Compensating for variations in article speeds and characteristics at different article positions during article irradiation
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United States of America Patent
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Jul 19, 2005
Grant Date -
Nov 4, 2004
app pub date -
May 2, 2003
filing date -
May 2, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
First embodiment: an article is conveyed in a first direction at different speeds at different positions on the article in a second direction substantially perpendicular to the first direction. For example, when the article is conveyed in a rotary direction, the positions on the radially outer side of the article rotate at higher speeds than the positions at the radially inner side of the article. Radiant energy directed against the conveyed article is scanned on a cyclic basis in the second direction between the radially inner and outer sides of the article. During the scanning, the intensity of the radiant energy is varied at each position in the second direction to direct a constant intensity of radiant energy against the article at every position in the article. Second embodiment: the article scanning in the second direction is varied according to the article characteristics (e.g. thickness) in the second direction.
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