| 摘要 |
<p>Abstract A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a single sealing zone, and a weakening zone disposed within the 5 single sealing zone. The single sealing zone may be a heated perforator, and may include a heating wire. The heating wire may be an NiCr wire stitched into the heater, and be disposed on a cap or on the seal bar. The weakening zone may create a line of weakness that is uniform or varies in intensity. The sealing zone may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, 10 microwave or radiative energy. Lr) cli ry) F57 o 4 C"i 101 ol C:) C"/i C3) C:) Ci cn C/i col C) cn C) C/j C) m CD C/j C"i C/j LC') CYN cr C:> C:) C LL- Ct: (Ij CL</p> |
