Abstract: A tamper indicating closure is formed with connecting frangible straps between the cap and the tamper indicating band by molding connecting straps which are oversized and reforming the straps to produce reduced thickness frangible straps.
Abstract: A two piece closure is shown for use with a pressurized container such as a carbonated soft drink bottle. A threaded cap has a gas barrier sealing insert snap attached to it for sealing the insert to the cap and to the lip of the container neck in pressure enhanced relationship.
Abstract: Reverse gating is added to a conventional compression molding machine so that when the molding cavity is filled with material in excess of the amount required to mold a part, the material flows from the cavity to a pressure chamber to be vented. Pressure in the chamber allows back flow of the material from the chamber to the molding cavity during cooling to compensate for shrinkage.
Abstract: A threaded closure and container arrangement having complementary annular surfaces on the closure and container which engage each other during threading and unthreading to guide the closure and container into axial alignment and to shape the relatively flexible neck opening of the container into an accurate circular shape so that complementary sealing surfaces are brought into accurate engagement with each other and so that the complementary surfaces maintain an axial force tending to maintain the closure and container in sealing relationship during at least initial unthreading movement of the closure from a fully closed position on the container
Abstract: A twist-to-open dispensing closure has a cap which threads directly onto the container neck. A bead at the bottom of the cap skirt snaps over a flange on the container neck for primary retention of the cap on the container neck. An upwardly projecting lug on the cap bead cooperates with a pair of axially extending walls on the container flange to give the user, while unthreading the cap, a sense of approaching the open, dispensing position of the closure and the cap locks in this dispensing position against further rotation, preventing accidental removal of the cap by snapping the cap bead over the container neck flange.
Abstract: A tamper indicating closure has a tamper indicating band which is retained on a container by a container neck flange without the use of a cooperating bead or flange on the tamper indicating band. The retention is accomplished by providing a flexure at the bottom of the cap skirt which permits the band to move outwardly over and under the container flange. The closure can have a tear strip which provides the flexure on the closure.
Abstract: A method of injection molding a container cap with a precision thread having a tamper indicating band depending from the bottom of the cap skirt. Collet jaws form at least a frangible connection between the bottom of the cap skirt and the top of the tamper indicating band, and these jaws are moved radially outward specified amounts during the molding process to provide clearance for stripping an inwardly directed retaining element on the band from the core and for ejection of the finished cap.
Abstract: A tamper indicating closure having a threaded cap and a tamper indicating band connected to the cap by frangible webs and by a tether structure which permits threaded attachment of the closure to the container with the band positioned below an annular flange on the container so that unthreading of the cap permits deformation of the tether structure until all of the webs are fractured after which unthreading causes the tether structure to pull a localized area of the band over the annular flange to permit removal of the band and cap as a unit from the container.
Abstract: An adaptor and a closure are formed with cooperating child resistant elements so that the adaptor can be applied to any type of container and the closure can be removed from the adaptor only by manipulation of the child resistant stops. Both the adaptor and closure are molded with precision surfaces as by injection molding so that the closure can be sealingly attached to the adaptor without the use of excessive force.
Abstract: An adaptor and a closure are formed with precision surfaces as by injection molding so that the closure can be attached to the adaptor without the use of excessive force to create a secondary seal. The adaptor-closure can then be attached to an imprecisely formed threaded container such as an extrusion-blow molded bottle to create a primary seal. The adaptor is permanently retained on the container with securing by thread wedging, cooperating ratchet teeth or the like.
Abstract: A two-piece child resistant closure having projections on the top of the inner cap. These projections are accessible through the open center of the outer cap top to assist the user in unthreading the container. This provides a user friendly closure for the elderly and arthritically impaired while still maintaining the usual child resistant opening feature, which can, for example, require a simultaneous push and turn movement.
Abstract: Injection-blow molding apparatus in which maximum mold density is obtained by alternate arrangement of circumferentially continuous blow molds and injection molds, with closure of the blow mold being obtained by a shoulder forming sleeve or shoudler forming portion of this blow mold which is moved into abutment with a body forming portion of the blow mold.
Abstract: Injection-blow molding apparatus in which maximum mold density is obtained by alternate arrangement of circumferentially continuous blow molds and injection molds, with axial mold closure being obtained by neck forming and shoulder forming sleeves concentrically located around the cores which are reciprocated into and out of the molds.
Abstract: A tamper indicating closure for application to a container neck. The closure includes a cap having a top and an internally threaded skirt. A tamper indicating band depends from the bottom of the cap skirt by circumferentially spaced frangible connections. The band has ratchet teeth which engage ratchet teeth on the container neck, and a permanent tether rib connects the band to the cap so that the band remains with the cap when the closure is unthreaded from the container neck.
Abstract: A tamper indicating closure for application to a container neck. The closure includes a cap having a top and an internally threaded skirt. A tamper indicating band depends from the bottom of the cap skirt by circumferentially spaced frangible connections. The band has ratchet teeth which engage ratchet teeth on the container neck one at a time during threading-on and unthreading of the cap from the container neck.
Abstract: A closure including a standard threaded cap having a tamper indicating band depending from the cap skirt by frangible webs. The tamper indicating band has an inwardly directed bead which cooperates with a flange on the container neck which allows the band to rotate with the cap but prevents the band from being removed past the container flange. Alternatively the tamper indicating band contains spaced ratchet teeth which engage ratchet teeth on the container neck to prevent further rotation. A rotary seal is provided between the cap and container neck which is effective for an axial length A greater than the sum of a distance B between the cap bead and the container flange when the cap is tightened or the axial movement of the cap in rotating the ratchet teeth into contact and the distance C which the frangible webs stretch before fracture. Thus the rotary seal prevents access to the product prior to breaking the tamper indicating band loose from the cap.
Abstract: A tamper indicating container and container-closure package in which the tamper indicating band is integrally molded on the container neck with connecting frangible webs. The tamper indicating band has circumferentially spaced pawls on its top which co-act with a circumferential array of ratchet teeth at the lower end of the closure cap skirt to prevent removal of the cap upon application of opening torque without fracture of the frangible webs indicating tampering or initial opening. The closure of the container-closure package includes a cap skirt having a wall portion which recesses the cap ratchet teeth and overlaps the tamper indicating band of the container so as to keep the ratchet locking mechanism out of the view of a person endeavoring to tamper with the package.
Abstract: A push-pull dispensing closure for a container includes a child-resistant sleeve which is slidably retained between the closure dispensing cap and the closure base member. In its NORMAL position, the sleeve obstructs opening access to the cap. When the sleeve is pushed toward the base member to a READY position, the cap can be gripped for opening movement. The sleeve is molded with a resiliently deformable plastic into which a return force is introduced as the sleeve is pushed toward ists READY position.
Abstract: A dispensing closure having a base ring with means for attachment to a container which permits rotation of the ring without axial movement. A lid is connected to the base ring by a hinge which allows the lid to be swung from a closed position blocking access to a container opening to an open dispensing position. A cam element on the lid effects initial movement of the lid towards an open position when the base ring is rotated. The lid cam element cooperates with a cam surface on the container. A fitment can also be used to attach the closure to a flat can top or to other container configurations. When a fitment is used, the cam surface will be on the fitment rather than the container.
Abstract: An apparatus for forming a unitary molded container with a special neck configuration such as a drain-back neck with integrally molded internal threads and a pouring spout. The apparatus comprises a circumferentially continuous sleeve which surrounds the core rod in an injection-blow molding machine.