EP0771624A2 - Cutting device for webs of flat material - Google Patents

Cutting device for webs of flat material Download PDF

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Publication number
EP0771624A2
EP0771624A2 EP96117476A EP96117476A EP0771624A2 EP 0771624 A2 EP0771624 A2 EP 0771624A2 EP 96117476 A EP96117476 A EP 96117476A EP 96117476 A EP96117476 A EP 96117476A EP 0771624 A2 EP0771624 A2 EP 0771624A2
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EP
European Patent Office
Prior art keywords
cutting device
damping
cutting
flat material
damping plate
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
EP96117476A
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German (de)
French (fr)
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EP0771624B1 (en
EP0771624A3 (en
Inventor
Jürgen Ott
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.)
Meto International GmbH
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Esselte Meto International GmbH
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Filing date
Publication date
Priority claimed from DE1995141104 external-priority patent/DE19541104C1/en
Application filed by Esselte Meto International GmbH filed Critical Esselte Meto International GmbH
Publication of EP0771624A2 publication Critical patent/EP0771624A2/en
Publication of EP0771624A3 publication Critical patent/EP0771624A3/en
Application granted granted Critical
Publication of EP0771624B1 publication Critical patent/EP0771624B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006Article or web delivery apparatus incorporating cutting or line-perforating devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/38Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member
    • B26D1/385Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08Means for treating work or cutting member to facilitate cutting

Definitions

  • the invention relates to a cutting device for a conveyed flat material web, in particular for producing labels, the cutting device having an input section, a cutting section, an output section, and a damping device assigned to the input section and facing the flat material web.
  • DE-OS 2 364 035 discloses a generic device for severing web-like material, in particular paper webs for the production of cards. Before the material web reaches a cutting device with which it is cut into individual sections, it is passed between a brake roller and an angled plate or a trough in order to relieve the web of part of the tension which is created by an upstream transport device and so that Prevent the formation of burrs or other deformations on perforation holes of the material web that interact with the transport device.
  • a cutting mechanism is used to cut off sections of a web of a recording medium, which then serve, for example, as tags.
  • the cutting mechanism cuts the longitudinally moving web transversely and has interacting ones Cutting knife.
  • the cutting mechanism is arranged within a housing with an input section in the form of an opening for inserting the web. The separated sections of the web are then fed to a stacking device arranged within the housing.
  • Such cutting devices are arranged downstream of a printing unit, for example as a so-called label cutter, in which the continuously conveyed flat material web is printed in sections.
  • a printing unit for example as a so-called label cutter, in which the continuously conveyed flat material web is printed in sections.
  • successive printed sections of the flat material web are cut off essentially transversely to the web direction.
  • the separating cut running transversely to the transport direction is usually carried out by a rotating knife roller, the axis of rotation of which runs perpendicular to the transport direction and parallel to the plane of the web.
  • At least one knife bar provided on the circumference of the cutting roller preferably runs slightly spiral, so that a cut running from one side of the web to the other side is produced when the cutting device is in operation.
  • the cutting speed is very high compared to the transport speed of the flat material web
  • the cut running perpendicular to the transport direction disrupts or blocks the web transport process. It was found that shock waves propagating against the direction of transport are formed in the flat material web. In addition, twists occur in the plane of the flat material web around the current position of the intersection running transverse to the web.
  • twists therefore result in the fact that - when considering a cutting process - in the area behind the intersection of the knife bar, ie where it has already been separated, that which is subsequently conveyed No resistance is opposed to the path, but a maximum resistance is opposed at the current position of the intersection of the path being fed. At the section that has not yet been separated in the cutting direction before the current position of the intersection, the path conveyed is opposed to a resistance which is of the order of magnitude between the resistance values for the two sections described above.
  • shock waves propagate against the transport direction of the flat material web and can cause the print head of an upstream printing unit to lift off, which leads to poor print quality. With bar code printers, this can make the printed bar code illegible.
  • the brake roller from DE-OS 2 364 035 is relatively complex and expensive and lies only on its surface line on the flat material web, so that no flat contact and no sufficient damping of the shock waves can occur.
  • the present invention is therefore based on the object of developing a cutting device of the generic type in such a way that the unwanted shock waves resulting from the cutting process are absorbed and damped in such a way that they can only have a significantly reduced adverse influence on a device connected upstream of the input cutout.
  • a cutting device of the type mentioned which is characterized in that the damping device for receiving and damping as a result of Cutting process occurring shock waves in the flat material web is formed by a damping plate or a damping plate.
  • the occurrence of shock waves per se is not prevented, but rather their disruptive propagation against the direction of transport.
  • the damping device is formed by a damping plate or a damping plate, which faces the flat material web.
  • the damping plate or sheet could in itself rest on the flat material web and thus prevent the shock waves from spreading.
  • the damping device in particular the plate or sheet, is prestressed in the direction of the flat material web and the prestressing force of the damping device is adjustable. The latter can be done, for example, by different positioning or stopping points of a leg of a spring, in particular a spiral spring.
  • the damping device is designed and arranged such that it also serves as a guide for the flat material web.
  • the already mentioned curved design of the damping plate or plate has proven to be advantageous.
  • the input section of the cutting device preferably has an insertion slot which tapers in the transport direction and is delimited at least on one side by the damping plate or the sheet metal. This insertion slot is delimited on the side opposite the damping plate or sheet by a guide surface, which in particular is also curved in an arc. The two curvatures are advantageously in the same direction.
  • the damping device can advantageously be designed such that the damping plate or plate rests on the guide surface.
  • the plate or sheet can rest on the guide surface with a surface or edge running transversely to the transport direction.
  • an embodiment is preferred in which the damping plate or plate rests on the guide surface via lateral spacers, so that even a very thin web, such as thermal printing paper with a thickness of approximately 0.18 mm, can be easily inserted into the input section of the Cutting device can be introduced.
  • the clear cross-section of the insertion slot preferably has a smallest extension transversely to the plane of the web, which is slightly larger than the thickness of the web. Even minor shock wave amplitudes are then effectively damped.
  • the damping plate or sheet has a smallest distance from the guide surface of 0.35 to 2 mm, preferably 0.5 to 1 mm.
  • the figures show a cutting device according to a preferred embodiment of the invention.
  • the cutting device comprises a housing 2, on which a cutting unit 6, which can be covered with a pivotable housing cover 4, is placed.
  • the electronics and the drive for the cutting unit 6 are accommodated in the housing 2.
  • the cutting device is arranged with its housing 2 via a fastening device 8 on a printer unit 10 which is only partially shown.
  • the cutting device comprises an input section 12 for a flat material web to be separated into successive sections, a cutting section 14 and an output section 16 for sections of the web cut transversely to the transport direction.
  • the cutting unit 6 comprises a cutting roller 18 which can be rotated transversely to the transport direction of the flat material web to be cut and also carries knife bars 20 which run transversely to the transport direction.
  • the cutting roller 18 is driven in a solenoid-controlled manner during the cutting process, so that the knife bars rotate past a stationary, prestressed cutting bar 22 which serves as a counter bearing for the knife bars 20. Since the knife strips 20, as can be seen from FIG. 1, run slightly spiral, the point of intersection, ie the point of contact between the knife strip 20 and the cutting bar 22, moves transversely to the transport direction from one longitudinal edge of the flat material web to the other.
  • the damping device 24 comprises a curved damping plate 26, which is assigned to a guide surface 28 of the input section 12.
  • the damping plate 26 and the guide surface 28 delimit an insertion slot 30 tapering in the transport direction for the flat material web to be cut into sections.
  • the damping plate 26 is articulated on the fastening device 8 so as to be pivotable about an axis 31 running transversely to the transport direction and is prestressed in the direction of the guide surface 28 by a spiral spring 32.
  • Various holding points 34 are provided for the leg 36 of the spiral spring 32 facing away from the damping plate 26, by means of which the pretensioning force of the damping device 24 can be adjusted.
  • the damping plate 26 is supported against the guide surface 28, the guide plate 26 not resting on the guide surface 28 with an edge running transversely to the transport direction, but rather touching the guide surface 28 via lateral spacers 38, so that there is a slot-shaped spacing, by which also thin guideways, such as thermal printing paper with a thickness of about 0.18 mm can be introduced in the direction of the cutting unit 6.
  • shock waves now occur during operation of the cutting device these lead to the deflection of the resiliently prestressed damping plate 26, so that as much energy is removed from the shock waves by a suitable choice of the prestress that they cannot have a disruptive effect in the area of the print head of the printing unit 10.
  • the fastening device 8 comprises a holding section, designated overall by reference numeral 40, which has on its side facing away from the housing 2 an anchor plate 42 which can be inserted into a complementarily designed receptacle 44 of the printing unit 10.
  • the anchor plate 42 comprises two threaded bolts 46 which pass through an opening 48 of the holding section 40 in the direction of the housing 2 and are screwed to a nut 50 at their free end. By tightening the nut 50, the holding section 40 can be fixed in place on the printing unit 10; only then is the housing 2 assembled with the cutting unit 6.
  • the holding section 40 furthermore has two parallel bolts 52 which project in the direction of the housing 2 and which are fastened to the holding section 40 via threaded bores 54 and screws 56 on the end face.
  • the bolts 52 hold and guide the housing 2.
  • through openings 60 are provided in the housing 2, through which the bolts 52 extend when the housing 2 is pushed onto them.
  • the free ends 62 of the bolts 52 which pass through the housing are connected to a plate-shaped reference element 68 via threaded bores 64 and screws 66 on the end face.
  • the housing 2 is displaceably mounted on the bolt 52, with on the one hand the reference element 68 and on the other hand a sleeve 72 forming an axial stop 70, which is pushed onto a bolt 52 and between the housing 2 and the holding section 40 is arranged to form a boundary.
  • an adjusting screw 74 is provided, which extends from the outside through a non-threaded through opening 76 in the reference element 68 and is screwed into an externally threaded section 78 within the housing 2.
  • the set screw 74 is rotatable with respect to the unthreaded through opening 76 in the reference element 68, and it is coupled in the axial direction to the reference element by means of an annular disk and a toothed spring washer such that when the set screw 74 is screwed in or unscrewed into or out of the threaded section 78, the housing 2 is moved in the direction of the reference element 68 or away from it in the direction of the stop 70 of the sleeve 72. In this way, a fine adjustment of the distance of the cutting section 14 from the print head of the printing unit 10 can be achieved.
  • the housing 2 is guided essentially free of play on the bolt 52 and can be adjusted by the adjusting device 80 formed by reference element 68, adjusting screw 74 and internal thread section 78.

Abstract

The cutting device has an input section (12), a cutting section (14) and a delivery section (16). The input section has a damping device (24) for damping the shock waves in the material web resulting from the cutting operation. The damping device is provided by a curved damping plate or damping sheet (26) which can pivot in response to the shock waves, for absorbing the shock wave energy.

Description

Die Erfindung betrifft eine Schneideinrichtung für eine geförderte Flachmaterialbahn, insbesondere zur Herstellung von Etiketten, wobei die Schneideinrichtung einen Eingabeabschnitt, einen Schneidabschnitt, einen Ausgabeabschnitt, sowie eine dem Eingabeabschnitt zugeordnete, der Flachmaterialbahn zugewandte Dämpfungsvorrichtung aufweist.The invention relates to a cutting device for a conveyed flat material web, in particular for producing labels, the cutting device having an input section, a cutting section, an output section, and a damping device assigned to the input section and facing the flat material web.

Die DE-OS 2 364 035 offenbart eine gattungsgemäße Vorrichtung zum Durchtrennen bahnförmigen Materials, insbesondere von Papierbahnen zur Herstellung von Karten. Bevor die Materialbahn eine Schneideinrichtung erreicht, mit der sie in einzelne Abschnitte geschnitten wird, wird sie zwischen einer Bremswalze und einer gewinkelten Platte oder einem Trog hindurchgeführt, um die Bahn von einem Teil der Spannung zu entlasten, die durch eine vorgeschaltete Transporteinrichtung entsteht und so das Entstehen von Graten oder anderer Verformungen an mit der Transporteinrichtung interagierenden Perforationslöchern der Materialbahn zu verhindern.DE-OS 2 364 035 discloses a generic device for severing web-like material, in particular paper webs for the production of cards. Before the material web reaches a cutting device with which it is cut into individual sections, it is passed between a brake roller and an angled plate or a trough in order to relieve the web of part of the tension which is created by an upstream transport device and so that Prevent the formation of burrs or other deformations on perforation holes of the material web that interact with the transport device.

Eine andere Schneideinrichtung ist aus der GB 2 169 237 A und der DE 36 42 562 A bekannt geworden. Ein Schneidemechanismus dient zum Abtrennen von Abschnitten einer Bahn eines Aufzeichnungsträgers, die dann beispielsweise als Anhängeetiketten dienen. Der Schneidemechanismus schneidet die sich longitudinal bewegende Bahn transversal und hat zusammenwirkende Schneidemesser. Der Schneidemechanismus ist innerhalb eines Gehäuses mit einem Eingabeabschnitt in Form einer Öffnung zum Einführen der Bahn angeordnet. Die abgetrennten Abschnitte der Bahn werden dann einer innerhalb des Gehäuses angeordneten Stapelvorrichtung zugeführt.Another cutting device is known from GB 2 169 237 A and DE 36 42 562 A. A cutting mechanism is used to cut off sections of a web of a recording medium, which then serve, for example, as tags. The cutting mechanism cuts the longitudinally moving web transversely and has interacting ones Cutting knife. The cutting mechanism is arranged within a housing with an input section in the form of an opening for inserting the web. The separated sections of the web are then fed to a stacking device arranged within the housing.

Derartige Schneideinrichtungen werden bspw. als sog. Etikettencutter einer Druckeinheit nachgeordnet, in der die kontinuierlich geförderte Flachmaterialbahn abschnittsweise bedruckt wird. In der Schneideinrichtung werden aufeinanderfolgende bedruckte Abschnitte der Flachmaterialbahn im wesentlichen quer zur Bahnrichtung abgetrennt.Such cutting devices are arranged downstream of a printing unit, for example as a so-called label cutter, in which the continuously conveyed flat material web is printed in sections. In the cutting device, successive printed sections of the flat material web are cut off essentially transversely to the web direction.

Der quer zur Transportrichtung verlaufende Trennschnitt wird üblicherweise von einer rotierenden Messerwalze ausgeführt, deren Rotationsachse senkrecht zur Transportrichtung und parallel zur Bahnebene verläuft. Wenigstens eine am Umfang der Schneidwalze vorgesehene Messerleiste verläuft vorzugsweise geringfügig spiralförmig, so daß beim Betrieb der Schneideinrichtung ein von einer Seite der Bahn zur anderen Seite verlaufender Schnitt erzeugt wird. Obschon die Schnittgeschwindigkeit gegenüber der Transportgeschwindigkeit der Flachmaterialbahn sehr hoch ist, stört bzw. blockiert der senkrecht zur Transportrichtung verlaufende Schnitt den Transportvorgang der Bahn. Es wurde festgestellt, daß hierbei entgegen der Transportrichtung sich ausbreitende Stoßwellen in der Flachmaterialbahn gebildet werden. Außerdem treten Verwindungen in der Ebene der Flachmaterialbahn um die momentane Lage des quer zur Bahn verlaufenden Schnittpunkts auf. Diese Verwindungen resultieren daher, daß - bei Betrachtung eines Schneidvorgangs - im Bereich hinter dem Schnittpunkt der Messerleiste, wo also bereits getrennt wurde, der nachgeförderten Bahn keinerlei Widerstand entgegengesetzt wird, daß aber an der momentanen Position des Schnittpunkts der nachgeförderten Bahn ein maximaler Widerstand entgegengesetzt wird. An dem in Schneidrichtung noch nicht abgetrennten Abschnitt vor der momentanen Position des Schnittpunkts wird der nachgeförderten Bahn ein Widerstand entgegengesetzt, der größenordnungsmäßig zwischen den Widerstandswerten bei den beiden vorstehend geschilderten Abschnitten liegt.The separating cut running transversely to the transport direction is usually carried out by a rotating knife roller, the axis of rotation of which runs perpendicular to the transport direction and parallel to the plane of the web. At least one knife bar provided on the circumference of the cutting roller preferably runs slightly spiral, so that a cut running from one side of the web to the other side is produced when the cutting device is in operation. Although the cutting speed is very high compared to the transport speed of the flat material web, the cut running perpendicular to the transport direction disrupts or blocks the web transport process. It was found that shock waves propagating against the direction of transport are formed in the flat material web. In addition, twists occur in the plane of the flat material web around the current position of the intersection running transverse to the web. These twists therefore result in the fact that - when considering a cutting process - in the area behind the intersection of the knife bar, ie where it has already been separated, that which is subsequently conveyed No resistance is opposed to the path, but a maximum resistance is opposed at the current position of the intersection of the path being fed. At the section that has not yet been separated in the cutting direction before the current position of the intersection, the path conveyed is opposed to a resistance which is of the order of magnitude between the resistance values for the two sections described above.

Die insgesamt als Stoßwellen bezeichneten Störungen pflanzen sich entgegen der Transportrichtung der Flachmaterialbahn fort und können ein Abheben des Druckkopfes einer vorgeordneten Druckeinheit bewirken, was zu einer schlechten Druckqualität führt. Bei Bar-Code-Druckern kann dies dazu führen, daß der gedruckte Bar-Code nicht mehr lesbar ist.The disturbances referred to as shock waves propagate against the transport direction of the flat material web and can cause the print head of an upstream printing unit to lift off, which leads to poor print quality. With bar code printers, this can make the printed bar code illegible.

Die Bremswalze aus der DE-OS 2 364 035 ist relativ aufwendig und teuer und liegt nur auf ihrer Mantellinie auf der Flachmaterialbahn an, so daß kein flächiger Kontakt und keine hinreichende Dämpfung der Stoßwellen zustande kommen kann.The brake roller from DE-OS 2 364 035 is relatively complex and expensive and lies only on its surface line on the flat material web, so that no flat contact and no sufficient damping of the shock waves can occur.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Schneideinrichtung gattungsgemäßer Art dahingehend weiterzubilden, daß die durch den Schneidevorgang entstehenden, unerwünschten Stoßwellen derart aufgenommen und gedämpft werden, daß sie nur noch einen wesentlich reduzierten nachteiligen Einfluß auf eine dem Eingabeausschnitt vorgeschaltetes Gerät haben können.The present invention is therefore based on the object of developing a cutting device of the generic type in such a way that the unwanted shock waves resulting from the cutting process are absorbed and damped in such a way that they can only have a significantly reduced adverse influence on a device connected upstream of the input cutout.

Diese Aufgabe wird durch eine Schneideinrichtung der eingangs genannten Art gelöst, die dadurch gekennzeichnet ist, daß die Dämpfungsvorrichtung zur Aufnahme und Dämpfung infolge des Schneidvorgangs auftretender Stoßwellen bei der Flachmaterialbahn von einer Dämpfungsplatte oder einem Dämpfungsblech gebildet ist.This object is achieved by a cutting device of the type mentioned, which is characterized in that the damping device for receiving and damping as a result of Cutting process occurring shock waves in the flat material web is formed by a damping plate or a damping plate.

Bei der erfindungsgemäßen Schneideinrichtung wird also nicht das Auftreten von Stoßwellen an sich verhindert, sondern ihre störende Ausbreitung entgegen der Transportrichtung. Durch Dämpfen der Stoßwellen wird deren Energie aufgenommen, so daß sie je nach Stärke der Dämpfung in einem bestimmten Abstand von der Schneideinrichtung, etwa im Bereich des Druckkopfs einer Druckeinheit, nicht mehr festgestellt werden können oder sich zumindest nicht mehr störend auswirken. Die Dämpfungsvorrichtung wird von einer Dämpfungsplatte oder einem Dämpfungsblech gebildet, welche bzw. welches der Flachmaterialbahn zugewandt ist. Beim Auftreten von Stoßwellen ist dann ein flächenhafter Kontakt zwischen der Dämpfungsplatte oder dem - blech und der Bahn gegeben, wodurch die Energie der Stoßwellen effizient aufgenommen werden kann.In the cutting device according to the invention, the occurrence of shock waves per se is not prevented, but rather their disruptive propagation against the direction of transport. By damping the shock waves, their energy is absorbed so that, depending on the strength of the damping at a certain distance from the cutting device, for example in the area of the print head of a printing unit, they can no longer be determined or at least no longer have a disruptive effect. The damping device is formed by a damping plate or a damping plate, which faces the flat material web. When shock waves occur, there is extensive contact between the damping plate or sheet and the web, as a result of which the energy of the shock waves can be absorbed efficiently.

Es hat sich dabei als vorteilhaft erwiesen, wenn die Dämpfungsplatte oder das -blech gebogen ausgebildet ist.It has proven to be advantageous if the damping plate or the -plate is curved.

Die Dämpfungsplatte oder das -blech könnte an sich auf der Flachmaterialbahn aufliegen und so eine Ausbreitung der Stoßwellen verhindern. Demgegenüber wird vorgeschlagen, die Dämpfungsplatte oder das -blech schwenkbar anzuordnen, so daß es von bei der Flachmaterialbahn auftretenden Stoßwellen auslenkbar ist. Dabei erweist es sich als vorteilhaft, wenn die Dämpfungsvorrichtung, insbesondere die Platte oder das Blech in Richtung auf die Flachmaterialbahn vorgespannt ist und die Vorspannkraft der Dämpfungsvorrichtung einstellbar ist. Letzteres kann bspw. durch verschiedene Positionierungen oder Haltepunkte eines Schenkels einer Feder, insbesondere einer Spiralfeder, erreicht werden.The damping plate or sheet could in itself rest on the flat material web and thus prevent the shock waves from spreading. In contrast, it is proposed to arrange the damping plate or the plate so that it can be deflected by shock waves occurring in the flat material web. It proves to be advantageous if the damping device, in particular the plate or sheet, is prestressed in the direction of the flat material web and the prestressing force of the damping device is adjustable. The latter can be done, for example, by different positioning or stopping points of a leg of a spring, in particular a spiral spring.

Bei einer bevorzugten Ausführungsform der Erfindung ist die Dämpfungsvorrichtung so ausgebildet und angeordnet, daß sie zugleich als Leitmittel für die Flachmaterialbahn dient. Hierfür erweist sich die bereits erwähnte gebogene Ausführung der Dämpfungsplatte oder des -blechs als vorteilhaft. Vorzugsweise weist der Eingabeabschnitt der Schneideinrichtung einen in Transportrichtung sich verjüngenden Einführschlitz auf, der zumindest auf einer Seite von der Dämpfungsplatte oder dem -blech begrenzt ist. Dieser Einführschlitz ist auf der der Dämpfungsplatte oder dem -blech gegenüberliegenden Seite von einer Führungsfläche begrenzt, die insbesondere ebenfalls bogenförmig gekrümmt ist. Vorteilhaft sind die beiden Krümmungen gleichsinnig.In a preferred embodiment of the invention, the damping device is designed and arranged such that it also serves as a guide for the flat material web. For this purpose, the already mentioned curved design of the damping plate or plate has proven to be advantageous. The input section of the cutting device preferably has an insertion slot which tapers in the transport direction and is delimited at least on one side by the damping plate or the sheet metal. This insertion slot is delimited on the side opposite the damping plate or sheet by a guide surface, which in particular is also curved in an arc. The two curvatures are advantageously in the same direction.

Die Dämpfungsvorrichtung kann vorteilhafterweise so ausgebildet sein, daß die Dämpfungsplatte oder das -blech auf der Führungsfläche aufliegt. Die Platte oder das Blech kann dabei mit einer quer zur Transportrichtung verlaufenden Fläche oder Kante auf der Führungsfläche aufliegen. Demgegenüber wird jedoch eine Ausführung bevorzugt, bei der die Dämpfungsplatte oder das -blech über seitliche Abstandshalter auf der Führungsfläche aufliegt, so daß auch eine sehr dünne Bahn, etwa ein Thermodruckpapier mit einer Dicke von ca. 0,18 mm, problemlos in den Eingabeabschnitt der Schneideinrichtung eingeführt werden kann. Der lichte Querschnitt des Einführschlitzes weist dabei vorzugsweise eine geringste Erstreckung quer zur Bahnebene auf, die geringfügig größer ist als die Dicke der Bahn. Schon geringfügige Stoßwellenamplituden werden dann effektiv gedämpft. Vorteilhafterweise weist die Dämpfungsplatte oder das -blech einen kleinsten Abstand von der Führungsfläche von 0,35 bis 2 mm, vorzugsweise von 0,5 bis 1 mm auf.The damping device can advantageously be designed such that the damping plate or plate rests on the guide surface. The plate or sheet can rest on the guide surface with a surface or edge running transversely to the transport direction. In contrast, however, an embodiment is preferred in which the damping plate or plate rests on the guide surface via lateral spacers, so that even a very thin web, such as thermal printing paper with a thickness of approximately 0.18 mm, can be easily inserted into the input section of the Cutting device can be introduced. The clear cross-section of the insertion slot preferably has a smallest extension transversely to the plane of the web, which is slightly larger than the thickness of the web. Even minor shock wave amplitudes are then effectively damped. Advantageously, the damping plate or sheet has a smallest distance from the guide surface of 0.35 to 2 mm, preferably 0.5 to 1 mm.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den beigefügten Schutzansprüchen und der zeichnerischen Darstellung sowie der nachfolgenden Beschreibung einer vorteilhaften Ausführungsform der erfindungsgemäßen Schneideinrichtung. In der Zeichnung zeigt:

Figur 1
eine teilweise geschnittene Seitenansicht einer erfindungsgemäßen Schneideinrichtung; und
Figur 2
eine teilweise geschnittene Draufsicht auf die Schneideinrichtung nach Figur 1.
Further features, details and advantages of the invention result from the appended protection claims and the graphic representation as well as the following description of an advantageous embodiment of the cutting device according to the invention. The drawing shows:
Figure 1
a partially sectioned side view of a cutting device according to the invention; and
Figure 2
2 shows a partially sectioned top view of the cutting device according to FIG. 1.

Die Figuren zeigen eine Schneideinrichtung gemäß einer bevorzugten Ausführungsform der Erfindung. Die Schneideinrichtung umfaßt ein Gehäuse 2, auf dem eine mit einem schwenkbaren Gehäusedeckel 4 abdeckbare Schneideinheit 6 aufgesetzt ist. Im Gehäuse 2 ist die Elektronik und der Antrieb für die Schneideinheit 6 untergebracht. Die Schneideinrichtung ist mit ihrem Gehäuse 2 über eine Befestigungsvorrichtung 8 an einer nur teilweise dargestellten Druckereinheit 10 angeordnet.The figures show a cutting device according to a preferred embodiment of the invention. The cutting device comprises a housing 2, on which a cutting unit 6, which can be covered with a pivotable housing cover 4, is placed. The electronics and the drive for the cutting unit 6 are accommodated in the housing 2. The cutting device is arranged with its housing 2 via a fastening device 8 on a printer unit 10 which is only partially shown.

Die Schneideinrichtung umfaßt einen Eingabeabschnitt 12 für eine in aufeinanderfolgende Abschnitte zu trennende Flachmaterialbahn, einen Schneidabschnitt 14 und einen Ausgabeabschnitt 16 für quer zur Transportrichtung abgetrennte Abschnitte der Bahn. Die Schneideinheit 6 umfaßt eine Schneidwalze 18, die quer zur Transportrichtung der zu schneidenden Flachmaterialbahn umdrehbar ist und ebenfalls quer zur Transportrichtung verlaufende Messerleisten 20 trägt. Die Schneidwalze 18 wird beim Schneidvorgang solenoidgesteuert angetrieben, so daß sich die Messerleisten an einem ortsfesten vorgespannten Schneidbalken 22 vorbeidrehen, der als Gegenlager für die Messerleisten 20 dient. Da die Messerleisten 20, wie dies aus der Figur 1 ersichtlich ist, geringfügig spiralförmig verlaufen, wandert der Schnittpunkt, d.h. der Berührungspunkt von Messerleiste 20 und Schneidbalken 22, quer zur Transportrichtung von einer Längskante der Flachmaterialbahn zur anderen.The cutting device comprises an input section 12 for a flat material web to be separated into successive sections, a cutting section 14 and an output section 16 for sections of the web cut transversely to the transport direction. The cutting unit 6 comprises a cutting roller 18 which can be rotated transversely to the transport direction of the flat material web to be cut and also carries knife bars 20 which run transversely to the transport direction. The cutting roller 18 is driven in a solenoid-controlled manner during the cutting process, so that the knife bars rotate past a stationary, prestressed cutting bar 22 which serves as a counter bearing for the knife bars 20. Since the knife strips 20, as can be seen from FIG. 1, run slightly spiral, the point of intersection, ie the point of contact between the knife strip 20 and the cutting bar 22, moves transversely to the transport direction from one longitudinal edge of the flat material web to the other.

Beim Ausführen eines Schneidvorgangs entstehen Stoßwellen, die sich entgegen der Transportrichtung in Richtung auf den nicht dargestellten Druckkopf der Druckeinheit 10 fortpflanzen und zu Störungen führen. Um diesen Stoßwellen zu begegnen, ist eine insgesamt mit dem Bezugszeichen 24 dargestellte Dämpfungsvorrichtung vorgesehen. Die Dämpfungsvorrichtung 24 umfaßt ein gebogenes Dämpfungsblech 26, welches einer Führungsfläche 28 des Eingabeabschnitts 12 zugeordnet ist. Das Dämpfungsblech 26 und die Führungfläche 28 begrenzen einen in Transportrichtung sich verjüngenden Einführschlitz 30 für die in Abschnitte zu schneidende Flachmaterialbahn. Das Dämpfungsblech 26 ist um eine quer zur Transportrichtung verlaufende Achse 31 schwenkbar an der Befestigungsvorrichtung 8 angelenkt und durch eine Spiralfeder 32 in Richtung auf die Führungsfläche 28 vorgespannt. Es sind verschiedene Haltepunkte 34 für den von dem Dämpfungsblech 26 abgewandten Schenkel 36 der Spiralfeder 32 vorgesehen, mittels derer die Vorspannkraft der Dämpfungsvorrichtung 24 eingestellt werden kann. Das Dämpfungsblech 26 stützt sich gegen die Führungsfläche 28 ab, wobei das Führungsblech 26 nicht mit einem quer zur Transportrichtung verlaufenden Rand auf der Führungsfläche 28 aufliegt, sondern über seitliche Abstandshalter 38 die Führungsfläche 28 berührt, so daß eine schlitzförmige Beabstandung gegeben ist, durch welche auch dünne Führungsbahnen, etwa Thermodruckpapier mit einer Dicke von ca. 0,18 mm in Richtung auf die Schneideinheit 6 eingeführt werden können.When a cutting process is carried out, shock waves occur which propagate against the transport direction in the direction of the print head (not shown) of the printing unit 10 and lead to faults. In order to counteract these shock waves, a damping device shown overall with the reference numeral 24 is provided. The damping device 24 comprises a curved damping plate 26, which is assigned to a guide surface 28 of the input section 12. The damping plate 26 and the guide surface 28 delimit an insertion slot 30 tapering in the transport direction for the flat material web to be cut into sections. The damping plate 26 is articulated on the fastening device 8 so as to be pivotable about an axis 31 running transversely to the transport direction and is prestressed in the direction of the guide surface 28 by a spiral spring 32. Various holding points 34 are provided for the leg 36 of the spiral spring 32 facing away from the damping plate 26, by means of which the pretensioning force of the damping device 24 can be adjusted. The damping plate 26 is supported against the guide surface 28, the guide plate 26 not resting on the guide surface 28 with an edge running transversely to the transport direction, but rather touching the guide surface 28 via lateral spacers 38, so that there is a slot-shaped spacing, by which also thin guideways, such as thermal printing paper with a thickness of about 0.18 mm can be introduced in the direction of the cutting unit 6.

Treten nun im Betrieb der Schneideinrichtung Stoßwellen auf, so führen diese zur Auslenkung des nachgiebig vorgespannten Dämpfungsblechs 26, wodurch den Stoßwellen durch geeignete Wahl der Vorspannung so viel Energie entzogen wird, daß sie sich im Bereich des Druckkopfs der Druckeinheit 10 nicht störend auswirken können.If shock waves now occur during operation of the cutting device, these lead to the deflection of the resiliently prestressed damping plate 26, so that as much energy is removed from the shock waves by a suitable choice of the prestress that they cannot have a disruptive effect in the area of the print head of the printing unit 10.

Es wird nun die verstellbare Befestigung des Gehäuses 2 der Schneideinrichtung an der Druckeinheit 10 beschrieben. Die Befestigungsvorrichtung 8 umfaßt einen insgesamt mit dem Bezugszeichen 40 bezeichneten Halteabschnitt, der auf seiner von dem Gehäuse 2 abgewandten Seite eine Ankerplatte 42 aufweist, welche in eine komplementär ausgebildete Aufnahme 44 der Druckeinheit 10 einschiebbar ist. Die Ankerplatte 42 umfaßt zwei Gewindebolzen 46, die eine Öffnung 48 des Halteabschnitts 40 in Richtung auf das Gehäuse 2 durchgreifen und an ihrem freien Ende mit einer Mutter 50 verschraubt sind. Durch Festziehen der Mutter 50 kann der Halteabschnitt 40 ortsfest an der Druckeinheit 10 fixiert werden; erst hiernach wird das Gehäuse 2 mit der Schneideinheit 6 montiert.The adjustable fastening of the housing 2 of the cutting device to the printing unit 10 will now be described. The fastening device 8 comprises a holding section, designated overall by reference numeral 40, which has on its side facing away from the housing 2 an anchor plate 42 which can be inserted into a complementarily designed receptacle 44 of the printing unit 10. The anchor plate 42 comprises two threaded bolts 46 which pass through an opening 48 of the holding section 40 in the direction of the housing 2 and are screwed to a nut 50 at their free end. By tightening the nut 50, the holding section 40 can be fixed in place on the printing unit 10; only then is the housing 2 assembled with the cutting unit 6.

Der Halteabschnitt 40 weist desweiteren zwei parallele, in Richtung auf das Gehäuse 2 vorspringende Bolzen 52 auf, die über stirnseitige Gewindebohrungen 54 und Schrauben 56 an dem Halteabschnitt 40 befestigt sind. Die Bolzen 52 halten und führen das Gehäuse 2. Hierzu sind in dem Gehäuse 2 Durchgangsöffnungen 60 vorgesehen, durch welche sich die Bolzen 52 hindurcherstrecken, wenn das Gehäuse 2 auf diese aufgeschoben wird. Die durch das Gehäuse hindurchgreifenden freien Enden 62 der Bolzen 52 sind über stirnseitige Gewindebohrungen 64 und Schrauben 66 mit einem plattenförmigen Referenzelement 68 verbunden. Das Gehäuse 2 ist auf den Bolzen 52 verschieblich gelagert, wobei einerseits das Referenzelement 68 und andererseits eine einen axialen Anschlag 70 bildende Hülse 72, die auf einen Bolzen 52 aufgeschoben und zwischen dem Gehäuse 2 und dem Halteabschnitt 40 angeordnet ist, eine Begrenzung bilden. Zur Einstellung der Position des Gehäuses 2 gegenüber dem Halteabschnitt 40 ist eine Stellschraube 74 vorgesehen, die sich von außen durch eine gewindelose Durchgangsöffnung 76 in dem Referenzelement 68 hindurcherstreckt und in einen Außengewindeabschnitt 78 innerhalb des Gehäuses 2 eingeschraubt ist. Die Stellschraube 74 ist bezüglich der gewindelosen Durchgangsöffnung 76 in dem Referenzelement 68 drehbar, und sie ist mittels einer Ringscheibe und einer Zahnfederscheibe in axialer Richtung mit dem Referenzelement derart gekoppelt, daß bei Einschrauben oder Ausschrauben der Stellschraube 74 in bzw. aus dem Gewindeabschnitt 78 das Gehäuse 2 in Richtung auf das Referenzelement 68 bzw. von diesem weg in Richtung auf den Anschlag 70 der Hülse 72 bewegt wird. Auf diese Weise läßt sich eine Feineinstellung der Entfernung des Schneidabschnitts 14 von dem Druckkopf der Druckeinheit 10 erreichen. Das Gehäuse 2 ist dabei im wesentlichen spielfrei auf den Bolzen 52 geführt und durch die von Referenzelement 68, Stellschraube 74 und Tnnengewindeabschnitt 78 gebildete Verstelleinrichtung 80 einstellbar.The holding section 40 furthermore has two parallel bolts 52 which project in the direction of the housing 2 and which are fastened to the holding section 40 via threaded bores 54 and screws 56 on the end face. The bolts 52 hold and guide the housing 2. For this purpose, through openings 60 are provided in the housing 2, through which the bolts 52 extend when the housing 2 is pushed onto them. The free ends 62 of the bolts 52 which pass through the housing are connected to a plate-shaped reference element 68 via threaded bores 64 and screws 66 on the end face. The housing 2 is displaceably mounted on the bolt 52, with on the one hand the reference element 68 and on the other hand a sleeve 72 forming an axial stop 70, which is pushed onto a bolt 52 and between the housing 2 and the holding section 40 is arranged to form a boundary. To adjust the position of the housing 2 relative to the holding section 40, an adjusting screw 74 is provided, which extends from the outside through a non-threaded through opening 76 in the reference element 68 and is screwed into an externally threaded section 78 within the housing 2. The set screw 74 is rotatable with respect to the unthreaded through opening 76 in the reference element 68, and it is coupled in the axial direction to the reference element by means of an annular disk and a toothed spring washer such that when the set screw 74 is screwed in or unscrewed into or out of the threaded section 78, the housing 2 is moved in the direction of the reference element 68 or away from it in the direction of the stop 70 of the sleeve 72. In this way, a fine adjustment of the distance of the cutting section 14 from the print head of the printing unit 10 can be achieved. The housing 2 is guided essentially free of play on the bolt 52 and can be adjusted by the adjusting device 80 formed by reference element 68, adjusting screw 74 and internal thread section 78.

Claims (14)

Schneideinrichtung für eine geförderte Flachmaterialbahn, insbesondere zur Herstellung von Etiketten, wobei die Schneideinrichtung einen Eingabeabschnitt (12), einen Schneidabschnitt (14), einen Ausgabeabschnitt (16), sowie eine dem Eingabeabschnitt (12) zugeordnete, der Flachmaterialbahn zugewandte Dämpfungsvorrichtung (24) aufweist, dadurch gekennzeichnet, daß die Dämpfungsvorrichtung (24) zur Aufnahme und Dämpfung infolge des Schneidvorgangs auftretender Stoßwellen bei der Flachmaterialbahn von einer Dämpfungsplatte oder einem Dämpfungsblech (26) gebildet ist.Cutting device for a conveyed flat material web, in particular for producing labels, the cutting device having an input section (12), a cutting section (14), an output section (16) and a damping device (24) assigned to the input section (12) and facing the flat material web , characterized in that the damping device (24) for receiving and damping shock waves occurring as a result of the cutting process in the flat material web is formed by a damping plate or a damping plate (26). Schneideinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Dämpfungsplatte oder das -blech (26) gebogen ausgebildet ist.Cutting device according to claim 1, characterized in that the damping plate or sheet (26) is curved. Schneideinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Dämpfungsplatte oder das -blech (26) schwenkbar angeordnet und von bei der Flachmaterialbahn auftretenden Stoßwellen auslenkbar ist.Cutting device according to claim 1 or 2, characterized in that the damping plate or sheet (26) is pivotally arranged and can be deflected by shock waves occurring in the flat material web. Schneideinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Dämpfungsvorrichtung (24) in Richtung auf die Flachmaterialbahn vorgespannt ist.Cutting device according to at least one of the preceding claims, characterized in that the damping device (24) is prestressed in the direction of the flat material web. Schneideinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Vorspannkraft der Dämpfungsvorrichtung (24) einstellbar ist.Cutting device according to claim 4, characterized in that the biasing force of the damping device (24) is adjustable. Schneideinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Verstellbarkeit der Vorspannkraft der Dämpfungsvorrichtung (24) durch verschiedene Positionierungen eines Schenkels (36) einer Feder (32) erreicht wird.Cutting device according to claim 5, characterized in that the adjustability of the biasing force of the damping device (24) is achieved by different positioning of one leg (36) of a spring (32). Schneideinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Dämpfungsvorrichtung (24) zugleich als Leitmittel dient.Cutting device according to at least one of the preceding claims, characterized in that the damping device (24) also serves as a guide. Schneideinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Eingabeabschnitt (12) einen in Transportrichtung sich verjüngenden Einführschlitz (30) aufweist, der zumindest einerseits von der Dämpfungsplatte oder dem -blech (26) begrenzt ist.Cutting device according to at least one of the preceding claims, characterized in that the input section (12) has an insertion slot (30) which tapers in the transport direction and which is delimited at least on the one hand by the damping plate or sheet (26). Schneideinrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Einführschlitz (30) auf der der Dämpfungsplatte oder dem -blech (26) gegenüberliegenden Seite von einer Führungsfläche (28) begrenzt ist.Cutting device according to claim 8, characterized in that the insertion slot (30) on the side opposite the damping plate or sheet (26) is delimited by a guide surface (28). Schneideinrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Dämpfungsplatte oder das -blech (26) auf der Führungsfläche (28) aufliegt.Cutting device according to claim 9, characterized in that the damping plate or sheet (26) rests on the guide surface (28). Schneideinrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die Dämpfungsplatte oder das -blech (26) über seitliche Abstandshalter (38) auf der Führungsfläche (28) aufliegt.Cutting device according to claim 10, characterized in that the damping plate or sheet (26) rests on the guide surface (28) via lateral spacers (38). Schneideinrichtung nach wenigstens einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß der lichte Querschnitt des Einführschlitzes (30) eine geringste Erstreckung quer zur Bahnebene aufweist, die geringfügig größer ist als die Dicke der Bahn.Cutting device according to at least one of claims 8 to 11, characterized in that the clear cross-section of the insertion slot (30) has the smallest extent transversely to the web plane, which is slightly larger than the thickness of the web. Schneideinrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die Dämpfungsplatte oder das -blech (26) einen kleinsten Abstand von der Führungsfläche von 0,35 bis 2mm, vorzugsweise von 0,5 bis 1mm aufweist.Cutting device according to claim 12, characterized in that the damping plate or plate (26) has a smallest distance from the guide surface of 0.35 to 2mm, preferably 0.5 to 1mm. Schneideinrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß sie an eine Druckeinheit ankoppelbar ist.Cutting device according to one of claims 1 to 13, characterized in that it can be coupled to a printing unit.
EP96117476A 1995-11-06 1996-10-31 Cutting device for webs of flat material Expired - Lifetime EP0771624B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995141104 DE19541104C1 (en) 1995-11-06 1995-11-06 Continuous material web cutting device for producing tickets
DE19541104 1995-11-06

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EP0771624A2 true EP0771624A2 (en) 1997-05-07
EP0771624A3 EP0771624A3 (en) 1998-02-18
EP0771624B1 EP0771624B1 (en) 2000-01-05

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US8206783B2 (en) 2002-08-28 2012-06-26 Pipe Restoration Technologies, Llc Barrier coating corrosion control methods and systems for interior piping systems
US8343579B2 (en) 2002-08-28 2013-01-01 Pipe Restoration Technologies, Llc Methods and systems for coating and sealing inside of piping systems
US8524320B1 (en) 2002-08-28 2013-09-03 Pipe Restoration Technologies, Llc Process for coating the interior surface of water service lines

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CN112318605B (en) * 2020-10-28 2023-12-22 上海金标生物科技有限公司 Percolating membrane cutting and conveying device and method

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DE2364035A1 (en) 1973-01-26 1974-08-01 Moore Business Forms Inc DEVICE FOR CUTTING RAIL-SHAPED MATERIAL
GB2169237A (en) 1985-01-09 1986-07-09 Monarch Marking Systems Inc Cutting mechanisms and methods of cutting and stacking record members
DE3642562A1 (en) 1986-01-09 1987-07-16 Monarch Marking Systems Inc LABEL BUNDING DEVICE

Cited By (4)

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Publication number Priority date Publication date Assignee Title
US8206783B2 (en) 2002-08-28 2012-06-26 Pipe Restoration Technologies, Llc Barrier coating corrosion control methods and systems for interior piping systems
US8343579B2 (en) 2002-08-28 2013-01-01 Pipe Restoration Technologies, Llc Methods and systems for coating and sealing inside of piping systems
US8354140B2 (en) 2002-08-28 2013-01-15 Pipe Restoration Technologies, Llc Barrier coating corrosion control methods and systems for interior piping systems
US8524320B1 (en) 2002-08-28 2013-09-03 Pipe Restoration Technologies, Llc Process for coating the interior surface of water service lines

Also Published As

Publication number Publication date
DE19549432A1 (en) 1997-05-07
DE59604750D1 (en) 2000-04-27
DE19549432C2 (en) 2002-02-28
DE59604105D1 (en) 2000-02-10
EP0771624B1 (en) 2000-01-05
EP0771624A3 (en) 1998-02-18

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