Abstract: A vertical rotary blow molding machine with dual cavity molds includes two coextrusion flow heads for extruding multi-layer parisons for capture and blowing in the dual cavity molds.

Abstract: A blow molding machine and method for blowing sealed aseptic bottles includes a blow pin having separate blow air and exhaust passages. The retracted blow pin is dwelled in a pin housing filled with sterile air. The housing is connected to the pin by two thin rolling diaphragm seals. Sterile air in the chamber maintains the sterility of the sides and end of the blow pin. The separate blown air and exhaust passages maintain sterility of the machine despite possible rupture of a parison or bottle.

Abstract: A blow molding machine and method for blowing sealed aseptic bottles includes a blow pin having separate blow air and exhaust passages. The retracted blow pin is dwelled in a pin housing filled with sterile air. The housing is connected to the pin by two thin rolling diaphragm seals. Sterile air in the chamber maintains the sterility of the sides and end of the blow pin. The separate blown air and exhaust passages maintain sterility of the machine despite possible rupture of a parison or bottle.

Abstract: A method for trimming an inner ring from the neck flange of a blow-molded plastic bottle by extending a reverse punch into the bottle through the flange opening, elastically bending the flange into the interior of the bottle as the punch passes and withdrawing the reverse punch from the bottle and trimming a ring from the flange.

Abstract: An apparatus and method for trimming an inner ring from the neck flange of a blow-molded plastic bottle by extending a reverse punch having a lead end and a trailing end larger than the lead end into the bottle through the flange opening, elastically bending the flange into the interior of the bottle as the punch passes and withdrawing the reverse punch from the bottle and trimming a ring from the flange.

Abstract: An apparatus for trimming a ring from the neck of a blow molded plastic bottle includes a reverse punch for cutting a ring from the neck and positioning the ring on the punch shaft and a ring stripper for cutting one side of the ring on the punch shaft and pulling the other side of ring from the shaft. The ring stripper includes a hook for engaging the ring and pulling the ring against a blade. The blade severs the ring and the hook then strips the severed ring from the shaft for disposal.

Abstract: A parison is blow molded to form a sealed aseptic bottle for subsequent opening and filling. The pressure of the gas in the interior of the bottle when sealed is sub-atmospheric to prevent distortion of the bottle.

Abstract: A machine and method for sealing closed an integral neck of blow molded bottle and simultaneously forming an integral twist-off.

Abstract: A machine and method for sealing closed an integral neck of blow molded bottle and simultaneously forming an integral twist-off.

Abstract: A parison is blow molded to form a sealed aseptic bottle for subsequent opening and filling. The pressure of the gas in the interior of the bottle when sealed is sub-atmospheric to prevent distortion of the bottle.

Abstract: A blow molding apparatus including a pair of mold halves, a sealing blade mounted in one mold half and extendable into the mold cavity to seal the blown bottle, a drive member and an angled force multiplying drive connecting the drive member and blade is used in a method to produce a molded sealed bottle.

Abstract: A blow molding machine having a mold cavity, a blow needle bore opening into the cavity with a blow needle in the bore, a vacuum source for drawing blow air from a molded article and an exhaust passage extending from the blow needle bore to the source for reducing pressure within the blown article.

Abstract: Blow molding apparatus including a pair of mold halves, a sealing blade mounted in one mold half and extendable into the mold cavity to seal the blown bottle, a drive member and an angled force multiplying drive connecting the drive member and blade.

Abstract: A blow pin assembly for use in blowing aseptic bottles includes a hollow blow needle and a sterile air system for maintaining the sterility of the needle tip.

Abstract: A carrier ring for achieving attachment to the thermoplastic perform as the preform is formed in a split injection mold is disclosed. The split injection mold defines a mold cavity into which a core pin is positionable. The mold cavity, along with the position core pin, defines the principle portion of the preform cavity. The remainder of the preform cavity is provided by an annular groove in the carrier ring. This annular groove has a substantially horizontal outwardly extending first wall, a substantially horizontal inwardly extending second wall downwardly displaced from the first wall, and a downwardly and inwardly extending third wall emanating from the outwardmost extent of the first wall and terminating at the inward most extent of the second wall.

Abstract: This invention relates to an improved injection molding apparatus which enables change out of the injection mold without requiring core pin to injection mold cavity alignment for each change out operation. Automatic alignment is provided by pockets into which the injection mold halves fit. The injection mold halves and the pockets are configured to insure correct alignment.