The Lower Jaw Spring is an integral component within the sealing mechanism of a foot impulse sealing machine, facilitating precise and controlled sealing operations. Positioned strategically to exert consistent pressure on the lower sealing jaw, this spring ensures uniform sealing of bags or packaging materials. By effectively compressing and releasing in tandem with the machine's operation, it enables secure and airtight seals with each foot pedal activation, guaranteeing reliable packaging integrity and operational efficiency.