B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/536
B29C 49/60 (2006.01) B29C 49/46 (2006.01) B29C 49/48 (2006.01)
Patent
CA 1114118
ABSTRACT OF THE DISCLOSURE An extruded tubular blank is placed in a mould such that it is divided into two portions connected by a conduit coaxial with a blowing needle. A first one of the portions is blown to form a container, whereas the second is not blown and remains hot and mallable. The walls of the second portion are then compressed one against the other and welded together to close the blowing orifice. In order to carry out this method, the mould comprises two chambers, and a blowing conduit which starts from one of the chambers, passes through the other and opens out on the outside. The blowing needle slides in this pipe in an air-tight manner so as to inflate solely the first chamber. A flat head driven by a piston moves in the second chamber in order to crush and weld together the walls of the unblown second blank portion. Alternatively the second blank portion may be crushed by compressed air.
320432
Marks & Clerk
Pont-A-Mousson S.a.
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