Method of manufacturing water-soluble unit dose articles comprising water-soluble fibrous structures

Patent metadata

Field	Value
Publication number	US-12173256-B2
Application number	US-202117493895-A
Country	US
Kind code	B2
Filing date	Oct 5, 2021
Priority date	Oct 16, 2020
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

Described herein is a method for making fibrous water-soluble unit doses utilizing a repeating nested pattern.

First claim

What is claimed is:

1. A method for making fibrous water-soluble unit doses, the method comprising:
a. delivering a fibrous web material, wherein the fibrous web material is delivered in the form of a continuous strip of fibrous web material;
b. cutting the fibrous web material in a cross-direction to form a repeating nested pattern of cross-directional and generally identically shaped fibrous water-soluble unit doses;
wherein the fibrous water-soluble unit doses are nested and form a repeating pattern of cross-directional and identically shaped fibrous water-soluble unit doses, wherein each fibrous water-soluble unit doses is symmetric along a centerline axis of each fibrous water-soluble unit dose that lies along an angle to the longitudinal axis of the strip of fibrous web material, and
wherein the step of cutting the fibrous web material wastes less than about 20% of the fibrous web material.

2. The method of claim 1 , wherein the fibrous water-soluble unit doses are not symmetric along the centerline of each fibrous water-soluble unit dose parallel to the longitudinal edge of the strip of fibrous web material.

3. The method of claim 1 , wherein the fibrous water-soluble unit doses are longitudinally asymmetric along the strip of fibrous web material from which they are cut.

4. The method of claim 1 , wherein the fibrous web material is delivered from a supply roll.

5. The method of claim 1 , wherein the fibrous water-soluble unit doses are nested in that they form a repeating pattern along the cross section of the strip of fibrous web material while not being symmetric along the centerline of each fibrous water-soluble unit dose parallel to the longitudinal edge of the strip.

6. The method of claim 1 , wherein adjacent fibrous water-soluble unit doses share common defining cut lines.

7. The method of claim 1 , wherein, the fibrous water-soluble unit doses comprise an upper nub and a lower nub.

8. The method of claim 1 , wherein the fibrous water-soluble unit dose comprises one or more nubs.

9. The method of claim 8 , wherein the one or more nubs are integral to the shape of the water-soluble unit does and are delineated by one or more perforations.

Assignees

• Procter & Gamble

Inventors

• Sivik Mark Robert
• Denome Frank William
• Sanders Michael David

Classifications

• C11D2111/12

  Soft surfaces, e.g. textile · CPC title

• D10B2503/00

  Domestic or personal · CPC title

• D10B2401/024

  soluble · CPC title

• D06H7/02

  transversely (D06H7/14 takes precedence) · CPC title

• D04H1/413

  containing granules other than absorbent substances · CPC title