Shenzhen Tuozhu Technology, Bambu Lab’s parent company, filed U.S. patent application US20260264331A1, published September 10, 2026, describing a heatbed built to heat more evenly and reduce the peeling that shows up on large prints across brands, not just Bambu’s own machines.
Current Bambu heatbeds use a laminated heating sheet stuck to an aluminum plate, held to the build plate with magnets. The patent swaps that sandwich for a single “heated bed body” with a machined channel running through it, visible in the filing’s FIG. 3. Claim 5 describes the recess as shaped like the Chinese character “凹,” meaning sunken or depressed. The heating element is one continuous loop connected to a single power supply at each end, and the loops extend into the corners, the part of a large bed most prone to lifting. A continuous loop reaching the corners could also mean faster time to target temperature, though the application does not claim independent zone heating.
The filing also describes a generic CoreXY printer, but the claims tie that machine description to the specific heatbed, so the patent would not cover CoreXY printers broadly, only ones using this bed.
Machining a recess into a single large aluminum billet is expensive in material and machining time. Bambu Lab could instead build the bed from multiple aluminum sheets layered together to avoid using one large billet, something the filing leaves open.
The PCT application is still pending, so nothing here is enforceable yet, and there’s no published performance data: no measured reduction in warping, no temperature uniformity numbers, no price for a replacement bed. If the design does what it claims, replacement heatbeds, and possibly the printers themselves, could cost more once it reaches production.