SII Printek Inc.

Japan

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IPC Class
B41J 2/175 - Ink supply systems 11
B41J 2/18 - Ink recirculation systems 8
B41J 2/185 - Ink-collectors; Ink-catchers 8
B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers 6
B41J 2/055 - Devices for absorbing or preventing back-pressure 6
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Found results for  patents

1.

LIQUID INJECTION HEAD, LIQUID INJECTION RECORDING DEVICE, AND USAGE OF LIQUID INJECTION RECORDING DEVICE

      
Application Number JP2010054187
Publication Number 2010/106970
Status In Force
Filing Date 2010-03-12
Publication Date 2010-09-23
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Kayama, Ayako

Abstract

Provided are a liquid injection head, a liquid injection recording device, and a usage of liquid injection recording device capable of performing initial filling of liquid without moving to a service station, etc., by improving the ability to recover surplus liquid. A nozzle guard (24) formed to cover a nozzle array is provided. The nozzle guard (24) comprises a peripheral wall portion (24b) surrounding the periphery of the nozzle array, a top panel portion (24a) extending from a peripheral edge of the peripheral wall portion (24b) along a nozzle plate (31) and comprising a slit (24c) which is opposed to the nozzle array, and a suction flow channel (15) which is communicated with an inner space (S) of the nozzle guard (24), and is connected with a suction pump for suctioning surplus liquid (Y) leaking from the nozzle array, wherein a suction port (15a) of the suction flow channel (15) is arranged lower than the nozzle array in the direction of gravitational force.

IPC Classes  ?

2.

LIQUID JETTING HEAD, LIQUID JETTING RECORDING DEVICE AND METHOD FOR FILLING LIQUID JETTING HEAD WITH LIQUID

      
Application Number JP2010053033
Publication Number 2010/103937
Status In Force
Filing Date 2010-02-26
Publication Date 2010-09-16
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Kayama, Ayako

Abstract

Provided are a liquid jetting head having improved performance of recovering an excessive ink, a liquid jetting recording device, and a method for filling the liquid jetting head with a liquid. The liquid jetting head is provided with: a jetting body (23) having a jetting port row (31c) composed of a plurality of jetting ports (31a); a plurality of pressure generating chambers (26) connected to the jetting ports; a liquid supply system which supplies the pressure generating chambers with the liquid; an actuator (21) disposed adjacent to the pressure generating chambers; and a jetting body guard (24), which is disposed by being spaced part from the surface (32f) of the jetting body and has a top plate section (24a) on which a slit (24c) that faces the jetting port row is formed. In the liquid jetting head, the jetting port row is disposed in the perpendicular direction, the inside of the pressure generating chambers is pressurized by driving the actuator, and the liquid in the pressure generating chambers is jetted in the horizontal direction from the jetting ports. Guide sections (40) are provided on the side of the jetting port row such that the liquid overflowed from the jetting ports is guided downward in the gravity direction toward the further side from the jetting ports.

IPC Classes  ?

  • B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
  • B41J 2/055 - Devices for absorbing or preventing back-pressure
  • B41J 2/175 - Ink supply systems

3.

PRESSURE BUFFER, LIQUID JETTING HEAD, LIQUID JETTING RECORDING DEVICE, AND METHOD FOR BUFFERING PRESSURE

      
Application Number JP2010053276
Publication Number 2010/101124
Status In Force
Filing Date 2010-03-01
Publication Date 2010-09-10
Owner SII PRINTEK INC. (Japan)
Inventor
  • Watanabe, Toshiaki
  • Saga, Yukihiro

Abstract

Provided are a pressure buffer, which can control pressure by accurately detecting the pressure irrespective of liquid type, a liquid jetting head, and a liquid jetting recording device. The pressure buffer is provided with: a main body section (91) wherein a recessed section (91a) for storing a liquid and pipe lines (93, 94) opened to the recessed section (91a) are formed; a thin film (96), which is arranged so as to hermetically close the recessed section (91a) and is fixed to the main body section (91) on the peripheral section (91c) of the recessed section (91a); a reference member (97) which can be in contact with or separated from the thin film (96) and is arranged inside of the recessed section (91a); and a displacement quantity detecting means having a loop coil section (99) which detects the displacement of the relative position of the reference member (97) due to the pressure change of the liquid stored in the recessed section (91a) without contact with the reference member (97).

IPC Classes  ?

4.

CARRIAGE UNIT, LIQUID DISCHARGE RECORDING DEVICE, AND METHOD OF FASTENING LIQUID DISCHARGE HEAD

      
Application Number JP2010052561
Publication Number 2010/101034
Status In Force
Filing Date 2010-02-19
Publication Date 2010-09-10
Owner SII PRINTEK INC. (Japan)
Inventor
  • Murase, Tetsuya
  • Sadaki, Akihiro

Abstract

Provided are a carriage unit configured in such a manner that a liquid discharge head can be positioned relative to a carriage with increased accuracy, a liquid discharge recording device, and a method of fastening a liquid discharge head. A carriage unit (62) provided with a liquid discharge head (4) and a carriage (68) which moves relative to and parallel with the recording surface of a medium on which recording is to be performed. The carriage is provided with a head support member (82) in which a guide groove (95) is formed, and also with a slide member (81) on which pins (88, 89) which can move along the guide groove are formed. When the slide member is moved in the longitudinal direction, the liquid discharge head is positioned relative to the carriage in the longitudinal direction. Also, when the pins are moved along the guide groove, a first pressing member (102) is caused to press the liquid discharge head to thereby position the liquid discharge head relative to the lateral direction, and second pressing members (92, 103) are also caused to press the liquid discharge head to thereby position the liquid discharge head relative to the height direction. Thus, the liquid discharge head is fastened relative to the carriage.

IPC Classes  ?

  • B41J 2/01 - Ink jet
  • B41J 25/304 - Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface

5.

LIQUID JETTING HEAD, LIQUID JETTING RECORDING DEVICE, AND METHOD FOR USING LIQUID JETTING RECORDING DEVICE

      
Application Number JP2010053031
Publication Number 2010/101075
Status In Force
Filing Date 2010-02-26
Publication Date 2010-09-10
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Kayama, Ayako

Abstract

Provided is a liquid jetting head which can be initially filled with a liquid without a move to a service station or the like even when the opening direction of a jetting port is in the gravitational direction, by improving the recovery performance of a surplus liquid. A liquid jetting recording device and a method for using the liquid jetting recording device are also provided. A pair of suction channels (60) are provided on the both ends in the arrangement direction of nozzle ports (31a), and the suction ports (60a) of the suction channels (60) abut on the top panel section of a nozzle guard.

IPC Classes  ?

  • B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
  • B41J 2/055 - Devices for absorbing or preventing back-pressure
  • B41J 2/175 - Ink supply systems

6.

CARRIAGE UNIT, LIQUID DISCHARGE RECORDING DEVICE, AND METHOD OF USING CARRIAGE UNIT

      
Application Number JP2010053034
Publication Number 2010/101076
Status In Force
Filing Date 2010-02-26
Publication Date 2010-09-10
Owner SII PRINTEK INC. (Japan)
Inventor
  • Murase, Tetsuya
  • Sadaki, Akihiro

Abstract

A carriage unit (3) configured in such a manner that a liquid discharge head (10) can be easily maintained and can be easily positioned relative to a carriage (4). A movement mechanism (5) moves the liquid discharge head (10) between a first position at which the liquid discharge head (10) is maintained with a discharge hole directed horizontally and a third position at which the liquid discharge head (10) is positioned to the carriage (4) with the discharge hole directed toward a recording surface, and the movement mechanism (5) also moves, immediately before the liquid discharge head (10) reaches the third position, the liquid discharge head (10) in the XY-direction to position the liquid discharge head (10) in the XY-direction relative to the carriage (4). After that, a holding lever (130) is rotated to position the liquid discharge head (10) relative to the carriage (4) in the Z-direction.

IPC Classes  ?

7.

LIQUID JETTING HEAD, LIQUID JETTING RECORDING DEVICE AND METHOD FOR REFILLING LIQUID JETTING HEAD WITH LIQUID

      
Application Number JP2009070197
Publication Number 2010/079654
Status In Force
Filing Date 2009-12-01
Publication Date 2010-07-15
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Kayama, Ayako

Abstract

Provided are a liquid jetting head wherein contamination due to an excess liquid is eliminated and liquid jetting after refilling a liquid is stabilized by improving performance of recovering the excess liquid, and a liquid jetting recording device.  The liquid jetting head is provided with: a nozzle guard (24) which covers the circumference of a nozzle row (31c) and has a slit (24c) formed to face the nozzle row (31c); and a suction channel (15) wherein a suction pump which sucks the excess ink leaked out from the nozzle row (31c) is connected thereto.  The space inside of the nozzle guard (24) is partitioned into a first space (S1) and a second space (S2), and the first space (S1) and the second space (S2) are connected by means of a connecting hole group (31f) formed in the nozzle plate (31).

IPC Classes  ?

  • B41J 2/18 - Ink recirculation systems
  • B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
  • B41J 2/055 - Devices for absorbing or preventing back-pressure
  • B41J 2/185 - Ink-collectors; Ink-catchers

8.

DEVICE FOR ROTATING LIQUID JETTING HEAD, LIQUID JETTING RECORDING DEVICE, AND METHOD FOR FILLING LIQUID JETTING RECORDING DEVICE WITH LIQUID

      
Application Number JP2009070586
Publication Number 2010/071058
Status In Force
Filing Date 2009-12-09
Publication Date 2010-06-24
Owner SII PRINTEK INC. (Japan)
Inventor
  • Murase, Tetsuya
  • Sadaki, Akihiro

Abstract

Provided are a device for rotating a liquid jetting head wherein the configuration is simplified and manufacturing cost is reduced, while maintaining printing accuracy, a liquid jetting recording device and a method for filling the liquid jetting recording device with a liquid.  A rotating device (60) is provided with a rotating unit (62) having an inkjet head (10) attached thereto, and a base unit (61) which rotatably supports the rotating unit (62).  The rotating unit (62) is provided with a rotating plate (63) which is rotatably supported to the base unit (61) by means of a rotating shaft (69), and a sliding mechanism (65), which is slidably supported in the radius direction of the rotating shaft (69) with respect to the rotating plate (63) and has the inkjet head (10) attached thereto.  The sliding mechanism (65) is formed to slide on the rotating plate (63) with the rotation of the rotating plate (63).

IPC Classes  ?

9.

LIQUID JETTING HEAD, LIQUID JETTING RECORDING APPARATUS, AND METHOD FOR FILLING LIQUID JETTING HEAD WITH LIQUID

      
Application Number JP2009067916
Publication Number 2010/070975
Status In Force
Filing Date 2009-10-16
Publication Date 2010-06-24
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Kayama, Ayako

Abstract

The space factor of a liquid jetting head is improved, and the degree of freedom in designing a liquid jetting recording apparatus is improved.  Performance of recovering a surplus liquid is improved with a simple configuration, contamination due to the surplus liquid is eliminated, the liquid jetting recording apparatus is initially filled, and liquid jetting after the liquid filling is stabilized. The liquid jetting head is provided with: a wall section (24), which surrounds the periphery of a jetting port row and protrudes in the same direction as the opening direction of a jetting port; an opening/closing mechanism (60), which has a cover member (62) that can open/close an opening section (24n) formed by the wall section (24), configures a closed space between the wall section (24) and the jetting body (23) in the closed state, and exposes the jetting port to the outside in the opened state; an absorber (40), which is provided on a rear surface (62b) of the cover member (62) and absorbs the liquid spilled out from the jetting port; a suction channel (15), which has a suction port (15a) opened to the closed space and is connected to an external suction apparatus (8); and a section (33) opened to atmosphere, which can perform switching between opening and blocking of the closed space to and from the outside.

IPC Classes  ?

  • B41J 2/175 - Ink supply systems
  • B41J 2/165 - Prevention of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
  • B41J 2/18 - Ink recirculation systems
  • B41J 2/185 - Ink-collectors; Ink-catchers

10.

CARRIAGE UNIT, LIQUID EJECTION RECORDING DEVICE, AND METHOD OF AFFIXING CARRIAGE UNIT

      
Application Number JP2009070048
Publication Number 2010/064587
Status In Force
Filing Date 2009-11-27
Publication Date 2010-06-10
Owner SII PRINTEK INC. (Japan)
Inventor Murase, Tetsuya

Abstract

A carriage unit, wherein a liquid ejection head (4) can be easily mounted to and removed from a carriage (62a) and the liquid ejection head (4) can be positioned to the carriage (62a) at high accuracy.  The carriage unit is provided with the liquid ejection head (4) having arranged therein ejection holes for ejecting a liquid to the recording surface of a medium on which recording is made, and also with the carriage (62a) moving relative and parallel to the recording surface with the liquid ejection head (4) affixed in position.  The carriage unit is also provided with a lever (80) rotated and engaged with the carriage (62a) to removably affix the liquid ejection head (4) to the carriage (62a).  The liquid ejection head (4) is positioned to the carriage (62a) in each direction according to rotational operation and engaging operation of the lever (80).

IPC Classes  ?

11.

LIQUID JETTING HEAD AND LIQUID JETTING APPARATUS

      
Application Number JP2009069623
Publication Number 2010/064542
Status In Force
Filing Date 2009-11-19
Publication Date 2010-06-10
Owner SII PRINTEK INC. (Japan)
Inventor
  • Saga, Yukihiro
  • Watanabe, Toshiaki

Abstract

Cost is reduced by improving production efficiency.  A liquid jetting head is provided with: a head chip (21) wherein a plurality of channels are formed in parallel at intervals, drive electrodes are formed on the side walls of the channels, and nozzle holes connected to the channels are formed; a temperature sensor (50) which is arranged on the head chip (21) or in the vicinity thereof and detects the temperature of a liquid in the head chip (21); and a control means (23), which is provided with a flexible printed board (27) having thereon a drive circuit board (26) with a drive circuit (25) mounted thereon and a signal line (28), and also with a drive voltage setting means (60) which determines the level of a drive voltage based on the detection value of the temperature sensor (50), and applies the drive voltage determined by the drive voltage setting means (60) from the drive circuit (25) through the signal line (28).  A connecting wiring line (29) which electrically connects the temperature sensor (50) with the drive voltage setting means (60) is formed on the flexible printed board (27).

IPC Classes  ?

  • B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
  • B41J 2/01 - Ink jet
  • B41J 2/055 - Devices for absorbing or preventing back-pressure

12.

LIQUID JET HEAD, LIQUID JET RECORDER AND METHOD FOR FILLING LIQUID JET HEAD WITH LIQUID

      
Application Number JP2009064569
Publication Number 2010/052964
Status In Force
Filing Date 2009-08-20
Publication Date 2010-05-14
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Kayama, Ayako
  • Watanabe, Toshiaki

Abstract

To enhance a degree of freedom in design of a liquid jet recorder by improving the space factor of a liquid jet head. To prevent pollution caused by excess liquid and to attain an initial filling into a liquid jet recorder by improving an ability to collect excess liquid with simple configuration, and liquid jet is stabilized after the liquid filling. A liquid jet head characterized by comprising an open/close mechanism (60) which opens a wall portion opening (24n) in an open state to expose a nozzle hole to the outside, and closes the wall portion opening (24n) in a closed state to constitute a closed space between the wall portion (24) and a nozzle plate (31), a suction channel (15) which has one end side that opens as a suction port (15a) below a nozzle array and the other end side that is connected with a suction pump (16), which turns the closed space to a negative pressure chamber (R) by evacuating the closed space by means of the suction pump (16), and which supplies ink (I) from the ink tank of ink (I) to the nozzle hole, and an atmosphere release channel (33) which can switch between the closed space opend to the outside and that closed thereto.

IPC Classes  ?

  • B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
  • B41J 2/055 - Devices for absorbing or preventing back-pressure
  • B41J 2/18 - Ink recirculation systems
  • B41J 2/185 - Ink-collectors; Ink-catchers

13.

LIQUID JETTING HEAD, METHOD OF CHARGING LIQUID FOR LIQUID JETTING HEAD, LIQUID JETTING RECORDING DEVICE, AND METHOD OF USING SAME

      
Application Number JP2009064483
Publication Number 2010/041519
Status In Force
Filing Date 2009-08-19
Publication Date 2010-04-15
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Kayama, Ayako

Abstract

The flexibility of design of a liquid jetting recording device is increased by improving the space factor of a liquid jetting head. Contamination by excessive liquid is prevented from occurring and the jetting of liquid after charging is stabilized by increasing an excess liquid collecting capacity. The liquid jetting head is characterized by comprising a nozzle guard (24) so formed as to cover a nozzle plate (31) and characterized in that the nozzle guard (24) comprises a top plate section (24a) disposed apart from the surface of the nozzle plate (31) and having a slit (24c) so formed as to face a nozzle row (31c) and an enclosing part (24) enclosing between the peripheral edge of the top plate part (24a) and the nozzle plate (31) and an absorber (60) for absorbing the excess ink (Y) overflowing from the nozzle hole (31a) is disposed between the top plate part (24a) of the nozzle guard (24) and the nozzle plate (31).

IPC Classes  ?

  • B41J 2/18 - Ink recirculation systems
  • B41J 2/045 - Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
  • B41J 2/055 - Devices for absorbing or preventing back-pressure
  • B41J 2/175 - Ink supply systems
  • B41J 2/185 - Ink-collectors; Ink-catchers

14.

LIQUID EJECTION RECORDING DEVICE AND LIQUID EJECTION RECORDING METHOD

      
Application Number JP2009063520
Publication Number 2010/024085
Status In Force
Filing Date 2009-07-29
Publication Date 2010-03-04
Owner
  • SII PRINTEK INC. (Japan)
  • Roland DG Corporation (Japan)
Inventor
  • Iwase, Fumiyoshi
  • Murase, Tetsuya
  • Toda, Masatoshi

Abstract

Provided are a liquid ejection recording device having a simplified structure for regulating the pressure of a liquid to be supplied to an ejection opening, and a liquid ejection recording method. A liquid ejection recording device is provided with a liquid containing body (5) for containing a liquid (5a), an ejection section (17) located at a higher position than the level of the liquid (5a) contained in the liquid containing body (5), a liquid pipe path (6) mounted between the ejection section (17) and the liquid containing body (5), a roller tube pump (7) capable of being switched to either a state in which the roller tube pump is located at an intermediate section of the liquid pipe path (6) and presses and moves the liquid (5a) to the ejection section (17) side or to the liquid containing body (5) side by pressing the liquid pipe path (6) or a state in which the pressing of the liquid pipe path (6) is cancelled to set the inside of the liquid flow path to a flow-through state, a liquid containing section (26) mounted in that portion of the liquid pipe path (6) which is between the ejection section (17) and the roller tube pump (7), a pressure sensor (22) mounted in that portion of the liquid flow pipe (6) which is between the ejection section (17) and the liquid containing section (26), and a control section (11) for controlling drive of the roller tube pump (7) based on a pressure value (P1) measured by the pressure sensor (22).

IPC Classes  ?

15.

LIQUID EJECTION HEAD, CARRIAGE UNIT, PRESSURE CONTROL METHOD, AND LIQUID EJECTION RECORDING DEVICE

      
Application Number JP2009063519
Publication Number 2010/024084
Status In Force
Filing Date 2009-07-29
Publication Date 2010-03-04
Owner
  • SII PRINTEK INC. (Japan)
  • Roland DG Corporation (Japan)
Inventor
  • Iwase, Fumiyoshi
  • Murase, Tetsuya
  • Toda, Masatoshi

Abstract

Provided are a liquid ejection head which increases or decreases the pressure of a liquid to an optimum value by accurately measuring the pressure of the liquid when the liquid is ejected from an ejection opening, a carriage unit, a pressure control method, and a liquid ejection recording device. A liquid ejection head is provided with an ejection section (17) having ejection openings for ejecting a liquid (5a), a liquid containing unit (15) mounted in a pipe path (6) which supplies the liquid (5a) in a liquid containing body (5) to the ejection section (17) through a roller tube pump (7) and buffering a variation in the pressure in the pipe path (6), and a pressure sensor (22) which is a pressure measuring means mounted in the pipe path (6), which pipe path interconnects the liquid containing unit (15) and the ejection section (17), and measuring the pressure in the pipe path (6).  The liquid ejection head drives and controls the roller tube pump (7) based on the value measured by the pressure sensor (22) so that the pressure of the liquid (5a) supplied from the pipe path (6) to the ejection section (17) is within a predetermined range.

IPC Classes  ?

16.

LIQUID EJECTING HEAD, LIQUID EJECTING RECORDING DEVICE, AND LIQUID CHARGING METHOD FOR LIQUID EJECTING HEAD

      
Application Number JP2009059205
Publication Number 2009/147944
Status In Force
Filing Date 2009-05-19
Publication Date 2009-12-10
Owner SII PRINTEK INC. (Japan)
Inventor
  • Sakata, Akifumi
  • Tominaga, Kazuyoshi
  • Watanabe, Toshiaki
  • Toda, Masatoshi
  • Sadaki, Akihiro

Abstract

A liquid ejecting head (10) provided with a nozzle body (23) having a nozzle row (31c) composed of nozzle holes (31a) comprises a nozzle guard (24) formed so as to cover the nozzle row (31c).  The nozzle guard (24) is provided with a top plate section (24a) located spaced from the surface of the nozzle body (23) and having formed therein a slit (24c) opposed to the nozzle row (31c), closing sections (24b) for closing between the nozzle body (23) and the peripheral edges of the top plate section (24a), and a suction flow path (15) having a suction opening (15a) open below the nozzle row (23c) and communicating with a space (S) on the inner side of the nozzle guard (24).  A suction section (16) connected to the suction flow path (15) causes the space (S) on the inner side of the nozzle guard (24) to be a negative pressure chamber (R), and a first liquid (Y) overflowing into the negative pressure chamber (R) is sucked from the nozzle hole (15a).

IPC Classes  ?

17.

TUBE PUMP, INK JET RECORDING DEVICE, AND INK FEEDING METHOD

      
Application Number JP2005018077
Publication Number 2006/070518
Status In Force
Filing Date 2005-09-30
Publication Date 2006-07-06
Owner
  • SII PRINTEK INC. (Japan)
  • ROLAND DG CORPORATION (Japan)
Inventor
  • Kubota, Yuzuru
  • Iwase, Fumiyoshi

Abstract

A tube pump, an ink jet recording device using the tube pump, and an ink feeding method. The tube pump comprises an elastic tube (14), a circular arc-shaped guide member (16) guiding the tube (14), and at least one pressing member (15) pressing the tube (14) against the guide member (16). The tube pump is characterized in that a recessed portion (17) allowing the tube (14) to come therein without being pressed by the pressing member (15) is formed in a part of the guide member (16). Thus, since a negative pressure in an ink feed passage (7) is relieved when a main tank (5) is replaced, the entry of air into the ink feed passage (7) can be easy avoided.

IPC Classes  ?

  • F04C 5/00 - Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
  • B41J 2/175 - Ink supply systems