CA1220377A - Ink liquid supply system in an ink jet system printer of the charge amplitude controlling type - Google Patents
Ink liquid supply system in an ink jet system printer of the charge amplitude controlling typeInfo
- Publication number
- CA1220377A CA1220377A CA000431844A CA431844A CA1220377A CA 1220377 A CA1220377 A CA 1220377A CA 000431844 A CA000431844 A CA 000431844A CA 431844 A CA431844 A CA 431844A CA 1220377 A CA1220377 A CA 1220377A
- Authority
- CA
- Canada
- Prior art keywords
- ink liquid
- printer head
- ink
- printer
- pump
- 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.)
- Expired
Links
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
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
- B41J2/17596—Ink pumps, ink valves
Landscapes
- Ink Jet (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Reciprocating Pumps (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type includes a pump system for supplying liquid ink from an ink reservoir to a nozzle. The pump system has a cylindrically-shaped wall defining a pump chamber, and a piezo element attached to the outer surface of the cylindrically-shaped wall. When a pulse-shaped drive signal is applied to the piezo element, the volume of the pump chamber is varied to achieve the pump function.
A liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type includes a pump system for supplying liquid ink from an ink reservoir to a nozzle. The pump system has a cylindrically-shaped wall defining a pump chamber, and a piezo element attached to the outer surface of the cylindrically-shaped wall. When a pulse-shaped drive signal is applied to the piezo element, the volume of the pump chamber is varied to achieve the pump function.
Description
The present invention relates to a liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type and, more particularly, to a pump system in an ink jet system printer for supplying liquid ink to a nozzle included in the ink jet system printer.
An ink jet system printer of the charge-amplitude controlling type requires a small amount, constant flow rate pump system in order to ensure stable printing operation when ambient conditions vary.
The conventional liquid in supply system of an ink jet system printer of the charge-amplitude controlling type includes a mechanical plunger pump of the constant flow rate type. However, mechanical plunger pumps do not lo ensure a stable, constant flow rate supply when supply of only a small amount is required. Also, mechanical plunger pumps are relatively large in size.
feature of the present invention is the provision of a novel pump system suited for a liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type.
An aspect of the present invention is the provision of a pump system which ensures a constant flow rate when supply in only a small amount is desired.
The present invention provides an ink liquid supply system for supplying ink liquid from an ink liquid reservoir to a printer head in an ink jet system printer of the charge amplitude controlling type, comprising, a pump system disposed between the ink liquid reservoir and the printer head, the pump system comprising, a pump chamber, and a pus element secured to the pump chamber for varying the volume of the pump chamber in response to a drive signal applied thereto.
also, in accordance with the present invention the vibration pipe is made of hard vinyl chloride resin sheet having a thickness of about I mm.
Other features and aspects of the present invention will become apparent from the detailed y description of one embodiment given hereinafter. It should be understood, however, that the detailed description of this specific embodiment is included by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. The detailed description makes reference to the accompanying drawings which are included by way of illustration only, and in which:
FIGURE 1 is a block diagram of a liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type, and which includes an embodiment of a pump system of the present invention;
FIGURE 2 is a front view (partially in section) lo of the pump system included in the liquid ink supply system of FIGURE l; and FIGURE 3 is a schematic perspective view of a pus vibrator included in the pump system of FIGURE 2.
Referring to FIGURE 1, a liquid ink supply system of an ink jet system printer of the charge-amplitude controlling type includes a cartridge tank 1, removably secured to the liquid ink supply system. The liquid ink supply system includes an ink outlet needle 2 for discharging the ink liquid from the cartridge tank 1, and an ink inlet needle 3 for introducing the ink liquid into the cartridge tank 1. The ink outlet needle 2 and the ink inlet needle 3 are inserted into the cartridge tank 1 when the cartridge tank 1 is secured to the liquid 'SKI
ink supply system.
The ink liquid discharged from the cartridge tank 1 is introduced into a main tank 4. A pump system 6 of the present invention is connected to introduce the ink liquid from the main tank 4 via an ink inlet valve 5. The pump system 6 provides -liquid ink at a constant flow rate to an accumulator 8 through an ink outlet valve 7. The accumulator 8 functions to stabilize the static pressure of the ink liquid supplied from the pump system 6.
The thus stabilized ink liquid is supplied from the accumulator to a printer head 10 via an electron magnetic cross valve 9. us is well known in the art, the printer head 10 includes a nozzle to which an electron mechanical transducer (pus vibrator) is attached in order to emit ink droplets at a given frequency. The printer head 10 further includes a charging tunnel for charging the ink droplets in accordance with a print information signal. The charged ink droplets are deflected when they pass between a pair of deflection electrodes which are also included in the printer head 10. Ink droplets not contributing to the actual printing operation are not charged nor deflected, and are directed to a beam gutter 11. The liquid ink collected by the beam gutter 11 is returned to the cartridge tank 1 via a return conduit 15.
When -the actual printing operation is terminated, the pump system 6 is disabled, and the electromagnetic cross valve 9 is switched to connect the printer head 10 to return conduit lo. The ink liquid disposed between the electromagnetic cross valve 9 and the printer head 10 is forced to flow into the return conduit 15 due to the negative pressure created in return conduit 15. That is, when the printing operation is not conducted, ink liquid does not remain in the nozzle portion of printer head 10.
Ink liquid introduced into return conduit 15 v is returned to the cartridge tank 1 by means of a suction pump 13. Valves 12 and 14 are associated with the suction pump 13.
The pump system 6 and the accumulator 8 are constructed as shown in FIGURE 2. In FIGURE 2, like elements corresponding to those of FIGURE 1 are indicated by like reference numerals.
The pump system 6 includes a pump chamber 20 surrounded by a cylindrically-shaped vibration pipe 22.
At the bottom end of pump chamber 20, a valve seat 25 is provided. An ink inlet pesky 35 is formed through the valve seat 25, and the ink inlet valve 5 is secured to the valve seat 25 through the use of a valve cap I
At the top end of pump chamber 20, another valve seat 21 is provided. An ink outlet passage 36 is formed through the valve seat 21, and the ink outlet valve 7 is secured to valve seat 21 through the use of a valve cap 26. A block housing 37 is secured to valve seat 21 in order to form the accumulator 8. O-shaped rings 30, 31 and 32 are disposed between the valve seat 25 and the vibration pipe 22, between valve sea-t 21 and the vibration pipe 22, and between valve seat 21 and the block housing 37, respectively, for sealing purposes.
A pus element 23 is attached to the cylindrically-shaped vibration pipe 22 through the use of an adhesive. The vibration pipe 22 preferably has a thickness of about 0.2 mm. Accordingly, when a pulse drive signal is applied to the pus en 23, the volume of pump chamber 20 is varied to perfc~ the pump operation.
Referring to Figure 3, assume that the pus element 23 has a radius R and a length Q as shown. When a pulse drive signal is applied to the pus element 23, the pus element 23 expands in the directions shown by the arrows in FIGURE 3. When the pulse drive signal is not applied to the pus element 23, the volume "v"
defined by the pus element 2:3 is expressed as follows:
v = ~R2Q
When the pulse signal is applied to the pus element 23, the radius R and the length Q become R' and Q', I
respectively.
R' = Al K V ) Q' = Al + K V 3 t Accordingly, the volume v is changed to (v TV).
V -I TV = 1rR2Q[l -I TV ) 3 t ~R2Q(l + OK V ) t where:
K : strain constant R : radius of the pus element 23 Q : length of the pus eliminate 23 V : voltage level of the pulse drive signal t : thickness of the pus element 23 TV : volume variation The small amount ink liquid supply is conducted by -the volume variation TV applied to pump chamber 20.
TV = (v + TV) - v = TRUCK t In a specific example, cylindrically-shaped vibration pipe 22 was made of hard vinyl chloride resin, and had a thickness of 0.2 mm. The pus element 23 had a thickness (t) of 1.5 mm, a length (Q) of 40 mm, and a radius I of 13 mm, and was attached to the hard vinyl chloride resin pipe 22 through the use of an epoxy base adhesive. The strain constant K was 300 x 10 12 m/V.
When a pulse drive signal having 700 Up p level was applied to the pus element 2:3, the volume variation A was 8.8 mm3. In a preferred form, the pulse drive signal applied to the pus element 23 has a frequency of 122 Liz.
The invention having been described, it will be apparent that the same may be varied in many ways. Such 35 variations are not to be regrade as departing from the spirit and scope of the invention, and such modifications are in-tended to be included within the scope of the following claims. Jo ;
, . .
An ink jet system printer of the charge-amplitude controlling type requires a small amount, constant flow rate pump system in order to ensure stable printing operation when ambient conditions vary.
The conventional liquid in supply system of an ink jet system printer of the charge-amplitude controlling type includes a mechanical plunger pump of the constant flow rate type. However, mechanical plunger pumps do not lo ensure a stable, constant flow rate supply when supply of only a small amount is required. Also, mechanical plunger pumps are relatively large in size.
feature of the present invention is the provision of a novel pump system suited for a liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type.
An aspect of the present invention is the provision of a pump system which ensures a constant flow rate when supply in only a small amount is desired.
The present invention provides an ink liquid supply system for supplying ink liquid from an ink liquid reservoir to a printer head in an ink jet system printer of the charge amplitude controlling type, comprising, a pump system disposed between the ink liquid reservoir and the printer head, the pump system comprising, a pump chamber, and a pus element secured to the pump chamber for varying the volume of the pump chamber in response to a drive signal applied thereto.
also, in accordance with the present invention the vibration pipe is made of hard vinyl chloride resin sheet having a thickness of about I mm.
Other features and aspects of the present invention will become apparent from the detailed y description of one embodiment given hereinafter. It should be understood, however, that the detailed description of this specific embodiment is included by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. The detailed description makes reference to the accompanying drawings which are included by way of illustration only, and in which:
FIGURE 1 is a block diagram of a liquid ink supply system in an ink jet system printer of the charge-amplitude controlling type, and which includes an embodiment of a pump system of the present invention;
FIGURE 2 is a front view (partially in section) lo of the pump system included in the liquid ink supply system of FIGURE l; and FIGURE 3 is a schematic perspective view of a pus vibrator included in the pump system of FIGURE 2.
Referring to FIGURE 1, a liquid ink supply system of an ink jet system printer of the charge-amplitude controlling type includes a cartridge tank 1, removably secured to the liquid ink supply system. The liquid ink supply system includes an ink outlet needle 2 for discharging the ink liquid from the cartridge tank 1, and an ink inlet needle 3 for introducing the ink liquid into the cartridge tank 1. The ink outlet needle 2 and the ink inlet needle 3 are inserted into the cartridge tank 1 when the cartridge tank 1 is secured to the liquid 'SKI
ink supply system.
The ink liquid discharged from the cartridge tank 1 is introduced into a main tank 4. A pump system 6 of the present invention is connected to introduce the ink liquid from the main tank 4 via an ink inlet valve 5. The pump system 6 provides -liquid ink at a constant flow rate to an accumulator 8 through an ink outlet valve 7. The accumulator 8 functions to stabilize the static pressure of the ink liquid supplied from the pump system 6.
The thus stabilized ink liquid is supplied from the accumulator to a printer head 10 via an electron magnetic cross valve 9. us is well known in the art, the printer head 10 includes a nozzle to which an electron mechanical transducer (pus vibrator) is attached in order to emit ink droplets at a given frequency. The printer head 10 further includes a charging tunnel for charging the ink droplets in accordance with a print information signal. The charged ink droplets are deflected when they pass between a pair of deflection electrodes which are also included in the printer head 10. Ink droplets not contributing to the actual printing operation are not charged nor deflected, and are directed to a beam gutter 11. The liquid ink collected by the beam gutter 11 is returned to the cartridge tank 1 via a return conduit 15.
When -the actual printing operation is terminated, the pump system 6 is disabled, and the electromagnetic cross valve 9 is switched to connect the printer head 10 to return conduit lo. The ink liquid disposed between the electromagnetic cross valve 9 and the printer head 10 is forced to flow into the return conduit 15 due to the negative pressure created in return conduit 15. That is, when the printing operation is not conducted, ink liquid does not remain in the nozzle portion of printer head 10.
Ink liquid introduced into return conduit 15 v is returned to the cartridge tank 1 by means of a suction pump 13. Valves 12 and 14 are associated with the suction pump 13.
The pump system 6 and the accumulator 8 are constructed as shown in FIGURE 2. In FIGURE 2, like elements corresponding to those of FIGURE 1 are indicated by like reference numerals.
The pump system 6 includes a pump chamber 20 surrounded by a cylindrically-shaped vibration pipe 22.
At the bottom end of pump chamber 20, a valve seat 25 is provided. An ink inlet pesky 35 is formed through the valve seat 25, and the ink inlet valve 5 is secured to the valve seat 25 through the use of a valve cap I
At the top end of pump chamber 20, another valve seat 21 is provided. An ink outlet passage 36 is formed through the valve seat 21, and the ink outlet valve 7 is secured to valve seat 21 through the use of a valve cap 26. A block housing 37 is secured to valve seat 21 in order to form the accumulator 8. O-shaped rings 30, 31 and 32 are disposed between the valve seat 25 and the vibration pipe 22, between valve sea-t 21 and the vibration pipe 22, and between valve seat 21 and the block housing 37, respectively, for sealing purposes.
A pus element 23 is attached to the cylindrically-shaped vibration pipe 22 through the use of an adhesive. The vibration pipe 22 preferably has a thickness of about 0.2 mm. Accordingly, when a pulse drive signal is applied to the pus en 23, the volume of pump chamber 20 is varied to perfc~ the pump operation.
Referring to Figure 3, assume that the pus element 23 has a radius R and a length Q as shown. When a pulse drive signal is applied to the pus element 23, the pus element 23 expands in the directions shown by the arrows in FIGURE 3. When the pulse drive signal is not applied to the pus element 23, the volume "v"
defined by the pus element 2:3 is expressed as follows:
v = ~R2Q
When the pulse signal is applied to the pus element 23, the radius R and the length Q become R' and Q', I
respectively.
R' = Al K V ) Q' = Al + K V 3 t Accordingly, the volume v is changed to (v TV).
V -I TV = 1rR2Q[l -I TV ) 3 t ~R2Q(l + OK V ) t where:
K : strain constant R : radius of the pus element 23 Q : length of the pus eliminate 23 V : voltage level of the pulse drive signal t : thickness of the pus element 23 TV : volume variation The small amount ink liquid supply is conducted by -the volume variation TV applied to pump chamber 20.
TV = (v + TV) - v = TRUCK t In a specific example, cylindrically-shaped vibration pipe 22 was made of hard vinyl chloride resin, and had a thickness of 0.2 mm. The pus element 23 had a thickness (t) of 1.5 mm, a length (Q) of 40 mm, and a radius I of 13 mm, and was attached to the hard vinyl chloride resin pipe 22 through the use of an epoxy base adhesive. The strain constant K was 300 x 10 12 m/V.
When a pulse drive signal having 700 Up p level was applied to the pus element 2:3, the volume variation A was 8.8 mm3. In a preferred form, the pulse drive signal applied to the pus element 23 has a frequency of 122 Liz.
The invention having been described, it will be apparent that the same may be varied in many ways. Such 35 variations are not to be regrade as departing from the spirit and scope of the invention, and such modifications are in-tended to be included within the scope of the following claims. Jo ;
, . .
Claims (14)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An ink liquid supply system for supplying ink liquid from an ink liquid reservoir to a printer head in an ink jet system printer of the charge amplitude controlling type, comprising:
a pump system disposed between said ink liquid reservoir and said printer head, said pump system comprising:
a pump chamber; and a piezo element secured to said pump chamber for varying the volume of said pump chamber in response to a drive signal applied thereto.
a pump system disposed between said ink liquid reservoir and said printer head, said pump system comprising:
a pump chamber; and a piezo element secured to said pump chamber for varying the volume of said pump chamber in response to a drive signal applied thereto.
2. The ink liquid supply system of Claim 1, further comprising:
an accumulator disposed between said pump system and said printer head; and an electro-magnetic valve disposed between said accumulator and said printer head for selectively connecting said accumulator to said printer head.
an accumulator disposed between said pump system and said printer head; and an electro-magnetic valve disposed between said accumulator and said printer head for selectively connecting said accumulator to said printer head.
3. An ink liquid supply system for supplying ink liquid from an ink liquid reservoir to a printer head in an ink jet system printer of the charge amplitude controlling type, comprising:
a pump system disposed between said ink liquid reservoir and said printer head for supplying ink liquid from said ink liquid reservoir to said printer head, said pump system comprising:
a pump chamber surrounded by a vibration pipe;
and a piezo element attached to said vibration pipe for varying the volume of said pump chamber in response to a drive signal applied thereto; and an accumulator disposed between said pump system and said printer head for stabilizing the static pressure of the ink liquid developed from said pump system.
a pump system disposed between said ink liquid reservoir and said printer head for supplying ink liquid from said ink liquid reservoir to said printer head, said pump system comprising:
a pump chamber surrounded by a vibration pipe;
and a piezo element attached to said vibration pipe for varying the volume of said pump chamber in response to a drive signal applied thereto; and an accumulator disposed between said pump system and said printer head for stabilizing the static pressure of the ink liquid developed from said pump system.
4. The ink jet system printer of Claim 3, wherein said vibration pipe comprises a cylindrically shaped pipe made of hard vinyl chloride resin.
5. The ink jet system printer of Claim 3 or 4, wherein said drive signal is a pulse signal having a frequency of about 122 Hz, and a voltage level of about 700Vp-p.
6. An ink liquid supply system for supplying ink liquid to a printer head in an ink jet system printer of the charge amplitude controlling type, comprising:
an ink liquid cartridge tank including a means for discharging ink liquid from said tank and a means for introducing ink liquid into said tank, and a pump system disposed between said tank and said printer head, said pump system comprising:
a cylinder shaped housing for defining a pump chamber;
a piezo element secured to said housing for varying the volume of said pump chamber in response to a pulse signal applied thereto; and drive means for applying said pulse signal to said piezo element.
an ink liquid cartridge tank including a means for discharging ink liquid from said tank and a means for introducing ink liquid into said tank, and a pump system disposed between said tank and said printer head, said pump system comprising:
a cylinder shaped housing for defining a pump chamber;
a piezo element secured to said housing for varying the volume of said pump chamber in response to a pulse signal applied thereto; and drive means for applying said pulse signal to said piezo element.
7. The ink liquid supply system of Claim 6, further comprising:
an accumulator disposed between said pump system and said printer head for stabilizing static pressure of said ink liquid developed within said pump system; and an electro-magnetic cross valve disposed between said accumulator and said printer head for selectively connecting said accumulator to said printer head.
an accumulator disposed between said pump system and said printer head for stabilizing static pressure of said ink liquid developed within said pump system; and an electro-magnetic cross valve disposed between said accumulator and said printer head for selectively connecting said accumulator to said printer head.
8. The ink liquid supply system of Claim 6, wherein said cylinder shaped housing comprises a cylinder shaped vibration pipe around which said piezo element is secured.
9. The ink liquid supply system of Claim 8, wherein said vibration pipe is made of a resin sheet having a thickness of about 0.2 mm.
10. An ink jet system printer of the charge amplitude controlling type comprising:
an ink liquid reservoir;
a printer head for emitting ink droplets;
a pump system disposed between said ink liquid reservoir and said printer head for supplying ink liquid from said ink liquid reservoir to said printer head, said pump system comprising:
a cylindrically shaped vibration pipe defining a pump chamber;
a piezo element attached to said vibration pipe for varying volume of said pump chamber in response to a pulse signal applied thereto by a drive means; and an accumulator disposed between said pump system and said printer head for stabilizing static pressure of said ink liquid developed within said pump system.
an ink liquid reservoir;
a printer head for emitting ink droplets;
a pump system disposed between said ink liquid reservoir and said printer head for supplying ink liquid from said ink liquid reservoir to said printer head, said pump system comprising:
a cylindrically shaped vibration pipe defining a pump chamber;
a piezo element attached to said vibration pipe for varying volume of said pump chamber in response to a pulse signal applied thereto by a drive means; and an accumulator disposed between said pump system and said printer head for stabilizing static pressure of said ink liquid developed within said pump system.
11. An ink liquid supply system for supplying ink liquid to a printer head in an ink jet system printer of the charge amplitude controlling type, comprising:
an ink liquid cartridge tank including a means for discharging ink liquid from said tank and a means for introducing ink liquid into said tank, said means for discharging ink liquid from said tank comprising a pump system having a cylindrically shaped vibration pipe defining a pump chamber and a piezo element attached to said vibration pipe for varying volume of said pump chamber in response to a pulse signal applied thereto by a drive means.
an ink liquid cartridge tank including a means for discharging ink liquid from said tank and a means for introducing ink liquid into said tank, said means for discharging ink liquid from said tank comprising a pump system having a cylindrically shaped vibration pipe defining a pump chamber and a piezo element attached to said vibration pipe for varying volume of said pump chamber in response to a pulse signal applied thereto by a drive means.
12. The ink liquid supply system of Claim 11, wherein said vibration pipe is made of a resin sheet having a thickness of about 0.2 mm.
13. An ink jet system printer of the charge amplitude controlling type comprising:
an ink liquid reservoir;
a printer head for emitting ink droplets;
a pump system disposed between said ink liquid reservoir and said printer head for supplying ink liquid from said ink liquid reservoir to said printer head at a constant flow rate, said pump system comprising:
a cylindrically shaped vibration pipe defining a pump chamber;
a piezo element attached to said vibration pipe for varying a volume of said pump chamber in response to a pulse signal applied thereto by a drive means; and an accumulator disposed between said pump system and said printer head for stabilizing static pressure of said ink liquid developed within said pump system.
an ink liquid reservoir;
a printer head for emitting ink droplets;
a pump system disposed between said ink liquid reservoir and said printer head for supplying ink liquid from said ink liquid reservoir to said printer head at a constant flow rate, said pump system comprising:
a cylindrically shaped vibration pipe defining a pump chamber;
a piezo element attached to said vibration pipe for varying a volume of said pump chamber in response to a pulse signal applied thereto by a drive means; and an accumulator disposed between said pump system and said printer head for stabilizing static pressure of said ink liquid developed within said pump system.
14. The ink jet system printer of Claim 13, wherein said vibration pipe is made of hard vinyl chloride resin sheet having a thickness of about 0.2 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11824082A JPS597056A (en) | 1982-07-06 | 1982-07-06 | Ink supply device for ink jet printer |
| JP57-118240 | 1982-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1220377A true CA1220377A (en) | 1987-04-14 |
Family
ID=14731702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000431844A Expired CA1220377A (en) | 1982-07-06 | 1983-07-05 | Ink liquid supply system in an ink jet system printer of the charge amplitude controlling type |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS597056A (en) |
| CA (1) | CA1220377A (en) |
| DE (1) | DE3324397A1 (en) |
| GB (1) | GB2124553B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61206659A (en) * | 1985-03-11 | 1986-09-12 | Ricoh Co Ltd | Ink jet printer |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3391680A (en) * | 1965-09-01 | 1968-07-09 | Physics Internat Company | Fuel injector-ignitor system for internal combustion engines |
| GB1400397A (en) * | 1971-09-17 | 1975-07-16 | Lucas Electrical Co Ltd | Fuel injection system for an internal combustion engine |
| DE2543420C3 (en) * | 1975-09-29 | 1980-09-11 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Piezoelectric drive element for writing heads in ink mosaic writing devices |
| US4076046A (en) * | 1976-06-01 | 1978-02-28 | International Business Machines Corporation | Fast acting two-way valve |
| JPS5543258A (en) * | 1978-09-25 | 1980-03-27 | Nec Corp | Small pump |
| DE3007001A1 (en) * | 1980-02-25 | 1981-09-03 | Siemens AG, 1000 Berlin und 8000 München | Pump for small quantities of liquid - has tubular piezoelectric transducer excited to break seal with cylindrical core |
| DE3037380A1 (en) * | 1980-10-03 | 1982-05-13 | Carl Schenck Ag, 6100 Darmstadt | HYDRAULIC PRINTER GENERATOR AND / OR PRESSURE SUPPLY ARRANGEMENT |
| GB2111605B (en) * | 1981-11-03 | 1985-06-19 | Samuel Paul Bessman | Flexible chamber pumps |
-
1982
- 1982-07-06 JP JP11824082A patent/JPS597056A/en active Pending
-
1983
- 1983-07-01 GB GB08317915A patent/GB2124553B/en not_active Expired
- 1983-07-05 CA CA000431844A patent/CA1220377A/en not_active Expired
- 1983-07-06 DE DE19833324397 patent/DE3324397A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| GB2124553A (en) | 1984-02-22 |
| JPS597056A (en) | 1984-01-14 |
| DE3324397A1 (en) | 1984-01-12 |
| GB2124553B (en) | 1985-11-13 |
| GB8317915D0 (en) | 1983-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |