B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/60 (2006.01) B29C 49/58 (2006.01) B29C 49/04 (2006.01)
Patent
CA 2181782
An automatic blow pin levelling apparatus for a blow moulding machine in which each of the blow pins in the apparatus are attached to pistons which are each slidably engaged to a cylinder. Each cylinder includes a fluid filled space between a closed end of the cylinder and the piston, and all the fluid filled spaces are interconnected such that the fluid within each of the spaces can be displaced to the other spaces in order to achieve an equilibrium state in which the pressure of the fluid in all of the spaces is the same. Also, a centering holder for a blow pin comprises a first holder, a second holder, means for fixing a blow pin to the second holder, and a clamp for fixing the second holder to the first holder, the clamp having a first position and a second position relative to the first holder, wherein in the first position the second holder is rigidly fixed to the first holder, and in the second position the second holder is permitted limited movement relative to the first holder such that a blow pin fixed to said second holder can be aligned with respect to an opening in a blow mould.
Heins Bernhard
Ridout & Maybee Llp
LandOfFree
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