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EP1785358B1 - Verpackungsfolie mit Registriermarke - Google Patents

Verpackungsfolie mit Registriermarke Download PDF

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Publication number
EP1785358B1
EP1785358B1 EP05110776A EP05110776A EP1785358B1 EP 1785358 B1 EP1785358 B1 EP 1785358B1 EP 05110776 A EP05110776 A EP 05110776A EP 05110776 A EP05110776 A EP 05110776A EP 1785358 B1 EP1785358 B1 EP 1785358B1
Authority
EP
European Patent Office
Prior art keywords
lines
crease
register mark
respect
web
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.)
Not-in-force
Application number
EP05110776A
Other languages
English (en)
French (fr)
Other versions
EP1785358A1 (de
Inventor
Paolo Benedetti
Massimo Brighenti
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to DE602005021227T priority Critical patent/DE602005021227D1/de
Priority to AT05110776T priority patent/ATE467569T1/de
Priority to ES05110776T priority patent/ES2345936T3/es
Priority to EP05110776A priority patent/EP1785358B1/de
Priority to PCT/EP2006/068414 priority patent/WO2007057379A1/en
Publication of EP1785358A1 publication Critical patent/EP1785358A1/de
Application granted granted Critical
Publication of EP1785358B1 publication Critical patent/EP1785358B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4266—Folding lines, score lines, crease lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/064—Rectangular containers having a body with gusset-flaps folded outwardly or adhered to the side or the top of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4212—Information or decoration elements, e.g. content indicators, or for mailing

Definitions

  • the present invention relates to a sheet packaging material, according to the preamble of claim 1, in particular web packaging material for packaging pourable food products, having a register mark for detecting the position of the material in a packaging machine.
  • packages containing pourable food products such as milk, fruit juice, tomato sauce or wine are made in packaging machines from a web of packaging material or from sheet material blanks.
  • the web which is fed off a reel and sterilized through an aseptic chamber, is longitudinally bent and sealed to form a continuous, vertical tube which is filled with the food product and transversally sealed to form so-called pillow packs by pairs of sealing jaws that are cyclically brought into contact with the tube.
  • Pillow packs are then separated from one another by cutting along the transversal sealing lines, and folded into their fmal, substantially parallelepiped shape.
  • the web material is subjected to folding steps along predetermined creasing lines that are embossed on the web material; in order to ensure that the forming steps are performed in register with the crease line pattern, the web longitudinal position is detected by sensing the position of optically detectable indicia, e.g. printed marks, that are repeated along the web packaging material at a pitch (repeatlength) that is equal to the repeatlength of the crease pattern.
  • a so-called "design correction" device acts on the packages being formed to draw more or less material in the feed direction.
  • Print marks to detect the longitudinal position of the web material have been used for many years, are simple to produce and easy to read; in facts, the printed mark is simply a portion of the package design and thus does not bring about any additional cost. However, being a portion of the printed design means that the register mark itself is not perfectly in register with the crease pattern, because printing and creasing steps are two different, successive steps in web material production and, although relative shifts between the two steps are kept to a minimum, there are inherent tolerances in the production process.
  • EP-A-0 772 760 discloses a method and device for detecting the position of a crease line of a packaging web material by means of a laser reflection technology, in particular by using two photodetectors detecting the light reflected by the material along two directions inclined with respect to the light incidence direction and by processing the signals thus obtained.
  • a crease line is used as a "register mark"
  • the position of the web material in a given, e.g. longitudinal, direction can be detected by this method, provided that the line is correctly identified with respect to the other crease lines forming the crease line pattern.
  • the position of the web material in a transversal direction perpendicular to the feed direction must generally be controlled; this is the case both when the web material is still flat but undergoes preliminary operations in the machine, such as cutting, applying removable tabs or opening devices, and when the tube is already formed, to control "tube twist", i.e. torsional movement of the tube about its longitudinal axis.
  • optically readable indicia are used in these cases, such as the position of a web edge, or prelaminated holes for opening devices, or the longitudinal seal of the tube; however, these indicia are difficult to detect, and in any case require dedicated sensors.
  • WO 03/037729 and WO 03/037722 disclose the use of crease lines for detecting both the longitudinal and transverse position of the web material.
  • the solution provided is not entirely satisfactory because it has proven to be difficult to "select” the right crease lines to be detected among the various lines constituting the crease pattern without triggering a "reading window” by means of a printed mark of conventional type.
  • this solution still requires two detection systems, one for printed indicia, the other for crease lines.
  • DE-A-10246449 and EP-A-1 406 061 disclose a method of detecting the longitudinal and transverse position of a web packaging material by reading two mutually intersecting embossed lines by means of laser differential reflection technology similar to that disclosed in above-mentioned EP-A-0 772 760 .
  • This method cannot provide all the data that are necessary to control the web feed because no information can be obtained on the web speed, that is an essential parameter to be detected and must be determined in some other way.
  • WO 2004/018190 discloses a sheet packaging material as defined in the preamble of claim 1.
  • An object of the present invention is to devise a sheet packaging material provided with a register mark which overcomes the drawbacks of the prior art, i.e. that is in register with the crease pattern, can be selectively read with respect to the crease pattern, and does not require "external" auxiliary indicia to fully establish the longitudinal and transverse position of the sheet material, as well as its speed.
  • a further object of the present invention is to devise a sheet packaging material provided with a register mark that can be manufactured without substantial increase of the production costs compared with known materials presently in use.
  • Numeral 1 in figure 1 indicates a portion of a sheet packaging material 2 fed in the form of a continuous web 3.
  • Web 3 of material 2 comprises a crease line pattern 4 and a printed design 5, which are repeated at intervals R equal to the length of material required to produce one package.
  • Crease line pattern 4 includes, in a known manner, a plurality of longitudinal crease lines 4a, corresponding to the vertical corners of the finished packages, and a plurality of transverse crease lines 4b corresponding to the horizontal corners of the package and the base of the transversal seal portions or "fins".
  • Inclined crease lines 4c mainly inclined by 45° but also present at different angles with respect to the longitudinal direction, appear in the top and bottom part of the pattern and define the folding lines for the package flaps.
  • Web 3 can be used on a machine 6, shown schematically in figure 2 , for producing aseptic packages, and on which web 3 is unwound off a reel 7 and fed through an aseptic chamber (not shown), where it is sterilized, and through an assembly 8 by which it is folded and sealead longitudinally to form, in known manner, a continuous vertical tube 9.
  • Tube 9 of packaging material is filled continuously with the pourable food product by means of a known filling device 10, and is then fed to a forming and transverse sealing station 14 where it is gripped between pairs of jaws (not shown) that seal the tube transversely to form pillow packs 15.
  • Pillow packs 15 are then separated by cutting the sealing portion between the packs, and are fed to a final folding station 16 where they are folded mechanically to form the fmished packages 17.
  • the packages are formed by folding the material along crease lines 4a, 4b, 4c, and by controlling material feed by means of an optical detecting device 18 for "reading" register marks 19 located on the material at intervals R.
  • each register mark 19 includes at least four inclined lines 21, 22, 23, 24 defined by topographic surface modifications of the web material obtained during the creasing process and detectable by means of detecting device 18, that is conveniently based on differential laser reflection technology according to the principle of EP-A-0 772 760 , as better described hereinafter.
  • Two of the lines (21, 23) are parallel to one another and inclined with respect to the transverse direction by an angle ⁇ in a first direction
  • the other two lines (22, 24) are parallel to one another and inclined with respect to the longitudinal direction by the same angle ⁇ in the opposite direction.
  • Angle ⁇ conveniently ranges between 15° and 35°. These angle values are sufficiently far from the inclination of standard crease lines 4a, 4b, 4c to provide for good recognition of lines 21, 22, 23, 24 by detecting device 18.
  • the four lines 21, 22, 23, 24 are defined by compression crease lines, i.e. lines obtained by using a creasing cylinder with radially protruding ribs and a purely cylindrical counter-cylinder, i.e. without any corresponding indentation.
  • compression crease lines i.e. lines obtained by using a creasing cylinder with radially protruding ribs and a purely cylindrical counter-cylinder, i.e. without any corresponding indentation.
  • the result of this is a local compression on one side only of the web material 3 (see enlarged, cross-section detail of figure 4 ) having a substantially trapezoidal shape.
  • lines 21, 23 and 22, 24 intersect at their midpoints, so as to define two "crosses" 27, 28 that are offset from one another in the longitudinal direction.
  • the lines may be locally interrupted, leaving a substantially non-compressed zone 29 as shown in figures 14 or 15 .
  • Figure 5 is a schematic view showing a possible embodiment of detecting device 18.
  • a central laser beam emitter 30 includes a single laser source and a diffracting lens unit, both not shown in detail as known per se, to generate two planar laser beams 31, 32 that are directed perpendicularly to the web material 3 and intersect along an axis B.
  • the two laser beams 31, 32 can be thought of a single laser beam 35 that is X-shaped in cross section; of course, the two branches of the "X" have the same inclination as 21, 23 and 22, 24 respectively.
  • Detecting device 18 further includes two pairs of laser detectors 33, 34, 35, 36 arranged around emitter 30.
  • Laser detectors 33, 35 are located on opposite sides on the emitter 30, on a plane containing axis B and arranged at an angle to the plane of laser beam 31, i.e. to lines 21, 23, so as to detect differential reflection produced when beam 31 passes on lines 21, 23.
  • Laser detectors 34, 36 are located on opposite sides on the emitter 30, on a plane containing axis B and arranged at an angle to the plane of laser beam 32, i.e. to lines 22, 24, so as to detect differential reflection produced when the beam 32 passes on lines 22, 24.
  • Detecting device 18 is connected to a control unit 40 which controls web feed in response to signals received from laser detectors 33, 34, 35, 36.
  • FIGS 6 to 8 show the working principle of web material longitudinal and transverse position detection in accordance with the present invention.
  • the transversal position of the web material 3 is centred, i.e. the centres of crosses 27, 28 of the register mark 19 are aligned with axis B.
  • T1, T2, T3 and T4 the times when lines 21, 22, 23 and 24 are detected, T1 equals T2 and T3 equals T4. Lateral offset is then zero.
  • T1 will precede T2 and T3 will precede T4; in the case of Figure 8 , T2 will precede T1 and T4 will precede T3.
  • control unit 40 The foregoing explains how transversal deviations can be calculated by control unit 40 and corresponding control signals can be generated.
  • control unit 40 generates a register pulse signal T ( figure 2 ) to control longitudinal web feed (design correction).
  • the register mark 19 of the present invention allows to make such a signal independent from lateral displacement and web speed, as well as to avoid any jitter (deviations in signal timing).
  • a register pulse T is generated at a time corresponding to the "reading" of the second cross 28 when no lateral displacement exists. This is done by reading the first three pulses coming form laser detectors at times T1, T2, T3 (or T2, T1, T4 as the case may be), calculating ⁇ T 1,2 and applying a delay of 1 ⁇ 2 ⁇ T 1,2 to the reading of T3 or T4, whichever comes first. This delayed pulse is pulse T. Therefore, pulse T will be jitter-free and can be easily compared to a clock pulse, in a known manner, to determine whether the web material is "fast” or “slow” and thereby control the design correction mechanism.
  • Figures 10, 11 and 12 disclose different embodiments of the register mark 19, that are however all based on the use of topography modifications on web material surface forming two pairs of parallel lines.
  • FIG. 10 The example of figure 10 is similar to that already described, with the only difference that lines 21, 24 have one common end to form a V and that, similarly, lines 22, 23 have an opposite common end so as to form an inverted V.
  • Lines 21,22 and 23,24 intersect at respective intersection points P1 and P2.
  • lines 21, 22, 24 and 23 are always detected in this order, which simplifies the individual line recognition in case when substantial light scattering by the web material occurs, whereby lines 21, 23 are detected also by detectors 34, 36 and, viceversa, lines 22, 24 are detected also by detectors 33, 35. If this is the case, only two detectors can be used, as opposed to four.
  • figure 12 is very similar to that of figure 3 in terms of line geometry; again, lines 21, 22, 23 and 24 form two crosses shifted from one another in the web feed direction.
  • lines 21 to 24 are not defined by compression crease lines, but rather by transition lines between different-level surfaces 43, 44.
  • such lines are defined by the sides of a plurality of embossed portions 43 that alternate with unmodified surface portions 44 of the web material.
  • Such lines are, in cross-section, "steps" between embossed portions 43 and unmodified portions 44 ( figure 13 ).
  • embossed portions 43 are defined by three isosceles triangles 50, 51, 52 and two rectangular triangles 54, 55 that are equal to one half of an isosceles triangle.
  • Two of the isosceles triangles 50, 51 have their bases aligned in the web feed direction and a common base corner, the third isosceles triangle 52 has its base corners coincident with the vertex corners of the first two triangles.
  • the rectangular triangles 54, 55 are located upstream and downstream of the third isosceles triangle in the web longitudinal direction, each with its short cathetus aligned in the web longitudinal direction and its hypotenuse aligned with one side of a respective isosceles triangle 51, 50.
  • the asymmetrical reflection pattern that originates when the laser beam scans a "step” allows to detect which specific line 21, 22, 23, 24 is being detected, because lines 21, 23 that have a first, e.g. "high to low", step profile will originate a first reflection pattern and lines 22, 24 that have a second, e.g. "low to high” step profile, will originate a second reflection pattern.
  • first e.g. "high to low”
  • second e.g. "low to high” step profile
  • Register marks 19 are in perfect register with the crease pattern, can be selectively read with respect to the crease pattern, and do not require "external" reference or auxiliary indicia, such as printed optical codes, to fully establish the longitudinal and transverse position of the web material and its speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Wrappers (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Making Paper Articles (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Claims (8)

  1. Verpackungsfolie bzw. -material, beinhaltend ein Faltlinienmuster (4), umfassend erste Faltlinien (4a) in einer Längsrichtung, zweite Faltlinien (4b) in einer Querrichtung, dritte Faltlinien (4c), welche hauptsächlich unter 45° relativ zu der Längsrichtung geneigt sind, und wenigstens eine Registriermarke (19), welche durch eine topographische Oberflächenmodifikation definiert ist, welche in demselben Produktionsschritt wie das Faltlinienmuster (4) erhältlich ist, um mit dem Faltlinienmuster (4) ausgerichtet zu sein, wobei die Registriermarke (19) eine Mehrzahl von Linien (21, 22, 23, 24) beinhaltet, dadurch gekennzeichnet, daß die Registriermarke wenigstens zwei Paare von Linien (21, 22; 23, 24) beinhaltet, welche relativ zu der Querrichtung unter einem Winkel geneigt sind, welcher von 15° bis 35° reicht und ausreichend entfernt von der Neigung der ersten, zweiten und dritten Faltlinien (4a, 4b, 4c) ist, um eine gute Erkennung durch eine Detektionsvorrichtung (18) zur Verfügung zu stellen, wobei die Linien eines Paars (21, 23) parallel zueinander und relativ zu der Querrichtung um den Winkel α in einer ersten Richtung geneigt sind, wobei die Linien des anderen Paars (22, 24) parallel zueinander und relativ zu der Querrichtung um denselben Winkel α in der entgegengesetzten Richtung geneigt sind.
  2. Material nach Anspruch 1, dadurch gekennzeichnet, daß die Linien (21, 22, 23, 24) zwei Kreuze (27, 28) bilden, welche voneinander in der Längsrichtung versetzt sind.
  3. Material nach Anspruch 1, dadurch gekennzeichnet, daß die Linien (21, 22, 23, 24) zwei entgegengesetzte V bilden.
  4. Material nach Anspruch 3, dadurch gekennzeichnet, daß die V aneinander schneiden bzw. kreuzen.
  5. Material nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Linien (21, 22, 23, 24) Linien sind, welche durch eine Komprimierung bzw. Verdichtung erhalten sind bzw. werden.
  6. Material nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Linien durch Stufen zwischen geprägten (43) und nicht deformierten Bereichen (44) des Materials definiert sind.
  7. Material nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß es in der Form einer kontinuierlichen Bahn (3) vorliegt, welche das Faltlinienmuster (4) und die Registriermarke (19) darauf bei einer festgelegten Wiederholungslänge (R) entlang der Längsrichtung wiederholt aufweist.
  8. Material nach Anspruch 5, dadurch gekennzeichnet, daß die Linien (21, 22, 23, 24), welche durch eine Komprimierung erhalten sind, durch eine nicht-komprimierte Zone (29) an einem Schnitt- bzw. Kreuzungspunkt unterbrochen sind.
EP05110776A 2005-11-15 2005-11-15 Verpackungsfolie mit Registriermarke Not-in-force EP1785358B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE602005021227T DE602005021227D1 (de) 2005-11-15 2005-11-15 Verpackungsfolie mit Registriermarke
AT05110776T ATE467569T1 (de) 2005-11-15 2005-11-15 Verpackungsfolie mit registriermarke
ES05110776T ES2345936T3 (es) 2005-11-15 2005-11-15 Material de envasado laminar con marca de registro.
EP05110776A EP1785358B1 (de) 2005-11-15 2005-11-15 Verpackungsfolie mit Registriermarke
PCT/EP2006/068414 WO2007057379A1 (en) 2005-11-15 2006-11-14 Sheet packaging material with register mark

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05110776A EP1785358B1 (de) 2005-11-15 2005-11-15 Verpackungsfolie mit Registriermarke

Publications (2)

Publication Number Publication Date
EP1785358A1 EP1785358A1 (de) 2007-05-16
EP1785358B1 true EP1785358B1 (de) 2010-05-12

Family

ID=36336147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05110776A Not-in-force EP1785358B1 (de) 2005-11-15 2005-11-15 Verpackungsfolie mit Registriermarke

Country Status (5)

Country Link
EP (1) EP1785358B1 (de)
AT (1) ATE467569T1 (de)
DE (1) DE602005021227D1 (de)
ES (1) ES2345936T3 (de)
WO (1) WO2007057379A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140100098A1 (en) * 2011-05-31 2014-04-10 Tetra Laval Holdings & Finance S.A. Packaging material having a detectable mark for manufacturing of carton or paperboard based packaging containers
EP3141488B1 (de) * 2015-09-09 2020-04-22 Tetra Laval Holdings & Finance S.A. Verpackungsmaschine zur herstellung von verpackungen aus einem bogen verpackungsmaterial
ES2938918T3 (es) * 2018-07-16 2023-04-17 Tetra Laval Holdings & Finance Un método de producción de un material de envasado

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE502547C2 (sv) 1994-03-21 1995-11-13 Tetra Laval Holdings & Finance Sätt och anordning för att avkänna läget för en tvärgående big hos en förpackningsbana
ITTO20011043A1 (it) 2001-11-02 2003-05-02 Tetra Laval Holdings E Finance Materiale di confezionamento in foglio per il confezionamento di prodotti alimentari versabili.
ITTO20011045A1 (it) 2001-11-02 2003-05-02 Tetra Laval Holdings E Finance Materiale in foglio per la produzione di confezioni di prodotti alimentari, e confezioni realizzate con tale materiale.
DE10237544A1 (de) * 2002-08-16 2004-03-04 Tetra Laval Holdings & Finance S.A. Verpackung, Zuschnitt für dieselbe und Verfahren zu deren Herstellung
DE10246449A1 (de) 2002-10-04 2004-06-09 Kleinhuber, Harald G. Sensorsystem zum Erkennen der Lage von ringförmigen Einprägungen an Materialbahnen

Also Published As

Publication number Publication date
EP1785358A1 (de) 2007-05-16
ES2345936T3 (es) 2010-10-06
DE602005021227D1 (de) 2010-06-24
ATE467569T1 (de) 2010-05-15
WO2007057379A1 (en) 2007-05-24
WO2007057379A8 (en) 2007-10-18

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