作者: Gary C. Weber , Paul F. Scott , Timothy W. Shay , Mark P. Claypool
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摘要: Apparatus for reading code elements which are relieved from a container. A source of light projects normally at the while container is rotated to sequentially illuminate each elements. sensor receives reflected approximately normal surface but avoids element an appreciable angle relative normal. The intensity reflections regions said not containing relatively large compared received portions and threshold set therebetween.