Apparatus for conveying sheets
US4856769A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Nov 9, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S271/901
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A conveyor surface composed of a single belt, a plurality of belts or of other structures such as a plurality of panels or other moving surface, or a fixed surface over which sheets of non-conductive material as paper or textiles can be caused to travel or can slide. The surface is composed of two sets of areas, intermingled in one of several ways, the two sets of areas being of material of opposite electrostatic properties (spaced apart on the triboelectric scale) so that when a sheet is conveyed the two sets of areas develop opposite electrostatic reaction to the sheet to give an overall zero or near-zero electrostatic resultant force on the sheet or other item being conveyed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.