Method and apparatus for making prefastened and refastenable pant with desired waist and hip fit

• US 6,846,374 B2
• Filed: 04/05/2001
• Issued: 01/25/2005
• Est. Priority Date: 05/16/2000
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Popp, Robert Lee, Olson, Christopher Peter, Kuen, David Arthur, Quereshi, Shawn Ahmed, Coenen, Joseph Daniel
• Primary Examiner(s): Aftergut, Jeff H.
• Application Number:
  US09/827,192
• Publication Number:
  US 20020173767A1
• Time in Patent Office: 1,391 Days
• Field of Search: 156/227, 156/85, 156/161, 156/163, 156/164, 156/229
• US Class Current: 156/85
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/15593 having elastic ribbons fixed thereto; Devices for applying the ribbons
• CPC Class Codes: A61F 13/49011 the elastic means is located at the waist region
• CPC Class Codes: Y10T 156/1051 by folding

Abstract

A process for making a prefastened and refastenable pant includes providing a plurality of discrete articles having side panels and waist regions including an activatable retractive material. The side panels can be folded parallel to a longitudinal centerline to overlap at least portions of first and second fastening components. The fastening components are then engaged to form a prefastened and refastenable pant. The retractive material can be activated subsequent to engagement of the fastening components, or subsequent to obtaining position control of the side panels, to provide the pant with a waistband-to-hip circumference ratio of about 95 percent or less. The prefastened and refastenable pant and apparatus for its manufacture are also disclosed.

Claims

1. A process for making a prefastened and refastenable pant, comprising;

providing a plurality of discrete articles, each article having first and second waist regions, a crotch region interconnecting the waist regions, a longitudinal centerline, first and second fastening components disposed in the first and second waist regions respectively and adapted to refastenably engage one another, the first waist region having opposed side panels;

providing an activatable retractive material in at least one of the waist regions;

folding each article through the crotch region;

folding the opposed side panels to overlap at least portions of the first and second fastening components;

engaging the first and second fastening components; and

activating at least a portion of the refractive material causing the retractive material to retract subsequent to engagement of the fastening components, wherein activating the refractive material provides a waistband-to-hip circumference ratio of about 95 percent or less at a 70 gram loading and a waistband-to-hip circumference ratio of about 100 percent at a 2000 gram loading.

2. The process of claim 1, wherein activating the refractive material comprises applying electromagnetic radiation.

3. The process of claim 1, wherein activating the refractive material comprises applying heat.

4. The process of claim 3, wherein applying heat comprises applying a volume of heated air and a greater volume of heated air is applied to a waistband as compared to a hip section.

5. The process of claim 3, wherein applying heat comprises applying an air flow and a higher temperature air flow is applied to a waistband as compared to a hip section.

6. The process of claim 1, further comprising temporarily maintaining the retractive material in an extended and unstable state by application of a compaction force.

7. The process of claim 1, wherein activating the retractive material provides a waist-to-hip circumference ratio of about 90 percent or less.

8. The process of claim 7, wherein activating the retractive material provides a waistband-to-hip circumference ratio of about 75 to about 90 percent.

9. A process for making a prefastened and refastenable pant, comprising:

providing a plurality of discrete articles, each article having first and second waist regions, a crotch region interconnecting the waist regions, a longitudinal centerline, first and second fastening components disposed in the first and second waist regions respectively and adapted to refastenably engage one another, the first waist region having opposed side panels;

providing an activatable retractive material in at least one of the waist regions;

obtaining position control of the opposed side panels;

activating at least a portion of the retractive material causing retraction of the retractive material, wherein activating the retractive material provides a waistband-to-hip circumference ratio of about 95 percent or less at a 70 gram load and a waistband-to-hip circumference ratio of about 100 cement at a 2000 gram loading;

folding each article through the crotch region;

folding the opposed side panels to overlap at least portions of the first and second fastening components;

engaging the first and second fastening components; and

maintaining position control of the opposed side panels until the fastening components are engaged.

10. The process of claim 9, wherein activating the retractive material comprises applying electromagnetic radiation.

11. The process of claim 9, wherein activating the retractive material comprises applying heat.

12. The process of claim 9, further comprising temporarily maintaining the retractive material in an extended and unstable state by application of a compaction force.

13. The process of claim 9, wherein at least a portion of the retractive material is activated prior to engaging the first and second fastening components.

14. The process of claim 13, wherein at least a portion of the retractive material is activated prior to folding the opposed side panels.

15. The process of claim 9, wherein activating the retractive material provides a waistband-to-hip circumference ratio of about 90 percent or less.

16. The process of claim 15, wherein activating the retractive material provides a waistband-to-hip circumference ratio of about 75 to about 90 percent.