EP0409558A1 - Gerät zur Verwendung in einem Tintenstrahldrucker - Google Patents

Gerät zur Verwendung in einem Tintenstrahldrucker Download PDF

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Publication number
EP0409558A1
EP0409558A1 EP90307799A EP90307799A EP0409558A1 EP 0409558 A1 EP0409558 A1 EP 0409558A1 EP 90307799 A EP90307799 A EP 90307799A EP 90307799 A EP90307799 A EP 90307799A EP 0409558 A1 EP0409558 A1 EP 0409558A1
Authority
EP
European Patent Office
Prior art keywords
ink jet
cap
ink
movement
absorber
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Withdrawn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
EP90307799A
Other languages
English (en)
French (fr)
Inventor
Masaru C/O Seiko Instruments Inc. Midorikawa
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of EP0409558A1 publication Critical patent/EP0409558A1/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Withdrawn legal-status Critical Current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
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16535—Cleaning of print head nozzles using wiping constructions
    • B41J2/16544—Constructions for the positioning of wipers
    • B41J2/16547—Constructions for the positioning of wipers the wipers and caps or spittoons being on the same movable support

Definitions

  • the present invention relates to apparatus for use in an ink jet printer.
  • a printer known to the Applicants is shown in Figure 2 and, in contrast to the apparatus according to the present invention shown in Figure 1, does not include an ink absorber 17; a holder 15 for holding the ink absorber 17, an arm 16 for supporting the holder 15 of the ink absorber 17 and a resilient member 14 for applying pressure to the ink absorber 17.
  • capping is carried out by applying a rubber cap 4 against an ink jet nozzle member 3 of an ink jet head carriage 1a which stays in the capping position and then cleaning is carried out by the suction operation of an ink suction pump (not shown) through a discharge tube 13 connected to a rubber cap 4.
  • the rotational torque of a cap driving motor 11 is applied through a gear 8 and cap driving cam 9 to a cap supporting arm 6 to effect pivoting movement thereof around a shaft 7 to thereby open the cap 4.
  • a cap driving motor 11 When starting printing, the rotational torque of a cap driving motor 11 is applied through a gear 8 and cap driving cam 9 to a cap supporting arm 6 to effect pivoting movement thereof around a shaft 7 to thereby open the cap 4.
  • there may be left an ink droplet or droplets which could not be sucked away by the ink suction pump etc. and which therefore remain attached to a head surface 1b of the ink jet head carriage 1a.
  • the or each left ink droplet flows downwardly due to its own weight to a lower section of the ink jet head carriage 1a.
  • the ink jet head carriage 1a is displaced, as shown in Figure 3, into its printing position such that a print paper sheet 18 is opposite to the ink jet nozzle member 3 in order to effect printing.
  • the head surface 1b is shown as being stained by an ink droplet 21 which could not flow downwardly. Such a droplet may contact the paper sheet 18 so as to stain the latter.
  • apparatus for use in an ink jet printer comprising an ink jet head having ink jet nozzle means disposed on or adjacent to a surface of the ink jet head; a cap movable into and out of a capping position in which it caps the nozzle means; and cap movement means for moving the cap into and out of the capping position characterised in that there is an ink absorber which is arranged to be moved in timed relationship with movement of the cap so that movement of the latter into and out of the capping position is associated with movement of the ink absorber into and out of contact with a portion of the said surface onto which may fall droplets of ink from the nozzle means.
  • the ink absorber is arranged to be moved into contact with the said surface before the cap has moved towards, or has moved fully into, the capping position.
  • the ink absorber is also preferably arranged to be moved out of contact with the said surface after the cap has moved out of, or has started to move out of, the capping position.
  • the ink absorber is preferably connected to the cap movement means for movement thereby into and out of said contact.
  • a resilient member may be provided between the ink absorber and a part of the cap movement means, the resilient member urging the ink absorber away from said part and towards the said surface.
  • the ink absorber may be arranged to contact the head surface prior to the contact of the cap with the ink jet nozzle means.
  • the ink absorber may be removed from the head surface after the cap is released from the ink jet nozzle means so as to produce a time lag which will enable the ink absorber to absorb an ink droplet flowing downwardly from the ink jet nozzle means.
  • the ink droplet can be efficiently absorbed from the head surface.
  • an ink jet head carriage 1a which includes an ink jet head, is supported by a pair of ink jet head shafts 2a and 2b.
  • the carriage 1a may be displaced between a printing position and a capping position, such displacement being in the widthwise direction of a paper sheet in the ink jet printer.
  • an ink jet nozzle member 3 which is provided with a plurality of nozzles and which is disposed on or adjacent to a surface 1b of the ink jet head carriage 1a, is disposed opposite to the printing paper sheet.
  • the ink jet head carriage 1a is displaced to the capping position.
  • the rotational torque of a cap driving motor 11 is transmitted from a motor gear 12 to a gear 8 and to a cap driving cam 9 which is coaxially supported relative to the gear 8 on a shaft 10, so as to effect pivoting movement of a cap supporting arm 6 around a shaft 7 and thereby effect movement of a cap holding member 5 so as to cause opening and closing of a rubber cap 4.
  • the cap supporting arm 6 is provided at one end thereof with the cap 4 which is shaped such as to enclose and seal the ink jet nozzle member 3 from the atmosphere in the capping state.
  • An ink absorber 17 is disposed below the cap 4 so as to be movable into and out of contact with a lower part of the head surface 1b on or adjacent to which the ink jet nozzle member 3 is mounted.
  • a holder 15 is provided to hold the ink absorber 17.
  • a supporting arm 16 is provided to undergo free pivotal movement relative to the cap supporting arm 6 so that there will be a time lag between the timing of the contacting and removal of the ink absorber 17 to and from the head surface 1b during the opening and closing of the cap 4 and in association with the timing of the contacting and releasing of the cap 4 with respect to the ink jet nozzle member 3.
  • a resilient member 14 is provided to press the ink absorber 17 against the ink head surface 1b even while the cap supporting arm 6 carries out the releasing operation of the cap 4. As shown in Figure 5, the resilient member 14 is designed so that the ink absorber 17 can be removed from the head surface 1b after the opening operation of the cap 4 is finished.
  • the resilient member 14, which is provided between the ink absorber 17 and the cap supporting arm 6, urges the ink absorber 17 away from the cap supporting arm 6 and towards the surface 1b.
  • the cleaning of the ink jet nozzle member 3 can be effected by means of a discharge tube 13 through the suction force of an ink suction pump (not shown) after contacting the rubber cap 4 with the ink jet nozzle member 3.
  • the opening of the cap 4 is sequentially carried out as follows from the capping state shown in Figure 4.
  • the cap driving cam 9 acts on the cap supporting arm 6 so that the cap supporting arm 6 receives a rotational force in the clockwise direction around the shaft 7 so as to retain the ink absorber 17 in contact with the lower section of the head surface 1b while the rubber cap 4 is slightly spaced away from the ink jet nozzle member 3.
  • the releasing operation of the cap is completed.
  • This sequential series of steps can be advantageously prolonged depending on the physical nature of ink.
  • the ink absorber 17 can be composed of porous and flexible material or of a polyomer absorbing sheet such as that used in a commercial paper diaper.
  • the ink absorber 17 disposed below the ink jet nozzle member 3 can receive an ink droplet 21 which could not be collected by suction means such as a pump etc. and which is deposited on the head surface 1b after the removal of the rubber cap 4 from the ink jet nozzle member 3, thereby preventing staining of the printing paper sheet 18 which would be caused by the ink droplet 21 deposited on the head surface 1b.

Landscapes

  • Ink Jet (AREA)
EP90307799A 1989-07-18 1990-07-17 Gerät zur Verwendung in einem Tintenstrahldrucker Withdrawn EP0409558A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP18482989 1989-07-18
JP184829/89 1989-07-18

Publications (1)

Publication Number Publication Date
EP0409558A1 true EP0409558A1 (de) 1991-01-23

Family

ID=16160029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90307799A Withdrawn EP0409558A1 (de) 1989-07-18 1990-07-17 Gerät zur Verwendung in einem Tintenstrahldrucker

Country Status (1)

Country Link
EP (1) EP0409558A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0510894A3 (en) * 1991-04-22 1993-07-14 Canon Kabushiki Kaisha Ink jet apparatus with recovery mechanism
EP0576033A3 (de) * 1992-06-26 1994-03-30 Seiko Epson Corp
US6019450A (en) * 1993-03-11 2000-02-01 Seiko Epson Corporation Ink jet recording apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339031A1 (de) * 1982-11-04 1984-05-10 Sharp K.K., Osaka Tintenstrahldrucker
DE3503080A1 (de) * 1984-01-31 1985-08-08 Canon K.K., Tokio/Tokyo Abdeckeinrichtung fuer einen fluessigkeitsstrahl-schreibkopf
EP0314513A2 (de) * 1987-10-30 1989-05-03 Canon Kabushiki Kaisha Tintenstrahlschreiber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339031A1 (de) * 1982-11-04 1984-05-10 Sharp K.K., Osaka Tintenstrahldrucker
DE3503080A1 (de) * 1984-01-31 1985-08-08 Canon K.K., Tokio/Tokyo Abdeckeinrichtung fuer einen fluessigkeitsstrahl-schreibkopf
EP0314513A2 (de) * 1987-10-30 1989-05-03 Canon Kabushiki Kaisha Tintenstrahlschreiber

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0510894A3 (en) * 1991-04-22 1993-07-14 Canon Kabushiki Kaisha Ink jet apparatus with recovery mechanism
US5381169A (en) * 1991-04-22 1995-01-10 Canon Kabushiki Kaisha Ink jet apparatus with recovery mechanism
EP0576033A3 (de) * 1992-06-26 1994-03-30 Seiko Epson Corp
US5699092A (en) * 1992-06-26 1997-12-16 Seiko Epson Corporation Ink-jet recording device
US6019450A (en) * 1993-03-11 2000-02-01 Seiko Epson Corporation Ink jet recording apparatus

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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