| 摘要 |
An apparatus (20) for printing images on sheet material (S) has a roller platen (24) mounted within a housing (16) for supporting the sheet material (S), and a print head mounted adjacent to the platen (24) for receiving the sheet material (S) between the platen (24) and the print head (26) and printing images onto the sheet material (S). A donor web (W) bearing printing ink is interposed between the print head (26) and the sheet material (S) for forming graphic images on the sheet material (S). Two first wiper-blade assemblies (58) are mounted on either side of the roller platen (24) and two second wiper-blade assemblies (92) are mounted on either sides of the print head (26), for continuously removing dust particles and other debris from both the sheet material (S) and the donor web (W) prior to passage between the print head (26) and the roller platen (24). <IMAGE> |
