Glueless pocketed spring cushioning unit assembler

A cushioning unit assembler, comprising:

• first and second rows of welding heads, the welding heads of the first and second rows of welding heads having respective welding positions and respective retracted positions, a main axis of the welding heads of the first row of welding heads oriented in a first dimension while in the respective welding position, wherein the first row of welding heads are aligned with each other along a second dimension perpendicular to the first dimension;
• a transport having a main axis oriented in the second dimension;
• and
• a feed module including a pocketed spring intake and a pocketed spring outflow, the feed module mechanically coupled to the transport to enable the transport to move the feed module in the second dimension along a scope of movement, so that an exit aperture of the pocketed spring outflow is aligned with the welding heads of the first row within at least a portion of the scope of movement while the welding heads of the first row are in the welding position;
• wherein the first row of welding heads is configured to close together with the second row of welding heads to enable welding two rows of pocketed springs together.

A cushioning unit assembler, comprising:

• first, second, and third rows of welding heads;
• a feed module configured to sequentially feed pocketed springs of a continuously connected string of pocketed springs onto the first and second rows of welding heads;
• and
• a power supply electrically coupled to at least some of the welding heads to provide welding energy thereto;
• wherein the first row of welding heads is configured to close together with the third row of welding heads to enable welding two rows of pocketed springs together.