CN108295932A - A kind of multistage grinding device of lubricating grease processing - Google Patents
A kind of multistage grinding device of lubricating grease processing Download PDFInfo
- Publication number
- CN108295932A CN108295932A CN201810114584.3A CN201810114584A CN108295932A CN 108295932 A CN108295932 A CN 108295932A CN 201810114584 A CN201810114584 A CN 201810114584A CN 108295932 A CN108295932 A CN 108295932A
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- Prior art keywords
- motor
- grinding
- roller
- lubricating grease
- case
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/54—Cleaning with beating devices
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention relates to a kind of grinding device more particularly to a kind of multistage grinding devices of lubricating grease processing.The technical problem to be solved in the present invention is to provide a kind of grinding efficiencies, and lubricating grease high, that grinding effect is good, job costs are low is processed with multistage grinding device.In order to solve the above-mentioned technical problem, the present invention provides such a lubricating grease to process with multistage grinding device, include grinding case, rewinding case, feed pipe, electric pushrod, support device, holder, electric rotating machine, material storing box, slide plate, friction plate, cylinder, electromagnet I, spring, iron block, irony strainer, roller I, motor I, motor II and roller II, bottom is provided with rewinding case in grinding case, it is provided with motor I and motor II above rewinding case, motor I is arranged on the right side of motor II, I rear of motor is provided with roller I, and II rear of motor is provided with roller II.Invention achieves grinding efficiency height, the effects that grinding effect is good, job costs are low.
Description
Technical field
The present invention relates to a kind of grinding device more particularly to a kind of multistage grinding devices of lubricating grease processing.
Background technology
Lubricating grease is the grease-like semisolid of stiff.For the friction part of machinery, lubrication and sealing function are played.It is also used for
Filling gap and anti-rust action are played in metal surface.Mainly modulated by mineral oil and thickening agent.Most lubricating grease are used for
Lubrication, referred to as antifriction grease.Antifriction grease mainly plays reduction mechanical friction, prevents the effect of mechanical wear while also simultaneous
Act the protective effect for preventing metal erosion and sealing and dustproof effect.There are some lubricating grease to be mainly used to prevent metal rusting or corruption
Erosion, referred to as protects lubricating grease.Such as industrial vaseline etc. has a small number of lubricating grease to be specially used as sealing use, referred to as packing grease, such as
Thread compound.Lubricating grease is the substance of semi-solid mostly, has unique mobility.
Grinding is i.e. using applying or be press-fitted the abrasive grain on lap tool, the phase by lap tool with workpiece under a certain pressure
The finished machined that movement carries out finished surface.Grinding can be used for processing various metals and nonmetallic materials, the surface of processing
Shape has plane, inside and outside cylindrical surface and circular conical surface, convex, concave spherical surface, screw thread, the flank of tooth and its alloytype face.Machining accuracy is up to IT5
~01, surface roughness is up to Ra0.63~0.01 micron.Grinding method generally can be divided into it is wet grind, dry grind grinds 3 classes with half-dried.
Existing grinding device haves the shortcomings that grinding efficiency is low, grinding effect is poor, job costs are high, therefore there is an urgent need for designs
A kind of multistage grinding device of the lubricating grease processing that grinding efficiency is high, grinding effect is good, job costs are low.
Invention content
(1) technical problems to be solved
That there are grinding efficiencies in order to overcome existing grinding device is low by the present invention, grinding effect is poor, job costs are high lacks
Point, the technical problem to be solved in the present invention is to provide a kind of grinding efficiencies, and lubricating grease high, that grinding effect is good, job costs are low adds
The multistage grinding device of work.
(2) technical solution
In order to solve the above technical problem, the present invention provides such a lubricating grease to process with multistage grinding device, packet
Included grinding case, rewinding case, feed pipe, electric pushrod, support device, holder, electric rotating machine, material storing box, slide plate, friction plate,
Cylinder, electromagnet I, spring, iron block, irony strainer, roller I, motor I, motor II and roller II grind bottom in case and are provided with rewinding
Case, rewinding case top are provided with motor I and motor II, and motor I is arranged on the right side of motor II, and I rear of motor is provided with roller I,
II rear of motor is provided with roller II, and roller I and II top of roller are provided with feed pipe, irony strainer, irony are provided with above feed pipe
Strainer setting is provided with electric pushrod on grinding case inner right wall above irony strainer, electric pushrod setting is left in grinding case
On wall, electric pushrod right end is connected with electromagnet I, and I bottom of electromagnet is provided with spring, and lower spring end is connected with iron block, electronic
It is provided with slide plate above push rod, cylinder is provided on the right side of electric pushrod, on grinding case inner right wall, cylinder left end connects for cylinder setting
It is connected to friction plate, friction plate is arranged above slide plate, and friction plate is contacted with slide plate, and grinding case upper left side is provided with holder, holder
Right side is provided with electric rotating machine, and electric rotating machine right end is connected with material storing box, support device, support device are provided with below material storing box
It is arranged on holder, support device includes pallet and steel ball, and steel ball is provided in pallet, and pallet is to be flexibly connected with steel ball.
Preferably, further include having vibrating motor, vibrating motor is arranged in irony strainer left end.
Preferably, further include having electromagnet II, the setting of electromagnet II is between irony strainer and grinding right wall of box, electromagnet
II, which is powered, takes magnetic attraction irony strainer.
Preferably, grinding box lumber matter is stainless steel.
Operation principle：When using the present apparatus, lubricating grease is added in material storing box, then starts electric rotating machine and drives material storing box
It rotates, support device material storing box, the steel ball in support device efficiently reduces resistance when material storing box rotation, works as material storing box
Opening when turning to lower section, lubricating grease is flowed to from opening between slide plate and friction plate, with the lasting rotation of material storing box, lubrication
Fat persistently flows out, and then starts cylinder and persistently elongates or shortens, drives friction plate to move up and down, between slide plate and friction plate
Lubricating grease is ground, and then lubricating grease flows on irony strainer, is flowed into feed pipe using irony strainer, is then started motor
I drive roller I rotates counterclockwise, start motor II and roller II is driven to rotate clockwise so that roller I and roller II from feed pipe to flowing out
Lubricating grease carries out secondary grinding, and last lubricating grease flows into rewinding case.When the lubricating grease in material storing box flows completely out, and it is flowed into
When in rewinding case, electric rotating machine and cylinder are stopped, and then start electric pushrod and persistently shorten or extend, drive electromagnet I
Side-to-side movement, while electromagnet I continues power on/off, under the attraction of electromagnet I and the elastic force effect of spring, drives on iron block
The larger lubricating grease particle on irony strainer is patted in lower movement so that the larger lubricating grease particle on irony strainer is complete
Portion flows into rewinding case.When on irony strainer almost without lubricating grease particle, electromagnet I is stopped, and starts electric pushrod
Electromagnet I is driven to reset, then motor I and motor II are stopped, and work finishes.
Because further including having vibrating motor, vibrating motor is arranged in irony strainer left end, so when irony strainer is filtering
It, can be with Vibration on Start-up motor when lubricating grease so that lubricating grease particle is not easy to accumulate on irony strainer.
Because further including having electromagnet II, the setting of electromagnet II is between irony strainer and grinding right wall of box, electromagnet II
Energization takes magnetic attraction irony strainer, it is possible to as needed so that the power-off of electromagnet II loses magnetism, not attract irony
Strainer is cleaned with being convenient for changing irony strainer or removing irony strainer.
Because grinding box lumber matter is stainless steel, the service life is longer for grinding case.
(3) advantageous effect
Invention achieves grinding efficiency height, the effects that grinding effect is good, job costs are low.
Description of the drawings
Fig. 1 is the first main structure diagram of the present invention.
Fig. 2 is the left view structural representation of support device of the present invention.
Fig. 3 is second of main structure diagram of the present invention.
Fig. 4 is the third main structure diagram of the present invention.
Label in attached drawing be：1- grinds case, 2- rewinding casees, 3- feed pipes, 4- electric pushrods, 5- support devices, 51- supports
Disk, 52- steel balls, 6- holders, 7- electric rotating machines, 8- material storing box, 9- openings, 10- slide plates, 11- friction plates, 12- cylinders, 13- electricity
Magnet I, 14- springs, 15- iron blocks, 16- irony strainers, 17- rollers I, 18- motors I, 19- motors II, 20- rollers II, 21- vibration electricity
Machine, 22- electromagnet II.
Specific implementation mode
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1
A kind of multistage grinding device of lubricating grease processing includes as shown in Figs 1-4 grinding case 1, rewinding case 2, feed pipe
3, electric pushrod 4, support device 5, holder 6, electric rotating machine 7, material storing box 8, slide plate 10, friction plate 11, cylinder 12, electromagnet I
13, spring 14, iron block 15, irony strainer 16, roller I 17, motor I 18, motor II 19 and roller II 20 grind bottom setting in case 1
There are rewinding case 2,2 top of rewinding case to be provided with motor I 18 and motor II 19, motor I 18 is arranged in the right side of motor II 19, motor
I 18 rears are provided with roller I 17, and II 19 rear of motor is provided with roller II 20, and roller I 17 and II 20 top of roller are provided with feed pipe 3, into
3 top of expects pipe is provided with irony strainer 16, and the setting of irony strainer 16 is on grinding 1 inner right wall of case, the 16 top setting of irony strainer
There is electric pushrod 4, for the setting of electric pushrod 4 on grinding 1 inner left wall of case, 4 right end of electric pushrod is connected with electromagnet I 13, electromagnetism
I 13 bottom of iron is provided with spring 14, and 14 lower end of spring is connected with iron block 15, and 4 top of electric pushrod is provided with slide plate 10, electronic to push away
4 right side of bar is provided with cylinder 12, and for the setting of cylinder 12 on grinding 1 inner right wall of case, 12 left end of cylinder is connected with friction plate 11, friction
Plate 11 is arranged above slide plate 10, and friction plate 11 is contacted with slide plate 10, and 1 upper left side of grinding case is provided with holder 6,6 right side of holder
It is provided with electric rotating machine 7,7 right end of electric rotating machine is connected with material storing box 8, and 8 lower section of material storing box is provided with support device 5, support dress
Set 5 settings on the frame 6, support device 5 includes pallet 51 and steel ball 52, is provided with steel ball 52 in pallet 51, pallet 51 with
Steel ball 52 is flexible connection.
Further include having vibrating motor 21, vibrating motor 21 is arranged in 16 left end of irony strainer.
Further include having electromagnet II 22, the setting of electromagnet II 22 is between irony strainer 16 and grinding 1 right wall of case, electromagnet
II 22, which are powered, takes magnetic attraction irony strainer 16.
Grinding 1 material of case is stainless steel.
Operation principle：When using the present apparatus, lubricating grease is added in material storing box 8, then starts electric rotating machine 7 and drives storing
Case 8 rotates, and support device 5 supports material storing box 8, the steel ball 52 in support device 5 to efficiently reduce resistance when material storing box 8 rotates
Power, when the opening 9 of material storing box 8 turns to lower section, lubricating grease is flowed to from opening 9 between slide plate 10 and friction plate 11, with storage
The lasting rotation of hopper 8, lubricating grease persistently flow out, and then start cylinder 12 and persistently elongate or shorten, drive about 11 friction plate
Movement, the lubricating grease between slide plate 10 and friction plate 11 are ground, and then lubricating grease flows on irony strainer 16, using
Irony strainer 16 flows into feed pipe 3, then starts motor I 18 and roller I 17 is driven to rotate counterclockwise, and starts motor II 19 and drives roller II
20 rotate clockwise so that II 20 pairs of lubricating grease flowed out from feed pipe 3 of roller I 17 and roller carry out secondary grinding, last lubricating grease
Flow into rewinding case 2.When the lubricating grease in material storing box 8 flows completely out, and is flowed into rewinding case 2, electric rotating machine 7 and cylinder
12 are stopped, and then start electric pushrod 4 and persistently shorten or extend, drive I 13 side-to-side movement of electromagnet, while electromagnet I
13 continue power on/off, under the attraction of electromagnet I 13 and the elastic force effect of spring 14, drive iron block 15 to move up and down, to iron
Larger lubricating grease particle on matter strainer 16 is patted so that the larger lubricating grease particle on irony strainer 16, which all flows into, to be received
In hopper 2.When on irony strainer 16 almost without lubricating grease particle, electromagnet I 13 is stopped, and starts 4 band of electric pushrod
Dynamic electromagnet I 13 resets, and then motor I 18 and motor II 19 are stopped, and work finishes.
Because further including having vibrating motor 21, vibrating motor 21 is arranged in 16 left end of irony strainer, so working as irony strainer
16 when filtering lubricating grease, can be with Vibration on Start-up motor 21 so that lubricating grease particle is not easy to accumulate on irony strainer 16.
Because further including having electromagnet II 22, the setting of electromagnet II 22 is between irony strainer 16 and grinding 1 right wall of case, electricity
The energization of magnet II 22 takes magnetic attraction irony strainer 16, it is possible to as needed so that the power-off of electromagnet II 22 loses magnetic
Property, do not attract irony strainer 16, is cleaned with being convenient for changing irony strainer 16 or removing irony strainer 16.
Because grinding 1 material of case is stainless steel, the service life is longer for grinding case 1.
The preferred embodiment of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, several deformations can also be made, improves and substitutes, these belong to this hair
Bright protection domain.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (4)
1. a kind of multistage grinding device of lubricating grease processing, which is characterized in that include grinding case (1), rewinding case (2), charging
Manage (3), electric pushrod (4), support device (5), holder (6), electric rotating machine (7), material storing box (8), slide plate (10), friction plate
(11), cylinder (12), electromagnet I (13), spring (14), iron block (15), irony strainer (16), roller I (17), motor I (18), electricity
Machine II (19) and roller II (20), grinding case (1) interior bottom are provided with rewinding case (2), motor I are provided with above rewinding case (2)
(18) it is arranged on the right side of motor II (19) with motor II (19), motor I (18), motor I (18) rear is provided with roller I (17),
Motor II (19) rear is provided with roller II (20), is provided with feed pipe (3) above roller I (17) and roller II (20), on feed pipe (3)
Side is provided with irony strainer (16), and irony strainer (16) setting is on grinding case (1) inner right wall, setting above irony strainer (16)
There is electric pushrod (4), on grinding case (1) inner left wall, electric pushrod (4) right end is connected with electromagnet I for electric pushrod (4) setting
(13), electromagnet I (13) bottom is provided with spring (14), and spring (14) lower end is connected with iron block (15), electric pushrod (4) top
It is provided with slide plate (10), cylinder (12) is provided on the right side of electric pushrod (4), cylinder (12) is arranged on grinding case (1) inner right wall,
Cylinder (12) left end is connected with friction plate (11), and friction plate (11) setting is above slide plate (10), friction plate (11) and slide plate
(10) it contacts, grinding case (1) upper left side is provided with holder (6), and electric rotating machine (7), electric rotating machine are provided on the right side of holder (6)
(7) right end is connected with material storing box (8), and support device (5) is provided with below material storing box (8), and support device (5) is arranged in holder
(6) on, support device (5) includes pallet (51) and steel ball (52), is provided with steel ball (52) in pallet (51), pallet (51) with
Steel ball (52) is flexible connection.
2. a kind of multistage grinding device of lubricating grease processing according to claim 1, which is characterized in that further include having vibration
Motor (21), vibrating motor (21) are arranged in irony strainer (16) left end.
3. a kind of multistage grinding device of lubricating grease processing according to claim 1, which is characterized in that further include having electromagnetism
Iron II (22), electromagnet II (22) setting is between irony strainer (16) and grinding case (1) right wall, electromagnet II (22) energization band
Upper magnetic attraction irony strainer (16).
4. a kind of multistage grinding device of lubricating grease processing according to claim 1, which is characterized in that grinding case (1) material
Matter is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810114584.3A CN108295932A (en) | 2018-02-06 | 2018-02-06 | A kind of multistage grinding device of lubricating grease processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810114584.3A CN108295932A (en) | 2018-02-06 | 2018-02-06 | A kind of multistage grinding device of lubricating grease processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108295932A true CN108295932A (en) | 2018-07-20 |
Family
ID=62864564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810114584.3A Pending CN108295932A (en) | 2018-02-06 | 2018-02-06 | A kind of multistage grinding device of lubricating grease processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108295932A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205628084U (en) * | 2016-03-31 | 2016-10-12 | 刘蓉蓉 | Lubricating grease high -efficient grinding device |
| CN205630155U (en) * | 2016-04-01 | 2016-10-12 | 张文海 | Fast sharpening device |
| CN205700969U (en) * | 2016-04-29 | 2016-11-23 | 龙南县雪弗特新材料科技有限公司 | A kind of multi-functional polyurea grease processing lapping device |
| CN205695242U (en) * | 2016-04-26 | 2016-11-23 | 江西省丰达农业发展有限公司 | A kind of booth vegetable is cultivated and is used insect-pest device |
| CN205708958U (en) * | 2016-04-26 | 2016-11-23 | 江西省丰达农业发展有限公司 | A kind of agrocyb eaegerita produces with high-volume conveying arrangement |
| CN205851344U (en) * | 2016-06-30 | 2017-01-04 | 贵州省凤冈县浪竹有机茶业有限公司 | Tea screening machine |
| CN206526848U (en) * | 2017-02-19 | 2017-09-29 | 朱柳玲 | A kind of gardens soil block fast-crushing device |
| CN206713474U (en) * | 2017-04-07 | 2017-12-08 | 新昌县欧赛机械有限公司 | A kind of agricultural uses straw shredding mechanism |
| CN206896538U (en) * | 2016-11-30 | 2018-01-19 | 上海孤蓬机械科技有限公司 | A kind of use for laboratory chlorination equipment |
| CN107627494A (en) * | 2017-09-07 | 2018-01-26 | 万日金 | A kind of polybag crushes retracting device |
-
2018
- 2018-02-06 CN CN201810114584.3A patent/CN108295932A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205628084U (en) * | 2016-03-31 | 2016-10-12 | 刘蓉蓉 | Lubricating grease high -efficient grinding device |
| CN205630155U (en) * | 2016-04-01 | 2016-10-12 | 张文海 | Fast sharpening device |
| CN205695242U (en) * | 2016-04-26 | 2016-11-23 | 江西省丰达农业发展有限公司 | A kind of booth vegetable is cultivated and is used insect-pest device |
| CN205708958U (en) * | 2016-04-26 | 2016-11-23 | 江西省丰达农业发展有限公司 | A kind of agrocyb eaegerita produces with high-volume conveying arrangement |
| CN205700969U (en) * | 2016-04-29 | 2016-11-23 | 龙南县雪弗特新材料科技有限公司 | A kind of multi-functional polyurea grease processing lapping device |
| CN205851344U (en) * | 2016-06-30 | 2017-01-04 | 贵州省凤冈县浪竹有机茶业有限公司 | Tea screening machine |
| CN206896538U (en) * | 2016-11-30 | 2018-01-19 | 上海孤蓬机械科技有限公司 | A kind of use for laboratory chlorination equipment |
| CN206526848U (en) * | 2017-02-19 | 2017-09-29 | 朱柳玲 | A kind of gardens soil block fast-crushing device |
| CN206713474U (en) * | 2017-04-07 | 2017-12-08 | 新昌县欧赛机械有限公司 | A kind of agricultural uses straw shredding mechanism |
| CN107627494A (en) * | 2017-09-07 | 2018-01-26 | 万日金 | A kind of polybag crushes retracting device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180720 |
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| RJ01 | Rejection of invention patent application after publication |