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Interior of an HP DeskJet 920C, showing the spittoon and cleaning station. A mound of dried ink inside the HP spittoon. When the pile grows high enough, it jams the printer. An inkjet spittoon is a component in electronic inkjet printers. Inkjet printers commonly experience a problem of drying out which blocks the flow of ink.
Piezoelectric (left) and thermal (right) drop generation schematic. A print head will contain several such nozzles, and will be moved across the page as paper advances through the printer. A Canon inkjet with CMYK cartridges Piezoelectric printing nozzle of an EPSON C20 printer Howtek style inkjet nozzle (tubular piezo not shown)
Some manufacturers incorporate the printer's head into the cartridge (examples include HP, Dell, and Lexmark), while others such as Epson keep the print head a part of the printer itself. In 2014, Epson introduced a range of printers that use refillable ink tanks. Epson's EcoTank printers offer a refillable ink tank system, which can ...
Some tank-on-carriage printers such as Epson use a fold-over clamping system over the tank to secure it in place on the print carriage. This clamp blocks the path of tubing from a continuous flow system feeding the tanks, and the print carriage may need to be modified by removing the clamp, cutting holes in the clamp, or installing a retrofit ...
The company developed the Micro Piezo inkjet technology, which used a piezoelectric crystal in each nozzle and did not heat the ink at the print head while spraying it onto the page, and released the Epson MJ-500 inkjet cartridge for the Epson Stylus 800 printer in March 1993.
Thus one Howtek printhead design works for two different inks. The Howtek inkjet nozzle is unique in so many ways. The design requires a strict assembly sequence and manufacturing process. One 3D printer in use in 2021 (Solidscape) still has a Howtek style nozzle as it was manufactured in 1986.