Rotary impulse sealer

An impulse seal roll comprising:

• a) a rotatable cylindrical resistive member having an insulated surface and a resistive material disposed thereon;
• b) a rotatable cylindrical conductive member in electrical communication with said resistive material, said conductive member having a plurality of electrically conductive strips extending laterally across the surface of said conductive member;
• and
• c) at least one electrical contact in electrical communication with at least one of said electrically conductive strips whereby current flows from said electrical contact, through said conductive zone, and into said resistive material.

A transverse rotary impulse sealer comprising:

• a) first and second rotatable cylindrical conductive members each having a plurality of electrically conductive strips extending laterally across the surface of said conductive members;
• b) a rotatable cylindrical resistive member disposed between said first and second conductive members, said resistive member having a heating zone, cooling zone an insulated surface, and a plurality of electrically resistive strips extending laterally across the surface of said resistive member, wherein said resistive strips are in electrical communication with said first and second conductive members;
• and
• c) an electrical contact in electrical communication with said first conductive member and a ground contact in electrical communication with said second conductive member, wherein said heating zone is defined by current flow from said electric contact to said ground contact.