EP0458973B1 - Method of making watermarked paper - Google Patents
Method of making watermarked paper Download PDFInfo
- Publication number
- EP0458973B1 EP0458973B1 EP91900050A EP91900050A EP0458973B1 EP 0458973 B1 EP0458973 B1 EP 0458973B1 EP 91900050 A EP91900050 A EP 91900050A EP 91900050 A EP91900050 A EP 91900050A EP 0458973 B1 EP0458973 B1 EP 0458973B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wire
- pattern
- lace
- paper
- making
- 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
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Classifications
-
- 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
- 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
- D21F1/46—Dandy rolls
-
- 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
- D21F1/60—Cylinder moulds
Definitions
- This invention relates to a method of easily and economically producing watermarked paper which isaki and has high gradation by utilizing a lace.
- the meshes of the wire of the pattern portion are closed and the passage of fibrous materials through them is impeded.
- a wet web is not formed at that portion or even if it is formed, its thickness is reduced, so that a watermark pattern comes into view.
- the size of the meshes of the face wire closed by the pattern shape is by far greater than a fiber length in this case, holes are formed in the wet web and renders a practical problem. Therefore, limitations must be imposed on the shape, size and distribution of the pattern shape or multi-layered papermaking must be carried out in order to prevent the formation of the holes.
- the method (c) hammers the pattern as the corrugation of the wire, the meshes of the wire are not closed. Therefore, the watermark pattern is generated due to the difference of drainage rate depending on the height of the corrugation of the wire, its depth, the angle of a slope, and so forth.
- this method (c) is more excellent in so-called "gradation" which represents a delicate difference of density of the watermark pattern, has the smaller possibility of holes at which the fiber does not at all exist, and has a smaller limitation to the design of the watermark pattern.
- the production of the wire for the method (c) needs a higher level of technique and skill than the methods (a) and (b).
- the corrugation pattern itself of the wire is likely to undergo deformation or breakage during the paper making operation.
- the production methods of watermarked paper described above exhibit the watermark pattern by forming low and high densities in the fiber distribution during the paper making process. Unlike these methods, a method which prints an arbitrary pattern by a transparentizing agent (Japanese Patent Publication No. 3802/1975) and a method using a resin which becomes transparent by hot press and then makes the pattern portion transparent by hot press to obtain a watermark-like pattern (Japanese Patent Laid-Open No. 275500/1986) have been proposed.
- Japanese Patent Publication Nos. 7725/1972 and 12846/1974 propose a production method of watermark paper having a deep corrugation pattern by using a fourdrinier wire providing a pattern. This method however involves the problem that since the fourdrinier wire providing a pattern rotates while keeping in contact with a large number of rollers and receiving a high tension, the expensive fourdrinier wire providing a pattern is worn out and its travelling stability is not satisfactory.
- US Patent No. 4526652 discloses a dandy roll for producing paper bearing a watermark which simulates oxford cloth. A pattern is formed on the wire mesh of the roll by soldering on straight electro wires and by removing segments of the wire mesh.
- a felt roller which can be used to form watermarked paper is formed by sewing or stitching a wool thread into a felt strip.
- the invention provides a method of producing watermarked paper comprising preparing a cylinder mould of a cylinder-vat machine or a dandy roll having a face wire fitted thereon for providing watermarks in paper, and making paper by using said cylinder mould or said dandy roll having said face wire fitted thereon, characterized in that said face wire comprises a patterned wire prepared by fixing a lace having a through-hole-like pattern, obtained by knitting a synthetic fiber or a natural fiber or by making an embroidery on a base fabric, to the surface of a wire cloth for paper making.
- the lace used in the present invention thus includes those products which are formed by yarn in a predetermined texture and express a through-hole-like pattern by the density of gaps between the yarns, and includes a fabric lace formed by making an embroidery on a base cloth such as fabric, a knitted fabric and the like (refer to "Modern World Encyclopedia", Vol. 3, page 944 (1972), published by Kodansha).
- synthetic fibers such as nylon or polyester and natural fibers such as cotton, hemp or wool can be used.
- arbitrary means such as soldering, sewing, bonding by an adhesive and the like, can be selected depending on the materials of the lace.
- Appearance of the pattern of watermarked paper in the present invention is based on diversity of the lace texture such as the combination of the thickness of the yarns of the lace constituting the face wire, the density of gaps between the yarns, the variety of the thickness of the pattern portions formed by the degree of overlap of the yarns, and so forth. Accordingly, it is possible to obtain watermarked paper having a complicated and extraordinarily pattern and excellent gradation that the conventional methods have not been able to obtain.
- Fig. 1 shows a dandy roll 1 which is used when the method of the present invention is practiced by a fourdrinier machine.
- This dandy roll 1 is produced by fitting a patterned wire, which is formed by fixing and bonding a lace 2 to a wire cloth 3 for papermaking, to a frame 4 of the dandy roll.
- Fig. 2 shows a cylinder mould 10 used when the method of the present invention is practiced by a cylinder-vat machine.
- This cylinder mould 10 is produced by fitting a patterned wire, which is formed by fitting and bonding a lace 20 to a wire cloth 30 for papermaking, to a frame 40 of the cylinder.
- the dandy roll 1 shown in Fig. 1 is disposed and slidably rotated in the process in which wet web is formed on the wire part of the fourdrinier machine or the like, so as to execute paper making, and the resulting wet web is dried in a customary manner.
- the cylinder mould 10 for the cylinder-vat machine shown in Fig. 2 the cylinder mould 10 is disposed at a predetermined position inside a vat of the cylinder-vat machine and papermaking may be carried out in a customary manner.
- the cylinder-vat machine includes specific cylinder-vat machines such as a roto-former, a ultra-former, a Stevens former, and so forth.
- a lace can be used as it is.
- a lace can be used as it is.
- a patterned wire was produced by fixing and bonding integrally a lace obtained by knitting polyester filaments and having a flower pattern to a 90-mesh wire cloth made of bronze by using an epoxy type adhesive (trade name "Araldite 106", a product of CIBA-GEIGY Co.), and this patterned wire was fitted as a face wire to a cylinder mould.
- watermarked paper having a basis weight of 120 g/m2 was produced using paper stock having the following composition (per beater): NBKP 150 Kg LBKP (degree of beating: 400 cc CSF) 390 Kg rosin size ("SPN700", a trade name, a product of Arakawa Rinsan Kagaku Kabushiki Kaisha) 7.2 Kg dry strength agent ("POLYSTRON ST13", a trade name, a product of Misawa Ceramic Kabushiki Kaisha) 20 Kg starch (“AMYCOL", a trade name, a product of Nigorgen Kagaku Kabushiki Kaisha) 3 Kg fixing agent (Aluminum sulfate) 30 Kg dyes (products of BAYER Co., Ltd.) LEVACELL FAST YELLOW GFN (L) 0.02 %* LEVACELL FAST BLACK G 0.002 %* * Based on the plup
- the lace obtained in this manner was integrally fixed and bonded to a wire cloth made of bronze by an adhesive (the same epoxy resin as described above) to produce a patterned wire and this patterned wire was fitted as a face wire to a dandy roll.
- the dandy roll was placed on a wire part of a fourdrinier machine and was brought into rolling contact with wet web (dry basis weight: 110 g/m2) having the same paper stock composition as in Example 1. Thereafter, paper was dried in a customary manner.
Landscapes
- Paper (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP324765/89 | 1989-12-14 | ||
JP32476589A JPH0686719B2 (ja) | 1989-12-14 | 1989-12-14 | 透き入れ紙の製造方法 |
PCT/JP1990/001602 WO1991009172A1 (en) | 1989-12-14 | 1990-12-10 | Method of making watermarked paper |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0458973A1 EP0458973A1 (en) | 1991-12-04 |
EP0458973A4 EP0458973A4 (en) | 1992-06-03 |
EP0458973B1 true EP0458973B1 (en) | 1995-05-24 |
Family
ID=18169427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91900050A Expired - Lifetime EP0458973B1 (en) | 1989-12-14 | 1990-12-10 | Method of making watermarked paper |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0458973B1 (ja) |
JP (1) | JPH0686719B2 (ja) |
DE (1) | DE69019737T2 (ja) |
WO (1) | WO1991009172A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015006264A1 (en) * | 2013-07-09 | 2015-01-15 | Georgia-Pacific Gypsum Llc | Selectively sized multi-ply core stock paper, methods, and apparatus |
EP2947202A1 (de) | 2014-05-21 | 2015-11-25 | Landqart AG | Sicherheitspapier mit wasserzeichen |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2769927B1 (fr) * | 1997-10-20 | 1999-12-24 | Thibierge Et Comar | Papier comportant un motif en relief, son procede de fabrication et toile pour sa fabrication |
DE102008024401B3 (de) * | 2008-05-20 | 2010-01-07 | Hans Grossmann | Entwässerungssieb für eine Saugwalze einer Papiermaschine |
CN101372816B (zh) * | 2008-09-20 | 2011-04-20 | 李�昊 | 真空圆网笼的壳体 |
CN102373642B (zh) * | 2011-11-10 | 2014-07-23 | 保定钞票纸业有限公司 | 一种二维码水印防伪纸的制造方法 |
CN103128471A (zh) * | 2013-03-19 | 2013-06-05 | 四川大学 | 白水印自动焊接系统 |
CN105672042B (zh) * | 2016-01-21 | 2018-08-07 | 成都印钞有限公司 | 一种具有潜影水印的防伪纸张以及该纸张的制作工艺 |
CN111231493A (zh) * | 2019-12-13 | 2020-06-05 | 成都印钞有限公司 | 纸张成型模具、模具制作方法及由成型模具制造的纸张 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4526652A (en) * | 1983-11-17 | 1985-07-02 | The Mead Corporation | Dandy roll for manufacturing paper having simulated oxford cloth watermark and related method for papermaking |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59473C (de) * | E. HOESCH, Königlicher Kommerzienrath, in Düren und M. KRAUSE in Berlin S.W., Beuthstrafse 7 | Erzeugung farbiger Wasserzeichen auf der Papiermaschine | ||
DE116431C (ja) * | ||||
US1514238A (en) * | 1922-04-07 | 1924-11-04 | F C Huyck & Sons | Means for watermarking paper |
GB373905A (en) * | 1930-10-20 | 1932-06-02 | Nat Bank Of Hungary | Process for the production of genuine watermark papers without using relief moulds |
CH206738A (de) * | 1937-11-12 | 1939-08-31 | Ernst Walter Ludwig | Reliefschablone zur Erzeugung echter Relief-Wasserzeichen. |
CH244613A (de) * | 1945-05-25 | 1946-09-30 | Reinhardt Erwin | Einrichtung an Papiermaschinen zur Herstellung von in der Durchsicht durch das Papier gegenüber demselben dunkler erscheinenden Wasserzeichen. |
JPS5341523Y2 (ja) * | 1973-05-14 | 1978-10-06 |
-
1989
- 1989-12-14 JP JP32476589A patent/JPH0686719B2/ja not_active Expired - Fee Related
-
1990
- 1990-12-10 DE DE69019737T patent/DE69019737T2/de not_active Expired - Lifetime
- 1990-12-10 EP EP91900050A patent/EP0458973B1/en not_active Expired - Lifetime
- 1990-12-10 WO PCT/JP1990/001602 patent/WO1991009172A1/ja active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4526652A (en) * | 1983-11-17 | 1985-07-02 | The Mead Corporation | Dandy roll for manufacturing paper having simulated oxford cloth watermark and related method for papermaking |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015006264A1 (en) * | 2013-07-09 | 2015-01-15 | Georgia-Pacific Gypsum Llc | Selectively sized multi-ply core stock paper, methods, and apparatus |
EP2947202A1 (de) | 2014-05-21 | 2015-11-25 | Landqart AG | Sicherheitspapier mit wasserzeichen |
Also Published As
Publication number | Publication date |
---|---|
DE69019737T2 (de) | 1996-02-08 |
EP0458973A1 (en) | 1991-12-04 |
JPH0686719B2 (ja) | 1994-11-02 |
WO1991009172A1 (en) | 1991-06-27 |
DE69019737D1 (de) | 1995-06-29 |
EP0458973A4 (en) | 1992-06-03 |
JPH03185200A (ja) | 1991-08-13 |
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