Appeal No. 2001-1773
Application No. 08/732,864 Page 8
which are equivalent to drop weight parameters. Secondly, the
examiner asserts (answer, page 5) that "Watrobski suggests a
printhead which has an information storage device for storing
information for identifying corresponding actual spot size due to
manufacturing tolerances. The actual spot size is directly
correlated to the actual drop weight ejected." Thus, the
examiner finds that Watrobski suggests an information storage
device for storing the actual drop weight of the printhead.
Thirdly, the examiner asserts that it is well within the skill of
one of ordinary skill in the art to either make the cartridge 60
integral with printhead 82 or to rearrange the information
storage device 76 into the printhead 82.
We find that Bullock discloses copiers, printers and
plotters that include a replaceable microprocessor that includes
an internal memory for storing usage, calibration and other data
(col. 1, lines 11-22). Thermal ink jet printheads employ a
heater resistor at each orifice for causing the ejection of ink
drops. The amount of current applied to a heater resistor to
achieve a desired ink drop volume is determined by a number of
factors and is the product of a calculated algorithm. Drop
volume is dependent upon sensed temperature, the ink's
characteristics, the structure of the ink orifice, etc. These
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