inkjet printers have a nozzle like printhead.
inkjet printers have a nozzle like printhead.
what type of printer has a nozzle like printhead?
inkjet
unlike some inkjet printers where the cartridge includes the print head, the printhead in these printers is fixed. over time, parts of the printhead may become permanently clogged, resulting in unsightly streaks, but there are printhead and drum cleaning cycles and jet-substitution options which can resolve most printing issues. there is a filter for the ingested ink implemented at least on the recent colorqube devices (8570/8870), according to a service manual for those models. dust caused by the use of cheap paper may cause printhead clogging, which is why xerox recommends the use of papers that are not prone to giving off dust and fibers during regular usage. paper dust may also accumulate as debris inside the printer; this could cause abrasions on the drum and may mimic a weak or missing jet. for this reason, the basic built-in drum-cleaning procedure is therefore recommended to be invoked at least three times before initiating printhead-nozzle cleaning cycle. the printhead system also contains a wiper-assembly unit that is used to wipe the printhead from dust, debris and residual ink, in order to protect the nozzles from clogging. overall, the design of this system is robust: printheads have been known to last one million prints or more.
solid ink
every time the printer loses power for long enough to cause the portion of ink which was being kept above its "freeze point" in the printhead to drop below that temperature, the mass of ink in each reservoir would have contracted in size enough (as a result of the cooling) to permit air to enter the printhead, which would result in print aberrations until the printhead reservoirs had been refilled by the ink-melter assembly above it. as a result, the printhead is then purged using a vacuum pump, causing some ink to be flushed from the printhead's holding tanks into the waste tray to remove the air from the printhead. (xerox printers have a "waste ink" tray for this purpose. since all four inks are dumped into a unified "waste ink" tray, it is impossible to reuse the lost ink since the four process colors coalesce to form a single solid mass in the tray, which look much like solidified candle wax drippings, but almost black.) if the printer was in its sleep state, less time without power would be required to necessitate a purge cycle than if the printer was in its ready-to-print state (since the printhead is kept much hotter when ready-to-print).
solid ink