| 摘要 |
PURPOSE:To use printing papers as a barrier for disturbing propagation of noise, by a method wherein a conveyance path which conducts a printing paper from a opening part of a printer to the printer is bent, and the conveyance path is closed when a printing part pulls the printing paper. CONSTITUTION:A printing paper 1 inserted from an opening part 3 is moved through a conveyance path 7 in a box 2 to reach a printing part 5. The printing paper 1 is pulled with a guide roller 8 in the printing part 5. The printing paper 1 comes in contact with the box 2 constructing the bent conveyance path 7 and closes the conveyance path at two positions A and B. When transmission loss of sound due to one printing paper 1 is taken as TL0dB, noise is thus reduced by 2TL0dB at the opening part 3. |
