Title:
SERRATED SCREENS FOR FORMING APERTURED THREE-DIMENSIONAL SHEET MATERIALS
Document Type and Number:
WIPO Patent Application WO2001003895
Kind Code:
A3
Abstract:
The present invention provides a forming structure (111) comprising a screen having a plurality of apertures (20). The apertures (20) each have a periphery (25), and each of the apertures has at least one protrusion (30) extending inwardly from the periphery (25). The protrusions (30) preferably extend inwardly to at least one apex (35), which may be sharp or have a finite radius. The forming structures (111) may be utilized in a multi-phase forming process to form three-dimensional, macroscopically-expanded apertured film materials.
Inventors:
O'DONNELL HUGH JOSEPH
LEE YANN-PER
LEE YANN-PER
Application Number:
PCT/US2000/017935
Publication Date:
November 01, 2001
Filing Date:
June 29, 2000
Export Citation:
Assignee:
PROCTER & GAMBLE (US)
International Classes:
A61F13/15; B26F1/26; B29C59/02; B29C59/06; (IPC1-7): B26F1/26; A61F13/15
Domestic Patent References:
| WO1992000050A1 | 1992-01-09 |
Foreign References:
| FR2722400A1 | 1996-01-19 | |||
| US5718928A | 1998-02-17 | |||
| EP0203820A2 | 1986-12-03 | |||
| EP0018684A1 | 1980-11-12 | |||
| US3979494A | 1976-09-07 | |||
| EP0057484A2 | 1982-08-11 | |||
| JPS4514198B1 |
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