Multiple speed printer
US4439775A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0074
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dot matrix printer has a dot generator which projects dots through a dot selector and dot deflector towards a recording medium. Dots used for printing are selectively charged by the dot selector and deflected vertically by the dot deflector for printing on the recording medium. The dot generator moves horizontally at a speed S across the recording medium. Dots not used for printing are not charged, not deflected, and are collected in a gutter. A data input designates to the dot selector the character to be printed. A speed selector is operable to select standard speed printing S.sub.1, or high-speed printing S.sub.2. Speed S.sub.2 is equal to some factor Z multiplied by standard speed S.sub.1. If the standard speed printing is selected, the dot selector accesses the standard speed character matrix memory and receives dot position information corresponding to the designated character. The dot position information comprises X adjacent and parallel vertical scans, each scan comprising a column of Y potential dot, or matrix, positions. The dot selector codes each sequential dot with the position information for the next sequential matrix position of the scan. If high-speed printing S…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.