Guillaume Montaclair

Title: Guillaume Montaclair and Printer Calibration Innovation.

Introduction

Guillaume Montaclair is an inventor associated with Hewlett-Packard Company. His patent work addresses a precise challenge in incremental printing: reducing residual dot-placement errors caused by imperfections in the guide rod that supports a printhead carriage.

Latest Patents

Montaclair is associated with 1 patent, titled “Controlling Residual Fine Errors of Dot Placement in an Incremental Printer.” The invention uses stored calibration data to compensate for guide-rod deviations that can affect the alignment of marks printed by different printheads. Because printheads and the carriage encoder may sit at different distances from the rod, its deviations can produce dot-placement errors that vary along the carriage’s path.

The patent describes several ways to apply corrections. A system may store a single offset based on measurements of the rod’s straightness, use successive offsets as the carriage moves, or apply a continuous corrective function. It may also store separate offsets for pairs of adjacent printheads. Calibration data can be held in digital memory or implemented through alternatives such as a mechanical cam, an analog circuit, polynomial coefficients, or a specially graduated codestrip.

Calibration may be developed by measuring rod deviations and calculating the expected errors between marks made by different printheads. One preferred approach has the printer produce test patterns, which an internal sensor then measures. The resulting data can be used to adjust printhead alignment, carriage position or speed, actuation timing, or image and color-plane alignment.

Career Highlights

The patent reflects Montaclair’s contribution to improving print accuracy through calibration and error compensation. Its methods are designed to address variations along the guide rod, including cases where alignment has been set using only a limited section of the rod.

Collaborations

Montaclair is associated with Hewlett-Packard Company. His listed coworkers include Francisco-Javier Pozuelo and Miquel Boleda.

Conclusion

Guillaume Montaclair’s patent describes practical calibration techniques for reducing dot-placement errors and improving alignment in incremental printers.