Multi-part sets of sheet material
US6180198A · kind A · utility
7Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1998 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Jan 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/15
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A multi-part set providing for so-called "carbonless" copying between parts of the set, comprises a piece of sheet material such as paper with respective portions of at least one face of the sheet being treated to provide for imaging therebetween when such portions lie in face to face relationship, the piece of material being folded to bring the treated portions into face to face relationship and being provided with at least one separation line. Two-part, three-part and four-part sets are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.