Multi-heating 3D printer and 3D printing method

Cynthia Hsin-tsing Mu, Hong Kong (CN); Guijun Li, Hong Kong (CN); Kong Wai Lee, Hong Kong (CN); Qiaoyaxiao Yuan, Hong Kong (CN); Yang Xu, Hong Kong (CN)

USPTO: us-12648585 · published 2026-06-09 · patents · A23P 20/20· A23L 5/15· B33Y 10/00· B33Y 30/00· H05B 3/0076· A23P 2020/253

Multi-heating 3D printer and 3D printing method

Guijun Li, Hong Kong (CN) , Kong Wai Lee, Hong Kong (CN) , Yang Xu, Hong Kong (CN) , Qiaoyaxiao Yuan, Hong Kong (CN) , Cynthia Hsin-tsing Mu, Hong Kong (CN) This is my paper

Pith reviewed 2026-06-11 09:31 UTC · model grok-4.3

classification patents A23P 20/20A23L 5/15B33Y 10/00B33Y 30/00H05B 3/0076A23P 2020/253

keywords 3D food printerextrusion nozzleinfrared heaterlaser-induced graphenelaser assemblyheated printing platformfood extrusion

0 comments

The pith

A 3D food printer combines an extrusion nozzle with an infrared heater made from laser-induced graphene, a laser assembly, and a heated platform to heat food during printing.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The patent presents a 3D printer for food that extrudes material from a nozzle while applying heat from multiple sources at once. An infrared heater that includes a laser-induced graphene component, at least one laser, and the printing platform itself all heat the extruded food. The design specifies that these elements work together on the same printer head and platform assembly. A reader would care if this arrangement allows printing of edible items with simultaneous layer formation and cooking.

Core claim

The apparatus is a 3D food printer with a printer head that includes an extrusion nozzle, an infrared heater containing a laser-induced graphene heater, and a laser assembly with at least one laser, together with a heated printing platform; the nozzle extrudes food onto the platform while the platform, infrared heater, and laser each heat the extruded food.

What carries the argument

The multi-heating assembly on the printer head and platform, where the laser-induced graphene infrared heater operates alongside the laser assembly and platform heating to control temperature of food extruded by the nozzle.

If this is right

Extruded food receives heat from the platform below, the infrared source, and the laser during the printing process.
The laser-induced graphene heater supplies infrared radiation as one of the active heating methods.
All three heating sources are configured to act on the same food material after it leaves the nozzle.
The platform remains heated while the printer head moves and deposits layers.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

The printer could support food materials that need staged heating to set texture or kill bacteria during deposition.
Layer-by-layer heating might reduce the need for post-print cooking in some applications.
The graphene heater choice implies interest in thin, flexible heating elements that fit compact printer heads.

Load-bearing premise

The listed heating elements can be combined in one printer without major integration problems that would prevent the system from functioning as described.

What would settle it

A working prototype in which the extrusion nozzle, graphene infrared heater, laser, and platform heater cannot simultaneously produce heated food layers without failure would show the claim does not hold.

read the original abstract

1 . A 3D food printer comprising: a printer head including an extrusion nozzle, an infrared heater, and a laser assembly with at least one laser; and a heated printing platform, wherein the extrusion nozzle is configured to extrude food onto the printing platform, wherein each of the printing platform, the infrared heater, and the at least one laser are configured to heat food extruded onto the printing platform, and wherein the infrared heater includes a laser-induced graphene heater.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Desk Editor's Note private letter to a colleague

This is a patent claim for a food 3D printer combining extrusion with LIG infrared, laser, and platform heating, but it contains no data or prior-art analysis.

read the letter

This patent describes a 3D food printer that uses an extrusion nozzle along with three heating methods: a heated printing platform, an infrared heater made from laser-induced graphene, and a laser assembly. The claim is that all these can heat the food as it's printed. What stands out is the specific inclusion of the laser-induced graphene heater in the printer head. That seems to be the distinctive element in the combination. The document does a decent job laying out the basic setup in clear terms. The abstract gives a precise description of how the components are supposed to work together for food extrusion and heating. On the downside, there is no data at all. No tests, no measurements of temperature control, print quality, or anything else. It's just the device description and the claim. For a patent that's typical, but it means we can't tell if this setup actually improves on existing food printers or runs into practical problems like uneven heating or material compatibility. The integration is presented as feasible, but without any supporting details or prior art analysis, it's difficult to gauge the real novelty or utility. This kind of filing would mainly interest engineers or companies focused on 3D printing for food applications, especially those dealing with intellectual property. A researcher looking for new techniques or validated methods won't find much here to build on. I wouldn't recommend putting this through peer review in a scientific journal. It doesn't have the kind of evidence or analysis that referees would expect from a research contribution. It's better treated as a patent matter.

Referee Report

1 major / 0 minor

Summary. The manuscript is a patent claim describing a 3D food printer comprising a printer head with an extrusion nozzle, an infrared heater (including a laser-induced graphene heater), and a laser assembly with at least one laser, together with a heated printing platform. The claim states that the extrusion nozzle extrudes food onto the platform and that the platform, infrared heater, and laser(s) are each configured to heat the extruded food.

Significance. The multi-heating configuration could in principle allow finer temperature control during food extrusion if the components integrate without interference, but the manuscript contains no data, experiments, scaling analysis, or comparisons, so any potential significance remains unverified.

major comments (1)

[Abstract] Abstract (the sole substantive section): the central device claim asserts functional heating by the listed elements, yet the text provides no measurements, thermal modeling, or integration details to support that the combination operates as stated; this absence is load-bearing because the patent's utility rests entirely on the asserted configuration working.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for reviewing our patent application. We address the comments below, emphasizing that this document is a patent claim describing an inventive device configuration rather than a research article requiring empirical validation.

read point-by-point responses

Referee: [Abstract] Abstract (the sole substantive section): the central device claim asserts functional heating by the listed elements, yet the text provides no measurements, thermal modeling, or integration details to support that the combination operates as stated; this absence is load-bearing because the patent's utility rests entirely on the asserted configuration working.

Authors: This manuscript is a patent claim, not a scientific paper. Patent applications describe novel inventions through claims that specify the configuration and intended function without mandating experimental data, thermal modeling, or integration details. The utility of the claimed multi-heating 3D food printer rests on the described arrangement: an extrusion nozzle, infrared heater (including laser-induced graphene), laser assembly, and heated platform, each configured to heat the extruded food. This configuration itself constitutes the inventive concept for multi-mode heating in food printing. revision: no

Circularity Check

0 steps flagged

No significant circularity

full rationale

The document is a patent device claim describing a configuration of known component types (extrusion nozzle, LIG infrared heater, laser assembly, heated platform) for food printing. No equations, derivations, scaling relations, fitted parameters, or performance assertions exist that could contain internal inconsistency or reduce to inputs by construction. Integration feasibility is an engineering detail outside any derivation chain, rendering the content self-contained with no load-bearing steps to inspect.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No free parameters, axioms, or invented entities are present because the document is a patent claim rather than a mathematical or empirical model.

pith-pipeline@v0.9.1-grok · 5680 in / 970 out tokens · 32784 ms · 2026-06-11T09:31:16.634985+00:00 · methodology

Multi-heating 3D printer and 3D printing method

Core claim

What carries the argument

If this is right

Where Pith is reading between the lines

Load-bearing premise

What would settle it

discussion (0)