Patent ID: 6406137
Filing Date: 2002-06-18
Classification: B41J

Abstract:
A production method of an ink-jet print head comprisinga first passage provided with arranged liquid ejection openings for ejecting a liquid used for printing that communicates with one end of a liquid ejection part for conducting the liquid into said liquid ejection part, a second passage that communicates with another end of said liquid ejection part for supplying the liquid to said liquid ejection part or conducting the liquid in said liquid ejection part to the outside, and open/close means provided in said second passage for selectively communicating the inside of said second passage with the outside to discharge the liquid in said second passage to the outside, wherein said open/close means is detachable from two opening ends juxtaposed in said second passage, and when said open/close means is attached to said two opening ends a communication passage is formed for communicating said two opening ends with each other, said method comprising the steps of: supplying the liquid from said first passage to said second passage; discharging the liquid supplied to said second passage through said two opening ends by removing said open/close means from said two opening ends juxtaposed in said second passage; and attaching said open/close means to said two opening ends juxtaposed in said second passage after discharging the liquid supplied to said second passage, thereby forming a circulating route.