CN115384191B - Pulsation damper and ink-jet printer - Google Patents
Pulsation damper and ink-jet printer Download PDFInfo
- Publication number
- CN115384191B CN115384191B CN202211024229.XA CN202211024229A CN115384191B CN 115384191 B CN115384191 B CN 115384191B CN 202211024229 A CN202211024229 A CN 202211024229A CN 115384191 B CN115384191 B CN 115384191B
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- CN
- China
- Prior art keywords
- supporting table
- pulsation damper
- pressing piece
- fixed
- ink
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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
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
-
- 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
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- Ink Jet (AREA)
Abstract
The application discloses a pulsation damper and an ink-jet printer, which relate to the technical field of ink-jet printing, wherein the pulsation damper is used for supplying ink to the ink-jet printer and comprises the following components: the base is provided with a blind hole; the shell is fixed on the base, and a cavity communicated with the blind hole is arranged in the shell; the damping mechanism comprises an elastic pressing piece and a supporting table, wherein the elastic pressing piece is in a step shape, the bottom end of the supporting table is fixed in the blind hole, the top end of the supporting table extends into the cavity, and the elastic pressing piece penetrates through the supporting table and can move between the top end and the bottom end of the supporting table; and the diaphragm is positioned in the cavity and comprises an upper film stuck on the elastic pressing piece and a lower film stuck on the supporting table, the joint of the upper film and the lower film is fixed on the step, and the lower film is also fixed between the base and the shell. The application can ensure the ink to be supplied under constant pressure, can well avoid the rupture of the diaphragm and prolong the service life of the diaphragm.
Description
Technical Field
The application relates to the technical field of ink-jet printing, in particular to a pulsation damper and an ink-jet printer.
Background
Inkjet printers form images by pushing ink droplets toward a substrate, and when needed, inkjet printers form images by producing ink droplets from multiple nozzles, while continuous inkjet printers use electrostatics to deflect charged ink droplets from a single nozzle to multiple positions.
It is worth noting that the process of forming ink droplets and charging ink droplets requires ink to be supplied at a constant pressure, ideally without pressure pulsations. The presence of pressure pulses changes the velocity of the ink jet as it is ejected from the nozzle, thereby changing the distance and time that the ink drop is separated from the jet. The effect of the pressure pulsation can be observed by looking at the formation of the ink drop in the presence of a light source that strobes at the frequency of the ink drop generation and displays what is known as a "bouncing ink drop". It is also said that the time at which an ink drop breaks from the ink stream varies with time. Such a minute change caused by pressure pulsation affects the amount of charge on the ink droplet, which is to be avoided because if the amount of charge of the ink droplet is not satisfactory, it adversely affects the print quality.
For this reason, most continuous inkjet printers contain pulsation dampers. Currently there are mainly two types of pulsation dampers: spring loaded displacement dampers and energy storage dampers.
In a spring-loaded displacement damper, the device is divided into two compartments. The ink passes under pressure through the first compartment, while the second compartment contains a spring. The two compartments are separated by a membrane. The spring is connected to a membrane separating the two compartments and is compressed by the ink pressure. When pressure pulsation enters the damper, the spring compresses or expands to counteract the pulsation, thereby reducing the pulsing of the pulsation. The spring damper has the advantage that it does not require a large amount of ink to work, but is prone to failure when the membrane or diaphragm breaks or tears. To solve this problem, one way is by including a pulsation damper in the replaceable filter module, but this does not solve the problem and increases the cost.
The accumulator damper contains an orifice that flows into a large compartment for receiving a body of pressurized ink. The energy storage damper is fed into the spray head, which comprises an outlet, which is a nozzle, which itself is a small hole. Any pressure pulsations are compensated for by the large amount of pressurized fluid because the fluid flow is small compared to the accumulated pressurized fluid volume. A disadvantage of energy storage dampers is that they require large amounts of liquid, which are essentially stationary, which may lead to sedimentation, especially in pigmented inks. In addition, the orifice is prone to clogging, thereby reducing its reliability.
Disclosure of Invention
In view of the drawbacks of the prior art, a first aspect of the present application provides a pulsation damper that can ensure ink supply at a constant pressure, and can better avoid rupture of a diaphragm, and prolong the service life of the diaphragm.
In order to achieve the above purpose, the application adopts the following technical scheme:
a pulsation damper for supplying ink to an inkjet printer, comprising:
the base is provided with a blind hole;
the shell is fixed on the base, and a cavity communicated with the blind hole is arranged in the shell;
the damping mechanism comprises a step-shaped elastic pressing piece and a supporting table, the bottom end of the supporting table is fixed in the blind hole, the top end of the supporting table extends into the cavity, and the elastic pressing piece penetrates through the supporting table and can move between the top end and the bottom end of the supporting table; and
the diaphragm is located in the cavity, the diaphragm comprises an upper film and a lower film, the upper film is adhered to the elastic pressing piece, the lower film is adhered to the supporting table, the connecting part of the upper film and the lower film is fixed on the step, and the lower film is further fixed between the base and the shell.
In some embodiments, the resilient press comprises:
the pressing piece is of a cylindrical structure with a closed top and an open bottom;
and one end of the elastic piece is accommodated in the pressing piece and abuts against the top of the pressing piece, and the other end of the elastic piece penetrates through the top end of the supporting table and abuts against the blind hole.
In some embodiments, a protruding portion for fixing the elastic member is further disposed in the blind hole.
In some embodiments, the elastic member is a spring.
In some embodiments, the axial length of the press-on member is greater than the axial length of the tubular structure formed by the upper film.
In some embodiments, the material of the hold-down is polytetrafluoroethylene.
In some embodiments, the portion of the support stand extending into the cavity is in the shape of a truncated cone.
In some embodiments, the bottom end of the lower membrane is further provided with an ear extending between the base and the housing, and the ear is fixed between the base and the housing by a flange.
In some embodiments, the junction of the upper and lower membranes is secured to the step by a flange.
In a second aspect, the present application provides an ink jet printer that can ensure ink supply at a constant pressure, and that can better avoid rupture of the diaphragm, extending the service life of the diaphragm.
In order to achieve the above purpose, the application adopts the following technical scheme:
an inkjet printer comprising a pulsation damper as described in any of the above.
Compared with the prior art, the application has the advantages that:
in summary, the pulsation damper of the present application includes a damping mechanism and a diaphragm, wherein the damping mechanism includes a stepped elastic pressing member and a supporting table, the diaphragm includes an upper film attached to the pressing member and a lower film attached to the supporting table, and a connection portion between the upper film and the lower film is fixed on the step. Therefore, when the pressing piece is pressed, the upper film is deformed along the radial direction after being pressed, the stretching space of the upper film is sufficient due to the smaller diameter of the pressing piece, friction with the cavity can be well avoided, cracking is avoided, and meanwhile, the connecting part of the upper film and the lower film is fixed on the step, and the flange can be used for fixing the upper film and the lower film. When the pressing piece is pressed, the flange can be slightly folded to allow the diaphragm to freely roll when the pressing piece moves up and down, the lower diaphragm is mainly deformed in the direction perpendicular to the steps, and friction between the lower diaphragm and the cavity can be well avoided due to sufficient space above the steps, so that the service life of the diaphragm is well prolonged.
Drawings
FIG. 1 is a schematic view of a pulsation damper according to an embodiment of the present application;
FIG. 2 is a schematic view of the structure of the membrane when it is pressed in accordance with the embodiment of the present application.
In the figure: 1. a base; 11. a blind hole; 12. a protruding portion; 2. a housing; 21. a cavity; 22. an ink inlet; 23. an ink outlet; 3. a support table; 4. a diaphragm; 41. coating a film; 42. a lower film; 5. a pressing member; 6. an elastic member; 7. and a seal.
Detailed Description
The following describes the application in further detail, including preferred embodiments, by way of the accompanying drawings and by way of examples of some alternative embodiments of the application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
Further, in the present application, relational terms such as "first" and "second", and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1, an embodiment of the present application discloses a pulsation damper for supplying ink to an inkjet printer, which includes a base 1, a housing 2, a damping mechanism, and a diaphragm 4.
Wherein, be equipped with a blind hole 11 on the base 1, casing 2 is fixed on the base 1, is equipped with the cavity 21 with blind hole 11 intercommunication in the casing 2, still is equipped with the ink inlet 22 and the ink outlet 23 that supply the ink to flow on the casing 2.
The damping mechanism comprises a step-shaped elastic pressing piece and a supporting table 3, the bottom end of the supporting table 3 is fixed in the blind hole 11, the top end of the supporting table extends into the cavity 21, and the elastic pressing piece penetrates through the supporting table 3 and can move between the top end and the bottom end of the supporting table 3.
The diaphragm 4 is located in the cavity 21, the diaphragm 4 includes an upper membrane 41 attached to the elastic pressing member and a lower membrane 42 attached to the support table 3, the junction of the upper membrane 41 and the lower membrane 42 is fixed on the step, and the lower membrane 42 is also fixed between the base 1 and the housing 2.
It should be noted that the diaphragm 4 in the embodiment of the present application is divided into two parts, that is, an upper film 41 and a lower film 42, wherein the upper film 41 is attached to the elastic pressing member, and the lower film 42 is attached to the support table 3.
In some embodiments, the elastic pressing piece comprises a pressing piece 5 and an elastic piece 6, wherein the pressing piece 5 is of a cylindrical structure with a closed top and an open bottom; one end of the elastic piece 6 is contained in the pressing piece 5 and abuts against the top of the pressing piece 5, and the other end of the elastic piece passes through the top end of the supporting table 3 and abuts against the blind hole 11.
Because the upper film 41 is attached to the pressing member 5, that is, the upper film 41 is also substantially cylindrical. Referring to fig. 1, the diameter of the support table 3 is larger than that of the holder 5, so that both may be formed in a stepped shape. In this way, when the pressing member 5 is pressed, the upper film 41 will deform along the radial direction after being pressed, and because the diameter of the pressing member 5 is smaller, the stretching space of the upper film 41 is more sufficient, so that friction with the cavity 21 can be well avoided, cracking is avoided, and it is understood that the size of the cavity 21 can leave enough space to cope with the deformation of the upper film 41 during design.
Meanwhile, since the junction of the upper and lower films 41 and 42 is fixed to the step, a flange is generally used to fix the two. When the pressing member 5 is pressed, the flange is slightly folded to allow the diaphragm 4 to roll freely when the pressing member 5 moves up and down, and as can be seen in fig. 2, the lower film 42 is mainly deformed in a direction perpendicular to the step, and the space above the step is sufficient, so that friction between the lower film 42 and the cavity 21 is well avoided, preferably, the portion of the support table 3 extending into the cavity 21 is in a circular truncated cone shape, because the lower film 42 is attached to the support table 3, so that the radial distance between the lower film 42 and the cavity 21 is increased, and thus the deformation generated by the lower film 42 can be better dealt with.
In some embodiments, the bottom end of the lower film 42 is further provided with an ear extending between the base 1 and the housing 2, and the ear is fixed between the base 1 and the housing 2 by a flange, so that the lower film 42 can be well fixed. In addition, in order to increase the sealing performance of the pulsation damper, a circular sealing member 7 is provided at the flange of the fixing lug.
Furthermore, in some embodiments, the axial length of the hold-down 5 is greater than the axial length of the tubular structure formed by the upper membrane 41. For example, it may be arranged that a part of the holding member 5 still extends into the support table 3 when the holding member 5 is positioned at the topmost end, so that the holding member 5 can always be in close contact with the inner wall of the support table 3 when sliding along the support table 3. The pressing piece 5 can always move along the axial direction, and the stability of the pulsation damper is ensured.
Furthermore, in order to reduce friction between the holding member 5 and the supporting table 3, the holding member 5 in the embodiment of the present application is usually made of a material with a low friction coefficient, such as polytetrafluoroethylene.
In some embodiments, in order to ensure the stability of the elastic element 6, a protrusion 12 is also provided in the blind hole 11, which secures the elastic element 6. Preferably, the elastic member 6 in the embodiment of the present application is a spring, and referring to fig. 1, the protruding portion 12 can clamp the inner wall of the spring, so as to avoid shaking when the spring is pressed, and further improve the stability of the pulsation damper.
In summary, the pulsation damper of the present application includes the damping mechanism and the diaphragm 4, wherein the damping mechanism includes the elastic pressing member and the supporting table 3 having a step shape, the diaphragm 4 includes the upper film 41 attached to the pressing member 5 and the lower film 42 attached to the supporting table 3, and the connection portion of the upper film 41 and the lower film 42 is fixed on the step, and the diameter of the supporting table 3 is larger than the diameter of the pressing member 5, so that the two can form a step shape. Therefore, when the pressing member 5 is pressed, the upper film 41 will deform along the radial direction after being pressed, and because the diameter of the pressing member 5 is smaller, the stretching space of the upper film 41 is more sufficient, so that friction with the cavity 21 can be well avoided, cracking is avoided, and meanwhile, because the connecting part of the upper film 41 and the lower film 42 is fixed on the step, the flange can be generally adopted to fix the upper film 41 and the lower film 42. When the pressing member 5 is pressed, the flange is slightly folded to allow the diaphragm 4 to freely roll when the pressing member 5 moves up and down, the lower film 42 is mainly deformed in the direction perpendicular to the steps, and the friction between the lower film 42 and the cavity 21 is well avoided due to sufficient space above the steps, so that the service life of the diaphragm 4 is well prolonged.
Meanwhile, the embodiment of the application also discloses an ink-jet printer which comprises a pulsation damper, wherein the pulsation damper comprises a base 1, a shell 2, a damping mechanism and a diaphragm 4.
The base 1 is provided with a blind hole 11; the shell 2 is fixed on the base 1, and a cavity 21 communicated with the blind hole 11 is arranged in the shell 2.
The damping mechanism comprises a step-shaped elastic pressing piece and a supporting table 3, the bottom end of the supporting table 3 is fixed in the blind hole 11, the top end of the supporting table extends into the cavity 21, and the elastic pressing piece penetrates through the supporting table 3 and can move between the top end and the bottom end of the supporting table 3.
The diaphragm 4 is located in the cavity 21, the diaphragm 4 comprises an upper film 41 attached to the elastic pressing piece and a lower film 42 attached to the supporting table 3, the connection part of the upper film 41 and the lower film 42 is fixed on the step, and the lower film 42 is also fixed between the base 1 and the shell 2.
Further, the elastic pressing member includes a pressing member 5 and an elastic member 6.
The pressing piece 5 is of a cylindrical structure with a closed top and an open bottom; one end of the elastic piece 6 is contained in the holding piece 5 and abuts against the top of the holding piece 5, and the other end of the elastic piece passes through the top end of the supporting table 3 and abuts against the blind hole 11.
Further, a protruding portion 12 for fixing the elastic member 6 is provided in the blind hole 11.
Further, the elastic member 6 is a spring.
Further, the axial length of the press-holding member 5 is greater than that of the cylindrical structure formed by the upper film 41.
Further, the material of the holding piece 5 is polytetrafluoroethylene.
Further, the portion of the support table 3 extending into the cavity 21 is in the shape of a truncated cone.
Further, the bottom end of the lower film 42 is further provided with an ear extending between the base 1 and the housing 2, and the ear is fixed between the base 1 and the housing 2 by a flange.
Further, the junction of the upper and lower films 41 and 42 is fixed to the step by a flange.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A pulsation damper for supplying ink to an inkjet printer, comprising:
the base (1) is provided with a blind hole (11);
the shell (2) is fixed on the base (1), and a cavity (21) communicated with the blind hole (11) is arranged in the shell (2);
the damping mechanism comprises an elastic pressing piece and a supporting table (3), wherein the diameter of the supporting table (3) is larger than that of the elastic pressing piece, so that the supporting table and the supporting table form a step shape, the bottom end of the supporting table (3) is fixed in the blind hole (11), the top end of the supporting table extends into the cavity (21), and the elastic pressing piece penetrates through the supporting table (3) and can move between the top end and the bottom end of the supporting table (3); and
the diaphragm (4) is located in the cavity (21), the diaphragm (4) comprises an upper film (41) attached to the elastic pressing piece and a lower film (42) attached to the supporting table (3), the connecting part of the upper film (41) and the lower film (42) is fixed on the step, and the lower film (42) is further fixed between the base (1) and the shell (2).
2. The pulsation damper of claim 1, wherein said resilient hold-down member comprises:
a pressing and holding piece (5) which is of a cylindrical structure with a closed top and an open bottom;
and one end of the elastic piece (6) is contained in the pressing piece (5) and abuts against the top of the pressing piece (5), and the other end of the elastic piece passes through the top end of the supporting table (3) and abuts against the blind hole (11).
3. A pulsation damper according to claim 2, characterized in that: the blind hole (11) is also internally provided with a protruding part (12) for fixing the elastic piece (6).
4. A pulsation damper according to claim 2, characterized in that: the elastic piece (6) is a spring.
5. A pulsation damper according to claim 2, characterized in that: the axial length of the pressing piece (5) is larger than that of the cylindrical structure formed by the upper film (41).
6. A pulsation damper according to claim 2, characterized in that: the material of the pressing piece (5) is polytetrafluoroethylene.
7. A pulsation damper according to claim 1, characterized in that: the part of the supporting table (3) extending into the cavity (21) is in a truncated cone shape.
8. A pulsation damper according to claim 1, characterized in that: the bottom end of the lower film (42) is also provided with an ear part extending between the base (1) and the shell (2), and the ear part is fixed between the base (1) and the shell (2) through a flange.
9. A pulsation damper according to claim 1, characterized in that: the connection part of the upper membrane (41) and the lower membrane (42) is fixed on the step through a flange.
10. An inkjet printer, characterized by: comprising a pulsation damper according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024229.XA CN115384191B (en) | 2022-08-24 | 2022-08-24 | Pulsation damper and ink-jet printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024229.XA CN115384191B (en) | 2022-08-24 | 2022-08-24 | Pulsation damper and ink-jet printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115384191A CN115384191A (en) | 2022-11-25 |
| CN115384191B true CN115384191B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211024229.XA Active CN115384191B (en) | 2022-08-24 | 2022-08-24 | Pulsation damper and ink-jet printer |
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| Country | Link |
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| CN (1) | CN115384191B (en) |
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| JP2001253085A (en) * | 2000-03-14 | 2001-09-18 | Seiko Epson Corp | Ink jet recorder |
| KR20090006864U (en) * | 2008-01-02 | 2009-07-07 | 주식회사 퍼시픽콘트롤즈 | Damper for reducing pulsation |
| CN203516938U (en) * | 2013-09-23 | 2014-04-02 | 杭州佳能阀门有限公司 | Novel pneumatic diaphragm actuating mechanism |
| CN105909858A (en) * | 2016-06-30 | 2016-08-31 | 纽威石油设备（苏州）有限公司 | Pneumatic diaphragm actuator and safety valve |
| CN205618473U (en) * | 2016-02-29 | 2016-10-05 | 汉捷机械部件（常州）有限公司 | Anti pulse actuator with hydraulic damper |
| GB201617490D0 (en) * | 2016-10-14 | 2016-11-30 | Domino Uk Limited | Improvements in or relating to continuous inkjet printers |
| CN106604824A (en) * | 2014-06-05 | 2017-04-26 | 录象射流技术公司 | A self-sealing filter module for inkjet printing |
| CN112009103A (en) * | 2019-05-29 | 2020-12-01 | 精工爱普生株式会社 | Valve mechanism and liquid injection system |
| CN112922720A (en) * | 2021-03-17 | 2021-06-08 | 太仓源凯汽车配件有限公司 | Short cavity executor |
| CN213501440U (en) * | 2020-06-19 | 2021-06-22 | 镭德杰标识科技武汉有限公司 | Pressure buffer of small-character code spraying machine |
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2022
- 2022-08-24 CN CN202211024229.XA patent/CN115384191B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001253085A (en) * | 2000-03-14 | 2001-09-18 | Seiko Epson Corp | Ink jet recorder |
| KR20090006864U (en) * | 2008-01-02 | 2009-07-07 | 주식회사 퍼시픽콘트롤즈 | Damper for reducing pulsation |
| CN203516938U (en) * | 2013-09-23 | 2014-04-02 | 杭州佳能阀门有限公司 | Novel pneumatic diaphragm actuating mechanism |
| CN106604824A (en) * | 2014-06-05 | 2017-04-26 | 录象射流技术公司 | A self-sealing filter module for inkjet printing |
| CN205618473U (en) * | 2016-02-29 | 2016-10-05 | 汉捷机械部件（常州）有限公司 | Anti pulse actuator with hydraulic damper |
| CN105909858A (en) * | 2016-06-30 | 2016-08-31 | 纽威石油设备（苏州）有限公司 | Pneumatic diaphragm actuator and safety valve |
| GB201617490D0 (en) * | 2016-10-14 | 2016-11-30 | Domino Uk Limited | Improvements in or relating to continuous inkjet printers |
| CN112009103A (en) * | 2019-05-29 | 2020-12-01 | 精工爱普生株式会社 | Valve mechanism and liquid injection system |
| CN213501440U (en) * | 2020-06-19 | 2021-06-22 | 镭德杰标识科技武汉有限公司 | Pressure buffer of small-character code spraying machine |
| CN112922720A (en) * | 2021-03-17 | 2021-06-08 | 太仓源凯汽车配件有限公司 | Short cavity executor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115384191A (en) | 2022-11-25 |
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