XY recorder
US4630071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1985 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Nov 5, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D9/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An XY recorder in which a recording paper is moved on a platen along the X axis in accordance with one variable and a stylus is moved along the Y axis in accordance with another variable, employs a controller to control the paper movement in several different modes. In a paper draw out mode, the paper is drawn out from a paper-feed roll pinched on the platen between pinch rollers and drive rollers, and during a time interval when the paper-feed roll exerts a backward tension to the paper, the paper is intermittently allowed to slip on the platen by disengaging the pinch rollers from the drive rollers. The tension to the paper backward from the paper-feed roll automatically aligns the paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.