Patent ID: 9409405
Filing Date: 2016-08-09
CPC Classification: B41J

Claim Text:
1. A method of controlling a liquid ejecting apparatus for a recovery operation of a head unit, said liquid ejecting apparatus including said head unit having a plurality of heads each including a plurality of nozzles for ejecting a liquid, a liquid reservoir for temporarily storing the liquid for supply to said head unit, a plurality of supply passages for supplying the liquid from said liquid reservoir therethrough to said respective heads, and a plurality of open/close parts provided in said respective supply passages, said open/close parts being switchable between an open position independently ensuring the communication between said liquid reservoir and said heads and a closed position independently closing off the communication between said liquid reservoir and said heads, said method comprising the steps of: a) pressurizing the liquid inside said liquid reservoir to a state of positive pressure higher than atmospheric pressure, while maintaining all of said open/close parts in said closed position, to thereby performing pre-pressurization; b) bringing a first one of said open/close parts into said open position and bringing all other ones of said open/close parts into said closed position to perform a first purge, said step b) being performed after said step a); d) bringing a second one of the open/close parts except said first open/close part brought into said open position in said step b) into said open position and bringing all other ones of said open/close parts into said closed position to perform a second purge, said step d) being performed after said step b); and c) making said liquid reservoir open to the atmosphere, said step c) being performed after said step b) and step d), said step b) being the step of bringing said first open/close part into said open position, and then bringing said first open/close part into said closed position after a predetermined time period has elapsed since said first open/close part was brought into said open position, said step c) being the step of maintaining said open position of said first and second open/close parts brought into said open position in said steps b) and d) when already in said open position, and bringing said first and second open/close parts into said open position when in said closed position, to make said liquid reservoir open to the atmosphere.