Self-pumping heat-pipe fuser roll

A method of manufacturing an energy transfer device, comprising:

• providing a heat pipe;
• and
• providing at least one spiral feature via rotating extrusion on an interior surface along at least a portion of the heat pipe, wherein a pitch of the at least one spiral feature is such that a liquid is pumped in the heat pipe during rotation of the heat pipe when liquid is present into the energy transfer device, and a thermal mass of the heat pipe is reduced by about 50%.

A xerographic system comprising:

• a heat pipe fuser roll including at least one spiral feature on an interior surface along at least a portion of the heat pipe;
• and
• a controller that controls an operation of the heat pipe fuser roll in the xerographic system, wherein a pitch of the at least one spiral feature is such that a liquid is pumped in the heat pipe during operation of the heat pipe by the controller.