Slitting shingled sheets
US5165314A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/8794
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for longitudinally slitting a continuously moving shingle of sheets of corrugated paperboard includes a thin, circular rotary slitting blade cooperating with a lower roller assembly which supports the underside of the moving shingle and provides a firm surface to support the shingle against the upper rotating slitting blade. The roller assembly includes an annular circumferential slot in its outer surface through which an edge portion of the upper cutting blade travels with the shingle firmly supported by the roller surfaces on each side of the slot. In an embodiment of the invention for slitting a shingle of preformed knocked down boxes, the lateral edges of the advancing shingle are aligned and the shingle is held for movement into the slitting blade, resulting in extremely good registration and slit quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.