Abstract: A plastic bottle is formed by extruding a hot plastic parison around a blow pin within a two-part mold. The mold is closed and sealed and the parison is expanded by air pressure against the cooled internal wall of the mold. Each mold half at its top neck carries a sealing assembly which seals against the blow pin. The blow pin is cooled by the air pressure and has an elongated lower tubular portion with air holes which are slanted upwardly to form a selected blow air pattern to aid in forming the handle portion of the bottle.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Devices for making hollow articles such as bottles from thermoplastic resin with a blow mold wherein a parison in the mold is shaped by air blown through a blow pin carrying a mandrel arranged to seal a portion of the parison with respect to a section of the mold in order to provide an additional quantity of thermoplastic resin in a critical area to be subsequently shaped in a smooth inner annular surface by the mandrel.

Abstract: A process for the production of hollow articles from preforms of a thermoplastic material, one open end of which preforms has a neck moulded at least partially into its definitive shape. During the final blowing operation, the region corresponding to the moulded part of the preform is isolated from the remainder of the interior of the preform. The isolated region is cooled by sweeping with a cooling fluid.

Abstract: A method and apparatus are disclosed for blow molding a container with an angular neck from a parison of thermoplastic material at a single station at which extrusion of the parison, compression molding of the neck of the container and blowing of the parison occurs. In the method, the mold sections, which have a cavity that defines the container with the angular neck, are pivotally mounted so that the parison can be positioned between the open mold sections in the desired location, and after the mold sections are closed on the parison, the mold sections are pivoted so that the angular neck is aligned to receive a blow pin for performing the compression molding and blowing operations.

Abstract: A construction for neck forming in a blow molding machine of the type having a retractable blow pin at a station separate from the parison extruding station. The construction results in a clean, non-fuzzy neck edge requiring no subsequent cleaning operation, and facilitating stripping of the product from the blow pin. The machine comprises a floating hardened shear ring as part of the blow pin assembly which has an interference fit with flared hardened inserts on the neck portion of the mold halves, thus creating a sharply defined upper neck edge. Means are provided for momentarily releasing downward pressure on the blow pin assembly as the mold halves are being retracted to prevent damage to the inserts. The blow pin assembly incorporates a self-centering arrangement for this shear ring and a controlled compressed air leakage system which cools and spreads the hot flash in the vicinity of the blow pin.

Abstract: An apparatus for cooling the neck moil of a blown container so that such moil can be easily removed from the container is disclosed. The apparatus has a main body portion which is connected to the rod of a blow pin cylinder so that the apparatus can be moved towards and away from the blow mold. The main body portion also has attached thereto the blow pin, a cutting collar and a rotation collar. To feed blow air to the blow pin, the main body portion provides an air channel. An annular cylinder is formed in the body portion which cylinder accepts an annular piston which piston has a cooling plate connected thereto. The cooling plate is designed to contact and flatten the moil against the cold blow mold so that the moil is cooled. By feeding compressed air to the cylinder at its upper end, the cooling plate is moved to contact the moil and by feeding compressed air to the cylinder bottom the cooling plate is retracted from the moil.

Abstract: A hollow doll in which the doll's head is formed of elastomer material, and is blow molded to include a downwardly extended annular lip having a semicircular groove at the front of the neck. The lip is constructed to fold inwardly, and to engage a bead or flange on the neck portion of the body, thereby securing the head to the body. It is contemplated, in accordance with the present invention, that other appendages can be secured to a primary body in a similar manner.