| 摘要 |
A paper cassette unit includes a base part installed in an image forming system, a paper cassette having a compartment in which sheets of paper are accommodated, the paper cassette being detachably mounted in the base part, a cassette cover for covering an opening of the compartment when the paper cassette is mounted in the base part, and a connecting part connecting the cassette cover to the base part in such a way that only the cover stays in the base part when the paper cassette is demounted from the base part. The paper cassette unit also includes a size indicator for indicating size of the sheets of paper, the size indicator being detachably mounted in the paper cassette and having an integrally formed operating part including a set of projections corresponding to the indicated size, and a detection part for detecting the size of sheets of paper in use, the detection part having a set of switches depressed by corresponding projections of the operation part when the paper cassette is mounted in the base part. |
