Material welder

A material welder for welding portions of a material together, including:

• a top bar assembly and a bottom bar assembly, each assembly extending in a longitudinal direction, a portion of the top bar assembly being directly above a portion of the bottom bar assembly, the top bar assembly including a first and second heating element substantially in the same plane and the bottom bar assembly including a first and second heating element substantially in the same plane;
• at least one heating device adapted to selectively heat the first heating elements and/or the second heating elements;
• an actuator device adapted to move the top bar assembly towards the bottom bar assembly and/or the bottom bar assembly towards the top bar assembly such that the first heating element of the top bar assembly aligns with the first heating element of the bottom bar assembly and the second heating element of the top bar assembly aligns with the second heating element of the bottom bar assembly;
• and
• contact surfaces associated with respective heating elements of each of the bar assemblies adapted to contact the material during a welding process, the contact surfaces comprising:
• top contact surfaces of the top bar assembly;
• and
• bottom contact surfaces of the bottom bar assembly,
• the top contact surfaces being substantially adjacent one another and the bottom contact surfaces being substantially adjacent one another such that when the top and bottom contact surfaces contact the material and all the heating elements are heated, the resulting weld is substantially continuous in a transverse direction.