Other

Maxtor Corporation

Peter D Butler

Maxwell H Corbin, Jr

Rosser S Wilson

Apparatus for detecting data track misregistration is described. The present invention involves the interaction of a microprocessor with a demodulator. Microcode within the microprocessor initiates a misregistration scan of all data tracks at specific intervals to generate a calibration offset table that is used to direct the heads during the subsequent interval. A demodulator obtains the peak values of calibration servo bursts, displaced one-half of the track width to either side of a track, and outputs a timing pulse proportional to their respective peak voltage values. A timer within the microprocessor extracts the time values, and the misregistration displacement is calculated by the comparison of the inner burst and outer burst time values. The calculated displacement is used in the offset table for subsequent disk references.

Method and apparatus for detecting data track misregistration

A method of removing pavement marking materials on an asphalt surface which comprises heating the surface of the asphalt roadway in which the pavement marking materials have been installed to a temperature just below that at which the pavement marking materials will liquify using an infrared heater and then cooling the pavement marking materials to a temperature below about 100.degree. F. and then peeling off the pavement marking materials from the asphalt surface.

Method of removing pavement marking materials from asphalt surfaces

A method of installing preformed pavement marking materials on an asphalt surface involving using infrared heat to raise the temperature of the surface so that the asphalt is sufficiently softened so that preformed pavement marking materials may be pressed into said asphalt surface.

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Columbus, OH, United States of America

Peter D Butler