EP1355282B1 - Manufacture of article surveillance tags - Google Patents
Manufacture of article surveillance tags Download PDFInfo
- Publication number
- EP1355282B1 EP1355282B1 EP02394040A EP02394040A EP1355282B1 EP 1355282 B1 EP1355282 B1 EP 1355282B1 EP 02394040 A EP02394040 A EP 02394040A EP 02394040 A EP02394040 A EP 02394040A EP 1355282 B1 EP1355282 B1 EP 1355282B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- bias
- elements
- resonator
- cutter
- 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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Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2428—Tag details
- G08B13/2437—Tag layered structure, processes for making layered tags
- G08B13/244—Tag manufacturing, e.g. continuous manufacturing processes
Definitions
- the invention relates to manufacture of article surveillance tags of the type comprising a bias strip mounted over at least one resonator strip in a sealed label package.
- Such a tag has been produced by Sensormatic Corp. for use in surveillance of a wide variety of articles such as CDs, DVDs, and books.
- the packaging has an adhesive side for bonding of the tag to the article, and the opposed side has a code such as a bar code imprinted on it.
- the tag packaging encloses a bias element and one or two resonator elements. In use, if a tag is brought into the field of a security pedestal the resonators resonate according to the pedestal transmit frequency and bias of the bias element.
- US6371187 describes a production system for the manufacture of security tags at a continuous production line having bias and resonator material feed stations and a housing supply station.
- US6067016 and US5495230 describe surveillance tags having bias and resonator elements.
- Such surveillance tags are a high-volume low-cost item, and typically one is placed on every article in a shop. However, they must also be produced to a very fine tolerance, particularly in terms of the sizes of the bias and resonator elements. Also, the bias and resonator elements are of expensive composite materials, and excessive scrappage can be very costly. Another aspect of tag production is that there is a requirement to manufacture tags having resonator elements of different frequency responses, and correspondingly different bias elements. For every shift in category of bias element the resonator frequency is increased or decreased by a step value of, say, 75Hz.
- the invention is directed towards providing for high-volume efficient tag manufacture with strict adherence to quality criteria and with low scrappage rates. Another object is to achieve excellent versatility for efficient changing between different tag categories.
- a method of producing surveillance tags each comprising a bias element and a resonator element contained within a plastics housing, the method comprising:-
- the method comprises the further step of performing in-process testing after the rotary table.
- the in-process testing comprises feeding each tag through a field simulator coil and monitoring frequency and amplitude of each tag's response.
- the bias elements are produced by:
- the feed block comprises a slot for the web.
- the slot comprises upwardly and inwardly-extending side walls for retention of the web.
- a plurality of webs are drawn side-by-side from different reels, and there is a pair of drive rollers for each web.
- all webs are drawn over a single feed block and a single cutter block.
- the cutter is driven in a reciprocating motion by a cam follower.
- the cutter is a cutting edge on opposed sides, and the cutter is flipped over to use the other edge when a first edge becomes worn.
- the resonator elements are produced in the method as defined above for producing the bias elements.
- a surveillance tag 1 comprises a bar code 3 printed on a styrene casing 5.
- the tag 1 is of the type for adhering to articles stocked in shops.
- the tag 1 comprises:-
- the tags 1 are produced at a rate of over two million per 24-hour production period in a method 20, shown in Fig. 2.
- a step 21 four cells A, B, C, and D each having four workstations produce resonator elements.
- the cells are organised to produce according to expected downstream demand.
- Each cell produces a particular category of resonator element.
- Production of each resonator element involves drawing a web of resonator material from a reel and cutting pieces to the desired length. As the elements drop down an outlet chute they are individually tested to check the frequency response. The result of the test on one piece is used to dynamically adjust cutting parameters to choose the length of the next piece.
- Bias elements are produced in step 22. Again, a web of bias material is drawn from a reel and elements are cut by descending cutters. In this case there is no need for individual frequency or other test because the bias element frequency response is not important to the end product. Step 22 is described in more detail below.
- Pneumatic robots around a rotary table perform the following operations in succession:
- step 24 the sheets are cut into individual labels and are passed through a field simulator coil to check for correct frequency and amplitude.
- step 27 there is a cosmetic inspection and the sheets are magnetised. Finally, the sheets are packed in step 28.
- a workstation 40 for producing the bias elements 12 is illustrated.
- Webs 41 and 42 of bias material are drawn from reels.
- the web 41 runs in a path around:
- the web 42 is drawn from a reel 49 around:
- the final rollers 48 and 54 deliver the webs 41 and 42 respectively side-by-side to a cutting head 55 having a feed device 70 on a base plate 56.
- the head 55 also comprises an outlet chute 57 for delivery of bias elements 12 to output stacks.
- a cam follower 60 is driven by a cam 61 so that it reciprocates up and down at a frequency of 340 Hz.
- the cam follower 60 supports a pair of side-by-side cutters 62 which cut the webs 41 and 42 against a cutting block 63.
- Feeding of the webs 41 and 42 is very important as, previously, this function has led to considerable downtime and scrappage. It should be appreciated that the web material is very thin (46 microns) and is prone to breaking.
- the pressure on the arms 47 and 53 is maintained at a constant and correct level by a motor controller which uses an optical sensor indicating position of the dancer arms.
- the feed device 40 helps to ensure consistent and high speed (175.6 mm/s) delivery of web to the cutting block.
- the webs 41 and 42 run between a pair of rollers 71(a) and 71(b) and over a feed block 72.
- the feed block 72 comprises a ramp 74 shaped to fit between the rollers 71(a) and 71(b), thus minimising the chance of the web losing tension and orientation between the rollers 71(a) and 71(b) and the block 72.
- the webs 41 and 42 run through slots 73 having side walls 75 which taper inwardly to retain the webs 41 and 42.
- the feed device 70 delivers the webs 41 and 42 to run on a cutter block 63 comprising a top adjustable plate 64 and a base plate 65.
- the top plate 64 comprises four fastening apertures 66, each of which may be used to retain the top plate 64 on the base plate 65.
- the top plate 64 may be flipped over to utilise the lower surface as viewed in Fig. 8.
- the cutters 62 are double-sided and may be turned around so that the top edge a viewed in Fig. 8 is used for cutting.
- the feeding and cutting features of the workstations 40 are also employed in the resonator cutting workstations as similar cutting and material parameters exists.
- bias and resonator cell arrangement all contribute to efficient production with a high volume. They also help to minimise scrappage, and achieve a high quality.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Burglar Alarm Systems (AREA)
- Making Paper Articles (AREA)
- Seeds, Soups, And Other Foods (AREA)
Abstract
Description
- The invention relates to manufacture of article surveillance tags of the type comprising a bias strip mounted over at least one resonator strip in a sealed label package.
- Such a tag has been produced by Sensormatic Corp. for use in surveillance of a wide variety of articles such as CDs, DVDs, and books. Typically, the packaging has an adhesive side for bonding of the tag to the article, and the opposed side has a code such as a bar code imprinted on it. The tag packaging encloses a bias element and one or two resonator elements. In use, if a tag is brought into the field of a security pedestal the resonators resonate according to the pedestal transmit frequency and bias of the bias element.
- US6371187 describes a production system for the manufacture of security tags at a continuous production line having bias and resonator material feed stations and a housing supply station. US6067016 and US5495230 describe surveillance tags having bias and resonator elements.
- Such surveillance tags are a high-volume low-cost item, and typically one is placed on every article in a shop. However, they must also be produced to a very fine tolerance, particularly in terms of the sizes of the bias and resonator elements. Also, the bias and resonator elements are of expensive composite materials, and excessive scrappage can be very costly. Another aspect of tag production is that there is a requirement to manufacture tags having resonator elements of different frequency responses, and correspondingly different bias elements. For every shift in category of bias element the resonator frequency is increased or decreased by a step value of, say, 75Hz.
- Thus, the invention is directed towards providing for high-volume efficient tag manufacture with strict adherence to quality criteria and with low scrappage rates. Another object is to achieve excellent versatility for efficient changing between different tag categories.
- According to the invention, there is provided a method of producing surveillance tags each comprising a bias element and a resonator element contained within a plastics housing, the method comprising:-
- drawing a web of resonator material from a reel and cutting the web to provide the resonator elements;
- drawing a web of bias material from a reel and cutting the web to provide the bias elements;
- forming a first casing layer into a plurality of recesses in a grid pattern, and placing at least one resonator element and a bias element into each recess;
- placing a second casing layer over the first casing layer and the elements, sealing around the recesses, and cutting between the recesses to provide individual tags;
- the casing layer and element placement operations being performed by robots,
wherein
the bias and resonator elements are produced at workstations which are grouped into cells, each cell producing a resonator element or a bias element of a particular type, and in which the resonator elements are individually tested for frequency response and the test results are used to dynamically change cutting parameters, and
the casing layer and element placement operations are performed around a rotary workfeed table. -
- In one embodiment, the method comprises the further step of performing in-process testing after the rotary table.
- In another embodiment, the in-process testing comprises feeding each tag through a field simulator coil and monitoring frequency and amplitude of each tag's response.
- In one embodiment, the bias elements are produced by:
- drawing the web of bias material from a reel and around a plurality of fixed and dancing rollers,
- drive rollers on opposed sides of the web drawing the web between them and feeding it over a feed block having a ramped feeding portion extending between the drive rollers, and
- cutting the web in repeated cycles of a reciprocating cutter over a cutter block downstream of the feed block.
-
- In one embodiment, the feed block comprises a slot for the web.
- In another embodiment, the slot comprises upwardly and inwardly-extending side walls for retention of the web.
- In a further embodiment, a plurality of webs are drawn side-by-side from different reels, and there is a pair of drive rollers for each web.
- In one embodiment, all webs are drawn over a single feed block and a single cutter block.
- In another embodiment, there is a single cutter associated with each web.
- In a further embodiment, the cutter is driven in a reciprocating motion by a cam follower.
- In one embodiment, the cutter is a cutting edge on opposed sides, and the cutter is flipped over to use the other edge when a first edge becomes worn.
- In another embodiment, the resonator elements are produced in the method as defined above for producing the bias elements.
- The invention will be more clearly understood from the following description of some embodiments thereof, given by way of example only with reference to the accompanying drawings in which:-
- Fig. 1(a) is a perspective view from above of a surveillance tag produced by a method of the invention, and Fig. 1(b) is a diagrammatic exploded cross-sectional view of the tag;
- Fig. 2 is a flow diagram of the production method;
- Fig. 3 is a side view of the bias element cutting workstation;
- Fig. 4 is a perspective view from above of a cutting head of the workstation;
- Fig. 5 is a side view, Fig. 6 is a cross-sectional end view in the direction of the arrows VI-VI of Fig. 5, and Fig. 7 is a perspective view from above of a web feeder of the bias cutting workstation; and
- Fig. 8 is a diagrammatic front view of the cutting head.
-
- Referring to Figs. 1(a) and 1(b) a
surveillance tag 1 comprises a bar code 3 printed on astyrene casing 5. Thetag 1 is of the type for adhering to articles stocked in shops. In more detail, as shown in Fig. 1(b) thetag 1 comprises:- - 10: a transparent sticky-back placement layer,
- 11: a transparent lidstock layer,
- 12: a bias element,
- 13: a separation layer,
- 14: two resonator elements (this varies according to label type)
- 5: outer styrene layer (with imprinted bar code).
-
- The
tags 1 are produced at a rate of over two million per 24-hour production period in amethod 20, shown in Fig. 2. In astep 21 four cells A, B, C, and D each having four workstations produce resonator elements. The cells are organised to produce according to expected downstream demand. - Each cell produces a particular category of resonator element. Production of each resonator element involves drawing a web of resonator material from a reel and cutting pieces to the desired length. As the elements drop down an outlet chute they are individually tested to check the frequency response. The result of the test on one piece is used to dynamically adjust cutting parameters to choose the length of the next piece.
- Bias elements are produced in
step 22. Again, a web of bias material is drawn from a reel and elements are cut by descending cutters. In this case there is no need for individual frequency or other test because the bias element frequency response is not important to the end product.Step 22 is described in more detail below. - Pneumatic robots around a rotary table perform the following operations in succession:
-
place styrene layer 5 and press to form an array of recesses, one recess per label to be produced, - place each
resonator element 14 in each recess, and in turn deposit theseparation layer 13, - place a
bias element 12 in each recess, - place transparent lidstock layer 11,
- heat seal the lidstock layer 11 to the
separation layer 13 and thestyrene layer 5, and place thesticky placement layer 10. -
- In
step 24 the sheets are cut into individual labels and are passed through a field simulator coil to check for correct frequency and amplitude. - The sheets are die-cut and slit in
steps step 27 there is a cosmetic inspection and the sheets are magnetised. Finally, the sheets are packed instep 28. - Referring to Fig. 3 a
workstation 40 for producing thebias elements 12 is illustrated.Webs web 41 runs in a path around: - a fixed
lower roller 44, - a fixed upper roller 45(a),
- a dancing roller 46(b) on an
arm 47, - a fixed upper roller 45(b),
- a dancing roller 46(b) on the
arm 47, and - a fixed
final roller 48. -
- The
web 42 is drawn from areel 49 around: - a lower fixed
roller 43, - a first upper fixed roller 51(a),
- a first dancing roller 52(a) on an
arm 53, - a second fixed upper roller 51(b),
- a second dancing roller 52(b) on the
arm 53, - a third fixed upper roller 51(c), and
- a final fixed
roller 54. -
- The
final rollers webs head 55 having afeed device 70 on abase plate 56. Thehead 55 also comprises anoutlet chute 57 for delivery ofbias elements 12 to output stacks. - Referring to Figs. 4 to 8 the cutting
head 55 is now described in more detail. Acam follower 60 is driven by a cam 61 so that it reciprocates up and down at a frequency of 340 Hz. Thecam follower 60 supports a pair of side-by-side cutters 62 which cut thewebs block 63. - Feeding of the
webs arms - Also, it has been found that use of two dancing rollers helps to achieve the desired tension without significant risk of excessive tension causing breakage.
- Further, the
feed device 40 helps to ensure consistent and high speed (175.6 mm/s) delivery of web to the cutting block. Thewebs feed block 72. Thefeed block 72 comprises aramp 74 shaped to fit between the rollers 71(a) and 71(b), thus minimising the chance of the web losing tension and orientation between the rollers 71(a) and 71(b) and theblock 72. On theblock 72 thewebs slots 73 havingside walls 75 which taper inwardly to retain thewebs - The
feed device 70 delivers thewebs cutter block 63 comprising a topadjustable plate 64 and abase plate 65. Thetop plate 64 comprises four fastening apertures 66, each of which may be used to retain thetop plate 64 on thebase plate 65. Thus, there are three possible top plate lateral positions as viewed in Fig. 8. Furthermore, thetop plate 64 may be flipped over to utilise the lower surface as viewed in Fig. 8. - Also, the
cutters 62 are double-sided and may be turned around so that the top edge a viewed in Fig. 8 is used for cutting. - The feeding and cutting features of the
workstations 40 are also employed in the resonator cutting workstations as similar cutting and material parameters exists. - It will be appreciated that the bias and resonator cell arrangement, the web feeding mechanisms, and the rotary table features all contribute to efficient production with a high volume. They also help to minimise scrappage, and achieve a high quality.
- The invention is not limited to the embodiments described but may be varied in construction and detail.
Claims (12)
- A method of producing surveillance tags (1) each comprising a bias element (12) and a resonator element (14) contained within a plastics housing, the method comprising:-drawing a web of resonator material from a reel and cutting the web to provide the resonator elements;drawing a web (41) of bias material from a reel and cutting the web to provide the bias elements;forming a first casing layer (5) into a plurality of recesses in a grid pattern, and placing at least one resonator element and a bias element into each recess;placing a second casing layer (10) over the first casing layer and the elements, sealing around the recesses, and cutting between the recesses to provide individual tags; the casing layer and element placement operations being performed by robots, whereinthe bias and resonator elements are produced at workstations which are grouped into cells (21, 22), each cell producing a resonator element or a bias element of a particular type, and in which the resonator elements (14) are individually tested for frequency response and the test results are used to dynamically change cutting parameters, andthe casing layer and element placement operations are performed around a rotary workfeed table (23).
- A method as claimed in claim 1, wherein the method comprises the further step of performing in-process testing (24) after the rotary table.
- A method as claimed in claim 2, wherein the in-process testing (24) comprises feeding each tag through a field simulator coil and monitoring frequency and amplitude of each tag's response.
- A method as claimed in any preceding claim, wherein the bias elements (12) are produced by:drawing the web (41, 42) of bias material from a reel and around a plurality of fixed and dancing rollers,drive rollers (71(a), 71(b)) on opposed sides of the web drawing the web between them and feeding it over a feed block (72) having a ramped feeding portion (74) extending between the drive rollers (71(a), 71(b)), andcutting the web (41, 42) in repeated cycles of a reciprocating cutter (62) over a cutter block (64, 65) downstream of the feed block.
- A method as claimed in claim 4, wherein the feed block comprises a slot (73) for the web.
- A method as claimed in claim 5, wherein the slot (73) comprises upwardly and inwardly-extending side walls (75) for retention of the web.
- A method as claimed in any of claims 4 to 6, wherein a plurality of webs are drawn side-by-side from different reels, and there is a pair of drive rollers (71(a), 71(b)) for each web.
- A method as claimed in claim 7, wherein all webs are drawn over a single feed block and a single cutter block.
- A method as claimed in claim 8, wherein there is a single cutter associated with each web.
- A method as claimed in any of claims 4 to 9, wherein the cutter (62) is driven in a reciprocating motion by a cam follower.
- A method as claimed in claim 10, wherein the cutter is a cutting edge on opposed sides, and the cutter is flipped over to use the other edge when a first edge becomes worn.
- A method as claimed in any of claims 4 to 11, wherein the resonator elements are produced in the method of claims 4 to 11 for producing the bias elements.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT02394040T ATE304198T1 (en) | 2002-04-17 | 2002-04-17 | PRODUCTION OF GOODS SECURITY LABELS |
IE20020274A IE83388B1 (en) | 2002-04-17 | 2002-04-17 | Manufacture of article surveillance tags |
DE60206018T DE60206018D1 (en) | 2002-04-17 | 2002-04-17 | Production of retail security labels |
EP02394040A EP1355282B1 (en) | 2002-04-17 | 2002-04-17 | Manufacture of article surveillance tags |
IE20020275A IES20020275A2 (en) | 2002-04-17 | 2002-04-17 | Manufacture of article surveillance tags |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02394040A EP1355282B1 (en) | 2002-04-17 | 2002-04-17 | Manufacture of article surveillance tags |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1355282A1 EP1355282A1 (en) | 2003-10-22 |
EP1355282B1 true EP1355282B1 (en) | 2005-09-07 |
Family
ID=28459609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02394040A Expired - Lifetime EP1355282B1 (en) | 2002-04-17 | 2002-04-17 | Manufacture of article surveillance tags |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1355282B1 (en) |
AT (1) | ATE304198T1 (en) |
DE (1) | DE60206018D1 (en) |
IE (2) | IES20020275A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102169615A (en) * | 2011-02-22 | 2011-08-31 | 厦门振泰成科技有限公司 | Method for making electromagnetic label |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070194927A1 (en) * | 2006-02-15 | 2007-08-23 | Johannes Maximilian Peter | Electronic article surveillance marker |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5495230A (en) * | 1994-06-30 | 1996-02-27 | Sensormatic Electronics Corporation | Magnetomechanical article surveillance marker with a tunable resonant frequency |
US6096153A (en) * | 1997-05-22 | 2000-08-01 | Wallace Computer Services, Inc. | System for continuously manufacturing security tags |
US6067016A (en) * | 1997-06-02 | 2000-05-23 | Avery Dennison Corporation | EAS marker and method of manufacturing same |
-
2002
- 2002-04-17 EP EP02394040A patent/EP1355282B1/en not_active Expired - Lifetime
- 2002-04-17 IE IE20020275A patent/IES20020275A2/en not_active IP Right Cessation
- 2002-04-17 IE IE20020274A patent/IE83388B1/en not_active IP Right Cessation
- 2002-04-17 DE DE60206018T patent/DE60206018D1/en not_active Expired - Lifetime
- 2002-04-17 AT AT02394040T patent/ATE304198T1/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102169615A (en) * | 2011-02-22 | 2011-08-31 | 厦门振泰成科技有限公司 | Method for making electromagnetic label |
CN102169615B (en) * | 2011-02-22 | 2012-11-21 | 厦门振泰成科技有限公司 | Method for making electromagnetic label |
Also Published As
Publication number | Publication date |
---|---|
IES20020275A2 (en) | 2003-01-08 |
EP1355282A1 (en) | 2003-10-22 |
ATE304198T1 (en) | 2005-09-15 |
IE83388B1 (en) | 2004-04-21 |
IE20020274A1 (en) | 2003-10-29 |
DE60206018D1 (en) | 2005-10-13 |
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