JP6825267B2 - 液体吐出装置 - Google Patents
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- JP6825267B2 JP6825267B2 JP2016166556A JP2016166556A JP6825267B2 JP 6825267 B2 JP6825267 B2 JP 6825267B2 JP 2016166556 A JP2016166556 A JP 2016166556A JP 2016166556 A JP2016166556 A JP 2016166556A JP 6825267 B2 JP6825267 B2 JP 6825267B2
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Images
Classifications
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- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04588—Control methods or devices therefor, e.g. driver circuits, control circuits using a specific waveform
-
- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on piezoelectric elements
-
- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04586—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type
-
- 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
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- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
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- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
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- 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
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- 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
- B41J2/16526—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 by applying pressure only
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- 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
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- B41J2/16535—Cleaning of print head nozzles using wiping constructions
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
Description
前記アクチュエーターを駆動する駆動パルスを発生する駆動パルス発生回路と、
を備え、前記ノズル形成面に撥液膜が形成された液体吐出装置であって、
前記駆動パルスは、前記ノズルにおけるメニスカスを初期位置から吐出方向における上流側に引き込む第1引き込み要素と、当該引き込まれたメニスカスを前記吐出方向における下流側に押し出す第1押し出し要素と、当該押し出されたメニスカスを上流側に再度引き込む第2引き込み要素と、当該再度引き込まれたメニスカスの少なくとも一部を下流側に再度押し出す第2押し出し要素と、を有し、
前記液体吐出ヘッドが吐出する液体のうち前記撥液膜の撥液性を相対的に損ない易い種類の特種液体を吐出する前記ノズルに対応する前記アクチュエーターは、前記駆動パルスにより駆動されることを特徴とする。
ここで、「専ら前記駆動パルスにより駆動される」とは原則として当該駆動パルスのみで駆動されるが、例外的に他の駆動パルスで駆動されることを許容するものである。
前記パルス切替条件は、前記払拭機構による前記ノズル形成面の所定の払拭回数である構成を採用することが望ましい。
Claims (7)
- ノズルが開口したノズル形成面を有し、アクチュエーターの駆動により前記ノズルから液体を吐出する液体吐出ヘッドと、
前記アクチュエーターを駆動する駆動パルスを発生する駆動パルス発生回路と、
を備え、前記ノズル形成面に撥液膜が形成された液体吐出装置であって、
前記駆動パルスは、第1駆動パルスと、前記第1駆動パルスとは異なる第2駆動パルスとを含み、
前記第1駆動パルスは、前記ノズルにおけるメニスカスを初期位置から吐出方向における上流側に引き込む第1予備膨張要素と、当該引き込まれたメニスカスを前記吐出方向における下流側に押し出す第1収縮要素と、を有し、
前記第2駆動パルスは、前記ノズルにおけるメニスカスを初期位置から吐出方向における上流側に引き込む第1引き込み要素と、当該引き込まれたメニスカスを前記吐出方向における下流側に押し出す第1押し出し要素と、当該押し出されたメニスカスを上流側に再度引き込む第2引き込み要素と、当該再度引き込まれたメニスカスの少なくとも一部を下流側に再度押し出す第2押し出し要素と、を有し、
前記第1駆動パルスの前記第1収縮要素により押し出された液体から分離した部分が前記第1駆動パルスにより吐出される液滴であり、
前記第2駆動パルスの前記第2押し出し要素により再度押し出された液体から分離した部分が前記第2駆動パルスにより吐出される液滴であり、
前記液体吐出ヘッドが吐出する液体のうち他の液体より前記撥液膜の撥液性を相対的に損ない易い種類の特種液体を吐出する前記ノズルに対応する前記アクチュエーターは、専ら前記第2駆動パルスにより駆動され、
前記他の液体を吐出する前記ノズルに対応する前記アクチュエーターは、所定のパルス切替条件を満たすまでは前記第1駆動パルスと前記第2駆動パルスとにより駆動される一方、前記パルス切替条件を満たした以降においては専ら前記第2駆動パルスにより駆動されることを特徴とする液体吐出装置。 - 前記撥液膜における前記特種液体の静的接触角が、前記他の液体の静的接触角よりも小さいことを特徴とする請求項1に記載の液体吐出装置。
- 前記特種液体が、前記他の液体よりも異物が付着しやすいことを特徴とする請求項1または請求項2に記載の液体吐出装置。
- 前記特種液体が、顔料または無機材料を含むことを特徴とする請求項1から請求項3の何れか一項に記載の液体吐出装置。
- 前記特種液体が、前記他の液体よりも前記撥液膜を腐食しやすいことを特徴とする請求項1から請求項4の何れか一項に記載の液体吐出装置。
- 前記ノズル形成面を払拭する払拭機構を備え、
前記パルス切替条件は、前記払拭機構による前記ノズル形成面の所定の払拭回数であることを特徴とする請求項1から請求項5の何れか一項に記載の液体吐出装置。 - 前記ノズル形成面を封止する封止機構を備えることを特徴とする請求項6に記載の液体吐出装置。
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