EP0473635A1 - Machine et methode pour imprimer une feuille detachable sur une bande circulante. - Google Patents

Machine et methode pour imprimer une feuille detachable sur une bande circulante.

Info

Publication number
EP0473635A1
EP0473635A1 EP90907339A EP90907339A EP0473635A1 EP 0473635 A1 EP0473635 A1 EP 0473635A1 EP 90907339 A EP90907339 A EP 90907339A EP 90907339 A EP90907339 A EP 90907339A EP 0473635 A1 EP0473635 A1 EP 0473635A1
Authority
EP
European Patent Office
Prior art keywords
web
cylinder
die
tape
foil
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.)
Granted
Application number
EP90907339A
Other languages
German (de)
English (en)
Other versions
EP0473635B2 (fr
EP0473635B1 (fr
Inventor
Michael John Sliwa
Ian Michael Daines Gaylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leonhard Kurz Stiftung and Co KG
Original Assignee
Governor and Co of Bank of England
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10657492&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0473635(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Governor and Co of Bank of England filed Critical Governor and Co of Bank of England
Publication of EP0473635A1 publication Critical patent/EP0473635A1/fr
Application granted granted Critical
Publication of EP0473635B1 publication Critical patent/EP0473635B1/fr
Publication of EP0473635B2 publication Critical patent/EP0473635B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
    • B41F19/06—Printing and embossing between a negative and a positive forme after inking and wiping the negative forme; Printing from an ink band treated with colour or "gold"
    • B41F19/062—Presses of the rotary type

Definitions

  • This invention relates to the transfer of foil from a carrier to a moving web such as a web of paper by means of impression dies and particularly concerns the transfer of foil in the form of a device or discontinuous pattern on to bank notes or other security documents which are preprinted on a moving web.
  • the technique mentioned requires the application of heat and/or pressure for a substantial time dependent upon the heat and/or pressure employed.
  • the foil, the die and the paper must be relatively stationary for a significant period of time required to ensure that the foil is released from the carrier and is securely impressed on the sheet of paper. It is accordingly comparatively easy to impress foil using such a technique on to documents which are presented in cut sheet form.
  • the present invention concerns the transfer of foil on to a moving web which may be of paper or other materials such as polyesters.
  • a moving web which may be of paper or other materials such as polyesters.
  • it is common to print bank notes or other security documents on a web which moves at approximately 75 metres per minute, and it is inherently- difficult to ensure that the various elements remain relatively stationary for the period of time necessary for transfer of the foil.
  • a natural solution to the problem is to entrain the foil to move in the same direction as the web, for example by providing a cylindrical platen including a die and moving the foil carrier in synchronism with the web around the platen and applying pressure to the web while the foil carrier is disposed between the die and the web.
  • Such an arrangement can be made to .operate satisfactorily for the purpose of transferring foil on to the web.
  • such a technique is unsatisfactory for transfers of separate devices because the devices are spaced apart at least by the distance between successive documents on the paper and accordingly such a technique is very wasteful of foil, and is expensive at least in terms of the waste of time associated with the changing of spools of foil.
  • the present invention aims generally to provide a compact and versatile machine in which, at least in preferred forms, there is a substantial economy in the use of foil.
  • the invention includes further improvements which will become apparent from the following description. Summary of the Invention
  • the invention is based on the transfer of foil from a carrier tape to a moving web by pressing the web against a die which may be carried in a rotating cylinder, the foil carrier being fed between the die and the web and being transported between successive transfers in a direction generally transverse to the movement of the web.
  • the tape may be transported in a direction which is inclined relative to the direction in which the dies are spaced apart so that different dies transfer foil from regions which are spaced apart both along and across the strip and preferably, in a row aligned obliquely to the strip.
  • the tape may. be transported through a comparatively short distance between transfer operations and the wastage can be substantially reduced.
  • the foregoing technique is particularly suitable for impressing one device on each of a multiplicity of bank notes or security documents which are preprinted on the web in a multiplicity of rows or columns spaced apart across the width of the web.
  • Pressure may be applied to the web by means of a pressure roller or band which moves in correspondence with the movement of the web.
  • the band or roller may be driven but may idle in engagement with the cylinder.
  • a band may be carried between rollers or gears which tension the band and drive it so that it remains stationary relative to the paper in the region where the band extends around the said cylinder.
  • the said roller or band may also enable the printing cylinder to be driven by the web by virtue of the friction between the paper and the cylinder.
  • apparatus for transferring foil from a carrier tape to a moving web comprising a rotatable cylinder including at least one die, means for traversing the web around the cylinder, means rotatable with the cylinder for transporting the tape generally lengthwise of the cylinder and over the position of the die, and means for applying pressure to the web.
  • the means for transporting the tape may comprise a supply mechanism and a take-up mechanism which are carried on an assembly which rotates with the said cylinder.
  • the supply mechanism may comprise a spool and means such as a brake for maintaining tension in the tape
  • the take up mechanism may comprise a spool which includes or is associated with means operable to index the tape for a predetermined longitudinal movement each time the take-up mechanism passes through at least one predetermined position in an angular sense of rotation of the rotating cylinder.
  • the rotatable cylinder may include a set of impression dies spaced apart along a line which extends generally axially of the rotating cylinder, and the means for transporting the tape may include means for guiding the carrier in a direction such that the impression dies engage the tape from locations which are spaced both longitudinally along and transversely across the tape.
  • Figure 1 is a general view of a foil transfer machine, showing mainly the path of a web and the various rollers and drive mechanism;
  • Figure 2 illustrates a printing cylinder and associated foil transporting mechanism
  • Figure 3 illustrates a tape take-up reel assembly
  • Figure 4 illustrates a tape supply reel assembly
  • Figure 5 illustrates part of the take-up assembly
  • Figure 6 illustrates a further detail of the printing cylinder
  • Figure 7 illustrates a section through part of the printing cylinder
  • Figure 8 is another view of the part illustrated by Figure 7;
  • Figure 10 is another view of the region illustrated by Figure 9.
  • Figure 11 illustrates a section through the take-up assembly.
  • the following description is a description of a suitable embodiment of a foil transfer unit which is intended for transferring foil in small devices or patterns on to particular areas of a moving web of paper.
  • the invention is intended for use in the production of impressed foil devices on bank notes or other security documents though the invention may have utility in other contexts.
  • the general technique for transferring foil is well known. It requires a heated die which may for example be mounted in a heated platen, and a thermally transferable foil, which is normally a metal lamina secured releasably to a substrate. Pressing paper against the die, the foil with its substrate being interposed, for a period of time which depends upon the temperature and pressure, is sufficient to transfer the foil from the substrate to the paper in the pattern determined by the die.
  • Figure 1 illustrates the path of a paper web through one embodiment of a foil transfer unit according to the invention.
  • Figure 1 shows mainly the web, the rollers over which it passes, and in general schematic form, the drive arrangement for the rollers.
  • a steering unit comprising a roller 10 and a roller 10a which are mounted one at each end of a pivoted chassis 11 which can be rotated about a vertical axis so as to maintain the correct lateral position of the web within the foiling unit.
  • the web From the steering unit the web passes around a roller 12 and then a draw roller 13, which is driven by means later described from a motor 26. From the draw roller 13 the web passes over a fixed roller.14, and then to an input guide wheel 15 disposed at one end of a circumferential path, in this example a semicircular path 16, extending around a printing cylinder 17. The end of the path is defined by a second guide wheel 18 around which the web passes, proceeding thence to a roller 19.
  • the web shown at 2a, leaves the unit near the top of the machine.
  • a larger wheel 13a which is connected by a flexible drive coupling 20 to a wheel 21 which is in fixed rotational relationship with a larger wheel 22 linked by a flexible drive coupling 23 to a wheel 24.
  • the coupling 23 is tensioned by jockey wheel 25.
  • the wheel 24 is driven differentially relative to a wheel 24a by a variable ratio derived from a gearbox through which wheels 24 and-24a are coaxially connected.
  • the purpose of this mechanism, which varies the speed of the draw roller 13 relative to the impression cylinder 17, is to synchronise the pitch of the preprinted web 2 to the pitch of impression dies on the printing cylinder 17.
  • the angular position of the cylinder 17 is monitored by an encoder, and the position of the preprinted web coming off draw roller 13 is monitored using an optical sensor.
  • An error in the web's position relative to the correct position is used to cause a change in the gearbox ratio. This results in a change in tension in the web between the draw roll and the printing cylinder in a sense to eliminate the error.
  • this mechanism which is in generally known form, is not illustrated in Figure 1.
  • the wheel 24a is linked by means of a flexible drive coupling 27 to a wheel 26 driven by the output sh ⁇ ft of a motor M, a wheel 28, and two wheels 29 and 30 which tension the coupling 27.
  • the wheel 28 rotates with a pinion 31 which meshes with a pinion 32 that is fixed to rotate with a wheel 33.
  • the printing cylinder 17 is driven, in this embodiment, by at least one band and preferably at least two bands 34, 37 which may apply pressure on the rear of the paper so as to urge the paper against the dies which are carried by the printing cylinder, as will be described later.
  • the belt 34 is driven by the wheel 33, and passes over the roller 18, around the path 16, over the roller 15, around a tensioning roller 35 which is mounted on a moveable carriage 36 which is adjustable to alter the tension in the band 34.
  • Another drive and tensioning belt 37 is also carried on the roller 33, at a position axially displaced from the belt 34, and passes over roller 18, around path 16, over roller 15 and over roller 38 which is mqunted on carriage 39, which is ' adjustable to adjust the tension in the band 37.
  • the bands 34 and 37 may each be called an impression band because they serve to urge the web towards the cylinder in the manner of an impression roll which presses a sheet of paper against a printing cylinder.
  • the bands 34 and 37 are preferably made of a synthetic rubber or plastics material. They may each have a flat, smooth surface on the side which is to face the cylinder 5 and each may have its rear face formed as a toothed rack engaging co-operating gear teeth on the associated wheels so that the bands 34 and 37 are driven without slip.
  • pressure may be applied to the web where it passes over a die by a roller fitted in place of roller 15.
  • a pressure roller may either be an idler or be driven.
  • Figure 1 also shows diagrammatically a tape supply cassette assembly 49 which is mounted to rotate with the printing cylinder 17. Also mounted for rotation with the printing cylinder is a take-up assembly, described with reference to Figures 3 and 5.
  • Figure 2 illustrates one embodiment of a printing cylinder 17.
  • This cylinder includes in this example a set of dies 51, 52 and 53. These dies are in this embodiment aligned along an axis which extends parallel to the axis of the printing cylinder.
  • Each die can be held in a forward or impression position by a conical cam, the retraction of which allows the dies to retract under the action of return springs, to be described later.
  • there may be a" multiplicity of sets of dies spaced apart around the printing cylinder which may correspond in circumferential extent to an integral number of lengths of preprinted sheets, including the spacing therebetween, on the web.
  • the web of paper is wrapped around a substantial angle of the printing cylinder.
  • the printing cylinder is driven in synchronism with the web of paper so that each row of dies is brought into register with the locations on the documents in a particular row where it is desired to produce the foil devices. Since the printing cylinder and the paper web are driven synchronously, the paper will be stationary relative to the dies and the impression bands over a substantial angle of movement of the printing cylinder.
  • a cassette assembly 42 Carried at one side of the printing cylinder is a cassette assembly 42 including a spool .43 which takes up the foil transfer tape 48.
  • the tape is aligned in a direction which is inclined relative to the line 54 along which the dies 51, 52 and 53 are disposed.
  • the width of the tape should be such that all the dies in a given set can engage the carrier tape at the same time.
  • a circular track 45 In order to control the longitudinal transport or indexing of the tape 48 there is a circular track 45, of which only a small segment is shown in Figure 2.
  • This track 45 is coaxial with the axis of rotation of the printing cylinder 17 and is engaged by a roller follower 46 mounted on a lever 47.
  • the track is shaped to cause movement of the lever 47, and thereby indexing of the ratchet wheel and incremental transport of the tape 48 at some suitable time when the tape and dies are not in proximity to the web, that is to say at some point in the semicircular arc opposite the path 16.
  • FIGS 3, 5 and 11 show the take-up assembly 42 in greater detail.
  • a cassette 58 is mounted on a holder 57.
  • the spool 43 is associated with two pinch rollers 44 and 55, there being a small entrance guide roller 56 round which the tape enters the drive system from an elongate guide 59 connecting the supply and take-up assemblies and serving to guide the tape 48 between the printing cylinder and the web. This guide is described later with reference to Figures 7 to 10.
  • the roller 44 rotates with a coaxial ratchet wheel 63, which is controlled by a pawl 64 mounted by a pivot 67 on the arm 47.
  • the ratchet wheel is adjacent a pulley wheel 63a.
  • the adjacent side faces of the ratchet wheel 63 and the wheel 63a are in frictional engagement.
  • the wheel 63a is coupled by means of a flexible band 65 to a wheel 66 which is mounted on the axis of the spool 43. This arrangement forms a slipping drive to maintain foil tension on the take-up spool.
  • Each lifting of the follower 46 rocks the lever 47 about its pivot 47a (shown diagrammatically in Figure 5) and causes the pawl to push the ratchet wheel 63 and accordingly to produce one increment of longitudinal movement of the tape 48.
  • the guide 59 has a shallow, inverted U section.
  • the guide fits into an oblique slot 100 in the cylinder 17 and is held in place by tabs 101 held by screws 102 and extending over the margins 103 of the guide 59.
  • the tape passes through the narrow passageway 104 between the underside of the guide 59 and the bottom 105 of the slot 100.
  • Figure 4 illustrates schematically a tape supply mechanism 49.
  • This comprises a spool 50 which is mounted in a cassette 60 disposed in a holder 61.
  • the tape 48 is wound off the tape supply spool, passes round a small guide roller 62 and is pulled, by the take-up reel mechanism previously described, along and adjacent the guide 59.
  • the spool 50 preferably includes a brake to maintain tension in the tape.
  • FIG. 6 is a simplified sectional view of the printing cylinder 17.
  • the cylinder is mounted on two half shafts 68 and 69, -•which rotate on bearings 70 and 71 respectively.
  • Each tape take-up assembly 42 is mounted on the half shaft 69 and is located by means of a spigot 72 engaging an aperture 73 in the adjacent end plate 74 of the cylinder 17.
  • each tape supply assembly 49 is mounted on the half shaft 68 and is located in position by means of a spigot 75 engaging an aperture 76 in the adjacent end plate 77 of the cylinder 17.
  • the cylinder 17 includes as previously mentioned at least one row of retractable dies although in practice there are a plurality (e.g. twelve) of rows of dies each associated with a tape supply assembly and a take-up assembly. For convenience only one die is shown in Figure 6.
  • the region of the die 53 is illustrated in greater detail in Figures 9 and 10.
  • Figure 9 is a sectional view of the die assembly in a plane lengthwise of the guide 59 and
  • Figure 10 is a view in a plane transversely of the guide 59.
  • a die assembly is mounted in the peripheral wall 78 of the cylinder 17.
  • the wall has a circular aperture 79 which includes an internal annular shoulder 80.
  • a body 81 has a tubular part 82 which fits into the aperture 79 and an annular flange 83 which abuts the shoulder 80.
  • the flange may be secured to the wall 78 by means of at least one bolt 84.
  • Slidable within the body is a plunger 85 which has a central bore through which a fixing screw 86 secures the die 53 at the outer end of the plunger 85.
  • the plunger is biassed to a retracted position by means of a helical compression spring 87 between the plunger and the flange 83.
  • the inner face 88 of the plunger 85 is shaped to conform to a respective conical cam 90 ( Figure 6) .
  • the die 53 comprises a flanged bush 110 which is held within the plunger 85 by means of the screw 86 and a die plate 111 secured to the flange of the bush 110 by rivets 112 ( Figure
  • the tape 48 passes underneath the guide 59.
  • the guide 59 has a window 113 defined by two tapered portions 114, 115 of the guide. This window enables the web to be pressed against the tape and the die by the respective impression band or roller.
  • a guide 116 in the form of a bridge. This is apertured to accommodate the die 53.
  • the guide 116 serves to guide the tape from • the passageway to a position approximately flush with the outer surface of the guide 59 so that the tape is close to the paper and is guided as not to be fouled by the die.
  • the guide 116 is fixed to the floor of the slot 100 by a fixing screw (not shown) .
  • a hollow shaft 91 which carries the conical cams 90, 90a and 90b. Each cam actuates a respective die or dies by engagement with the face 88 of the respective plunger.
  • the shaft 91 is mounted for rotation on bearings 92, 92a and can be moved axially by means of a spigot 93 which is operable by a pneumatic assembly 94 of any suitable form.
  • the assembly 94 may be deactuated to allow the dies to retract when cylinder rotation stops, because heated dies need to be retracted when the cylinder is not rotating to prevent heated dies being in continuous pressurized contact with the web or the impression belt.
  • Heat for the dies may be provided by electrical heaters 95 each clamped to one of the conical cams, as shown for cam 90, the heaters being supplied with electrical current by way of slip rings (not shown) .

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Replacement Of Web Rolls (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Coating Apparatus (AREA)
  • Printing Methods (AREA)

Abstract

Appareil pour transférer une feuille depuis un ruban de support (48) vers une bande circulante (2) composée d'un cylindre rotatif (17) doté d'au moins une matrice (51). On fait passer la bande à travers et autour du cylindre. Un mécanisme de transfert (42, 49) capable de rotation synchronisée avec le cylindre indexe le ruban, en général dans le sens de la longueur par rapport au cylindre et sur la position de la matrice. Le ruban va-et-vient le long d'un guide (59) dans le cylindre. Lorsqu'il passe sur la position de la matrice, un rouleau ou tambour presse la bande contre le ruban et la matrice.
EP90907339A 1989-05-27 1990-05-16 Machine et methode pour imprimer une feuille detachable sur une bande circulante Expired - Lifetime EP0473635B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8912269 1989-05-27
GB8912269A GB2232380B (en) 1989-05-27 1989-05-27 Machine and method for impressing releasable foil on to a moving web
PCT/GB1990/000759 WO1990014953A1 (fr) 1989-05-27 1990-05-16 Machine et methode pour imprimer une feuille detachable sur une bande circulante

Publications (3)

Publication Number Publication Date
EP0473635A1 true EP0473635A1 (fr) 1992-03-11
EP0473635B1 EP0473635B1 (fr) 1994-07-06
EP0473635B2 EP0473635B2 (fr) 1997-02-26

Family

ID=10657492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907339A Expired - Lifetime EP0473635B2 (fr) 1989-05-27 1990-05-16 Machine et methode pour imprimer une feuille detachable sur une bande circulante

Country Status (11)

Country Link
EP (1) EP0473635B2 (fr)
JP (1) JP2795536B2 (fr)
AT (1) ATE108133T1 (fr)
AU (2) AU5654190A (fr)
CA (1) CA2045411C (fr)
DE (1) DE69010496T3 (fr)
DK (1) DK0473635T3 (fr)
FI (1) FI97871C (fr)
GB (1) GB2232380B (fr)
NO (1) NO913160D0 (fr)
WO (2) WO1990014953A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2276350B (en) * 1993-03-26 1996-05-08 Falcontec Ltd Rotary blocking die
ATE152411T1 (de) * 1993-05-17 1997-05-15 De La Rue Giori Sa Vorrichtung zum auftragen von bildern in einer sicherheitsdruckmaschine
US5662986A (en) * 1996-07-09 1997-09-02 Hampshire Holographic Manufacturing, Corp. Holographically transferable images
EP1314554A1 (fr) * 2001-11-23 2003-05-28 Kba-Giori S.A. Dispositif de décollage d'éléments de sécurité
EP1588865A1 (fr) * 2004-04-22 2005-10-26 Kba-Giori S.A. Cylindre de gaufrage
CN109835561B (zh) * 2019-01-22 2024-03-26 无锡鼎昌包装科技有限公司 热压组件

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181456A (en) * 1961-08-24 1965-05-04 Pannier Corp Flexographic rotary printing cylinder with retractable dies
GB1130210A (en) * 1966-10-06 1968-10-09 Apicella Anthony Printing and stamping press
US3584572A (en) * 1968-02-19 1971-06-15 Anthony Apicella Method, apparatus and die adapted to simultaneously heat stamp, emboss and cut
FR2045626A1 (fr) * 1969-06-13 1971-03-05 Jerome Andre
US4231290A (en) * 1978-10-30 1980-11-04 Norwood Marking & Equipment Co. Multiple head marking device
US4516493A (en) * 1983-02-10 1985-05-14 Harold Schemenauer Apparatus for imprinting and cutting a tape or ribbon
JPS6029353A (ja) * 1983-07-27 1985-02-14 Hashimoto Forming Co Ltd 合成樹脂製モ−ルデイングの取付構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9014953A1 *

Also Published As

Publication number Publication date
EP0473635B2 (fr) 1997-02-26
NO913160L (no) 1991-08-13
FI914054A0 (fi) 1991-08-28
GB8912269D0 (en) 1989-07-12
AU5652090A (en) 1991-01-07
FI97871B (fi) 1996-11-29
DE69010496T3 (de) 1997-05-07
GB2232380B (en) 1992-08-19
DE69010496T2 (de) 1994-10-27
ATE108133T1 (de) 1994-07-15
CA2045411A1 (fr) 1990-11-28
DE69010496D1 (de) 1994-08-11
NO913160D0 (no) 1991-08-13
WO1990014954A1 (fr) 1990-12-13
AU622328B2 (en) 1992-04-02
FI97871C (fi) 1997-03-10
CA2045411C (fr) 1996-12-03
WO1990014953A1 (fr) 1990-12-13
EP0473635B1 (fr) 1994-07-06
JPH04507225A (ja) 1992-12-17
GB2232380A (en) 1990-12-12
AU5654190A (en) 1991-01-07
DK0473635T3 (da) 1994-08-01
JP2795536B2 (ja) 1998-09-10

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