CN207105741U - A kind of means for correcting of Bag Making Machine - Google Patents

A kind of means for correcting of Bag Making Machine Download PDF

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Publication number
CN207105741U
CN207105741U CN201720801927.4U CN201720801927U CN207105741U CN 207105741 U CN207105741 U CN 207105741U CN 201720801927 U CN201720801927 U CN 201720801927U CN 207105741 U CN207105741 U CN 207105741U
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CN
China
Prior art keywords
turntable
guide plate
paper tape
feeding machanism
installation axle
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
Application number
CN201720801927.4U
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Chinese (zh)
Inventor
白勰力
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Bairong Packaging Technology Co., Ltd.
Original Assignee
Shenzhen Bai Rong Paper Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Bai Rong Paper Co Ltd filed Critical Shenzhen Bai Rong Paper Co Ltd
Priority to CN201720801927.4U priority Critical patent/CN207105741U/en
Application granted granted Critical
Publication of CN207105741U publication Critical patent/CN207105741U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of means for correcting of Bag Making Machine, its drip irrigation device is to include frame, upper paper tube feeding machanism and lower paper web feeding machanism, upper paper tube feeding machanism is fixedly installed on frame with lower paper web feeding machanism, frame is provided with Deviation rectifier in upper paper tube feeding machanism and lower paper web feeding machanism position, Deviation rectifier includes console and turntable, turntable is rotationally connected with console, installation axle is provided with turntable, installation axle is rotatably connected to carrying roller, turntable is provided with mounting groove in the junction at itself and the both ends of installation axle, wind spring is provided between installation axle and mounting groove;When the rotation amplitude of turntable is excessive, what paper tape was subject to pulls power increase, paper tape presses to the pressure increase of carrying roller, pressure roller drives installation axle to be moved toward the direction of pressure, wind spring is compressed simultaneously, the effect of mobile generation buffering of the wind spring to installation axle so that what paper tape was subject to, which pull power, is buffered, reduce paper tape because pullling of being subject to power is excessive and situation about being broken.

Description

A kind of means for correcting of Bag Making Machine
Technical field
Paper bag production equipment field is the utility model is related to, more specifically, it relates to a kind of means for correcting of Bag Making Machine.
Background technology
Bag Making Machine be produce Paper handbag ideal equipment, by a machine complete handle make, handle paste, The steps such as sack reflexed, paper web shaping and the shaping of bag bottom, full-automation production, can be effectively saved cost of labor.
, it is necessary to make handle assembly first during making with handled paper bag, when making paper bag handle, generally It is the centre that ropy is first pasted onto to two panels paper tape on handle molding mechanism by PUR or other jellies, upper and lower two Piece paper tape is conveyed in upper paper tube feeding machanism and lower paper web feeding machanism respectively, and paper tape is in upper paper tube feeding machanism with During being transmitted in paper web feeding machanism, it may occur that the situation of lateral run-out original direction of transfer, typically in upper paper tube feeding machine One Deviation rectifier is respectively set on the position of structure and lower paper web feeding machanism, and Deviation rectifier includes console, the company of rotation on console Turntable is connected to, the front and rear end of turntable is respectively and fixedly provided with installation axle, and installation axle is rotatably connected to carrying roller, and paper tape is carried out on carrying roller Transmission, the detection means on Deviation rectifier detect to the direction of transfer of paper tape, are turned according to the deviation rotation of itself and predetermined direction Platform is to correct the direction of transfer of paper tape.
But rotating table with correct paper tape send back direction during, it may occur that the rotation amplitude mistake of turntable Big and pullling of make it that paper tape is subject to power is excessive and situation about being broken.
Utility model content
The purpose of this utility model is to provide a kind of means for correcting of Bag Making Machine, has and corrects paper tape sender in Deviation rectifier Xiang Shi, the power of pullling being subject to paper tape enter row buffering, reduce paper tape because be subject to pull power it is excessive and be broken situation the advantages of.
Above-mentioned technical purpose of the present utility model technical scheme is that:A kind of correction of Bag Making Machine Device, including frame, upper paper tube feeding machanism and lower paper web feeding machanism, the upper paper tube feeding machanism and lower paper web feeding machine Structure is fixedly installed on frame, and the frame is provided with correction in upper paper tube feeding machanism and lower paper web feeding machanism position Device, the Deviation rectifier include console and turntable, and the turntable is rotationally connected with console, and the front and rear end of the turntable is equal Installation axle is provided with, the installation axle is rotatably connected to carrying roller, and the turntable is set in itself and the junction at the both ends of installation axle There is the opposite circular mounting groove of opening, wind spring is provided between the installation axle and mounting groove, the wind spring has installation axle Have toward the trend close to the motion of the direction of the axis of mounting groove.
By using above-mentioned technical proposal, paper tape is passed by upper paper tube feeding machanism and lower paper web feeding machanism respectively Send, when by Deviation rectifier, paper tape is layered on the carrying roller of turntable rear and front end and transmitted paper tape, and carrying roller is rotationally connected with Installation axle, carrying roller reduce the frictional force between paper tape and carrying roller, reduce carrying roller pair with the rotation of the transmit process of paper tape The abrasion of paper tape, and obstruction of the carrying roller to paper tape transmit process is reduced, in paper tape transverse direction sideslip, console control turntable rotates To correct the direction of transfer of paper tape, when the rotation amplitude of turntable is excessive, what paper tape was subject to pulls power increase, and paper tape presses to carrying roller Pressure increase, pressure roller drives installation axle to be moved toward the direction of pressure, while wind spring is compressed, mobile production of the wind spring to installation axle The effect of raw buffering, and then enter row buffering to the pressure that paper tape applies to carrying roller, while paper tape is in the process moved with carrying roller In, what paper tape was subject to, which pull power, is buffered, reduce paper tape because pullling of being subject to power is excessive and situation about being broken.
Preferably, both sides of the turntable between 2 carrying rollers are provided with guide plate.
By using above-mentioned technical proposal, guide plate is oriented in the both sides of the direction of transfer of paper tape to paper tape, is reduced Paper tape deviates the degree of former direction of transfer, reduces the amplitude that Deviation rectifier rotates when correcting the direction of transfer of paper tape needed for turntable, Reduce paper tape and pull power suffered by during correction.
Preferably, the inclined upward of the guide plate towards the guide plate of offside is set.
By using above-mentioned technical proposal, when the larger lateral run-out of amplitude occurs for paper tape, the side of paper tape is along leading To the movement of plate inclined surface, reduce because paper tape along make deviateing perpendicular to the direction of guide plate paper tape on guide plate by The situation for stopping and being broken.
Preferably, the rear and front end of the guide plate is obliquely installed towards outside.
By using above-mentioned technical proposal, the rear and front end of guide plate is obliquely installed towards outside, reduces the end of guide plate Portion directly contacts with paper tape, reduce paper tape during transmission with the ends contact of guide plate and situation about being worn.
Preferably, the turntable is provided with chute along the direction parallel to carrying roller, and the slide is connected with 2 cunnings Block, connecting rod is connected with sliding block, the connecting rod is respectively connected with a guide plate, and the turntable is rotatably connected to silk at chute Bar, the screw mandrel therefrom between toward being provided at both ends with screw thread in opposite direction, the screw mandrel is each at the different screw thread in its direction It is slidably connected cooperation with a sliding block.
By using above-mentioned technical proposal, due to the hand of spiral of part that is slidably connected on screw mandrel with 2 sliding blocks on the contrary, So that in rotary screw rod, sliding block on chute along opposite or opposite square motion, so as to adjust between 2 sliding blocks away from From be connected because 2 guide plates are each with 1 connecting rod with 1 sliding block, passes through the distance between 2 sliding blocks of regulation and can adjust 2 The distance between individual guide plate, to adapt to the needs of the paper tape of different in width.
Preferably, the connecting rod coordinates toward the direction of the side away from or close to turntable with sliding block rotation connection, described Torsion spring is provided between connecting rod and sliding block, the torsion spring makes connecting rod have the trend moved toward the direction away from chute.
By using above-mentioned technical proposal, when lateral run-out occurs for paper tape, the side of paper tape props up guide plate, and guide The direction deviateed to plate application pressure guide plate with paper tape is moved, and guide plate presses connecting rod toward the side of turntable, and turns round Spring enters row buffering to the pressure that connecting rod is subject to, and then enters row buffering to the pressure that paper tape applies to guide plate, so that paper tape The power being subject to from guide plate is buffered, and is reduced paper tape and is mutually extruded with guide plate and make the impaired situation of paper tape.
Preferably, the guide plate is rotationally connected with connecting rod by axle of connecting rod, between the guide plate and connecting rod Spring is provided with, the spring makes guide plate have toward the trend moved perpendicular to the direction of carrying roller.
By using above-mentioned technical proposal, when lateral run-out occurs for paper tape, the side of paper tape props up guide plate, guide plate Rotated with the offset direction of paper tape, while spring makes guide plate have toward the trend moved perpendicular to the direction of carrying roller, Guide plate under the action of the spring guides paper tape toward former direction, accelerates the speed of paper tape correction.
Preferably, one end of the screw mandrel is fixedly connected with knob, and the knob is located at the outside of turntable.
By using above-mentioned technical proposal, knob facilitates operating personnel's rotary screw rod, the convenient guide plate for adjusting both sides it Between distance operation.
In summary, the utility model has the advantages that:In paper tape transverse direction sideslip, console control turntable turns Move to correct the direction of transfer of paper tape, when the rotation amplitude of turntable is excessive, what paper tape was subject to pulls power increase, and paper tape presses to support The pressure increase of roller, pressure roller drives installation axle to be moved toward the direction of pressure, while wind spring is compressed, movement of the wind spring to installation axle The effect of buffering is produced, and then enters row buffering to the pressure that paper tape applies to carrying roller, while paper tape is in the mistake moved with carrying roller Cheng Zhong, what paper tape was subject to, which pull power, is buffered, reduce paper tape because pullling of being subject to power is excessive and situation about being broken, while guide plate Paper tape is oriented in the both sides of the direction of transfer of paper tape, the side of paper tape is moved along the inclined surface of guide plate, is reduced The situation that paper tape is stopped and is broken on guide plate, and the side of paper tape props up guide plate, and paper tape applies to guide plate Pressure, guide plate is set to press connecting rod toward the side of turntable, and torsion spring enters row buffering to the pressure that paper tape applies to guide plate, Reduce paper tape mutually to extrude with guide plate and make the impaired situation of paper tape, while guide plate turns with the offset direction generation of paper tape Dynamic, it is under the action of the spring that paper tape is past toward the trend moved perpendicular to the direction of carrying roller, guide plate that spring has guide plate Former direction guiding, accelerates the speed of paper tape correction, by knob screw mandrel, sliding block is on chute along opposite or opposite side Shape is moved, and so as to adjust the distance between 2 sliding blocks, and then the distance between 2 guide plates is adjusted, to adapt to different in width The needs of paper tape.
Brief description of the drawings
Fig. 1 is the structural representation of the present embodiment;
Fig. 2 is the enlarged drawing of part A in Fig. 1;
Fig. 3 is the relation schematic diagram of wind spring and mounting groove in the present embodiment;
Fig. 4 is the enlarged drawing of part B in Fig. 3.
Reference:1st, frame;2nd, upper paper tube feeding machanism;3rd, lower paper web feeding machanism;4th, Deviation rectifier;41st, console; 42nd, turntable;5th, installation axle;6th, carrying roller;7th, mounting groove;8th, wind spring;9th, guide plate;10th, chute;11st, sliding block;12nd, connecting rod; 13rd, screw mandrel;14th, torsion spring;15th, spring;16th, knob.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but As long as all protected in right of the present utility model by Patent Law.
A kind of means for correcting of Bag Making Machine, as shown in figure 1, being fed including frame 1, upper paper tube feeding machanism 2 and lower paper web Mechanism 3, wherein upper paper tube feeding machanism 2 are fixedly installed on frame 1 with lower paper web feeding machanism 3, and the frame 1 supplies in upper paper tube Material mechanism 2 and the lower position of paper web feeding machanism 3 are provided with Deviation rectifier 4.
As shown in Fig. 2 Deviation rectifier 4 includes console 41 and turntable 42, wherein console 41 is fixedly installed in frame 1, turns Platform 42 is rotationally connected with console 41, and the front and rear end of turntable 42 is provided with carrying roller 6, and paper tape is in upper paper tube feeding machanism 2 When passing through Deviation rectifier 4 during being transmitted with lower paper web feeding machanism 3, the carrying roller 6 that paper tape is layered on the rear and front end of turntable 42 is enterprising Row transmission.
Turntable 42 is provided with chute 10 along the direction parallel to carrying roller 6 in the middle, and 2 cunnings are slidably connected on chute 10 Block 11, turntable 42 are rotatably connected to screw mandrel 13 at chute 10, screw mandrel 13 therefrom between toward being provided at both ends with spiral shell in opposite direction Line, screw mandrel 13 are respectively slidably connected cooperation at the different screw thread in its direction with a sliding block 11, and in rotary screw rod 13, sliding block 11 exists Along opposite or opposite square motion on chute 10, so as to adjust the distance between 2 sliding blocks 11.
As shown in Figure 3 and Figure 4, the top of sliding block 11 is hinged with connecting rod 12, and connecting rod 12 is toward remote or close turn The direction of the side of platform 42 rotates, and torsion spring 14 is provided between connecting rod 12 and sliding block 11, and torsion spring 14 has connecting rod 12 There is the trend moved toward the direction away from chute 10, when lateral run-out occurs for paper tape, the side of paper tape props up guide plate 9, and Apply the direction that pressure guide plate 9 deviates with paper tape to guide plate 9 to move, guide plate 9 is by connecting rod 12 toward the side of turntable 42 Side is pressed, and the pressure that torsion spring 14 is subject to connecting rod 12 enters row buffering, and then paper tape is carried out to the pressure that guide plate 9 applies Buffering, so that the power that paper tape is subject to from guide plate 9 is buffered, reduce paper tape and mutually extruded with guide plate 9 and make paper tape Impaired situation.
The top of connecting rod 12 is rotatably connected to guide plate 9, and guide plate 9 enters in the both sides of the direction of transfer of paper tape to paper tape Row is oriented to, and reduces the degree that paper tape deviates former direction of transfer, reduces the institute of turntable 42 when correcting the direction of transfer of paper tape of Deviation rectifier 4 The amplitude that need to be rotated, reduce paper tape and pull power suffered by during correction.
It is connected because 2 guide plates 9 are each with 1 connecting rod 12 with 1 sliding block 11, by between 2 sliding blocks 11 of regulation The distance between adjustable 2 guide plates 9 of distance, to adapt to the needs of the paper tape of different in width, in order to facilitate operating personnel The operation of the distance between rotary screw rod 13, the convenient guide plate 9 for adjusting both sides, one end of screw mandrel 13 is fixedly connected with knob 16, the knob 16 is located at the outside of turntable 42.
And guide plate 9 is that axle coordinates with the rotation connection of connecting rod 12 with connecting rod 12, between guide plate 9 and connecting rod 12 Spring 15 is provided with, spring 15 makes guide plate 9 have toward the trend moved perpendicular to the direction of carrying roller 6, occurred laterally in paper tape During deviation, the side of paper tape props up guide plate 9, and guide plate 9 rotates with the offset direction of paper tape, while spring 15 makes to lead Have to plate 9 toward the trend moved perpendicular to the direction of carrying roller 6, guide plate 9 is in the presence of spring 15 by paper tape toward former direction Guiding, accelerate the speed of paper tape correction.
The inclined upward of guide plate 9 towards the guide plate 9 of offside is set, and the larger lateral run-out of amplitude occurs in paper tape When, the side of paper tape is moved along 9 inclined surface of guide plate, is reduced because paper tape is along perpendicular to the deviation of the direction of guide plate 9 And the situation for making paper tape be stopped and be broken on guide plate 9.
The rear and front end of guide plate 9 is obliquely installed towards outside, and the end for reducing guide plate 9 directly contacts with paper tape, subtracts Few paper tape during transmission with the ends contact of guide plate 9 and situation about being worn.
Turntable 42 is provided with the opposite circular mounting groove 7 of opening, installation axle in the junction at itself and the both ends of installation axle 5 Wind spring 8 is provided between 5 and mounting groove 7, wind spring 8 makes installation axle 5 have toward close to the motion of the direction of the axis of mounting groove 7 Trend.
Specific work process:In paper tape transverse direction sideslip, console 41 controls turntable 42 to rotate to correct the transmission of paper tape Direction, when the rotation amplitude of turntable 42 is excessive, what paper tape was subject to pulls power increase, and paper tape presses to the pressure increase of carrying roller 6, pressure Roller strap moves installation axle 5 and moved toward the direction of pressure, while wind spring 8 is compressed, mobile generation buffering of the wind spring 8 to installation axle 5 Effect, and then enters row buffering to the pressure that paper tape applies to carrying roller 6, while paper tape is during with the movement of carrying roller 6, paper tape The power of pullling being subject to is buffered, reduce paper tape because pullling of being subject to power is excessive and situation about being broken.
Guide plate 9 is oriented in the both sides of the direction of transfer of paper tape to paper tape simultaneously, and the side of paper tape is along guide plate 9 Inclined surface movement, reduces the situation that paper tape is stopped and is broken on guide plate 9.
And the side of paper tape props up guide plate 9, paper tape applies pressure to guide plate 9, makes guide plate 9 that connecting rod 12 is past The side pressure of turntable 42, and torsion spring 14 enters row buffering to the pressure that paper tape applies to guide plate 9, reduces paper tape and guide plate 9 Mutually extrude and make the impaired situation of paper tape.
Guide plate 9 rotates with the offset direction of paper tape simultaneously, and spring 15 makes guide plate 9 have toward perpendicular to carrying roller The trend of 6 direction motion, guide plate 9 guide paper tape toward former direction in the presence of spring 15, accelerate the speed of paper tape correction Degree.
By the rotary screw rod 13 of knob 16, sliding block 11 on chute 10 along opposite or opposite square motion, so as to adjust The distance between 2 sliding blocks 11 of section, and then the distance between 2 guide plates 9 are adjusted, to adapt to the need of the paper tape of different in width Will.

Claims (8)

1. a kind of means for correcting of Bag Making Machine, including frame (1), upper paper tube feeding machanism (2) and lower paper web feeding machanism (3), The upper paper tube feeding machanism (2) is fixedly installed on frame (1) with lower paper web feeding machanism (3), and the frame (1) is in upper paper tube Feeding machanism (2) and lower paper web feeding machanism (3) position are provided with Deviation rectifier (4), and the Deviation rectifier (4) includes control Platform (41) and turntable (42), the turntable (42) are rotationally connected with console (41), and the front and rear end of the turntable (42) is equal Installation axle (5) is provided with, the installation axle (5) is rotatably connected to carrying roller (6), it is characterized in that:The turntable (42) is in itself and peace The junction at the both ends of dress axle (5) is provided with the opposite circular mounting groove (7) of opening, the installation axle (5) and mounting groove (7) Between be provided with wind spring (8), the wind spring (8) makes installation axle (5) have toward close to the motion of the direction of the axis of mounting groove (7) Trend.
2. a kind of means for correcting of Bag Making Machine according to claim 1, it is characterized in that:The turntable (42) is in 2 carrying rollers (6) both sides between are provided with guide plate (9).
3. a kind of means for correcting of Bag Making Machine according to claim 2, it is characterized in that:The guide plate (9) is towards offside Guide plate (9) inclined upward set.
4. a kind of means for correcting of Bag Making Machine according to claim 2, it is characterized in that:Front and rear the two of the guide plate (9) End is obliquely installed towards outside.
5. a kind of means for correcting of Bag Making Machine according to claim 2, it is characterized in that:The turntable (42) is along parallel to support The direction of roller (6) is provided with chute (10), and the chute (10) slidably connects 2 sliding blocks (11), and sliding block is connected with (11) Connecting rod (12), the connecting rod (12) are respectively connected with a guide plate (9), and the turntable (42) is rotatablely connected at chute (10) place Have a screw mandrel (13), the screw mandrel (13) therefrom between toward screw thread in opposite direction is provided at both ends with, the screw mandrel (13) is in its side Respectively be slidably connected cooperation to different screw threads with a sliding block (11).
6. a kind of means for correcting of Bag Making Machine according to claim 5, it is characterized in that:The connecting rod (12) toward remote or Coordinate close to the direction of the side of turntable (42) and sliding block (11) rotation connection, set between the connecting rod (12) and sliding block (11) Torsion spring (14) is equipped with, the torsion spring (14) makes connecting rod (12) have the trend moved toward the direction away from chute (10).
7. a kind of means for correcting of Bag Making Machine according to claim 5, it is characterized in that:The guide plate (9) is with connecting rod (12) connecting rod (12) is rotationally connected with for axle, spring (15) is provided between the guide plate (9) and connecting rod (12), it is described Spring (15) makes guide plate (9) have toward the trend moved perpendicular to the direction of carrying roller (6).
8. a kind of means for correcting of Bag Making Machine according to claim 5, it is characterized in that:One end of the screw mandrel (13) is fixed Knob (16) is connected with, the knob (16) is located at the outside of turntable (42).
CN201720801927.4U 2017-07-04 2017-07-04 A kind of means for correcting of Bag Making Machine Expired - Fee Related CN207105741U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720801927.4U CN207105741U (en) 2017-07-04 2017-07-04 A kind of means for correcting of Bag Making Machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720801927.4U CN207105741U (en) 2017-07-04 2017-07-04 A kind of means for correcting of Bag Making Machine

Publications (1)

Publication Number Publication Date
CN207105741U true CN207105741U (en) 2018-03-16

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ID=61586664

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720801927.4U Expired - Fee Related CN207105741U (en) 2017-07-04 2017-07-04 A kind of means for correcting of Bag Making Machine

Country Status (1)

Country Link
CN (1) CN207105741U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109532105A (en) * 2018-12-29 2019-03-29 佛山市达肯包装机械有限公司 The drive mechanism of paper bag arrangement collating unit
CN110723580A (en) * 2019-11-06 2020-01-24 安徽百盛源包装材料有限公司 Packaging material production machinery mechanism of rectifying
CN113510945A (en) * 2021-06-24 2021-10-19 西安交通大学 Split sliding type width-adjustable fiber head laying method and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109532105A (en) * 2018-12-29 2019-03-29 佛山市达肯包装机械有限公司 The drive mechanism of paper bag arrangement collating unit
CN109532105B (en) * 2018-12-29 2021-02-19 佛山市达肯包装机械有限公司 Transmission structure of paper bag arranging and finishing device
CN110723580A (en) * 2019-11-06 2020-01-24 安徽百盛源包装材料有限公司 Packaging material production machinery mechanism of rectifying
CN113510945A (en) * 2021-06-24 2021-10-19 西安交通大学 Split sliding type width-adjustable fiber head laying method and device

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GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 518117 No. 17, Pingdi Street, Longgang District, Shenzhen City, Guangdong Province, Fenglong Industrial Zone, Pingxi Road

Patentee after: Shenzhen Bairong Packaging Technology Co., Ltd.

Address before: 518117 No. 17, Pingdi Street, Longgang District, Shenzhen City, Guangdong Province, Fenglong Industrial Zone, Pingxi Road

Patentee before: Shenzhen Bai Rong Paper Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180316

Termination date: 20190704