WO2004030911A1 - Register mark - Google Patents

Register mark Download PDF

Info

Publication number
WO2004030911A1
WO2004030911A1 PCT/SE2003/001487 SE0301487W WO2004030911A1 WO 2004030911 A1 WO2004030911 A1 WO 2004030911A1 SE 0301487 W SE0301487 W SE 0301487W WO 2004030911 A1 WO2004030911 A1 WO 2004030911A1
Authority
WO
WIPO (PCT)
Prior art keywords
register mark
line set
web
lines
register
Prior art date
Application number
PCT/SE2003/001487
Other languages
French (fr)
Inventor
Rickard Norenstam
Magnus Idberg
Leif Ek
Mats BRISEGÅRD
Original Assignee
Tetra Laval Holdings & Finance S.A.
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 & Finance S.A. filed Critical Tetra Laval Holdings & Finance S.A.
Priority to AU2003263718A priority Critical patent/AU2003263718A1/en
Publication of WO2004030911A1 publication Critical patent/WO2004030911A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/046—Sensing longitudinal register of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H39/00—Associating, collating, or gathering articles or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/12—Surface aspects
    • B65H2701/124—Patterns, marks, printed information
    • B65H2701/1241—Patterns, marks, printed information register marks
    • B65H2701/12411—Patterns, marks, printed information register marks line

Definitions

  • the present invention relates generally to a register mark for webs, and more specifically to a register mark for webs containing material for packaging machines .
  • the invention also includes a method for providing the register mark to the web.
  • PRIOR ART EP 0131 241 Bl. describes a device and a method for using printed optical register marks for longitudinal positioning of a material web in a packaging machine.
  • the register marks are a combination of two printed line sets perpendicular to an intended direction for the web, which line sets are read by an optical reading device.
  • EP 0131 241 Bl is mainly related to positioning of material webs in packaging machines, for manufacturing packages. Those packages are manufactured in a way well known by a person skilled in the a t.
  • the packaging material is formed into a tube by heatsealing two longitudinal edges of the packaging material towards one another. After the forming of the tube, the product to be packaged (often pourable food products like wine, juices or dairy products) are poured into the tube, after which the tube is heat-sealed.
  • the result from the above stages is a row of "pillows" of packaging material filled with food product.
  • the pillow row is cut to pieces, each piece comprising a single pillow.
  • the folding of the pillow into a finished package takes place after the cutting of the pillow row. If the pillow position is wrong with respect to fold lines arranged to facilitate the folding of the pillow portion into a finished package, the folding of the pillow will be less perfect, compared to what would be the case if the pillow -position was correct with respect to the fold lines.
  • the register marks primary purpose is to give information to the packaging machine about the packages longitudinal position relative to the web. This information is used to synchronise different operations, like hole punching splice and tube sealing. Having fold lines pressed into the material on appropriate positions facilitates the folding of the pillows to finished products (packages) .
  • Lateral mispositioning also leads to less accuracy of the location of the fold lines vs. the actual folding, mainly longitudinal folding.
  • the fold lines are pressed in the packaging material by some kind of pressing device.
  • the main purpose of the fold lines is to facilitate folding of the packaging material by weakening the material. This can be done in a lot of ways, e.g. cutting or creasing of the packaging material.
  • the preferred method is however to crease the packaging material between crease rolls provided with intrusions and protrusions in accordance with the desired fold line pattern. As can be understood, it is very easy to provide further intrusions/protrusions to the crease rolls to provide a relief mark to the packaging material during the fold lining process.
  • the present invention solves the above and other problems by providing a register mark comprising a first line set and a second line set, each line set comprising two parallel lines, the first line set being perpendicular to a web direction and the second line set being oblique to the web direction.
  • the register mark is preferably of relief type.
  • the register marks can readily be provided to the packaging material in the same production stage as the fold lines are provided to the packaging material, which minimises the risk for mispositioning of register mark/fold lines .
  • Figure 1 is a schematic view showing a preferred embodiment of the register mark according to the present invention.
  • Figure 2 is a schematic view showing an alternative embodiment of the register mark according to the present invention.
  • Figure 3 is a schematic view showing a preferred embodiment for a coincidence method used to read the register marks.
  • a register mark 200 consists of two line sets, one perpendicular line set (lines 201 and 2D4) and one oblique line set (lines 202 and 203). Both line sets consists of at least two parallel lines 201, 204 and 202, 203, respectively. The angle between the two line sets is denoted with ⁇ .
  • FIG 2 an alternative embodiment for the lines 201-204 constituting the register mark is shown.
  • this embodiment it is possible to have equal distances between the lines constituting each line set, which can be advantageous in some cases .
  • the angle between the two line sets is here also denoted with ⁇ .
  • the register mark 200 on the material web is approaching the detector areas D1-D4 on a detector (not shown) . Only a first detector area Dl reads a signal from the line 204, meaning that the signal is treated as a misreading.
  • a detector area D2 gets signal from the line 203. Since D3 does not simultaneously gets a signal, the signal from D2 is regarded as a misread.
  • both detector areas Dl and D4 gets signal from the perpendicular line set 201,204, which leads the detector system to regard the reading as being a reading of a correct longitudinal position of the web.
  • both detector areas D2 and D3 detect signal from the oblique lines 202, 203, leading the system to regard the reading as a correct reading for the lateral position of the web.
  • T4 and T5 only single detector area readings occur, leading the system to regard the readings as misreads .
  • the reading of the two perpendicular lines 201, 204 by detector areas Dl and D4 and the reading of the two oblique lines 202, 203 by detector areas D2 and D3 will coincide in time, or have a predetermined time separation.
  • the angle ⁇ is important for the function of the register mark.
  • a high value of the angle ⁇ gives a high accuracy for the lateral positioning, but requires a larger register mark.
  • a lower value of the angle ⁇ gives a lower accuracy, but admits the use of a mark with smaller dimensions.
  • the overall dimensions of the mark are finally determined by space restrictions, fold line distances and the demand for lateral accuracy.
  • the largest lateral mispositioning of the mark also determines the final size of the register mark. If the web for some reason would get so much laterally mispositioned that the register mark is not readable for the reading device, the system is prohibited from making correct lateral adjustments of the web. This could be of course be avoided by providing a larger register mark, but other restrictions for the size, such as package size, should also be considered when the size of the register mark is decided.
  • register mark could be of relief type.
  • Relief register marking of a packaging material that include fold lines is fairly simple, since the fold lining process readily could be adapted to include the provision of a relief register mark.
  • the inclusion of the relief register marking in the fold lining process can be accomplished e.g. by providing extra embossments or grooves in the fold lining rolls, in a way that is easily comprehended by a person skilled in the art .

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Collation Of Sheets And Webs (AREA)

Abstract

A web provided with a register mark (200), the register mark (200) comprising a first line set (201, 204) and a second line set (202,203), each line set comprising two parallel lines, the first line set (201,204) being perpendicular to a web direction and the second line set (202,203) being oblique to the web direction. Also, a method is presented for producing a register mark (200), in which the register mark (200) is relief printed in the same production stage as a crease lining of a web material.

Description

TITLE OF THE INVENTION REGISTER MARK
TECHNICAL FIELD
The present invention relates generally to a register mark for webs, and more specifically to a register mark for webs containing material for packaging machines . The invention also includes a method for providing the register mark to the web.
PRIOR ART EP 0131 241 Bl. describes a device and a method for using printed optical register marks for longitudinal positioning of a material web in a packaging machine. The register marks are a combination of two printed line sets perpendicular to an intended direction for the web, which line sets are read by an optical reading device.
EP 0131 241 Bl is mainly related to positioning of material webs in packaging machines, for manufacturing packages. Those packages are manufactured in a way well known by a person skilled in the a t. In short, the packaging material is formed into a tube by heatsealing two longitudinal edges of the packaging material towards one another. After the forming of the tube, the product to be packaged (often pourable food products like wine, juices or dairy products) are poured into the tube, after which the tube is heat-sealed.
The result from the above stages is a row of "pillows" of packaging material filled with food product. After the heat sealing, the pillow row is cut to pieces, each piece comprising a single pillow. The folding of the pillow into a finished package takes place after the cutting of the pillow row. If the pillow position is wrong with respect to fold lines arranged to facilitate the folding of the pillow portion into a finished package, the folding of the pillow will be less perfect, compared to what would be the case if the pillow -position was correct with respect to the fold lines. The register marks primary purpose is to give information to the packaging machine about the packages longitudinal position relative to the web. This information is used to synchronise different operations, like hole punching splice and tube sealing. Having fold lines pressed into the material on appropriate positions facilitates the folding of the pillows to finished products (packages) .
One major problem with the prior art solution is that the printing of the optical register marks and the provision of relief fold lines are performed in separate manufacturing stages. This leads to register tolerance in positioning of the fold lines vs. the printed, optical marks, which in turn leads to an less perfect product, since the positioning of the "pillows" is controlled by the location of the printed register mark, and not by the location of the fold lines.
Further, the design of the optical register mark, with lines perpendicular to the web direction only, make it impossible to determine the lateral position of the web.
Lateral mispositioning also leads to less accuracy of the location of the fold lines vs. the actual folding, mainly longitudinal folding.
As is well understood by persons skilled in the art, the fold lines are pressed in the packaging material by some kind of pressing device. The main purpose of the fold lines is to facilitate folding of the packaging material by weakening the material. This can be done in a lot of ways, e.g. cutting or creasing of the packaging material. The preferred method is however to crease the packaging material between crease rolls provided with intrusions and protrusions in accordance with the desired fold line pattern. As can be understood, it is very easy to provide further intrusions/protrusions to the crease rolls to provide a relief mark to the packaging material during the fold lining process.
SUMMARY OF THE INVENTION
The present invention solves the above and other problems by providing a register mark comprising a first line set and a second line set, each line set comprising two parallel lines, the first line set being perpendicular to a web direction and the second line set being oblique to the web direction.
Further, the register mark is preferably of relief type. Hence, the register marks can readily be provided to the packaging material in the same production stage as the fold lines are provided to the packaging material, which minimises the risk for mispositioning of register mark/fold lines .
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 is a schematic view showing a preferred embodiment of the register mark according to the present invention.
Figure 2 is a schematic view showing an alternative embodiment of the register mark according to the present invention.
Figure 3 is a schematic view showing a preferred embodiment for a coincidence method used to read the register marks.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT With reference to figure 1, a register mark 200 according to the invention consists of two line sets, one perpendicular line set (lines 201 and 2D4) and one oblique line set (lines 202 and 203). Both line sets consists of at least two parallel lines 201, 204 and 202, 203, respectively. The angle between the two line sets is denoted with α.
In figure 2 an alternative embodiment for the lines 201-204 constituting the register mark is shown. In this embodiment, it is possible to have equal distances between the lines constituting each line set, which can be advantageous in some cases . The angle between the two line sets is here also denoted with α.
The reading of the different line sets, and a device to perform the reading of the lines are described in a co- pending patent application, but for clarification the reading method will be described hereinafter.
With reference to fig. 3, at TO, the register mark 200 on the material web is approaching the detector areas D1-D4 on a detector (not shown) . Only a first detector area Dl reads a signal from the line 204, meaning that the signal is treated as a misreading.
At Tl, a detector area D2 gets signal from the line 203. Since D3 does not simultaneously gets a signal, the signal from D2 is regarded as a misread.
At T2, both detector areas Dl and D4 gets signal from the perpendicular line set 201,204, which leads the detector system to regard the reading as being a reading of a correct longitudinal position of the web. At T3 , both detector areas D2 and D3 detect signal from the oblique lines 202, 203, leading the system to regard the reading as a correct reading for the lateral position of the web. At T4 and T5 , only single detector area readings occur, leading the system to regard the readings as misreads .
If the web is perfectly laterally aligned, the reading of the two perpendicular lines 201, 204 by detector areas Dl and D4 and the reading of the two oblique lines 202, 203 by detector areas D2 and D3 will coincide in time, or have a predetermined time separation.
The reason behind the coincidence demand for the readings of each line set is that single perpendicular and oblique lines might be contained in the design printing or the fold lining of the package material. If there was no coincidence demand for the line set readings, such lines could be regarded as lines included in the register mark. The dimensions of the register mark must however be chosen with great care: the distance between the line sets must be chosen so that no other types of lines (like fold lines or design lines) are separated the same distance as the line sets of the register mark, since such lines otherwise could be misread as lines constituting the register mark.
As can be understood from the above, the angle α is important for the function of the register mark. A high value of the angle α gives a high accuracy for the lateral positioning, but requires a larger register mark. A lower value of the angle α gives a lower accuracy, but admits the use of a mark with smaller dimensions. The overall dimensions of the mark are finally determined by space restrictions, fold line distances and the demand for lateral accuracy. Further, the largest lateral mispositioning of the mark also determines the final size of the register mark. If the web for some reason would get so much laterally mispositioned that the register mark is not readable for the reading device, the system is prohibited from making correct lateral adjustments of the web. This could be of course be avoided by providing a larger register mark, but other restrictions for the size, such as package size, should also be considered when the size of the register mark is decided.
One important feature with the register mark according to the present invention is that it could be of relief type. Relief register marking of a packaging material that include fold lines is fairly simple, since the fold lining process readily could be adapted to include the provision of a relief register mark. The inclusion of the relief register marking in the fold lining process can be accomplished e.g. by providing extra embossments or grooves in the fold lining rolls, in a way that is easily comprehended by a person skilled in the art .
By including the provision of the register mark in the same production stage as the fold lining, the risk of misalignment or mispositioning of fold lines vs. register marks is minimised.
It is worth to notice, that the method described above is not limited to reading of relief register marks; in some cases, it might be useful to use the method to read printed, optical marks.
One very important feature with the present invention is that it readily could co-exist with prior art devices for reading optical marks of the obsolete type.

Claims

1 Web provided with register mark (200) , characterised in that the register mark (200) comprises a first line set 201,204 and a second line set (202,203), each line set comprising at least two parallel lines, the first line set (201,204) being perpendicular to an intended direction of travel for the web, and the second line set (202,203) being oblique to the web direction.
2 Web provided with register mark (200) according to claim 1, characterised in that the second line set
(202,203) is arranged with an angle (α) of 0-10 degrees from the lines 201,204 included in the first line set.
3 Web provided with register mark (200) according to claim 1, characterised in that the second line set (202,203) is arranged with an angle (α) of 10-20 degrees from the lines (201,204) included in the first line set.
4 Web provided with register mark (200) according to claim 1, characterised in that the second line set (202,203) is arranged with an angle (α) of 20-30 degrees from the lines (201,204) included in the first line set.
5 Web provided with register mark (200) according to claim 1, characterised in that the second line set (202,203) is arranged with an angle (α) of 30-40 degrees from the lines (201,204) included in the first line set. 6 Web provided with register mark (200) according to claim 1, characterised in that the second line set (202,203) is arranged with an angle (α) of 40-50 degrees from the lines (201,204) included in the first line set.
7 Web provided with register mark (200) according to claim 1, characterised in that the second line set
(202,203) is arranged with an angle (α) of 50-60 degrees from the lines (201,204) included in the first line set.
8 Web provided with register mark (200) according to claim 1, characterised in that the second line set (202,203) is arranged with an angle (α) of 60-70 degrees from the lines (201,204) included in the first line set. 9 Web provided with register mark (200) according to claim 1, characterised in that the second line set (202,203) is arranged with an angle ( ) of 70-80 degrees from the lines (201,204) included in the first line set. 10 Web provided with register mark (200) according to claim 1, characterised in that the second line set
(202.203) is arranged with an angle (α) of 80-90 degrees from the lines (201,204) included in the first line set.
11 Web provided with register mark (200) according to any of the preceding claims, characterised in that the second line set (202,203) is arranged between the lines
(201.204) included in the first line set.
12 Web provided with register mark (200) according to any of the preceding claims, characterised in that the register mark (200) is in relief form.
13 Web provided with register mark (200) according to any of the preceding claims, characterised in that the register mark (200) is used for positioning of a packaging material web. 14 Web provided with register mark (200) according to any of the preceding claims, characterised in that the register mark (200) is used for positioning of packaging material webs in packaging machines .
15 Web provided with register mark (200) according to any of the preceding claims, characterised in that the relief mark is co-existing with printed prior art register marks .
16 Method for producing a web material provided with a register mark (200) , characterised in that the register mark (200) is provided to the web material in the same production stage as a fold lining of the web material.
17 Method according to claim 16, characterised in that the provision of the register mark to the web material is made by extra embossments or grooves in fold lining rolls for the fold lining of the web material, leading to a relief register mark.
18 Method according to any of the claims 16 or 17, characterised in that the web material comprise packaging material for production of packages.
PCT/SE2003/001487 2002-10-03 2003-09-24 Register mark WO2004030911A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003263718A AU2003263718A1 (en) 2002-10-03 2003-09-24 Register mark

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0202930A SE527359C2 (en) 2002-10-03 2002-10-03 Record Brand
SE0202930-4 2002-10-03

Publications (1)

Publication Number Publication Date
WO2004030911A1 true WO2004030911A1 (en) 2004-04-15

Family

ID=20289168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2003/001487 WO2004030911A1 (en) 2002-10-03 2003-09-24 Register mark

Country Status (3)

Country Link
AU (1) AU2003263718A1 (en)
SE (1) SE527359C2 (en)
WO (1) WO2004030911A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012091654A1 (en) * 2010-12-29 2012-07-05 Tetra Laval Holdings & Finance S.A. A method of producing a packaging material provided with a recurring pattern of print ink
CN103660622A (en) * 2012-09-05 2014-03-26 卡西欧计算机株式会社 Printing device
JP2014054733A (en) * 2012-09-11 2014-03-27 Casio Comput Co Ltd Printing device and member to be printed
US8834334B2 (en) 2008-12-18 2014-09-16 Tetra Laval Holdings & Finance S.A. Method of controlling the relative position between printed patterns and non-printed patterns on a web-shaped material and a system used in the method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2802666A (en) * 1953-11-05 1957-08-13 Crosfield J F Ltd Register control systems for moving webs
DE1049480B (en) * 1959-01-29 Siemens Schuckertwerke Aktiengesellschaft, Berlin und Erlangen Register control for multicolor rotary printing machines
US3701464A (en) * 1970-10-15 1972-10-31 Harris Intertype Corp Circumferential and lateral web registration control system
US4135664A (en) * 1977-03-04 1979-01-23 Hurletronaltair, Inc. Lateral register control system and method
EP0131241A2 (en) * 1983-07-06 1985-01-16 AB Tetra Pak Method and device for reading marks applied to a moving material web provided with a printed decoration using photoelectric means
US4690051A (en) * 1986-02-12 1987-09-01 Miyakoshi Printing Machinery Co., Ltd. Method of image registration in a web fed, multiple printing rotary press
WO1995025941A1 (en) * 1994-03-21 1995-09-28 Tetra Laval Holdings & Finance S.A. A method and device for detecting the position for a crease line of a packaging web

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049480B (en) * 1959-01-29 Siemens Schuckertwerke Aktiengesellschaft, Berlin und Erlangen Register control for multicolor rotary printing machines
US2802666A (en) * 1953-11-05 1957-08-13 Crosfield J F Ltd Register control systems for moving webs
US3701464A (en) * 1970-10-15 1972-10-31 Harris Intertype Corp Circumferential and lateral web registration control system
US4135664A (en) * 1977-03-04 1979-01-23 Hurletronaltair, Inc. Lateral register control system and method
EP0131241A2 (en) * 1983-07-06 1985-01-16 AB Tetra Pak Method and device for reading marks applied to a moving material web provided with a printed decoration using photoelectric means
US4690051A (en) * 1986-02-12 1987-09-01 Miyakoshi Printing Machinery Co., Ltd. Method of image registration in a web fed, multiple printing rotary press
WO1995025941A1 (en) * 1994-03-21 1995-09-28 Tetra Laval Holdings & Finance S.A. A method and device for detecting the position for a crease line of a packaging web

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8834334B2 (en) 2008-12-18 2014-09-16 Tetra Laval Holdings & Finance S.A. Method of controlling the relative position between printed patterns and non-printed patterns on a web-shaped material and a system used in the method
WO2012091654A1 (en) * 2010-12-29 2012-07-05 Tetra Laval Holdings & Finance S.A. A method of producing a packaging material provided with a recurring pattern of print ink
CN103660622A (en) * 2012-09-05 2014-03-26 卡西欧计算机株式会社 Printing device
US9156288B2 (en) 2012-09-05 2015-10-13 Casio Computer Co., Ltd. Printing device for controlling print head based on oblique lines on print medium
CN103660622B (en) * 2012-09-05 2016-09-07 卡西欧计算机株式会社 Printing equipment
JP2014054733A (en) * 2012-09-11 2014-03-27 Casio Comput Co Ltd Printing device and member to be printed

Also Published As

Publication number Publication date
SE527359C2 (en) 2006-02-21
AU2003263718A1 (en) 2004-04-23
SE0202930L (en) 2004-04-04
SE0202930D0 (en) 2002-10-03

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