Self collapsing flexible container for parenteral solutions and mould for making a selfcollapsing flexible container for parenteral solutions

1517359 Portable containers; blood bags BAXTER TRAVENOL LABORATORIES Inc 13 Nov 1975 [21 Nov 1974 (3)] 46955/75 Headings B8D and B8K [Also in Division B5] The body part 10 of a collapsible blowmoulded plastics container for parenteral solutions, terminating in semi-rigid shoulder and neck portions 16 and 14 at one end and sealed at the other end 18, has, in the asmoulded form, a portion 53 of oval cross-section adjacent the shoulder and a contiguous portion 49 whose cross-section progressively flattens to a flattened configuration at the end 18 thereby facilitating progressive collapse from the end 18 as the contents are drained from the container. Longitudinal opposed moulded-in folds 58 further facilitate collapse. Opposed triangular gusset portions 68 are defined adjacent the shoulder by further moulded-in folds 72, 74 and 76, which, together with additional circumferential and shoulder junction folds 78 and 81, facilitate substantial collapse of the body portion adjacent the shoulder, Figs. 6 and 6A (not shown). The container is blow-moulded from a tubular parison in suitable configured mould portions 38, 40, 48 and 50, the folds being formed by mould ridges and channels (63, 64), Fig. 7 (not shown). The container has a hanger at one end 22 and is provided with graduations. The neck receives a cap having diaphragm sealed-outlets, one of which in use is pierced by the end of an administration set (23), Fig. 1 (not shown).