Appeal No. 2001-1342
Application 08/994,821
reflected light from bar code 21 and detector 45 senses the
emitted light from bar code 31. See column 6, line 66, through
column 7, line 12. Berson does not disclose or teach or even
suggest that visible light source 40 is alternately energized
with ultraviolet source 41 as claimed by Appellants.
Berson discloses a second embodiment in figure 3. Berson
discloses that figure 3 shows a lower layer indicia is printed on
an object with a normal ink and an upper layer indicia is printed
above the lower layer-indicia with an invisible ink. The
information contained in the lower layer indicia may be read by
utilizing light source 51 emitting visible light. Detector 54
senses the reflected light from the lower indicia. The
information contained in the indicia 65 may be read by utilizing
ultra violet light source 52. Detector 45 senses the emitted
light from indicia 65. See column 7, lines 13 through 38. From
these teachings, Berson teaches that the reading of the indicia
operates similar to the first embodiment in that there is no
alternating between light sources.
Berson does disclose that if light source 51 and 52 and
detector 54 and 55 are periodically turned on and off
approximately 16 times a second by switching mechanism 56, the
eagle portion of the indicia will look like it is moving. See
11
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