Optical sensor system to calibrate a printhead servicing locatio

Details Optical sensor system to calibrate a printhead servicing locatio Optical sensor system to calibrate a printhead servicing locatio

1998-02-26

2000-12-26

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 19, 347 37, B41J 2165, B41J 29393

Patent

active

061647535

ABSTRACT:
A method and apparatus are provided for aligning the printer carriage of an inkjet printer with a service station of the printer where for example capping, wiping or spitting of inkjet cartridges held by the printer carriage can be performed. The method utilizes an optical sensor mounted on the printer carriage to scan a reference mark within the service area. Preferably the reference mark exhibits a change in reflectance in the scanning direction of the printer carriage and is mounted on a service station carriage which also holds removable service modules. An embodiment employs an iterative method in which calibration steps are interspersed by capping operations so as to ensure accurate alignment is achieved.

REFERENCES:
patent: 4686540 (1987-08-01), Leslie et al.
patent: 4728970 (1988-03-01), Terasawa
patent: 4791435 (1988-12-01), Smith et al.
patent: 5796414 (1998-08-01), Sievert et al.

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