Ink supplier for ink jet recorder

摘要

The invention relates to an ink supplier for an ink jet recorder, comprising a recording head (21); a main ink reservoir (24); a back pressure reservoir (22) for replenishment with ink from the main ink reservoir, said back pressure reservoir being adapted to maintain a height of the ink liquid level therein substantially constant against an amount of ink consumption by the recording head; and a means for adjusting the back pressure reservoir (22) in its vertical position, thereby adjusting a position head of the ink liquid level in the back pressure reservoir relative to a printing head face of the recording head (21). For providing a light and cost efficient mechanism, according to the invention said means for adjusting the back pressure reservoir includes a lifting unit (32) for supporting the back pressure reservoir (22) so that it can be moved vertically whereby the position head of the ink liquid level in the back pressure reservoir (22) relative to the printing head face of the recording head (21) has a height H 1 for a printing operation which is lower than the printing head face of the recording head, a height H 2 for a wiping operation which is higher than the printing head face of the recording head, a height H 3 for a purging operation which is higher than that for the wiping operation and a height H 4 for an initial charging operation which is higher than that for the purging operation.