EP0500334A2 - Punktmatrixdrucker für wärmeempfindliche Aufzeichnung - Google Patents

Punktmatrixdrucker für wärmeempfindliche Aufzeichnung Download PDF

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Publication number
EP0500334A2
EP0500334A2 EP92301345A EP92301345A EP0500334A2 EP 0500334 A2 EP0500334 A2 EP 0500334A2 EP 92301345 A EP92301345 A EP 92301345A EP 92301345 A EP92301345 A EP 92301345A EP 0500334 A2 EP0500334 A2 EP 0500334A2
Authority
EP
European Patent Office
Prior art keywords
thermal
thermal recording
heat emitting
scanning direction
images
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.)
Ceased
Application number
EP92301345A
Other languages
English (en)
French (fr)
Other versions
EP0500334A3 (en
Inventor
Takanori C/O Riso Kagaku Corp. Hasegawa
Koichi c/o Riso Kagaku Corp. Okusawa
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.)
Riso Kagaku Corp
Original Assignee
Riso Kagaku Corp
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 Riso Kagaku Corp filed Critical Riso Kagaku Corp
Publication of EP0500334A2 publication Critical patent/EP0500334A2/de
Publication of EP0500334A3 publication Critical patent/EP0500334A3/en
Ceased 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
    • B41J2/345—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 characterised by the arrangement of resistors or conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/14—Forme preparation for stencil-printing or silk-screen printing
    • B41C1/144—Forme preparation for stencil-printing or silk-screen printing by perforation using a thermal head
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/30—Embodiments of or processes related to thermal heads
    • B41J2202/32—Thermal head for perforating stencil

Definitions

  • the present invention relates to a thermal recording device for forming an image with a dot matrix by applying a thermal head to a heat-sensitive recording material such as heat-sensitive printing paper, thermal transfer ribbon, and thermal stencil master plates made by laminating a thermo-plastic film over a porous support.
  • a heat-sensitive recording material such as heat-sensitive printing paper, thermal transfer ribbon, and thermal stencil master plates made by laminating a thermo-plastic film over a porous support.
  • the thermal recording device which forms images with a dot matrix by using a thermal head is conventionally known, and such a thermal recording device forms images by applying a thermal head consisting of a plurality of heat emitting elements onto thermal recording paper, an OHP coloring TP sheet, an OHP frosted TP sheet, recording paper in conjunction with the use of thermal transfer ribbon, or a recording surface of heat sensitive recording material such as a thermal stencil master plate, and by selectively heating the heat emitting elements.
  • Such thermal recording devices are widely used as facsimiles, printers for ticket dispensers, handheld copiers, OHP transparency making devices, and thermal master plate making devices.
  • thermo-plastic film of a thermal stencil master plate If a thermal stencil master plate is processed or made by forming stencil images on a thermo-plastic film of a thermal stencil master plate with a thermal head for a facsimile of the above described kind in a mode equivalent to the high resolution mode of the facsimile standard, continuous openings will be formed in the thermo- plastic film of the thermal stencil master plate along the secondary scanning direction due to the above-mentioned overlapping. This causes not only the thickening and blurring of the lines of printed character and line images but also excessive deposition of ink onto the printing paper in solid areas of the picture images which could in turn cause conspicuous smearing of the reverse surface of the printing paper by ink transfer in continuous printing.
  • thermo-plastic resin film of the thermal stencil master plate since the perforations formed in the thermo-plastic resin film of the thermal stencil master plate are formed so as to be independent from each other in both primary and secondary scanning directions, it is possible to faithfully reproduce character images by printing, and to control excessive deposition of ink and reduce ink transfer from one sheet to another.
  • images formed by perforation of a film of a thermal stencil master plate are inferior in quality as compared to those formed by using thermal coloring type media such as thermal recording paper in terms of reproducibility (resolution) as compared to the original images, in particular the evenness of fine lines and small characters, legibility of small outlined characters, the sharpness of fine black and white patterns such as halftone screen images, and digitally reproduced photographic gradations.
  • the perforation of the thermo-plastic resin film of the thermal stencil master plate due to melting tends to be excessive, and, combined with the lowering of the viscosity of the ink, the thickening and blurring of lines of character images become more pronounced, as compared to the original images, than in normal or low temperature environment. Additionally, the smearing or the ink transfer of the printing paper tends to be more pronounced due to increase in the amount of ink deposition, and the acceptable temperature range becomes narrower.
  • thermal recording device which can achieve the picture quality equivalent or comparable to those of the picture images produced by the coloring of thermal recording paper in the picture images produced by using the thermal stencil master plate, and achieving a desired uniformity in picture quality even when thermal recording materials having different recording properties are used.
  • a primary object of the present invention is to eliminate such problems and to provide a thermal stencil master plate making device which can form favorable stencil images for a given resolution of the thermal head, reproduce faithful printed images for all kinds of original picture images, prevent ink transfer, and adapt itself to various environmental conditions.
  • a second object of the present invention is to provide a thermal recording device which is suitable for use with a wide range of thermal recording materials having different recording properties, such as thermal recording paper, OHP TP sheets, and thermal stencil master plates.
  • a thermal recording device for forming an image with a dot matrix by applying a thermal head consisting of a plurality of heat emitting elements arranged in a single row at a first pitch along a primary scanning direction onto a surface of a thermal recording material and moving the thermal recording material relative to the thermal head in a secondary scanning direction perpendicular to the primary scanning direction, and selectively heating the heat emitting elements for each successive movement of the thermal recording material at a second pitch in the secondary scanning direction, wherein: a ratio of a length of each of the heat emitting elements of the thermal head in the primary scanning direction to the first pitch is 30 to 70%, and a ratio of a length of each of the heat emitting elements of the thermal head in the secondary scanning direction to the second pitch is 60 to 95%.
  • the primary reason which makes the quality of the picture images formed by thermal stencil master plate printing less favorable to that by thermal recording paper printing is found in the fact that the shape of the perforated dots in the film of the thermal stencil master plate are not so uniform as the colored dots of the thermal recording paper and, even though they may form independent dots, for instance, when three consecutive heat emitting elements along the secondary scanning direction are heated at the same time to form an image by perforation, the heat emitting elements are affected by the adjacent ones and the behavior of the melting and shrinking of the part of the perforated thermo-plastic resin film which directly contacts the heat emitting elements depend on the way the film is supported by the porous support fibers.
  • the melting and shrinking of the film tends to be excessive. If such an area not supported by fibers extends over a number of heat emitting elements and is heated by several of the heat emitting elements at the same time, the dots may excessively expand or clog adjacent ones by expansion with the result that the adjacent dots are affected and the sizes of the perforated dots become uneven.
  • the thermal effect from adjacent heat emitting elements becomes so pronounced that the thickening and blurring of fine lines tends to be significant, the quality of picture images become even more inferior to those of the thermal recording paper, and the excessive deposition of printing ink onto the printing paper through the expanded dots increases the possibility of ink transfer or the smearing of the reverse surface of the printing paper.
  • each of the dots would not be affected by the heating of the dots adjacent thereto along the primary scanning direction, and stable perforation may be achieved on the thermo- plastic resin film of the thermal stencil master plate so that the evenness of the perforated dots can be improved, and the quality of the printed images becomes comparable to that of the thermal recording paper. Further, in carrying out the process of plate making in high temperature environment, perforations may be formed in a stable fashion to an extent which has not heretofore been attainable, and the quality of picture images may be improved with the added advantage of eliminating ink transfer.
  • each of the perforated dots is independent from each other, and the shape of the dots is highly uniform, the part remaining between the perforated dots of the thermo-plastic resin film of the thermal stencil master plate is made uniform, and the strength of the film is improved so that the number of sheets of paper that can be printed with the same master plate may be increased.
  • the thermal recording device of the present invention offers a significant advantage over the method of making a recorded article with a number of steps such as the method involving the steps of processing a thermal stencil master plate and making printed materials, and the method of processing printing paper by using such thermal recording media as thermal transfer ribbon, and can be used in conjunction with the method of making recorded materials with a single step by using such materials as thermal recording paper and OHP coloring TP sheets.
  • the printed records are formed by independent dots, and the density of the printed characters (colored images) may become slightly less dark due to the reduction in the area of each printed (colored) dot. But, it is not significant, and the reproducibility and legibility of small characters and images actually improve.
  • FIG. 1 shows the general structure of an example of thermal recording device according to the present invention.
  • thermal recording material 1 is held between a pair of conveyer rollers 2, and is conveyed in the direction indicated by the arrow A (secondary scanning direction) until it is placed between a platen roller 3 and a thermal head 4.
  • heat emitting elements 5 provided in the thermal head 4 are directed contacted to a recording surface (surface 1a a in the drawing) of the thermal recording material 1, and recorded images are formed on the recording surface 1a a of the recording material 1 by selectively heating the heat emitting elements 5.
  • the recording surface 1a of the thermal recording material 1 corresponds to the surface carrying the coloring layer of thermal printing paper or coloring type TP sheet, or the thermo-plastic resin film of a thermal stencil master plate, or the base film of thermal transfer ribbon.
  • FIG. 2 is a schematic plan view of the thermal head 4.
  • the heat emitting elements 5 of this thermal head 4 each having a rectangular shape, are arranged in a single row, at a pitch of Pa, along a primary scanning direction which is perpendicular to the secondary scanning direction given as a direction in which the thermal stencil master plate is conveyed or as the direction of the relative movement.
  • the two ends along the secondary scanning direction of each of the heat emitting elements 5 are connected to electrodes 6, respectively, so that electric power may be supplied individually to each of the heat emitting elements 5.
  • the dot pitch of the dot matrix of the images formed on the recording surface 1a of the thermal recording material 1 in the primary scanning direction is determined by the pitch Pa of the heat emitting elements 5 in the primary scanning direction
  • the dot pitch of the matrix in the secondary scanning direction is determined by the heat emitting response property of the heat emitting elements 5 of the thermal head 4 in relation with the moving speed of the thermal recording material in the secondary scanning direction.
  • various parameters are so selected that the dot pitch of the dot matrix of the images formed by the heat from the heat emitting elements 5 of the thermal head 4 in the secondary scanning direction is made to be equal to the dot pitch in the primary scanning direction.
  • the thermal recording device of the present embodiment is characterized by the size of each of the heat emitting elements 5 being as follows:
  • the dot pitch (secondary scanning pitch Pb) of the dot matrix of the images formed by the heat from the heat emitting elements 5 in the secondary scanning direction is equal to the dot pitch in the primary scanning direction which is equal to the pitch (primary scanning pitch) Pa of the heat emitting elements 5 in the primary scanning direction.
  • the region of heat generation of each of the heat emitting elements will not be affected by the heat from the adjacent heat emitting elements 5, and the recorded traces or, in the case of thermal recording paper, the colored dots, the perforated dots in the case of the thermal stencil master plate, and the frosted dots in the case of the OHP frost type TP sheet will be independent from each other both in the primary and secondary directions, leaving gaps of unrecorded regions between the recorded dots.
  • the size of these dots depends on the size of the heat emitting elements, the sensitivity of the thermal recording material or the medium, the coloring properties in the case of the thermal recording paper, the perforation property of the thermo-plastic resin film in the case of the thermal stencil master plate, and the melting and transferring properties of the ink sheet onto the printing paper in the case of the transfer ribbon.
  • the gaps between the recorded dots are particularly useful for such thermal recording materials as thermal stencil master plate and thermal transfer ribbon which can rely on the seeping of ink, and the plate making or the printing by the device of the present invention can produce optimum gaps in the recording material.
  • the perforated dots are connected in both the secondary and primary scanning directions particularly under a high temperature condition, and unfavorable results such as the thickening and blurring of the lines of images and the ink transfer from one sheet of the printing paper to another tend to occur. If the ratio related to the dot pitch is smaller than that of the device of the present invention, the distance between adjacent perforated dots becomes excessive, and the thinning of picture images and lowering of gradation level in solid areas tend to occur.
  • the ink used in this embodiment had a spread meter reading of one minute value of 33, and the printing device was the same as above (the same thing applies to the subsequent embodiments).
  • the processing of the thermal recording paper (tradename: Riso thermal paper sheet type C-197) and OHP TP sheet (tradename: Riso TP film T-113) was also carried out with the single copy mode of the aforementioned device.
  • the ambient temperature was 23°C.
  • the thermal stencil master plate was fabricated by laminating a polyester film (2 ⁇ m in thickness) and a porous support (9.5 g/m 2 , manila hemp thin paper) with a bonding agent, and applying a release agent on the surface of the film facing the thermal head.
  • the thermal recording paper consisted of base paper carrying a layer of heat sensitive coloring agent with a density of 57 g/m2.
  • the OHP TP film consisted of a polyester film (50 f..lm in thickness) provided with a layer of a coloring agent.
  • the perforated dots which formed solid parts of the picture image were independent from each other, and formed a uniform dot matrix so that the unprocessed gaps between the adjacent dots may extend in both the primary and secondary scanning directions uniformly in the manner of a grid.
  • a prescribed number of prints were made by operating the aforementioned recording device at the rate of 60 to 130 sheets per minute, and the reverse surface of each of the printed sheets piled into a stack showed substantially no smearing by ink or no ink transfer.
  • the durability of the master plate was found to be favorable.
  • the perforated dots of the thermal stencil master plate and the colored dots of the thermal recording paper and the OHP TP sheet had a tendency to be slightly smaller than those of the first embodiment, but a required picture quality was ensured in each case without creating any problem.
  • the perforated dots of the thermal stencil master plate and the colored dots of the thermal recording paper and the OHP TP sheet had a tendency to be slightly larger than those of the first embodiment, but a required picture quality was ensured in each case without creating any problem.
  • thermal recording materials thermal stencil master plate, thermal recording paper and OHP TP sheet
  • the recordability of the thermal recording materials was investigated by using a thin film type thermal head of 400 DPI which was set up as described above and the same device and original as the first embodiment.
  • the ambient temperature was 23°C.
  • the condition of the plate in the solid regions was found to be favorable as shown in the microscopic photographs of Figures 5 and 6.
  • the perforated dots forming the solid areas were independent from each other, and formed a uniform dot matrix by defining unprocessed gaps between consecutive dots in both the primary and secondary directions in the manner of a grid.
  • a prescribed number of prints were made by operating the aforementioned recording device at the rate of 60 to 130 sheets per minute, and the reverse surface of each of the printed sheets piled into a stack showed substantially no smearing by ink.
  • the durability of the master plate was found to be satisfactory.
  • the perforated dots of the thermal stencil master plate and the colored dots of the thermal recording paper and the OHP TP sheet had a tendency to be slightly smaller than those of the fourth embodiment, but a required picture quality was ensured in each case without creating any problem.
  • the perforated dots of the thermal stencil master plate and the colored dots of the thermal recording paper and the OHP TP sheet had a tendency to be slightly larger than those of the fourth embodiment, but a required picture quality was ensured in each case without creating any problem.
  • thermal recording materials thermal stencil master plate, thermal recording paper and OHP TP sheet
  • the recordability of the thermal recording materials was investigated by using a thin film type thermal head of 400 DPI which was set up as described above and the same device and original as the first embodiment.
  • the ambient temperature was 23°C.
  • the perforated dots forming the solid areas were independent from each other, and formed a uniform dot matrix by defining unprocessed gaps between consecutive dots in both the primary and secondary directions in the manner of a grid.
  • the perforated dots of the thermal stencil master plate and the colored dots of the thermal recording paper and the OHP TP sheet had a tendency to be slightly smaller than those of the seventh embodiment, but a required picture quality was ensured in each case without creating any problem.
  • the perforated dots of the thermal stencil master plate and the colored dots of the thermal recording paper and the OHP TP sheet had a tendency to be slightly larger than those of the seventh embodiment, but a required picture quality was ensured in each case without creating any problem.
  • thermal recording materials thermal stencil master plate, thermal recording paper and OHP TP sheet
  • the recordability of the thermal recording materials was investigated by using a thin film type thermal head of 400 DPI which was set up as specified below and the same device and original as the first embodiment for the purpose of comparing it to those of the embodiments 1 through 9.
  • the ambient temperature was 23°C.
  • the character images involved substantial thickening and blurring, and the solid areas contained a substantial amount of imprints of the fibrous support. This was caused by the parts of the film corresponding to those dots which were thermally affected by adjacent heat emitting elements and excessively melted, and the fluidized film which entangled with the fibers of the porous support and formed resolidified film or lumps. Further, the perforated dots became uneven in size, and the height of the ink deposited on the printing paper became uneven thereby causing unevenness in the density of the picture image.
  • the unprocessed gaps between the perforated dots are less than those of the embodiments, and the mechanical strength of the film was diminished, thus producing generally less favorable results than those of the above mentioned embodiments.
  • the colored dots forming solid regions were continuous, and a sufficient density was obtained.
  • small character images involved thickening and blurring of lines, and legibility was diminished as compared to the above described embodiments.
  • thermal recording materials thermal stencil master plate, thermal recording paper and OHP TP sheet
  • the recordability of the thermal recording materials was investigated by using a thin film type thermal head of 400 DPI which was set up as specified below and the same device and original as the first embodiment.
  • the ambient temperature was 23°C.
  • the density of the coloring in the solid areas was sufficiently high, and a microscopic observation revealed some continuity in the colored dots.
  • the picture images were generally favorable except for some thickening and merging of the lines of small characters.
  • the perforations in the thermal stencil master plate were continuous in both the primary and secondary scanning directions, and the picture images contained more imprints of the fibrous support than the first example for comparison with the added disadvantages of more severe ink transfer and increased ink consumption.
  • the perforations of the thermal stencil master plate were continuous in both the primary and secondary scanning directions in some areas, but there were also areas where perforations were not produced (due to insufficient sensitivity).
  • the prints contained excessive unevenness in density.
  • the character images of the OHP TP film involved thinning (breaks in fine lines) due to the insufficiency in sensitivity.
  • the density of solid areas was favorably high, but excessive merging and thickening of the lines of the character images prevented reproduction of clear images.
  • the ratios of the lengths of each heat emitting element in the primary and secondary scanning directions are 30 to 70% and 60 to 95%, respectively, to the dot pitches in the corresponding directions in the thermal plate making device of the present invention, faithful reproduction is possible for all kinds of images including small character images and solid images, and one can obtain other advantages such as a favorable ink transfer prohibiting property, a high plate durability, a favorable print capability with controlled ink consumption, and an expanded environmental adaptability which can cover a wide temperature range.
  • the thermal recording device is suitable for use with thermal recording paper and OHP TP sheets, and is particularly advantageous in reproducing minute character images.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Electronic Switches (AREA)
EP19920301345 1991-02-21 1992-02-19 Dot-matrix thermal recording device Ceased EP0500334A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP27517/91 1991-02-21
JP2751791A JP3043443B2 (ja) 1991-02-21 1991-02-21 感熱製版装置

Publications (2)

Publication Number Publication Date
EP0500334A2 true EP0500334A2 (de) 1992-08-26
EP0500334A3 EP0500334A3 (en) 1992-11-19

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EP19920301345 Ceased EP0500334A3 (en) 1991-02-21 1992-02-19 Dot-matrix thermal recording device

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JP (1) JP3043443B2 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572193A2 (de) * 1992-05-27 1993-12-01 Brother Kogyo Kabushiki Kaisha Thermische Schabloniervorrichtung
EP0589710A2 (de) * 1992-09-24 1994-03-30 Brother Kogyo Kabushiki Kaisha Vorrichtung zur Herstellung von Schablonen
EP0640487A2 (de) * 1993-08-24 1995-03-01 Casio Computer Co., Ltd. Thermischer Punktdrucker
GB2304643A (en) * 1994-11-11 1997-03-26 Tohoku Ricoh Co Limited Stencil printer with an improved thermal head
EP1080921A3 (de) * 1999-08-31 2001-06-13 Riso Kagaku Corporation Thermokopf
EP1080941A3 (de) * 1999-08-31 2001-06-13 Riso Kagaku Corporation Vorrichtung zur thermischen Herstellung von Schablonen
EP1080920A3 (de) * 1999-08-31 2001-06-13 Riso Kagaku Corporation Vorrichtung zum Herstellen von Thermoschablonen
EP1419888A3 (de) * 2002-11-13 2004-07-28 Agfa-Gevaert Thermokopfdrucker und Verfahren zum Drucken auf thermographischen Aufzeichnungsmaterialien
US7023460B2 (en) 2002-11-13 2006-04-04 Agfa Gevaert Thermal head printer and process for printing substantially light-insensitive recording material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3159348B2 (ja) * 1993-02-18 2001-04-23 東北リコー株式会社 感熱孔版マスタの製版方法及び製版装置
GB2287224B (en) * 1994-03-02 1997-08-13 Tohoku Ricoh Co Limited Control device for a thermosensitive stencil printer
JP3811406B2 (ja) 2001-08-02 2006-08-23 デュプロ精工株式会社 孔版印刷の製版方法および製版装置ならびに孔版印刷機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428690A (en) * 1981-07-24 1984-01-31 Fuji Xerox Co., Ltd. Thermal recording print head
US4559542A (en) * 1982-06-07 1985-12-17 Fuji Xerox Co., Ltd. Thermal printing head
US4675692A (en) * 1984-02-13 1987-06-23 Canon Kabushiki Kaisha Dot printing method and apparatus
US4781113A (en) * 1986-03-19 1988-11-01 Brother Kogyo Kabushiki Kaisha Electric conduction printer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4428690A (en) * 1981-07-24 1984-01-31 Fuji Xerox Co., Ltd. Thermal recording print head
US4559542A (en) * 1982-06-07 1985-12-17 Fuji Xerox Co., Ltd. Thermal printing head
US4675692A (en) * 1984-02-13 1987-06-23 Canon Kabushiki Kaisha Dot printing method and apparatus
US4781113A (en) * 1986-03-19 1988-11-01 Brother Kogyo Kabushiki Kaisha Electric conduction printer

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572193A2 (de) * 1992-05-27 1993-12-01 Brother Kogyo Kabushiki Kaisha Thermische Schabloniervorrichtung
EP0572193A3 (en) * 1992-05-27 1994-05-18 Brother Ind Ltd Thermal stenciling device
US5384585A (en) * 1992-05-27 1995-01-24 Brother Kogyo Kabushiki Kaisha Thermal stenciling device
EP0589710A2 (de) * 1992-09-24 1994-03-30 Brother Kogyo Kabushiki Kaisha Vorrichtung zur Herstellung von Schablonen
EP0589710A3 (de) * 1992-09-24 1995-01-04 Brother Ind Ltd Vorrichtung zur Herstellung von Schablonen.
US5491503A (en) * 1992-09-24 1996-02-13 Brother Kogyo Kabushiki Kaisha Stencil-producing apparatus
EP0640487A2 (de) * 1993-08-24 1995-03-01 Casio Computer Co., Ltd. Thermischer Punktdrucker
EP0640487A3 (de) * 1993-08-24 1996-12-04 Casio Computer Co Ltd Thermischer Punktdrucker.
GB2304643A (en) * 1994-11-11 1997-03-26 Tohoku Ricoh Co Limited Stencil printer with an improved thermal head
GB2304643B (en) * 1994-11-11 1997-05-14 Tohoku Ricoh Co Limited Stencil printer with an improved thermal head
EP1080921A3 (de) * 1999-08-31 2001-06-13 Riso Kagaku Corporation Thermokopf
EP1080941A3 (de) * 1999-08-31 2001-06-13 Riso Kagaku Corporation Vorrichtung zur thermischen Herstellung von Schablonen
EP1080920A3 (de) * 1999-08-31 2001-06-13 Riso Kagaku Corporation Vorrichtung zum Herstellen von Thermoschablonen
US6362846B1 (en) 1999-08-31 2002-03-26 Riso Kagaku Corporation Thermal stencil making apparatus
US6366305B1 (en) 1999-08-31 2002-04-02 Riso Kagaku Corporation Thermal stencil making method
US6452621B1 (en) 1999-08-31 2002-09-17 Riso Kagaku Corporation Thermal head
EP1419888A3 (de) * 2002-11-13 2004-07-28 Agfa-Gevaert Thermokopfdrucker und Verfahren zum Drucken auf thermographischen Aufzeichnungsmaterialien
US7023460B2 (en) 2002-11-13 2006-04-04 Agfa Gevaert Thermal head printer and process for printing substantially light-insensitive recording material

Also Published As

Publication number Publication date
EP0500334A3 (en) 1992-11-19
JPH04265759A (ja) 1992-09-21
JP3043443B2 (ja) 2000-05-22

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