High speed, low-cost character printer
US4378149A · kind A · utility
Inventor
Key dates
| Filing date | Dec 5, 1980 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | Dec 5, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A light-weight print head having an array of LED light emitting elements positioned adjacent an apertured mask is employed to photographically record at very high speeds characters having high resolution so that they are suitable for phototypesetting. The light transmitting apertures have a cross-sectional area substantially smaller than the cross-sectional area of the LEDs and since the apertures may be very accurately positioned with respect to each other, high character resolutions are obtainable despite misalignment between the mask and the array of LEDs. A flat, lightweight, flexible ribbon of conductors is coupled between the moving scanning head and a stationary source of electrical signals. An electrically insulating, opaque filler may advantageously be employed between the LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.