PRINTER DEVICE

PURPOSE:To prevent printing operation from being interrupted, by providing a remaining amount indicating means composed of a measuring apparatus for measuring the remaining amount of papers in a paper cassette and an indicator for the remaining amount of the papers, in a printer device which may indicates the remaining amount of unprinted papers in the cassette. CONSTITUTION:A measuring sensor 13 positioned on the topmost surface of stacked papers 5 issues a signal corresponding to the rotating angle of a rotary rod 13a which is rotated in accordance with the height of the topmost surface, and an indicator 14 indicates the height of the topmost surface, that is, a numerical value corresponding to the remaining amount of the papers. When the remaining amount of the unprinted papers 5 is reduced in a cassette 1, an unprinted paper remaining amount measuring sensor 13 in an unprinted paper remaining amount indicating means 12 is operated in accordance with the remaining amount of the papers 5 to measure the remaining amount thereof. A measured value obtained by the unprinted paper remaining amount measuring sensor 13 is then indicated on the remaining amount indicator 14. Accordingly, the operator may replenish papers before the papers 5 are completely exhausted, and therefore, printing operation is not interrupted.