Patent ID: 6273705
Filing Date: 2001-08-14
Classification: B29C

Abstract:
A blow-pin assembly using pressurized air to blow mold hollow objects from parisons, comprising:a circular body having (i) an outer circumferential surface for receiving the parison neck portion, (ii) a central passage for receiving pressurized blow air, (iii) a circular groove formed in the outer circumferential surface, the groove having a contact surface, and (iv) a through hole formed between the central passage and the groove for directing the pressurized air from the central passage to the groove; andan annular seal band having first and second contact surfaces, the second contact surface having a substantially identical geometric profile to the contact surface of the groove, the seal band being retained in the groove so that the pressurized air from the cental passage urges the first contact surface of the seal band into contact with the parison and urges the second contact surface of the seal band into surface contact with the contact surface of the groove, whereby the seal band inhibits leakage of the pressurized air from both the parison and the groove.