This publication relates a method of additive manufacturing 3D objects using thermoplastic materials. When depositing a layer of an 3D object, some traces within that layer are printed using an increased temperature to improve the strength of the object. The printing temperature may only be increased for those parts (i.e. pockets) that are enclosed by those parts that are printed using regular (i.e. lower) temperatures.
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van Kessel, Jaime and Heijmans, Tom, "Hot Pockets", Technical Disclosure Commons, (July 05, 2022)