Arrangement for transporting web-shaped materials to be scanned or exposed
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United States of America Patent
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May 9, 1995
Issued Date -
N/A
app pub date -
Jan 22, 1993
filing date -
Jul 7, 1990
priority date (Note) -
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Abstract
An arrangement for driving at least one roller of a roller unit for transporting web-shaped materials, such as X-ray sheet films or stimulatable phosphorous foils with substantially constant speed in a device for exposing or scanning these materials, the arrangement comprising a stepping motor having a motor output shaft, a friction drive having a drive input shaft, and a vibration damping mechanism provided between said motor output shaft and the drive input shaft. The drive is formed so that a ratio of the drive and a diameter of the roller is selected so that at least 20 steps of the stepping motor corresponds to a transporting path of the web-shaped material of one millimeter.
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