| 摘要 |
PURPOSE: A speed-controllable roller device is provided to instantly control the printing speed through the minute vibration of a buffer roller without stopping printing. CONSTITUTION: A speed-controllable roller device comprises a working roller, a marker, a sensor, and a buffer roller. The working roller(110) is rotated by the power provided from a control motor. The marker marks a specific position on a side of a film transferred on the working roller. The sensor senses the location of the marker. The buffer roller(120) controls the transfer speed of the film. |
