EP0482775A1 - Tintenstrahlaufzeichnungsgerät - Google Patents

Tintenstrahlaufzeichnungsgerät Download PDF

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Publication number
EP0482775A1
EP0482775A1 EP91308945A EP91308945A EP0482775A1 EP 0482775 A1 EP0482775 A1 EP 0482775A1 EP 91308945 A EP91308945 A EP 91308945A EP 91308945 A EP91308945 A EP 91308945A EP 0482775 A1 EP0482775 A1 EP 0482775A1
Authority
EP
European Patent Office
Prior art keywords
ink
recording
recording head
ink jet
recording heads
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
EP91308945A
Other languages
English (en)
French (fr)
Other versions
EP0482775B1 (de
Inventor
Koji C/O Canon Kabushiki Kaisha Terasawa
Katsuyuki C/O Canon Kabushiki Kaisha Yokoi
Makoto C/O Canon Kabushiki Kaisha Takemura
Hideo C/O Canon Kabushiki Kaisha Fukazawa
Tetsuji c/o Canon Kabushiki Kaisha Kurata
Koichiro c/o Canon Kabushiki Kaisha Kawaguchi
Kazuhiko c/o Canon Kabushiki Kaisha Shinoda
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Publication of EP0482775A1 publication Critical patent/EP0482775A1/de
Application granted granted Critical
Publication of EP0482775B1 publication Critical patent/EP0482775B1/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
    • 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
    • B41J2/1652—Cleaning of print head nozzles by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head
    • B41J2/16523—Waste ink transport from caps or spittoons, e.g. by suction

Definitions

  • the present invention relates to an ink jet recording apparatus, and particularly, to an ink jet recording apparatus used as an information recording apparatus for an electronic typewriter, a word processor, a facsimile, a copying machine and so on.
  • a fed out paper tray 2009 is installed so as to be removable from the apparatus.
  • the fed out paper tray 2009 is provided on a back side of the apparatus at a predetermined angle so that the recorded papers may be stacked sequentially over the feed out paper tray 2009.
  • An operation part 2011 is provided on the one of the main cases 20001.
  • the operation part 2011 has a display part 2011B for displaying information of operation states of the apparatus and a key 2011A for accepting command inputs to the apparatus.
  • Figs. 2A and 2B are a cross-sectional side view and a plan view of the ink jet recording apparatus in one embodiment of the present invention, showing the apparatus without its apparatus cover.
  • the recording head, a carriage on which the recording head is mounted and which can move, and a driving system for moving the carriage are not shown.
  • a recording head part 1 has four recording head chips, each corresponding to an individual ink color to be described in detail in Fig. 3. These recording head chip is mounted in a carriage body 201 of a carriage part 200 so as to be detached easily.
  • a component 203 is a carriage cover and a component 205 is a head cover. These covers are mounted in the carriage body 201 so that electric connections to the recording head chips and positioning and mounting of the recording head chips are established.
  • An intermediate tank 300 mounted at a part of the carriage body 201 collects bubbles generated in the ink supply system and cushions the pressure deviation occurring in the ink supply system due to the movement of the carriage.
  • an abnormal handling status of the apparatus is alarmed by a sound apparatus like a buzzer in such cases that an excess amount of vibration is applied to the apparatus in transporting the apparatus and that the position of the position lever 211 is not position III, that is, not in the proper position for fixing the carriage part 200 in detecting application of the excess amount of vibration force to the apparatus.
  • Each pair of the datum faces 205B to 205D and the springs 221 also support the end parts of the head chips 10B to 10D between each pair of them, respectively. Therefore, in fabricating the carriage body 201, by controlling the tolerance in determining the distances between datum faces, 217A and 201A, 217A and 217B, 217A and 217C, and 217A and 217D, and in fabricating the head cover 205, by controlling the tolerance in determining the distances between datum surfaces, 205A and 205B, 205A and 205C, and 205A and 205D, the relative gradient between every pair of the head chips 10A to 10D may be maintained to be deviated within a required allowance value.
  • the valve unit 559 has a valve body 565 which can open and close the ink leading ports from the cap and the intermediate tank, and a coil spring 567 for pushing the valve body 565 in the direction for closing the valve body 565.
  • the piston 557 has a piston shaft 557A in a part of which an ink fluid route 556 is formed, a valve 571 and a flange 573 mounted on the piston shaft 557A, and a roller 570 which is disposed between the valve 571 and the flange 573 with being mounted to the piston shaft 557A loosely and has an ink fluid route 570A.
  • the cylinder head 555 has a seal ring 555A and is mounted in the cylinder body 551 in the same manner as the cylinder head 553.
  • a pump with an unnecessarily large power may be used and the excess amount of ink is sucked from the recording head chip which consumes the relatively small amount of ink to be required to be sucked for recovering the ink ejection.
  • the power of each pump is determined to be a suitable value in accordance with the necessary amount of ink to be sucked, and therefore, the disadvantageous aspect of the case in using a single pump may be avoided.
  • phase of the cams of each pair is not determined to be identical to each other, and that the cams and the levers are installed with respect to an individual pump 400 and driven in the different phases.
  • This structure is favorable from the viewpoint of distributing the pump load suitably over four pumps.
  • each of components 800 is an unit for detecting the amount of ink in the ink tank 701, which is placed between the ink supply tube 703 and the ink reservoir part formed in the ink tank 701.
  • Components 707 are a set of cables which are wired for the ink amount detecting unit 800 and wired for detecting the mounting of the ink tank 701 on the apparatus.
  • a component 709 is a connector part for the cables 707.
  • Vertical penetration holes 813 are formed at the four corners of the lock member 809, and a notch part 813A is formed above and outside the vertical penetration hole 813.
  • the lock member 811 is made of elastic materials, and a clutch part 811A is formed outside the top part of the lock member 811. The upper face of the clutch part 811A is tapered.
  • the peripheral part of the upper face of the support member 815 which is pressed upward by the coil spring 823, contacts with the bottom face of the top end part of a pair of contacting members 829 and 831, and the electric contact is established between the support member 815 and the contacting members 829 and 831.
  • the distance between the spring stopper ring 825 and the spring holder 821A can be maintained to be constant, and the reactive force produced by the compressed coil spring 823 can be also maintained to be within a predetermined range of force.
  • the diaphragm 807 moves in response to the pressure drop of the ink in the ink fluid route 803 and this movement makes the support member 815 opens the electric contact between the contacting members 829 and 831.
  • the ink pressure in the ink fluid route 861 decreases under a predetermined value
  • the diaphragm 865 pushes downward the support member 867.
  • the ink pressure threshold detected as an establishment of the electric contact between the contacting members 875 and 877 can be determined by the reactive force produced by the coil spring 873.
  • the adjustment of the coil spring 873 in order to determine the ink pressure threshold is, however, rather difficult at the time of fabrication. More specifically, as rotating operation of the adjuster ring 871 by hand is not define so precisely that the pressure to be detected is defined inevitably to be discontinuous values. The maintenance operator of the apparatus may feel difficulty in adjusting finely the adjuster ring 871 within designated and exact positions corresponding to the pressure to be detected within 65 ⁇ 5 mmaq as shown in Fig. 27, in which illustrated is the relation between the mass amount of the ink in the ink tank and the detected pressure in the ink fluid route.
  • Fig. 30 is a cross-sectional side view of the ink supply tube connection part.
  • the operation part 929 and the protruding part 931 is disposed on the back side of the joint 921, and a protection part 943 for avoiding erroneous connection operations is integrally formed with the operation part 929.
  • a coupling part 941 which does not intersect with the protection part 983 when the joint 921 is properly coupled with the joint 901 and which intersects with the protection part 983 in order to avoid the erroneous operation in which the joint 921 is coupled with its back side up when trying to insert the joint 921 with its back side up.
  • the protection part 983 may be allowed to be disposed on the side of the apparatus frame 900, or to be formed by extending the protruding part 931 into the frame part 900 and mounting the protruding part 931, on the frame part 900.
  • the ink supply tube can be connected from the ink tank to the recording head with an easier operation without an erroneous operation for coupling the joints, and in addition, it will be appreciated that the joint 921 can be easily separated from the joint 901 only by manipulating the operation part 929 at the state shown in Fig. 29B in order to cancel the coupled state between the latch part 927 and the lock part 907.
  • the easiness in separating the ink supply tubes from the recording head side further brings an advantage for maintaining the apparatus.
  • in separating the ink supply tubes with the joint 921 from the joint 901 as the valve 905 is closed as shown in Fig. 29A, it will be appreciated that ink leakage from the recording head side can be prevented.
  • the present invention can be also applied to a so-called full-line type recording head whose length equals the maximum length across a recording medium.
  • a recording head may consists of a plurality of recording heads combined together, or one integrally arranged recording head.
  • Fig. 33 schematically illustrates another embodiment of a portable printer in accordance with the present invention to which a utilizing apparatus such as a work station, a personal or host computer, a word processor, a copying machine, a facsimile machine or an optical disc apparatus can be coupled.
  • a utilizing apparatus such as a work station, a personal or host computer, a word processor, a copying machine, a facsimile machine or an optical disc apparatus can be coupled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ink Jet (AREA)
EP19910308945 1990-10-03 1991-09-30 Tintenstrahlaufzeichnungsgerät Expired - Lifetime EP0482775B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP26689190 1990-10-03
JP26689090 1990-10-03
JP266891/90 1990-10-03
JP266890/90 1990-10-03

Publications (2)

Publication Number Publication Date
EP0482775A1 true EP0482775A1 (de) 1992-04-29
EP0482775B1 EP0482775B1 (de) 1996-04-10

Family

ID=26547636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910308945 Expired - Lifetime EP0482775B1 (de) 1990-10-03 1991-09-30 Tintenstrahlaufzeichnungsgerät

Country Status (2)

Country Link
EP (1) EP0482775B1 (de)
DE (1) DE69118647T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024441A (en) * 1994-03-09 2000-02-15 Canon Kabushiki Kaisha Image forming apparatus
EP1090765A1 (de) * 1998-07-03 2001-04-11 Nec Corporation Tintenstrahldrucker
US6733317B2 (en) 2002-02-28 2004-05-11 Canon Kabushiki Kaisha Recording apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853717A (en) * 1987-10-23 1989-08-01 Hewlett-Packard Company Service station for ink-jet printer
US4952947A (en) * 1987-11-17 1990-08-28 Canon Kabushiki Kaisha Ink discharge recovery device having at least one suction-applying conduit located at a particular position in a capping member and an ink jet recording apparatus incorporating the device
EP0398347A2 (de) * 1989-05-18 1990-11-22 Canon Kabushiki Kaisha Tintenstrahlaufzeichnungsgerät
WO1991010569A1 (de) * 1990-01-09 1991-07-25 Siemens Aktiengesellschaft Tintendruckeinrichtung mit einer reinigungs- und dichtstation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853717A (en) * 1987-10-23 1989-08-01 Hewlett-Packard Company Service station for ink-jet printer
US4952947A (en) * 1987-11-17 1990-08-28 Canon Kabushiki Kaisha Ink discharge recovery device having at least one suction-applying conduit located at a particular position in a capping member and an ink jet recording apparatus incorporating the device
EP0398347A2 (de) * 1989-05-18 1990-11-22 Canon Kabushiki Kaisha Tintenstrahlaufzeichnungsgerät
WO1991010569A1 (de) * 1990-01-09 1991-07-25 Siemens Aktiengesellschaft Tintendruckeinrichtung mit einer reinigungs- und dichtstation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024441A (en) * 1994-03-09 2000-02-15 Canon Kabushiki Kaisha Image forming apparatus
EP1090765A1 (de) * 1998-07-03 2001-04-11 Nec Corporation Tintenstrahldrucker
US6733317B2 (en) 2002-02-28 2004-05-11 Canon Kabushiki Kaisha Recording apparatus

Also Published As

Publication number Publication date
DE69118647D1 (de) 1996-05-15
EP0482775B1 (de) 1996-04-10
DE69118647T2 (de) 1996-10-17

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