Optical Imaging Digital Printing Machine NexPress
The NexPress 2000, 2100 Digital Press, developed in collaboration with Heidelberg (Kodak) and Kodak (Kodak), is similar to most laser printers and uses photoconductor drum imaging technology, but it uses liquid crystal arrays instead of laser imaging, dry The toner is transferred to the paper by the blanket cylinder. This is reminiscent of Lndigo's E-print, but lndigo uses a blanket cylinder for all colors, while NexPress is a cylinder pair of colors. The original NexPress model had 4 sets of printing units, while the 2100 had an empty space where the 5th printing unit could be installed. NexPress has a print speed of 70 pages per minute (A4 single sided) and 35 pages per minute for double sided printing because printing double sided passes twice through the printing unit. NexPress is designed for a two-shift, one-month, one-month print job and can load toner and paper during the printing process.
The liquid crystal imaging head can achieve 600 dpi resolution, using 8 bits of gray per pixel to improve color reproduction (if necessary, the imaging head can do 12 bits of gray per pixel). The main paper path is linear, suitable for one-sided printing of hard paper, and the paper is carried by a belt with static electricity. In duplex printing, the paper is returned to the printing unit after one cycle, and during the cycle, the paper is flipped along its axis of motion and continues to be carried by the conveyor a second time through the printing unit. The entire cycle can accommodate 18 sheets of paper at a time, so when the two-sided printing is finished, when the 18 pages are printed on the first side and the second side is printed, the blank paper feed is stopped. The toner is heated and melted outside the printing press. The melting process Heidelberg Company will not talk about it. This may involve some patents. The NexPress 2100 also provides a front end for NexPress that supports variable data printing at full engine speeds.
Before the Drupa exhibition, Deutscher Drucker magazine printed 16,000 inserts with NexPress and worked in very hot weather. In general, photocopiers belong to office equipment, and presses are entirely production and processing equipment. The category to which a digital press belongs is not yet clear, but NexPress is clearly positioned as a production and processing device.
The NexPress 2100 became a commodity at the beginning of 2001 and the price was within 350,000 US dollars. The cost per page has not yet been estimated, but it is said to be very competitive.
Futurecolor competing with NexPress
Xerox (Xerox) has launched the DocuColor 2000 series before the Drupa exhibition. It is understood that it is developing another high quality new digital printing machine, Futurecolor, which will be launched in about 1 to 1.5 years. Currently, it only knows that it is applicable to 1 million per month. Page impression users, from this indicator, are similar to the NexPress 2100.
The fastest inkjet digital printer, Scitex Digital Printing, displayed its VersaMark Business Color Press (VersaMark Commercial Color Press) on Drupa 2000, which is regarded as an unexpected strong product of Drupa 2000.
VersaMark is a fast, 300 dpi inkjet digital press. If fully equipped, it can print (20in roller) double sided 500 feet per minute, that is, can print about 8180 pages per minute, double sided, and full color pages. Or 36 LIPS. Its price is approximately US$1.2 million (single open sixteen) to US$5 million (two-sided eight open). The inkjet print heads used by VersaMark are the same as the inkjet print heads on Scitex's 1999 monochrome book press. They are all 9in inkjet heads. Scitex is testing machines that print 800 to 1,000 feet per minute.
The inkjet head technology is the patent of Scitex Digital. Scitex Digital has begun to equip the presses developed for other companies with its inkjet heads, one of which is an agreement with Matti Technology of Switzerland, which uses Scitex inkjet printheads.
Compared to sheet-fed offset printing, VersaMark's output looks relatively rough, the colors are slightly darker, and there are some punishing bars on the page, but its quality is comparable to that of rotary printing products. The conclusion is that the print quality of VersaMark Business Color Press is suitable for a variety of medium and low grade print jobs. If work determines that this high speed of VersaMark is required, VersaMark is a wrong choice in the current color digital printing market.
Electrocoagulation imaging of Elco 400
The prototype that Elcorsy Company introduced on IPEX 98 is called "elcographic", it can compare with offset printing machine in speed, quality and cost per page. Drupa 2000 was the second time it faced the public and caused great interest from visitors.
The model displayed on the Drupa 2000 was the Elco 400, which prints 400 feet per minute (twice the speed at IPEX 98). The resolution has also been increased to 400 dpi. The 18-inch roller prints 1745 letter-size color pages (29 LIPS) per minute in a double-sided configuration. The working principle is that there is a thin layer of special ink on the surface of the metal drum. When the drum rotates through an electrode array, if the electrode is turned on, current flows through the ink, causing the ink to “condense†on the drum surface. The squeegee scrapes the non-agglomerated ink and then the image is transferred to the paper roll. It should be said that the Elco 400 should still be a prototype, configured for printing small print files. New prints can be loaded during the previous print run. The cost of printing a full-color letter size image is about 1 cent. Elcorsy will provide a commercial version of the machine in 2001, starting at approximately $1 million.
Quality Improvement Drupa 2000 exhibited machines that showed substantial progress since the IPEX exhibition in 20 months. The machine does not look like a conceptual printer in a laboratory, but rather a commercial product. Due to the 400 dpi resolution, sharp text can be produced even for small characters. In the case of halftone, generally only 400 dpi machines are rough, but due to the inherent gray scale capability of elcography, it is no longer a problem.
Although there are problems in the existing problems, from the perspective of printing proofs, there are obviously some problems that need to be solved:
(1) There is a white stripe along the direction of paper feed. These streaks collect dust or debris on the imaging head, causing imaging failure. Elcorsy believes that configuring an electrode cleaning system will solve this problem and plan to do so.
(2) There are still some odd black patches on some images. Elcorsy thinks this is due to software glitches and is ready to be repaired.
(3) The pressure of the ink squeegee must be fairly stable. If the pressure is not high enough, some of the ink that would have been scraped off will be left on the drum, which is the reason for the gray pattern of spots that are created in the bright areas. If the pressure is too high, the small dots of condensed ink are also removed by the squeegee. This is the reason for the loss of highlights. These problems indicate that the existing squeegee system cannot meet the requirements. Elcorsy is making every effort to improve. According to the improved working mode, most of the un-agglomerated ink will be removed before the squeegee is performed. Then, using the very light squeegee pressure to remove the remaining ink, does not affect the small dots (for text-only prints, the squeegee pressure problem is not so important, the pressure can be greater).
Can't Print Three Primary Colors The models that were exhibited on Drupa 2000 are running in double-sided, mono mode, and it is not yet possible to evaluate the quality of their three-primary printing.
Elcorsy plans to release merchandise printing presses within 1 year and will start focusing on monochrome and spot color printing, such as books, documents and label printing, as well as short-run newspaper printing and wallpaper printing. Elcorsy plans to subsequently introduce three primary colors.
The innovative sheet-fed press Xeikon plans to market its new sheet-fed digital press, the CSP 320D, which has a speed of 32 pages per minute (0.5 LIPS). It uses some parts of the DCP series web. Plus some new technological innovations.
Vertical and horizontal paper feeding problems A feature of the web DCP series printer engine is the vertical toner mechanism, which has eight such toner mechanisms (four on each side of the paper roll) to ensure that High-speed, accurate positioning with two-sided printing. The vertical design of the DCP series presses uses the same mechanism on both sides of the paper roll (good for design and maintenance), but it requires a vertical paper path in the toner-related work stage, in the web machine This is not a problem, but it is not desirable for sheet-fed machines. Sheet-fed printers prefer short and straight paper paths and therefore prefer horizontal paper paths.
The toner of the CSP 320D is not transferred directly to paper like other Xeikon printers. It uses the OPC tape as a toner-carrying mechanism and combines its vertical direction of toner handling with a short, horizontal paper path. There are two OPC tapes on the CSP 320D (respectively, for the upper and lower surfaces of the paper), which are charged at the laser imaging mechanism, and then collect the toner when moving vertically, and then through a series of rollers, when the paper moves horizontally, Toner is transferred to paper. The roller feeds four toner-carrying areas on each OPC belt (corresponding to four-color images of yellow, blue, green, and black) through a zigzag route. In this way, the 8-color toner-carrying area on the two OPC tapes is applied to the paper almost at the same time.
The CSP 320D uses an OPC with toner carrying system to achieve a very short paper path (perhaps the shortest one seen in a double sided press). The shorter the paper path, the less chance of paper jamming, and the difficulty of locating problems. As the first model, the paper path of the CSP 320D has a curve, and Xeikon is planning to implement a true “through-pass†form to facilitate double-sided printing of hard materials.
Other new technologies Due to the failure to get a suitable LED array, the CSP 320D uses laser imaging head technology (DCP series printers use LED arrays). Another new technology used on the CSP 320D is the hot-roller fushing system. Since both sides of the paper are printed at the same time, the CSP 320D only needs to melt through the toner at a time, which avoids the difficulties of accurate positioning of other double-sided printing presses. Before the other side of the paper is printed on the second side of the paper, the first side has been printed, and heat and pressure during processing may cause the paper to stretch.
Seven-color digital presses with seven imaging drums On Drupa 2000, Oce once again demonstrated its presses using seven-color toner (CMYK plus RGB). The machine is called Color Copy Press. The format has been on display for several years and its commercial model was introduced in 2001.
Its main technical feature is that there are seven imaging drums (one for each color toner). Unlike the photoreceptor drums on laser printers, it works on the electrostatic principle. The surface of the drum is covered with a series of parallel conductors, each of which forms a track around the circumference of the drum, with a circular track spacing of 1/400 in and separated by insulating material. Each circular track can be charged to attract oppositely charged toner. When the drum rotates past the toner mechanism, the drum is completely covered with the toner, and when the drum is turned again, it passes through a charged toner removing mechanism so that the toner removing mechanism can also attract the toner. For each conductor track, the intensity of charge changes as the drum rotates, so some of the toner is sucked away by the toner removal mechanism and some of the toner is retained. In this way, an image is formed on the drum. This imaging method is suitable for fast and powerful devices (the prototype is running at a speed of 25 pages per minute. It is understood that this technology can also achieve higher speeds and is suitable for 1 million pages of printing jobs per month). Toner consumption can be minimized because the use of 7 color toners rarely requires mixing with other toners, and the toner has a wide color gamut.
Oce launched a commercial launch at the 2001 Cebit Expo. The price has not yet been determined and is expected to be 25% of Canon's CLC 1000 price (CLC 1000 price range is between 11.5 and 150,000 US dollars, depending on the RIP used), per page The cost is also less than 25% of Canon. (Hao J.E.) (From "Printing Technology" No. 2 of 2001)
The NexPress 2000, 2100 Digital Press, developed in collaboration with Heidelberg (Kodak) and Kodak (Kodak), is similar to most laser printers and uses photoconductor drum imaging technology, but it uses liquid crystal arrays instead of laser imaging, dry The toner is transferred to the paper by the blanket cylinder. This is reminiscent of Lndigo's E-print, but lndigo uses a blanket cylinder for all colors, while NexPress is a cylinder pair of colors. The original NexPress model had 4 sets of printing units, while the 2100 had an empty space where the 5th printing unit could be installed. NexPress has a print speed of 70 pages per minute (A4 single sided) and 35 pages per minute for double sided printing because printing double sided passes twice through the printing unit. NexPress is designed for a two-shift, one-month, one-month print job and can load toner and paper during the printing process.
The liquid crystal imaging head can achieve 600 dpi resolution, using 8 bits of gray per pixel to improve color reproduction (if necessary, the imaging head can do 12 bits of gray per pixel). The main paper path is linear, suitable for one-sided printing of hard paper, and the paper is carried by a belt with static electricity. In duplex printing, the paper is returned to the printing unit after one cycle, and during the cycle, the paper is flipped along its axis of motion and continues to be carried by the conveyor a second time through the printing unit. The entire cycle can accommodate 18 sheets of paper at a time, so when the two-sided printing is finished, when the 18 pages are printed on the first side and the second side is printed, the blank paper feed is stopped. The toner is heated and melted outside the printing press. The melting process Heidelberg Company will not talk about it. This may involve some patents. The NexPress 2100 also provides a front end for NexPress that supports variable data printing at full engine speeds.
Before the Drupa exhibition, Deutscher Drucker magazine printed 16,000 inserts with NexPress and worked in very hot weather. In general, photocopiers belong to office equipment, and presses are entirely production and processing equipment. The category to which a digital press belongs is not yet clear, but NexPress is clearly positioned as a production and processing device.
The NexPress 2100 became a commodity at the beginning of 2001 and the price was within 350,000 US dollars. The cost per page has not yet been estimated, but it is said to be very competitive.
Futurecolor competing with NexPress
Xerox (Xerox) has launched the DocuColor 2000 series before the Drupa exhibition. It is understood that it is developing another high quality new digital printing machine, Futurecolor, which will be launched in about 1 to 1.5 years. Currently, it only knows that it is applicable to 1 million per month. Page impression users, from this indicator, are similar to the NexPress 2100.
The fastest inkjet digital printer, Scitex Digital Printing, displayed its VersaMark Business Color Press (VersaMark Commercial Color Press) on Drupa 2000, which is regarded as an unexpected strong product of Drupa 2000.
VersaMark is a fast, 300 dpi inkjet digital press. If fully equipped, it can print (20in roller) double sided 500 feet per minute, that is, can print about 8180 pages per minute, double sided, and full color pages. Or 36 LIPS. Its price is approximately US$1.2 million (single open sixteen) to US$5 million (two-sided eight open). The inkjet print heads used by VersaMark are the same as the inkjet print heads on Scitex's 1999 monochrome book press. They are all 9in inkjet heads. Scitex is testing machines that print 800 to 1,000 feet per minute.
The inkjet head technology is the patent of Scitex Digital. Scitex Digital has begun to equip the presses developed for other companies with its inkjet heads, one of which is an agreement with Matti Technology of Switzerland, which uses Scitex inkjet printheads.
Compared to sheet-fed offset printing, VersaMark's output looks relatively rough, the colors are slightly darker, and there are some punishing bars on the page, but its quality is comparable to that of rotary printing products. The conclusion is that the print quality of VersaMark Business Color Press is suitable for a variety of medium and low grade print jobs. If work determines that this high speed of VersaMark is required, VersaMark is a wrong choice in the current color digital printing market.
Electrocoagulation imaging of Elco 400
The prototype that Elcorsy Company introduced on IPEX 98 is called "elcographic", it can compare with offset printing machine in speed, quality and cost per page. Drupa 2000 was the second time it faced the public and caused great interest from visitors.
The model displayed on the Drupa 2000 was the Elco 400, which prints 400 feet per minute (twice the speed at IPEX 98). The resolution has also been increased to 400 dpi. The 18-inch roller prints 1745 letter-size color pages (29 LIPS) per minute in a double-sided configuration. The working principle is that there is a thin layer of special ink on the surface of the metal drum. When the drum rotates through an electrode array, if the electrode is turned on, current flows through the ink, causing the ink to “condense†on the drum surface. The squeegee scrapes the non-agglomerated ink and then the image is transferred to the paper roll. It should be said that the Elco 400 should still be a prototype, configured for printing small print files. New prints can be loaded during the previous print run. The cost of printing a full-color letter size image is about 1 cent. Elcorsy will provide a commercial version of the machine in 2001, starting at approximately $1 million.
Quality Improvement Drupa 2000 exhibited machines that showed substantial progress since the IPEX exhibition in 20 months. The machine does not look like a conceptual printer in a laboratory, but rather a commercial product. Due to the 400 dpi resolution, sharp text can be produced even for small characters. In the case of halftone, generally only 400 dpi machines are rough, but due to the inherent gray scale capability of elcography, it is no longer a problem.
Although there are problems in the existing problems, from the perspective of printing proofs, there are obviously some problems that need to be solved:
(1) There is a white stripe along the direction of paper feed. These streaks collect dust or debris on the imaging head, causing imaging failure. Elcorsy believes that configuring an electrode cleaning system will solve this problem and plan to do so.
(2) There are still some odd black patches on some images. Elcorsy thinks this is due to software glitches and is ready to be repaired.
(3) The pressure of the ink squeegee must be fairly stable. If the pressure is not high enough, some of the ink that would have been scraped off will be left on the drum, which is the reason for the gray pattern of spots that are created in the bright areas. If the pressure is too high, the small dots of condensed ink are also removed by the squeegee. This is the reason for the loss of highlights. These problems indicate that the existing squeegee system cannot meet the requirements. Elcorsy is making every effort to improve. According to the improved working mode, most of the un-agglomerated ink will be removed before the squeegee is performed. Then, using the very light squeegee pressure to remove the remaining ink, does not affect the small dots (for text-only prints, the squeegee pressure problem is not so important, the pressure can be greater).
Can't Print Three Primary Colors The models that were exhibited on Drupa 2000 are running in double-sided, mono mode, and it is not yet possible to evaluate the quality of their three-primary printing.
Elcorsy plans to release merchandise printing presses within 1 year and will start focusing on monochrome and spot color printing, such as books, documents and label printing, as well as short-run newspaper printing and wallpaper printing. Elcorsy plans to subsequently introduce three primary colors.
The innovative sheet-fed press Xeikon plans to market its new sheet-fed digital press, the CSP 320D, which has a speed of 32 pages per minute (0.5 LIPS). It uses some parts of the DCP series web. Plus some new technological innovations.
Vertical and horizontal paper feeding problems A feature of the web DCP series printer engine is the vertical toner mechanism, which has eight such toner mechanisms (four on each side of the paper roll) to ensure that High-speed, accurate positioning with two-sided printing. The vertical design of the DCP series presses uses the same mechanism on both sides of the paper roll (good for design and maintenance), but it requires a vertical paper path in the toner-related work stage, in the web machine This is not a problem, but it is not desirable for sheet-fed machines. Sheet-fed printers prefer short and straight paper paths and therefore prefer horizontal paper paths.
The toner of the CSP 320D is not transferred directly to paper like other Xeikon printers. It uses the OPC tape as a toner-carrying mechanism and combines its vertical direction of toner handling with a short, horizontal paper path. There are two OPC tapes on the CSP 320D (respectively, for the upper and lower surfaces of the paper), which are charged at the laser imaging mechanism, and then collect the toner when moving vertically, and then through a series of rollers, when the paper moves horizontally, Toner is transferred to paper. The roller feeds four toner-carrying areas on each OPC belt (corresponding to four-color images of yellow, blue, green, and black) through a zigzag route. In this way, the 8-color toner-carrying area on the two OPC tapes is applied to the paper almost at the same time.
The CSP 320D uses an OPC with toner carrying system to achieve a very short paper path (perhaps the shortest one seen in a double sided press). The shorter the paper path, the less chance of paper jamming, and the difficulty of locating problems. As the first model, the paper path of the CSP 320D has a curve, and Xeikon is planning to implement a true “through-pass†form to facilitate double-sided printing of hard materials.
Other new technologies Due to the failure to get a suitable LED array, the CSP 320D uses laser imaging head technology (DCP series printers use LED arrays). Another new technology used on the CSP 320D is the hot-roller fushing system. Since both sides of the paper are printed at the same time, the CSP 320D only needs to melt through the toner at a time, which avoids the difficulties of accurate positioning of other double-sided printing presses. Before the other side of the paper is printed on the second side of the paper, the first side has been printed, and heat and pressure during processing may cause the paper to stretch.
Seven-color digital presses with seven imaging drums On Drupa 2000, Oce once again demonstrated its presses using seven-color toner (CMYK plus RGB). The machine is called Color Copy Press. The format has been on display for several years and its commercial model was introduced in 2001.
Its main technical feature is that there are seven imaging drums (one for each color toner). Unlike the photoreceptor drums on laser printers, it works on the electrostatic principle. The surface of the drum is covered with a series of parallel conductors, each of which forms a track around the circumference of the drum, with a circular track spacing of 1/400 in and separated by insulating material. Each circular track can be charged to attract oppositely charged toner. When the drum rotates past the toner mechanism, the drum is completely covered with the toner, and when the drum is turned again, it passes through a charged toner removing mechanism so that the toner removing mechanism can also attract the toner. For each conductor track, the intensity of charge changes as the drum rotates, so some of the toner is sucked away by the toner removal mechanism and some of the toner is retained. In this way, an image is formed on the drum. This imaging method is suitable for fast and powerful devices (the prototype is running at a speed of 25 pages per minute. It is understood that this technology can also achieve higher speeds and is suitable for 1 million pages of printing jobs per month). Toner consumption can be minimized because the use of 7 color toners rarely requires mixing with other toners, and the toner has a wide color gamut.
Oce launched a commercial launch at the 2001 Cebit Expo. The price has not yet been determined and is expected to be 25% of Canon's CLC 1000 price (CLC 1000 price range is between 11.5 and 150,000 US dollars, depending on the RIP used), per page The cost is also less than 25% of Canon. (Hao J.E.) (From "Printing Technology" No. 2 of 2001)
Living Room Side Chairs,Leather Chairs,Upholstered Side Chair Manufacturer in China
Foshan Misirui Furniture Co., Limited , https://www.misiruifurniture.com