EP0423605A2 - Farbbandkassette - Google Patents

Farbbandkassette Download PDF

Info

Publication number
EP0423605A2
EP0423605A2 EP90119408A EP90119408A EP0423605A2 EP 0423605 A2 EP0423605 A2 EP 0423605A2 EP 90119408 A EP90119408 A EP 90119408A EP 90119408 A EP90119408 A EP 90119408A EP 0423605 A2 EP0423605 A2 EP 0423605A2
Authority
EP
European Patent Office
Prior art keywords
ink
ribbon
viscosity
reservoir
absorbed
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
EP90119408A
Other languages
English (en)
French (fr)
Other versions
EP0423605B1 (de
EP0423605A3 (en
Inventor
Hiroshi C/O Oki Electric.Ind.Co.Ltd. Kikuchi
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Publication of EP0423605A2 publication Critical patent/EP0423605A2/de
Publication of EP0423605A3 publication Critical patent/EP0423605A3/en
Application granted granted Critical
Publication of EP0423605B1 publication Critical patent/EP0423605B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J31/16—Renovating or testing ink ribbons while fitted in the machine using the ink ribbons

Definitions

  • This invention relates to a ribbon cassette for a serial printer.
  • Some ribbon cassettes store ribbons within a cassette, which is then mounted to the carriage of a printer. Such ribbon cassettes allow easy ink ribbon fitting and prevent ink from smearing on a person's hands or on the device itself. These cassettes also enable the device to be compact.
  • the printing life of the ribbon is generally determined by the amount of ink absorbed by the ribbon and the life of the ribbon's base cloth, which is normally much longer than the printing life.
  • the life of the ink ribbon material should be nearly equal to that of the ink supply for printing. But this is not the case in conventional ribbon cassettes.
  • a ribbon cassette equip with a means of dispensing ink in the proper amount to the ribbon and thus extend the printing life of the ink ribbon is proposed.
  • the viscosity of ink absorbed by the ribbon is set to a small value for graphic printers to increase the supply of ink to the ribbon, since the printing efficiency (number of printed dots/unit ink ribbon area) is high and the ink usage rate is high and the viscosity is set to a higher value for Chinese Character printers to maintain high quality printing.
  • ink viscosity is an important element of the printing quality.
  • the viscosity of the ink absorbed by the previously described ribbon is higher than that in the ink replenishing system, the amount of ink replenished is less than what the ribbon can absorb, and the ink runs out the printing quality or density will deteriorate.
  • the replenishing performance of ink from the ink reservoir depends on the viscosity of the ink.
  • the ink's replenishing properties improve when the ink's viscosity is low.
  • the object of this invention is to make the viscosity of the ink absorbed by the previously described ribbon higher than that of ink of the ink reservoir in a ribbon cassette provided with a ribbon storage unit which folds and stores the ink ribbon, a driving roller and a follower roller which moves the ink ribbon through the opening of the ribbon storage unit, an inker which touches this follower roller, and the ink reservoir which supplies ink to this inker.
  • this invention has a feature that the viscosity of ink absorbed by the ribbon is higher than that of the reservoir ink by 100 to 1000 CP in the ribbon cassette where the ink reservoir is provided.
  • Fig. 1 shows the ribbon cassette, as viewed from an angle. This ribbon cassette can be used in carriages for wire-dot type printers.
  • Fig. 2 is a plan of the inside of the ribbon cassette.
  • Fig. 3 is an explanatory drawing of the inker.
  • the ribbon (1) is endless as it is a m ⁇ bius strip, and it is stored within the ribbon cassette (2), and is only partially exposed to the outside.
  • the ribbon can be made of nylon or polyester, for example.
  • Nylon 66 Dupon PA66
  • This nylon 66 is 0. 12 mm thick and has nylon string mesh of 146 lines per inch vertically and 148 lines per inch horizontally.
  • One nylon string consists of a twisted 34 40-Denier string. An ink with a viscosity of 400 to 1500 CF is absorbed by the ribbon.
  • the ribbon (1) is in the ribbon storage unit (3) of the ribbon cassette (2) and the ribbon guiding parts (4a) and (4b) rotate in the direction of arrow.
  • the driving roller (5) is located at the opening of the ribbon storage unit (2) and is supported by the driving roller fixing component (6).
  • This driving roller can be made of polyacetal, for example.
  • the follower roller (7) touches the driving roller (5) and is supported by the follower roller supporter (8).
  • This follower roller (7) is, for example, made of polyacetal.
  • the inker (9) touches the follower roller (7) and the inker (9) is connected to the ink reservoir (10), absorbs ink from the ink reservoir (10) by capillary act ion, and then dispenses it to the follower roller (7).
  • the spring (11) is a means for pressing the follower roller (7) to the driving roller (5).
  • the inker (9) can be made of felt, for example.
  • the inker (9) can also be made of plastic fiber cotton which absorbes an ink with a viscosity of 200 to 1000 CP.
  • the ribbon (1) held by the driving roller (5) and the follower roller (7) is wound into the ribbon storage unit (3) by the driving roller (5) and is folded before being stored.
  • the ejected ribbon (1) passes through the ribbon guider (4a) performs its function and then is would into the ribbon storage unit (3) as shown in the above, through the ribbon guider (4b).
  • ink from the inker (9) which is in contact with the follower roller (7) supplies ink to it (7), which then transfers and replenishes the ribbon (1).
  • the printer has various printing patterns, such as characters, graphics and ruled lines and the viscosity of ink to be absorbed by the ribbon is determined beforehand to satisfy the printing quality of the resulting print depending on these printing patterns.
  • the viscosity of ink previously absorbed by the ribbon should suit the desired printing quality.
  • ink replenishment is inferior to the absorption efficiency of ink on the ribbon, which thus leads to the deterioration of the printing density.
  • the viscosity of ink previously absorbed by the ribbon should be greater than that of ink in the ink reservoir and the difference in viscosity should be 100 to 1000 CP. Viscosity values closer to 200 CP were optimum for graphics according to an experiment conducted by the inventor. A viscosity difference of 300 to 500 CP was found appropriate for Chinese characters. It was also found that if the viscosity difference is within 300 CP or the ink's viscosity in the ink reservoir is within 50 of the ink viscosity of the ribbon, ink from the ink reservoir can be properly transferred to the ribbon and the desired printing quality can be obtained.
  • an ink ribbon cassette where a ribbon storage unit for folding and storing the ink ribbon is provided, a driving roller and the follower roller pass the ribbon through the opening of the ribbon storage unit, the ink reservoir supplies ink to the inker which touches the follower roller and ink replenishing part, a process of properly transferring ink in the ink reservoir to the ribbon and that for obtaining a desired printing quality can be achieved by setting the viscosity of the ink previously absorbed by the ribbon higher than that of ink in the ink reservoir.
  • the above ribbon cassette is not limited to it and this invention can also be applied to the ink ribbon cassette whereby ink is picked from the ink reservoir by a gear and then supplied to the ribbon.

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  • Impression-Transfer Materials And Handling Thereof (AREA)
EP90119408A 1989-10-18 1990-10-10 Farbbandkassette Expired - Lifetime EP0423605B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1269150A JPH089256B2 (ja) 1989-10-18 1989-10-18 インクリボンカセット
JP269150/89 1989-10-18

Publications (3)

Publication Number Publication Date
EP0423605A2 true EP0423605A2 (de) 1991-04-24
EP0423605A3 EP0423605A3 (en) 1991-07-31
EP0423605B1 EP0423605B1 (de) 1995-06-21

Family

ID=17468374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119408A Expired - Lifetime EP0423605B1 (de) 1989-10-18 1990-10-10 Farbbandkassette

Country Status (3)

Country Link
EP (1) EP0423605B1 (de)
JP (1) JPH089256B2 (de)
DE (1) DE69020294T2 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435082A1 (de) * 1984-09-25 1986-04-03 Wolf-Detlev Dipl.-Päd. 6555 Sprendlingen Luther Geraet zum wiedereinfaerben von textil-farbbandkassetten
EP0210755A2 (de) * 1985-06-27 1987-02-04 Oki Electric Industry Company, Limited Farbzufuhranordnung für Farbband in einer Kassette

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435082A1 (de) * 1984-09-25 1986-04-03 Wolf-Detlev Dipl.-Päd. 6555 Sprendlingen Luther Geraet zum wiedereinfaerben von textil-farbbandkassetten
EP0210755A2 (de) * 1985-06-27 1987-02-04 Oki Electric Industry Company, Limited Farbzufuhranordnung für Farbband in einer Kassette

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Robinson A.T.C and Marks R.: "Woven Cloth Construction" 1967, Textile Institute, Manchester *
Robinson A.T.C and Marks R.: "Woven Cloth Construction" 1967, TextileInstitute, Manchester, page 40, line 30 - page 43, line 2; figure 3.3f *

Also Published As

Publication number Publication date
DE69020294D1 (de) 1995-07-27
EP0423605B1 (de) 1995-06-21
JPH089256B2 (ja) 1996-01-31
JPH03132387A (ja) 1991-06-05
DE69020294T2 (de) 1996-04-04
EP0423605A3 (en) 1991-07-31

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