Web cutting apparatus
US5934043A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1995 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Jun 23, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S83/956
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Transverse cuts are made in a web using a cutter/anvil combination which is subjected to high frequency vibration, preferable ultrasound. In one arrangement, particularly for cutting tea bag webs, a rotary cutter drum (4) cooperates with an ultrasonically-vibrated anvil 12. The web may be simultaneously sealed and cut by means of a modified drum (202) having sealer/cutter elements (208, 210). In other arrangements, particularly for cutting cork paper on a machine for assembling filter cigarettes, the paper is severed on a drum (106, 122, 192, 350) cooperating with an ultrasonically-vibrated anvil (110, 194, 312) or directly on an ultrasonically-vibrated drum (144, 160, 170, 180).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.