|
(11) | EP 0 605 098 A3 |
(12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||||||
(54) | Serial impact printer |
(57) A serial impact printer comprises at least two and preferably four platen parts (8A-8D)
facing a print head (2) with a printing medium (P) interposed therebetween. One of
the platen parts (8A-8D), each having a different arrangement of projections (E),
is selected according to the thickness of the printing medium (P). The projections
(E) correspond to the print wires (W) on the print head (2). The selected platen part
(8A-8D) operates in cooperation with the print head (2) so that stable, high quality
printing is performed on the printing medium (P) of varying thicknesses, from a single
cut sheet to multiple-sheet paper sets. With optimum projections (E) selected to assist
the printing by the print wires (W), the printed sheets are protected from piercing
by the print wires (W). |