Method and apparatus for slitting and scoring corrugated paperboard sheets for folding
US5690601A · kind A · utility
38Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jun 10, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/6489
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Corrugated paperboard box blanks are formed with corner fold lines defined by a colinear slit and score. The score deflects one slit edge of the liner out of the plane of the blank such that, when a subsequent lateral fold is made on the line, one slit edge tucks consistently under the other along the full length of the fold line. The resultant box blanks fold more squarely than prior art folded boxes with no significant loss in the compressive strength of the box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.