Method and apparatus for quieting the operation of a dot matrix printer
US4758103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Apr 15, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/111
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for quieting the operation of a dot matrix printer by logically dividing the data to be printed among timed spaced printing passes is disclosed. A matrix of data to be printed is stored in a memory. A slice of data is selected from the stored data and the number of dots to be printed simultaneously is reduced by logically allocating the data in each slice among complementary submatrices. Each submatrix of data is printed substantially aligned with each other submatrix in two passes of the print head across the print medium to represent the entire selected slice of data. Noise reduction is achieved by reducing the number of data dots simultaneously printed at each print location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.