension cables, chains, belts or the like which, for example, run around at least one roller and / or run in a casing or rail, for example in the sense of a Bowden cable.
  • the lower carrier is heavier than the upper carrier. This allows the principle of a dancer in a one-to-one power coupling between the upper and the lower carrier, so in each case inversely corresponding strokes of the upper and lower carrier.
  • a tensile stress acting on the endless foil during storage operation is adjustable by predetermining a weight difference between the lower and the upper support.
  • the film storage can be adapted to the material properties of the endless film to be stored.
  • the upper carrier and the lower carrier in particular together, can move together in a central position for loading the film storage.
  • This allows a particularly ergonomic assembly, in particular the threading through the endless film.
  • the upper carrier and the lower carrier can be locked in the central position. This facilitates the loading of the film storage with endless film.
  • a particularly favorable embodiment of the film store according to the invention further comprises input-side and output-side deflection rollers which are fastened such that they are located in the central position of the carrier below the deflection rollers of the upper carrier and above the deflection rollers of the lower carrier. This ensures a reliable deflection of the endless film both when threading the endless film as well as in normal storage operation.
  • the film memory according to the invention further comprises a guide means for vertically displacing the lower and the upper carrier.
  • a guide means for vertically displacing the lower and the upper carrier for example, a common guide rail for the lower and the upper carrier may be present. Also conceivable are separate guide rails, as well as guide rods or the like.
  • the deflection rollers of the upper carrier in its lowest position not exceed a height level of 2 m, in particular of 1.5 m. This ensures an ergonomic position of the upper carrier when threading the endless foil for the respective operating personnel.
  • the film storage comprises roller-shaped deflection rollers with a length which is greater than its diameter. This allows reliable operation even in the event that changes the track or lateral position of the endless film on the pulleys during operation of the film storage.
  • the deflection rollers may be cylindrical.
  • the deflection rollers may have a smooth lateral surface.
  • the film storage device comprises a tracking control unit formed downstream, in particular downstream of the output-side deflection roller. This allows an output side correction if the track or lateral position of the endless film on the pulleys during operation of the film storage changes.
  • the film storage device comprises a film drive unit, which is formed downstream, in particular downstream of the output-side deflection roller, for further transporting the endless film.
  • a film drive unit which is formed downstream, in particular downstream of the output-side deflection roller, for further transporting the endless film.
  • a preferred embodiment of the film store 1 comprises an upper carrier 2 with upper deflection rollers 3 and a lower carrier 4 with lower deflection rollers 5.
  • the carriers 2, 4 are each displaceable in the vertical direction along at least one guide device 6 in the vertical direction 6a.
  • the lower support 4 is weighted with a schematically indicated weight 7, such that the lower support 4 is heavier overall than the upper support 2 in total.
  • the upper beam 2 and the lower beam 4 are connected by a cable 8 at the ends 8a, 8b supporting each other.
  • the cable 8 runs over a pulley 9 mounted above the upper support 2.
  • the cable 8 and the pulley 9 could be functionally replaced by chains, belts and matching wheels.
  • a plurality of pulleys 9 and / or Bowden cables or the like could be present for the deflection of the cable 8.
  • mechanical linkage are conceivable in principle, as well as functionally corresponding pneumatic / hydraulic force coupling of the carrier 2, 4.
  • an input-side deflection roller 10 and an output-side deflection roller 11 which are mounted between the upper carrier 2 and the lower carrier 4 such that the upper carrier 2 is always above the input-side and output-side deflection rollers 10 independently of its vertical position 2a. 11 and the lower support 4 regardless of its vertical position 4a always below it. This ensures reliable guidance of an endless film 12, independently of the vertical positions 2a, 4a of the upper carrier 2 and the lower carrier 4. Between the upper and lower deflection rollers 3, 5, the endless film 12 extends along a meandering transport path 12a.
  • the Fig. 1 shows the film storage 1 in a position in which the upper carrier 2 and the lower carrier 4 are moved together to a minimum distance 13.
  • Conceivable would be appropriate sensors for the lower carrier 4, as well as a position limitation by at least one mechanical stop (not shown).
  • the film memory 1 has its smallest memory size. This preferably corresponds to a placement position 15 of the film store 1, in which the deflection rollers 3, 5 of the upper and lower carrier 2, 4 are particularly well accessible to operating personnel.
  • Fig. 2 shows the film memory 1 according to the invention at a maximum distance 16 between the upper carrier 2 and the lower carrier 4 and thus the capacity of the film memory 1.
  • the film memory 1 according to the invention can be any intermediate position between the in the Fig. 1 and 2 occupy positions shown schematically.
  • the guide device 6 is in Fig. 2 omitted for the sake of clarity. Instead, one is in the Fig. 1 for simplicity, not shown transport means 18 schematically indicated, which acts on the endless film 12 frictionally and with variable conveying speed.
  • the transport means 18 can act as a brake by setting the Zujan Industries lower than the discharge speed of the film memory according to the invention 1. With the help of the tension in the endless foil 12 of the upper carrier 2 and the lower carrier 4 are then moved together.
  • the transport means 18 could set the feed rate to a higher value than the discharge speed. In this case, the carriers 2, 4 move apart due to their difference in weight by means of gravity.
  • the carriers 2, 4 can be locked in the central loading position 15 for threading the endless foil 12.
  • a corresponding locking device 19 for example a mechanical clamp or the like.
  • the tension exerted on the endless foil 12 within the foil store 1 can be influenced.
  • the lower support 4 is always heavier than the upper support 2 to ensure the function in the sense of a dancer even with changing vertical position 2a of the upper beam 2 during operation.
  • a suitable tensile stress can be set flexibly as a function of the mechanical load capacity of the endless foil 12.
  • a separate weight 7 is not absolutely necessary if the lower support 4 has a total sufficient for the function of the invention weight.
  • a suitable transport means for the endless film 12 is present on the illustrated film storage 1, for example, for the sake of clarity only in the Fig. 1 schematically indicated output side film drive unit 40 to ensure the further transport of the endless film 12 and to generate a suitable tensile stress at the output of the film memory 1.
  • the film store 1 according to the invention is suitable for any film webs, film tubes or the like, and can also be adapted to different mechanical requirements when storing endless films 12, for example with the aid of the weight 7.
  • the carriers 2, 4 are preferably mounted on a frame 19 of the film memory 1 such that the upper deflection rollers 3 do not exceed a predetermined height level 20 to the surrounding soil, in particular in the placement position 15, for example, a height level 20 of 2 m, in particular of 1.5 m. This improves the ergonomics when threading the film tube 12.
  • the upper guide rollers 3 can be arranged according to the invention in memory operation on a non-operating personnel without ladders or the like height to allow a footprint saving, larger overall height of the film memory 1.
  • the movable upper support 2 allows both an ergonomic operation of the film memory 1 as well as required storage capacities and the respective space adapted designs.
  • the film memory 1 Downstream, in particular downstream of the output-side deflection roller 11, the film memory 1 is preferably associated with a tracking control unit 30 for adjusting and / or correcting the track S or lateral position of the further transported endless film 12, ie transversely to its conveying direction.
  • the film storage 1 Downstream, in particular downstream of the output-side deflection roller 11, the film storage 1 is preferably associated with a film drive unit 40 for further transporting the stored endless film 12.
  • the deflection rollers are preferably cylindrical, in particular cylindrical.
  • the length L of the deflection rollers is then preferably greater than their diameter D.
  • the deflection rollers have a smooth lateral surface M, in contrast to a corrugated or otherwise perforated lateral surface.

Landscapes

  • Advancing Webs (AREA)
  • Replacement Of Web Rolls (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Description

Die Erfindung betrifft einen Folienspeicher für Endlosfolien gemäß Oberbegriff des Anspruchs 1, wie bekannt aus EP 0 989 084 A2 .The invention relates to a film storage for continuous films according to the preamble of claim 1, as known from EP 0 989 084 A2 ,

Bei der Etikettierung von Behältern, beispielsweise Getränkeflaschen, werden die Etiketten vorzugsweise in Form von Endlosfolien von einem Vorratshalter, beispielsweise einer Folienrolle, kontrolliert abgewickelt und einem Folienschneider zugeführt, in dem einzelne Etiketten von der Endlosfolie abgetrennt werden. Zwischen dem Vorratshalter und dem Folienschneider kommen bekanntermaßen Folienspeicher zum Einsatz, wie sie beispielsweise in der DE 3727339A1 und der EP 2284108A2 beschrieben sind. Die Endlosfolie wird in derartigen Folienspeichern entlang einer mäanderförmigen Transportbahn zwischen einer oberen und einer unteren Gruppe von Umlenkrollen hin- und hergeführt, wobei die Speichergröße des Folienspeichers vom Abstand zwischen den oberen und unteren Umlenkrollen abhängt. Bei den bekannten Folienspeichern sind die oberen Umlenkrollen fest montiert. Die unteren Umlenkrollen lassen sich, an einem Träger montiert, entlang einer vertikalen Schiene oder dergleichen verschieben. Hierbei wird das Gewicht der unteren Rollen und ihres Trägers von der durch den Folienspeicher laufenden Endlosfolie unter entsprechender Zugspannung getragen.In the labeling of containers, for example, beverage bottles, the labels are preferably in the form of endless films from a stock holder, such as a film roll, controlled unwound and fed to a film cutter in which individual labels are separated from the continuous film. Between the stock holder and the film cutter are known to use film storage, as used for example in the DE 3727339A1 and the EP 2284108A2 are described. The endless film is guided back and forth in such film stores along a meandering transport path between an upper and a lower group of deflection rollers, wherein the storage size of the film storage device depends on the distance between the upper and lower deflection rollers. In the known film stores the upper deflection rollers are firmly mounted. The lower pulleys can be mounted on a support, move along a vertical rail or the like. Here, the weight of the lower rollers and their support is carried by the current through the film storage endless film under appropriate tension.

Derartige Folienspeicher puffern Variationen der Transportgeschwindigkeit stromaufwärts und stromabwärts nach dem Prinzips eines Tänzers ab, indem sich der Abstand zwischen der oberen und der unteren Gruppe von Transportrollen und damit die Länge der im Folienspeicher laufenden Endlosfolie dynamisch ändert. Beispielsweise wird für einen Rollenwechsel im Vorratshalter die Zuförderung mit einer eingangsseitigen Bremse oder dergleichen bei fortlaufendem Abfördern der Endlosfolie angehalten, so dass die unteren Umlenkrollen von der noch im Folienspeicher verbliebenen Endlosfolie kontinuierlich nach oben gezogen werden. Nach dem Rollenwechsel wird schneller zugefördert als abgefördert, bis sich der Folienspeicher unter Absenken der unteren Umlenkrollen wieder auf ein Normalwert vergrößert hat.Such film stores buffer variations of the transport speed upstream and downstream according to the principle of a dancer by the distance between the upper and the lower group of transport rollers and thus the length of the continuous film running in the film storage dynamically changes. For example, for a roll change in the stock holder, the feed with an input side brake or the like is stopped in continuous conveyance of the endless film, so that the lower pulleys are pulled continuously by the still remaining in the film storage endless film. After the roll change is fed faster than conveyed away until the film storage has increased under lowering the lower pulleys back to normal.

Nachteilig bei derartigen Folienspeichern ist die eingeschränkte Zugänglichkeit der oberen Umlenkrollen für das manuelle Durchfädeln der Endlosfolie durch den Folienspeicher. Im Umkehrschluss ist die Bauhöhe derartiger Folienspeicher aufgrund einer geforderten Zugänglichkeit der oberen Umlenkrollen in unerwünschter Weise eingeschränkt.The disadvantage of such film stores is the limited accessibility of the upper deflection rollers for the manual threading of the endless film through the film storage. Conversely, the height of such film storage is limited due to a required accessibility of the upper pulleys in an undesirable manner.

Es besteht somit Bedarf für in dieser Hinsicht verbesserte Folienspeicher für Endlosfolien.There is thus a need for improved film stores for continuous films in this respect.

Die gestellte Aufgabe wird mit einem Folienspeicher gemäß Anspruch 1 gelöst. Demnach ist dieser für Endlosfolien ausgebildet, wie beispielsweise Folienschläuche zur Etikettierung von Behältern, insbesondere Getränkeflaschen, mit Etikettenhülsen. Unter Endlosfolie ist hierbei zu verstehen, dass die Folie im Sinne einer Folienbahn oder eines Folienschlauchs während des Produktionsbetriebs ständig durch den Folienspeicher läuft. Der Folienspeicher umfasst Umlenkrollen, die an einem oberen Träger und an einem unteren Träger derart befestigt sind, dass sich die Endlosfolie im Speicherbetrieb entlang einer zwischen dem oberen und dem unteren Träger verlaufenden mäanderförmigen Transportbahn umlenken lässt. Zur Größenanpassung des Folienspeichers ist der Abstand zwischen dem oberen und dem unteren Träger veränderbar. Erfindungsgemäß ist nicht nur die vertikale Position des unteren Trägers sondern auch die vertikale Position des oberen Trägers veränderbar. Ferner umfasst der untere Träger ein Gewicht zum Einstellen eines Gewichtsunterschieds zwischen dem unteren und dem oberen Träger. Damit lässt sich ein definierter Gewichtsunterschied zwischen dem unteren und dem oberen Träger einstellen. Vorzugsweise ist das Gewicht austauschbar.The stated object is achieved with a film store according to claim 1. Accordingly, this is designed for continuous films, such as film tubes for labeling containers, in particular beverage bottles, with label sleeves. Under endless film is to be understood here that the film in the sense of a film web or a film tube during production constantly running through the film memory. The film storage device comprises deflection rollers which are fastened to an upper support and to a lower support in such a way that the endless film can be deflected in the storage operation along a meandering transport path extending between the upper and the lower support. For size adjustment of the film memory, the distance between the upper and the lower carrier is variable. According to the invention, not only the vertical position of the lower beam but also the vertical position of the upper beam is changeable. Further, the lower bracket includes a weight for adjusting a weight difference between the lower and upper brackets. This allows a defined weight difference between the lower and the upper carrier set. Preferably, the weight is replaceable.

Damit lässt sich der obere Träger zum Durchfädeln der Endlosfolie und/oder für Instandhaltungsmaßnahmen in eine ergonomisch günstige Position absenken. Entsprechend lässt sich der obere Träger für den normalen Speicherbetrieb in einer höheren Position anordnen, als dies bei fest montierten oberen Trägern aus ergonomischer Sicht noch akzeptabel ist.Thus, the upper carrier for threading through the endless foil and / or for maintenance measures can be lowered into an ergonomic position. Accordingly, the upper support for the normal memory operation can be arranged in a higher position than is still acceptable with firmly mounted upper straps from an ergonomic point of view.

Vorzugsweise sind der obere und der untere Träger mechanisch, pneumatisch und/oder hydraulisch derart miteinander kraftgekoppelt, dass ein Absenken des unteren Trägers ein Anheben des oberen Trägers bewirkt und umgekehrt. Insbesondere lassen sich der untere und der obere Träger dann in Abhängigkeit von einem Gewichtsunterschied zwischen beiden Trägern und der dem entgegen wirkenden Zugspannung in der Endlosfolie gegenläufig absenken und anheben. Dies ermöglicht eine ergonomische Bedienung des Folienspeichers, insbesondere einen Wechsel zwischen einer Position beim Bestücken des Folienspeichers und einer Position im normalen Speicherbetrieb.Preferably, the upper and lower beams are mechanically, pneumatically and / or hydraulically coupled to each other such that lowering of the lower beam causes lifting of the upper beam and vice versa. In particular, the lower and the upper carrier can then be lowered and lifted in opposite directions as a function of a weight difference between the two carriers and the counteracting tensile stress in the endless foil. This allows ergonomic operation of the film memory, in particular a change between a position when loading the film storage and a position in the normal storage operation.

Eine mechanische Kraftkopplung ist beispielsweise durch Verbinden des oberen und des unteren Trägers mittels Seilzug, Kette, Gestänge oder dergleichen denkbar. Eine pneumatische und/oder hydraulische Kraftkopplung ist mittels gekoppelter Hubzylinder, Leitungen, Fluide und dergleichen denkbar.A mechanical force coupling is conceivable, for example, by connecting the upper and the lower carrier by means of a cable, chain, linkage or the like. A pneumatic and / or hydraulic power coupling is conceivable by means of coupled lifting cylinders, lines, fluids and the like.

Eine besonders günstige Ausführungsform des erfindungsgemäßen Folienspeichers umfasst einen oberhalb des oberen Trägers umgelenkten Seilzug, dessen eines Ende mit dem oberen Träger und dessen anderes Ende mit dem unteren Träger tragend verbunden ist. Eine derartige mechanische Ankoppelung ist konstruktiv einfach und zuverlässig. Unter einem umgelenkten Seilzug sind beliebige Kombinationen von Zug-/Tragseilen, Ketten, Riemen oder dergleichen zu verstehen, die beispielsweise um wenigstens eine Rolle geführt und/oder in einer Hülle oder Schiene laufen, beispielsweise im Sinne eines Bowdenzugs.A particularly advantageous embodiment of the film storage device according to the invention comprises a cable, which is deflected above the upper support and whose one end is connected to the upper support and the other end to the lower support. Such Mechanical coupling is structurally simple and reliable. A deflected cable is to be understood as meaning any combination of tension / suspension cables, chains, belts or the like which, for example, run around at least one roller and / or run in a casing or rail, for example in the sense of a Bowden cable.

Vorzugsweise ist der untere Träger schwerer als der obere Träger. Dies ermöglicht das Prinzip eines Tänzers bei einer Eins-zu-Eins-Kraftkopplung zwischen dem oberen und dem unteren Träger, also bei einander invers entsprechenden Hüben des oberen und des unteren Trägers.Preferably, the lower carrier is heavier than the upper carrier. This allows the principle of a dancer in a one-to-one power coupling between the upper and the lower carrier, so in each case inversely corresponding strokes of the upper and lower carrier.

Vorzugsweise ist eine im Speicherbetrieb auf die Endlosfolie wirkende Zugspannung durch Vorgeben eines Gewichtsunterschieds zwischen dem unteren und dem oberen Träger einstellbar. Dadurch lässt sich der Folienspeicher an die Materialeigenschaften der zu speichernden Endlosfolie anpassen.Preferably, a tensile stress acting on the endless foil during storage operation is adjustable by predetermining a weight difference between the lower and the upper support. As a result, the film storage can be adapted to the material properties of the endless film to be stored.

Vorzugsweise lassen sich der obere Träger und der untere Träger, insbesondere gemeinsam, in eine zentrale Stellung zum Bestücken des Folienspeichers zusammenfahren. Dies ermöglicht eine besonders ergonomische Bestückung, insbesondere das Durchfädeln der Endlosfolie.Preferably, the upper carrier and the lower carrier, in particular together, can move together in a central position for loading the film storage. This allows a particularly ergonomic assembly, in particular the threading through the endless film.

Vorzugsweise lassen sich der obere Träger und der untere Träger in der zentralen Stellung arretieren. Dies erleichtert das Bestücken des Folienspeichers mit Endlosfolie.Preferably, the upper carrier and the lower carrier can be locked in the central position. This facilitates the loading of the film storage with endless film.

Eine besonders günstige Ausführungsform des erfindungsgemäßen Folienspeichers umfasst ferner eingangsseitige und ausgangsseitige Umlenkrollen, die derart befestigt sind, dass sie sich in der zentralen Stellung der Träger unterhalb der Umlenkrollen des oberen Trägers und oberhalb der Umlenkrollen des unteren Trägers befinden. Dadurch lässt sich eine zuverlässige Umlenkung der Endlosfolie sowohl beim Durchfädeln der Endlosfolie als auch im normalen Speicherbetrieb sicherstellen.A particularly favorable embodiment of the film store according to the invention further comprises input-side and output-side deflection rollers which are fastened such that they are located in the central position of the carrier below the deflection rollers of the upper carrier and above the deflection rollers of the lower carrier. This ensures a reliable deflection of the endless film both when threading the endless film as well as in normal storage operation.

Vorzugsweise umfasst der erfindungsgemäße Folienspeicher ferner eine Führungseinrichtung zum vertikalen Verschieben des unteren und des oberen Trägers. Beispielsweise kann eine gemeinsame Führungsschiene für den unteren und den oberen Träger vorhanden sein. Ebenso denkbar sind getrennte Führungsschienen, ebenso Führungsstangen oder dergleichen.Preferably, the film memory according to the invention further comprises a guide means for vertically displacing the lower and the upper carrier. For example, a common guide rail for the lower and the upper carrier may be present. Also conceivable are separate guide rails, as well as guide rods or the like.

Vorzugsweise überschreiten die Umlenkrollen des oberen Trägers in seiner untersten Position ein Höhenniveau von 2 m, insbesondere von 1,5 m, nicht. Dies gewährleistet eine ergonomische Position des oberen Trägers beim Durchfädeln der Endlosfolie für das jeweilige Bedienpersonal. Vorzugsweise umfasst der Folienspeicher walzenförmige Umlenkrollen mit einer Länge, die größer ist als ihr Durchmesser. Dies ermöglicht einen zuverlässigen Betrieb auch für den Fall, dass sich die Spur bzw. seitliche Lage der Endlosfolie auf den Umlenkrollen beim Betrieb des Folienspeichers ändert. Alternativ oder ergänzend können die Umlenkrollen zylindrisch sein. Alternativ oder ergänzend können die Umlenkrollen eine glatte Mantelfläche aufweisen.Preferably, the deflection rollers of the upper carrier in its lowest position not exceed a height level of 2 m, in particular of 1.5 m. This ensures an ergonomic position of the upper carrier when threading the endless foil for the respective operating personnel. Preferably, the film storage comprises roller-shaped deflection rollers with a length which is greater than its diameter. This allows reliable operation even in the event that changes the track or lateral position of the endless film on the pulleys during operation of the film storage. Alternatively or additionally, the deflection rollers may be cylindrical. Alternatively or additionally, the deflection rollers may have a smooth lateral surface.

Vorzugsweise umfasst der Folienspeicher eine stromabwärts, insbesondere stromabwärts der ausgangsseitigen Umlenkrolle, ausgebildete Spurregeleinheit. Dies ermöglicht eine ausgangsseitige seitliche Korrektur, falls sich die Spur bzw. seitlichen Lage der Endlosfolie auf den Umlenkrollen beim Betrieb des Folienspeichers ändert.Preferably, the film storage device comprises a tracking control unit formed downstream, in particular downstream of the output-side deflection roller. This allows an output side correction if the track or lateral position of the endless film on the pulleys during operation of the film storage changes.

Vorzugsweise umfasst der Folienspeicher eine stromabwärts, insbesondere stromabwärts der ausgangsseitigen Umlenkrolle, ausgebildete Folienantriebseinheit zum Weitertransportieren der Endlosfolie. Somit lässt sich eine stets ausreichende Zugspannung im Folienspeicher einhalten.Preferably, the film storage device comprises a film drive unit, which is formed downstream, in particular downstream of the output-side deflection roller, for further transporting the endless film. Thus, an always sufficient tension in the film memory can be maintained.

Eine bevorzugte Ausführungsform des erfindungsgemäßen Folienspeichers ist in der Zeichnung dargestellt. Es zeigt:

  • Fig. 1 den Folienspeicher in einer Stellung mit minimaler Speichergröße;
  • Fig. 2 den erfindungsgemäßen Folienspeicher in einer Stellung mit maximaler Speichergröße; und
  • Fig.3 eine schematische Draufsicht auf eine Umlenkrolle mit Endlosfolie.
A preferred embodiment of the film storage device according to the invention is shown in the drawing. It shows:
  • Fig. 1 the film memory in a position with a minimum memory size;
  • Fig. 2 the film store according to the invention in a position with maximum storage size; and
  • Figure 3 a schematic plan view of a pulley with endless foil.

Wie die Fig. 1 und 2 erkennen lassen, umfasst eine bevorzugte Ausführungsform des erfindungsgemäßen Folienspeichers 1 einen oberen Träger 2 mit oberen Umlenkrollen 3 und einen unteren Träger 4 mit unteren Umlenkrollen 5. Die Träger 2, 4 sind jeweils in vertikaler Richtung entlang wenigstens einer Führungseinrichtung 6 in vertikaler Richtung 6a verschiebbar.As the Fig. 1 and 2 1, a preferred embodiment of the film store 1 according to the invention comprises an upper carrier 2 with upper deflection rollers 3 and a lower carrier 4 with lower deflection rollers 5. The carriers 2, 4 are each displaceable in the vertical direction along at least one guide device 6 in the vertical direction 6a.

Der untere Träger 4 ist mit einem schematisch angedeuteten Gewicht 7 beschwert, derart dass der untere Träger 4 insgesamt schwerer ist als der obere Träger 2 insgesamt. Der obere Träger 2 und der untere Träger 4 sind durch einen Seilzug 8 an dessen Enden 8a, 8b tragend miteinander verbunden. Der Seilzug 8 läuft über eine oberhalb des oberen Trägers 2 gelagerte Seilrolle 9. Der Seilzug 8 und die Seilrolle 9 könnten funktionell durch Ketten, Riemen und dazu passende Räder ersetzt werden. Ebenso könnten mehrere Seilrollen 9 und/oder Bowdenzüge oder dergleichen zur Umlenkung des Seilzugs 8 vorhanden sein. Auch mechanische Gestänge sind prinzipiell denkbar, ebenso funktionell entsprechende pneumatische/hydraulische Kraftkopplungen der Träger 2, 4.The lower support 4 is weighted with a schematically indicated weight 7, such that the lower support 4 is heavier overall than the upper support 2 in total. The upper beam 2 and the lower beam 4 are connected by a cable 8 at the ends 8a, 8b supporting each other. The cable 8 runs over a pulley 9 mounted above the upper support 2. The cable 8 and the pulley 9 could be functionally replaced by chains, belts and matching wheels. Likewise, a plurality of pulleys 9 and / or Bowden cables or the like could be present for the deflection of the cable 8. Also, mechanical linkage are conceivable in principle, as well as functionally corresponding pneumatic / hydraulic force coupling of the carrier 2, 4.

Schematisch dargestellt sind ferner eine eingangsseitige Umlenkrolle 10 und eine ausgangsseitige Umlenkrolle 11, die derart zwischen dem oberen Träger 2 und dem unteren Träger 4 gelagert sind, dass sich der obere Träger 2 unabhängig von seiner vertikalen Position 2a stets oberhalb der eingangsseitigen und ausgangsseitigen Umlenkrollen 10, 11 befindet und der untere Träger 4 unabhängig von seiner vertikalen Position 4a stets unterhalb davon. Dies gewährleistet eine zuverlässige Führung einer Endlosfolie 12, unabhängig von den vertikalen Positionen 2a, 4a des oberen Trägers 2 und des unteren Trägers 4. Zwischen den oberen und unteren Umlenkrollen 3, 5 verläuft die Endlosfolie 12 entlang einer mäanderartigen Transportbahn 12a.Also shown schematically are an input-side deflection roller 10 and an output-side deflection roller 11 which are mounted between the upper carrier 2 and the lower carrier 4 such that the upper carrier 2 is always above the input-side and output-side deflection rollers 10 independently of its vertical position 2a. 11 and the lower support 4 regardless of its vertical position 4a always below it. This ensures reliable guidance of an endless film 12, independently of the vertical positions 2a, 4a of the upper carrier 2 and the lower carrier 4. Between the upper and lower deflection rollers 3, 5, the endless film 12 extends along a meandering transport path 12a.

Die Fig. 1 zeigt den Folienspeicher 1 in einer Stellung, bei der der obere Träger 2 und der untere Träger 4 auf einen minimalen Abstand 13 zusammengefahren sind. Beispielsweise überwacht / begrenzt durch wenigstens einen Sensor 14, mit dem sich die vertikale Position 2a des oberen Trägers 2 ermitteln lässt. Denkbar wären selbstverständlich entsprechende Sensoren für den unteren Träger 4, ebenso eine Positionsbegrenzung durch wenigstens einen mechanischen Anschlag (nicht dargestellt).The Fig. 1 shows the film storage 1 in a position in which the upper carrier 2 and the lower carrier 4 are moved together to a minimum distance 13. For example, monitors / limited by at least one sensor 14, with which the vertical position 2a of the upper carrier 2 can be determined. Conceivable, of course, would be appropriate sensors for the lower carrier 4, as well as a position limitation by at least one mechanical stop (not shown).

Bei dem in Fig. 1 dargestellten minimalen Abstand 13 zwischen den Trägern 2, 4 hat der Folienspeicher 1 seine kleinste Speichergröße. Dies entspricht vorzugsweise einer Bestückungsstellung 15 des Folienspeichers 1, in der die Umlenkrollen 3, 5 des oberen und des unteren Trägers 2, 4 für Bedienpersonal besonders gut zugänglich sind.At the in Fig. 1 shown minimum distance 13 between the carriers 2, 4, the film memory 1 has its smallest memory size. This preferably corresponds to a placement position 15 of the film store 1, in which the deflection rollers 3, 5 of the upper and lower carrier 2, 4 are particularly well accessible to operating personnel.

Fig. 2 zeigt den erfindungsgemäßen Folienspeicher 1 bei maximalem Abstand 16 zwischen dem oberen Träger 2 und dem unteren Träger 4 und somit die Kapazität des Folienspeichers 1. Im normalen Speicherbetrieb kann der erfindungsgemäße Folienspeicher 1 jede beliebige Zwischenstellung zwischen den in den Fig. 1 und 2 schematisch dargestellten Stellungen einnehmen. Fig. 2 shows the film memory 1 according to the invention at a maximum distance 16 between the upper carrier 2 and the lower carrier 4 and thus the capacity of the film memory 1. In normal memory operation of the film memory 1 according to the invention can be any intermediate position between the in the Fig. 1 and 2 occupy positions shown schematically.

Die Führungseinrichtung 6 ist in Fig. 2 der besseren Übersichtlichkeit halber weggelassen. Stattdessen ist ein in der Fig. 1 der Einfachheit halber nicht dargestelltes Transportmittel 18 schematisch angedeutet, das reibschlüssig und mit veränderbarer Fördergeschwindigkeit auf die Endlosfolie 12 einwirkt. Beispielsweise kann das Transportmittel 18 als Bremse wirken, indem es die Zufördergeschwindigkeit geringer einstellt als die Abfördergeschwindigkeit aus dem erfindungsgemäßen Folienspeicher 1. Mit Hilfe der Zugspannung in der Endlosfolie 12 werden der obere Träger 2 und der unteren Träger 4 dann zusammen gefahren. Ebenso könnte das Transportmittel 18 die Zufördergeschwindigkeit auf einen höheren Wert einstellen als die Abfördergeschwindigkeit. In diesem Fall bewegen sich die Träger 2, 4 auf Grund ihres Gewichtsunterschieds mit Hilfe der Schwerkraft auseinander.The guide device 6 is in Fig. 2 omitted for the sake of clarity. Instead, one is in the Fig. 1 for simplicity, not shown transport means 18 schematically indicated, which acts on the endless film 12 frictionally and with variable conveying speed. For example, the transport means 18 can act as a brake by setting the Zufördergeschwindigkeit lower than the discharge speed of the film memory according to the invention 1. With the help of the tension in the endless foil 12 of the upper carrier 2 and the lower carrier 4 are then moved together. Likewise, the transport means 18 could set the feed rate to a higher value than the discharge speed. In this case, the carriers 2, 4 move apart due to their difference in weight by means of gravity.

Vorzugsweise lassen sich die Träger 2, 4 in der zentralen Bestückungsstellung 15 zum Einfädeln der Endlosfolie 12 arretieren. Lediglich schematisch angedeutet ist eine entsprechende Arretiervorrichtung 19, beispielsweise eine mechanische Klammer oder dergleichen.Preferably, the carriers 2, 4 can be locked in the central loading position 15 for threading the endless foil 12. Only indicated schematically is a corresponding locking device 19, for example a mechanical clamp or the like.

Mit dem Gewichtsunterschied zwischen dem unteren Träger 4 und dem oberen Träger 2 lässt sich die auf die Endlosfolie 12 ausgeübte Zugspannung innerhalb des Folienspeichers 1 beeinflussen. Im gezeigten Beispiel bei 1:1-Kraftkopplung ist der untere Träger 4 stets schwerer als der oberen Träger 2, um die Funktion im Sinne eines Tänzers auch bei sich verändernder vertikaler Position 2a des oberen Trägers 2 im laufenden Betrieb sicherzustellen.With the difference in weight between the lower carrier 4 and the upper carrier 2, the tension exerted on the endless foil 12 within the foil store 1 can be influenced. In the example shown with a 1: 1 power coupling, the lower support 4 is always heavier than the upper support 2 to ensure the function in the sense of a dancer even with changing vertical position 2a of the upper beam 2 during operation.

Insbesondere mit einem austauschbaren Gewicht 7 lässt sich flexibel eine geeignete Zugspannung in Abhängigkeit von der mechanischen Belastbarkeit der Endlosfolie 12 einstellen. Ein separates Gewicht 7 ist jedoch nicht zwingend notwendig, sofern der untere Träger 4 insgesamt ein für die erfindungsgemäße Funktion ausreichendes Gewicht aufweist.In particular, with a replaceable weight 7, a suitable tensile stress can be set flexibly as a function of the mechanical load capacity of the endless foil 12. However, a separate weight 7 is not absolutely necessary if the lower support 4 has a total sufficient for the function of the invention weight.

Stromabwärts ist am dargestellten Folienspeicher 1 ein geeignetes Transportmittel für die Endlosfolie 12 vorhanden, beispielsweise eine der Übersichtlichkeit halber lediglich in der Fig. 1 schematisch angedeutete ausgangsseitige Folienantriebseinheit 40, um den Weitertransport der Endlosfolie 12 zu gewährleisten und eine geeignete Zugspannung am Ausgang des Folienspeichers 1 zu erzeugen.Downstream, a suitable transport means for the endless film 12 is present on the illustrated film storage 1, for example, for the sake of clarity only in the Fig. 1 schematically indicated output side film drive unit 40 to ensure the further transport of the endless film 12 and to generate a suitable tensile stress at the output of the film memory 1.

Aus dem Stand der Technik hinreichend bekannte Einrichtungen stromaufwärts des Transportmittels 18, wie beispielsweise zum Bereitstellen, Schneiden und Spleißen der Endlosfolie 12 bei einem Vorratsrollenwechsel sind der Einfachheit halber nicht dargestellt.Prior art devices well known in the art upstream of the transport means 18, such as for providing, cutting, and splicing the continuous film 12 in a supply roll change, are not shown for the sake of simplicity.

Generell eignet sich der erfindungsgemäße Folienspeicher 1 für beliebige Folienbahnen, Folienschläuche oder dergleichen und lässt sich beispielsweise mit Hilfe des Gewichts 7 auch an unterschiedliche mechanische Anforderungen beim Speichern von Endlosfolien 12 anpassen.In general, the film store 1 according to the invention is suitable for any film webs, film tubes or the like, and can also be adapted to different mechanical requirements when storing endless films 12, for example with the aid of the weight 7.

Die Träger 2 ,4 sind vorzugsweise an einem Gestell 19 des Folienspeichers 1 derart montiert, dass die oberen Umlenkrollen 3 ein vorgegebenes Höhenniveau 20 zum umgebenden Boden insbesondere in der Bestückungsstellung 15 nicht überschreiten, beispielsweise ein Höhenniveau 20 von 2 m, insbesondere von 1,5 m. Dies verbessert die Ergonomie beim Einfädeln des Folienschlauchs 12. Im Umkehrschluss lassen sich die oberen Umlenkrollen 3 im Speicherbetrieb erfindungsgemäß dann auf einer für Bedienpersonal ohne Leitern oder dergleichen nicht erreichbaren Höhe anordnen, um eine Standfläche sparende, größere Bauhöhe des Folienspeichers 1 zu ermöglichen.The carriers 2, 4 are preferably mounted on a frame 19 of the film memory 1 such that the upper deflection rollers 3 do not exceed a predetermined height level 20 to the surrounding soil, in particular in the placement position 15, for example, a height level 20 of 2 m, in particular of 1.5 m. This improves the ergonomics when threading the film tube 12. Conversely, the upper guide rollers 3 can be arranged according to the invention in memory operation on a non-operating personnel without ladders or the like height to allow a footprint saving, larger overall height of the film memory 1.

Somit ermöglicht insbesondere der bewegliche obere Träger 2 sowohl eine ergonomische Bedienung des Folienspeichers 1 als auch an geforderte Speicherkapazitäten und die jeweiligen Platzverhältnisse angepasste Bauformen.Thus, in particular, the movable upper support 2 allows both an ergonomic operation of the film memory 1 as well as required storage capacities and the respective space adapted designs.

Stromabwärts, insbesondere stromabwärts der ausgangsseitigen Umlenkrolle 11, ist dem Folienspeicher 1 vorzugsweise eine Spurregeleinheit 30 zum Einstellen und/oder Korrigieren der Spur S bzw. seitlichen Lage der weiter transportierten Endlosfolie 12, also quer zur ihrer Förderrichtung, zugeordnet.Downstream, in particular downstream of the output-side deflection roller 11, the film memory 1 is preferably associated with a tracking control unit 30 for adjusting and / or correcting the track S or lateral position of the further transported endless film 12, ie transversely to its conveying direction.

Stromabwärts, insbesondere stromabwärts der ausgangsseitigen Umlenkrolle 11, ist dem Folienspeicher 1 vorzugsweise eine Folienantriebseinheit 40 zum Weitertransportieren der gespeicherten Endlosfolie 12 zugeordnet.Downstream, in particular downstream of the output-side deflection roller 11, the film storage 1 is preferably associated with a film drive unit 40 for further transporting the stored endless film 12.

Wie die Fig. 3 beispielhaft für eine Umlenkrolle 3 erkennen lässt, sind die Umlenkrollen vorzugsweise walzenförmig, insbesondere zylindrisch. Die Länge L der Umlenkrollen ist dann vorzugsweise größer als deren Durchmesser D. Vorzugsweise weisen die Umlenkrollen eine glatte Mantelfläche M auf, im Gegensatz zu einer geriffelten oder anderweitig durchbrochenen Mantelfläche. As the Fig. 3 can be seen exemplarily for a deflection roller 3, the deflection rollers are preferably cylindrical, in particular cylindrical. The length L of the deflection rollers is then preferably greater than their diameter D. Preferably, the deflection rollers have a smooth lateral surface M, in contrast to a corrugated or otherwise perforated lateral surface.

Claims (14)

  1. Film storage device (1) for an endless film (12), comprising deflection rollers (3, 5) which are fastened to an upper support (2) and to a lower support (4) in such a manner that the endless film (12) in the storage mode can be deflected along a meander-like transport path (12a) extending between the upper and the lower support (2, 4), the distance (13, 16) between the upper and the lower support (2, 4) being variable to adapt the size of the film storage device (1), and the vertical positions (2a, 4a) of the upper support (2) and of the lower support (4) being variable, characterized in that a tension acting in the storage mode on the endless film (12) is adjustable by presetting a weight difference between the lower and the upper support (4, 2).
  2. Film storage device according to claim 1, wherein the upper and the lower support (2, 4) are force-coupled with each other mechanically, pneumatically and/or hydraulically in such a manner that a lowering of the lower support (4) causes a lifting of the upper support (2), and vice versa.
  3. Film storage device according to claim 1 or 2, further comprising a cable (8) which is deflected above the upper support (2) and which has one end (8a) supportingly connected to the upper support (2) and another end (8b) supportingly connected to the lower support (4).
  4. Film storage device according to one of the preceding claims, wherein the lower support (4) is heavier than the upper support (2).
  5. Film storage device according to at least one of the preceding claims, wherein the lower support (4) comprises a weight (7) for adjusting a weight difference between the lower and the upper support (4, 2).
  6. Film storage device according to at least one of the preceding claims, wherein the upper support (2) and the lower support (4) can be moved together, particularly jointly, into a central position (15) for fitting the film storage device (1).
  7. Film storage device according to claim 6, wherein the upper support (2) and the lower support (4) can be locked in the central position (15).
  8. Film storage device according to claim 6 or 7, further comprising deflection rollers (11, 12) at the input side and at the output side, which are fastened such that in the central position (15) they are located below the deflection rollers (3) of the upper support (2) and above the deflection rollers (5) of the lower support (4).
  9. Film storage device according to at least one of the preceding claims, further comprising a guide device (6) for vertically shifting the lower and the upper support (2, 4).
  10. Film storage device according to at least one of the preceding claims, wherein the deflection rollers (3) of the upper support (2) in its lowermost position do not exceed a height level (20) of 2 m, particularly of 1.5 m.
  11. Film storage device according to at least one of the preceding claims, further comprising a frictionally conveying/decelerating transport means (18) for the endless film (12) for variably adjusting the feed rate thereof into the film storage device (1).
  12. Film storage device according to at least one of the preceding claims, wherein the deflection rollers (3, 5) are cylindrical and have a length (L) greater than their diameter (D).
  13. Film storage device according to at least one of the preceding claims, further comprising a downstream track control unit (30) for the endless film (12).
  14. Film storage device according to at least one of the preceding claims, further comprising a downstream film drive unit (40) for the further transportation of the endless film (12).
EP15153596.0A 2014-03-12 2015-02-03 Film storage device for endless films Active EP2923981B1 (en)

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DE202014101105.6U DE202014101105U1 (en) 2014-03-12 2014-03-12 Film storage for continuous films

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CN104909219B (en) 2018-04-24
CN104909219A (en) 2015-09-16
EP2923981A1 (en) 2015-09-30
DE202014101105U1 (en) 2015-06-17
CN204778052U (en) 2015-11-18

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