CN204933802U - Gun head of foaming machine - Google Patents
Gun head of foaming machine Download PDFInfo
- Publication number
- CN204933802U CN204933802U CN201520646140.6U CN201520646140U CN204933802U CN 204933802 U CN204933802 U CN 204933802U CN 201520646140 U CN201520646140 U CN 201520646140U CN 204933802 U CN204933802 U CN 204933802U
- Authority
- CN
- China
- Prior art keywords
- rifle head
- rifle
- nozzle
- charging aperture
- ejiction opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005187 foaming Methods 0.000 title claims abstract description 35
- 239000013043 chemical agent Substances 0.000 claims abstract description 47
- 239000012459 cleaning agent Substances 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 abstract description 6
- 239000003814 drug Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/76—Mixers with stream-impingement mixing head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7404—Mixing devices specially adapted for foamable substances
- B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/76—Mixers with stream-impingement mixing head
- B29B7/7631—Parts; Accessories
- B29B7/7652—Construction of the discharge orifice, opening or nozzle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/802—Constructions or methods for cleaning the mixing or kneading device
- B29B7/803—Cleaning of mixers of the gun type, stream-impigement type, mixing heads
- B29B7/806—Cleaning of the discharge opening, e.g. orifice of the dispenser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/76—Mixers with stream-impingement mixing head
- B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
- B29B7/7684—Parts; Accessories
- B29B7/7689—Plunger constructions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The utility model provides a rifle head of foaming machine for spout behind two kinds of chemical agent of mixture, the rifle head of this foaming machine contains a rifle head body, a nozzle of being connected with this rifle head body, a rifle shaft of stretching out and putting in this internal rifle head, this rifle head body includes the mixing tank of an axial break-over this rifle head body, and carry two kinds of chemical agent respectively and with a first feed channel and a second feed channel of this mixing tank intercommunication, this nozzle includes a nozzle body, and one is connected with this nozzle body and defines a nozzle outer wall in clean space, this rifle shaft slides along this mixing tank and lets chemical agent spout after mixing in this mixing tank. The utility model discloses a nozzle forms the clean space that supplies clean medicament to get into with rifle head body to this nozzle outer wall design of cooperation this nozzle is convenient for clean, avoids chemical agent to remain.
Description
Technical field
The utility model relates to a kind of rifle head, particularly relates to a kind of rifle head of foaming machine.
Background technology
Consult Fig. 1,2, existing foaming machine comprises the second gun barrel 121 that exports a kind of a kind of second chemical agent of first gun barrel 111, output of the first chemical agent, and a rifle head be connected with this first gun barrel 111 and this second gun barrel 121, export after becoming can be used for the foaming material packed after this first chemical agent and this second chemical agent mix in this rifle head, and use a kind of cleaning agent to clean after a procedure.
Specifically, the rifle head of existing foaming machine comprises a rifle head body 14, and a rifle axle 15.
This rifle head body 14 comprises mixing channel 141, first feed channel 142 of this rifle head body 14 of an axial break-through, and second feed channel 143.This mixing channel 141 has an ejiction opening 144, substrate mouth 145 in contrast to this ejiction opening 144, and a cleaning agent feed channel 140.
This first feed channel 142 has one and to be positioned between this ejiction opening 144 with substrate mouth 145 and the first charging aperture 146 be communicated with this mixing channel 141, and one in contrast to this first charging aperture 146 and the first connector 147 be connected with this first gun barrel 111 separatably.This first chemical agent can flow into this mixing channel 141 by this first gun barrel 111 through this first connector 147 and this first charging aperture 146.
This second feed channel 143 has one and to be positioned between this ejiction opening 144 with this substrate mouth 145 and the second charging aperture 148 be communicated with this mixing channel 141, and one in contrast to this second charging aperture 148 and the second connector 149 be connected with this second gun barrel 121 separatably.This second chemical agent can flow into this mixing channel 141 by this second gun barrel 121 through this second connector 149 and this second charging aperture 148.
This cleaning agent feed channel 140 corresponds to this rifle head body 14 of this ejiction opening 144 break-through from extraneous, and use for injecting this cleaning agent during this rifle head body 14 clean, this part renews after please holding.
This rifle axle 15 comprises one and stretches and be placed in this mixing channel 141 and can be connected to this rifle axle body 151 front end along the rifle axle body 151, of this mixing channel 141 slippage and can be driven by this rifle axle body 151 and make this ejiction opening 144, this first charging aperture 146 and this second charging aperture 148 wherein any one closure bar 152 being closed and opening, and a band motion block 153 being connected to this rifle axle body 151 rear end.
This band motion block 153 drives this rifle axle body 151 and this closure bar 152 and makes this closure bar 152 relative to this first charging aperture 146, this second charging aperture 148 and this ejiction opening 144 move between a feed entrance point and a detent position, and when this closure bar 152 is at this feed entrance point, this closure bar 152 is relatively near this substrate mouth 145, and make this first chemical agent flow into this mixing channel 141 by this first gun barrel 111 through this first connector 147 and this first charging aperture 146, and this second chemical agent flows into this mixing channel 141 by this second gun barrel 121 through this second connector 149 and this second charging aperture 148, and then allow this first chemical agent mix mutually with this second chemical agent, simultaneously, this first chemical agent mixed and this second chemical agent spray from this ejiction opening 144, form the foaming material for packing.
When required foaming material enough after, push this closure bar 152 and be positioned at this detent position, now, this band motion block 153 drives this rifle axle body 151 to move toward this ejiction opening 144 direction, this closure bar 152 is made to be revealed in outside this ejiction opening 144, and make this ejiction opening 144, this first charging aperture 146 and this second charging aperture 148 in closed state, and then this first chemical agent, this second chemical agent cannot be continued to enter in this mixing channel 141, meanwhile, this ejiction opening 144 also no longer exports this first chemical agent mixed and this second chemical agent.
The rifle head of existing foaming machine can connect this first gun barrel 111 and this second gun barrel 121 really, and then exports after allowing this first chemical agent and this second chemical agent mix the foaming material becoming can be used for afterwards to pack in this rifle head.
Consult Fig. 3, but, when existing rifle head needs clean after a procedure, a Clean cover 16 must be socketed on this rifle head body 14, wherein, this Clean cover 16 comprises the clean space 161 that is held the ejiction opening 144 of this rifle head body 14 of cover, and the cleaning agent sprue channel 162 of this cleaning agent of injection, and allow this cleaning agent after this cleaning agent sprue channel 162 stores up this clean space 161 full through this cleaning agent feed channel 140, this rifle head body 14 front end, particularly this ejiction opening 144 place just can be made to allow this cleaning agent soak and to complete the clean of this rifle head.This process is except needing additionally this Clean cover 16 sheathed and increase except operating process, this rifle head body 14 due to this rifle head existing is in funnel-form to the aspect of this substrate mouth 145 direction indent, even if therefore this cleaning agent store up that full whole clean space 161 is also very difficult to be cleaned out this rifle head body 14 completely completely.
Therefore the rifle head of existing foaming machine needs to improve, to promote operated by personnel, clean convenience.
Summary of the invention
Therefore, the purpose of this utility model is to provide a kind of rifle head with the foaming machine of cleaning function.
So the utility model provides a kind of rifle head of foaming machine, this foaming machine comprises one and exports a kind of first gun barrel of the first chemical agent, the second gun barrel of a kind of second chemical agent of output, and one exports a kind of clean gun barrel of cleaning agent, the rifle head of this foaming machine comprise a rifle head body, nozzle be connected with this rifle head body, one stretch and be placed in the intrinsic rifle axle of rifle head.
This rifle head body comprises mixing channel, first feed channel of this rifle head body of an axial break-through, and second feed channel, and this mixing channel has an ejiction opening, and a substrate mouth in contrast to this ejiction opening.
This first feed channel has one and to be positioned between this ejiction opening with this substrate mouth and the first charging aperture be communicated with this mixing channel, and one in contrast to this first charging aperture and the first connector be connected with this first gun barrel separatably.
This second feed channel has one and to be positioned between this ejiction opening with this substrate mouth and the second charging aperture be communicated with this mixing channel, and one in contrast to this second charging aperture and the second connector be connected with this second gun barrel separatably.
This nozzle is connected with this rifle head body and comprises a nozzle body, and one to be connected with this nozzle body and to define the outer nozzle wall of a clean space, this nozzle body has a cleaning agent charging aperture be communicated with this clean space, and in contrast to this cleaning agent charging aperture and the separatably cleaning agent connector that is connected of gun barrel clean with this, this outer nozzle wall has the nozzle open end that corresponds to this ejiction opening.
This rifle axle comprises one and stretches and be placed in this mixing channel and can be connected to this rifle axle body front end along the rifle axle body, of this mixing channel slippage and can be driven by this rifle axle body and make this nozzle open end, this ejiction opening, this first charging aperture and this second charging aperture wherein arbitrary closure bar being closed and opening, and is connected to the band motion block of this rifle axle body rear end.
The beneficial effects of the utility model are: this clean space defined by this outer nozzle wall and this nozzle body cleans the closure bar of this nozzle body and rifle axle, simplify operation and the cleaning course of rifle head.
Accompanying drawing explanation
Of the present utility model other feature and effect, by reference to graphic preferred embodiment describe in detail in clearly present, wherein:
Fig. 1 is a kind of cross-sectional schematic, and a kind of rifle head of known foaming machine is described, and illustrates that the closure bar of a rifle axle of this rifle head is at a feed entrance point,
Fig. 2 is a kind of cross-sectional schematic, illustrates that the closure bar of this rifle axle of the rifle head of this known foaming machine is at a detent position,
Fig. 3 is a kind of cross-sectional schematic, illustrates that the rifle head of this known foaming machine is combined with a Clean cover,
Fig. 4 is a kind of cross-sectional schematic, and an embodiment of the rifle head of the utility model foaming machine is described, and illustrates that a closure bar of a rifle axle of this rifle head is at a feed entrance point, and
Fig. 5 is a kind of cross-sectional schematic, illustrates that this closure bar of this embodiment of the rifle head of the utility model foaming machine is at a detent position.
Detailed description of the invention
Consult Fig. 3, 4, the foaming machine of one embodiment of the rifle head of the utility model foaming machine comprises the first gun barrel 21 that exports a kind of first chemical agent, second gun barrel 31 of a kind of second chemical agent of output, and the clean gun barrel 41 of an a kind of cleaning agent of output, the rifle head of this foaming machine comprises a rifle head body 5, a nozzle 6, a rifle axle 7, this first gun barrel 21, second gun barrel 31 and clean gun barrel 41 are connected with the rifle head of this foaming machine, export after becoming can be used for the foaming material packed after allowing this first chemical agent and this second chemical agent mix in this rifle head, and it is clean to input this cleaning agent from this clean gun barrel 41 after a procedure, maintain the smooth and easy of operation.
This rifle head body 5 comprises a mixing channel 51, first feed channel 52, second feed channel 53, trunk portion 55, and one to extend forward from this trunk portion 55 and to become the convex body portion 54 of butt vertebra shape, the axial break-through of this mixing channel 51 this trunk portion 55 and this convex body portion 54, this mixing channel 51 has the ejiction opening 511 that is positioned at this convex body portion 54, and a substrate mouth 512 being positioned at this trunk portion 55.
This first feed channel 52 has one and to be positioned between this ejiction opening 511 with this substrate mouth 512 and the first charging aperture 521 be communicated with this mixing channel 51, and one in contrast to this first charging aperture 521 and the first connector 522 be connected with this first gun barrel 21 separatably.This first chemical agent flows into this mixing channel 51 by this first gun barrel 21 through this first connector 522 and this first charging aperture 521.
This second feed channel 53 has one and to be positioned between this ejiction opening 511 with this substrate mouth 512 and the second charging aperture 531 be communicated with this mixing channel 51, and one in contrast to this second charging aperture 531 and the second connector 532 be connected with this second gun barrel 31 separatably.This second chemical agent flows into this mixing channel 51 by this second gun barrel 31 through this second connector 532 and this second charging aperture 531.
This nozzle 6 is connected with this rifle head body 5 and comprises a nozzle body 61, and one from the outward extending outer nozzle wall 62 of this nozzle body 61 one-tenth arc lowland, this outer nozzle wall 62 is connected with this nozzle body 61 and defines a clean space 63, this nozzle body 61 has a cleaning agent charging aperture 611 be communicated with this clean space 63, and in contrast to this cleaning agent charging aperture 611 and separatably cleaning agent connector 612 that is connected of gun barrel 41 clean with this, this outer nozzle wall 62 has the nozzle open end 631 that corresponds to this ejiction opening 511.
This rifle axle 7 comprises one and stretches and be placed in this mixing channel 51 and can be connected to this rifle axle body 71 front end along the rifle axle body 71, of this mixing channel 51 slippage and can be driven by this rifle axle body 71 and make this nozzle open end 631, this ejiction opening 511, this first charging aperture 521 and this second charging aperture 531 wherein any one closure bar 72 being closed and opening, and is connected to the band motion block 73 of this rifle axle body 71 rear end.
This band motion block 73 drives this rifle axle body 71 and this closure bar 72 and makes this closure bar 72 relative to this first charging aperture 521, this second charging aperture 531 and this ejiction opening 511 move between a feed entrance point and a detent position, and this closure bar 72 is when this feed entrance point, this closure bar 72 is relatively near this substrate mouth 512, and make this first chemical agent flow into this mixing channel 51 by this first gun barrel 21 through this first connector 522 and this first charging aperture 521, and this second chemical agent flows into this mixing channel 51 by this second gun barrel 31 through this second connector 532 and this second charging aperture 531, and then allow this first chemical agent mix mutually with this second chemical agent, simultaneously, this first chemical agent mixed and this second chemical agent spray from this ejiction opening 511, form the foaming material for packing.
When required foaming material enough after, push this closure bar 72 and be positioned at this detent position, now, this band motion block 73 drives this rifle axle body 71 to move toward this ejiction opening 511 direction, this closure bar 72 is made to be revealed in outside this ejiction opening 511, and make this nozzle open end 631, this ejiction opening 511, this first charging aperture 521 and this second charging aperture 531 in closed state, and then this first chemical agent, this second chemical agent cannot be continued to enter in this mixing channel 51, meanwhile, this ejiction opening 511 also no longer exports this first chemical agent mixed and this second chemical agent.
And when the clean rifle head of needs, push this closure bar 72 and be positioned at this detent position, now can directly by this cleaning agent by this clean gun barrel 41 through this cleaning agent connector 612 and this cleaning agent charging aperture 611, flow into and store up this clean space 63 full, and allow this rifle head body 5 front end be soaked in this cleaning agent, complete the clean of this nozzle body 61 and this closure bar 72.
Especially, have in butt vertebra shape due to this rifle head body 5 and be formed with this convex body portion 54 of this ejiction opening 511, and the remaining quantity of this first chemical agent mixed and this second chemical agent sprayed from this ejiction opening 511 can significantly be reduced, reduce clean difficulty, simultaneously, also because this convex body portion 54 of this rifle head body 5 is in butt vertebra shape, so this cleaning agent when soaking this convex body portion 54 of this rifle head body 14 can be made obtaining, be easy to residual few chemical agent to remove, and complete overall cleaning operation.
In sum, the rifle head of the utility model foaming machine cleans this closure bar 72 by this outer nozzle wall 62 with this clean space 63 that this nozzle body 61 defines, simplify rifle head overall cleaning course after the activation, and this rifle head body 5 has this convex body portion 54 in butt vertebra shape, this first chemical agent and this second chemical agent remaining quantity are reduced, improve bubbling efficiency, easy to clean based on the design in this convex body portion 54 while of more, therefore really can reach the purpose of this utility model.
Claims (3)
1. the rifle head of a foaming machine, this foaming machine comprises one and exports a kind of first gun barrel of the first chemical agent, the second gun barrel of a kind of second chemical agent of output, and the clean gun barrel of an a kind of cleaning agent of output, it is characterized in that the rifle head of this foaming machine comprises:
A rifle head body, comprise a mixing channel, first feed channel, and second feed channel, axial this rifle head body of break-through of this mixing channel also has an ejiction opening, and a substrate mouth in contrast to this ejiction opening, this first feed channel has one and is positioned at the first charging aperture be also communicated with this mixing channel between this ejiction opening with this substrate mouth, and one in contrast to this first charging aperture and the first connector be connected with this first gun barrel separatably, this second feed channel has one and is positioned at the second charging aperture be also communicated with this mixing channel between this ejiction opening with this substrate mouth, and one in contrast to this second charging aperture and the second connector be connected with this second gun barrel separatably,
A nozzle, be connected with this rifle head body and comprise a nozzle body, and one to be connected with this nozzle body and to define the outer nozzle wall of a clean space, this nozzle body has a cleaning agent charging aperture be communicated with this clean space, and in contrast to this cleaning agent charging aperture and the separatably cleaning agent connector that is connected of gun barrel clean with this, this outer nozzle wall has the nozzle open end that corresponds to this ejiction opening, and
A rifle axle, comprise one stretch be placed in this mixing channel and can along the rifle axle body of this mixing channel slippage, one be connected to this rifle axle body front end and can be driven by this rifle axle body and make this nozzle open end, this ejiction opening, this first charging aperture and this second charging aperture wherein any one closure bar being closed and opening, and be connected to the band motion block of this rifle axle body rear end.
2. the rifle head of foaming machine according to claim 1, it is characterized in that: this rifle head body also comprises a trunk portion, and one to extend forward from this trunk portion and to become the convex body portion of butt vertebra shape, this substrate mouth is positioned at the rear end of this trunk portion, and this ejiction opening is positioned at the front end in this convex body portion.
3. the rifle head of foaming machine according to claim 2, is characterized in that: this outer nozzle wall becomes arc lowland to stretch out from this nozzle body.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW103216430U TWM493460U (en) | 2014-09-16 | 2014-09-16 | Nozzle head of foaming machine |
TW103216430 | 2014-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN204933802U true CN204933802U (en) | 2016-01-06 |
Family
ID=52783770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201520646140.6U Expired - Fee Related CN204933802U (en) | 2014-09-16 | 2015-08-25 | Gun head of foaming machine |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN204933802U (en) |
DE (1) | DE202015006382U1 (en) |
TW (1) | TWM493460U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109433147A (en) * | 2018-12-07 | 2019-03-08 | 安徽金月节能科技有限公司 | A kind of adjustable type foam gun mixing head |
CN114654647A (en) * | 2022-03-16 | 2022-06-24 | 浙江西联姆斯制冷科技有限公司 | High-pressure foaming preparation process of high-efficiency energy-saving refrigerator |
-
2014
- 2014-09-16 TW TW103216430U patent/TWM493460U/en not_active IP Right Cessation
-
2015
- 2015-08-25 CN CN201520646140.6U patent/CN204933802U/en not_active Expired - Fee Related
- 2015-09-11 DE DE202015006382.9U patent/DE202015006382U1/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109433147A (en) * | 2018-12-07 | 2019-03-08 | 安徽金月节能科技有限公司 | A kind of adjustable type foam gun mixing head |
CN114654647A (en) * | 2022-03-16 | 2022-06-24 | 浙江西联姆斯制冷科技有限公司 | High-pressure foaming preparation process of high-efficiency energy-saving refrigerator |
Also Published As
Publication number | Publication date |
---|---|
TWM493460U (en) | 2015-01-11 |
DE202015006382U1 (en) | 2015-09-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 |
|
CF01 | Termination of patent right due to non-payment of annual fee |