| 摘要 |
<p>A high-speed printer with two or more individually driven, coordinately controlled, co-printing wheels carrying type elements supported by radial spokes or petals. One or more circumferential gaps (spoke-free positions) in each wheel permit read-through and hammer action or ribbon- impacting printing spoke deflection through print cycle instantaneously inactive wheel(s). The redistribution of symbols using a plurality of wheels, major reduction in size and moment of inertia of each wheel and drive motor, redundant wheel openings and redundant symbols distributed among the wheels greatly increase operating speed, materially assisted by microprocessor optimal lookahead wheel, opening and symbol preselection.</p> |
