1. Technical Field
The present invention relates to a liquid ejecting apparatus, such as an ink jet printer, and a liquid supply device provided in the liquid ejecting apparatus.
2. Related Art
In general, an ink jet printer (hereinafter, simply referred to as a ‘printer’) is widely known as an example of a liquid ejecting apparatus that ejects ink (liquid) from a nozzle of a recording head (liquid ejecting head) onto a target. In such a printer, poor printing, such as dot missing, may be caused when a bubble is generated in the ink ejected from the recording head. For this reason, a printer capable of making gas dissolved in ink escape (removed) from the ink in order to suppress such poor printing has been proposed in the related art (for example, refer to JP-A-2006-95878).
In the printer disclosed in JP-A-2006-95878, a part of a side wall that forms a common liquid chamber (defoaming chamber) of a printing head (liquid supply device) is formed of a gas permeable film (partition wall), and a chamber (decompression chamber) that is decompressed by a pump is provided on an opposite side of the common liquid chamber with the gas permeable film interposed therebetween. In addition, since a pressure difference between the common liquid chamber and the chamber occurs when the chamber is decompressed by the pump, the gas dissolved in ink within the common liquid chamber permeates through the gas permeable film to escape into the chamber due to the pressure difference.
However, in the printer disclosed in JP-A-2006-95878, it is not particularly considered to make the chamber airtight reliably. Accordingly, in the case of stopping a pump after decompressing the chamber with the pump, there was a possibility that the inside of the chamber would not be maintained in a decompressed state.