Method and device for electrostatic charging
US6445562B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2404/1451
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention is a device which electrostatically charges external sides of at least one moving web. The invention includes a pair of rollers, each roller having an outer coating of limited electrical conductivity and an inner core in contact with the outer coating with the outer coating of each roller being spaced apart to define a gap through which the at least one moving web passes so that the outer coating of each roller contacts one of the external sides of the at least one web to transfer electrical charge from the outer surface coating to the moving web; and a high voltage power supply which applies electrical charge to the outer coating with one polarity of the power supply being grounded and electrically connected to a part of the core and another polarity of the power supply being electrically connected to a corona charging electrode which transfers the electrical charge to the outer coating of each roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.