CN203714888U - Micro-tension driving uncoiling device capable of moving horizontally and measuring coiling diameter - Google Patents
Micro-tension driving uncoiling device capable of moving horizontally and measuring coiling diameter Download PDFInfo
- Publication number
- CN203714888U CN203714888U CN201320819174.1U CN201320819174U CN203714888U CN 203714888 U CN203714888 U CN 203714888U CN 201320819174 U CN201320819174 U CN 201320819174U CN 203714888 U CN203714888 U CN 203714888U
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- frame
- wheel support
- guiding roller
- coil
- minimal tension
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Abstract
The utility model discloses a micro-tension driving uncoiling device capable of moving horizontally and measuring the coiling diameter. The micro-tension driving uncoiling device comprises a rack, wherein the rack is provided with an installing seat for placing a strip coil, and the bottom part of the rack is provided with a driving mechanism; the driving mechanism comprises a belt wheel bracket rotatably arranged on the rack in a hinging manner; the two ends of the belt wheel bracket are respectively provided with a belt wheel; the belt wheel bracket is provided with a motor for driving a transmission belt to move; the rack is provided with a power device which is used for driving the belt wheel bracket to rotate and enabling the transmission belt to be contacted and matched with the strip coil. The rack is also provided with a micro-tension conveying mechanism; the micro-tension conveying mechanism comprises a roll frame; the rack is provided with the installing seat; the roll frame is arranged on the installing seat and is provided with a guide roll I; the rack is provided with at least two guide rolls II with the axes being parallel to the axis of the guide roll I and in different planes; a rotating shaft is also provided with a weighting device. The bottom part of the rack is provided with a track device parallel to the rotating axis of the strip coil and a coiling-diameter measuring device for measuring the coiling diameter.
Description
Technical field
The utility model relates to a kind of unwinding device, and concrete can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting for a kind of.
Background technology
Existing unwinding device generally comprises the roll coil of strip that batches band and the driven roller that relays volume for rotating band convolution, driven roller is two up and down that cooperatively interact, and utilize the frictional force drives roll coil of strip rotation between driven roller and band to unreel, in unreeling process, band can be subject to a pulling force effect.In addition, the brake of this unreeling structure is arranged on the winding roller of the roll coil of strip, when brake, between driven roller and band, can have certain impact, between driven roller and band, has a larger force of sliding friction.Although this unreeling structure can meet the requirement that unreels of most of band, when band is thin paper band, because thin paper band is easily broken, adopts existing unreeling structure to meet and unreel requirement.
Unwinding device generally need to arrange live roll and carry the band that unreels out, in existing unwinding device, because the tensile strength of band is generally larger, therefore can directly adopt the friction force between live roll and band to drive ribbon motion, also can power be set on the wind-up roll of the equipment other end and pull band to move.Although existing unwinding device can meet the conveying requirement of band to a certain extent, but, when the tensile strength of band band is very little, while being thin paper band such as band, larger pulling force can cause paper tape fracture, cannot meet the requirement of production, thereby need to the pulling force in paper tape course of conveying be limited.
In addition, in unreeling process, also need coil diameter to carry out measuring in real time monitoring, existing measurement of film reel diameter element generally adopts ultrasonic transduter, still, after long-time use, on sensor, can pile up dust, cause measuring inaccurate, even can cause sensor failure, and ultrasonic transduter operated by rotary motion is in the inside of unwinding device, be difficult to clean.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting, this Minimal Tension active unwinding device not only can transverse shifting and is measured coil diameter, and can meet the requirement that unreels as easily broken bands such as thin paper bands, and can regulate in real time the pulling force size to band, and then can meet the conveying requirement of the band that tensile strength is very little.
For achieving the above object, the utility model provides following technical scheme:
Can also can measure a Minimal Tension active unwinding device for coil diameter by transverse shifting, comprise frame, described frame is provided with for placing the mounting groove of the roll coil of strip, and the bottom of described frame is provided with the driver train that relays volume for rotating band convolution;
Described driver train comprises that rotation is hingedly mounted on the band wheel support in described frame, the described two ends with wheel support are respectively equipped with belt pulley, between two described belt pulleys, be provided with drive belt, and describedly with wheel support, be provided with for driving the motor of described drive belt motion, frame is provided with for driving describedly rotate and makes described drive belt contact the engine installation of cooperation with the described roll coil of strip with wheel support;
In described frame, be also provided with the Minimal Tension conveying mechanism for delivery of the band after unreeling, described Minimal Tension conveying mechanism comprises roller frame, described frame is provided with for the mount pad of described roller frame is installed, described roller frame rotates to coordinate by rotating shaft and is arranged on described mount pad, on described roller frame, coordinate and be provided with guiding roller I with its rotation, the axis of described guiding roller I is parallel with the axis of described rotating shaft, described frame is provided with at least two axis and not guiding roller II on same plane parallel with described guiding roller I axis, in described rotating shaft, be also provided with for overcoming the counter weight device of the friction torque between described rotating shaft and mount pad,
The below of described frame is provided with rail set, and described rail set comprises and be laid on two guide rails of described frame below and be arranged in described frame and the chute coordinating with described guide rail, and described guide rail is parallel with the rotation axis of the described roll coil of strip;
In described frame, be also provided with for measuring the described measurement of film reel diameter device with coil coil-diameter, described measurement of film reel diameter device comprises ultrasonic transduter for measuring coil diameter, cover on protective case outside described ultrasonic transduter and for described protective case being purged to the high pressure air rifle of dedusting.
Further, described guiding roller II is two and is positioned at left side or the right side of described guiding roller I, and described guiding roller I is between two described guiding roller II; Described counter weight device is positioned at the opposite side that described guiding roller I is relative with described guiding roller II.
Further, described counter weight device comprises the pole being fixedly connected with described rotating shaft and is hingedly mounted on the clump weight on described pole.
Further, described engine installation is cylinder, and the cylinder body of described cylinder is hingedly mounted in described frame, and the piston rod of cylinder and described band wheel support are articulated and connected.
Further, described one end with wheel support is provided with hinged otic placode, and the piston rod of described cylinder and described hinged otic placode are articulated and connected.
Further, be positioned at and describedly with wheel support, near the described belt pulley rotation of described hinged otic placode one end, coordinate and be arranged in described frame, and this belt pulley is driving pulley, being arranged on the described belt pulley with the wheel support other end is driven pulley.
Further, describedly with wheel support, be provided with for the kidney-shaped circular hole of described driven pulley is installed, and describedly with wheel support, be provided with for regulating the regulating mechanism of described driven pulley installation site.
Further, described regulating mechanism comprises that rotation engage sleeves is contained in the termination on described driven pulley and is fixedly installed on described with the adapter plate on wheel support, in described termination, be provided with tapped bore, in described tapped bore, be provided with and with its screw thread fit and with the rotation of described adapter plate, coordinate and the screw rod of axial restraint.
Further, described screw rod is provided with set collar, described adapter plate is provided with the through hole coordinating with described set collar, described screw rod is through described through hole and utilize described set collar and described adapter plate axial location, and described set collar is positioned at described adapter plate away from a side of described driving pulley.
Further, described screw rod is provided with for the positioning head with described adapter plate axial location, and described positioning head and described set collar lay respectively at the both sides of described adapter plate.
The beneficial effects of the utility model are:
The utility model can also can be measured the Minimal Tension active unwinding device of coil diameter by transverse shifting, after the roll coil of strip is placed on mounting groove, utilize the rotation of engine installation driving pulley support, make drive belt contact cooperation with the roll coil of strip, utilize the friction force between drive belt and the roll coil of strip, rotating band convolution relays volume, so, unreel in process, the propulsive effort unreeling acts directly on the roll coil of strip, can to band, not produce the effect of pulling force, can meet the requirement that unreels of easily broken band (as thin paper band);
By Minimal Tension conveying mechanism is set, and roller frame rotation cooperation is arranged in frame and in the rotating shaft of roller frame counter weight device is set, counter weight device countershaft applies a gravity bending moment; Axis by two axis and guiding roller I be set is the guiding roller II on a straight line not, band is walked around one of them guiding roller II, guiding roller I and another guiding roller II successively, in the time of band under tension, guiding roller I can be subject to the effect of power, and then produces pulling force moment of flexure with respect to rotating shaft; In addition, between rotating shaft and mount pad, also there is a friction force moment of torsion; In the time of in the number range that pulling force is being set, pulling force moment of flexure and gravity bending moment sum are less than friction force moment of torsion, and roller frame can not rotate; When pulling force exceeds while setting number range, pulling force moment of flexure and gravity bending moment sum are greater than friction force moment of torsion, and roller frame rotates, and then the size of the pulling force that is subject to of reduction band, and reach new balance position, prevent that band from being broken by larger pulling force; So, adopt the weight of suitable counter weight device, can meet the conveying of the band less to tensile strength (as thin paper band), and can not be pulled off;
By rail set is set, and guide rail is set to parallelly with the rotation axis of the roll coil of strip, can conveniently regulate the position of frame, and then regulate easily the position that unreels of band, is convenient to align with equipment such as band feedways; By measurement of film reel diameter device is set, and on ultrasonic transduter outer cover protective case, utilize high pressure air rifle the dust that accumulates on protective case can be purged clean, guarantee the survey precision of ultrasonic transduter.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearer, the utility model provides following accompanying drawing to describe:
Fig. 1 is that the utility model can also can be measured the structural representation of the Minimal Tension active unwinding device embodiment of coil diameter by transverse shifting;
Fig. 2 is the A detail drawing of Fig. 1;
Fig. 3 is the structural representation of measurement of film reel diameter device.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
As shown in Figure 1, for the utility model can also can be measured the structural representation of the Minimal Tension active unwinding device embodiment of coil diameter by transverse shifting.The present embodiment can also can be measured the Minimal Tension active unwinding device of coil diameter by transverse shifting, comprises frame 1, and frame 1 is provided with for placing the mounting groove 3 of the roll coil of strip 2, and the bottom of frame 1 is provided with the driver train for driving the roll coil of strip 2 rotations to unreel.The driver train of the present embodiment comprises that rotation is hingedly mounted on the band wheel support 4 in frame 1, two ends with wheel support 4 are respectively equipped with belt pulley, between two belt pulleys, be provided with drive belt 6, and with wheel support 4, be provided with for driving the motor of drive belt 6 motions, frame 1 is provided with for driving pulley support 4 rotates and makes drive belt 6 contact the engine installation coordinating with the roll coil of strip 2.The engine installation of the present embodiment is cylinder 7, and the cylinder body of cylinder 7 is hingedly mounted in frame 1, and the piston rod of cylinder 7 is articulated and connected with band wheel support 4.Concrete, one end with wheel support 4 is provided with hinged otic placode 4a, the piston rod of cylinder 7 and hinged otic placode 4a are articulated and connected, utilize the fore and aft motion of cylinder 7, can rotate by driving pulley support 4, and then make drive belt 6 contact cooperation with the roll coil of strip 2, and drive belt 6 and the roll coil of strip 2 are applied to certain pressure, with increasing friction force, drive the roll coil of strip 2 rotations to unreel.Concrete, the present embodiment is positioned at the belt pulley rotation cooperation near hinged otic placode 4a one end with wheel support 4 and is arranged in frame 1, and this belt pulley is driving pulley 5a, the belt pulley being arranged on wheel support 4 other ends is driven pulley 5b, the frame 1 of the present embodiment is provided with for the band wheel seat 8 of driving pulley 5a is installed, driving pulley rotation coordinates and is arranged on band wheel seat 8, and band wheel support 4 take this driving pulley 5a and rotatablely move as rotating shaft, and motor is connected with this driving pulley 5a.Adopt the driving mechanism structure of this structure simple, and can increase the rotation amplitude with wheel support 4.
In frame 1, be also provided with the Minimal Tension conveying mechanism for delivery of the band after unreeling, Minimal Tension conveying mechanism comprises roller frame 9, frame 1 is provided with for the mount pad 10 of roller frame 9 is installed, roller frame 9 is coordinated and is arranged on mount pad 10 by rotating shaft 11 rotations, on roller frame 9, coordinate and be provided with guiding roller I 12 with its rotation, the axis of guiding roller I 12 is parallel with the axis of rotating shaft 11, frame 1 is provided with at least two axis and not guiding roller II 13 on same plane parallel with guiding roller I 12 axis, in rotating shaft 11, be also provided with for overcoming the counter weight device of the friction torque between rotating shaft 11 and mount pad 10.The guiding roller II 13 of the present embodiment is two and is positioned at left side or the right side of guiding roller I 12, and guiding roller I 12 is between two guiding roller II 13.Band is walked around one of them guiding roller II 13, guiding roller I 12 and another guiding roller II 13 successively, when band under tension, and the effect that also can produce power to guiding roller I 12.The counter weight device of the present embodiment comprises the pole 14 being fixedly connected with rotating shaft 11 and is hingedly mounted on the clump weight 15 on pole 14, by adopting the clump weight 15 of Different Weight, the pulling force tolerance range of adjustable strip, and by clump weight 9 is hingedly mounted on pole 8, can make pole be subject to all the time Action of Gravity Field straight down, and then after roller frame 2 rotates through, reduce it with respect to the size of the gravity bending moment of rotating shaft 4, be convenient to fast static at new balance position.
The below of frame 1 is provided with rail set, and rail set comprises and be laid on two guide rails 20 of frame 1 below and be arranged in frame 1 and the chute 21 coordinating with guide rail 20, and guide rail 20 is parallel with the rotation axis of the roll coil of strip 2.By rail set is set, and guide rail 20 is set to parallel with the rotation axis of the roll coil of strip 2, can conveniently regulates the position of frame, and then regulate easily the position that unreels of band 2, be convenient to align with equipment such as band feedways.In frame 1, be also provided with for measuring the measurement of film reel diameter device of the described roll coil of strip 2 coil diameters, measurement of film reel diameter device comprises ultrasonic transduter 22 for measuring coil diameter, cover on protective case 23 outside ultrasonic transduter 22 and for protective case 23 being purged to the high pressure air rifle 24 of dedustings.By measurement of film reel diameter device is set, and on ultrasonic transduter 22 outer covers protective case 23, utilize high pressure air rifle 24 dust of accumulation on protective case 23 can be purged clean, guarantee the survey precision of ultrasonic transduter 22.
The present embodiment can also can be measured the Minimal Tension active unwinding device of coil diameter by transverse shifting, after the roll coil of strip 2 is placed on mount pad 3, utilize cylinder 7 driving pulley support 4 rotations, make drive belt 6 contact cooperation with the roll coil of strip 2, utilize the friction force between drive belt 6 and the roll coil of strip 2, drive the roll coil of strip 2 rotations to unreel, so, unreel in process, the propulsive effort unreeling acts directly on the roll coil of strip 2, can to band, not produce the effect of pulling force, can meet the requirement that unreels of easily broken band (as thin paper band).
By Minimal Tension conveying mechanism is set, and the 9 rotation cooperations of roller frame are arranged in frame 1 and in the rotating shaft 11 of roller frame 9 counter weight device is set, counter weight device countershaft 11 applies a gravity bending moment; Axis by two axis and guiding roller I 12 be set is the guiding roller II 13 on a straight line not, band is walked around one of them guiding roller II 13, guiding roller I 12 and another guiding roller II 13 successively, in the time of band under tension, guiding roller I 12 can be subject to the effect of power, and then produces pulling force moment of flexure with respect to rotating shaft 11; In addition, between rotating shaft 11 and mount pad 10, also there is a friction force moment of torsion; In the time of in the number range that pulling force is being set, pulling force moment of flexure and gravity bending moment sum are less than friction force moment of torsion, and roller frame 9 can not rotate; When pulling force exceeds while setting number range, pulling force moment of flexure and gravity bending moment sum are greater than friction force moment of torsion, and roller frame 9 rotates, and then the size of the pulling force that is subject to of reduction band, and reach new balance position, prevent that band from being broken by larger pulling force; So, adopt the weight of suitable counter weight device, can meet the conveying of the band less to tensile strength (as thin paper band), and can not be pulled off.
Further, with wheel support 4, be provided with for the kidney-shaped circular hole of driven pulley 5b is installed, and be provided with for regulating the regulating mechanism of driven pulley 5b installation site with wheel support 4.The regulating mechanism of the present embodiment comprises that rotation engage sleeves is contained in the termination 16 on driven pulley 5b and is fixedly installed on the adapter plate 17 on wheel support 4, in termination 16, be provided with tapped bore, in tapped bore, be provided with and with its screw thread fit and with adapter plate 17 rotation, coordinate and the screw rod 18 of axial restraint.Concrete, the screw rod 18 of the present embodiment is provided with set collar 18a, adapter plate 17 is provided with the through hole coordinating with set collar 18a, and screw rod 18 is through through hole and utilize set collar 18a and adapter plate 17 axial location, and set collar 18a is positioned at adapter plate 17 away from a side of driving pulley 5a.Preferably, screw rod 18 is provided with for the positioning head 19 with adapter plate axial location, positioning head 19 and set collar 18a lay respectively at the both sides of adapter plate 17, be convenient on the one hand drive screw 18 rotations, and then the installation site of adjusting driven pulley 5b, make on the other hand better axial location of screw rod 18.By regulating mechanism is set, can regulate quickly and easily the installation site of driven pulley 5b, and then regulate the distance between driving pulley 5a and driven pulley 5b, and by drive belt 6 tensions.
Finally explanation is, above preferred embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can to it, make various changes in the form and details, and not depart from the utility model claims limited range.
Claims (10)
1. can also can measure a Minimal Tension active unwinding device for coil diameter by transverse shifting, it is characterized in that: comprise frame, described frame is provided with for placing the mounting groove of the roll coil of strip, and the bottom of described frame is provided with the driver train that relays volume for rotating band convolution;
Described driver train comprises that rotation is hingedly mounted on the band wheel support in described frame, the described two ends with wheel support are respectively equipped with belt pulley, between two described belt pulleys, be provided with drive belt, and describedly with wheel support, be provided with for driving the motor of described drive belt motion, frame is provided with for driving describedly rotate and makes described drive belt contact the engine installation of cooperation with the described roll coil of strip with wheel support;
In described frame, be also provided with the Minimal Tension conveying mechanism for delivery of the band after unreeling, described Minimal Tension conveying mechanism comprises roller frame, described frame is provided with for the mount pad of described roller frame is installed, described roller frame rotates to coordinate by rotating shaft and is arranged on described mount pad, on described roller frame, coordinate and be provided with guiding roller I with its rotation, the axis of described guiding roller I is parallel with the axis of described rotating shaft, described frame is provided with at least two axis and not guiding roller II on same plane parallel with described guiding roller I axis, in described rotating shaft, be also provided with for overcoming the counter weight device of the friction torque between described rotating shaft and mount pad,
The below of described frame is provided with rail set, and described rail set comprises and be laid on two guide rails of described frame below and be arranged in described frame and the chute coordinating with described guide rail, and described guide rail is parallel with the rotation axis of the described roll coil of strip;
In described frame, be also provided with for measuring the described measurement of film reel diameter device with coil coil-diameter, described measurement of film reel diameter device comprises ultrasonic transduter for measuring coil diameter, cover on protective case outside described ultrasonic transduter and for described protective case being purged to the high pressure air rifle of dedusting.
2. according to claim 1 can transverse shifting and can measure the Minimal Tension active unwinding device of coil diameter, it is characterized in that: described guiding roller II is two and is positioned at left side or the right side of described guiding roller I, described guiding roller I is between two described guiding roller II; Described counter weight device is positioned at the opposite side that described guiding roller I is relative with described guiding roller II.
3. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 2, it is characterized in that: described counter weight device comprises the pole being fixedly connected with described rotating shaft and is hingedly mounted on the clump weight on described pole.
4. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 1, it is characterized in that: described engine installation is cylinder, and the cylinder body of described cylinder is hingedly mounted in described frame, the piston rod of cylinder and described band wheel support are articulated and connected.
5. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 4, it is characterized in that: described one end with wheel support is provided with hinged otic placode, the piston rod of described cylinder and described hinged otic placode are articulated and connected.
6. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 5, it is characterized in that: be positioned at and describedly with wheel support, near the described belt pulley rotation of described hinged otic placode one end, coordinate and be arranged in described frame, and this belt pulley is driving pulley, being arranged on the described belt pulley with the wheel support other end is driven pulley.
7. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 6, it is characterized in that: describedly with wheel support, be provided with for the kidney-shaped circular hole of described driven pulley is installed, and describedly with wheel support, be provided with for regulating the regulating mechanism of described driven pulley installation site.
8. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 7, it is characterized in that: described regulating mechanism comprises that rotation engage sleeves is contained in the termination on described driven pulley and is fixedly installed on described with the adapter plate on wheel support, in described termination, be provided with tapped bore, in described tapped bore, be provided with and with its screw thread fit and with the rotation of described adapter plate, coordinate and the screw rod of axial restraint.
9. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 8, it is characterized in that: described screw rod is provided with set collar, described adapter plate is provided with the through hole coordinating with described set collar, described screw rod is through described through hole and utilize described set collar and described adapter plate axial location, and described set collar is positioned at described adapter plate away from a side of described driving pulley.
10. can also can measure the Minimal Tension active unwinding device of coil diameter by transverse shifting according to claim 9, it is characterized in that: described screw rod is provided with for the positioning head with described adapter plate axial location, described positioning head and described set collar lay respectively at the both sides of described adapter plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320819174.1U CN203714888U (en) | 2013-12-13 | 2013-12-13 | Micro-tension driving uncoiling device capable of moving horizontally and measuring coiling diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320819174.1U CN203714888U (en) | 2013-12-13 | 2013-12-13 | Micro-tension driving uncoiling device capable of moving horizontally and measuring coiling diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203714888U true CN203714888U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320819174.1U Expired - Fee Related CN203714888U (en) | 2013-12-13 | 2013-12-13 | Micro-tension driving uncoiling device capable of moving horizontally and measuring coiling diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203714888U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106516843A (en) * | 2016-11-28 | 2017-03-22 | 无锡同心塑料制品有限公司 | Quick insulating sleeve winding device |
| CN110668228A (en) * | 2019-10-03 | 2020-01-10 | 曹阳 | A soft paper feeds automatically regulated structure for water-based ink printing |
-
2013
- 2013-12-13 CN CN201320819174.1U patent/CN203714888U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106516843A (en) * | 2016-11-28 | 2017-03-22 | 无锡同心塑料制品有限公司 | Quick insulating sleeve winding device |
| CN106516843B (en) * | 2016-11-28 | 2017-12-12 | 无锡同心塑料制品有限公司 | A kind of quick wrap-up of insulating sleeve |
| CN110668228A (en) * | 2019-10-03 | 2020-01-10 | 曹阳 | A soft paper feeds automatically regulated structure for water-based ink printing |
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| 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: 20140716 Termination date: 20141213 |
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| EXPY | Termination of patent right or utility model |