# US 11,439,171 B2 · Edible 3D printer filament

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- Number: US 11,439,171 B2
- Document ID: US11439171B2
- Status: Granted
- Kind: B2
- Application number: 15/958,611
- Filed: 2018-04-20
- Published: 2018-11-01
- Granted: 2022-09-13
- Earliest claimed: 2014-09-06
- Applicants: Ashley G. Herr; Paige Elizabeth Colen
- Inventors: Ashley G. Herr; Paige Elizabeth Colen
- Web page: https://patentgrep.com/patent/US11439171B2

## CPC

- A23L 29/212: Starch; Modified starch; Starch derivatives, e.g. esters or ethers (containing starch hydrolysates, e.g. dextrin, A23L29/30)
- A23L 29/206: of vegetable origin
- A23P 30/20: Extruding
- B29C 64/106: using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C 64/118: using filamentary material being melted, e.g. fused deposition modelling [FDM]
- B33Y 70/00: Materials specially adapted for additive manufacturing
- B33Y 70/10: Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
- A23L: FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF (preservation thereof A23B)
- A23P: SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

The present invention relates to an edible 3D printer filament that incorporates an active ingredient such as an oil (e,g, cannabis) extract for taste, odor or medicinal benefit, and which is capable of retaining this benefit despite the repeated thermal extrusion involved in 3D printing. The filament is made by mixing the active ingredient extraction with polyvinylpyrrolidone (PVP), starch, and super disintegrant, and spray drying the result to a powderized form. The powderized water soluble polymer with active ingredient is mixed with excipient ingredients including a plasticizer, colored/dyed arabic gum, a gelling agent, fillers, flour, a binding or thickening agent (which also gives the benefit of being a stabilizer), a lubricant, and a preservative, and is heated. The result is hot melt extruded into a filament with a diameter of 1.75 mm or 3 mm. When printed, the thermoplastic has good strength, stiffness, and physical properties, and can be 3D-printed in any shape.

## Claims

### Claim 1

A method for producing an edible filament for use in a 3D printer, comprising the steps of:
producing an essential oil by the substeps of:
obtaining dried plant material, and
performing an extraction on said plant material to produce an active ingredient comprising an essential oil there from;
preparing a water soluble polymer compound by mixing approximately 1 part said active ingredient, approximately 3.5 parts polyvinylpyrrolidone (PVP), approximately 1.5 parts starch, and approximately 1 part super disintegrant;
spray drying said water soluble polymer compound;
mixing and heating said powderized water soluble polymer compound with a plasticizer, colored arabic gum, a gelling agent, filler, flour, a binding or thickening agent, a lubricant, and a preservative, thereby forming an edible thermoplastic;
hot-melt extruding said edible thermoplastic through a die to produce a filament; and
winding said filament on a spool.

### Claim 2 (depends on 1)

The method of claim 1, wherein said step of obtaining dried plant material comprises obtaining dried cannabis.

### Claim 3 (depends on 2)

The method of claim 2, wherein said step of performing an extraction on said dried cannabis comprises extracting edible cannabis oil there from.

### Claim 4 (depends on 1)

The method of claim 1, wherein said step of hot-melt extruding said edible thermoplastic comprises extruding through a die having a 1.75 mm diameter.

### Claim 5 (depends on 1)

The method of claim 1, wherein said step of hot-melt extruding said edible thermoplastic comprises extruding through a die having a 3 mm diameter.

### Claim 6 (depends on 1)

The method of claim 1, wherein said step of hot-melt extruding said edible thermoplastic comprises extruding through a die at a temperature within a range from approximately 70-90° C. (158° F.-194° F.).

### Claim 7

A method for producing an edible filament for use in a 3D printer, comprising the steps of:
obtaining an active ingredient comprising any one from among a group consisting of an essential oil, powdered alcohol and nicotine;
preparing a water soluble polymer compound by mixing approximately 1 part said active ingredient with approximately 3.5 parts polyvinylpyrrolidone (PVP), approximately 1.5 parts starch, and approximately 1 part super disintegrant;
spray drying said water soluble polymer compound to a powderized form;
mixing and heating said powderized water soluble polymer compound with any one or more excipient ingredients from among the group consisting of a plasticizer, arabic gum, a gelling agent, a filler, flour, a binding agent, a thickening agent, a lubricant, and a preservative, to form a hardened edible thermoplastic;
hot-melt extruding said edible thermoplastic through a die to produce a filament; and
winding said filament on a spool.

### Claim 8 (depends on 7)

The method of claim 7, wherein said active ingredient comprises edible cannabis oil.

### Claim 9 (depends on 7)

The method of claim 7, wherein said step of obtaining said active ingredient further comprises the substeps of,
obtaining dried plant material, and performing an extraction on said dried plant material to produce said essential oil therefrom.

### Claim 10 (depends on 9)

The method of claim 9, wherein said substep of obtaining dried plant comprises obtaining dried cannabis flowers.

### Claim 11 (depends on 10)

The method of claim 10, wherein said step of performing an extraction on said dried cannabis flowers comprises extracting edible cannabis oil there from.

### Claim 12 (depends on 7)

The method of claim 7, wherein said step of hot-melt extruding said edible thermoplastic comprises extruding through a die having a 1.75 mm diameter.

### Claim 13 (depends on 7)

The method of claim 7, wherein said step of hot-melt extruding said edible thermoplastic comprises extruding through a die having a 3 mm diameter.

### Claim 14 (depends on 7)

The method of claim 7, wherein said step of hot-melt extruding said edible thermoplastic comprises extruding through a die at a temperature within a range from approximately 70-90° C. (158-194° F.).

### Claim 15 (depends on 7)

The method of claim 7, wherein said step of mixing and heating said powderized water soluble, polymer compound comprises mixing with all excipient ingredients including a plasticizer, arabic gum, a gelling agent, a filler, flour, a binding agent, a thickening agent, a lubricant, and a preservative, to form a hardened edible thermoplastic.