CN108582969B - Flexography paper feeding system - Google Patents
Flexography paper feeding system Download PDFInfo
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- CN108582969B CN108582969B CN201810160530.0A CN201810160530A CN108582969B CN 108582969 B CN108582969 B CN 108582969B CN 201810160530 A CN201810160530 A CN 201810160530A CN 108582969 B CN108582969 B CN 108582969B
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- roller
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- treatment
- surface adhesive
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- 238000007647 flexography Methods 0.000 title abstract description 4
- 230000007246 mechanism Effects 0.000 claims abstract description 71
- 239000012790 adhesive layer Substances 0.000 claims abstract description 47
- 238000004804 winding Methods 0.000 claims abstract description 44
- 238000007639 printing Methods 0.000 claims abstract description 36
- 238000011282 treatment Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 30
- 102000008186 Collagen Human genes 0.000 claims abstract description 16
- 108010035532 Collagen Proteins 0.000 claims abstract description 16
- 229920001436 collagen Polymers 0.000 claims abstract description 16
- 230000007306 turnover Effects 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 238000007645 offset printing Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 56
- 238000000926 separation method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/02—Conveying or guiding webs through presses or machines
Abstract
The invention relates to a flexography paper feeding system. It has solved prior art design irrational scheduling problem. The flexible printing paper feeding system comprises a frame, wherein the frame is sequentially provided with: an unreeling mechanism; the first treatment mechanism is used for carrying out UV treatment on the surface adhesive layer of the unreeled single-sided back collagen material and separating after the UV treatment; the second treatment mechanism is used for carrying out ink and UV treatment on the other surface of the separated surface adhesive layer and compounding the second release paper with the surface adhesive layer; the turnover reversing mechanism reverses the composite product, namely, the upper surface of the release paper II is provided with a surface adhesive layer; and thirdly, the upper surface of the surface adhesive layer is subjected to ink printing and UV treatment, and the winding mechanism is used for winding the offset printing product. The invention has the advantages that: low cost, and can improve the production efficiency and the product strength.
Description
Technical Field
The invention belongs to the technical field of printing, and particularly relates to a flexible printing paper feeding system.
Background
Traditional single-sided back collagen materials can only be manufactured by a plurality of devices when one side is printed.
The multiple machining processes not only require material transfer and transportation between two adjacent devices, but also require a large floor space, which results in the problems of high cost and low efficiency of the existing production line.
Second, the existing single-sided back collagen material has poor surface strength, which results in the phenomenon of easy scratching and the like.
Accordingly, based on the above-mentioned technical problems, there is a need to develop a paper feeding system that can solve the above-mentioned technical problems.
Disclosure of Invention
The invention aims to solve the problems and provide a flexible printing paper feeding system which is low in cost and capable of improving production efficiency and improving product strength.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the flexible printing paper feeding system comprises a frame, wherein the frame is sequentially provided with:
the unreeling mechanism is used for unreeling the single-sided back collagen material;
the first treatment mechanism is used for carrying out UV treatment on the surface adhesive layer of the unreeled single-sided back collagen material and separating after the UV treatment, namely, separating the first release paper and the surface adhesive layer subjected to the surface UV treatment;
the second treatment mechanism is used for carrying out ink and UV treatment on the other surface of the separated surface adhesive layer, and compositing the second release paper with the surface adhesive layer, namely, obtaining a composite product with the surface adhesive layer composited on the lower surface of the second release paper;
the turnover reversing mechanism reverses the composite product, namely, the upper surface of the release paper II is provided with a surface adhesive layer;
the third treatment mechanism is used for carrying out ink printing and UV treatment on the upper surface of the surface adhesive layer, namely, obtaining a offset printing product;
and the winding mechanism is used for winding the offset printing brush killing product.
In the flexible printing paper feeding system, the turnover reversing mechanism comprises two cantilever rollers, a fixed plate is connected between the suspended ends of the two cantilever rollers, a first steering roller is arranged on the outer surface of the fixed plate, the diameter of the first steering roller is larger than the width of the fixed plate, a second steering roller and a third steering roller are arranged between the two cantilever rollers, the second steering roller and the third steering roller are distributed in a cross shape and are located above the third steering roller, the separated surface adhesive layer is firstly contacted with one cantilever roller close to the first processing mechanism, the separated surface adhesive layer horizontally extends to the upper side of the third steering roller and downwards surrounds the third steering roller, the separated surface adhesive layer horizontally extends to the first steering roller and upwards surrounds the first steering roller, the separated surface adhesive layer horizontally extends to the upper side of the first steering roller and downwards surrounds the second steering roller, and the separated surface adhesive layer horizontally extends to the lower side of the second steering roller and horizontally contacts with the other cantilever roller and upwards extends.
In the flexible printing paper feeding system, the unreeling mechanism comprises an unreeling roller, a material receiving platform is arranged at the rear of the unreeling roller, a plurality of unreeling tensioning rollers which are sequentially arranged are arranged at the rear of the material receiving platform, and rolled single-sided back collagen materials are sleeved on the unreeling roller and sequentially pass through the material receiving platform and the unreeling tensioning rollers.
In the flexible printing paper feeding system, at least one pressing block which is arranged on the upper surface of the receiving platform at intervals is arranged on the upper surface of the receiving platform, and the single-sided back collagen material passes through the space between the upper surface of the receiving platform and the pressing block.
In the above-mentioned flexography paper feeding system, the first processing mechanism comprises a first UV processing box, a first corner roller is arranged on the front side of the first UV processing box, a separating roller is arranged on the rear side of the first UV processing box, and the first corner roller is located below the left side of the separating roller.
In the above flexible printing paper feeding system, the first processing mechanism further comprises a winding device capable of winding the release paper, and a first ink roller for printing the separated release paper.
In the flexible printing paper feeding system, the winding device comprises a winding roller I positioned above a corner roller I, a winding roller II is arranged below the left side of the winding roller I, a winding roller III is arranged right above the winding roller II, and at least one winding roller IV is arranged above the three sides of the winding roller.
In the flexible printing paper feeding system, the second processing mechanism comprises a second ink printing wheel positioned above the left side of the separating roller, a second UV processing box is arranged above the right side of the second ink printing wheel, a second corner roller is arranged on the front side of the second UV processing box, a third corner roller is arranged on the rear side of the second UV processing box, the second corner roller is positioned below the left side of the third corner roller, and at least one middle guide roller is arranged behind the third corner roller.
In the flexible printing paper feeding system, the third processing mechanism comprises at least one guide roller positioned behind the turnover reversing mechanism, the third printing wheel is arranged on the rear side of the rearmost guide roller, the third UV processing box is arranged above the right side of the third printing wheel, the fourth corner roller is arranged on the front side of the third UV processing box, the fifth corner roller is arranged on the rear side of the fourth UV processing box, and the fourth corner roller is positioned below the left side of the fifth corner roller.
In the flexible printing paper feeding system, the winding mechanism comprises a plurality of winding roller bodies which are positioned behind the processing mechanism III and are sequentially arranged.
Compared with the prior art, the flexible printing paper feeding system has the advantages that:
1. the mutual synergistic effect of the mechanisms not only improves the production efficiency, but also improves the structural strength of the product, and simultaneously, the production efficiency can be improved, and the production and manufacturing cost of enterprises is reduced intangibly.
The mechanisms are mutually cooperated, so that the occupied area is reduced, the manufacturing cost of equipment can be reduced, and the device is more reasonable in design and stronger in practicability.
2. The structure is simpler.
Drawings
Fig. 1 is a simplified diagram of a system provided by the present invention.
Fig. 2 is a schematic view of the structure of the present invention with the frame removed.
Fig. 3 is a simplified diagram of the turn-over reversing mechanism provided by the present invention.
Fig. 4 is a schematic structural diagram of a receiving platform provided by the invention.
Fig. 5 is a schematic view of another view angle structure of the receiving platform provided by the invention.
In the figure, a frame 1, an unreeling mechanism 2, an unreeling roller 21, a receiving platform 22, a cantilever plate 221, a vertical plate 222, a receiving roller 223, a horizontally arranged plate 224, an unreeling tension roller 23, a pressing block 24, a first processing mechanism 3, a UV processing box 31, a corner roller 32, a separating roller 33, a reeling device 34, a reeling roller 341, a reeling roller 342, a reeling roller 343, a reeling roller 344, a color wheel 35, a processing mechanism 4, an ink roller 41, a UV processing box 42, a corner roller 43, a corner roller 44, a middle guide roller 45, a turnover reversing mechanism 5, a cantilever roller 51, a fixed plate 52, a reversing roller 53, a reversing roller 54, a reversing roller 55, a processing mechanism 6, a guide roller 61, an ink roller 62, a UV processing box 63, a corner roller 64, a corner roller 65, a reeling mechanism 7, a reeling roller 71, a single-sided backing material a, a release paper b, a surface adhesive layer c and a release paper d are shown.
Detailed Description
The following are specific embodiments of the invention and the technical solutions of the invention will be further described with reference to the accompanying drawings, but the invention is not limited to these embodiments.
Example 1
As shown in fig. 1-2, the flexo printing paper feeding system comprises a frame 1, wherein the frame 1 comprises a rear positioning plate and a front positioning plate connected to the front surface of the rear positioning plate, and a space is reserved between the rear positioning plate and the front positioning plate.
The machine frame 1 is provided with:
the unreeling mechanism 2 is used for unreeling the single-sided back collagen material a;
the first treatment mechanism 3 is used for carrying out UV treatment on the surface adhesive layer of the unreeled single-sided back collagen material and separating after the UV treatment, namely, separating the release paper b and the surface adhesive layer c with the surface UV treatment;
the second treatment mechanism 4 is used for carrying out ink and UV treatment on the other surface of the separated surface adhesive layer, and compositing the second release paper d with the surface adhesive layer c, namely, obtaining a composite product with the surface adhesive layer c composited on the lower surface of the second release paper d;
the turnover reversing mechanism 5 reverses the composite product, namely, the upper surface of the release paper d is provided with a surface adhesive layer c;
the third processing mechanism 6 is used for carrying out ink printing and UV processing on the upper surface of the surface adhesive layer c, namely, obtaining a offset printing product;
and the winding mechanism 7 is used for winding the offset printing product.
The unreeling mechanism 2, the first processing mechanism 3, the second processing mechanism 4, the turnover reversing mechanism 5, the third processing mechanism 6 and the reeling mechanism 7 are respectively arranged in the space.
Specifically, the single-sided back collagen material a is provided with the release paper b, when the release paper b is separated, the surface adhesive layer c on one side of the release paper b is treated for the first time, and the release paper b is separated after the treatment is finished.
After separation, the surface glue layer c is subjected to ink and a second UV treatment, and the release paper b is wound upwards.
And the surface adhesive layer c after the second UV treatment is in composite connection with the release paper d, and the surface adhesive layer c at the moment is positioned on the lower surface of the release paper d.
And the surface adhesive layer c is positioned on the upper surface of the release paper d through the turnover reversing mechanism 5, namely, the surface adhesive layer c is turned.
The side of the surface gum layer c remote from the release paper d is then finally inked and subjected to a third UV treatment, i.e. the final offset printing product is produced.
In this embodiment, through three UV treatments, the structural performance, particularly the strength performance, of the two surfaces of the surface adhesive layer c can be improved, so that the effect of enhancing the structure can be achieved, and the service life is prolonged in an intangible manner.
And secondly, the turning mechanism can realize turning, so that the cost increase and the occupation of a large space area caused by the splicing of a plurality of devices are avoided, and meanwhile, the practicability of the devices is greatly improved and the production efficiency is improved.
Specifically, as shown in fig. 2-3, the turn-over reversing mechanism 5 of the embodiment includes two cantilever rollers 51, a fixed plate 52 is connected between the suspended ends of the two cantilever rollers 51, a first turning roller 53 is disposed on the outer surface of the fixed plate 52, the diameter of the first turning roller 53 is larger than the width of the fixed plate 52, a second turning roller 54 and a third turning roller 55 are disposed between the two cantilever rollers 51, the second turning roller 54 and the third turning roller 55 are distributed in a cross shape, the second turning roller 54 is located above the third turning roller 55, the separated surface adhesive layer c is firstly contacted with one cantilever roller 51 close to the first processing mechanism 3, the separated surface adhesive layer c extends to the upper side of the third turning roller 55 in a horizontal state and surrounds the third turning roller 55 downwards, the separated surface adhesive layer c extending from the lower side of the third turning roller 55 is contacted with the first turning roller 53 in a horizontal state and surrounds the first turning roller 53 upwards, the separated surface adhesive layer c extending from the upper side of the first turning roller 53 is contacted with the second turning roller 54 in a horizontal state and surrounds the upper side of the second turning roller 54 downwards, and the separated surface adhesive layer c extends upwards from the upper side of the second turning roller 54 is contacted with the other surface of the upper side of the first cantilever roller.
Specifically, the unreeling mechanism 2 of this embodiment includes an unreeling roller 21, a receiving platform 22 is disposed at the rear of the unreeling roller 21, a plurality of unreeling tensioning rollers 23 are disposed at the rear of the receiving platform 22 in sequence, and a rolled single-sided back collagen material a is sleeved on the unreeling roller 21 and sequentially passes through the receiving platform 22 and the unreeling tensioning rollers 23.
In an optimized solution, as shown in fig. 4-5, at least one pressing block 24 is disposed on the upper surface of the receiving platform 22 and spaced from the upper surface of the receiving platform 22, and the single-sided back collagen material a passes between the upper surface of the receiving platform 22 and the pressing block 24.
Secondly, the material receiving platform 22 comprises a cantilever plate 221, vertical plates 222 are respectively arranged at two ends of the cantilever plate 221, material receiving rollers 223 positioned at two sides of the cantilever plate 221 are arranged between the two vertical plates 222, a flat plate 224 positioned between the two material receiving rollers 223 is arranged between the two vertical plates 222, two material pressing blocks 24 are fixed on the flat plate 224, and the material pressing blocks 24 are arranged left and right.
In addition, the two flat plates 224 are located in the same horizontal plane, and a plurality of springs are respectively arranged at intervals on one side of the two flat plates, which are in contact with each other, so that the designed springs can eliminate the left-right swinging phenomenon caused by suspension.
Specifically, as shown in fig. 1-2, the first processing mechanism 3 of the present embodiment includes a first UV processing box 31, a first corner roller 32 is disposed on the front side of the first UV processing box 31, and a separation roller 33 is disposed on the rear side of the first UV processing box 31, wherein the first corner roller 32 is disposed below the left side of the separation roller 33.
Next, the first processing mechanism 3 further includes a winding device 34 capable of winding the release paper b, and an ink wheel 35 for printing the separated release paper b.
The winding device 34 includes a first winding roller 341 disposed above the first corner roller 32, a second winding roller 342 disposed below the left side of the first winding roller 341, a third winding roller 343 disposed right above the second winding roller 342, and at least a fourth winding roller 344 disposed above the third winding roller 343.
Specifically, the second processing mechanism 4 of the present embodiment includes a second ink roller 41 located above the left side of the separation roller 33, a second UV processing box 42 is disposed above the right side of the second ink roller 41, a second corner roller 43 is disposed in front of the second UV processing box 42, a third corner roller 44 is disposed at the rear side of the second UV processing box 42, the second corner roller 43 is located below the left side of the third corner roller 44, and at least one intermediate guide roller 45 is disposed behind the third corner roller 44.
Specifically, the third processing mechanism 6 of the present embodiment includes at least one guide roller 61 located behind the turnover reversing mechanism 5, a third color wheel 62 is disposed on the rear side of the rearmost guide roller 61, a third UV processing box 63 is disposed above the right side of the third color wheel 62, a fourth corner roller 64 is disposed on the front side of the third UV processing box 63, a fifth corner roller 65 is disposed on the rear side of the fourth UV processing box, and the fourth corner roller 64 is located below the left side of the fifth corner roller 65.
Specifically, the winding mechanism 7 of the present embodiment includes a plurality of winding roller bodies 71 disposed in sequence behind the third processing mechanism 6.
The color wheel may also be an ink roller.
The first UV process cartridge 31, the second UV process cartridge 42, and the third UV process cartridge 63 are connected to exhaust pipes, respectively, which are connected to exhaust manifolds, respectively.
An exhaust device is arranged in the exhaust manifold.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The flexible printing paper feeding system comprises a frame (1), and is characterized in that the frame (1) is sequentially provided with:
the unreeling mechanism (2), the unreeling mechanism (2) is used for unreeling the single-sided back collagen material (a);
the first treatment mechanism (3) is used for carrying out UV treatment on the surface adhesive layer of the unreeled single-sided back collagen material and separating after the UV treatment, namely, separating the first release paper (b) and the surface adhesive layer (c) subjected to the surface UV treatment;
the second treatment mechanism (4) is used for carrying out ink and UV treatment on the other surface of the separated surface adhesive layer, and compositing the second release paper (d) with the surface adhesive layer (c), namely, a composite product with the surface adhesive layer (c) composited on the lower surface of the second release paper (d) is obtained;
the turnover reversing mechanism (5) reverses the composite product, namely, the upper surface of the release paper II (d) is provided with a surface adhesive layer (c);
a third treatment mechanism (6) for performing ink and UV treatment on the upper surface of the surface adhesive layer (c), namely obtaining a offset printing product;
and the winding mechanism (7) is used for winding the offset printing product.
2. The flexible printing paper feeding system according to claim 1, wherein the turnover reversing mechanism (5) comprises two cantilever rollers (51), a fixed plate (52) is connected between the suspended ends of the two cantilever rollers (51), a first steering roller (53) is arranged on the outer surface of the fixed plate (52), the diameter of the first steering roller (53) is larger than the width of the fixed plate (52), a second steering roller (54) and a third steering roller (55) are arranged between the two cantilever rollers (51), the second steering roller (54) and the third steering roller (55) are distributed in a cross shape, the second steering roller (54) is positioned above the third steering roller (55), the separated surface adhesive layer (c) is firstly contacted with one cantilever roller (51) close to the first processing mechanism (3), the separated surface adhesive layer (c) extends to the upper side of the third steering roller (55) in a horizontal state and surrounds the third steering roller (55), the separated surface adhesive layer (c) extends from the first steering roller (53) in a horizontal state and surrounds the upper side of the second steering roller (53) in a horizontal state and is upwards surrounds the upper steering roller (54) which is contacted with the upper surface of the second steering roller (54), the separated surface adhesive layer (c) extending from the lower side of the second steering roller (54) is horizontally contacted with the other cantilever roller (51) and extends upwards.
3. The flexible printing paper feeding system according to claim 1, wherein the unreeling mechanism (2) comprises an unreeling roller (21), a material receiving platform (22) is arranged behind the unreeling roller (21), a plurality of unreeling tensioning rollers (23) which are sequentially arranged behind the material receiving platform (22) are arranged behind the material receiving platform (22), and rolled single-sided back collagen materials (a) are sleeved on the unreeling roller (21) and sequentially pass through the material receiving platform (22) and the unreeling tensioning rollers (23).
4. A flexo printing paper feeding system according to claim 3, wherein the upper surface of the receiving platform (22) is provided with at least one presser block (24) spaced from the upper surface of the receiving platform (22), and the single-sided back collagen material (a) passes between the upper surface of the receiving platform (22) and the presser block (24).
5. A flexo printing paper feeding system according to claim 1, wherein the first processing mechanism (3) comprises a first UV processing box (31), a first corner roller (32) is arranged at the front side of the first UV processing box (31), a separating roller (33) is arranged at the rear side of the first UV processing box (31), and the first corner roller (32) is positioned below the left side of the separating roller (33).
6. The flexible printing paper feeding system according to claim 5, wherein the first processing mechanism (3) further comprises a winding device (34) capable of winding the release paper (b), and a first ink wheel (35) for printing the release paper (b) after separation.
7. The flexible printing paper feeding system according to claim 6, wherein the winding device (34) comprises a winding roller one (341) located above the corner roller one (32), a winding roller two (342) is arranged below the left side of the winding roller one (341), a winding roller three (343) is arranged right above the winding roller two (342), and at least one winding roller four (344) is arranged above the side of the winding roller three (343).
8. The flexo printing paper feeding system according to claim 5, wherein the second processing mechanism (4) comprises a second ink roller (41) positioned above the left side of the separating roller (33), a second UV processing box (42) is arranged above the right side of the second ink roller (41), a second corner roller (43) is arranged at the front side of the second UV processing box (42), a third corner roller (44) is arranged at the rear side of the second UV processing box (42), the second corner roller (43) is positioned below the left side of the third corner roller (44), and at least one intermediate guide roller (45) is arranged behind the third corner roller (44).
9. A flexo printing paper feeding system according to claim 1, wherein the third processing mechanism (6) comprises at least one guiding roller (61) positioned behind the turnover reversing mechanism (5), the third printing wheel (62) is arranged at the rear side of the rearmost guiding roller (61), the third UV processing box (63) is arranged above the right side of the third printing wheel (62), the fourth corner roller (64) is arranged at the front side of the third UV processing box (63), the fifth corner roller (65) is arranged at the rear side of the fourth UV processing box (), and the fourth corner roller (64) is positioned below the left side of the fifth corner roller (65).
10. A flexographic paper feed system according to claim 1, characterized in that the winding mechanism (7) comprises a number of sequentially arranged winding roller bodies (71) located behind the third processing mechanism (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810160530.0A CN108582969B (en) | 2018-02-27 | 2018-02-27 | Flexography paper feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810160530.0A CN108582969B (en) | 2018-02-27 | 2018-02-27 | Flexography paper feeding system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108582969A CN108582969A (en) | 2018-09-28 |
| CN108582969B true CN108582969B (en) | 2024-04-05 |
Family
ID=63609029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810160530.0A Active CN108582969B (en) | 2018-02-27 | 2018-02-27 | Flexography paper feeding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108582969B (en) |
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| DE102007006909A1 (en) * | 2007-02-13 | 2008-09-04 | Koenig & Bauer Aktiengesellschaft | Rotary printing press system has two or more towers for double sided printing and one tower for double sided printing of two paper feeds |
| JP4408945B1 (en) * | 2009-01-14 | 2010-02-03 | 三起機械株式会社 | Duplex printing device |
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2018
- 2018-02-27 CN CN201810160530.0A patent/CN108582969B/en active Active
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|---|---|---|---|---|
| JPH05338893A (en) * | 1992-06-12 | 1993-12-21 | Canon Inc | Image forming device |
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|---|---|
| CN108582969A (en) | 2018-09-28 |
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