Patent ID: 8864127

Claim:
A paper supply unit comprising: a paper supply cassette configured to have a bottom plate for placing stacked recording media thereon, the bottom plate being able to be lifted at a downstream part in a recording medium sending out direction; a sending out part configured to be disposed above and facing the downstream part of the bottom plate when the paper supply cassette is loaded at a paper supply position, wherein when the paper supply cassette is loaded at the paper supply position, the bottom plate is lifted so that the recording media come into contact with the sending out part; a support member configured to be rotatably fitted at a side part of the paper supply cassette, said side part being disposed relatively downstream in the recording medium sending out direction; and an elastic member provided between the support member and the bottom plate to connect the support member and the bottom plate, wherein elastic force of the elastic member is used to lift the bottom plate, wherein the support member has plural fastening parts for fastening the elastic member, and the elastic force of the elastic member is changeable using the plural fastening parts, and the support member includes two plate members combined together with a certain distance therebetween, and the plural fastening parts are placed between the two plate members.