Multiple inkjet print cartridge alignment by scanning a referenc

Details Multiple inkjet print cartridge alignment by scanning a referenc Multiple inkjet print cartridge alignment by scanning a referenc

1995-10-11

1997-02-04

Barlow Jr., John E.

Incremental printing of symbolic information

Ink jet

Controller

347 37, B41J 29393

Patent

active

056003501

ABSTRACT:
An improved image registration system for a multicolor inkjet printer/plotter. The inventive system comprises a carriage assembly for retaining multiple inkjet cartridges. Each cartridge has a plurality of nozzles adapted to eject ink in response to the application of an electrical signal thereto. A first mechanism is provided for moving said carriage assembly means in a first axis. A second mechanism is provided for moving print media in a second axis transverse to the first axis, said first axis being a scan axis and said second axis being a media axis. A first position encoder senses the position of the carriage assembly in the first axis and a second position encoder senses the carriage assembly in the second axis and providing position encoder signals in response thereto. A control circuit provides electrical signals which cause the nozzles in the inkjet cartridges to eject ink onto the media and create an image thereon in response to timing signals. The inventive system includes a sensor module which optically senses the image and provides a set of sensed signals in response thereto. The sensed signals are processed to provide timing signals for use in correcting the image misregistration.

REFERENCES:
patent: 4349741 (1982-09-01), Bobart et al.
patent: 4533928 (1985-08-01), Sugiura et al.
patent: 4675696 (1987-06-01), Suzuki
patent: 4808832 (1989-02-01), Doggett
patent: 4878063 (1989-10-01), Katerberg
patent: 5216257 (1993-06-01), Brueck et al.
patent: 5250956 (1993-10-01), Haselby et al.

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