Back to results
US 4,433,902 AGranted
Projection printer
AssigneeNCR Corporation
InventorsMiroslav S. Osmera, Ralf M. Brooks, Sung-Soon Kim
Life of this patent
Estimating the term…
Abstract
A non-impact printing method wherein pulsed light is transmitted through a mask containing enlarged characters. The characters are optically reduced and are focused on a document in back of a heat-sensitive or thermal magnetic ink ribbon. Heat energy projected by the pulsed light causes ink transfer from the ribbon onto the paper.
Claims2
A projection printer comprising a
- plurality of thermal energy light elements arranged in arcuate manner,
- printing paper spaced from said plurality of light elements and movable along a line of printing, a
- plurality of masks each associated with and disposed in like arcuate manner as each of said light elements and including an enlarged aperture representing a character to be printed, a
- plurality of projection lenses each associated with and positioned in like arcuate manner as each of said light elements and each of said masks to receive images of characters and to reduce said images prior to printing, and a
- ribbon having thermal sensitive ink material thereon and movable with said printing paper and positioned in contact therewith for transferring said ink material thereto upon pulsing of said light elements to act on said ribbon by heating said ink material in the shape of apertures in said masks for printing of characters on said printing paper.
2 more elements
Apparatus for non-impact printing on record paper movable along a line of printing, comprising a
- plurality of thermal energy light elements arranged in a pattern of arcuate shape, a
- plurality of character masks spaced from and arranged in a similar pattern as said light elements and each mask having an aperture representing a character to be printed, a
- plurality of projection lenses arranged in a similar pattern as each of said light elements and each of said masks to receive images of characters projected through the apertures of said masks, and a
- ribbon movable with said record paper and positioned in contact therewith and having heat sensitive ink thereon responsive to said light elements for transferring ink to said record paper by heating said ink in the shape of apertures in said masks when said light elements are energized to cause images of characters to be projected toward and onto said record paper.
1 more element
Dependencies are inferred from the claim text.