Patent ID: 6082851
Filing Date: 2000-07-04
Classification: B41J

Abstract:
A liquid ejection printing apparatus performing printing by ejecting a liquid toward a printing medium, comprising:a liquid ejection head portion having a liquid ejecting printing head ejecting a liquid and a first tank holding the liquid to be supplied to said head;a second tank holding a liquid to be supplied to said first tank and having an atmosphere communicating opening for introducing an atmospheric air;a third tank receiving the liquid from said first tank and capable of supplying the liquid to said second tank;a first liquid supply passage for communicating said first tank and said second tank;a second liquid supply passage for communicating said second tank and said third tank;a third liquid supply passage for communicating said third tank each to said first tank;said first tank, and said third tank each forming an enclosed space excluding supply passages connected respectively thereto;a pump capable of sucking a gas within said third tank provided in a passage other than said first, second and third supply passages and a first valve provided in said second supply passage for opening and closing said second liquid supply passage; anda second valve connected to said third tank for communicating the gas within said third tank to outside.