| 摘要 |
PURPOSE:To alleviate noise at printing time by providing a platen having a plurality of fine holes and communicating holes, thus intaking air from the open end of the communicating holes enabling contact between a sheet to be printed and the platen. CONSTITUTION:Many holes 6 of small diameter are formed in the surface of a platen so that the fine holes communicate by communicating holes 7 in the platen. The open ends 5 of the holes 7 on the sides of the platen communicate with a compressor 2 so that a plurality of specific holes of the open ends communicate through an air guide 3 with the compressor 2. The guide 3 is moved and set to intake air only at the holes 6 and the open end 5 of the platen communicating with the holes 6 to communicate with the compressor 2. Thus, the air can be intaken from the holes 6 at the printing unit and its periphery to almost completely contact the sheet with the surface of the platen. |
