Glass test tube having protective outer shield
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United States of America Patent
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Issued Date -
Oct 19, 2006
app pub date -
May 13, 2005
filing date -
Apr 13, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An improved test tube with a glass inner surface, layer, or lining, and a protective outer shield (or layer) of a material that protects the test tube from accidental breakage. The protective shield may be of a color which indicates that it has breakage protection. In one embodiment, the protective shield is provided by plastic material which is coated or sprayed on the outer surface of the glass test tube. In another embodiment, the protective shield is provided by one or more layers of wrapped sheet material, such as polyester film. In a further embodiment, a glass tube is inserted into a plastic tube to provide such glass tube with breakage protection. The improved test tube is particularly useful in automatic analyzers that measure erythrocyte sedimentation rate.
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