Web cutting machine, particularly for severing printed paper webs received from a printing machine
US5036737A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1990 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | May 24, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/6472
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
To direct the leading edge of a cut web element, cut by knives (3) on a cutter cylinder pair (1, 2), to an inlet region of transport belts (6, 7) running over deflection rollers (8, 9), air jet nozzles (10, 11) direct an air cushion or air pillow into the nip between the cylinders (1, 2). The cylinders are formed with a plurality of circumferential grooves (18, 19) or a spiral groove (21), so that the air can pass along the nip and continue to guide the cut leading edge of the web. Suction nozzles 22, 23 enhance the air cushion effect applied to both sides of the web. If the web is a multi-ply structure, the air cushion or air pillow additionally contributes to adhesion of the various plies against each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.