Innovation KYOCERA (Part 1)
We have long wanted to write about the new features and design solutions that we used in the new MFP series. And so we did it!
The text turned out a bit much, of course, but the topic is fully disclosed.
Thin coated drum
In the new full-color MFPs, photo-drums with a reduced photoreceptor layer thickness are used to improve the accuracy of image elements reproduction. To reduce the thickness of the photoreceptor layer did not affect the life of the device, the developers of KYOCERA added an insulating layer to the photoreceptor.
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The result is clearer and higher-quality images compared to images obtained on the apparatus of the previous series. Compare the illustrations from left to right: the original, the apparatus of the previous series, the apparatus of the new series .
New fine toner and magnetic media
The new KYOCERA models use new fine toner and magnetic media (developer), whose particles have a smaller diameter. Thus, the diameter of the particles of the new toner is 28% smaller compared with the particles of the toner used in the apparatus of the previous series. In addition, the use of new technology for the production of toner allows to obtain particles in shape more close to optimal.
Previous series
The average particle diameter of 9.5 microns
New series
The average particle diameter of 6.8 microns
Compared with the previous models of full-color MFPs, not only the average diameter of the toner particles, but also toner consumption was reduced, which made it possible to increase the clarity of text and lines.
Also, thanks to the new toner, full-color MFPs of the new series have a wider coverage of the color space or, in other words, a wider range of reproducible shades of colors compared to previous models.
Technologies and materials used for the production of new toner allowed to achieve a lower melting temperature compared to previous toners, which led to a decrease in energy consumption by full-color MFPs during operation by 15%, and the operating temperature of the fuser by 200C.
Improved latent image development scheme
Improving the quality of the resulting image in full-color MFPs also contributes to the new scheme of applying the bias voltage to the development area of ​​the latent image (the so-called “double bias”). Since KYOCERA’s modern full-color MFPs use a hybrid or one-and-a-half latent image development system, the bias voltage is applied to both the magnetic shaft and the development shaft.
But unlike previous models of full-color MFPs, the devices of the new series offer the possibility of precise and independent control of each of these bias voltages. This ensures the constancy and continuity of a thin layer of toner on the shafts of the development units, which helps to prevent the occurrence of such a common image defect as a phantom image, the occurrence of which is particularly well discernible in the so-called “highlights” or light semitones.
Also, to maintain the high quality of the latent image development when performing large volumes of copying or printing, the surface of the development rollers is covered with a thin layer of silicone polyurethane.
This solution does not allow the fine low-melting toner to recharge and adhere to the surface of the development shaft, as is the case in some high-speed models from other manufacturers.
In the new series of full-color MFPs, changes were also made to the toner supply algorithm in the development system. For each segment of the development unit, the fill factor of the image area is calculated in real time using the original algorithm developed by KYOCERA. This value allows the MFP to determine the optimal time and duration for each toner feed. The result is a more stable reproduction of the image. At the same time, the density of spot fills and high-density images, as well as areas with low density, is automatically maintained in acceptable ranges.
The text turned out a bit much, of course, but the topic is fully disclosed.
Thin coated drum
In the new full-color MFPs, photo-drums with a reduced photoreceptor layer thickness are used to improve the accuracy of image elements reproduction. To reduce the thickness of the photoreceptor layer did not affect the life of the device, the developers of KYOCERA added an insulating layer to the photoreceptor.
')
The result is clearer and higher-quality images compared to images obtained on the apparatus of the previous series. Compare the illustrations from left to right: the original, the apparatus of the previous series, the apparatus of the new series .
New fine toner and magnetic media
The new KYOCERA models use new fine toner and magnetic media (developer), whose particles have a smaller diameter. Thus, the diameter of the particles of the new toner is 28% smaller compared with the particles of the toner used in the apparatus of the previous series. In addition, the use of new technology for the production of toner allows to obtain particles in shape more close to optimal.
Previous series
The average particle diameter of 9.5 microns
New series
The average particle diameter of 6.8 microns
Compared with the previous models of full-color MFPs, not only the average diameter of the toner particles, but also toner consumption was reduced, which made it possible to increase the clarity of text and lines.
Also, thanks to the new toner, full-color MFPs of the new series have a wider coverage of the color space or, in other words, a wider range of reproducible shades of colors compared to previous models.
Technologies and materials used for the production of new toner allowed to achieve a lower melting temperature compared to previous toners, which led to a decrease in energy consumption by full-color MFPs during operation by 15%, and the operating temperature of the fuser by 200C.
Improved latent image development scheme
Improving the quality of the resulting image in full-color MFPs also contributes to the new scheme of applying the bias voltage to the development area of ​​the latent image (the so-called “double bias”). Since KYOCERA’s modern full-color MFPs use a hybrid or one-and-a-half latent image development system, the bias voltage is applied to both the magnetic shaft and the development shaft.
But unlike previous models of full-color MFPs, the devices of the new series offer the possibility of precise and independent control of each of these bias voltages. This ensures the constancy and continuity of a thin layer of toner on the shafts of the development units, which helps to prevent the occurrence of such a common image defect as a phantom image, the occurrence of which is particularly well discernible in the so-called “highlights” or light semitones.
Also, to maintain the high quality of the latent image development when performing large volumes of copying or printing, the surface of the development rollers is covered with a thin layer of silicone polyurethane.
This solution does not allow the fine low-melting toner to recharge and adhere to the surface of the development shaft, as is the case in some high-speed models from other manufacturers.
In the new series of full-color MFPs, changes were also made to the toner supply algorithm in the development system. For each segment of the development unit, the fill factor of the image area is calculated in real time using the original algorithm developed by KYOCERA. This value allows the MFP to determine the optimal time and duration for each toner feed. The result is a more stable reproduction of the image. At the same time, the density of spot fills and high-density images, as well as areas with low density, is automatically maintained in acceptable ranges.
Source: https://habr.com/ru/post/146609/
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