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"
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
  • B65C9/00—Details of labelling machines or apparatus
  • B65C9/08—Label feeding
  • B65C9/18—Label feeding from strips, e.g. from rolls
  • B65C9/1865—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip
  • B65C9/1869—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip and being transferred directly from the backing strip onto the article
  • B65C9/1873—Label feeding from strips, e.g. from rolls the labels adhering on a backing strip and being transferred directly from the backing strip onto the article the transfer involving heating means, e.g. for decals
• • 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

• the present invention relates to a device for separating a tape carrying security elements and a sheet on which said security elements have been applied, said device comprising means for removing the tape from the sheet.
• the present invention also relates to a machine comprising at least one such separation device.
• control elements are well known and mainly used to prevent counterfeiting of securities, in particular the copying of banknotes.
• control elements commonly called security elements
• security elements in the papers -printed values in addition to the particular means already used, such as for example watermarks in paper or particular printing techniques.
• Publication EP 0 768 189 the content of which is incorporated by reference into the present application, finally shows a document, such as security paper, comprising a film-shaped security element which is permanently attached to said document and which does not cannot be modified or removed without being damaged.
• a crucial step in the process of applying such images to prints is that of taking off the image of the ribbon which carries it, when said ribbon is removed from the sheet containing the impressions. .
• the applied images are very fine so that it is not possible to modify or remove it without damaging it irreparably, it is necessary, on the one hand, that the collage is perfect and, on the other hand, that when removing the support from the images, generally a ribbon, said images are not damaged.
• the solution which is known at present is to use a system which presses the tape against the sheet on which the image is applied after the application rolls and the tape-sheet separation occurs immediately after this compression.
• This device notably comprises a pressure element with an inclined plane whose thinnest end presses the tape against the sheet, and then the tape is peeled off in a direction approximately perpendicular to the surface of the sheet.
• the first risk involved is that of the ribbon breaking. Such a break is very annoying because, as often the tape is used continuously to iron several times in the machine, we will waste time resetting the machine and we will also lose lengths of tape with images , which is very expensive.
• the object of the invention is to improve the known systems by overcoming the drawbacks of these.
• the object of the invention is to propose a simple take-off system, of reduced maintenance, and the adjustment of which is rapid.
• the invention is characterized in that the take-off means comprise at least one take-off roller along which the strip passes approximately perpendicular to the surface of the sheet.
• the take-off means comprise at least one take-off roller along which the strip passes approximately perpendicular to the surface of the sheet.
• the invention also goes against a technical prejudice: indeed, it has always been believed that a compression of the ribbon against the sheet was essential to perfect the transfer of the image on the sheet. Thus, empirical adjustments were always made to ensure a certain compression without pressing too much to avoid breaking the ribbon and generating too much dust. In addition, the system had to be regularly adjusted to compensate for the wear of the inclined plane.
• Figure 1 shows schematically a printing machine performing the application of security elements on sheets.
• FIG. 2 shows a take-off device known in the state of the art
• FIG. 3 shows a take-off device according to the invention
• FIG. 1 A printing machine allowing the application of security elements according to the invention is shown diagrammatically in FIG. 1.
• a feeder 1 mounted upstream of a sheet processing machine is provided with a sheet transport system 2, which leads to a sheet feeding installation 3.
• the sheet feeding installation 3 comprises, for example, a first suction drum 4 and a transfer drum 5. Downstream of this drum 5 is provided a plurality of rollers 6 for guiding the sheets on the transfer drum 5. These sheet guide rollers 6 are arranged with their axes parallel to the transfer drum 5.
• a second transfer drum 7 feeds the sheets to a processing cylinder 8 of the processing machine.
• the treatment cylinder 8 is provided with four retainer 9, for example suction strips, extending axially and uniformly distributed around the circumference.
• These suction bands are controlled in a controlled manner with vacuum air or pressurized air by means of a rotary introduction device.
• Downstream of the treatment cylinder 8 is disposed guide roller 10 of a conveyor belt system 11.
• Around this guide roller 10 is guided a plurality of conveyor belts 11 juxtaposed in the axial direction.
• These conveyor belts 11 lead, from this guide roller 10, to a cooling roller 12 and surround the latter at a predetermined angle, and a roller additional guide 13 is arranged after the cooling roller 12.
• the conveyor belts 11 surround the guide roller 13 at a predetermined angle and reach a third guide roller 14 in an approximately horizontal direction.
• this third guide roller 14 is arranged, below the conveyor belts 11 and between the conveyor belts 11, a suction drum 15 whose peripheral surface is tangent to the plane of transport of the sheets 16 in this zone.
• This suction drum 15 can also be arranged immediately after the conveyor belts 11.
• An outlet 17 known per se is connected to the conveyor belts 11.
• This outlet 17 is provided with a rotary chain conveyor, on the two chains 18 of which is fixed a plurality of gripping systems 19.
• the processing machine is produced in the form of a ribbon stamping machine and the processing cylinder is here a stamping cylinder 8.
• the cylinder stamping 8 is in the present example provided with hot stamps on its peripheral surface which are electrically heated.
• the supply of energy to the hot stamps on the stamping cylinder 8 takes place, for example, by means of transformers.
• a device which has not been shown in more detail, intended for supplying and removing an endless support strip 20, for example hot stamping tape.
• the support tape 20 is brought to the stamping cylinder 8 by means of an unwinding station 21 and is guided with the sheets 23 all around the stamping cylinder 8.
• the support tape 20 is guided to the first roll guide 10 of the conveyor belts 11 and from there, together with the conveyor belts 11, around the cooling roller 12 to the second guide roller 13 of the belts conveyors 11. After this second guide roller 13 is arranged a tape peeling device 20.
• the support tape 20 is brought to a winding station 22.
• a plurality of contact rollers 23 cooperating with the stamping cylinder 8 are arranged on the stamping cylinder 8.
• two rows of axially extending contact rollers 23 are pressed elastically by means of pneumatic cylinders 24 against the stamping cylinder 8.
• FIG. 2 shows in detail a tape peeling device known in the prior art.
• the sheet 16 and the ribbon 20 are transported together on the strips 11 around the roller 13 and arrive in the release device itself.
• a pressure element 25 is used comprising an inclined plane, the tip 26 of which exerts pressure on the ribbon 20 and the sheet 16 at point P.
• the ribbon 20 is separated from the sheet. 16 by detachment, passes tangentially along a roller 27 and continues to the winding station 22 ( Figure 1).
• the sheet it is transported by the strips 11 in the outlet of the machine.
• FIG. 3 shows in detail an embodiment of the release device according to the invention. According to this mode, the identical elements are identified by the same reference numerals.
• the sheet 16 and the tape 20 are moved by the conveyor belts 11 and arrive in the take-off device.
• the pressure element 25 is replaced by a take-off roller 28 mounted on an axis 29 parallel to the axis of the roller 13.
• the take-off roller 28 is in this case not in contact with the sheet 16 and does not exert pressure between said sheet and the ribbon 20, unlike the pressure element 25 in FIG. 2.
• the distance between the take-off roller 28 and the sheet 16 is preferably between 5 and 10 mm.
• the take-off roller 28 is mounted to rotate freely on an axis 29.

Landscapes

• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
• Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
• Delivering By Means Of Belts And Rollers (AREA)
• Inking, Control Or Cleaning Of Printing Machines (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Printing Methods (AREA)
• Labeling Devices (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Credit Cards Or The Like (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8184260

Family Applications (1)

Country Status (10)

Cited By (8)

Families Citing this family (20)

Citations (8)

Family Cites Families (18)

• 2001
  • 2001-11-23 EP EP01811129A patent/EP1314554A1/fr not_active Withdrawn
• 2002
  • 2002-11-19 CN CNB028231724A patent/CN100396484C/zh not_active Expired - Fee Related
  • 2002-11-19 CA CA002467109A patent/CA2467109A1/fr not_active Abandoned
  • 2002-11-19 KR KR1020047007551A patent/KR20050044516A/ko not_active Ceased
  • 2002-11-19 JP JP2003545480A patent/JP2005526671A/ja active Pending
  • 2002-11-19 WO PCT/IB2002/004821 patent/WO2003043823A1/fr not_active Ceased
  • 2002-11-19 AT AT02783388T patent/ATE316867T1/de not_active IP Right Cessation
  • 2002-11-19 RU RU2004118837/12A patent/RU2288103C2/ru not_active IP Right Cessation
  • 2002-11-19 EP EP02783388A patent/EP1446291B1/fr not_active Expired - Lifetime
  • 2002-11-19 DE DE60209034T patent/DE60209034T2/de not_active Expired - Lifetime
  • 2002-11-19 US US10/496,061 patent/US20050166771A1/en not_active Abandoned

Patent Citations (8)

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