# US 11,306,440 B2 · Methods and apparatus for manufacturing fiber-based meat containers

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- Number: US 11,306,440 B2
- Document ID: US11306440B2
- Status: Granted
- Kind: B2
- Application number: 16/457,897
- Filed: 2019-06-28
- Published: 2020-12-31
- Granted: 2022-04-19
- Earliest claimed: 2019-06-28
- Assignees: Footprint International, LLC
- Applicants: Footprint International, LLC
- Inventors: Yoke Dou Chung; Brandon Michael Moore; Yiyun Zhang
- Web page: https://patentgrep.com/patent/US11306440B2

## CPC

- D21H 17/17: Ketenes, e.g. ketene dimers
- D21H 21/18: Reinforcing agents
- B29C 41/50: Shaping under special conditions, e.g. vacuum
- B65D 1/22: Boxes or like containers with side walls of substantial depth for enclosing contents {(B65D43/162, B65D81/02, B65D81/3813 take precedence)}
- B65D 1/34: Trays or like shallow containers {(B65D81/3813 takes precedence)}
- B65D 1/36: with moulded compartments or partitions
- B65D 1/42: Reinforcing or strengthening parts or members
- B65D 43/0212: {only on the outside, or a part turned to the outside, of the mouth (B65D43/0206 takes precedence)}
- B65D 81/3453: {Rigid containers, e.g. trays, bottles, boxes, cups}
- B65D 85/34: for fruit, e.g. apples, oranges or tomatoes
- D21H 17/29: cationic
- D21H 21/10: Retention agents or drainage improvers
- D21H 21/16: Sizing or water-repelling agents
- B65D 2543/00046: Drinking-through lids
- B65D 2543/00092: circular
- B65D 2543/00268: Paper
- B65D 2543/00537: on the outside, or a part turned to the outside of the mouth of the container
- B65D 2543/00731: Groove or hollow bead
- B65D 2543/00796: Totality
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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)
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

Methods and apparatus for vacuum forming a meat tray using a slurry. The slurry comprises: a moisture barrier comprising AKD in the range of about 4% by weight; a fiber base comprising bagasse; and an oil barrier comprising a water-based emulsion in the range of about 1.5% by weight.

## Claims

### Claim 1

A fiber-based slurry for use in vacuum forming a food tray, the slurry comprising:
a fiber base comprising 50% to 95% old corrugated containers (OCC);
a moisture barrier; and
an oil barrier;
wherein the moisture barrier is in a range of about 1%-4% by weight and the oil barrier is in a range of about 1%-4% by weight.

### Claim 2 (depends on 1)

The slurry of claim 1, further comprising a strength additive in a range of 1.5%-4% by weight.

### Claim 3 (depends on 1)

The slurry of claim 1, wherein the moisture barrier is about 4% by weight.

### Claim 4 (depends on 1)

The slurry of claim 1, wherein the oil barrier is about 1.5% by weight.

### Claim 5 (depends on 1)

The slurry of claim 1, wherein the moisture barrier comprises alkyl ketene dimer (AKD).

### Claim 6 (depends on 1)

The slurry of claim 1, wherein the oil barrier comprises a water-based emulsion.

### Claim 7

A fiber-based slurry for use in vacuum forming a food tray, the slurry comprising:
0.5% to 30%: newsprint (NP);
a moisture barrier; and
an oil barrier;
wherein the moisture barrier is in a range of about 1%-4% by weight and the oil barrier is in a range of about 1%-4% by weight.

### Claim 8 (depends on 7)

The slurry of claim 7, further comprising a strength additive in a range of 1.5%-4% by weight.

### Claim 9 (depends on 7)

The slurry of claim 7, wherein the moisture barrier is about 4% by weight and the oil barrier is about 1.5% by weight.

### Claim 10 (depends on 7)

The slurry of claim 7, wherein the moisture barrier comprises alkyl ketene dimer (AKD) and the oil barrier comprises a water-based emulsion.