CN1145853C - Multiple colour figure forming device - Google Patents
Multiple colour figure forming device Download PDFInfo
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- CN1145853C CN1145853C CNB981204864A CN98120486A CN1145853C CN 1145853 C CN1145853 C CN 1145853C CN B981204864 A CNB981204864 A CN B981204864A CN 98120486 A CN98120486 A CN 98120486A CN 1145853 C CN1145853 C CN 1145853C
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Abstract
The present invention relates to a multi-colour image forming device which prevents an image from being written in the action process of a rotary developing device and avoids generating a band-shaped stripe. In order to form two pages of colour adjusting images on a copying band, a plurality of images are written in by a first image interval. After the images are written in, the developing device rotates at a second image interval for preparing the next adjusted colour. The second image interval is larger than the first image interval, and comprises developing finishing time for writing in the images, the rotary time of the developing device, and the convergence time of vibration generated along with the rotation.
Description
Technical field
The present invention relates to multicolor image and form device, can prevent that particularly the action vibration because of developer from producing the multicolor image formation device of bar image defective.
Background technology
Multicolor image forms in the device, Y (Huang), M (dark red), C (dark blue), K (deceiving) toner image of all kinds are formed on first image-carrier, these toner images of all kinds are once duplicated on second image-carrier, toner image of all kinds is overlapping, form the masstone color image.The toner image secondary of this polychrome is duplicated on the print media of paper, plastic sheeting etc., obtain required multicolor image.Above-mentioned monotone color image obtains like this: the laser radiation of modulating according to view data to first image-carrier, is formed electrostatic latent image, make this latent electrostatic image developing with each developer of all kinds.Developer is provided with each look, make each developer successively with first image-carrier in opposite directions, develop.As an example of developing apparatus, rotary type developing device is known.
In the rotary type developing device, developer equivalent arrangements of all kinds on the circumference of whirligig, is coincide itself and development time of all kinds, revolve at every turn with turning 90 degrees and locate, develop.During development, the developer roll that will be attached with toner image with predetermined space is relative with first image-carrier, in order to keep this interval rightly, in the known device, promptly keep the interval maintaining body that is located on the developer roll surface of the roller and first image-carrier to join at interval.
In addition, also considered such device, that is, do not make at interval to keep the roller and first image-carrier to join, but make other parts of correctly having regulated with first image-carrier position relation keep roller to join with the interval, with the interval maintenance adequate value of the developer roll and first image-carrier.As an example of image processing system, comprise the prior art of rotary type developing device, disclose No. 188829/1993 communique by Jap.P. and disclose.
There is following problem in above-mentioned conventional images building mortion.At first, make to keep at interval in the device that the roller and first image-carrier directly join, when making the developer roll positioning of rotating, impact shock passes to first image-carrier.When developer roll is positioned, carry out laser radiation in order to form next image, above-mentioned impact makes the position changing of the relative positions of electrostatic latent image, produces banded striped etc., makes the picture quality variation.
Make in the device that at interval keeps roller not join and join with other parts, can avoid above-mentioned impact to pass on first image-carrier with first image-carrier.But, owing to be indirect localization method, so, be not easy the interval between the developer roll and first image-carrier is kept accurately.That is,, except increasing this problem of component number,, also exist the many problems of assembly working amount in order correctly to regulate the position relation of other parts and first image-carrier owing to be provided with other parts.
Summary of the invention
The present invention makes in view of the above problems, and its purpose is to provide a kind of multicolor image to form device, and according to this device, even will keep the roller and first image-carrier directly to join at interval, the impact in the time of also can not locating because of developer roll makes the image variation.
To achieve these goals, multicolor image of the present invention forms device, the monotone color image that is formed on first image-carrier is one by one overlapped on second image-carrier, form the masstone color image, again this masstone color image is duplicated on the print media, it is characterized in that, have exposure device, developing apparatus, developer mobile device and write treating apparatus;
Above-mentioned exposure device writes above-mentioned first image-carrier to the image according to view data;
Above-mentioned developing apparatus has several developers at each look of developing color, with the image developing that is written on above-mentioned first image-carrier;
Above-mentioned developer mobile device is from above-mentioned several developers, and the developer of the look that use the next one moves to developing location;
The above-mentioned treating apparatus that writes, on above-mentioned first image-carrier continuously and be divided into some pages of ground and form whole-colored toner images, have the pattern that some pages image is write repeatedly; The image corresponding with the toning look of going ahead of the rest write end after, the mobile required schedule time T3 that finishes developer at above-mentioned developer mobile device through after, begin to write by above-mentioned exposure device with the next look corresponding image of mixing colours;
Writing repeatedly when finishing of above-mentioned image, output writes end signal;
Above-mentioned developer mobile device is replied the above-mentioned end signal that writes, and after above-mentioned time T 4 warps, developer is moved.
According to feature of the present invention, in the moving of developer, exposure device does not write image.
Description of drawings
Fig. 1 is the time diagram of the image processing system action of expression one embodiment of the invention.
Fig. 2 is the sectional view of image processing system.
Fig. 3 is the arrangement plan of the toner image on the copying band.
Fig. 4 is the arrangement plan of the toner image on the copying band in the variation.
Fig. 5 is the time diagram of the image processing system action of expression variation.
Fig. 6 is the block diagram of wanting portion's function that presentation video forms the control device of device.
Fig. 7 is the process flow diagram of image write activity.
Fig. 8 is the process flow diagram of developing apparatus spinning movement.
Embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.Fig. 2 is the sectional view that color image forms device more than expression one embodiment of the invention.Among Fig. 2, around tubular photoreceptor 1, disposing the parts that charged device 2, the laser scanner 3 as exposure device, developing apparatus 4 and clearer 23 etc. are used to form the electronic photo image.Photoreceptor 1 is by charged device 2 uniform chargeds, and the laser of modulating according to view data is shone by laser scanner 3, forms electrostatic latent image on this photoreceptor 1.The electrostatic latent image that forms is by the toner development of developing apparatus 4 with predetermined color.
Developing apparatus 4 has Y, M, C, K developer 4Y, 4M, 4C, 4K of all kinds, when development of all kinds finishes, towards the rotation of arrow R direction, according to the order of Y, M, C, K, forms toner image with motor (scheming not shown) on photoreceptor 1.The rotation of said motor passes to developing apparatus 4 by electromagnetic clutch (figure does not show).When starting said motor, cut off this electromagnetic clutch, become rotatablely, when closing said motor, connect this electromagnetic clutch, the rotation of restriction developing apparatus 4.
Sometimes be that toner image of all kinds respectively forms one,, form several whole-colored toner images continuously sometimes according to picture size.For example, in the time of forming two pages of whole-colored toner images, after two pages developing operation, developing apparatus 4 is rotated, and carries out the development of another look.On each developer 4Y, 4M, 4C, 4K, be provided with toner agitating roller, transport (all not shown) such as roller, developer rolls.Wherein, developer roll has the interval and keeps roller (the interval maintaining body that this keeps roller conduct and photoreceptor 1 to join at interval) on it is coaxial, keep roller to keep certain intervals between developer roll and the photoreceptor 1 at interval by this.At interval keeping roller is annular element, and the big above-mentioned interval of its radius ratio developer roll is rotatably installed in the two ends of developer roll.
With photoreceptor 1 in abutting connection with disposing middle copying device 12, this middle copying device 12 is made of several rollers 6,7,8,9,10 and the copying band 11 as the middle copying body of setting up these rollers.One time photocopying roll 7 is pushed on the photoreceptor 1 by copying band 11, makes copying band 11 charged with toner reversed polarity ground, and the toner image on the photoreceptor 1 is once duplicated on this copying band 11.
Roller 9 is being held copying band 11 ground under the arm with secondary photocopying roll 5 and is being disposed in opposite directions, the toner image on the copying band 11 is duplicated to be sent between this secondary photocopying roll 5 and the roller 9 be on the recording chart of secondary duplicating position.Recording chart is housed in the paper feeding cassette 13,14 with stacked state, is extracted out by paper feed roller 15,16 successively from the paper of topmost.
The recording chart of extracting out from sheet feed stacker 13,14, by disposing a pair of Elastic supporting roller (レ ジ ロ-Le) 17, a pair of Elastic supporting roller in advance (プ レ レ ジ ロ-Le) 18 and a pair of transport roller 19 transport road (among the figure shown in the dotted line), deliver to secondary and duplicate the position.Duplicate the position at secondary, the toner image on the copying band 11 is duplicated on the recording chart by secondary photocopying roll 5.Duplicate toner image on the recording chart by the 20 heating fixation of a pair of fixation roller after, be discharged to the discharge dish 22 of discharge dish 21 or top.Discharge dish 22 is that the image of recording chart duplicates the what is called of discharging that faces down and faces lower wall, and discharge dish 21 is that image duplicates the supine what is called dish that faces up.Face lower wall or the selection of the dish that faces up, determine by being located at a pair of fixation roller 20 dirty switchings of switching with gate (figure does not show) on the road of transporting.
Below, illustrate that the image in the above-mentioned image processing system forms action.Explanation earlier forms the situation of two pages of toner images simultaneously on above-mentioned copying band 11.Fig. 3 is formed in the arrangement plan of the toner image on the copying band 11, and expression is with the toner image of two circulation duplicating on copying band 11.Among this figure, toner image P1, P2 are the images of so-called letter paper specification, and its minor face is consistent with the rotation direction (A direction) of copying band 11.Toner image P1, P2 are the whole-colored toner images that duplicates in a circulation.
For example, in first circulation, toner image P1, the P2 of Y look are copied earlier, follow in second circulation toner image of overlapping M look on the toner image of this Y look.Similarly, in the 3rd circulation, the toner image of C look is copied, and in the 4th circulation, the toner image of K look is copied.When the K look duplicated end, the toner image of this polychrome was duplicated on recording chart by secondary.
Interval I1 between two toner image P1, the P2 is the distance corresponding with time T 2, for example is 15.8mm, and to be recording charts be transported to secondary from the position of above-mentioned a pair of Elastic supporting roller 17 to this time T 2 duplicates the required bottom line time of position.In addition, after toner image P2 is copied,, be the distance corresponding with time T 3 to the interval I2 between the toner image P1 that begins to duplicate next look once more, this time T 3 is that developing apparatus 4 rotates in order to switch toner and locatees the required time.I2 for example is 80.2mm greater than above-mentioned interval I1 at interval.The picture size of the rotation direction with 11 is 215.9mm in the letter paper specification.
Below, the key diagram picture forms the timing of usefulness.Fig. 1 is an action time figure, and expression page sync signal, developing apparatus are used the actuation time of motor drive signal and electromagnetic clutch drive signal.Among this figure, the page sync signal P.SYNC that is used for being write by laser scanner 3 connects at time t1, t3, and the image that carries out first and second pages writes.At time t2, t4, page sync signal P.SYNC cuts off, and first and second pages image writes end.The time T 1 that page sync signal P.SYNC is connecting is 3055 milliseconds (are equivalent to displacement 215.9mm) in the letter paper specification.The time T 2 that page sync signal P.SYNC is cutting off is and above-mentioned interval I1 time corresponding, for example is 224 milliseconds.
Write the time T 3 of start time t5 from time t4 to first page of image once more, corresponding with above-mentioned interval I2, for example be 1135 milliseconds.This time T 3 is according to following setting.At first, time t4 image write end after, finish to this image developing, need time T 4.This time T 4 is corresponding to the distance of this image developing position with the image writing position from laser scanner 3 on photoreceptor 1.After having passed through time T 4, connect the developing apparatus motor drive signal, cut off electromagnetic clutch, display 4 is revolved turn 90 degrees at time t6.That is, at time t6, the image developing of going ahead of the rest finishes, so, make the developer rotation of the toner image of next look, move to developing location.At time t7, when the rotation of developing apparatus 4 finishes, cut off the developing apparatus motor drive signal, connect electromagnetic clutch, fixedly developing apparatus 4, and finish the location.The positioning of rotating of this developing apparatus needs time T 5.In addition, after developing apparatus 4 rotations and electromagnetic clutch cut off, follow these actions to produce vibration, this vibration damping (vibration convergence) needs time T 6.
Below, illustrate that the image of the 17 inch specifications bigger than letter paper specification forms example.Fig. 4 is the arrangement plan of the toner image on the copying band 11, two recurrent states of expression copying band 11.Among this figure, image P3 is the image of 17 inches specifications, and its long limit is consistent with the moving direction (M direction) of copying band 11.At this moment, on copying band 11, only there is the toner image of one page in the same time.After duplicating on the copying band 11 from the toner image of image P3, to the interval I2 of the duplicating of the toner image that image P3 is begun once more next look, being identical value with the foregoing description, for example is 80.2mm.
Fig. 5 is the time diagram that 17 inches specification images form action, represents the same or equal time with mark identical among Fig. 1.In this example, owing on each page or leaf, form toner image, so, at time t1, connect page sync signal P.SYNC, cut off, when the image of one page writes end at time t2, during before the elapsed time T3, connect page sync signal P.SYNC, carry out the rotation and the location of developing apparatus 4.At time t5, connect page sync signal P.SYNC once more, carry out image and write, so that to forming not homochromy next toner image with one page.
Below, the processing that the key diagram picture forms.What Fig. 6 was a Flame Image Process with control device wants portion's functional block diagram.Control device can be made of the microcomputer with CPU, RAM, ROM etc.Among this figure, size judging part 24 is judged by the printed size of images of image processing system according to printing indicator signal.Printing indicator signal can be imported with input medias such as keyboards by the operator, also can be from upper machine by inputs such as communication interfaces.This printing indicator signal is made of additional informations such as the view data of presentation video content and dimension informations, retrieves this additional information and can judge picture size.When printing indicator signal and be input to size judging part 24, also be input to timing value storage part 25.In the timing value storage part 25, storing the actuation time of developing apparatus 4 and the data of the time T 3 that calculates according to size of photoreceptor 1 etc., replying the printing indicator signal, the data of this time T 3 are being input to timing setting portion 26.
At timing value calculating part 29, accommodating the data of above-mentioned time T 1, T2, after the size input of judging by size judging part 24, calculate the data with this size time corresponding T1, T2, be input to timing setting portion 26 respectively.This timing value calculating part 29 can be by the table of dimension information as address, output time T1, T2 constituted.For example, during letter paper specification image, output time T1, T2 when 17 inches specification images, only form one page image owing to handling with a round-robin respectively, so, do not want time T 2, not output time T2.
Below, form action with reference to the above-mentioned image of flowchart text.Following processing is by the MICROCOMPUTER PROCESSING with CPU, RAM, ROM etc.Fig. 7 is the process flow diagram that image writes.Among this figure,, read in picture size as printing object at step S1.Picture size can be judged according to the additional information of the view data of importing.Picture size is detected when making original copy or when reading original copy, is attached in the view data.
At step S2,, set the continuous duplicating of whole-colored toner image and count N and time T 1, setting-up time T2, T3 again according to picture size.Duplicating number N continuously for example is " 2 " in the letter paper specification, is " 1 " in 17 inches specifications.Time T 1 for example behind the corresponding form of picture size and time T 1 that is prepared in advance, is obtained with reference to this form.Time T 2, T3 are set in advance among ROM etc. as fixed data, it is read into the perform region set.At step S3, the counter n zero setting that the toner image that duplicates on copying band 11 is counted.
At step S4, the Y color image data bit sign relevant with first page is deployed in RAM etc.At step S5, the view data of this Y look is supplied with laser scanner 3, the beginning laser explosure.Meanwhile, to first timer setting-up time T1 and starting.At step S6, judge whether the time T 1 of first timer is used up, if certainly, enter step S7, stop laser explosure.At step S8, will count n and increase progressively (+1).At step S9, judge whether counting n equals to duplicate continuously number N.In 17 inches image, this judgement is being for the first time certainly.Fixed if the judgment is No at step S9, then enter step S10, to second timer setting-up time T2 and starting.At step S11, judge whether the time T 2 of second timer is used up, if certainly, then enter step S4, this step S4 is used to form following one page image of same toning.
If the judgement at step S9 is certainly, then enter step S12, output image forms end signal.This image forms the benchmark that signal begins as the rotation of aftermentioned developing apparatus 4.At step S13, to the 3rd timer setting-up time T3 and starting.At step S14, judge whether the time T 3 of the 3rd timer is used up, if certainly, then enter step S15, with counter n zero setting.At step S16, the M color image data bit sign relevant with first page is deployed in RAM etc.Below, carry out the processing same with step S4～S13, carry out reading in of M color image data.Similarly carry out the reading in of view data of C look and K look, after the end, judge at step S17 to have or not one page down.If following one page is arranged, enter step S4, if there is not one page down, then finish whole processing.
Below, the spinning movement of developing apparatus 4 is described.In the process flow diagram of Fig. 8,, time T 4, T5 are read into the perform region from ROM at step S20.At step S21, judge to have or not above-mentioned image to form end signal, if certainly, then enter step S22.At step S22, to the 4th timer setting-up time T4 and starting.At step S23, judge whether the time T 4 of the 4th timer is used up, if certainly, then enter step S24.Motor drive signal at step S24 connection developing apparatus 4 cuts off the drive signal of electromagnetic clutch 30.At step S25, to the 5th timer setting-up time T5 and starting.At step S26, judge whether the time T 5 of the 5th timer is used up, if certainly then enter step S27.At step S27, cut off the drive signal of developing apparatus 4, connect the drive signal of electromagnetic clutch 31, finish the processing of this flow process.
In the present embodiment, be to be described as exposure device, but be not limited thereto, for example also can use the LED exposure device with laser scanner.That is, LED head array and photoreceptor are disposed in opposite directions, make the bright lamp of this LED head array according to image information.
As mentioned above, among the present invention, to prepare in order developing and to make in the course of action that developer moves, exposure device does not carry out image and writes.Therefore, can prevent from write activity to be produced harmful effect, can prevent to produce ribbon grain because of the vibration that is produced of moving of developer.
Claims (5)
1. multicolor image forms device, several monotone color images that are formed on first image-carrier are overlapped on second image-carrier, form the masstone color image, again this masstone color image is duplicated on the print media, it is characterized in that, have exposure device, developing apparatus, developer mobile device and write treating apparatus;
Above-mentioned exposure device (3) writes above-mentioned first image-carrier to the image according to view data;
Above-mentioned developing apparatus (4) have several developers at each developing color look (4Y, 4M, 4C, 4K), with the image developing that is written on above-mentioned first image-carrier;
Above-mentioned developer mobile device is from above-mentioned several developers, and the developer of the look that use the next one moves to developing location;
The above-mentioned treating apparatus that writes, on above-mentioned first image-carrier continuously and be divided into some pages of ground and form whole-colored toner images, have the pattern that some pages image is write repeatedly; The image corresponding with the toning look of going ahead of the rest write end after, the mobile required schedule time T3 that finishes developer at above-mentioned developer mobile device through after, write with the next look corresponding image of mixing colours by above-mentioned exposure device (3) beginning;
Writing repeatedly when finishing of above-mentioned image, output writes end signal;
Above-mentioned developer mobile device is replied the above-mentioned end signal that writes, and after above-mentioned time T 4 warps, developer is moved.
2. multicolor image as claimed in claim 1 forms device, it is characterized in that, above-mentioned time T 3, comprise time T 4, time T 5 and time T 6, time T 4 is to finish to the time of the development end of this image from writing of the image corresponding with the toning look of going ahead of the rest, time T 5 is that above-mentioned developer moves the required time, and time T 6 is after above-mentioned developer mobile device is stopped, and arrives the vibration convergent time of the mobile generation of this developer.
3. multicolor image as claimed in claim 1 or 2 forms device, it is characterized in that, when writing above-mentioned some pages image repeatedly, the time set between each page must be than above-mentioned time T 3 weak points.
4. multicolor image as claimed in claim 1 or 2 forms device, it is characterized in that, above-mentioned several developers (4Y, 4M, 4C 4K) is configured on the same radius of rotation center, simultaneously, it is axle that above-mentioned developer mobile device comprises with above-mentioned rotation center, makes the drive unit of developer rotation predetermined angular.
5. multicolor image as claimed in claim 1 or 2 forms device, it is characterized in that above-mentioned developer has developer roll, and comprises the interval maintaining body that makes this developer roll and first image carrier surface keep certain intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981204864A CN1145853C (en) | 1998-10-26 | 1998-10-26 | Multiple colour figure forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981204864A CN1145853C (en) | 1998-10-26 | 1998-10-26 | Multiple colour figure forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1252537A CN1252537A (en) | 2000-05-10 |
| CN1145853C true CN1145853C (en) | 2004-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981204864A Expired - Fee Related CN1145853C (en) | 1998-10-26 | 1998-10-26 | Multiple colour figure forming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1145853C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4289851B2 (en) * | 2001-11-14 | 2009-07-01 | キヤノン株式会社 | Image forming apparatus |
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1998
- 1998-10-26 CN CNB981204864A patent/CN1145853C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1252537A (en) | 2000-05-10 |
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Granted publication date: 20040414 Termination date: 20171026 |