A schematic diagram takes a look inside Xeikon's Trillium technology.
Photo credit: Xeikon
The Trillium paper path is on display at TagG Informatique, a Xeikon beta site in France.
Photo credit: Xeikon
In 2012 Xeikon announced that it had acquired a research company active in liquid toner electrophotography. Its intellectual property provided the foundation upon which Xeikon is developing a liquid toner based printer. The technology was presented publicly for the first time at drupa 2012 with a single station unit shown behind glass printing at 60 meters per minute as a technology demonstration, but without showing or handing out print samples.
Though interesting, this technology demonstration did not fully convey the potential of the technology. Now Xeikon has made public some more details on the technology and its planned first product implementation, which show how the company intends to challenge inkjet technologies at higher volumes.
According to Xeikon, Trillium is targeted at high quality print applications, similar to the current 8000 Series dry toner printers, but designed for higher print volumes and with an improved cost structure that will challenge not only inkjet, but also provide an improved break-even point versus offset. In short, Trillium is an extension of the Xeikon product portfolio of document printers. The company plans to position the technology for demanding high coverage colour applications that inkjet cannot reach from a quality or cost perspective.
The base imaging process is liquid toner electrophotography. The toner particles used are about 2-3 microns in size, instead of about 7 micron as in Xeikon’s current dry toner products. This should allow very high resolution and a thin colorant layer on the substrate. The liquid carrier traps the small particles without letting them become airborne, allowing very precise handling of these fine particles. A liquid paraffin type imaging oil is used to transport and trap the pigment during image transfer. Xeikon stresses that there are three transfer steps from a metering roller to the OPC drum (Organic Photo Conductor) to the intermediate roller to the substrate. Very small gaps between cylinders, termed “micro gaps,” allow precise transfer from drum to drum. During the transfer most of the imaging liquid is retained while letting the toner pass. Finally the toner with some residual imaging oil is transferred to the paper, while the rest of the imaging oil is recycled.
Other parts of the imaging process builds upon tried and tested Xeikon imaging technology. The printer will use Xeikon’s own LED-imaging technology, resulting in the same resolution of 1,200 dpi. The process uses a seamless OPC drum as in current products, but they are bigger to allow for faster speeds and heavier workloads. Fusing is done with heat and pressure in a final fusing unit.
Trillium today is a technology, not a product. Xeikon, however, has given some hints about what a future product will look like. The proposed product consists of two vertical towers; one for each side of the paper, with a turn bar in between the towers. The design is larger than the current duplex tower models, but is still compact through the use of vertical towers. Xeikon targets roughly 11 meters (36 feet) as the length for the printer. The first model will have a speed of 60 meters per minute (approximately 200 feet per minute). Doubling the speed in a future model is in sight. With a planned imaging width of around 500 mm/19.8” (likely to be the same as the 504 mm imaging width in the current Xeikon models) this would roughly translate into 800 images per minute for a duplex printer. The paper range is targeted for 60 to 250 gsm.
Currently Xeikon runs a customer engagement program that provides key users the ability to give input into requirements for the upcoming product. Xeikon has a short list for beta sites so far and after this summer Xeikon will conclude where the beta test will take place, adding that the first sites will be in Europe. The field test will start in the first quarter of 2014 and devices will be tested for about six months. Afterwards there will be a full launch, possibly by the end of 2014. Top candidates for a Trillium based printers are users with three (or more) top of the line Xeikon 8000 printers. Coincidentally three 8800 printers with a speed of up 260 ppm have the same output as the proposed Trillium-based printer. Xeikon already announced that users can buy 8800 printers today and get them exchanged for a Trillium printer when it becomes available. Hardware pricing is expected to be comparable to three 8800 printer which would put the price at around $3 million.
Trillium is not going to replace the current portfolio of dry toner devices – not even the 8000 Series models for document printing. According to Xeikon these will remain the models of choice for users with lower volume needs. The Trillium product is billed for 5 million A3 impressions per month as targeted volume and a duty cycle in the 30 million A4/month range.
Xeikon is active in packaging and label printers as well. The first Trillium products will be targeted at document printing, but future label & packaging applications are possible. For the time being Xeikon wants to focus on document printing first where it sees bigger opportunities. Also substrates for label & packaging are far more demanding.
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