CN210063431U - Quantitative feeding device of powder packaging machine - Google Patents
Quantitative feeding device of powder packaging machine Download PDFInfo
- Publication number
- CN210063431U CN210063431U CN201920619609.5U CN201920619609U CN210063431U CN 210063431 U CN210063431 U CN 210063431U CN 201920619609 U CN201920619609 U CN 201920619609U CN 210063431 U CN210063431 U CN 210063431U
- Authority
- CN
- China
- Prior art keywords
- feeding
- supporting plate
- turntable
- material supporting
- hole
- 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.)
- Active
Links
- 239000000843 powder Substances 0.000 title claims abstract description 53
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 60
- 238000003860 storage Methods 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 238000007790 scraping Methods 0.000 claims abstract description 22
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 229920006280 packaging film Polymers 0.000 description 4
- 239000012785 packaging film Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Basic Packing Technique (AREA)
Abstract
A quantitative feeding device of a powder packaging machine comprises a frame, a storage bin, a material supporting plate, a feeding rotary disc and a scraping plate, wherein the material supporting plate is positioned under the storage bin, and a blanking port is formed in the material supporting plate; the feeding rotary table is arranged between the discharge port of the storage bin and the material supporting plate, and the frame is provided with a feeding rotary table driving mechanism capable of driving the feeding rotary table to rotate; the bottom of the feeding turntable is provided with a plurality of feeding parts which are sequentially arranged at equal intervals along the rotating axis of the feeding turntable, the top of each feeding part is provided with a feeding hole, the bottom of each feeding part is provided with a discharging hole, the feeding hole of each feeding part is communicated with the cavity of the feeding turntable, the opening edge of the discharging hole of each feeding part is in contact fit with the upper surface of the retainer plate, and the discharging hole of each feeding part corresponds to the position of the blanking hole of the retainer plate; the scraping plate is arranged on the frame and is positioned in the feeding turntable, and the scraping plate is positioned between the discharge port of the storage bin and the blanking port of the supporting plate. The quantitative feeding device can realize the metering supply of powder, and the feeding amount is more accurate.
Description
Technical Field
The utility model relates to a packaging machinery, concretely relates to powder packaging machine's dosing device.
Background
The powder needs to be bagged after production, so as to be convenient for storage and transportation. In the past, the operation mode of manual bagging is generally adopted for completion, and the mode has the problems of high labor intensity, low production efficiency and the like.
In order to improve the production efficiency and reduce the labor intensity, people develop a powder packaging machine capable of automatically completing bag making and bagging processes. The existing powder packaging machine generally comprises a packaging film unwinding device, a bag former, a longitudinal sealing device, a transverse sealing device, a cutting device and a feeding device, wherein the packaging film unwinding device firstly conveys the packaging film to the bag former for bending and forming, and then the longitudinal sealing device seals two overlapped side edges of the packaging film together to complete the longitudinal sealing of the packaging bag to form a packaging bag unit with openings at the upper end and the lower end. In the conveying process of the packaging bag unit from the longitudinal sealing device to the transverse sealing device, the feeding device fills powder into the packaging bag unit, the transverse sealing device seals openings at two ends of the packaging bag unit, and the cutting device cuts the transverse sealing part to form independent packaging bags and wrap the powder in the independent packaging bags. However, the feeding device has the problem of inaccurate metering in the process of feeding the powder to each packaging bag unit, so that the quality error of the powder in each packaging bag is large, and the packaging quality is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a powder packagine machine's dosing device is provided, this kind of dosing device can realize the measurement supply to the powder, and the feed volume is comparatively accurate. The technical scheme is as follows:
the utility model provides a powder packagine machine's dosing device which characterized in that: the material scraping device comprises a rack, a storage bin, a material supporting plate, a feeding turntable and a material scraping plate, wherein the storage bin and the material supporting plate are both arranged on the rack; the feeding rotary table is arranged between the discharge port of the storage bin and the material supporting plate, the frame is provided with a feeding rotary table driving mechanism capable of driving the feeding rotary table to rotate, and the rotating axis of the feeding rotary table is arranged along the vertical direction; the top of the feeding turntable is provided with an opening, the bottom of the feeding turntable is provided with a plurality of feeding parts which are sequentially arranged at equal intervals along the rotation axis of the feeding turntable, the top of each feeding part is provided with a feeding hole, the bottom of each feeding part is provided with a discharging hole, each feeding part is internally provided with a feeding cavity for communicating the feeding hole with the discharging hole, the feeding hole of each feeding part is communicated with the cavity of the feeding turntable, the opening edge of the discharging hole of each feeding part is in contact fit with the upper surface of the material supporting plate, and the discharging hole of each feeding part corresponds to the position of the; the scraping plate is arranged on the frame and is positioned in the cavity of the feeding turntable, and the scraping plate is positioned between the discharge port of the storage bin and the blanking port of the material supporting plate.
Generally, the scraping plate corresponds to the position of the feeding port of each feeding part, and the lower side edge of the scraping plate is in contact fit with the material supporting plate or is slightly higher than the upper surface of the material supporting plate.
Generally, the quantitative feeding device is arranged above a bag former of the powder packaging machine, and a blanking port of the retainer plate is communicated with a cavity of the bag former.
When the powder feeding device works, the storage bin is used for storing a certain amount of powder and can supply the powder to the cavity of the feeding turntable; the feeding turntable driving mechanism drives the feeding turntable and each feeding part to rotate around the rotating axis of the feeding turntable; at the moment, powder in the feeding rotary disc is filled into the feeding cavity of the feeding part under the combined action of the feeding rotary disc and the scraping plate (at the moment, the material supporting plate shields the discharging hole of the feeding part to prevent the powder in the feeding cavity from leaving from the discharging hole, and the scraping plate can scrape redundant powder passing through the feeding hole of the feeding part to ensure accurate feeding amount of the feeding part) and moves towards the blanking hole of the material supporting plate along with the feeding part. When the feeding part reaches the blanking port of the material supporting plate, the discharge port at the bottom of the feeding part is just communicated with the cavity of the bag former through the blanking port, and powder in the feeding cavity sequentially falls into the cavity of the bag former through the blanking port under the action of self gravity and then enters the packaging bag unit below the bag former. When a feeding part moves to the blanking port of the material supporting plate, the quantitative feeding device supplies a certain amount of powder to a packaging bag unit to finish one-time metering supply of the powder. The quantitative feeding device can realize the metering supply of powder through the matching among the storage bin, the material supporting plate, the feeding rotary table, the scraping plate and each feeding part, the feeding amount is accurate, and the powder quality error in each packaging bag can be effectively reduced, so that the packaging quality is ensured.
In the preferred scheme, above-mentioned feed carousel actuating mechanism includes pivot, feed motor, driving pulley, driven pulleys and annular hold-in range, and the pivot is rotatable to be installed in the frame and along upper and lower direction setting, the feed carousel is installed in the upper end of pivot, and the feed motor is installed in the frame, and driving pulley installs in the power output shaft of feed motor, and driven pulleys installs in the pivot, and driving pulley, driven pulleys are annular hold-in range tensioning jointly. When the feeding mechanism works, the feeding motor drives the driving belt wheel to rotate, and the driven belt wheel, the rotating shaft, the feeding rotary table and each feeding part are driven to rotate around the rotating shaft through the annular synchronous belt.
In a preferred scheme, the feeding part comprises a feeding pipe, a feeding block and a compression spring, the feeding pipe is arranged on the feeding turntable and is arranged along the vertical direction, and the upper end of the feeding pipe is communicated with a cavity of the feeding turntable; the feeding block is provided with a feeding through hole in the vertical direction, the lower end of the feeding pipe is positioned in the feeding through hole and is in contact fit with the inner wall of the feeding through hole, and the bottom surface of the feeding block is in contact fit with the upper surface of the material supporting plate; the feeding block consists of a spring positioning section and a limiting section, the upper end of the limiting section is integrally connected with the lower end of the spring positioning section, the size of the cross section of the limiting section is larger than that of the spring positioning section, and an annular limiting step is formed at the joint of the upper end of the limiting section and the lower end of the spring positioning section; the compression spring is sleeved on the spring positioning section, the upper end of the compression spring is connected with or in close contact with the bottom of the feeding turntable, and the lower end of the compression spring is connected with or in close contact with the annular limiting step. By adopting the structure, the upper end of the feeding pipe forms a feeding hole of the feeding part, the lower end of the feeding through hole forms a discharging hole of the feeding part, and the cavity of the feeding pipe and the cavity of the feeding through hole together form a feeding cavity of the feeding part. When the device works, each feeding pipe is driven by the feeding turntable to rotate and drive the feeding block and the compression spring to move together; the compression spring can apply downward thrust to the feeding block, so that the bottom surface of the feeding block keeps contact fit with the upper surface of the retainer plate, and the retainer plate is ensured to shield a discharge hole of the feeding part; in the moving process, the feeding block can move along the feeding pipe upwards in a microspur mode, and the feeding block is guaranteed to move on the material supporting plate stably.
When the feeding part is driven by the feeding rotary disc to rotate, because a gap exists between the bottom surface of the feeding block and the upper surface of the material supporting plate, a small amount of powder in the feeding cavity can come out from the gap and is left on the material supporting plate. In order to avoid the powder falling to pollute the workshop, in a more preferable scheme, an annular protective wall is arranged on the outer edge of the material supporting plate, a residual material collecting opening is formed in the annular protective wall, and a residual material collecting container is arranged below the residual material collecting opening. The annular retaining wall is used for preventing powder on the material supporting plate from falling to pollute a workshop; and the powder left on the material supporting plate is stirred by the feeding block to move and falls into a residual material collecting container through a residual material collecting opening, so that the residual material is collected.
In a preferred scheme, the quantitative feeding device further comprises a blanking pipe, the blanking pipe is arranged on the lower side of the material supporting plate, the cross section area of the blanking pipe is gradually reduced from the upper end of the blanking pipe to the lower end of the blanking pipe, and the upper end of the blanking pipe is communicated with a blanking port of the material supporting plate. Typically, the lower end of the down tube communicates with the cavity of the bag former. The blanking pipe is used for guiding powder in the feeding cavity of the feeding part into the cavity of the bag former and then into the packaging bag unit below the bag former.
The utility model discloses a dosing device passes through the storage silo, holds in the palm flitch, feed carousel, scrapes the cooperation between flitch and each pay-off part, can realize the measurement supply to the powder, and the feed volume is comparatively accurate, can effectively reduce the powder mass error in every packing bag to guarantee the packing quality.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Detailed Description
As shown in fig. 1, the quantitative feeding device of the powder packaging machine comprises a frame (not shown), a storage bin 1, a retainer plate 2, a feeding turntable 3 and a scraper plate 4, wherein the storage bin 1 and the retainer plate 2 are both mounted on the frame, the top of the storage bin 1 is provided with a feeding port 101, the bottom of the storage bin 1 is provided with a discharging port 102, the retainer plate 2 is positioned under the storage bin 1, and the retainer plate 2 is provided with a blanking port 201; the feeding rotary table 3 is arranged between the discharge port of the storage bin 1 and the material supporting plate 2, a feeding rotary table driving mechanism 6 capable of driving the feeding rotary table 3 to rotate is arranged on the rack, and the rotating axis of the feeding rotary table 3 is arranged along the vertical direction; the top of the feeding turntable 3 is provided with an opening 31, the bottom of the feeding turntable 3 is provided with a plurality of feeding parts 7 which are sequentially arranged at equal intervals along the rotation axis of the feeding turntable 3, the top of each feeding part 7 is provided with a feeding hole 701, the bottom of each feeding part 7 is provided with a discharging hole 702, each feeding part 7 is internally provided with a feeding cavity 703 for communicating the feeding hole 701 with the discharging hole 702, the feeding hole 701 of each feeding part 7 is communicated with the cavity of the feeding turntable 3, the opening edge of the discharging hole 702 of each feeding part 7 is in contact fit with the upper surface of the material supporting plate 2, and the discharging hole 702 of each feeding part 7 corresponds to the position; the scraping plate 4 is installed on the frame and is positioned in the cavity of the feeding turntable 3, the scraping plate 4 is positioned between the discharge port 702 of the storage bin 1 and the blanking port 201 of the material supporting plate 2, the scraping plate 4 corresponds to the feed port 701 of each feeding component 7, and the lower side edge of the scraping plate 4 is in contact fit with the material supporting plate 2.
In this embodiment, the feed turntable driving mechanism 6 includes a rotating shaft 61, a feed motor 62, a driving pulley 63, a driven pulley 64 and an annular timing belt 65, the rotating shaft 61 is rotatably installed on the frame and is arranged along the up-down direction, the feed turntable 3 is installed at the upper end of the rotating shaft 61, the feed motor 62 is installed on the frame, the driving pulley 63 is installed on the power output shaft of the feed motor 62, the driven pulley 64 is installed on the lower end of the rotating shaft 61, and the driving pulley 63 and the driven pulley 64 jointly tension the annular timing belt 65.
In the embodiment, the feeding component 7 comprises a feeding pipe 71, a feeding block 72 and a compression spring 73, the feeding pipe 71 is mounted on the feeding turntable 3 and is arranged along the up-down direction, and the upper end of the feeding pipe 71 is communicated with the cavity of the feeding turntable 3; the feeding block 72 is provided with a feeding through hole 7201 which runs up and down, the lower end of the feeding pipe 71 is positioned in the feeding through hole 7201, and the bottom surface of the feeding block 72 is in contact fit with the upper surface of the retainer plate 2; the feeding block 72 consists of a spring positioning section 721 and a limiting section 722, the upper end of the limiting section 722 is integrally connected with the lower end of the spring positioning section 721, the cross section of the limiting section 722 is larger than that of the spring positioning section 721, and an annular limiting step 7202 is formed at the joint of the upper end of the limiting section 722 and the lower end of the spring positioning section 721; the compression spring 73 is sleeved on the spring positioning section 721, the upper end of the compression spring 73 is connected with or in close contact with the bottom of the feeding turntable 3, and the lower end of the compression spring 73 is connected with or in close contact with the annular limiting step 7202; the upper end of the feeding pipe 71 forms a feeding hole 701 of the feeding part 7, the lower end of the feeding through hole 7201 forms a discharging hole 702 of the feeding part 7, and the cavity of the feeding pipe 71 and the cavity of the feeding through hole 7201 together form a feeding cavity 703 of the feeding part 7.
In this embodiment, an annular retaining wall 21 is disposed on the outer edge of the retainer plate 2, a residue collecting opening 211 is disposed on the annular retaining wall 21, and a residue collecting container 22 is disposed below the residue collecting opening 211.
The working principle of the quantitative feeding device is briefly described as follows:
the quantitative feeding device is arranged above a bag former of the powder packaging machine, and a blanking port 201 of the material supporting plate 2 is communicated with a cavity of the bag former.
When the powder storage device works, the storage bin 1 is used for storing a certain amount of powder and supplying the powder to the cavity of the feeding rotary table 3, the feeding motor 62 drives the driving belt wheel 63 to rotate, and the driven belt wheel 64, the rotating shaft 61, the feeding rotary table 3 and each feeding part 7 are driven to rotate around the rotating shaft 61 through the annular synchronous belt 65; the powder in the feeding rotary disc 3 is filled into the feeding cavity 703 of the feeding part 7 under the combined action of the feeding rotary disc 3 and the scraping plate 4 (at this time, the material supporting plate 2 shields the discharging hole 702 of the feeding part 7 to prevent the powder in the feeding cavity 703 from leaving from the discharging hole 702, the scraping plate 4 can scrape the excess powder passing through the feeding hole 701 of the feeding part 7 to ensure the accurate feeding amount of the feeding part 7), and the powder moves towards the blanking hole 201 of the material supporting plate 2 along with the feeding part 7. When the feeding component 7 reaches the blanking port 201 of the material supporting plate 2, the discharge port 702 at the bottom of the feeding component 7 is just communicated with the cavity of the bag former through the blanking port 201, and powder in the feeding cavity 703 sequentially falls into the cavity of the bag former through the blanking port 201 under the action of self gravity, and then enters the packaging bag unit below the bag former. Every time when one feeding part 7 moves to the blanking port 201 of the retainer plate 2, the quantitative feeding device supplies a certain amount of powder to one packaging bag unit, and one metering supply of the powder is completed. When the feeding component 7 is driven by the feeding turntable 3 to rotate, the annular protective wall 21 can prevent powder on the material supporting plate 2 from falling to pollute a workshop; and the powder left on the material supporting plate 2 is stirred by the feeding block 72 to move and falls into the excess material collecting container 22 through the excess material collecting opening 211, so that the excess material is collected.
In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. The utility model provides a powder packagine machine's dosing device which characterized in that: the material scraping device comprises a rack, a storage bin, a material supporting plate, a feeding turntable and a material scraping plate, wherein the storage bin and the material supporting plate are both arranged on the rack; the feeding rotary table is arranged between the discharge port of the storage bin and the material supporting plate, the frame is provided with a feeding rotary table driving mechanism capable of driving the feeding rotary table to rotate, and the rotating axis of the feeding rotary table is arranged along the vertical direction; the top of the feeding turntable is provided with an opening, the bottom of the feeding turntable is provided with a plurality of feeding parts which are sequentially arranged at equal intervals along the rotation axis of the feeding turntable, the top of each feeding part is provided with a feeding hole, the bottom of each feeding part is provided with a discharging hole, each feeding part is internally provided with a feeding cavity for communicating the feeding hole with the discharging hole, the feeding hole of each feeding part is communicated with the cavity of the feeding turntable, the opening edge of the discharging hole of each feeding part is in contact fit with the upper surface of the material supporting plate, and the discharging hole of each feeding part corresponds to the position of the; the scraping plate is arranged on the frame and is positioned in the cavity of the feeding turntable, and the scraping plate is positioned between the discharge port of the storage bin and the blanking port of the material supporting plate.
2. The dosing device of a powder packaging machine as claimed in claim 1, wherein: the feeding turntable driving mechanism comprises a rotating shaft, a feeding motor, a driving belt wheel, a driven belt wheel and an annular synchronous belt, the rotating shaft is rotatably installed on the rack and is arranged along the upper direction and the lower direction, the feeding turntable is installed at the upper end of the rotating shaft, the feeding motor is installed on the rack, the driving belt wheel is installed on a power output shaft of the feeding motor, the driven belt wheel is installed on the rotating shaft, and the driving belt wheel and the driven belt wheel jointly tension the annular synchronous belt.
3. The dosing device of a powder packaging machine as claimed in claim 1, wherein: the feeding part comprises a feeding pipe, a feeding block and a compression spring, the feeding pipe is arranged on the feeding turntable and is arranged along the vertical direction, and the upper end of the feeding pipe is communicated with the cavity of the feeding turntable; the feeding block is provided with a feeding through hole in the vertical direction, the lower end of the feeding pipe is positioned in the feeding through hole and is in contact fit with the inner wall of the feeding through hole, and the bottom surface of the feeding block is in contact fit with the upper surface of the material supporting plate; the feeding block consists of a spring positioning section and a limiting section, the upper end of the limiting section is integrally connected with the lower end of the spring positioning section, the size of the cross section of the limiting section is larger than that of the spring positioning section, and an annular limiting step is formed at the joint of the upper end of the limiting section and the lower end of the spring positioning section; the compression spring is sleeved on the spring positioning section, the upper end of the compression spring is connected with or in close contact with the bottom of the feeding turntable, and the lower end of the compression spring is connected with or in close contact with the annular limiting step.
4. The dosing device of powder packaging machine according to any of claims 1-3, characterized in that: the outer side edge of the material supporting plate is provided with an annular protective wall, the annular protective wall is provided with a residual material collecting opening, and a residual material collecting container is arranged below the residual material collecting opening.
5. The dosing device of powder packaging machine according to any of claims 1-3, characterized in that: the quantitative feeding device further comprises a blanking pipe, the blanking pipe is arranged on the lower side of the material supporting plate, the cross section area of the blanking pipe is gradually reduced from the upper end of the blanking pipe to the lower end of the blanking pipe, and the upper end of the blanking pipe is communicated with the blanking port of the material supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619609.5U CN210063431U (en) | 2019-04-30 | 2019-04-30 | Quantitative feeding device of powder packaging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619609.5U CN210063431U (en) | 2019-04-30 | 2019-04-30 | Quantitative feeding device of powder packaging machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210063431U true CN210063431U (en) | 2020-02-14 |
Family
ID=69450112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920619609.5U Active CN210063431U (en) | 2019-04-30 | 2019-04-30 | Quantitative feeding device of powder packaging machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210063431U (en) |
-
2019
- 2019-04-30 CN CN201920619609.5U patent/CN210063431U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210063453U (en) | Automatic powder packaging machine | |
| CN102113447B (en) | Full-automatic spiral edible mushroom cultivating material bagging machine | |
| CN110422360B (en) | Self-adhesive bag reciprocating type packaging machine | |
| CN210063431U (en) | Quantitative feeding device of powder packaging machine | |
| CN115180235B (en) | Multifunctional single-row strip bag production equipment | |
| CN214930795U (en) | Weighing and packaging machine for bolt production line | |
| CN208906806U (en) | A kind of automatic filling sealing machine | |
| CN112660446B (en) | Vertical pump valve filling mechanism of high-speed liquid packaging machine | |
| CN210944811U (en) | Filling equipment of liquid product workshop | |
| CN210656116U (en) | Automatic change filling and encapsulation equipment | |
| CN217261038U (en) | Ton bag automatic bagging, quick and efficient filling equipment | |
| CN112849459A (en) | Weighing and packaging machine for bolt production line | |
| CN205294374U (en) | Full -automatic packing sack filling machine of cylindricality paper container | |
| CN211919040U (en) | Microbial fertilizer powder filling machine | |
| CN102275638B (en) | Rotary discharging mechanism and discharging method thereof | |
| CN219487769U (en) | Quantitative packaging machine for powder coating | |
| CN215922604U (en) | Filling machine with granular material quantitative filling mechanism | |
| CN217598882U (en) | High-efficient equipment for packing of medicine | |
| CN220499345U (en) | Cutting device capable of automatically correcting deviation | |
| CN219948722U (en) | Full-automatic packaging equipment | |
| CN219904940U (en) | Powder racking machine | |
| CN220948783U (en) | Packaging device for pork powder production | |
| CN218967260U (en) | Full-automatic packaging machine | |
| CN209023188U (en) | A kind of adjustable push type broach reciprocating motion device of full automatic packaging of packaging bandwidth | |
| CN219097157U (en) | Material receiving rack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |