Appeal No. 2007-0464
Application 09/964,874
20. Kulakowski discloses an optical disk drive in which a sensor measures the
operating temperature of the device and the measured temperature is compared with two
threshold values. (Kulakowski, Column 2, Line 63 through Column 3, Line 9.)
21. Kulakowski discloses that if the measured temperature exceeds a first threshold
temperature, a microprocessor dynamically adjusts the duty cycle of the disk drive by inhibiting
high temperature write and erase operations. (Kulakowski, Column 2, Line 66 through Column
3, Line 3.) And if the measured temperature exceeds the second threshold temperature, a control
circuit further inhibits read and verify operations as well. (Kulakowski, Column 3, Lines 3-5.)
Kulakowski discloses that as a consequence of these inhibitions the temperature of the disk drive
can be controlled to stay within a predetermined range and the system provides a way to address
the heat generation problem associated with computer peripheral equipment. (Kulakowski,
Column 3, Lines 5-7 and Lines 17-19.)
22. Kulakowski does not disclose changing or modifying the focus or tracking offset
value of the optical disk drive at any time. It is just concerned with maintaining the operating
temperature of the disk drive to within predetermined parameters which may be controlled by a
user through a host computer. (Kulakowski, Column 3, Lines 5-8; Column 5, Lines 15-18.)
23. Tsutsui discloses that temperature changes in an optical disk drive may vary the
necessary offset in the focus and tracking offset servo signals. (Tsutsui, Column 1, Lines 38-46.)
24. Tsutsui discloses continual adjustment of the servo offset to an optimal value
during operation of the optical disk drive, whenever the quantity of stored data supplied by a
reproducing means exceeds the quantity of recorded data corresponding to one rotation of the
optical disk. (Tsutsui, Column 1, Line 64 through Column 2, Line 19.) Because of the continual
adjustment of the servo offset, based on the quantity of data reproduced as compared to the
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