In the process and machine of the invention, two strips of heat weldable material are supplied, reciprocally facing one another, in an advancement direction. A safety cover end section covers the shredder paper feed opening, and rotatably couples to the upper cover. A capacitor is exposed to the solution, wherein the solution comprises a dielectric material between the plates of the capacitor. The rider can control the direction of the recumbent vehicle by using a steering arm. In another embodiment, the pattern welding system includes an attachable plate of heat conducting material, which has a raised heating surface with a recessed area, and a vent structure.