CN101811399A - Double-side printing device - Google Patents
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- CN101811399A CN101811399A CN200910008317A CN200910008317A CN101811399A CN 101811399 A CN101811399 A CN 101811399A CN 200910008317 A CN200910008317 A CN 200910008317A CN 200910008317 A CN200910008317 A CN 200910008317A CN 101811399 A CN101811399 A CN 101811399A
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Abstract
The invention relates to a double-side printing device, which comprises a paper feeding box, a first paper-out box, a second paper-out box, a plurality of roller groups, a first paper feeding channel, a second paper feeding channel, a laser printing module, an ink-jet printing module, a first paper taking roller, a second paper taking roller module and a control circuit. By installing the first paper-out box and the second paper taking roller module, the double-side printing device prevents the paper from generating wrinkles owing to different printing speeds of the laser printing module and the ink-jet printing module.
Description
Technical field
The present invention relates to printing device, relate in particular to the double-side printing device that can be applicable to carry out double-side printing.
Background technology
In the office in modern times, printing device is indispensable instrument, and printing device comprises duplicator, printer, scanning machine and affairs machine or the like, and wherein the most normal what be used is exactly printer.General printer is only to have a function that single face prints, when the user needs double-side printing, first page of document in the computer printd in paper blank first, after document is printd for first page and is finished, must will be printed on the paper turn-over of first page of image of document and put into the feeding box of printer, on second of this paper, print again second page of the document, if document number of pages quantity is very big, the action that manual repeatedly turn-over like this is put paper brings sizable puzzlement to the user, therefore, but develop a kind of double-side printing device of double-side printing on the market.
General double-side printing device is for being provided with two groups of laser module of prining in double-side printing device inside, and utilizes the laser module of prining carbon dust to be attached on first of paper, and another laser module of prining then is attached to carbon dust on second of paper.The speed of prining of two-sided laser printing device is very fast, relatively saves time, and the cost of module is higher but laser is printd.
Therefore release a kind of lower-cost double-side printing device on the market, see also Fig. 1, it is the structural representation of known double-side printing device.Double-side printing device 1 comprises feeding box 10, paper output box 11, pickup roller 12, paper-feeding channel 13, laser print module 14, ink-jet print module 15 and paper delivery roller set 16.Feeding box 10 is in order to place blank paper P, paper after paper output box 11 is printd in order to placement, paper-feeding channel 13 is arranged between feeding box 10 and the paper output box 11, with so that paper P passes through in paper-feeding channel 13, and pickup roller 12 is in order to be fed to paper P in the paper-feeding channel 13 by feeding box 10.The laser module 14 of prining is arranged at a side of paper-feeding channel 13, and on image is printd in paper P first, module 15 is arranged at the opposite side of paper-feeding channel 13 and ink-jet is printd, on image is printd in paper P second.16 of paper delivery roller set in order to paper feeding to paper output box 11.
The laser module 14 of prining comprises laser scan unit 141 (Laser scanning unit), photosensitive drums 142 (Optical photoconductive drum), cloth electricity roller 143 (Charging roller), video picture roller 144 (Developer roller), transfer rolling wheel 145 (Toner adding roller) and is deciding roller set 146.And print module 15 of ink-jet is the ink-jet column print head, in order to spray ink on paper P.
Please continue to consult Fig. 1, when known double-side printing device 1 will carry out double-side printing to a two-sided file, the image that document is first page was read, and this first page of image data is sent to laser scan unit 141.Then, cloth electricity roller 143 is distributed on the photosensitive drums 142 charged ion, and after the cloth electricity was finished, laser scan unit 141 scanned first page of image data linearly on photosensitive drums 142 with the form point of laser and makes first page of image data form electrostatic latent image (Electrostatic latent image).Then, the carbon dust in the individual toner cartridges (figure do not show) is attached on the video picture roller 144, and carbon dust is projected to the part that is furnished with electrostatic latent image on the photosensitive drums 142, makes the part that has electrostatic latent image on the photosensitive drums 142 be covered with carbon dust.Print after module 14 finishes above image processing program at laser, paper P is presented by feeding box 10 by pickup roller 12 and enters paper-feeding channel 13, when being fed between photosensitive drums 142 and the transfer rolling wheel 145 again, paper is attracted to the surface of photosensitive drums 142 and contacts with carbon dust.Again owing to be positioned at and have on the transfer rolling wheel 145 of back side of paper and the electrical opposite current potential of carbon dust, so the carbon dust on the photosensitive drums 142 is adsorbed on first of paper.Then, the paper that adheres to carbon dust is fed to enter is deciding roller set 146, at this moment, is deciding roller set 146 and is utilizing hot pressuring method that the carbon dust fusion is infiltrated in the fiber of paper and carbon dust can be fixed on the paper P, so far, first of document page of image data printd and finished.
Then, paper P is fed through the ink-jet module 15 of prining, and the ink-jet module 15 of prining is sprayed ink according to second page of image of document on paper P, second page of image is presented on second of paper P, at last, paper P is fed to paper output box 11 by paper delivery roller set 16, and double-side printing is finished.
According to as can be known above-mentioned, known double-side printing device replaces another laser module of prining with the ink-jet module of prining, to reduce cost, yet, must carry out prining of two kinds of types in the known double-side printing device, and the print speed of prining of module of laser is faster than the print speed of prining of module of ink-jet, make paper laser print finish after when carrying out ink-jet and print, the speed of the front end of paper and end is inconsistent, make that top of form continues to be fed, but the end of paper then because of with different the bending and fold of speed of front end, when print module and ink-jet of laser printd the speed of prining of module when differing too many, paper is terminal even can squeeze a ball and make paper no longer smooth, causes the ink-jet quality of prining bad.In addition, the speed of prining of module is faster than the print speed of prining of module of ink-jet because laser is printd, when making a paper of winning ink-jet being printd in module is printd in ink-jet, second paper can't begin to carry out laser and print, and must treat that first paper is near completion or when having finished ink-jet and prining, second paper just can carry out laser prints, and has therefore prolonged the time that paper is printd continuously.
Summary of the invention
Purpose of the present invention is providing a kind of ink-jet print double-side printing device of module of module and laser of prining that has simultaneously.
Purpose of the present invention is at the double-side printing device that provides a kind of saving to print the time.
In a preferred embodiment, the invention provides a kind of double-side printing device, in order to image is printd on one first and one second an of paper, this double-side printing device comprises:
One feeding box is in order to place this paper;
One first paper output box is in order to place this paper;
One second paper output box is in order to place this paper;
One first paper-feeding channel is between this feeding box and this first paper output box;
One first pickup roller between this feeding box and this first paper-feeding channel, enters in this first paper-feeding channel in order to this paper is presented by this feeding box;
One second paper-feeding channel is between this first paper output box and this second paper output box;
One second pickup roller module between this first paper output box and this second paper-feeding channel, enters in this second paper-feeding channel in order to this paper feeding that will be placed on this first paper output box;
A plurality of roller set are arranged on this first paper-feeding channel and this second paper-feeding channel, in order to present this paper;
The one laser module of prining is positioned on this first paper-feeding channel, in order in the district that prints at a laser image is printd on this first of this paper; And
The one ink-jet module of prining is positioned on this second paper-feeding channel, in order in the district that prints in an ink-jet image is printd on this second of this paper.
In a preferred embodiment, this second pickup roller module comprises:
One second pickup roller;
One comber;
One gets the paper arm, is connected in this second pickup roller and this comber, uses so that this second pickup roller carries out moving with respect to this comber; And
One separation friction plate enters this second paper-feeding channel in order to replace this paper and to cooperate and provide frictional force to make this paper once only be fed one with this comber.
In a preferred embodiment, double-side printing device of the present invention also comprises a control circuit, in order to control the roller velocity of rotation of described a plurality of roller set, this first pickup roller and this second pickup roller module.
In a preferred embodiment, this laser module of prining comprises a laser scan unit, a photosensitive drums, cloth electricity roller, a video picture roller, a transfer rolling wheel and certain roller set.
In a preferred embodiment, this is being decided roller set and is being arranged on this paper-feeding channel, and this is being decided roller set and comprises:
One heating roller is in order to provide heat energy that this laser is printd carbon dust fusion that module produced; And
One roller that bears down on one is attached on first of this paper in order to this paper pressurization is made carbon dust.
In a preferred embodiment, described a plurality of roller set comprises:
One first paper feed roller set is positioned on this first paper-feeding channel;
One second paper feed roller set is positioned on this second paper-feeding channel;
One first paper delivery roller set, between this first paper-feeding channel and this first paper output box, in order to this paper feeding to this first paper output box; And
One second paper delivery roller set, between this second paper-feeding channel and this second paper output box, in order to this paper feeding to this second paper output box.
In a preferred embodiment, this first paper feed roller set has one first paper feed speed, and this second paper feed roller set has than the slow-footed one second paper feed speed of this first paper feed.
In a preferred embodiment, this ink-jet module of prining comprises:
One ink-jet column print head makes this ink be attached on this second of this paper in order to the ejection ink; And
One transmission mechanism is connected in this ink-jet column print head, in order to move this ink-jet column print head.
In a preferred embodiment, this ink-jet column print head is positioned at the top of this paper-feeding channel, and the ink that this ink-jet column print head is produced is sprayed on this paper from top to bottom.
Description of drawings
Fig. 1 is the structural representation of known double-side printing device.
Fig. 2 is a double-side printing device of the present invention structural representation in a preferred embodiment.
Wherein, description of reference numerals is as follows:
1,2 double-side printing devices, 10,20 feeding box
11,21,29 paper output box, 12,27 pickup roller groups
13,23,28 paper-feeding channels, 14, the 24 laser module of prining
15,25 ink-jets module 16,223, the 224 paper delivery roller set of prining
22 roller set, 26,271 pickup rollers
141,241 laser scan units, 142,242 photosensitive drums
143,243 cloth electricity roller, 144,244 video picture rollers
145,245 transfer rolling wheels 146,246 are being decided roller set
221,222 paper feed roller set, the 247 laser district that prints
251 ink-jet column print head, 252 transmission mechanisms
253 ink-jets are printd and are distinguished 272 combers
273 get paper arm 274 separation friction plates
2461 heating rollers 2462 rollers that bear down on one
C control circuit P, P
*Paper
The specific embodiment
See also Fig. 2, it is a double-side printing device of the present invention structural representation in a preferred embodiment.Among Fig. 2, double-side printing device 2 comprises feeding box 20, first paper output box 21, second paper output box 29, a plurality of roller set 22, first paper-feeding channel 23, second paper-feeding channel 28, laser print module 24, ink-jet print module 25, first pickup roller 26, the second pickup roller module 27 and control circuit C.
In the double-side printing device 2, feeding box 20 is in order to place blank paper P
*, first paper output box 21 in order to place blank or print after paper, the paper after second paper output box 29 is then printd in order to placement.First paper-feeding channel 23 is arranged between the feeding box 20 and first paper output box 21, uses so that paper P
*In paper-feeding channel 23, pass through, and second paper-feeding channel 28 is arranged between first paper output box 21 and second paper output box 29.First pickup roller 26 is between the feeding box 20 and first paper-feeding channel 23, in order to paper P
*Present by feeding box 20 and to enter in first paper-feeding channel 23, and the second pickup roller module 27 is between first paper output box 21 and second paper-feeding channel 28, in order to paper P
*Present by first paper output box 21 and to enter in second paper-feeding channel 28, and the second pickup roller module 27 comprises second pickup roller 271, comber 272, gets each element detailed description more after a while in paper arm 273 and separation friction plate 274, the second pickup roller modules 27.The laser module 24 of prining is positioned on first paper-feeding channel 23, in order to image is printd in paper P
*First on, module 25 is arranged on second paper-feeding channel 28 and ink-jet is printd, in order to image is printd in paper P
*Second on.And a plurality of paper feed roller set 22 are arranged on first paper-feeding channel 23 and second paper-feeding channel 28, in order to paper feeding P
*, wherein a plurality of roller set 22 comprise in the first paper feed roller set 221 on first paper-feeding channel 23, in the second paper feed roller set 222 on second paper-feeding channel 28, in first paper delivery roller set 223 between first paper-feeding channel 23 and first paper output box 21 and the second paper delivery roller set 224 between second paper-feeding channel 28 and second paper output box 29.
The laser module 24 of prining comprises laser scan unit 241, photosensitive drums 242, cloth electricity roller 243, video picture roller 244, transfer rolling wheel 245 and is deciding roller set 246, print transfer rolling wheel 245 in the module 24 of laser is arranged at a side of first paper-feeding channel 23, print all the other elements in the module 24 of laser then are positioned at the opposite side of first paper-feeding channel 23, make paper P
*Can enter print district 247 and carry out laser and print of laser between photosensitive drums 242 and the photosensitive drums 242.Deciding 246 of roller set and comprising heating roller 2461 and the roller 2462 that bears down on one, heating roller 2461 is in order to provide heat energy that laser is printd carbon dust fusion that individual toner cartridges (not shown) in the module 24 produced, and the roller 2462 that bears down on one is in order to paper P
*Pressurization makes carbon dust be attached to paper P
*First on.
Comprise ink-jet column print head 251 and transmission mechanism 252 as for ink-jet 25 of the modules of prining, ink-jet column print head 251 makes ink be attached to paper P in order to the ejection ink
*Second on, and transmission mechanism 252 is connected in ink-jet column print head 251, makes ink-jet column print head 251 at paper P in order to mobile ink-jet column print head 251
*Second go up to move and the ejection ink.Ink-jet column print head 251 is positioned at a side of second paper-feeding channel 28 and faces paper P
*Second so that to paper P
*Second face print, what need to specify is, ink-jet column print head 251 is positioned at the top of second paper-feeding channel 28, the ink that ink-jet column print head 251 is produced is sprayed on paper P from top to bottom
*On.So the reason of design is, ink can spray downwards naturally in response to centrifugal force, thereby can guarantee the ink-jet quality of prining.And laser the print operational circumstances of module 25 of module 24 and ink-jet of prining is same as the prior art, therefore repeats no more.
And control circuit C is in order to control the roller velocity of rotation of a plurality of roller set 22, first pickup roller 26 and the second pickup roller module 27, in this preferred embodiment, control circuit C sets the wheel speeds of the first paper feed roller set 221 in a plurality of roller set 22 greater than the second paper feed roller set 222, wherein the wheel speeds of the first paper feed roller set 221 is the speed that laser is printd, and the wheel speeds of the second paper feed roller set 222 is the speed that ink-jet is printd.
Next the operational scenario of double-side printing device 2 is described, please continues to consult Fig. 2, when the user will print first page of image and second page of image of document to paper P
*Two-sided go up the time, first pickup roller 26 begins to rotate and will be arranged in the paper P of feeding box 20
*Present the first paper feed roller set 221 that enters on first paper-feeding channel, 23, the first paper-feeding channels 23 with paper P
*Present and enter the laser district 247 that prints, in laser was printd district 247, the laser module 24 of prining printd first page of image of document in paper P
*First on, and paper P
*Deciding roller set 246 carbon dust is fixed in paper P through what laser was printd module 24
*First on.Next paper P
*Be fed to first paper output box 21, paper P by the first paper delivery roller set 223
*First face print and finish.
Then begin second page of image of document printd in paper P
*Second on, second pickup roller 271 of the second pickup roller module 27 is positioned at a primary importance and makes second pickup roller 271 and paper P
*Contact, second pickup roller 271 and paper P of rotation
*Contact is so that can paper feeding P
*, make paper P
*Pass separation friction plate 274 and presented and enter second paper-feeding channel 28, and the second paper feed roller set 222 on second paper-feeding channel 28 is with paper P by comber 272
*Present enter ink-jet print the district 253, make paper P
*Second reception from the ink of ink-jet column print head 251, then the second paper delivery roller set 224 is with paper P
*Be fed to second paper output box 29, paper P
*Second face print and finish.
Above-mentioned situation of single paper being carried out double-side printing for double-side printing device, when the user will print to large volume document (print in plurality of sheets of paper open two-sided on), plurality of sheets of paper is opened and can be carried out laser by first paper-feeding channel 23 and print, the recto image of document is printd on first that opens in plurality of sheets of paper, print finish after, these paper are fed on first paper output box 21 successively.
In ideal situation, a plurality of sheets of paper Zhang Huiyi ground is presented by second pickup roller 271 and comber 273 and is entered second paper-feeding channel 28, and the ink-jet module 25 of prining is printd the verso image of document in these paper second, print finish after, these paper are fed to second paper output box 29, and double-side printing is finished.
But the paper (i.e. first paper) of the below on being positioned at first paper output box 21 is when being fed, second paper promptly is fed on first paper by the first paper delivery roller set 223, first paper and second paper are fed simultaneously, at this moment, the separation friction plate 274 of the second pickup roller module 27 is replaced first paper and second paper and is stoped second paper to move, simultaneously, comber 272 is presented and is positioned at first paper of below,, make these paper once only be fed one and enter second paper-feeding channel 28 for these paper provide frictional force by the cooperation of comber 272 and separation friction plate 274.All the other paper many are presented in the same way enters second paper-feeding channel 28, and make the ink-jet 25 pairs of plurality of sheets of paper of module of prining carry out ink-jet with opening and print, at last, these paper are fed on second paper output box 29, and the double-side printing that plurality of sheets of paper is opened is finished.
Double-side printing device 2 can also only carry out single face and print, and the user also can select to use laser module 24 or the ink-jet module 25 of prining of prining to carry out single face and print, when using the laser module 24 of prining, the user carries out single face when prining, that only need move the second pickup roller module 27 gets paper arm 273, make second pickup roller 271 carry out moving with respect to comber 273, that is move to the second place (shown in dotted line) by primary importance, and make second pickup roller 271 not be placed on first paper output box 21 on paper contact, can carry out single face laser and print.The reason that second pickup roller 271 is moved to the second place is, the paper of prining through laser need not enter the ink-jet district that prints, that is need not enter second paper-feeding channel 28, therefore second pickup roller 271 do not need be positioned at first paper output box 21 on paper contact, more because first paper output box 21 is revealed in outside the double-side printing device 2, the paper that the user can directly laser be printd finish is by taking-up on first paper output box 21.
In addition, when using the ink-jet module 25 of prining, the user carries out single face when prining, only need guarantee that second pickup roller 271 is positioned at primary importance, and paper is positioned on first paper output box 21, make first paper output box 21 that the function of feeding box is provided, thus, paper then can be printd as carrying out ink-jet as above-mentioned.
In addition, whether double-side printing device 2 can not need be provided with gets paper arm 273, rotate and control second pickup roller 271 with control circuit C, makes double-side printing device 2 be able to normal operation thus.
From the above, double-side printing device of the present invention is printd first paper output box and the second pickup roller module is set between the module in print module and ink-jet of laser, provide a buffer area thereby can be between laser is printd and ink-jet is printd, make paper can not produce bending and fold because of the different speed of prining.And in double-side printing device of the present invention, laser module and the ink-jet module of prining of prining can be separately independently two modules, therefore, laser with the higher speed of the prining module of prining needn't be waited for the slower ink-jet module of prining, and double-side printing device of the present invention is relatively saved time and has higher efficient.
The above only is the preferred embodiments of the present invention; it is not in order to limit the present invention's scope required for protection; therefore every other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be contained in claims of the application.
Claims (9)
1. double-side printing device, in order to image is printd on one first and one second an of paper, this double-side printing device comprises:
One feeding box is in order to place this paper;
One first paper output box is in order to place this paper;
One second paper output box is in order to place this paper;
One first paper-feeding channel is between this feeding box and this first paper output box;
One first pickup roller between this feeding box and this first paper-feeding channel, enters in this first paper-feeding channel in order to this paper is presented by this feeding box;
One second paper-feeding channel is between this first paper output box and this second paper output box;
One second pickup roller module between this first paper output box and this second paper-feeding channel, enters in this second paper-feeding channel in order to this paper feeding that will be placed on this first paper output box;
A plurality of roller set are arranged on this first paper-feeding channel and this second paper-feeding channel, in order to present this paper;
The one laser module of prining is positioned on this first paper-feeding channel, in order in the district that prints at a laser image is printd on this first of this paper; And
The one ink-jet module of prining is positioned on this second paper-feeding channel, in order in the district that prints in an ink-jet image is printd on this second of this paper.
2. double-side printing device as claimed in claim 1, wherein this second pickup roller module comprises:
One second pickup roller;
One comber;
One gets the paper arm, is connected in this second pickup roller and this comber, uses so that this second pickup roller carries out moving with respect to this comber; And
One separation friction plate enters this second paper-feeding channel in order to replace this paper and to cooperate and provide frictional force to make this paper once only be fed one with this comber.
3. double-side printing device as claimed in claim 1 also comprises a control circuit, in order to control the roller velocity of rotation of described a plurality of roller set, this first pickup roller and this second pickup roller module.
4. double-side printing device as claimed in claim 1, wherein this laser module of prining comprises a laser scan unit, a photosensitive drums, cloth electricity roller, a video picture roller, a transfer rolling wheel and certain roller set.
5. double-side printing device as claimed in claim 4, wherein this is being decided roller set and is being arranged on this paper-feeding channel, and this is being decided roller set and comprises:
One heating roller is in order to provide heat energy that this laser is printd carbon dust fusion that module produced; And
One roller that bears down on one is attached on first of this paper in order to this paper pressurization is made carbon dust.
6. double-side printing device as claimed in claim 1, wherein said a plurality of roller set comprise:
One first paper feed roller set is positioned on this first paper-feeding channel;
One second paper feed roller set is positioned on this second paper-feeding channel;
One first paper delivery roller set, between this first paper-feeding channel and this first paper output box, in order to this paper feeding to this first paper output box; And
One second paper delivery roller set, between this second paper-feeding channel and this second paper output box, in order to this paper feeding to this second paper output box.
7. double-side printing device as claimed in claim 6, wherein this first paper feed roller set has one first paper feed speed, and this second paper feed roller set has than the slow-footed one second paper feed speed of this first paper feed.
8. double-side printing device as claimed in claim 1, wherein this ink-jet module of prining comprises:
One ink-jet column print head makes this ink be attached on this second of this paper in order to the ejection ink; And
One transmission mechanism is connected in this ink-jet column print head, in order to move this ink-jet column print head.
9. double-side printing device as claimed in claim 8, wherein this ink-jet column print head is positioned at the top of this paper-feeding channel, and the ink that this ink-jet column print head is produced is sprayed on this paper from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910008317A CN101811399A (en) | 2009-02-20 | 2009-02-20 | Double-side printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910008317A CN101811399A (en) | 2009-02-20 | 2009-02-20 | Double-side printing device |
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|---|---|
| CN101811399A true CN101811399A (en) | 2010-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910008317A Pending CN101811399A (en) | 2009-02-20 | 2009-02-20 | Double-side printing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103287140A (en) * | 2012-02-29 | 2013-09-11 | 富士施乐株式会社 | Printing method, box manufacturing method and printing apparatus |
| CN105346258A (en) * | 2015-12-11 | 2016-02-24 | 大连中盈科技股份有限公司 | Multifunctional small office platform |
| CN105365399A (en) * | 2015-12-11 | 2016-03-02 | 大连中盈科技股份有限公司 | Printer with composite functions |
| CN109986891A (en) * | 2019-03-08 | 2019-07-09 | 武汉绎方信息工程有限公司 | A kind of duplex inkjet print system |
| CN111265679A (en) * | 2020-03-16 | 2020-06-12 | 王瑞婷 | Sterilizer for department of infectious diseases |
| CN113934119A (en) * | 2021-10-26 | 2022-01-14 | 成都工业学院 | Fold evaluation method of printing paper |
-
2009
- 2009-02-20 CN CN200910008317A patent/CN101811399A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103287140A (en) * | 2012-02-29 | 2013-09-11 | 富士施乐株式会社 | Printing method, box manufacturing method and printing apparatus |
| CN105346258A (en) * | 2015-12-11 | 2016-02-24 | 大连中盈科技股份有限公司 | Multifunctional small office platform |
| CN105365399A (en) * | 2015-12-11 | 2016-03-02 | 大连中盈科技股份有限公司 | Printer with composite functions |
| CN109986891A (en) * | 2019-03-08 | 2019-07-09 | 武汉绎方信息工程有限公司 | A kind of duplex inkjet print system |
| CN111265679A (en) * | 2020-03-16 | 2020-06-12 | 王瑞婷 | Sterilizer for department of infectious diseases |
| CN113934119A (en) * | 2021-10-26 | 2022-01-14 | 成都工业学院 | Fold evaluation method of printing paper |
| CN113934119B (en) * | 2021-10-26 | 2023-08-04 | 成都工业学院 | Fold evaluation method for printing paper |
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