EP0305657B1 - Method and apparatus for producing cuts from elastic paper - Google Patents

Method and apparatus for producing cuts from elastic paper Download PDF

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Publication number
EP0305657B1
EP0305657B1 EP88108652A EP88108652A EP0305657B1 EP 0305657 B1 EP0305657 B1 EP 0305657B1 EP 88108652 A EP88108652 A EP 88108652A EP 88108652 A EP88108652 A EP 88108652A EP 0305657 B1 EP0305657 B1 EP 0305657B1
Authority
EP
European Patent Office
Prior art keywords
rollers
paper webs
cutting
paper
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88108652A
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German (de)
French (fr)
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EP0305657A3 (en
EP0305657A2 (en
Inventor
Heinrich Schmidt
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.)
Melitta Haushaltsprodukte GmbH and Co KG
Original Assignee
Melitta Haushaltsprodukte GmbH and Co KG
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Publication date
Application filed by Melitta Haushaltsprodukte GmbH and Co KG filed Critical Melitta Haushaltsprodukte GmbH and Co KG
Priority to AT88108652T priority Critical patent/ATE78753T1/en
Publication of EP0305657A2 publication Critical patent/EP0305657A2/en
Publication of EP0305657A3 publication Critical patent/EP0305657A3/en
Application granted granted Critical
Publication of EP0305657B1 publication Critical patent/EP0305657B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/01—Cutting 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
    • B26D1/12—Cutting 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
    • B26D1/14—Cutting 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 circular cutting member, e.g. disc cutter
    • B26D1/22—Cutting 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 circular cutting member, e.g. disc cutter coacting with a movable member, e.g. a roller
    • B26D1/225—Cutting 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 circular cutting member, e.g. disc cutter coacting with a movable member, e.g. a roller for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/30—Shape of flexible containers pointed or tapered
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0405—With preparatory or simultaneous ancillary treatment of work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0491—Cutting of interdigitating products
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0515—During movement of work past flying cutter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0524—Plural cutting steps
    • Y10T83/0529—Blanking and cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/06—Blanking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6476—Including means to move work from one tool station to another
    • Y10T83/6489—Slitter station
    • Y10T83/6491—And transverse cutter station
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7809—Tool pair comprises rotatable tools

Definitions

  • the invention relates to a method for producing blanks from an elastic paper, for example from a creped paper, paper webs drawn off from a roll being brought together in pairs one above the other and then the blanks being cut out in a rotary cutter comprising two rollers.
  • the invention further relates to an apparatus for performing such a method.
  • the present invention has for its object to develop a method for producing blanks from an elastic paper, preferably a creped paper, in which web tension problems are avoided in a simple manner and which overall enables extremely economical production of blanks.
  • This object is achieved in that first all paper webs are pulled from a common mother roll and formed by cutting the stripped mother roll web and then two paper webs are brought together and then cut alternately starting from the two sides of the superimposed paper webs in the rotary cutter.
  • a device for carrying out the method, comprising a roll holder and a rotary cutting device comprising two rolls, the rolls of which are designed as transport rolls at least on a partial area of their circumference, is characterized in that both rolls are provided with cutting knives arranged offset in the circumferential direction and in their cutting knife-free areas are designed as counter-rollers for the cutting knife-equipped areas of the other roller.
  • Such a rotary cutter of a corresponding device allows on the one hand the problem-free transport of the two superimposed paper webs and on the other hand the equally perfect and mutual cutting of the superimposed paper webs leading to the tension compensation.
  • FIG. 1 shows a schematic illustration of an apparatus for producing blanks from creped paper. Overall, this device is provided with reference number 10.
  • the essential components of this device initially include a roll holder 11 for a mother roll 12, a cutting mechanism 13 for longitudinally cutting the mother roll web 12a drawn off from the mother roll 12 into two individual paper webs, two folding stations 15 for folding together the two paper webs 14, two embossing stations 16 for embossing cutting boundary lines in the Area of the folded paper webs 14 and a rotary cutter 17 in which the two folded, embossed paper webs 14 are brought together and cut.
  • the rotary cutter 17 is shown in FIGS. 2 to 4.
  • This rotary cutter 17 comprises two rollers 18 and 19, each of which is provided with cutting knives 20 and 21, respectively.
  • each roller 18 and 19 each extend only over a partial area of the circumference of said rollers 18 and 19.
  • this area equipped with cutting knives 20 and 21 corresponds in each case to approximately half the circumference of the two cutting rollers 18 and 19.
  • FIG 4 also makes it clear that the cutting knives 20 and 21 of the two rollers 18 and 19 are offset from one another in the circumferential direction.
  • rollers 18 and 19 are designed as counter-rollers for the areas of the other roller equipped with the cutting knife.
  • rollers 18 and 19 are designed as transport rollers in a known and therefore not shown in detail.
  • FIG. 4 also shows very clearly that with a rotary cutter 17 designed in this way, two superimposed paper webs 14 are cut alternately starting from the two sides of the superimposed paper webs 14.
  • the two cutting knives 20 and 21 of the two rollers 18 and 19 are to be designed in mirror image to one another in order to always achieve the same cut shape, regardless whether to cut with the roller 18 or the roller 19.
  • the shape of these bag-like blanks 22 can essentially be described as trapezoidal.
  • the rotary knives 23 of this cutting mechanism 13a have a wave shape, as seen in the circumferential direction, so that there is a wave shape in the region of the cutting edges with respect to the paper webs 14 cut from the mother roll web 12a.
  • This waveform permits a largely waste-free arrangement of the individual blanks 23, which partially overlaps in the longitudinal direction of the paper webs 14, which FIG. 6 shows very clearly.
  • the two folded and embossed paper webs 14 are brought together and placed one above the other in the rotary cutter 17, the structure and mode of operation of which were explained above.

Landscapes

  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Making Paper Articles (AREA)
  • Luminescent Compositions (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Earth Drilling (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Replacement Of Web Rolls (AREA)
  • Laminated Bodies (AREA)
  • Sanitary Thin Papers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Collation Of Sheets And Webs (AREA)
  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The intention is to develop a method for producing cuts from an elastic paper, preferably a crêpe paper, by means of which it is possible for cuts to be made from two superposed paper webs (14) in common rotary slitting rollers (17) in a cost-effective manner and avoiding web-tensioning problems. <??>For this purpose, it is envisaged firstly to take all the paper webs (14) off a common parent roll (12), to form the individual paper webs by longitudinal cutting of the parent-roll web (12), and then to bring the said webs together and to cut them in an alternate manner from the two sides of the superposed paper webs (14) in the rotary slitting rollers (17). <??>As a result of the alternate cutting in the rotary slitting rollers (17), web-tensioning problems are avoided in the individual paper webs (14). The use of a parent roll (12) is, in terms of manufacture, advantageous compared with the use of corresponding single rolls. <??>The rotary slitting rollers (17) of a corresponding device are composed of two rollers which are both designed as cutting and counter-rollers and are employed alternately. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Zuschnitten aus einem elastischen Papier, beispielsweise aus einem gekreppten Papier, wobei von einer Rolle abgezogene Papierbahnen paarweise aufeinanderliegend zusammengeführt und dann die Zuschnitte in einem zwei Walzen umfassenden Rotationsschneidwerk ausgeschnitten werden.The invention relates to a method for producing blanks from an elastic paper, for example from a creped paper, paper webs drawn off from a roll being brought together in pairs one above the other and then the blanks being cut out in a rotary cutter comprising two rollers.

Die Erfindung bezieht sich weiterhin auf eine Vorrichtung zur Durchführung eines derartigen Verfahrens.The invention further relates to an apparatus for performing such a method.

Das Herstellen von Zuschnitten aus übereinanderliegenden Papierbahnen durch gemeinsames Ausschneiden der Zuschnitte innerhalb eines zwei Walzen umfassenden Rotationsschneidwerkes ist an sich bekannt. Bei den bislang eingesetzten Rotationsschneidwerken ist immer eine Schneidwalze und eine schneidmesserfreie Gegenseite vorgesehen, so daß also der jeweilige Schnitt immer von einer Seite der übereinanderliegenden Papierbahnen ausgehend geführt wird.The production of blanks from superimposed paper webs by cutting out the blanks together within a rotary cutter comprising two rollers is known per se. In the rotary cutting units used up to now, a cutting roller and a counter side free of cutting knives are always provided, so that the respective cut is always made starting from one side of the superimposed paper webs.

Sofern Papiere äußerst geringer Elastizität verarbeitet werden, ist dieses Verfahren problemlos auszuführen.If papers of extremely low elasticity are processed, this procedure can be carried out without any problems.

Sobald aber ein elastisches Papier, beispielsweise ein gekrepptes Papier, mit einer relativ hohen Elstizität zur Verarbeitung kommt. entstehen Bahnspannungsprobleme dadurch, daß diejenige Papierbahn, die als erste durchschnitten wird, kurzzeitig einem geringeren Zug ausgesetzt ist als die an der Gegenseite anliegende Papierbahn.But as soon as an elastic paper, for example a creped paper, with a relatively high elasticity is processed. Web tension problems arise because the paper web that is cut through first is briefly subjected to a lower tension than the paper web lying on the opposite side.

Um die auf diese Weise entstehenden unterschiedlichen Bahnspannungen ausgleichen zu können, hat man bislang das Verfahren der gattungsgemäßen Art nur anwenden können, wenn von zwei separaten Rollen gearbeitet wird, welche unabhängig voneinander bremsbar sind.In order to be able to compensate for the different web tensions which arise in this way, the method of the generic type has hitherto only been able to be used when working from two separate rollers which can be braked independently of one another.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von Zuschnitten aus einem elastischen Papier, vorzugsweise einem gekreppten Papier, zu entwickeln, bei dem Bahnspannungsprobleme auf einfache Art und Weise vermieden werden und welches insgesamt eine äußerst wirtschaftliche Herstellung von Zuschnitten ermöglicht.The present invention has for its object to develop a method for producing blanks from an elastic paper, preferably a creped paper, in which web tension problems are avoided in a simple manner and which overall enables extremely economical production of blanks.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zunächst alle Papierbahnen von einer gemeinsamen Muterrolle abgezogen und durch Längsschneiden der abgezogenen Mutterrollen- Bahn gebildet und dann jeweils zwei Papierbahnen zusammengeführt und anschließend im Rotationsschneidwerk wechselweise von den beiden Seiten der übereinanderliegenden Papierbahnen ausgehend geschnitten werden.This object is achieved in that first all paper webs are pulled from a common mother roll and formed by cutting the stripped mother roll web and then two paper webs are brought together and then cut alternately starting from the two sides of the superimposed paper webs in the rotary cutter.

Durch den erfindungsgemäß vorgeschlagenen Wechselschnitt der übereinanderliegenden Papierbahnen erfolgt im ständigen Wechsel ein Spannungsausgleich zwischen den beiden Papierbahnen, so daß unterschiedliche Bahnspannungen und damit verbundene Faltenbildung oder ein sogenanntes Verlaufen der Papierbahnen ausgeschlossen ist. Dies wiederum ist Voraussetzung dafür, daß in wirtschaftlich vorteilhafter Weise von einer Mutterrolle gearbeitet werden kann, da beim Arbeiten von einer Mutterrolle das unterschiedlich starke Abbremsen der einzelnen Papierbahnen nicht möglich ist.Due to the proposed alternating cut of the superimposed paper webs, there is constant tension compensation between the two paper webs, so that different web tensions and associated wrinkling or a so-called running of the paper webs is excluded. This, in turn, is a prerequisite for being able to work from a parent roll in an economically advantageous manner, since it is not possible to brake the individual paper webs to different degrees when working from a parent roll.

Andererseits ist die Verwendung einer einzigen Muterrolle in jeder Beziehung vorteilhaft, nicht zuletzt deshalb, weil lediglich eine Halterungsmöglichkeit für die Mutterrolle benötigt wird.On the other hand, the use of a single parent role is advantageous in every respect, not least because only one mounting option for the parent role is required.

Eine erfindungsgemäße Vorrichtung zur Durchführung des Verfahrens, umfassend einen Rollenhalter sowie ein zwei Walzen umfassendes Rotationsschneidwerk, dessen Walzen zumindest auf einem Teilbereich ihres Umfanges als Transportwalzen ausgebildet sind, ist dadurch gekennzeichnet, daß beide Walzen mit in Umfangsrichtung gesehen gegeneinander versetzt angeordneten Schneidmessern versehen sind und in ihren schneidmesserfreien Bereichen als Gegenwalzen für die schneidmesserbestückten Bereiche der jeweils anderen Walze ausgebildet sind.A device according to the invention for carrying out the method, comprising a roll holder and a rotary cutting device comprising two rolls, the rolls of which are designed as transport rolls at least on a partial area of their circumference, is characterized in that both rolls are provided with cutting knives arranged offset in the circumferential direction and in their cutting knife-free areas are designed as counter-rollers for the cutting knife-equipped areas of the other roller.

Ein derart ausgebildetes Rotationsschneidwerk einer entsprechenden Vorrichtung gestattet einerseits den einwandfreien Transport der beiden übereinanderliegenden Papierbahnen und andererseits das ebenso einwandfreie und zum Bahnspannungsausgleich führende, wechselseitige Schneiden der übereinanderliegenden Papierbahnen.Such a rotary cutter of a corresponding device allows on the one hand the problem-free transport of the two superimposed paper webs and on the other hand the equally perfect and mutual cutting of the superimposed paper webs leading to the tension compensation.

Weitere Merkmale der Erfindung sind Gegenstand von Unteransprüchen.Further features of the invention are the subject of dependent claims.

Anhand der beiliegenden Zeichnungen wird das erfindungsgemäße Verfahren im Folgenden ebenso näher erläutert wie eine erfindungsgemäße Vorrichtung zur Durchführung des Verfahrens.The method according to the invention is explained in more detail below with the aid of the accompanying drawings, as is an apparatus according to the invention for carrying out the method.

Im einzelnen zeigen:

Figur 1
eine perspektivisch dargestellte, schematische Darstellung einer Vorrichtung zur Herstellung von Zuschnitten aus zwei übereinanderliegenden Papierbahnen,
Figur 2
eine stark schematisierte, perspektivische Darstellung eines Rotationsschneidwerkes für eine Vorrichtung gemäß Figur 1,
Figur 3
eine weitere, perspektivische Darstellung des Rotationsschneidwerkes gemäß Figur 2 mit einer Abwicklung der beiden Walzen des Rotationsschneidwerkes,
Figur 4
einen schematisch dargestellten Schnitt durch die beiden Walzen des Rotationsschneidwerkes gemäß den Figuren 2 und 3,
Figur 5
eine Draufsicht auf die im Rotationsschneidwerk gemäß den Figuren 2 bis 4 aufzuschneidenden übereinanderliegenden Papierbahnen,
Figur 6
ein Schneidwerk zum Längsschneiden einer von einer Mutterrolle abgezogenen Mutterrollen-Bahn nach einem weiteren Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung.
In detail show:
Figure 1
2 shows a perspective, schematic representation of a device for producing blanks from two superimposed paper webs,
Figure 2
2 shows a highly schematic, perspective illustration of a rotary cutting mechanism for a device according to FIG. 1,
Figure 3
2 shows another perspective view of the rotary cutting unit according to FIG. 2 with the two rollers of the rotary cutting unit being developed,
Figure 4
3 shows a schematically represented section through the two rollers of the rotary cutting mechanism according to FIGS. 2 and 3,
Figure 5
2 shows a plan view of the paper webs lying one above the other in the rotary cutter according to FIGS. 2 to 4,
Figure 6
a cutting device for longitudinally cutting a mother roll web drawn off from a parent roll according to a further exemplary embodiment of a device according to the invention.

In Figur 1 ist eine schematische Darstellung einer Vorrichtung zur Herstellung von Zuschnitten aus einem gekreppten Papier gezeigt. Diese Vorrichtung ist insgesamt mit dem Bezugszeichen 10 versehen.FIG. 1 shows a schematic illustration of an apparatus for producing blanks from creped paper. Overall, this device is provided with reference number 10.

Als wesentliche Bauteile enthält diese Vorrichtung zunächst einen Rollenhalter 11 für eine Mutterrolle 12, ein Schneidwerk 13 zum Längsschneiden der von der Mutterrolle 12 abgezogenen MutterrollenBahn 12a in zwei einzelne Papierbahnen zwei Faltstationen 15 zum Zusammenfalten der beiden Papierbahnen 14, zwei Prägestationen 16 zum Prägen von Zuschnittsbegrenzungslinien im Bereich der zusammengefalteten Papierbahnen 14 sowie ein Rotationsschneidwerk 17, in dem die beiden gefalteten, geprägten Papierbahnen 14 zusammengeführt und geschnitten werden.The essential components of this device initially include a roll holder 11 for a mother roll 12, a cutting mechanism 13 for longitudinally cutting the mother roll web 12a drawn off from the mother roll 12 into two individual paper webs, two folding stations 15 for folding together the two paper webs 14, two embossing stations 16 for embossing cutting boundary lines in the Area of the folded paper webs 14 and a rotary cutter 17 in which the two folded, embossed paper webs 14 are brought together and cut.

Das Rotationsschneidwerk 17 ist in den Figuren 2 bis 4 gezeigt. Dieses Rotationsschneidwerk 17 umfaßt zwei Walzen 18 und 19, von denen jede mit Schneidmessern 20 bzw. 21 versehen ist.The rotary cutter 17 is shown in FIGS. 2 to 4. This rotary cutter 17 comprises two rollers 18 and 19, each of which is provided with cutting knives 20 and 21, respectively.

Wie insbesondere Figur 4 deutlich macht, erstrecken sich die Schneidmesser 20 bzw. 21 jeder Walze 18 bzw. 19 jeweils nur über einen Teilbereich des Umfanges der besagten Walzen 18 und 19.As is particularly clear in FIG. 4, the cutting knives 20 and 21 of each roller 18 and 19 each extend only over a partial area of the circumference of said rollers 18 and 19.

Im dargestellten Ausführungsbeispiel entspricht dieser mit Schneidmessern 20 bzw. 21 bestückte Bereich jeweils etwa der Hälfte des Umfanges der beiden Schneidwalzen 18 bzw. 19.In the exemplary embodiment shown, this area equipped with cutting knives 20 and 21 corresponds in each case to approximately half the circumference of the two cutting rollers 18 and 19.

Figur 4 macht außerdem deutlich, daß die Schneidmesser 20 und 21 der beiden Walzen 18 und 19 in Umfangsrichtung gesehen gegeneinander versetzt sind.Figure 4 also makes it clear that the cutting knives 20 and 21 of the two rollers 18 and 19 are offset from one another in the circumferential direction.

Im jeweils schneidmesserfreien Bereich sind die Walzen 18 und 19 als Gegenwalzen für die schneidmesserbestückten Bereiche der jeweils anderen Walze ausgebildet.In the area free of the cutting knife, the rollers 18 and 19 are designed as counter-rollers for the areas of the other roller equipped with the cutting knife.

Darüber hinaus sind die beiden Walzen 18 und 19 in bekannter und deshalb nicht im einzelnen dargestellter Weise als Transportwalzen gestaltet.In addition, the two rollers 18 and 19 are designed as transport rollers in a known and therefore not shown in detail.

Figur 4 zeigt weiterhin sehr anschaulich, daß mit einem derart konzipierten Rotationsschneidwerk 17 zwei übereinanderliegende Papierbahnen 14 jeweils wechselweise von den beiden Seiten der übereinanderliegenden Papierbahnen 14 ausgehend geschnitten werden.FIG. 4 also shows very clearly that with a rotary cutter 17 designed in this way, two superimposed paper webs 14 are cut alternately starting from the two sides of the superimposed paper webs 14.

Sofern aus den Papierbahnen 14 Zuschnitte 22 ausgeschnitten werden sollen, welche rechtwinklig zur Transportrichtung der beiden Papierbahnen 14 keine Symmetrieachse aufweisen, sind die beiden Schneidmesser 20 und 21 der beiden Walzen 18 und 19 spiegelbildlich zueinander zu gestalten, um immer die gleiche Zuschnittsform zu erreichen, gleichgültig, ob mit der Walze 18 oder der Walze 19 geschnitten wird.If cuts 22 are to be cut out of the paper webs 14, which have no axis of symmetry at right angles to the transport direction of the two paper webs 14, the two cutting knives 20 and 21 of the two rollers 18 and 19 are to be designed in mirror image to one another in order to always achieve the same cut shape, regardless whether to cut with the roller 18 or the roller 19.

Eine derartige Gestaltung ist beispielsweise dann erforderlich, wenn, wie im dargestellten Ausführungsbeispiel gezeigt, Zuschnitte 22 in Tütenform hergestellt werden sollen.Such a design is required, for example, if, as shown in the exemplary embodiment shown, blanks 22 are to be produced in the form of bags.

Die Form dieser tütenartigen Zuschnitte 22 kann im wesentlichen als trapezförmig bezeichnet werden.The shape of these bag-like blanks 22 can essentially be described as trapezoidal.

Bei einer derartigen Zuschnittsform ist die Verwendung eines Schneidwerkes 13a gemäß Figur 6 zur Aufteilung bzw. zum Längsschneiden der Mutterrollen-Bahn 12a zweckmäßig.In the case of such a cutting shape, the use of a cutting mechanism 13a according to FIG. 6 for dividing or for longitudinally cutting the mother roll web 12a is expedient.

Die Rotationsmesser 23 dieses Schneidwerkes 13a weisen -in Umfangsrichtung gesehen- eine Wellenform auf, so daß sich bezüglich der aus der Mutterrollen-Bahn 12a aufgeschnittenen Papierbahnen 14 im Bereich der Schneidkanten eine Wellenform ergibt. Diese Wellenform erlaubt eine weitestgehend abfallarme, in Längsrichtung der Papierbahnen 14 teilweise überlappende Anordnung der einzelnen Zuschnitte 23, was Figur 6 sehr anschaulich zeigt.The rotary knives 23 of this cutting mechanism 13a have a wave shape, as seen in the circumferential direction, so that there is a wave shape in the region of the cutting edges with respect to the paper webs 14 cut from the mother roll web 12a. This waveform permits a largely waste-free arrangement of the individual blanks 23, which partially overlaps in the longitudinal direction of the paper webs 14, which FIG. 6 shows very clearly.

Die wellenförmig geschnittenen Papierbahnen 14 gemäß Figur 6 werden in bekannter Weise in einer Faltstation 15 (siehe Figur 1) entlang ihrer Mittellängskante zusammengefaltet und dann in Prägestationen 16 mit Prägenähten versehen, welche bezüglich der herzustellenden, fertigen Tüte eine Seitennaht und eine Bodennaht bilden. Die Faltkante der zusammengefalteten Papierbahnen 14 bildet eine weitere Seitenkante des fertigen Tütenzuschnittes.6 are folded in a known manner in a folding station 15 (see FIG. 1) along their central longitudinal edge and then provided in embossing stations 16 with embossed seams which form a side seam and a bottom seam with respect to the finished bag to be produced. The folded edge of the folded paper webs 14 forms a further side edge of the finished bag blank.

Nach dem Prägevorgang werden die beiden gefalteten und geprägten Papierbahnen 14 zusammengeführt und übereinanderliegend in das Rotationsschneidwerk 17, dessen Aufbau und Wirkungsweise weiter oben erläutert wurde, eingeführt.After the embossing process, the two folded and embossed paper webs 14 are brought together and placed one above the other in the rotary cutter 17, the structure and mode of operation of which were explained above.

Hier wird nun, wie schon erwähnt, der wechselseitige Abschnitt der Papierbahnen 14 durchgeführt, der zu einem ständigen Ausgleich ab der während des Schneidvorganges unvermeidlich auftretenden unterschiedlichen Bahnspannungen führt.Here, as already mentioned, the mutual section of the paper webs 14 is now carried out, which leads to a constant compensation from the different web tensions that inevitably occur during the cutting process.

Es kann dennoch problemlos von einer gemeinsamen Mutterrolle 12 ausgehend gearbeitet werden.It can still be easily worked from a common parent role 12.

Claims (6)

  1. Method for the production of blanks from an elastic paper, for example from a crêpe paper, wherein paper webs (14) drawn off from a roll (12) are led together in pairwise superimposition and then the blanks are cut out in a rotary cutting mechanism (17) comprising two rollers (18, 19), characterised thereby that initially all paper webs (14) are drawn off from a common mother roll (12) and formed by longitudinal cutting of the drawn-off mother roll web (12a) and then each time two paper webs (14) are led together and subsequently cut in the rotary cutting mechanism (17) proceeding in alternation from the two sides of the superimposed paper webs (14).
  2. Method according to claim 1, characterised thereby that the individual paper webs (14) formed through separation of the mother roll web (12a) are individually folded together in known manner before running into the rotary cutting mechanism (17) and are provided with impressed seams or similar connecting lines.
  3. Method according to claim 1 or 2, characterised thereby that the mother roll web (12a) is divided into individual paper webs (14) in a wave-shaped cut.
  4. Device for carrying out the method according to claim 1, comprising a roll holder as well as a rotary cutting mechanism (17) comprising two rollers (18, 19), the rollers of the mechanism being constructed at least at a part region of their circumference as transport rollers, characterised thereby that the two rollers (18, 19) are provided with cutting knives (20, 21), which are arranged offset relative to one another viewed in circumferential direction, and are constructed in their regions free of cutting knives as counter rollers for that region of the respective other roller (18 or 19) equipped with cutting knife.
  5. Device according to claim 4, characterised thereby that the cutting knives (20, 21) of the rollers (18, 19) are arranged in mirror image to one another.
  6. Device according to claim 4 or 5, characterised thereby that the region of each roller (18, 19) equipped with cutting knife respectively corresponds to an even-numbered portion of the circumference of the roller (18, 19).
EP88108652A 1987-08-29 1988-05-31 Method and apparatus for producing cuts from elastic paper Expired - Lifetime EP0305657B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88108652T ATE78753T1 (en) 1987-08-29 1988-05-31 METHOD FOR PRODUCTION OF BLANKS FROM ELASTIC PAPER, PREFERABLY CREPED PAPER, AND DEVICE FOR CARRYING OUT THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873728888 DE3728888A1 (en) 1987-08-29 1987-08-29 METHOD FOR PRODUCING SECTIONS FROM AN ELASTIC PAPER, PREFERABLY A CREPED PAPER, AND APPARATUS FOR IMPLEMENTING THE METHOD
DE3728888 1987-08-29

Publications (3)

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EP0305657A2 EP0305657A2 (en) 1989-03-08
EP0305657A3 EP0305657A3 (en) 1989-11-23
EP0305657B1 true EP0305657B1 (en) 1992-07-29

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EP88108652A Expired - Lifetime EP0305657B1 (en) 1987-08-29 1988-05-31 Method and apparatus for producing cuts from elastic paper

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US (1) US4932932A (en)
EP (1) EP0305657B1 (en)
JP (1) JPH01159195A (en)
AT (1) ATE78753T1 (en)
BR (1) BR8804380A (en)
DE (2) DE3728888A1 (en)
DK (1) DK368188A (en)
FI (1) FI882855A (en)
MA (1) MA21465A1 (en)
NO (1) NO883825L (en)
ZA (1) ZA886352B (en)

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US20030134123A1 (en) * 1998-11-24 2003-07-17 Moplefan (U.K) Limited. Multilayer polymeric film having unsealed portions with controlled shape
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Also Published As

Publication number Publication date
DE3728888A1 (en) 1989-03-09
JPH01159195A (en) 1989-06-22
ZA886352B (en) 1989-05-30
NO883825D0 (en) 1988-08-26
DE3728888C2 (en) 1992-04-23
NO883825L (en) 1989-03-01
DK368188A (en) 1989-03-01
BR8804380A (en) 1989-04-18
US4932932A (en) 1990-06-12
EP0305657A3 (en) 1989-11-23
EP0305657A2 (en) 1989-03-08
FI882855A (en) 1989-03-01
DE3873217D1 (en) 1992-09-03
ATE78753T1 (en) 1992-08-15
DK368188D0 (en) 1988-07-01
MA21465A1 (en) 1989-10-01
FI882855A0 (en) 1988-06-15

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