# US 7,610,852 B2 · Method of making a bale of cellulose acetate tow

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- Number: US 7,610,852 B2
- Document ID: US7610852B2
- Status: Granted
- Kind: B2
- Application number: 12/340,881
- Filed: 2008-12-22
- Published: 2009-04-23
- Granted: 2009-11-03
- Earliest claimed: 2007-03-05
- Assignees: Celanese Acetate LLC
- Inventors: Christopher M. Bundren; Ronald F. Hughes
- Web page: https://patentgrep.com/patent/US7610852B2

## CPC

- B65B 27/125: {and wrapping or bagging}
- B30B 9/3021: {Press rams}
- B65B 63/02: for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles
- B65B: MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING (bundling and pressing devices for cigars A24C1/44; devices for tensioning and securing binders adapted to be supported by the article or articles to be bound B25B25/00; applying closure members to bottles, jars or similar containers B67B1/00-B67B6/00; concurrent cleaning, filling and closing of bottles B67C7/00; emptying bottles, jars, cans, casks, barrels or similar containers B67C9/00)
- B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)}

## Abstract

A method for baling a cellulose acetate tow is disclosed. The method includes the following steps: laying the cellulose acetate tow into a can; pressing the laid tow with a press having a first platen and a second platen, each platen facing each other, each platen having a contoured face, the contoured face having at least three sloped portions, a first sloped portion located adjacent a peripheral edge of the platen having a first slope, a second sloped portion located adjacent the first sloped portion having a second slope, and a third sloped portion located adjacent the second sloped portion having a third slope, wherein the first slope is greater that the second slope, and the second slope is greater that the third slope; and packaging and securing the pressed tow; whereby the pressed tow having substantially flat surfaces.

## Claims

### Claim 1

A method for baling a cellulose acetate tow comprising the steps of:
laying the cellulose acetate tow into a can,
pressing the laid tow with a press having a first platen and a second platen, each platen facing each other, each of the platens having a pyramid shape where each side of the pyramid being a contoured face, each of the contoured faces having at least two linear sloped portions, a first linear sloped portion located adjacent a peripheral edge of the platen having a first slope, and a second linear sloped portion located adjacent the first sloped portion having a second slope, wherein the first slope being in a range of 5° to 40°, the second slope being in a range of 5° to 20°, and the first slope is greater than the second slope, and
packaging and securing the pressed tow,
whereby the pressed tow having substantially flat surfaces.

### Claim 2 (depends on 1)

The method according to claim 1 wherein each said platen being free of air exhaust holes.

### Claim 3 (depends on 1)

The method according to claim 1 wherein a height of each platen being greater than 3 inches (7.6 cm).

### Claim 4 (depends on 1)

The method according to claim 1 wherein pressing is for a period in the range of 0.1 to 5 minutes.

### Claim 5 (depends on 1)

The method according to claim 1 wherein each said platen being made of a material being selected from the group consisting of wood, synthetic material, or a metal.

### Claim 6

A method for baling a cellulose acetate tow comprising the steps of:
laying the cellulose acetate tow into a can;
pressing the laid tow with a press having a first platen and a second platen, each of said platens facing each other, each of the platens having a pyramid shape where each side of the pyramid being a contoured face, each of the contoured faces having at least two sloped portions, a first linear sloped portion located adjacent a peripheral edge of the platen having a first slope, and a second linear sloped portion located adjacent the first sloped portion having a second slope, wherein the first slope being in a range of 5° to 40°, the second slope being in a range of 5° to 20°, and the first slope is greater than the second slope, each platen being free of air exhaust holes, and a pressing time ranging from 0.1 to 5 minutes; and
packaging and securing the pressed tow,
whereby the pressed tow having substantially flat surfaces.

### Claim 7 (depends on 6)

The method according to claim 6 wherein a height of each platen being in the range of 3 to 5 inches.

### Claim 8 (depends on 6)

The method according to claim 6 wherein each said platen being made of a material being selected from the group consisting of wood, synthetic material, or a metal.