Abstract:
A method for fabricating a preform by providing a plurality of preform segments which each define a portion of a preform, positioning said preform segments in continuous contact with each other along at least one edge of said preform segments such that said plurality of preform segments define a cavity, and bonding each of said preform segments to at least one other preform segment such that said plurality of preform segments forms a continuous whole.
Abstract:
A preform for blow moulding to form a container, the preform being formed of a thermoplastic material, the preform comprising a neck finish at an open end of the preform, an elongate body section and a closed end, wherein the body section has elongate, longitudinally extending inner and outer surfaces each centered about a longitudinal axis of the preform, the inner and outer surfaces defining therebetween a wall of the body section, wherein the wall of the body section has at least one locally thickened portion along the body section, the locally thickened portion being thicker than adjacent first and second thinner portions at respective opposite longitudinal ends of the thickened portion, the thickened portion having an inner surface portion which is nearer to the longitudinal axis than respective first and second inner surface portions of the first and second thinner portions.
Abstract:
Moulding apparatus comprises a mould (12) defining a blow mould cavity (14) and a core (18) which projects into the blow mould cavity. The mould has at least one mould member (22, 24, 26) movable to an extended position in which it defines together with the core (18) at least part of a preform moulding cavity (28) for moulding a preform. The at least one mould member (22, 24, 26) can be moved to a retracted position [FIG. 2] whereby a preform produced in the preform moulding cavity can be expanded into the blow mould cavity. The moulding apparatus includes a locking member (22) adapted to engage the core so as to resist lateral movement of the core whilst material is introduced into the preform moulding cavity. A method of using the apparatus is also disclosed and claimed.
Abstract:
A method of forming a container (10) from bi-axially orientable plastics material and having an integral handle formed from a stem (15); said method comprising: (a) forming a preform (26, 36) having a neck portion and an expandable portion (12) below the neck portion (11), said neck portion including a locating ring (14) above the expandable portion and a solid stem (15) of orientable thermoplastics material projecting from or near the neck portion or immediately below it and moulded integrally therewith, and (b) performing a blow moulding operation on said preform to expand the expandable portion to form the body of the container. Also disclosed is a container (10) manufactured from a two stage injection stretch blow moulding process, said container including a graspable handle affixed at at least a first point to said container so as to form an enclosed area between the handle and the container and through which the fingers of a human hand may be passed.
Abstract:
A core structure (10) is disclosed for making a preform with an integral hollow handle. The core structure includes an elongate body (12) from which two retractable elements (26, 28) protrude. The mechanism for retracting and extending the elements (26, 28) is within the body (12) and is operated by members (32, 34) which protrude from one end of the body (12). The preform produced by the core structure, and the bottle blown from the preform, are also disclosed.
Abstract:
The invention relates to a method for the production of a container (45null), with an opening (53), whose opening axis (57) is at an angle to the container axis (23), whereby a blank (45) is introduced into a blowing mould (11, 13), a fixing region (47) of the blank (45) pressed against a stop zone (41) on the blowing mould and the blank pneumatically formed in the blowing mould. The fixing region (47) of the blank (45) is pressed against a stop zone (41) on the blowing mould, inclined at an angle other than 90null. The moulding thus occurs such that an opening region axis (58) of the blank (45, 45null) is at an angle to the container region axis (59) of the blank (45, 45null). The opening axis (57), of the blowing mould (11), forms an angle to a longitudinal axis (51) of a stretching drift (49), which may be extended along the longitudinal axis thereof. Blanks (54) can be introduced into said blowing mould (11, 13), the container region (55) directionally fixed therein with a stretching drift (49) and the opening region (53) pressed against the inclined stop zone (41) by a pressing piece (33). The opening axis (57) of the blank is thus kinked relative to the container region (59) thereof.
Abstract:
A dual-chamber container is formed in an injection blow molding process. Two preforms are injection molded around respective core rods. The preforms and core rods are then moved to a blow mold, in which the preforms are molded to the confines of the mold. The blow mold has partial walls between the two cavities, which provide directional control over the preforms as the preform wall portions are blown against and contact welded to each other. The outer walls of the preforms, which must travel and stretch a greater amount than the inner walls, are formed thicker in the preform molding operation.
Abstract:
The plastic container and body including a body portion, a neck defining a finish and having an opening therein and a closure connected to the end of the neck by a strap. The strap is formed with a weakened line such as to define a integral hinge about which the closure is folded after filling the container with the contents in order to bring a plug portion of the closure into engagement with the opening of the finish.
Abstract:
A synthetic resin bottle produced by blow-molding a parison of a synthetic resin. In the blow-molding process of the parison, the portion of the parison supporting the handle is prevented from being expanded, thereby to sufficiently increase the supporting strength of the handle. Since the bottle product has its drum recessed in the vicinity of the handle, the grip of the handle can be facilitated.
Abstract:
A method is disclosed for blow molding poly(ethylene terephthalate) preforms, such as injection molded parison, to achieve exterior surface embossed designs on blown containers without using profiled blow mold cavity walls. In the method, a raised profile is molded or otherwise formed on the exterior wall of the preform, defining a preform wall portion having embossed areas. Then the entire preform is heated to blowing temperature and it is also disclosed that when the raised portion is at the same time raised to a higher temperature the embossed design of the preform is opacified by crystallization without crystallizing the balance of the preform. Thereafter, the preform is blow molded under conditions such that the poly(ethylene terephthalate) material strain hardens in order to cause the different wall thicknesses to expand and stretch essentially proportionately. The blown containers with an embossed design formed by this method include a surface contour which is essentially proportionately shaped to the surface profile formed on the pre-existing preforms.