| 摘要 |
A printing system is described having three continuously rotating print wheels slidably mounted adjoining each other on a splined shaft. A record sheet, which may be a card or a sheet of paper is mounted adjacent the peripheries of the wheels and an electromagnetic hammer is mounted on the other side of the record sheet. The printing operation includes the actuation of the hammer in timed relationship to the position of the wheels. The wheels are shifted together by a single yoke to move a desired wheel into printing position. Three wheels are used in order to include all the alphabet characters, all the numerals from 0 to 9, and various other punctuation marks.
|
