EP1775135A1 - Drucker - Google Patents

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Publication number
EP1775135A1
EP1775135A1 EP05292186A EP05292186A EP1775135A1 EP 1775135 A1 EP1775135 A1 EP 1775135A1 EP 05292186 A EP05292186 A EP 05292186A EP 05292186 A EP05292186 A EP 05292186A EP 1775135 A1 EP1775135 A1 EP 1775135A1
Authority
EP
European Patent Office
Prior art keywords
image receiver
film element
printing
transport
film
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.)
Withdrawn
Application number
EP05292186A
Other languages
English (en)
French (fr)
Inventor
Klaus Hense
Karl Hanisch
Johann Veigl
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.)
Sagem SA
Original Assignee
Sagem SA
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
Application filed by Sagem SA filed Critical Sagem SA
Priority to DE2005292186 priority Critical patent/DE05292186T1/de
Priority to EP05292186A priority patent/EP1775135A1/de
Publication of EP1775135A1 publication Critical patent/EP1775135A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet

Definitions

  • the invention relates to a printing apparatus for transferring toner from a toner-bearing film element to an image receiver to be printed by locally heating the film element, with film transport means being provided for transporting the film element relative to the image receiver along a first direction of transport, and with image receiver transport means being provided for transporting the image receiver relative to the film element along a second direction of transport.
  • Thermal printers are known in which a film comprising a toner is guided close to a surface area to be printed and is heated locally in the regions or pixels which are to be printed. As a result, the solid toner on the film is molten or sublimed. The same therefore changes directly from the solid into the gaseous aggregate state and is transferred to the surface area to be printed. Thermal resistance elements can be provided for heating the film.
  • the thermal resistance elements are fixedly arranged in the printers, it is necessary to move the surface area to be printed, which is therefore usually the paper.
  • the surface area to be printed is therefore guided on a transport roller. It is provided for in such printers that in a first printing process the components of a color are applied to the entire surface to be printed. Thereafter, the surface area to be printed is returned to the starting position and a further color component is applied. Three or four color components are thus typically applied.
  • the film with the toner comprises several successive regions with toner of the color to be printed in such embodiments and is moved forward in a respective fashion when a new color is to be printed.
  • the film is pressed as so-called endless material with successive regions of differently colored toner by a press roller against the surface to be printed, with the film having the width of the surface area to be printed and the axes of the transport roller and the press roller being substantially parallel.
  • the disadvantageous aspect in such a printer is that the surface area to be printed needs to be newly positioned after the application of each color and the positioning of the surface area to be printed needs to be made with a substantially higher precision than the print resolution to be achieved, because it is necessary for the sharp reproduction of individual color pixels that the successively applied coloring pigments need to be applied at the predetermined position of the surface area to be printed.
  • first transport direction is arranged substantially normal relative to the second transport direction.
  • a strip-like film element is provided. It is thus possible to print an area which is large relative to a single line, whereas the area in which the film is heated and thus the area in which a thermal unit needs to be positioned can be kept small.
  • film transport means comprise at least one unreeling apparatus and a reeling apparatus. This enables a simple feed of the film.
  • a separation apparatus is provided for separating the film element from the image receiver. This ensures maintaining an even distance of the film from the image receiver, as a result of which the print resolution can be kept constant.
  • the separation apparatus comprises a rail element movable over the width of the image receiver.
  • a variant of the invention can be that the separation apparatus comprises at least two rail elements delimiting a current printing area. The film is thus guided in an especially stable manner.
  • At least one laser writing unit for locally heating the film element is provided, especially in the region of the image receiver.
  • a predeterminable area or a pixel can thus be heated in a simple and precise manner.
  • the heat source can be positioned simply and can be focused precisely.
  • the printing speed can be increased substantially by several laser writing units.
  • At least one laser writing unit for local heating of the film element, especially in the region of the image receiver, is provided for each color and/or layer intended for printing.
  • the printing speed can thus be increased in addition, because several colors can be applied in parallel.
  • the invention further relates to a printer with a printing apparatus in accordance with the invention.
  • a printer with a printing apparatus in accordance with the invention.
  • the invention further relates to a method for printing an image receiver, especially for a printing apparatus in accordance with the invention and/or a printer in accordance with the invention, with toner being transferred from a film element by local heating to a printing area of the image receiver which is opposite of the film element.
  • the image receiver By transporting the film element substantially normal to the image receiver, the image receiver can be printed with all provided colors in a region of the width of the film element. Merely the heating of the individual regions or pixels of the film element must have the printing precision, which is necessary anyway for achieving a printing precision. As a result of the width of the film element, it is possible to print not only a line but a strip complete in all colors. The image receiver must merely be moved forward by the width of the film element or by the width of the portion of the image applied to the image receiver. Printing precision is then merely required for this purpose. Complex repositioning of the area to be printed is no longer necessary.
  • the image receiver is moved forward along the second transport direction by a printing width of the film element.
  • An image can thus be printed broken down into partial images substantially independent from its size.
  • Figs. 1 to 4 show simplified representations or parts of a printing apparatus for transferring toner 9 from a toner-bearing film element 1 to an image receiver 4 to be printed by local heating of the film element 1, with film transport means 2 being provided for transporting the film element 1 relative to the image receiver 4 along a first transport direction 3, and with image receiver transport means 5 being provided for transporting the image receiver 4 relative to the film element 1 along a second transport direction 6, with the first transport direction 3 being arranged substantially normal to the second transport direction 6.
  • the image receiver 4 can be printed in all provided colors in a region of the width of the film element 1. Merely the heating of the individual regions or pixels of the film element 1 must have the printing precision, which is necessary anyway for achieving a predeterminable printing precision.
  • the width of the film element 1 allows printing not only a line but a strip complete in all colors.
  • the image receiver 4 then only needs to be forwarded by the width of the film element 1 or by the width of the part of the image applied to the image receiver 4, with the printing precision being sufficient alone for this purpose. A complex repositioning of the surface area to be printed is thus no longer necessary.
  • the printing apparatuses in accordance with the invention can concern a printing apparatus for use in any kind of printer and/or printing machine such as compact printers, office printers, special photographic printers and/or large-scale printing installations.
  • the printing apparatuses in accordance with the invention are provided for printing an image receiver 4.
  • This can concern any type of material which is temporarily substantially solid such as paper, cardboard, metal, fabric, wood, plastic, composite materials, rubber, glass, solidified and/or frozen liquids, or a combination of the same, or other materials.
  • an image of a picture is provided for in an image receiver 4 in a printing apparatus in accordance with the invention. This may concern both "images" as well as text.
  • the image is produced on the image receiver 4 by application of toner 9, with the toner 9 being thermally detached from a toner-bearing film element 1 and being deposited on an image receiver 4.
  • a region of the film element 1 overlaps a region of the image receiver 4.
  • An image can be produced on the image receiver 4 in this region of temporary overlapping, which is why this region is designated as the printing area or as the current printing area.
  • a film element 1 for a printing apparatus in accordance with the invention comprises a carrier layer 14 and a toner layer 15. It is also possible that several layers are provided.
  • a printing apparatus in accordance with the invention further comprises an image receiver transport means 5 for transporting the image receiver 4. Since an application of the image may not be possible, or only within certain limits, in a single printing process in most of the cases, it may be provided that the image receiver is movable relative to the printing area. As a result of the image receiver transport means 5, a transport of the image receiver 4 relative to the film element 1 is possible or provided along a second transport direction 6.
  • the image receiver transport means 5 can comprise any kind of means for the movement of an image receiver 4, especially any kind of roller and/or linear guide means.
  • the image receiver means 5 comprise a substantially planar receiving table 16, on which the image receiver 4 is held.
  • Means (not shown) for fixing the image receiver 4 on the receiving table 16 can be provided such as clamps and/or a vacuum suction system.
  • the receiving table 16 and/or the image receiver 4 can be moved with means (not shown) at least in the entered second transport direction 6.
  • a movement or adjustment of the receiving table 16 and/or the image receiver 4 can also be provided in other directions, e.g. perpendicular and/or horizontal substantially normal to the second transport direction 6.
  • an image receiver support which is roller-shaped at least in sections, with the radius of the roller or roller section preferably being so large that the same is negligible in the current printing area. It can also be provided that the film element 1 is deformed in an arc-shaped manner in the printing area, so that the same is parallel to the surface of the image receiver 4 in the printing area and has a substantially equal distance to the surface of the image receiver 4 at each point of the film element 1.
  • An image receiver 4 which is roller-shaped in sections comes with the advantage that the same can be swivelled about an axis, which thus leads to an especially simple manner of the transport of the image receiver 4 along the second transport direction 6.
  • Printing apparatuses in accordance with the invention are provided for use with toner-bearing film elements 1. During the printing process, the toner 9 is detached from the film element 1, thus leading to toner-free regions on the film element 1.
  • Film transport means 2 for transporting the film element 1 relative to the image receiver 4 along a first transport direction 3 are provided in a printing apparatus in accordance with the invention in order to provide regions of the film element 1 with toner 9 during the printing process. It is provided for in accordance with the invention that the first transport direction 3 is arranged substantially normal to the second transport direction 6, which thus leads to the advantages as already described above.
  • the same comprise at least one unreeling apparatus 7 and a reeling apparatus 8, which thus allows using a film element 1 in the form of so-called "endless material".
  • an unreeling apparatus 7 can comprise a reel which is rotatably held about an axis.
  • a reeling apparatus 8 can also comprise a rotatably held reel. It can be provided in particular that the reel of the reeling apparatus 8 can be driven in a predeterminable manner.
  • the control unit of the reeling apparatus 8 can be part of the control unit of the printing process and/or can cooperate with the same. It can also be provided that the unreeling apparatus 7 is driven in order to prevent excessive tensile stresses in the film element 1 and thus to avoid any stretching or tearing of the same.
  • a separation apparatus 11 is provided for separating the film element 1 from the image receiver 4.
  • Such a separation apparatus 11 can comprise a rail element 12 which is movable approximately over a width of the image receiver 4. It is provided in an especially preferable way that the separation apparatus 11 comprises at least two rail elements 12 delimiting a current printing area.
  • Fig. 4 shows two rail element 12 which guide a film element 1 which is strip-like in this preferred embodiment and ensure a constant distance to the image receiver 4.
  • an elevation such as a web or a number of knob-like elevations which are arranged directly on the film element 1, which webs or knob-like elevations border the film element 1 on either side. It can preferably be provided that the distance of the film element 1 relative to the image receiver 4 is approx. 3 ⁇ m to 50 ⁇ m.
  • a local heating of the film element 1 is provided for transferring the toner 9 from the film element 1 to the image receiver 4. Any kind of heat source can be provided for reaching this local heating. Thermal resistor elements can be provided for this purpose. It can preferably be provided that at least one laser writing unit 10 is provided for locally heating the film element 1, especially in the region of the image receiver 4.
  • Fig. 2 shows a film element 1 adjacent to an image receiver 4 as well as a laser writing unit 10. The broad illustrated arrow 13 symbolizes the energy flow from the laser writing unit 10 to the film element 1.
  • the toner 9 extracted from the toner layer 15 under the influence of energy, which toner was transferred to the surface of the image receiver 4. It is also possible to provide a heating of the film element 1 through the image receiver 4.
  • Fig. 3 shows a schematic representation of a preferred embodiment of a printing apparatus in accordance with the invention with a laser writing unit 10.
  • the energy flow from the laser writing unit 10 to the film element 1 is also illustrated by the broad arrow 13.
  • Such a laser writing unit 10 can be provided for moving or adjusting and focussing over a wide area, especially the entire printing area. The possible mobility and adjustability is symbolized by the illustrated arrows 17. It is also possible that several laser writing units 10 are provided.
  • the printing area can also be divided into partial areas which are each allocated to at least one laser writing unit 10.
  • the laser writing units 10 must be adjusted or focussed with the print resolution or precision.
  • a film element 1 which comprises regions of differently colored toner 9.
  • a printing area is printed with toner 9 of a first color when the image receiver 4 is stationary, thereafter the film element 1 is moved further along a first transport direction 3 until a region of a second toner 9 of a different color comes to lie above the printing area and the printing process is carried out for this second color component. This is repeated until all color components have been used up.
  • a layer which is substantially transparent and/or is provided all over.
  • toner 9 of the colors cyan, magenta, yellow and/or black are provided.
  • the toner 9 could be provided with any other color such as fluorescent or ultraviolet colors.
  • the film element 1 is moved further in the first transport direction 3 until a region of the next desired toner 9 is arranged opposite of the printing area, and the image receiver 4 is moved further along the second transport direction 6 by a printing width of the film element 1, with the first transport direction 3 being arranged substantially normal to the second transport direction 6.
  • a printing area can thus be achieved with advantageous width without any movement of the image receiver 4 and with minor movements or adjustments of the thermal writing unit.

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EP05292186A 2005-10-17 2005-10-17 Drucker Withdrawn EP1775135A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2005292186 DE05292186T1 (de) 2005-10-17 2005-10-17 Drucker
EP05292186A EP1775135A1 (de) 2005-10-17 2005-10-17 Drucker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05292186A EP1775135A1 (de) 2005-10-17 2005-10-17 Drucker

Publications (1)

Publication Number Publication Date
EP1775135A1 true EP1775135A1 (de) 2007-04-18

Family

ID=35985882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05292186A Withdrawn EP1775135A1 (de) 2005-10-17 2005-10-17 Drucker

Country Status (2)

Country Link
EP (1) EP1775135A1 (de)
DE (1) DE05292186T1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051694A1 (de) * 1980-11-12 1982-05-19 Ibm Deutschland Gmbh Vorrichtung zum Führen eines in Längsrichtung fortbewegten Bandes
JPS59152886A (ja) * 1983-02-21 1984-08-31 Matsushita Electric Ind Co Ltd 熱転写型シリアルプリンタ
JPS6127269A (ja) * 1984-07-18 1986-02-06 Konishiroku Photo Ind Co Ltd 熱転写プリンタ
JPS61135770A (ja) * 1984-12-07 1986-06-23 Fuji Xerox Co Ltd 多色転写型感熱記録装置
US4773779A (en) * 1985-12-11 1988-09-27 International Business Machines Corporation Printer ribbon cartridge with flexible ribbon guides and integral ribbon shield
US6304281B1 (en) * 1998-03-13 2001-10-16 Man Roland Druckmaschinen Ag Process and device for providing thermal transfer material for thermal transfer image generation
EP1260376A2 (de) * 2001-05-23 2002-11-27 Isermatic Systemes Thermotransferfarbdruckverfahren und -vorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051694A1 (de) * 1980-11-12 1982-05-19 Ibm Deutschland Gmbh Vorrichtung zum Führen eines in Längsrichtung fortbewegten Bandes
JPS59152886A (ja) * 1983-02-21 1984-08-31 Matsushita Electric Ind Co Ltd 熱転写型シリアルプリンタ
JPS6127269A (ja) * 1984-07-18 1986-02-06 Konishiroku Photo Ind Co Ltd 熱転写プリンタ
JPS61135770A (ja) * 1984-12-07 1986-06-23 Fuji Xerox Co Ltd 多色転写型感熱記録装置
US4773779A (en) * 1985-12-11 1988-09-27 International Business Machines Corporation Printer ribbon cartridge with flexible ribbon guides and integral ribbon shield
US6304281B1 (en) * 1998-03-13 2001-10-16 Man Roland Druckmaschinen Ag Process and device for providing thermal transfer material for thermal transfer image generation
EP1260376A2 (de) * 2001-05-23 2002-11-27 Isermatic Systemes Thermotransferfarbdruckverfahren und -vorrichtung

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 284 (M - 348) 26 December 1984 (1984-12-26) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 176 (M - 491) 20 June 1986 (1986-06-20) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 331 (M - 533) 11 November 1986 (1986-11-11) *

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Publication number Publication date
DE05292186T1 (de) 2007-10-18

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