| 摘要 |
<p>The invention relates to a method in printheads (1) with a plurality of print elements (4) arranged movable in relation to each other and a moving mechanism (7, 9, 11, 12, 14) with magnetic field-responsive forces for moving selectable print elements to print or inactive positions. With utilisation of the method the forces with which selected print elements are moved in appropriate cases to their print positions can be changed in co ordination for a plurality of print elements. In accordance with the invention this is achieved by a magnetic field change co ordinated for several print elements. The invention also relates to a printhead (1) with a plurality of first electromagnet means (9, L1 L24) for moving selectable print elements (4) and also a second electromagnet means (LB) common to a plurality of print elements, for co ordinated change of the forces for a plurality of print elements with which the print elements can be moved to their print positions. A method and a printhead in accordance with the invetion are primarily intended for matrix printers.</p> |
