Abstract: A method and apparatus are disclosed for injection molding tubular plastic articles around cylindrical core pins at a molding station, for cooling the articles while supported on the core pins, and for then axially stripping the articles from the core pins at an ejection station. The article stripping step is accomplished by a horizontally reciprocable carriage which is selectively moved into and out of vertical alignment with a set of core pins and molded articles positioned at the ejection station. Sectional gripping members on the carriage are radially closable when in alignment with the molded articles, to grasp the articles for their axial removal from the core pins upon the horizontal displacement of the carriage. The stripped articles may be held in a horizontal cantilever position between the gripping members during an operational dwell time for additional cooling subsequent to their removal from the core pins.

Abstract: A method and apparatus are disclosed for injection molding tubular plastic articles around cylindrical core pins at a molding station, for cooling the articles while supported on the core pins, and for then axially stripping the articles from the core pins at an ejection station. The article stripping step is accomplished by a horizontally reciprocable carriage which is selectively moved into and out of vertical alignment with a set of core pins and molded articles positioned at the ejection station. Sectional gripping members on the carriage are radially closable when in alignment with the molded articles, to grasp the articles for their axial removal from the core pins upon the horizontal displacement of the carriage. The stripped articles may be held in a horizontal cantilever position between the gripping members during an operational dwell time for additional cooling subsequent to their removal from the core pins.

Abstract: A laser detection system for detecting parisons or portions of parisons remaining on cylindrical core pins at an ejection station. Injection molding of tubular parisons around cylindrical core pins occurs at a molding station; cooling the parisons while supported on the core pins occurs at a cooling station; and then, axially stripping the parisons from the core pins occurs at an ejection station. The parison stripping step is accomplished by a horizontally reciprocable carriage which is selectively moved into and out of vertical alignment with a set of core pins and parisons positioned at the ejection station. Sectional gripping members on the carriage are radially closable when in alignment with the parisons, to grasp the parisons for their axial removal from the core pins upon the horizontal displacement of the carriage.

Abstract: A method and apparatus are disclosed for injection molding tubular plastic articles around cylindrical core pins at a molding station, for cooling the articles while supported on the core pins, and for then axially stripping the articles from the core pins at an ejection station. The article stripping step is accomplished by a horizontally reciprocable carriage which is selectively moved into and out of vertical alignment with a set of core pins and molded articles positioned at the ejection station. Sectional gripping members on the carriage are radially closable when in alignment with the molded articles, to grasp the articles for their axial removal from the core pins upon the horizontal displacement of the carriage. The stripped articles may be held in a horizontal cantilever position between the gripping members during an operational dwell time for additional cooling subsequent to their removal from the core pins.

Abstract: This disclosure relates to a plastic container having a separate cup-shaped base telescopically assembled on its bottom to provide stability so that the container can stand upright, and to a method of assembling the base on the container. The container includes a tubular side wall, such as in blow-molded bottles, and a generally convex bottom which is integrally interconnected to the side wall by an arcuate annular heel. A peripheral groove is provided on the outer surface of the container adjacent the heel to receive a radially inwardly directed peripheral bead or lip on the upper end of the base, forming an essentially water-tight seal. One or more longitudinal surface indentations are formed on the outer surface of the container beneath the circumferential groove, to allow the escape of air between the base and the container bottom during their telescopic assembly.