Plastic container and method of manufacturing the same

Claim 1

A container manufactured in one piece by means of injection moulding and having at least one indication of fracture with a molecule orientation deviating from that of the rest of the container, wherein said indication of fracture divides said container into an upper part and a lower part and comprises a substantially annular central flange encircling said container, radially spaced integrally formed connecting parts connecting said central flange to an inner wall of said upper part and an outer wall of said lower part, the parts connecting said central flange to said upper part being radially spaced from the parts connecting said central flange to the lower part, said connecting parts having the molecules therein oriented substantially perpendicular to the molecules of the central flange near the points of connection, said central flange at every point between said spaced connecting parts being integrally connected to said upper and lower parts by arcuate portions which are relatively thinner than said connecting parts whereby in the manufacture of the container the connecting parts provide a forced alternation of the flow direction of the plastic mass in the flange.