| 摘要 |
PURPOSE:To perform a stable serial print without sticking and zigzag print, by so setting a drawing force of a ribbon when the ribbon is drawn at a predetermined speed to a specific range as to form an angle of 45 deg. to a line for connecting center of rotary shafts of two spools. CONSTITUTION:In order to draw a ribbon 4 from a cassette body 2 by rotating a spool 3b of a cassette 1 for a ribbon, a force which is larger than total sum of frictional forces of respective parts is required. Then, the case where it is actually mounted in a printer is presumed, and a drawing force when the ribbon 4 is drawn from the cassette body 1 at a speed of 100m/sec in a direction of an arrow C is set to a range of 7-14g. In this case, if the force is less than 7g, supply of the ribbon 4 becomes excessive, and a zigzag print occurs, and hence is not preferable. If the force exceeds14g. supply of the ribbon 4 becomes insufficient, and hence preferable printing is not conducted. |
