Method for carrying out an electronic transaction using several signatures. Embodiments of the present invention reuse the allocated and dma_binded memory buffers again and again, eliminating the repeated memory management of each data packet. A moving handrail repairing device has heating means for melting the surface portion through heating. The \u201cdummy traces\u201d act as heat sinks to transfer of thermal energy from the narrow metallic traces used in the thermocouple. As such, the apparatus is adapted to lower the viscosity of the ink prior to the ink being ejected through the thermal inkjet printhead. In this method, the timing of start of oscillating motion of oscillating rollers is regulated.