Parison and method for the production of plastic bottles
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United States of America Patent
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Jul 16, 2013
Grant Date -
Oct 29, 2009
app pub date -
Sep 15, 2006
filing date -
Sep 15, 2006
priority date (Note) -
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Abstract
A parison is described, as also is a method for the production of plastics bottles, in particular PET bottles, this having a rigid, substantially elongate body (2), which has a base (5) at one of its ends. At its opposite end, the body (2) of the parison (1) adjoins a neck section (3) which has been provided with a pouring aperture (6) and which is separated from the body (2) via a radially protruding, flange-like support ring (4), and which has a parison shoulder (A) below the support ring (4). The parison (1) has an external diameter of from 17.4 mm to 21.4 mm measured at the transition of the body (2) to the base (5), its wall thickness at that point being from 3.4 mm to 4.4 mm. The parison (1) also has a wall thickness of from 1.4 mm to 2.2 mm at the parison shoulder (A). The external diameter of the parison shoulder (A) has been judged in such a way that its separation (d) from the blow molding wall (12) is from 1.2 mm to 3 mm when the parison (1) is inserted into the blow mold (10).
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