US20020058138A1 - Security thread and process for the preparation thereof - Google Patents
Security thread and process for the preparation thereof Download PDFInfo
- Publication number
- US20020058138A1 US20020058138A1 US10/033,494 US3349401A US2002058138A1 US 20020058138 A1 US20020058138 A1 US 20020058138A1 US 3349401 A US3349401 A US 3349401A US 2002058138 A1 US2002058138 A1 US 2002058138A1
- Authority
- US
- United States
- Prior art keywords
- film
- water
- security thread
- metal
- regular interval
- 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.)
- Abandoned
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
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
Definitions
- the present invention relates to a security thread having unique security features suitable for use in security articles and process for the preparation thereof. Specifically, the present invention relates to a partially metallized film for a security thread having a dyed region and a transparent region alternately at an each regular interval on a major surf ace thereof, in the form of a figure, character or pattern.
- Security documents such as bank notes, stocks, bonds, checks, warrants and identification cards need to be guarded by antifalsification measures and they are of ten made from a security paper having a security element in the form of fibers, strips or threads embedded therein.
- GB 2,213,098 discloses a partially metallized film strip, used as a security thread, which has metal-free portions in the form of a pattern, design, indicia, etc. to provide a continuous metal path along the length of the strip.
- Japanese Laid-open Patent Publication No. 216795/1988 teaches a security strip having a metallized pattern on the surface of a transparent film.
- U.S. Pat. No. 5,876,068, discloses a security element comprising a transparent plastic film having an opaque coating extending over the element with recesses corresponding to patterns to be introduced and in areas congruent with the recesses, at least one of coloring substances and luminescent substances which cause the patterns to differ from the security element and from the opaque coating by color contrast under suitable light conditions.
- a partially metallized film for a security thread having a dyed region and a transparent region alternately at an each regular interval on a major surface thereof, the regions being in the form of a figure, character or pattern.
- FIGS. 1 to 4 show the steps of forming a partially-metallized film having a transparent region in the form of a set of characters and a dyed region in the form of another set of characters in accordance with one embodiment of the present invention.
- FIGS. 5 and 6 illustrate other embodiments of security threads in accordance with the present invention.
- the inventive security thread in the form of a partially metallized film is characterized by having a dyed region and a demetallized (i.e., transparent) region alternately at an each regular interval on a major surface thereof.
- the dyed region and the demetallized region may be in the form of a figure, character or pattern and be preferably present in a longitudinal direction of the film.
- the substrate which may be used in the inventive security thread may be made from any material known in the art such as a polyester (e.g., polyethylene terephthalate (PET)), polyvinyl chloride, polypropylene and the like.
- PET polyethylene terephthalate
- PVC polyvinyl chloride
- polypropylene polypropylene
- inventive partially metallized security thread may be prepared as follows:
- the fluorescent pigment or dyestuff is applied to a major surface of a transparent base film, as a substrate, at a regular interval.
- the fluorescent pigment or dyestuff may be any one conventionally used in the art and it may be applied in the form of a character, pattern or figure, or a combination thereof, preferably by a gravure printing method.
- a water-based ink which is soluble in water, is applied over the pigment or dyestuff-printed regions to form a mask for the dyed portion and simultaneously, the water-based ink is applied and to another selected portions of the major surface of the film at a regular interval, in the form of a character, pattern or figure.
- the water-based ink may be any one conventionally used in the art.
- a layer of a metal is deposited on the entire surface of the film including the printed ink layer.
- the deposition may be carried out by vacuum metallizing methods, which are well known by a skilled person in the art.
- Representative examples of the metal suitable for forming the metal layer are aluminum, tin, a metal alloy (e.g., Co and Ni), silver and the like.
- the thickness of the metal layer ranges from 1 ⁇ (Aungstrom) to 2 ⁇ m.
- the metal-deposited film is then washed with water, preferably with brushing or spraying, to remove the portion of the metal layer deposited on the water-soluble ink layer, to obtain a partially metallized film having a dyed region and a demetallized region alternately at an each regular interval on a major surface thereof.
- the security thread of the present invention has a thickness and width suitable for use in security documents, e.g., a thickness ranging from about 15 to 35 ⁇ m and a width ranging from 0.5 to 5 mm.
- the security thread of the present invention may be preferably embedded between two sheets of paper formed separately on a paper making machine and subsequently brought together to form a security paper having an embedded security thread.
- FIGS. 1 to 4 show the steps of forming a partially-metallized film having a transparent region in the form of a set of characters and a dyed region in the form of another set of characters, alternately, in accordance with one embodiment of the present invention.
- a fluorescent dye stuff or pigment composition such as LUMILUX CD 305 , CD 316 or PAPILION is applied in the form of a set of characters ( 2 ) on the surface of a transparent polyester substrate ( 10 ) at a regular interval by a gravure printing method.
- a water-based ink is printed on the film to form a mask ( 30 ) of the printed characters portion ( 2 ) and, simultaneously, a design ( 31 ) in the form of another set of characters.
- Aluminum is deposited on the resulting film by a vacuum deposition method to form an aluminum layer ( 4 ) at a thickness of 1 ⁇ (Aungstrom) to 2 ⁇ m over the entire surface of the film, as shown in FIG. 3.
- the portions of the aluminum layer deposited on the mask ( 30 ) and the design ( 31 ) are removed by washing with water, while brushing, to obtain an aluminum-deposited film ( 1 ) comprising transparent characters ( 5 ) (corresponds to the design ( 31 )) and printed characters ( 2 ) positioned in a transparent region ( 10 ).
- FIGS. 5 and 6 illustrate other embodiments of security threads prepared by the inventive process.
- FIG. 5 shows a security thread ( 1 ) having alternating metal-deposited portion ( 4 ) comprising transparent characters ( 5 ), and transparent substrate region ( 10 ) comprising colored characters ( 2 ) at a regular interval.
- FIG. 6 shows a security thread ( 1 ) obtained by a chain of imprinting alternating colored ( 2 ) and metallized links ( 4 ) on a base film ( 10 ).
Landscapes
- Paper (AREA)
- Laminated Bodies (AREA)
- Printing Methods (AREA)
Abstract
A partially metallized film having a dyed region and a transparent region alternately at an each regular interval on a major surface thereof is useful as a security thread to be embedded in a security paper. The partially metallized film for a security thread is conveniently prepared by printing a fluorescent pigment or dyestuff at a regular interval on a transparent film, applying a water-soluble ink over the dyed regions and to another selected portions of the film at a regular interval, depositing a layer of a metal on the entire surface of the transparent film including the water-soluble ink layer; and washing the metal deposited film with water to remove the portion of the metal layer deposited on the water-soluble ink layer.
Description
- This application is a continuation-in-partCIP) application of U.S. Ser. No. 09/623,862 filed on Sep. 1, 2000, which is now abandoned and claims priority thereon pursuant to 35 USC section 120.
- The present invention relates to a security thread having unique security features suitable for use in security articles and process for the preparation thereof. Specifically, the present invention relates to a partially metallized film for a security thread having a dyed region and a transparent region alternately at an each regular interval on a major surf ace thereof, in the form of a figure, character or pattern.
- Security documents such as bank notes, stocks, bonds, checks, warrants and identification cards need to be guarded by antifalsification measures and they are of ten made from a security paper having a security element in the form of fibers, strips or threads embedded therein.
- For example, GB 2,213,098 discloses a partially metallized film strip, used as a security thread, which has metal-free portions in the form of a pattern, design, indicia, etc. to provide a continuous metal path along the length of the strip.
- Further, Japanese Laid-open Patent Publication No. 216795/1988 teaches a security strip having a metallized pattern on the surface of a transparent film.
- U.S. Pat. No. 5,876,068, on the other hand, discloses a security element comprising a transparent plastic film having an opaque coating extending over the element with recesses corresponding to patterns to be introduced and in areas congruent with the recesses, at least one of coloring substances and luminescent substances which cause the patterns to differ from the security element and from the opaque coating by color contrast under suitable light conditions.
- There still exists a need to develop various security threads having enhanced unique features.
- It is, therefore, an object of the present invention to provide a security thread having enhanced security features, suitable for use in a security paper.
- It is another object of the present invention to provide a process for the inventive security thread.
- It is still another object of the present invention to provide a security paper containing the inventive security thread.
- In accordance with an aspect of the present invention, there is provided a partially metallized film for a security thread having a dyed region and a transparent region alternately at an each regular interval on a major surface thereof, the regions being in the form of a figure, character or pattern.
- In accordance with an aspect of the present invention, there is provided a process for the preparation of the inventive partially metallized film for a security thread, which comprises:
- (i) printing a fluorescent pigment or dyestuff at a regular interval on a major surface of a transparent film in the form of a figure, character or pattern;
- (ii) applying a water-soluble ink over the pigment or dyestuff-printed regions and to another selected portions of the major surface of the film at a regular interval in the form of a figure, character or pattern;
- (iii) depositing a layer of a metal on the entire surface of the transparent film including the water-soluble ink layer; and
- (iv) washing the metal deposited film with water to remove the portion of the metal layer deposited on the water-soluble ink layer.
- The above and other objects and features of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawing, wherein:
- FIGS.1 to 4 show the steps of forming a partially-metallized film having a transparent region in the form of a set of characters and a dyed region in the form of another set of characters in accordance with one embodiment of the present invention; and
- FIGS. 5 and 6 illustrate other embodiments of security threads in accordance with the present invention.
- The inventive security thread in the form of a partially metallized film is characterized by having a dyed region and a demetallized (i.e., transparent) region alternately at an each regular interval on a major surface thereof. In the present invention, the dyed region and the demetallized region may be in the form of a figure, character or pattern and be preferably present in a longitudinal direction of the film.
- The substrate which may be used in the inventive security thread, may be made from any material known in the art such as a polyester (e.g., polyethylene terephthalate (PET)), polyvinyl chloride, polypropylene and the like.
- The inventive partially metallized security thread may be prepared as follows:
- At first, the fluorescent pigment or dyestuff is applied to a major surface of a transparent base film, as a substrate, at a regular interval. The fluorescent pigment or dyestuff may be any one conventionally used in the art and it may be applied in the form of a character, pattern or figure, or a combination thereof, preferably by a gravure printing method.
- Thereafter, a water-based ink, which is soluble in water, is applied over the pigment or dyestuff-printed regions to form a mask for the dyed portion and simultaneously, the water-based ink is applied and to another selected portions of the major surface of the film at a regular interval, in the form of a character, pattern or figure. The water-based ink may be any one conventionally used in the art.
- Subsequently, a layer of a metal is deposited on the entire surface of the film including the printed ink layer. The deposition may be carried out by vacuum metallizing methods, which are well known by a skilled person in the art. Representative examples of the metal suitable for forming the metal layer are aluminum, tin, a metal alloy (e.g., Co and Ni), silver and the like. The thickness of the metal layer ranges from 1 Å (Aungstrom) to 2 μm.
- The metal-deposited film is then washed with water, preferably with brushing or spraying, to remove the portion of the metal layer deposited on the water-soluble ink layer, to obtain a partially metallized film having a dyed region and a demetallized region alternately at an each regular interval on a major surface thereof.
- The security thread of the present invention has a thickness and width suitable for use in security documents, e.g., a thickness ranging from about 15 to 35 μm and a width ranging from 0.5 to 5 mm.
- The security thread of the present invention may be preferably embedded between two sheets of paper formed separately on a paper making machine and subsequently brought together to form a security paper having an embedded security thread.
- FIGS.1 to 4 show the steps of forming a partially-metallized film having a transparent region in the form of a set of characters and a dyed region in the form of another set of characters, alternately, in accordance with one embodiment of the present invention.
- Referring to FIG. 1, a fluorescent dye stuff or pigment composition such as LUMILUX CD305, CD 316 or PAPILION is applied in the form of a set of characters (2) on the surface of a transparent polyester substrate (10) at a regular interval by a gravure printing method.
- Subsequently, as shown in FIG. 2, a water-based ink is printed on the film to form a mask (30) of the printed characters portion (2) and, simultaneously, a design (31) in the form of another set of characters.
- Aluminum is deposited on the resulting film by a vacuum deposition method to form an aluminum layer (4) at a thickness of 1 Å (Aungstrom) to 2 μm over the entire surface of the film, as shown in FIG. 3.
- Finally, the portions of the aluminum layer deposited on the mask (30) and the design (31) are removed by washing with water, while brushing, to obtain an aluminum-deposited film (1) comprising transparent characters (5) (corresponds to the design (31)) and printed characters (2) positioned in a transparent region (10).
- FIGS. 5 and 6 illustrate other embodiments of security threads prepared by the inventive process.
- Specifically, FIG. 5 shows a security thread (1) having alternating metal-deposited portion (4) comprising transparent characters (5), and transparent substrate region (10) comprising colored characters (2) at a regular interval. Further, FIG. 6 shows a security thread (1) obtained by a chain of imprinting alternating colored (2) and metallized links (4) on a base film (10).
- While the invention has been described with respect to the specific embodiments, it should be recognized that various modifications and changes may be made by those skilled in the art to the invention which also fall within the scope of the invention as defined by the appended claims.
Claims (4)
1. A partially metallized film for a security thread having a dyed region and a transparent region alternately at an each regular interval on a major surface thereof, the regions being in the form of a figure, character or pattern.
2. The partially metallized film for a security thread according to claim 1 , wherein the film is prepared by a process comprising the steps of
(i) printing a fluorescent pigment or dyestuff at a regular interval on a major surface of a transparent film in the form of a figure, character or pattern;
(ii) applying a water-soluble ink over the pigment or dyestuff-printed regions and to another selected portions of the major surface of the film at a regular interval in the form of a figure, character or pattern;
(iii) depositing a layer of a metal on the entire surface of the transparent film including the water-soluble ink layer; and
(iv) washing the metal deposited film with water to remove the portion of the metal layer deposited on the water-soluble ink layer.
3. The partially metallized film for a security thread according to claim 2 , wherein the metal is selected from the group consisting of aluminum, tin, silver and an alloy of cobalt and nickel.
4. The partially metallized film for a security thread according to claim 1 , wherein the film has a thickness ranging from 15 to 35 μm and a width ranging from 0.5 to 5 mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/033,494 US20020058138A1 (en) | 1998-03-02 | 2001-12-27 | Security thread and process for the preparation thereof |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980006706A KR19990073639A (en) | 1998-03-02 | 1998-03-02 | Manufacturing method of silver wire with partial deposition part and colored printing layer |
KR1998-6706 | 1998-03-02 | ||
US62386200A | 2000-09-01 | 2000-09-01 | |
US10/033,494 US20020058138A1 (en) | 1998-03-02 | 2001-12-27 | Security thread and process for the preparation thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US62386200A Continuation-In-Part | 1998-03-02 | 2000-09-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020058138A1 true US20020058138A1 (en) | 2002-05-16 |
Family
ID=26633479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/033,494 Abandoned US20020058138A1 (en) | 1998-03-02 | 2001-12-27 | Security thread and process for the preparation thereof |
Country Status (1)
Country | Link |
---|---|
US (1) | US20020058138A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080305313A1 (en) * | 2004-09-15 | 2008-12-11 | Crane & Co., Inc. | Security Device and Novel Anti-Counterfeit Product Employing Same |
US20090141961A1 (en) * | 2007-11-30 | 2009-06-04 | Honeywell International Inc. | Authenticatable mark, systems for preparing and authenticating the mark |
US20150028227A1 (en) * | 2013-05-17 | 2015-01-29 | Thomas D. Pawlik | System for authenticating an item |
-
2001
- 2001-12-27 US US10/033,494 patent/US20020058138A1/en not_active Abandoned
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080305313A1 (en) * | 2004-09-15 | 2008-12-11 | Crane & Co., Inc. | Security Device and Novel Anti-Counterfeit Product Employing Same |
US8287993B2 (en) | 2004-09-15 | 2012-10-16 | Crane & Co., Inc. | Security device and novel anti-counterfeit product employing same |
US20090141961A1 (en) * | 2007-11-30 | 2009-06-04 | Honeywell International Inc. | Authenticatable mark, systems for preparing and authenticating the mark |
US8330122B2 (en) | 2007-11-30 | 2012-12-11 | Honeywell International Inc | Authenticatable mark, systems for preparing and authenticating the mark |
US20150028227A1 (en) * | 2013-05-17 | 2015-01-29 | Thomas D. Pawlik | System for authenticating an item |
US9235796B2 (en) * | 2013-05-17 | 2016-01-12 | Eastman Kodak Company | System for authenticating an item |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5876068A (en) | Security element in the form of a thread or strip to be embedded in security documents and methods of producing it | |
US5388862A (en) | Security articles | |
US6474695B1 (en) | Security element in the form of a thread or be embedded in security and methods of producing it | |
KR930006823B1 (en) | Security paper | |
JP4861451B2 (en) | Improvements in papermaking | |
US5688587A (en) | Antifalsification paper having a thread- or band-shaped security element and a method for producing it | |
US5631039A (en) | Security thread, a film and a method of manufacture of a security thread | |
US6343745B1 (en) | Security device | |
RU2338646C2 (en) | Anti-deception paper | |
US6761378B2 (en) | Apparatus for maintaining the security of a substrate | |
US6199911B1 (en) | Security element for security paper | |
PL215155B1 (en) | Security element and method for producing the same | |
KR20040074073A (en) | Security element and method for producing the same | |
ITMI20011889A1 (en) | PROCEDURE AGAINST COUNTERFEITING AND COUNTERFEITING OF VALUABLE DOCUMENTS, IN PARTICULAR BANKNOTES | |
EP1064424B1 (en) | Improved process for the preparation of security thread | |
GB2250473A (en) | Security articles | |
CA1214038A (en) | Anticounterfeit metallized labels | |
US20020058138A1 (en) | Security thread and process for the preparation thereof | |
RU2309047C2 (en) | Protective element for banknotes, securities and documents in general | |
WO2020152505A1 (en) | Preparation of novel security threads and its application for anti-counterfeiting process | |
EP2138318B2 (en) | Safety element with ducts and method for producing same | |
KR100561289B1 (en) | One-ply magnetic security thread and security papers containing said one-ply magnetic security thread | |
KR100407249B1 (en) | Magnetic security thread for preventing counterfeit and the uses thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KOREA SECURITY PRINTING AND MINTING CORPORATION, K Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JONG-KYU;PARK, YONG-HWAN;REEL/FRAME:012423/0603 Effective date: 20011210 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |