Patent ID: 8833914
Filing Date: 2014-09-16
Classification: B41J

Abstract:
1. An image recording apparatus comprising: a liquid chamber configured to store liquid therein and configured to be in fluid communication with atmospheric air; a first path configured to allow the liquid to flow out of the liquid chamber therethrough, wherein the first path has a flow resistance R when the liquid flows through the first path; a second path configured to be connected to the first path, wherein the second path has an internal pressure; a recording head configured to eject the liquid supplied via the second path, wherein the recording head is configured such that a predetermined operation of the recording head causes the liquid to flow to the recording head at a flow rate greater than or equal to a minimum flow rate I; a pressure responsive portion comprising a membrane configured to move in response to the internal pressure of the second path and configured to move when a pressure differential between inside and outside of the membrane is greater than or equal to a minimum pressure differential ΔP; a detector configured to detect a position of the membrane; and a controller configured to determine presence of the liquid in the liquid chamber based on detection by the detector, wherein the flow resistance R, the minimum pressure differential ΔP, and the minimum flow rate I are set, such that the following condition is satisfied: