Abstract: A tamper-evident closure for sealing an open-topped container. The closure is of one-piece molded construction and includes a cap having an annular top wall and an annular skirt dependent therefrom and joined thereto about the periphery of the top wall. The skirt has an internal thread for cooperation with the thread on the finish of the container. The closure further includes a tamper-indicating assembly including a band spaced from the skirt by a number of frangible bridges. The assembly also includes a segmented ring connected to the bottom of the band and extending upwardly and inwardly therefrom with the ring including a number of segments with adjacent segments being separated by a slot. The assembly also includes a number of resilient tabs connected to the upper end of each segment and extending upwardly and inwardly therefrom for engaging the breaker ledge of the container finish upon attempted removal of the closure from the container.

Abstract: A nested, two-piece, child-resistent closure is provided which includes an inner cap having a rigid, non-deformable upper end and a cylindrical skirt with a smooth outer surface and threaded inner surface. The outer upper end of the inner cap includes a series of upwardly projecting lugs arranged adjacent the center thereof. A series of upwardly projecting segments, of a height less than that of the lugs, is arranged about the periphery of the upper end of the inner cap. The outer cap, coaxially aligned with and generally overlapping the inner cap, has a resilient upper end and a cylindrical skirt with a smooth inner surface. Depending downwardly from the inner surface of the outer cap's upper end is a series of lugs aligned with the lugs on the inner cap to provide unidirectional drive means in the closure direction.

Abstract: A child-resistant, tamper-evident closure having nested inner and outer caps with ratchet teeth on the interfacing skirt walls of the respective caps to cooperate to fasten the closure onto the container, and ratchet teeth on the interfacing top walls of the respective caps for removal of the closure upon simultaneous application of torque and a downward force. The inner cap further includes a tamper-indicating ring depending from the lower edge of its skirt, the ring including a breakable connection for detachably securing the lower portion thereof to the inner cap skirt. A plurality of tabs extending upwardly and radially inwardly from the ring engage an annular shoulder on the container during the removal of the closure to break the ring away from the inner cap skirt.

Abstract: A tamper-evident closure is provided which includes a threaded cap and tamper-indicating means having upwardly and inwardly folded tabs which lock against the lower surface of an annular shoulder on a container neck to retain the tamper-indicating means on the neck as the cap is removed. The tamper-indicating means includes a ring to which the tabs are integrally connected at their lower outer ends. The tabs are resilient and are flexed by the container finish at the joints where they are joined to the ring. The closure of the present invention may be installed simply by screwing it onto a container neck in a one-step process. The flexible tabs assist in guiding the closure and centering it as it is lowered onto the container neck for installing and do not require the holding of the closure or the container finish to close tolerances in order to be consistently effective.

Abstract: A tamper-evident closure is provided which includes a threaded cap and tamper-indicating means having upwardly and inwardly folded tabs which lock against the lower surface of an annular shoulder on a container neck to retain the tamper-indicating means on the neck as the cap is removed. The tamper-indicating means includes a ring to which the tabs are integrally connected at their lower outer ends. The tabs are resilient and are flexed by the container finish at the joints where they are joined to the ring. The closure of the present invention may be installed simply by screwing it onto a container neck in a one-step process. The flexible tabs assist in guiding the closure and centering it as it is lowered onto the container neck for installing and do not require the holding of the closure or the container finish to close tolerances in order to be consistently effective.

Abstract: A child-resistent, moisture-tight safety closure having an end wall with an annular depending skirt, the skirt having a plurality of locking lugs disposed on the inside thereof. The locking lugs cooperate with retaining notches adjacent to the open mouth of an associated container to releasably retain the closure on the container. A sealing plug integral with the end wall of the closure and concentric with the annular skirt effects a moisture-tight seal with the inner wall of the container. A plurality of resilient members are integral with the interior of the closure at the junction of the top wall and the skirt, the resilient members extending downwardly and inwardly so as to engage the end surface of the container opening. The compression of the resilient members serves to bias the locking lugs on the closure into locking relationship with the retaining notches on the container with a force sufficient to ensure the child-resistant characteristics of the closure.

Abstract: A moisture proof vial and closure system are provided which may be used in a child-resistant mode or in a non-child resistant mode. In the child-resistant mode locking lugs 22 on the closure are interlocked with bayonnet slots on the vial. A non-child resistant operation in a moisture proof system may be achieved by providing an integral sealing plug 21 extending from the top of the closure and by adding a detenting means 51 inside of the container to engage and hold the sealing plug 21 against sliding outwardly of the container. A simple push inward will force the sealing plug 21 home to its sealing position to seal the medicine in the vial, and a simple push or pull on the closure to force the fitment from the detenting means is needed to remove the closure. The preferred detenting means 51, 15 is in the form of radially inwardly directed projections 52 formed on the interior container wall to abut and restrain the sealing plug against inadvertent sliding from the container.

Abstract: A method of manufacturing a tamper-evident closure having a detachable annular tamper-indicating portion includes a step of testing the connection between the detachable portion and the remainder of the closure. The testing may comprise either use of optical detection apparatus or use of a deflection measuring system which applies radial pressure to the detachable portion. A tamper-evident closure having a detachable annular tamper-indicating portion includes gaging means to cooperate with optical detection apparatus to enable detection of closures having unacceptable tolerances.

Abstract: A tamper-evident closure is provided which includes a threaded cap and tamper-indicating means having upwardly and inwardly folded tabs which lock against the lower surface of an annular shoulder on a container neck to retain the tamper-indicating means on the neck as the cap is removed. The tamper-indicating means includes a ring to which the tabs are integrally connected at their lower outer ends. The tabs are resilient and are flexed by the container finish at the joints where they are joined to the ring. The closure of the present invention may be installed simply by screwing it onto a container neck in a one-step process. The flexible tabs assist in guiding the closure and centering it as it is lowered onto the container neck for installing and do not require the holding of the closure or the container finish to close tolerances in order to be consistently effective.

Abstract: A closure includes a plurality of tabs extending upwardly from its top wall to enable manual application of torque to the closure without gripping of the side wall thereof. The preferred tabs have surfaces defining a plane for supporting the closure in an inverted position for installation of a liner, and do not extend radially beyond the side wall of the closure.

Abstract: A moisture proof vial and closure system are provided which may be used in a child-resistant mode or in a non-child resistant mode. In the child resistant mode locking lugs 22 on the closure are interlocked with bayonnet slots on the vial. A non-child resistant operation in a moisture proof system may be achieved by leaving the locking lugs 22 off of the closure skirt wall 20 and by adding a detenting means 51 inside of the container to engage and hold a sealing plug 39 against sliding outwardly of the container because of the lack of locking lugs on the closure 10A. A simple push inward will force the sealing plug 39 home to its sealing position to seal the medicine in the vial, and a simple pull on the closure to pull the fitment from the detenting means is needed to remove the closure. The preferred detenting means 51 is in the form of radially inwardly directed projections 52 formed on the interior container wall to abut and restrain the sealing plug against inadvertent sliding from the container.

Abstract: A polypropylene closure for glass containers. The enclosure has a top end wall and a depending annular skirt wall. A substantially rigid V-shaped sealing fin of triangular cross-section projects downwardly from the top end wall to engage the finish of a glass container neck in sealing relation when the closure is applied to the container. The closure is threaded onto the container neck and the sealing fin comes into contact with the finish. The application of additional closure torque causes the sealing fin to deform and be crushed.

Abstract: A squeeze bulb dropper assembly is combined with a child resistant closure to form an assembly which cannot be readily removed by younger children. The assembly provides a vapor proof and leakproof connection with the bottle. The preferred assembly employs a closure having an outer cap and an inner cap in which the inner cap rotates with the outer cap in an application direction, but remains stationary relative to a bottle to which it is engaged when the outer cap is rotated in a removal direction unless a simultaneous downward force is applied to the outer cap to intermesh cooperating members on the caps. The closure includes a dropper bulb disposed through the caps so that a resilient compressible flange on the bulb provides the spacing between the cooperating members of the caps unless a downward pressure on the outer cap compresses the flange.

Abstract: A child-resistant closure and container system is provided with a snap on and off closure requiring a coin or tool to remove the closure. A skirt wall on the closure is positioned sufficiently close to a shoulder on the container that the gap between the bottom edge of the skirt wall and adjacent shoulder is insufficient to admit a tool or to allow the teeth of a child to enter and to be used to pry off the closure. The shoulder diameter is equal to or greater than the diameter of the skirt wall to prevent the child's teeth from engaging and prying off the cap. A small notch is formed in the skirt wall to allow a coin or tool to be inserted and to be twisted against the shoulder to pry off the closure.

Abstract: A method for forming a gasket for a container closure. In the method, a dispersion of a finely powdered plastic resin in a fluid carrier is prepared and the viscosity of the dispersion is adjusted to provide desirable flow characteristics. The resin is not associated in the dispersion with a plasticizer. An annulus of the dispersion is applied to a container closure. The applied annulus of the dispersion is then subjected to an elevated temperature for a sufficient time to remove the carrier and to fuse the thermoplastic resin particles which are united to form a resilent seal.

Abstract: A closure for glass containers is formed with a top end wall and a depending annular skirt wall. A base ring depends downwardly from the top end wall and supports a small sealing fin which projects downwardly from base ring to engage the finish of a glass container neck in sealing relation when the closure is applied to the container. The preferred base ring is tapered downwardly and outwardly and facilitates the flow of plastic into the sealing fin during molding of the closure. The closure is threaded onto the container neck and the sealing fin comes into contact with the finish. The application of additional closure torque causes the sealing fin to deform and be crushed. Polypropylene has the desired structural properties of flexural stiffness, hardness and compressive strength to be used for the closure.

Abstract: A child safe closure of the kind which is secured to a container by interengagement of locking lugs within locking recesses is provided with a sealing member which provides a moisture tight seal with an internal wall of the container. The sealing member has a sealing bead which is inserted deeply within the container opening to a location adjacent or below the lower ends of integrally formed locking lugs or recesses on the container to avoid any depressions made in the interior wall of the container during cooling of thicker cross sectional portions of the container wall. A tapered lead-in surface on the container guides and centers the sealing bead as it travels downwardly toward its sealing position. Preferably, the sealing member is in the form of a separable, flexible sealing fitment retained within the closure cap and formed with an annular flange connected through an annular transverse V-shaped web to a circular planar crown.

Abstract: To prevent leakage of the container contents when a child attempts to turn a child-safe closure in the removal direction, the closure is formed with a series of closely spaced detent members at least one of which will abut a detent member on the container to limit turning of the closure in the removal direction to a degree insufficient to allow leakage. Preferably, a series of six closely adjacent radially extending tab like detent members extend outwardly from the skirt wall of the closure within a quadrant of the skirt wall to assure locking by at least the leading or trailing one of the detent members under the worst tolerance conditions. The intermediate detent members become effective for other tolerance conditions which result in the manufacture of the closure and container which are usually made of molded plastic.

Abstract: A method is provided for treating ionomeric polymers so as to inhibit the tendency of the polymers to form films. A coating composition including the treated ionomeric polymer is suitable for coating glassware so as to provide glassware having improved resistance to abrasion. The ionomeric polymer coating on the glassware resists film formation when the coating is inadvertently applied to the interior surface of the glassware. The method includes the step of adding colloidal silica to an aqueous dispersion of an ionomeric polymer.