Prusa has patented a very unusual and possibly quite powerful hot end design.
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Creality Patent Puts Internal Fins Inside A High-Speed Hot End
Creality wants to heat the middle of the filament instead of waiting for heat to work its way inward from the walls.
Prusa Research Unveils MK4S with Major Cooling Upgrades and Faster Print Times
Sticking to the pattern, Prusa Research announced the Original Prusa MK4S this week.