Patent ID: 7452056
Filing Date: 2008-11-18
Classification: B41J

Abstract:
1. A liquid ejection head comprising a plurality of ejection openings arranged in a first direction and a plurality of ejection energy generating elements for ejecting liquid from the ejection openings, said liquid ejection head and a printing medium being subjected to relative movement, wherein each arrangement pitch of the ejection openings forming both end groups located in respective opposite end sections along the first direction is longer than an arrangement pitch of the ejection openings forming a central group located in a central section along the first direction, respectively, wherein the ejection openings forming the end groups are configured to eject the liquid for forming an image on the printing medium, and wherein ink droplets ejected from the ejection openings forming the end groups are drawn toward the central group to have a droplet pitch approximately equal a droplet pitch of ink droplets ejected from the ejection openings forming the central group.