Printer for recording on a moving medium
AssigneeEastman Kodak Company
InventorsScott MacKenzie, Nelson Blish
Life of this patent
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Abstract
A method for forming a pixel (20) having a predetermined density onto a sensitized recording medium moving in a length direction energizes a pixel exposure source (14) to begin exposure at the leading edge (34) of a pixel (20) and for a first predetermined time interval. The pixel exposure source (14) is de-energized for a period depending on the predetermined density and on media transport speed, then re-energized at the termination of the period. The pixel exposure source (14) is then de-energized at the end of a second predetermined time interval to terminate exposure at the trailing edge (36) of the pixel (20), whereby spatial dimensions of each pixel (20) are maintained at variable transport speed or density of pixel (20).
Claims7
An apparatus for forming a latent pixel pattern onto a moving photosensitive recording medium comprising:
- (a) a plurality of exposure sources arranged in an array;
- (b) transport mechanism for moving the medium past the plurality of exposure sources during exposure;
- (c) a speed sensing system for providing a positional signal related to the speed of the moving medium past the plurality of exposure sources;
- and
- (d) drive pulse control logic circuitry for modulating, for each exposure source in the plurality of exposure sources, a timing of drive signals to the exposure source according to the positional signal and according to pixel pattern data, such that a plurality of exposure pulses is provided for forming each pixel within the latent pixel pattern, such that each pixel formed onto the moving medium has substantially the same elongated dimension in the direction of media movement.
Dependencies are inferred from the claim text.