EP0182011A2 - Procédé, dispositif et feutre de couleur pour la régénération de rubans encreurs à chaleur - Google Patents

Procédé, dispositif et feutre de couleur pour la régénération de rubans encreurs à chaleur Download PDF

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Publication number
EP0182011A2
EP0182011A2 EP85110258A EP85110258A EP0182011A2 EP 0182011 A2 EP0182011 A2 EP 0182011A2 EP 85110258 A EP85110258 A EP 85110258A EP 85110258 A EP85110258 A EP 85110258A EP 0182011 A2 EP0182011 A2 EP 0182011A2
Authority
EP
European Patent Office
Prior art keywords
thermal
heating plate
ribbon
doctor
ink
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Withdrawn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
EP85110258A
Other languages
German (de)
English (en)
Other versions
EP0182011A3 (fr
Inventor
Heinrich Krauter
Albert Schmedes
Franz Peters
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.)
Pelikan International Corp Bhd
Original Assignee
Pelikan GmbH
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 Pelikan GmbH filed Critical Pelikan GmbH
Publication of EP0182011A2 publication Critical patent/EP0182011A2/fr
Publication of EP0182011A3 publication Critical patent/EP0182011A3/fr
Withdrawn legal-status Critical Current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
    • B41J31/00—Ink ribbons; Renovating or testing ink ribbons
    • B41J31/14—Renovating or testing ink ribbons

Definitions

  • the invention relates to a method, a device and a colored pencil for the regeneration of thermal ribbons with partially depreciated melting ink.
  • Thermal ribbons are known. They have a melting color, in particular in the form of a wax-bound dye or soot layer, on a film-like carrier, which can consist of paper, plastic and the like. This melting ink is melted in a thermal ribbon using a thermal print head and transferred to a printing paper.
  • Thermal printers or thermal print heads that are used for this process are e.g. B. from DE-ASen 2 062 494 and 2 406 613 and DE-OS 3 224 445 known.
  • z. Example proceed as follows: In a printing roller made of soft rubber, the thermal print head is pressed onto a tape recording paper and a thermal ink ribbon of the type described above by means of a spring and thus a thermal symbol is embossed.
  • thermal ribbons described above are relatively expensive. This applies to the manufacture as well as to the material, particularly in the form of the carrier material.
  • the particulate material should preferably be a metal oxide, a metal, an organic resin or carbon black. It is said to be finely powdered and to give the ink layer a porous, spongy structure which allows only a small amount of the molten ink material to be transferred to be consumed in each individual printing operation.
  • European Patent Specification 0 071 404 is also concerned with a reusable thermal ink ribbon, in which an already applied layer of the melting ink softens in the course of production and the combination of ink layer / carrier is calendered with simultaneous heating. As a result, the carrier is at least partially impregnated with the melting paint.
  • the carrier appears to be preferably paper.
  • the invention was therefore based on the object of developing a method, a device and a colored pencil therefor, by means of which thermal ribbons can be regenerated inexpensively, simply and with sufficient quality with regard to multiple use.
  • this object is achieved by a method for regenerating a thermal ink ribbon with partially depreciated melting ink in that the thermal ink ribbon is melted over a heating plate for melting the remaining melting ink and smoothed in the melted state.
  • the invention further relates to a device for regenerating the coating of a thermal ink ribbon of the above type, which is characterized by a heating plate, a ribbon guide guiding the thermal ink ribbon over the heating plate and at least one pre-squeegee pressing the thermal ink ribbon against the heating plate.
  • a color pen of a fusible or which is in its composition of the melt color of the T hermofarbbandes equal to their corresponding substantially.
  • a thermal ink ribbon can already be sufficiently regenerated by passing it over a hot plate and pressing it so that the remaining melting ink remaining after the writing process is melted and smoothed. That is, the hermofarbband on the T after the Druchlauf by the writing apparatus remaining residual color layer is evenly distributed, so that the originally present vacant positions are fixed. It's surprising that the color layer after the regeneration according to the invention is sufficient for a satisfactory writing quality with further use.
  • thermo ink ribbon is pressed against the heating plate by a doctor blade. Furthermore, it is expedient if the thermal ink ribbon is additionally processed by means of a doctor blade, since this enables a particularly uniform formation of the smoothed coating of the melting ink to be achieved.
  • the method according to the invention achieves optimal results if the heating plate is heated to a temperature between 50 and 200 ° C.
  • the particularly advantageous heating temperature naturally depends on the melting point of the melting ink, which in turn depends on that of the binder.
  • This binder is generally a wax or a wax-like material.
  • wax is to be understood as far as possible. Such material should generally have the following characteristics: At 20 ° C not kneadable, solid to brittle-hard, coarse to finely crystalline, transparent to opaque, but not vitreous, meltable than 40 O C. without decomposition, but only slightly above Melting point relatively low-viscosity and not stringy.
  • “Wax-like materials” are substances that resemble the waxes of the characteristic properties mentioned above.
  • the melting ink is at least partially detached from the plastic film at the desired location and transferred to the recording paper.
  • the transferred melting ink solidifies quickly and forms a largely sharp print.
  • the colors or dyes contained in the wax of the melting ink chosen in each case can be in particular: carbon black, colored pigments, in particular lightfast pigments, and dyes soluble in wax, in particular dyes with good solubility and high lightfastness.
  • a cooling of the heated layer of the melting ink provided immediately after passing through the heating plate leads, according to a further advantageous embodiment of the invention, to a qualitatively satisfactory coating.
  • thermal ribbons can be regenerated about 2 to 3 times.
  • the amount of paint available afterwards is generally no longer sufficient for a perfect coating.
  • thermal ribbons can be coated as often as desired if, according to a particularly advantageous development of the invention, a colored pencil is pressed against the thermal ribbon guided over the heating plate.
  • this colored pencil is matched to that of the melting ink of the thermal ink ribbon, ie it is identical to it or largely corresponds to it.
  • it can be recommended that its melting point is somewhat lower than that of the melting color of the thermal ribbon. Melting takes place at the point where the colored pencil is printed on the thermal ribbon.
  • the colored pencil melts at least somewhat and dispenses the melted paint onto the thermal ink ribbon, so that the loss of melting paint caused by the writing process is compensated for.
  • the thermal ribbon can therefore be used as often as you like be regenerated so that the relatively expensive substrate is used optimally.
  • the desired layer thickness of the melting ink on the thermal ink ribbon can be influenced in the desired manner by regulating the temperature of the heating plate, by selecting the contact pressure of the colored pencil and by selecting the speed at which the ribbon is drawn over the heating plate. The required surface quality is achieved by processing with the above-mentioned doctor blade.
  • the heating plate has a guide groove which is adapted in width to the thermal ink ribbon, since the ribbon can thereby be guided reliably during processing.
  • the pre-doctor blade and / or post-doctor blade are either knife-like or designed as a smoothing roll. It is particularly advantageous if the post doctor blade is wound with an electrical resistance heater or is itself designed as a resistor.
  • the device for regenerating the thermal ink ribbon can be implemented as a separate unit either in the writing apparatus (printer or typewriter) or outside the writing apparatus.
  • the heating plate is mounted so as to be displaceable in the direction of the doctor blades.
  • the writing tape can be continuously fed through the regeneration device.
  • this is put out of operation during the writing operation in that the squeegees move away from the heating plate and the thermal ink ribbon is thus not processed and through the regeneration device is affected. Only when the thermal ink ribbon is rewound are the doctor blades moved against the heating plate or the heating plate against the doctor blades, so that the regeneration device is put into operation.
  • a colored pencil can achieve satisfactory results if it contains the following waxes or wax-like substances: paraffin, silicones, natural wax, in particular carnauba wax, beeswax, ozokerite and paraffin wax, synthetic wax, in particular acid waxes, ester waxes, partially esterified ester waxes and polyethylene waxes, glycols or polyglycols and / or surfactants, such as.
  • the colored pencil according to the invention is particularly suitable for carrying out the method according to the invention and for use in the device according to the invention. Since it melts easily due to the heat supplied by the heating plate and thus transfers a so-called "hot-melt" layer to the continuous thermal ink ribbon, either for its regeneration or for its new coating. It has been shown that a colored pencil with a cross-sectional area of 8 x 200 mm and a pencil length of 3 cm is sufficient for coating a thermal ribbon with a width of 8 mm and a length of 200 m for approx. 10 secondary coatings. Its heat of fusion is preferably 50-250 j / g, very particularly preferably 80-150 j / g.
  • the melting point is preferably 50-200 ° C, very particularly preferably 60-100 ° C.
  • the specific heat is preferably about 1-3 j / g grad very particularly preferably 1.5-2.5, the viscosity at 100 ° C., in particular about 60-120 mPas.
  • the use of colored pencils with a round or triangular cross-sectional area is of course also possible.
  • the melting color of the colored pencil should be homogeneous and free of bubbles.
  • the pigment particles contained therein are predominantly smaller than 1 ⁇ m, but at most 10 ⁇ m
  • the device shown in FIG. 1 has a heating plate 1, which is heated to a temperature between 50 and 200 ° C. via a resistance heater, not shown is heatable.
  • the heating plate 1 is provided with a guide groove which extends parallel to the plane of the drawing.
  • the guide groove is interrupted at the points of the squeegee and the colored pencil.
  • two smoothing rollers 5 and 6 acting as doctor blades are rotatably mounted.
  • the axes of the smoothing rollers 5 and 6 are perpendicular to the plane of the drawing.
  • the smoothing rollers are wider than the guide groove.
  • the smoothing rollers 5 and 6 are movably mounted and biased towards the heating plate 1 by a mechanism, not shown.
  • a colored pencil 3 is arranged between the two smoothing rollers 5 and 6 above the interrupted guide groove.
  • the colored pencil 3 is guided through a guide 2 which surrounds it in a form-fitting manner.
  • a tracking device 4 is arranged, which is driven by an electric motor (not shown) with a constantly adjustable torque. Through the tracking device 4, the colored pencil 3 is pressed with constant force in the direction of the heating plate 1.
  • the device also has a feed device 17 consisting of a pair of rollers, a pair of pull rollers 10, a cooling drum 9 and further two web guide rollers 11. Furthermore, a holder (not shown) for an ink ribbon cassette 18, which has an ink ribbon 14, a roll 12 and a winding core 13, is provided.
  • the freshly coated thermal ink ribbon passes through the cooling rollers 9 to the pair of draw rollers 10.
  • the speed of this roller group is set such that the web of the thermal ink ribbon is always kept taut without overstretching it. From here, the thermal ribbon reaches the cassette via the web guide roll 11 and is wound up there by the winding core 13, which is driven by a special winder, not shown.
  • the device according to the invention is not only used for the regeneration of thermal ribbons. Rather, it is in principle also suitable for forming an initial coating.
  • FIG. 2 shows schematically a regeneration device which is built into a writing apparatus.
  • a thermal print head 8 two deflection rollers 19 and 20 and an ink ribbon cassette 18 with winding core 12 and unwinding spool 13 are shown of the writing apparatus.
  • the thermal ink ribbon 14 which is guided past the thermal printhead 8 by the cassette 18 via the deflection rollers 19 and 20 is passed over a regeneration device according to the invention, which in turn consists of a heating plate 1, a pre-squeegee or smoothing roller 5, a post-squeegee or further smoothing rollers 6, a colored pencil 3 with guide 2 and a tracking device 4.
  • the heater board 1 is provided with a groove 15 ( Figure 3) in which the thermal ink ribbon 14 is running and arbrich of the calender rolls 5 and 6 and of the F 3, is processed as described in connection with FIG. 1 It has been shown that the path of the hot plate 1 via the deflecting rollers 20 and 19 to the A ufwickelkern 12 of the cassette 18 is sufficient to the freshly coated thermal ink ribbon to allow time for sufficient cooling and solidification of the applied color materials.
  • the heating plate 1 is supported by a mechanism, not shown, so that it is displaceable in the direction of the smoothing rollers 5 and 6.
  • the smoothing rollers 5 and 6 can also be moved in the same direction. In normal writing operation, the smoothing rollers 5 and 6 are moved away from the heating plate 1.
  • the tracking device 4 for the colored pencil 3 is also controlled in such a way that the colored pencil 3 is withdrawn sufficiently and no longer touches the thermal ink ribbon 14.
  • the writing position is shown in Figure 4.
  • the fresh thermal ribbon is pulled off the unwind roll 12.
  • the melting ink is transferred to the paper to be written by the thermal print head 8.
  • the copied thermal ink ribbon is wound up by the core 13 in a manner known per se. After the thermal ink ribbon has run through and has been written off, it is regenerated, as described with reference to FIG. 2 above.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
EP85110258A 1984-11-17 1985-08-16 Procédé, dispositif et feutre de couleur pour la régénération de rubans encreurs à chaleur Withdrawn EP0182011A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3442181 1984-11-17
DE3442181 1984-11-17

Publications (2)

Publication Number Publication Date
EP0182011A2 true EP0182011A2 (fr) 1986-05-28
EP0182011A3 EP0182011A3 (fr) 1988-01-07

Family

ID=6250630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110258A Withdrawn EP0182011A3 (fr) 1984-11-17 1985-08-16 Procédé, dispositif et feutre de couleur pour la régénération de rubans encreurs à chaleur

Country Status (1)

Country Link
EP (1) EP0182011A3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007031039A2 (fr) 2005-09-14 2007-03-22 Ivan Fucik Pierre synthetique de forte translucidite, procede de production et utilisation
US8818521B2 (en) 2008-06-11 2014-08-26 Biotronik Crm Patent Ag Implantable medical device
WO2015054127A1 (fr) * 2013-10-09 2015-04-16 Markem-Imaje Corporation Appareil et méthode d'impression par thermotransfert
US10449781B2 (en) 2013-10-09 2019-10-22 Dover Europe Sarl Apparatus and method for thermal transfer printing
US11040548B1 (en) 2019-12-10 2021-06-22 Dover Europe Sarl Thermal transfer printers for deposition of thin ink layers including a carrier belt and rigid blade

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH553662A (fr) * 1972-04-26 1974-09-13 Battelle Memorial Institute Procede de regeneration d'un film d'encre thermo-fusible et dispositif pour la mise en oeuvre du procede.
US4048952A (en) * 1976-04-12 1977-09-20 Columbia Ribbon & Carbon Mfg. Co., Inc. Direct ribbon inking by gravure
JPS5865686A (ja) * 1981-10-15 1983-04-19 Ricoh Co Ltd 転写式記録装置におけるインク担持体の再生装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007031039A2 (fr) 2005-09-14 2007-03-22 Ivan Fucik Pierre synthetique de forte translucidite, procede de production et utilisation
US8818521B2 (en) 2008-06-11 2014-08-26 Biotronik Crm Patent Ag Implantable medical device
WO2015054127A1 (fr) * 2013-10-09 2015-04-16 Markem-Imaje Corporation Appareil et méthode d'impression par thermotransfert
US9296200B2 (en) 2013-10-09 2016-03-29 Markem-Imaje Corporation Apparatus and method for thermal transfer printing
US9604468B2 (en) 2013-10-09 2017-03-28 Markem-Imaje Corporation Apparatus and method for thermal transfer printing
US9789699B1 (en) 2013-10-09 2017-10-17 Dover Europe Sarl Apparatus and method for thermal transfer printing
US10449781B2 (en) 2013-10-09 2019-10-22 Dover Europe Sarl Apparatus and method for thermal transfer printing
US11040548B1 (en) 2019-12-10 2021-06-22 Dover Europe Sarl Thermal transfer printers for deposition of thin ink layers including a carrier belt and rigid blade

Also Published As

Publication number Publication date
EP0182011A3 (fr) 1988-01-07

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