Electronically controlled printer system
US4192619A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1976 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Jan 19, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J7/94
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printer has a print shell on which are disposed type characters in a two dimensional array with the shell controllably movable in two degrees of freedom to selectively position each type character opposite a record-medium-carrying platen for printing. In addition, during printing the shell is driven against the platen with a force related to the particular character being printed, and associated with the printing is an indexing or transverse spacing of the print shell to expose new portions of the record medium for printing. As each character is to be printed, a coded combination of signals associated with such character is translated and converted to four further signals wherein two of which control the movement of the print shell in the two axes of freedom to select the desired type character for printing while a third signal controls the velocity at which the print shell is driven against the platen to insure uniform shading of the print regardless of the impact surface of the character and the fourth signal controls the amount of transverse spacing to provide proportional as well as monospacing of the printed characters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.