EP0839950B1 - Verfahren zum Einlagern von Substanzen in eine laufende Faserstoffbahn - Google Patents
Verfahren zum Einlagern von Substanzen in eine laufende Faserstoffbahn Download PDFInfo
- Publication number
- EP0839950B1 EP0839950B1 EP97118504A EP97118504A EP0839950B1 EP 0839950 B1 EP0839950 B1 EP 0839950B1 EP 97118504 A EP97118504 A EP 97118504A EP 97118504 A EP97118504 A EP 97118504A EP 0839950 B1 EP0839950 B1 EP 0839950B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substances
- process according
- paper
- web
- headbox
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/42—Ribbons or strips
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/44—Watermarking devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
- D21H21/285—Colorants ; Pigments or opacifying agents insoluble
Definitions
- the invention relates to a method in which substances in or before Headbox of a paper machine introduced into a fiber suspension from which a running fibrous web is formed, the Introduction to several, distributed across the width of the headbox Places.
- the strips are spaced apart seen in the direction of the web width.
- the insertion is also carried out here the strip is continuous so that the strip is not in the finished paper web are interrupted.
- US-A-5,560,807 describes a headbox in which a Fibrous suspension over a laterally flown, itself tapered channel, also known as a cross distributor, a battery of lengthways arranged diffuser tubes and supplied via a nozzle-like tapered material outlet is placed on a sieve.
- a Fibrous suspension over a laterally flown, itself tapered channel also known as a cross distributor
- a battery of lengthways arranged diffuser tubes and supplied via a nozzle-like tapered material outlet is placed on a sieve.
- To aggregates of Adding fiber suspension is a separate pressurizable Circuit provided, the outputs in the countercurrent direction in the Partition open, which separates the cross-distribution duct from the tube bundle.
- the supply of the aggregates can be controlled via valves.
- the additives such as starch or chemical Additives continuously and evenly across the width of the headbox are added, preferably in the direction of the thickness to be formed Fibrous web certain layers, especially the one on the wire first overlying layer of the fibrous web, with the additives become.
- EP-A-0 355 734 describes a method for producing a Fibrous web, in which an aggregate across the width of the fibrous web in different concentration continuously in the direction of movement Fibrous web is added, two for this purpose Fibrous suspensions are made, one of which is the Contains aggregate, which can be a dye.
- the Both pulp suspensions are via a plurality of discharge points across the width of the headbox either individually or in a predetermined Mix ratio applied to a forming fabric.
- the resulting fibrous web has one side to the other changing profile according to the concentration of the aggregate, for example a color, the thickness and weight per unit area are substantially unchanged across the width.
- a fiber suspension in low addition cans to add fluorescent fibers, for example can be excited to shine under UV light and especially for banknotes find widespread use.
- a disadvantage with such a statistical addition A fiber suspension is in particular that only the occurrence of fluorescent fibers must be sufficient as proof of authenticity without a certain local assignment and spatial distribution ultimately security over the origin of the paper there. Even with small additions, there is a risk that sections of paper the size of banknotes are completely devoid of such fibers are trained and are therefore unusable.
- the object of the invention is a method of the type mentioned to indicate that a better and at the same time more difficult to forge labeling allows a fibrous web.
- the crucial measure of the invention is that one in the Fibrous suspension introduced substance in several places over the Width of the fibrous web and is also initiated intermittently.
- An imitation of such a fibrous product requires much higher than known security papers Skills. It's not just about one Embedding security thread in the pulp (which is difficult enough), but also the exact positions of the discharge points, seen across the width of the headbox to comply with and - what is particularly difficult - the temporal sequence of the periods of initiation and the periods of non-initiation.
- Such clocking can be controlled individually and by the authorized user at any time can be easily modified. For example, with banknotes certain images assigned to certain banknote number ranges become.
- Colorants come as flowable media, powdery substances or material flows into consideration, which are in the finished Differentiate the fibrous web from the remaining pulp mass.
- substances can have special luminescent properties to have.
- fiber flows for marking differ significantly from the rest of the fiber suspension, for example by a high or low filler content, by a different fiber composition or concentration.
- Coming also introductory substances into consideration which only appear in the finished paper Appear when the paper is treated in a special way is, for example, when it is heated, moistened or stretched.
- An inlet 1 takes place from below in the middle for the segmented loading of the Forming unit 2.
- a central distributor with vibration damper 5 has one Inlet cone 3 on.
- One can also see 24 flexible lines 6 connected to the Forming unit 2 are connected. In the flexible lines 6 open on Central distributor of dilution water pipes 4, which are connected by a distribution pipe 7 are introduced.
- Figure 2 illustrates the principle of the invention in a schematic Representation in the plane shown in Figure 1d.
- the distribution pipe 7 shown curved.
- the flexible lines 6 are all of the same length.
- FIG. 3 shows further details of the forming unit 6.
Landscapes
- Paper (AREA)
- Credit Cards Or The Like (AREA)
- Nonwoven Fabrics (AREA)
Description
Claims (12)
- Verfahren, bei dem Substanzen (8) in oder vor dem Stoffauflauf einer Papiermaschine in eine Faserstoffsuspension eingeleitet werden, aus der eine laufende Faserstoffbahn gebildet wird, wobei die Einleitung an mehreren, über die Breite des Stoffauflaufs verteilten Stellen erfolgt, dadurch gekennzeichnet, daß die Substanzen (8) an wenigstens einer der Stellen auf intermittierende Weise eingeleitet werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens eine der Substanzen (8) eine Flüssigkeit ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens eine der Substanzen (8) ein Pulver ist.
- Verfahren nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß wenigstens eine der Substanzen (8) ein Feststoff ist.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß wenigstens eine der Substanzen (8) ein Farbstoff ist.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Einleitung der Substanzen (8) bezüglich deren Menge steuerbar ist.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Einleitung der Substanzen (8) bezüglich der Einleitungsdauer steuerbar ist.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Fasersuspension einem zentralen Verteiler (5) zugeführt wird, und von diesem in mehreren Teilströmen (6) einem Sieb des Stoffauflaufs zugeführt wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß den Teilströmen (6) eine Verdünnungsflüssigkeit (7, 4) zugesetzt wird, wobei die Substanzen (8) der Verdünnungsflüssigkeit (7, 4) zugesetzt werden.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Substanzen (8) in der Faserstoffbahn, die aus der Faserstoffsuspension gebildet wird, als Bild, Motiv oder Schrift erscheinen.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß aus der Faserstoffsuspension eine Papierbahn gebildet wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß ein Stück der Papierbahn als Sicherheitspapier, insbesondere Banknote, verwendet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19644867 | 1996-10-29 | ||
DE19644867 | 1996-10-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0839950A2 EP0839950A2 (de) | 1998-05-06 |
EP0839950A3 EP0839950A3 (de) | 1998-12-09 |
EP0839950B1 true EP0839950B1 (de) | 2003-05-28 |
Family
ID=7810270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97118504A Expired - Lifetime EP0839950B1 (de) | 1996-10-29 | 1997-10-24 | Verfahren zum Einlagern von Substanzen in eine laufende Faserstoffbahn |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0839950B1 (de) |
AT (1) | ATE241727T1 (de) |
DE (1) | DE59710160D1 (de) |
ES (1) | ES2199320T3 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HUP0102544A3 (en) * | 1998-06-16 | 2002-12-28 | Whd Elektron Prueftech Gmbh | Marking substances and security markings for testing documents, stocks, banknotes, covers and products |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4940512A (en) * | 1988-08-18 | 1990-07-10 | E. I. Du Pont De Nemours And Co.Ny | Cross-directional distribution of additives in synthetic papers |
US5560807A (en) * | 1995-03-29 | 1996-10-01 | Beloit Technologies, Inc. | Headbox additive injection system |
-
1997
- 1997-10-24 DE DE59710160T patent/DE59710160D1/de not_active Expired - Fee Related
- 1997-10-24 EP EP97118504A patent/EP0839950B1/de not_active Expired - Lifetime
- 1997-10-24 ES ES97118504T patent/ES2199320T3/es not_active Expired - Lifetime
- 1997-10-24 AT AT97118504T patent/ATE241727T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0839950A3 (de) | 1998-12-09 |
ES2199320T3 (es) | 2004-02-16 |
ATE241727T1 (de) | 2003-06-15 |
EP0839950A2 (de) | 1998-05-06 |
DE59710160D1 (de) | 2003-07-03 |
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