Grounding device for rotary electrical printer and method
US4176364A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1978 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Mar 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The printer records images in the form of dots on electrical discharge-sensitive paper which has a conductive coating on one surface. A plurality of styli are mounted on a rotor. The paper is fed continuously through a curved guide in a direction perpendicular to the plane of rotation of the rotor. This divisional patent is directed to the feature whereby current is supplied to the styli from a power supply through the conductive coating on the paper. The return path to the power supply is made by means of a simple brush consisting of a curved, helical spring. The spring makes good electrical contact and also serves to help shape the paper into an arc before it passes over the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.