Abstract: A hand-held dispenser for a flowable product, including a container having a neck portion at its top, and a cap body having a discharge opening and a base portion cooperable with the neck portion of the container to mount the cap body thereon. The base and neck portions have cooperable automatic pressure-relief valving structures which are responsive to increased gas pressure in the container, for venting a limited quantity of gas when the container is in its upright position, so as to prevent possible explosion of the container and spillage or splattering of its contents. In one form, there is a first annular sealing surface on one portion and a cooperable annular sealing surface on a companion portion which is engageable with the first surface when the cap body is fully seated on the neck portion. A projection on one of the portions is located adjacent the sealing surface thereof, and is engageable with the cooperable sealing surface on the other of the portions.

Abstract: A tamper-evident cap construction for a dispenser, comprising a cap body having a discharge opening, a screw cap carried thereon and adapted to close off the discharge opening, and a frangible tab that is integral with the screw cap and which extends outwardly over an exposed exterior surface of the body and is integral therewith by virtue of a common fused juncture area at the surface. Preferably the fusing takes the form of a sonic weld. The tab has a transverse line of weakness which can be adjacent to either the point of attachment of the tab to the screw cap, or else to the fused area. The tab normally prevents relative turning between the screw cap and the cap body, but can rupture when a turning force is applied therebetween, having a magnitude which is less that required to separate the tab from the body at the location of the fused juncture.

Abstract: A tamper-evident plastic closure cap construction which is intended to provide to the consumer a distinctive visual alerting indication in the event that the container has been previously opened or tampered with, comprising a closure portion and a base portion, the latter being snapped into position on the container and held permanently thereon by means of cooperable retainer shoulders. The closure portion seals off the dispensing orifice of the container in a usual manner. Joining the closure portion to the base portion are multiple frangible webs associated with an indicator ring which normally occupies a first or depressed position prior to opening of the container. When the closure portion is initially turned or otherwise disturbed, the frangible webs break, and their resilience causes the ring to shift laterally by a significant amount to a second or raised position, which attracts the attention of one handling the container.

Abstract: A cam-advance, thread-retract dispensing stopper cap construction of unusually short axial dimension, comprising a body portion having annular walls with a discharge passage extending through it, and a captive screw cap movable axially on the body portion between sealing and dispensing positions. Both the screw cap and the body portion have cooperable screw threads which are operable in a screwing-down direction only. The body portion has a stopper plug which is carried in the discharge passage by means of multiple webs, and which is adapted to be received in a discharge orifice of the screw cap when the latter is disposed in the sealing or fully screwed-down position. An annular space is defined between the walls of the body portion and the stopper plug, and contains a curved cam track on which a depending cam follower lug of the screw cap can ride as the latter is unscrewed, thereby to positively force the cap open.

Abstract: A non-resealable dispenser cap construction for a container, comprising a cap body part having a discharge opening, an orifice part movable between sealing and unsealing positions and adapted to selectively seal off the discharge opening, and means for preventing re-closing of the cap construction following an initial dispensing operation. There are provided cooperable camming surfaces on the cap body and orifice parts, which tend to hold the latter part in a sealing position, as during shipping. A one-way drive thread is provided, functioning when the orifice part is turned in an unscrewing direction, but being inoperable when the orifice part is thereafter turned in a screwing-on direction. Interference shoulders prevent the orifice part from returning to its sealing position, following an initial discharge.