CN101407255B - Feeding apparatus of coiling packing bag - Google Patents
Feeding apparatus of coiling packing bag Download PDFInfo
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- CN101407255B CN101407255B CN2008100401355A CN200810040135A CN101407255B CN 101407255 B CN101407255 B CN 101407255B CN 2008100401355 A CN2008100401355 A CN 2008100401355A CN 200810040135 A CN200810040135 A CN 200810040135A CN 101407255 B CN101407255 B CN 101407255B
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- wheel
- track adjusting
- adjusting wheel
- driving pulley
- packing bag
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- 238000012856 packing Methods 0.000 title claims description 17
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000003044 adaptive effect Effects 0.000 claims description 10
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
一种食品包装机械领域的卷状包装袋放料装置，包括：放卷导向装置、检测垂轮装置、预拉压平装置、间歇式进料轮和进料电机，其中：放卷导向装置中设有卷料，由放卷导向装置将卷料输送至预拉压平装置，预拉压平装置、检测垂轮装置和进料电机以电路连接，检测垂轮装置活动设置于预拉压平装置正下方，间歇式进料轮设置于检测垂轮装置后部并与进料电机同轴连接，卷料分别经过放卷导向装置、预拉压平装置和检测垂轮装置后进入间歇式进料轮。本发明能够有效地使进入间歇式进料轮的卷料张力均匀平整，从而提高整机的切割稳定性及投包速度。
A roll-shaped packaging bag unwinding device in the field of food packaging machinery, including: unwinding guide device, detection vertical wheel device, pre-tensioning and flattening device, intermittent feeding wheel and feeding motor, wherein: the unwinding guide device Coil material is provided, and the coil material is transported to the pre-stretching and flattening device by the unwinding guide device. The pre-tensioning and flattening device, the detection vertical wheel device and the feeding motor are connected by a circuit, and the detection vertical wheel device is set at the pre-tension and flattening device. Right below the device, the intermittent feeding wheel is set at the rear of the detection vertical pulley device and is coaxially connected with the feeding motor. material wheel. The invention can effectively make the tension of the coil material entering the intermittent feeding wheel even and level, thereby improving the cutting stability and the bag delivery speed of the whole machine.
Description
Technical field
What the present invention relates to is a kind of device of food packing machine technical field, specifically is a kind of feeding apparatus of coiling packing bag.
Background technology
At present traditional feeding apparatus of coiling packing bag great majority are that coiled strip passes through track adjusting wheel, directly by batch feeding wheel instantaneous turn round at high speed it is sent into cut part and by cut-off knife its cut-out fed intake again.This method is when speed of cut is very fast, and the instantaneous high-speed operation of batch feeding wheel can make the suffered tension force of coiled strip inhomogeneous, has a strong impact on Cutting Length and end product quality.Therefore traditional blowing mode have to underspeed instantaneous high-speed operation of alleviating batch feeding wheel is inhomogeneous to the tension force that coiled strip causes.Simultaneously coiling packing bag is that coiled strip is about the 50mm plug by radius and is entwined from the inside to surface, therefore different its radiuss of curvature in coiled strip present position are also different, the closer to the more little unfairness more of its radius of curvature of coiled strip of plug, big more smooth relatively more away from its radius of curvature of coiled strip of plug more.Cut the extremely inconsistent coiled strip of planeness again with the direct blowing of orthodox method, its Cutting Length is also influenced.
Find through retrieval prior art, China utility model patent ZL200620007620.9, the utility model patent of Granted publication CN2934089, put down in writing a kind of " two automatically parcel delivery machine of cutting ", comprise: feed box, track adjusting wheel, touch-screen, testing agency, the drawstring part, cutting knife is partly, cutting knife driving section and frame are partly, described cutting knife partly adopts cutting knife and the two cutting knife patterns of cutting knife, and by magnetic clutch and magnetic clutch control, rocking arm and cam follower transmission are adopted in the cutting knife driving section respectively.Though this device can alleviate the part human cost, because the direct feed of supply disk, inconsistent to coiled strip tension force during dishful and when owing to coil influence Cutting Length, and it is frequent to make it to report to the police, thereby also adjusts frequently.
Summary of the invention
The present invention is directed to the deficiency that above-mentioned prior art exists, a kind of feeding apparatus of coiling packing bag is provided, can prevent that the tension force that causes because of batch feeding wheel direct pull coiled strip is inhomogeneous by actv., solve simultaneously because the cutting instability that the coiled strip unfairness causes enables the stable cooperation packaging bag of effective high speed and cuts feeding system.
The present invention is achieved by the following technical solutions, the present invention includes: unreel guide piece, detect the wheel apparatus that hangs down, the prestretching pressuring flat device, batch feeding wheel and charging motor, wherein: unreel the coiled strip that is provided with pending coiling packing bag in the guide piece, by unreeling guide piece coiled strip is delivered to the prestretching pressuring flat device, the prestretching pressuring flat device, detecting the wheel apparatus that hangs down is connected with circuit with the charging motor, detecting the wheel apparatus that hangs down is movably set under the prestretching pressuring flat device, coiled strip is respectively through unreeling guide piece, enter batch feeding wheel behind the vertical wheel apparatus of prestretching pressuring flat device and detection, batch feeding wheel is arranged at the vertical wheel apparatus rear portion of detection and is connected with the charging motor coaxle.
The described guide piece that unreels comprises: unreeling shaft support, unreeling shaft, the first track adjusting wheel support, first track adjusting wheel, second track adjusting wheel, the 3rd track adjusting wheel support and the 3rd track adjusting wheel.Wherein: unreeling shaft is fixedly set on the unreeling shaft support, first track adjusting wheel is propped up and is set up in directly over the unreeling shaft, first track adjusting wheel and second track adjusting wheel are located at the two ends of the first track adjusting wheel support respectively, the 3rd track adjusting wheel support and first track adjusting wheel are propped up and are set up in same horizontal surface, be respectively in the both sides of prestretching pressuring flat device, the 3rd track adjusting wheel is arranged on the 3rd track adjusting wheel support.
The axle axial two ends of described first track adjusting wheel, second track adjusting wheel and the 3rd track adjusting wheel are equipped with the track adjusting wheel back-up ring, can prevent that coiled strip from deviating from track adjusting wheel when being drawn.
The vertical wheel apparatus of described detection comprises: detect the wheel that hangs down, detect vertical wheel guide rail, upper limit sensor, lower limited sensor and sensing chip, wherein: detect the wheel guide rail that hangs down and vertically place, detection is hung down, and taking turns slides is arranged on the vertical wheel of the detection guide rail, on the upper and lower edge of detecting the wheel guide rail that hangs down upper limit sensor and lower limited sensor are set respectively, sensing chip is located at and is detected on the wheel that hangs down.
The mass range of the vertical wheel of described detection is 150 grams～450 grams.
Described prestretching pressuring flat device comprises: pressure adaptive support, pressure control nut, pressure spring, driving pulley group, imput shaft, driven pulley group and drive motor, wherein: pressure spring is installed on the pressure adaptive support by bolt, pressure control nut and the coaxial setting of pressure spring, drive motor links to each other with imput shaft, be arranged on the pressure adaptive support to driving pulley group and driven pulley group parallel vertical, coiled strip is arranged between driving pulley group and the driven pulley group.
Described driving pulley group comprises: first driving pulley, second driving pulley, active belt, wherein: the up and down discrete setting and being nested in initiatively in the belt of first driving pulley and second driving pulley, first driving pulley and the coaxial setting of imput shaft drive second driving pulley by the active belt.
Described drive motor is a reducing motor, and the reduction ratio of this motor is controlled at the external diameter linear velocity v that makes with its coaxial first driving pulley that links to each other
1The external diameter linear velocity v of batch feeding wheel of rotation links to each other with follow-up material motor coaxle
2Relation constantly satisfy: v
1＞MAX (v
2) * 120%, wherein MAX (v
2) be the external diameter linear velocity of batch feeding wheel when rotating with maximum speed.
Described driven pulley group comprises: first driven pulley, second driven pulley, driven belt, wherein: the up and down discrete setting and being nested in the driven belt of first driven pulley and second driven pulley.
Described driving pulley group width is belt-wheel hub structure of 55mm～63mm.
Described driven pulley group is that width is belt-wheel hub structure of 55mm～63mm.
The invention has the advantages that to make coiled strip before entering batch feeding wheel, have comparatively evenly suitable tension force effectively, simultaneously planeness and inconsistent coiled strip are flattened before entering batch feeding wheel.The great like this speed that cuts coiled strip that improved, and the conformability of the coiled strip end product quality after guaranteeing to cut.
Description of drawings
Fig. 1 is a front elevation of the present invention;
Fig. 2 is a prestretching pressuring flat device birds-eye view of the present invention;
Fig. 3 is a prestretching pressuring flat device front elevation of the present invention;
Fig. 4 is a block diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As depicted in figs. 1 and 2, present embodiment comprises: by detecting the wheel 1 that hangs down, detect the wheel guide rail 2 that hangs down, sensing chip 3, the vertical wheel apparatus of detection that lower limited sensor 4 and upper limit sensor 5 are formed, by unreeling shaft support 6, unreeling shaft 7, first track adjusting wheel 12, the first track adjusting wheel support 13, second track adjusting wheel 14, the 3rd track adjusting wheel support 15 and the 3rd track adjusting wheel 16 are formed unreels guide piece, by pressure adaptive support 8, pressure spring 9, pressure control nut 10, driving pulley group 25, driven pulley group 26, prestretching pressuring flat device and coiled strip 27 that imput shaft 23 and drive motor 24 are formed, supporting backboard 28, batch feeding wheel 29 and charging motor 30;
Wherein: unreeling shaft support 6 is fixedly set in supporting backboard 28, unreeling shaft 7 is arranged on the unreeling shaft support 6, the first track adjusting wheel support 13 is located at directly over the unreeling shaft 7, first track adjusting wheel 12 and second track adjusting wheel 14 are located at the first track adjusting wheel support, 13 two ends respectively, the 3rd track adjusting wheel support 15 and the first track adjusting wheel support 13 are located at same horizontal surface with the priority position, the 3rd track adjusting wheel 16 is arranged on the 3rd track adjusting wheel support 15, pressure spring 9 is installed on the pressure adaptive support 8 by bolt, pressure control nut 10 and pressure spring 9 coaxial settings, drive motor 24 is linked to each other on supporting backboard 28 and with imput shaft 23 by bolt, driving pulley group 25 and driven pulley group 26 all are arranged on the pressure adaptive support 8 vertically, make coiled strip 27 between driving pulley group 25 and driven pulley group 26, detecting the wheel guide rail 2 that hangs down vertically places and is fixed on the supporting backboard 28, the wheel 1 that detect to hang down slides to be arranged at and detects on the wheel guide rail 2 that hangs down and can free up-and-down movement, establishing upper limit sensor 5 with the upper end of the level attitude that detects the wheel guide rail 2 that hangs down, limit sensor 4 is set in the lower end, sensing chip 3 is located at and is detected on the wheel 1 that hangs down, and with wheel 1 up-and-down movement simultaneously that detect to hang down, charging motor 30 is fixed on the supporting back board 28 and is positioned at the heteropleural of supporting back board 28 with batch feeding wheel 9, and batch feeding wheel 9 is passed 28 coaxial linking to each other of supporting back board with charging motor 30.
The quality of the vertical wheel 1 of described detection is 300 grams, and the quality that detects vertical wheel 1 when cooperating the packaging bag of differential tension quality can increase or reduce 50% as adjusting.
As shown in Figure 3, described driving pulley group 25 comprises: second driving pulley 20, active belt 21 and first driving pulley 22, wherein: the discrete setting and being nested in initiatively in the belt 21 about in the of 20 of first driving pulley 22 and second driving pulley, first driving pulley 22 and imput shaft 23 coaxial settings, drive second driving pulley 20 by active belt 21, first driving pulley 22 and imput shaft 23 coaxial settings drive second driving pulley 20 by active belt 21.
Described driven pulley group 26 comprises: first driven pulley 17, driven belt 18 and second driven pulley 19, wherein: the discrete setting and being nested in the driven belt 18 about in the of 19 of first driven pulley 17 and second driven pulley.
Described drive motor 24 is a reducing motor, and the reduction ratio of this motor is controlled at the external diameter linear velocity v that makes with its coaxial first driving pulley 22 that links to each other
1External diameter linear velocity v with the batch feeding wheel 29 of the follow-up material motor 30 coaxial rotations that link to each other
2Relation constantly satisfy: v
1＞MAX (v
2) * 120%, wherein MAX (v
2) be the external diameter linear velocity of batch feeding wheel when rotating with maximum speed.
Described driving pulley group 25 and driven pulley group 26 are that width is belt-wheel hub structure of 58mm, and the width that this driving pulley group 25 and driven pulley group 26 width can be looked coiled strip 27 increases or reduce 10% adjustment.
The axial two ends of described first track adjusting wheel 12, second track adjusting wheel 14 and the 3rd track adjusting wheel 16 are equipped with track adjusting wheel back-up ring 11.
As shown in Figure 4, during the present embodiment operation, coiled strip 27 is coaxially installed on the unreeling shaft 7, by first track adjusting wheel 12 and second track adjusting wheel 14 it is imported the prestretching pressuring flat device, by the pressure control nut 10 on the adjustment pressure adaptive supporting frame 8, can regulate driving pulley group 25 and driven pulley group 26 spacings.The coiled strip 27 that flattens marches to batch feeding wheel 31 by after detecting wheel 1 below of hanging down through the 3rd track adjusting wheel 16.The quality of wheel 1 and the tension force of packaging bag are complementary because detection is hung down, and make that detecting vertical wheel 1 is subjected to gravity that the coiled strip 27 that passes through is imposed pulling force, makes coiled strip 27 keep uniform tension force to batch feeding wheel 29 all the time.When coiled strip 27 is spurred by batch feeding wheel 29, when making that detecting the wheel 1 that hangs down rises to upper limit sensor 5 gradually, upper limit sensor 5 drives driving pulley group 25 by the sensing chip 3 triggering back controlling and driving motors 24 that detect installation on the wheel 1 that hangs down and rotates, because the linear velocity that the reduction ratio of drive motor 24 satisfies first driving pulley 17 is at least greater than 20% condition of batch feeding wheel 29 maximum linear velocities, exported by the prestretching pressuring flat device with speed when making the coiled strip 27 of 26 of driving pulley group 25 and driven pulley groups be driven plain than the linear velocity fast at least 20% of batch feeding wheel line 29, detect to hang down simultaneously wheel 1 and sensing chip 3 is subjected to gravity to move downward to the position and the controlling and driving motor 24 that trigger lower limited sensor 4 and stop to make driving pulley group 25 and 26 stalls of driven pulley group, so circulation along detecting wheel 1 guide rail that hangs down.
Claims (8)
1. feeding apparatus of coiling packing bag, it is characterized in that, comprise: unreel guide piece, detect the wheel apparatus that hangs down, the prestretching pressuring flat device, batch feeding wheel and charging motor, wherein: unreel the coiled strip that is provided with pending coiling packing bag in the guide piece, by unreeling guide piece coiled strip is delivered to the prestretching pressuring flat device, the prestretching pressuring flat device, detecting the wheel apparatus that hangs down is connected with circuit with the charging motor, detecting the wheel apparatus that hangs down is movably set under the prestretching pressuring flat device, coiled strip is respectively through unreeling guide piece, enter batch feeding wheel behind the vertical wheel apparatus of prestretching pressuring flat device and detection, batch feeding wheel is arranged at the vertical wheel apparatus rear portion of detection and is connected with the charging motor coaxle;
The described guide piece that unreels comprises: unreeling shaft support, unreeling shaft, the first track adjusting wheel support, first track adjusting wheel, second track adjusting wheel, the 3rd track adjusting wheel support and the 3rd track adjusting wheel, wherein: unreeling shaft is fixedly set on the unreeling shaft support, first track adjusting wheel is propped up and is set up in directly over the unreeling shaft, first track adjusting wheel and second track adjusting wheel are located at the two ends of the first track adjusting wheel support respectively, the 3rd track adjusting wheel support and first track adjusting wheel are propped up and are set up in same horizontal surface, be respectively in the both sides of prestretching pressuring flat device, the 3rd track adjusting wheel is arranged on the 3rd track adjusting wheel support;
Detecting the wheel apparatus that hangs down comprises: detect the wheel that hangs down, detect hang down wheel guide rail, upper limit sensor, lower limited sensor and sensing chip, wherein: detect the wheel guide rail that hangs down and vertically place, detection is hung down, and taking turns slides is arranged on the vertical wheel of the detection guide rail, on the upper and lower edge of detecting the wheel guide rail that hangs down upper limit sensor and lower limited sensor are set respectively, sensing chip is located at and is detected on the wheel that hangs down;
Described prestretching pressuring flat device comprises: pressure adaptive support, pressure control nut, pressure spring, driving pulley group, imput shaft, driven pulley group and drive motor, wherein: pressure spring is installed on the pressure adaptive support by bolt, pressure control nut and the coaxial setting of pressure spring, drive motor links to each other with imput shaft, be arranged on the pressure adaptive support to driving pulley group and driven pulley group parallel vertical, coiled strip is arranged between driving pulley group and the driven pulley group.
2. feeding apparatus of coiling packing bag according to claim 1 is characterized in that, the axle axial two ends of described first track adjusting wheel, second track adjusting wheel and the 3rd track adjusting wheel are equipped with the track adjusting wheel back-up ring.
3. feeding apparatus of coiling packing bag according to claim 1 is characterized in that, the quality of the vertical wheel of described detection is 150 grams～450 grams.
4. feeding apparatus of coiling packing bag according to claim 1, it is characterized in that, described driving pulley group comprises: first driving pulley, second driving pulley, active belt, wherein: the up and down discrete setting and being nested in initiatively in the belt of first driving pulley and second driving pulley, first driving pulley and the coaxial setting of imput shaft drive second driving pulley by the active belt.
5. feeding apparatus of coiling packing bag according to claim 1, it is characterized in that, described driven pulley group comprises: first driven pulley, second driven pulley, driven belt, wherein: the up and down discrete setting and being nested in the driven belt of first driven pulley and second driven pulley.
6. according to claim 1 or 4 described feeding apparatus of coiling packing bag, it is characterized in that described driving pulley group width is belt-wheel hub structure of 55mm～63mm.
7. according to claim 1 or 5 described feeding apparatus of coiling packing bag, it is characterized in that described driven pulley group is that width is belt-wheel hub structure of 55mm～63mm.
8. feeding apparatus of coiling packing bag according to claim 1 is characterized in that, described drive motor is a reducing motor, and the reduction ratio of this motor is controlled at the external diameter linear velocity v that makes with its coaxial first driving pulley that links to each other
1The external diameter linear velocity v of batch feeding wheel of rotation links to each other with follow-up material motor coaxle
2Relation constantly satisfy: v
1＞MAX (v
2) * 120%, wherein MAX (v
2) be the external diameter linear velocity of batch feeding wheel when rotating with maximum speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100401355A CN101407255B (en) | 2008-07-03 | 2008-07-03 | Feeding apparatus of coiling packing bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100401355A CN101407255B (en) | 2008-07-03 | 2008-07-03 | Feeding apparatus of coiling packing bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101407255A CN101407255A (en) | 2009-04-15 |
| CN101407255B true CN101407255B (en) | 2011-02-16 |
Family
ID=40570514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100401355A Active CN101407255B (en) | 2008-07-03 | 2008-07-03 | Feeding apparatus of coiling packing bag |
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| CN (1) | CN101407255B (en) |
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| CN102774687B (en) * | 2012-07-10 | 2013-10-30 | 浙江捷华电子有限公司 | Integrated chip lead frame emptying device |
| CN102745525B (en) * | 2012-07-26 | 2014-11-26 | 中华商务联合印刷(广东)有限公司 | Automatic control cover feeding device of gluebinding covering machine and gluebinding covering machine |
| WO2018035987A1 (en) * | 2016-08-26 | 2018-03-01 | 江苏贸隆机械制造有限公司 | Belt transmission mechanism |
| CN109720907B (en) * | 2019-01-04 | 2021-04-02 | 湖南机电职业技术学院 | Adhesive tape releasing mechanism and photo adhesive tape sticking machine with same |
Citations (9)
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|---|---|---|---|---|
| DE2707958A1 (en) * | 1977-02-24 | 1978-08-31 | Bosch Gmbh Robert | DEVICE FOR PULLING THE LAP OF PACKAGING FROM A STORAGE ROLL |
| CN85200158U (en) * | 1985-04-01 | 1985-11-10 | 鞍山钢铁公司 | Double reel self-adjusting equal tension winding device |
| GB2177379A (en) * | 1985-06-26 | 1987-01-21 | Sitma | Device for controlling the unwinding of a plastics film in a packaging machine |
| EP0300780A2 (en) * | 1987-07-24 | 1989-01-25 | BAXTER INTERNATIONAL INC. (a Delaware corporation) | Apparatus for placing a web of film under tension |
| WO1995009121A1 (en) * | 1993-09-29 | 1995-04-06 | Kustner Industries S.A. | Device for controlling the feed motion of a packaging film in a packaging machine, and corresponding control method |
| JPH10147461A (en) | 1996-11-15 | 1998-06-02 | Sanko Kikai Kk | Packaging material feeding device for automatic packaging machine |
| CN2467415Y (en) * | 2001-02-28 | 2001-12-26 | (湖北)三九长江实业集团武汉轻工业机械厂 | Constant tension feeding wrapping material apparatus for composite film bag-making machine |
| CN1374242A (en) * | 2001-03-09 | 2002-10-16 | 三垦电气株式会社 | Apparatus for winding long materials |
| CN2626866Y (en) * | 2003-04-15 | 2004-07-21 | 常德烟机配件经销服务有限责任公司 | Uniform tension conveying device for film |
-
2008
- 2008-07-03 CN CN2008100401355A patent/CN101407255B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2707958A1 (en) * | 1977-02-24 | 1978-08-31 | Bosch Gmbh Robert | DEVICE FOR PULLING THE LAP OF PACKAGING FROM A STORAGE ROLL |
| CN85200158U (en) * | 1985-04-01 | 1985-11-10 | 鞍山钢铁公司 | Double reel self-adjusting equal tension winding device |
| GB2177379A (en) * | 1985-06-26 | 1987-01-21 | Sitma | Device for controlling the unwinding of a plastics film in a packaging machine |
| EP0300780A2 (en) * | 1987-07-24 | 1989-01-25 | BAXTER INTERNATIONAL INC. (a Delaware corporation) | Apparatus for placing a web of film under tension |
| WO1995009121A1 (en) * | 1993-09-29 | 1995-04-06 | Kustner Industries S.A. | Device for controlling the feed motion of a packaging film in a packaging machine, and corresponding control method |
| JPH10147461A (en) | 1996-11-15 | 1998-06-02 | Sanko Kikai Kk | Packaging material feeding device for automatic packaging machine |
| CN2467415Y (en) * | 2001-02-28 | 2001-12-26 | (湖北)三九长江实业集团武汉轻工业机械厂 | Constant tension feeding wrapping material apparatus for composite film bag-making machine |
| CN1374242A (en) * | 2001-03-09 | 2002-10-16 | 三垦电气株式会社 | Apparatus for winding long materials |
| CN2626866Y (en) * | 2003-04-15 | 2004-07-21 | 常德烟机配件经销服务有限责任公司 | Uniform tension conveying device for film |
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| CN101407255A (en) | 2009-04-15 |
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