Abstract: This invention is directed to an automated measuring device capable of measuring the thickness of essentially any shaped article generally of any materials that is non magnetic. The measuring device of this invention comprises in combination (1) electrical controlling means, (2) magnetic thickness measuring means, (3) mounting means for mounting the article to be measured, (4) computer means for programming the measuring means for measurement of the thickness at predetermined points on the article and (5) means for collecting and recording thickness measurements. Electrical controlling means are employed to control movement of the article to be measured or controlling movement of the magnetic measuring means or a combination of both. The magnetic measuring means comprise a magnetic probe and a magnetic metal ball such that when in a measuring mode, the tip of the magnetic probe is positioned on the side of the article opposite from the magnetic ball and is in magnetic contact through the article.

Abstract: Multilayered containers comprising polycarbonate layers and amorphous polyamide layers wherein the amorphous polyamides are modified and unmodified amorphous polyamides of high glass transition temperatures. The containers have improved stress craze/crack resistance and improved rewashing properties. The containers are useful for carbonated beverages and are rewashable and refillable at elevated temperatures.

Abstract: A blow molded plastic bottle has a reinforced plastic bottom with a concave central portion and a bottom rim portion. A solid depending rib, formed at the pinch off seam, extends across the concave portion, and depending hollow ribs, formed in the concave portion at ninety degress to the solid rib, extend radially to the bottom rim portion. The hollow rims effectively reduce the depth of the bottom rim intermediate the seam junctions to reduce bulging of the concave base thereby preventing instability.