PREFORM FOR PRODUCING PLASTIC CONTAINERS IN STRETCH BLOW MOULDING PROCESS Russian patent published in 2017 - IPC B29B11/14 B65D1/02 

FIELD: packaging industry.

SUBSTANCE: invention relates to support ringless preform for production of plastic containers, use of such preforms and plastic container. Technical result is achieved by a support ringless preform for production of plastic containers by blow moulding, having a substantially elongated body, one end of which is closed. With its opposite longitudinal end, preform body adjoins a pour opening neck portion, on external wall of which are fasteners for fixing with geometrical closure equipped with mating cover engagement means. At transition from preform body to neck there is a formed enveloping ring flange, which extends radially outside preform body outer wall. In area between flange and fasteners neck has envelope annular groove, limited by flange, and in direction of fasteners-external collar, extending aslant from bottom of annular grooves to external wall of neck. External shoulder forms on inner wall of spout enveloping in an annular manner inner collar, which extends, if seen in direction of body preform, axially above annular groove and transitions into preform body inner wall without undercuts.

EFFECT: reduced number of incorrectly oriented preforms in sorting devices and reduced material consumption.

25 cl, 5 dwg