Patent Number: 6,168,268

Title: Liquid replenishing method and liquid ejection recording apparatus using the same method

Abstract: A liquid replenishing method into a liquid supply mechanism, the liquid supply mechanism comprising three or more liquid supply paths, each liquid supply path having a sub-tank for temporarily retaining a liquid and for supplying the liquid by guiding the atmosphere thereinto, the liquid replenishing method comprising the steps of preparing a plurality of negative pressure generators, each for replenishing the sub-tank with the liquid, the number of negative pressure generators being smaller than the number of liquid supply paths, and grouping the plurality of liquid supply paths into groups according to the number of negative pressure generators, and establishing a hermetically closed space in a sub-tank with a greatest liquid consumption in each group, and replenishing the liquid while depressurizing the inside of the sub-tank kept as the hermetically closed space, by the negative pressure generator associated with each group.

Inventors: Sugiyama; Toshiro (Yokohama, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: B41J 2/175 (20060101); B41J 2/165 (20060101); B41J 002/18 ()

Expiration Date: 01/02/2018