Stack comprising W-Z folded sheets
US6168848A · kind A · utility
36Cited by
15References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1999 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Oct 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24264
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A stack of folded sheets includes right and left W folded sheets and right and left Z folded sheets which are arranged and interfolded so that the stack is balanced and has uniform bulk across its width. Withdrawal of the top sheet of the stack lifts the next sheet into position for withdrawal. The W and Z folded sheets advantageously have a maximum width of 120 mm, an overlap of about 40 mm, and a sheet width of up to 340 mm. Narrower stacks of W and Z folded sheets have folded widths of 100 mm or 75 mm and sheet widths of 292 mm or 215 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.