Abstract: A closure is shown for use with an ice dispensing apparatus having an ice chute defining a front opening. The closure includes a door case having a front wall of a size and shape corresponding to the chute opening, a rearwardly turned perimeter wall connected to the front wall and having an outwardly turned flange, and a pair of baffles extending rearwardly from opposite sides of the flange. An insulation core is disposed within the perimeter wall rearwardly of the front wall. A gasket engages the chute incident to the closure being in the closed position. A rear wall is provided for substantially covering the chute opening incident to the closure being in the closed position. The baffles are operable to direct flow of ice pieces delivered through the opening when the closure is in the open position.

Abstract: A bulk foodstuff dispenser with a pivotally mounted chute that dispenses product when manually depressed. A combined product ramp and chute spring takes the form of a flexible plastic plate in a product container area that engages and biases the chute upwardly to its product blocking position. When manually depressed the chute flexes the ramp upwardly above a product stop, permitting product to flow over the stop into the chute. A chute safety lever prevents inadvertent product dispensing and is designed to be operated by the same user's hand that pushes the chute downwardly.

Abstract: An ice dispensing apparatus having a storage bin with a paddle wheel which moves the ice from a storage bin to a delivery chute. A straight door is utilized to selectively open and close the delivery chute. A drip pan is provided on the outside of the chute to collect the melt water from the ice, which is in the delivery chute.

Abstract: A dispensing device is produced which is useful for dispensing a plurality of liquids which comprises a geometrically shaped base having secured thereto a geometrically shape centrally disposed member which is hollow in the center, a plurality of containers geometrically shaped to be placed on the base with one surface of each contacting the top surface of the base and another surface of each container contacting the centrally disposed member, each container having openable and closeable orifices for dispensing the liquid contained therein.

Abstract: A device for preventing or minimizing spillage of liquid from an inverted container of liquid, and containers with such a device the device, in one embodiment, having a body for securement to the container, the body having a fluid channel therethrough through which the liquid can flow and a movable closure member which, if not held against the body, moves away from the fluid channel so that fluid flow is not impeded and which, if pressure is placed against it, is held against the body to prevent fluid flow. In one embodiment, an air vent is provided through the body to facilitate flow. Another embodiment provides a frangible cover for an opening of a container of liquid and a container with such a cover. Another embodiment provides a container with a closure adhesively attached sealingly across its opening, the cover secured in one area by adhesive so that it will separate from the container in that area upon the application of force to the cover permitting fluid flow from the container.

Abstract: A closure for a rigid or deformable container. The contents of the container are protected by a seal. The closure has a bottom part and a cap fixed thereon by a hinge. The lower part is closed by a cover face, through which only a pouring spout extends. A tear-off element is positioned on an underside of the cap in such a way that it extends through the pouring spout as far as the seal located below it. The tear-off element is in active contact with the seal, for example, it is bonded or glued to it. At the time of a first opening, the tear-off element pulls the seal upwards, which is simultaneously broken by a cutting element below the pouring spout. Such closures are structurally simple in their manufacture as well as in operation and can be attached to various types of containers.

Abstract: Apparatus for mixing charges of flowable material has an open-top vessel movable up and down by fluid-operated motors along vertical guides, either with or relative to a cover which can seal the open top and is provided with an inlet for admission of fresh charges. The extent to which the cover is movable along the guides is limited by followers which are provided on the cover and extend into channels of the guides. The cover carries one or more rotary agitating devices with orbiting blades which mix the contents of the vessel while the open top is sealed by the cover. The central portion of the concavo-convex bottom wall of the vessel has an outlet normally sealed by a closure which is pivotable by a fluid-operated motor. The vessel is lowered away from the cover for the purposes of cleaning.

Abstract: A plastic perforative spout for dispensing substances through a sidewall of a plastic container includes a unitary rigid plastic, preferably teflon or polyethylene, perforation element with a protective cap, a dispensing valve removably attached to the perforation element, and an accessory circular adaptor for rounded containers. The plastic cutting element extends from a hollow shank surrounding an opening in a flange portion of a hollow tubular body. Two intersecting cross ribs are formed inside the shank, and a vertical rib extends from the intersection of the cross-ribs to the point of the radius cut semi-circular cutting element. The plastic dispenser is removably attached over the tubular body, and a boss is pressed to displace the flexible concave valve to dispense the container contents through the mouth of the dispenser. A snap lock holds the valve open if desired. The circular adaptor fits over the shank and defines a concave surface for mounting flush against a curved surface.

Abstract: A food storage container for dry or liquid foods and other open air perishable products provides a leak-resistant seal when the lid is in a closed position and easy pouring of contents when in the open position. The container is easy to open, employing rocker points to allow for a rocking action effective to release the lid from a closed position when a downward force is exerted upon an upper surface of the lid thereby providing an effective opening for pouring. A leak-resistant seal is achieved through the use of a plug section of the lid having a continuous outer peripheral surface which effects a close conforming fit with a similarly positioned surface area on the container body in a continuous and positive manner.

Abstract: A closure of a liquid container, such as plastic bottles or chemical bottles, has a cap made of a resilient material and provided with a central opening-and-closing protrusion erected. By fitting a stopper of a relatively hard material onto the cap and provided with an engagement part onto the cap, the contents of the container can be poured and kept at its pouring or dispensing condition after the protrusion is rotated and engaged or hooked with the engagement part by a thumb and finger of the operator or user of the bottle. It is easy to release the hooked or engaged condition of the protrusion of the cap to the lever of the stopper, permitting the contents to be stopped from dispensing instantly.

Abstract: A stopper for a dispensing container having a body portion from which a pour spout extends, which spout is closed by a cap and wherein the stopper further includes a diaphragm member for surrounding the spout and sealing the body portion thereof and which diaphragm also includes a vertically extending band having a slot therein for receiving a locking flange extending from the cap with the band being severable from the diaphragm upon opening of the cap to thereby provide a guarantee strip to indicate opening of the stopper.

Abstract: A closure is provided for use on a container. The closure includes a body for being mounted to the container over the container opening and defines a dispensing orifice. A separate lid is mounted on the body for pivoting between a closed position and an open position. A resiliently deformable biasing member extends from the lid and has a distal end for engaging the body. Restraining walls are provided on the body for restraining the distal end of the biasing member whereby the biasing member is most stressed when the lid is at an over center position between the open and closed positions to thereby bias the lid toward one of the open and closed positions.

Abstract: A child-proof container and a closure for selectively opening and closing the container. The hollow container has at its upper end a dispensing opening. The closure has a body member and a flip-top cap member attached by a hinge to the body member for movement between open and closed positions. The body member is supported and locked on the container to permit rotational movement of the body member on the container. The container has an annular locking rib for releasable locking engagement with a locking bead on the cap member to permit unlocking of the cap member from the container only when the body member is rotated to an unlocking position with respect to the container, whereby the cap member may be moved from a closed to an open position to permit dispensing of contents from the container. The container and the closure are provided with corresponding indicia to indicate the precise rotational alignment of the container and the body member to permit unlocking of the cap member from the container.

Abstract: A biased swivel closure is provided for a container and includes a cap cover which is pivotably mounted to a closure cap for pivoting between a closed position sealing a discharge nozzle and an open position. The cap cover is normally biased to the closed position by a pretensioning device which is connected between the cap cover and the closure cap. The pretensioning device includes an inverted V-shaped leaf spring having first and second legs which are spread outwardly in an arc shape in the untensioned state when the cap cover is removed from its mounting in the closure cap. When the cover is pivotably mounted in the closure cap and oriented obliquely downwardly and generally in the same plane and parallel to one another with the root connection of the two legs resting on a portion of the closure cap.

Abstract: The invention discloses a cap made of plastic material for containers holding liquids, which includes an essentially cylindrical main body and an element for dispensing the liquid. The dispensing element has an essentially round, flat upper part, hinged into the main body and a lower part in the shape of a socle having a partially cylindrical base surface which slides on a corresponding concave surface belonging to a main body. The contact between the cylindrical surface of the base and the concave surface of the main body insures the tightness. Moreover, around the opening of the concave surface of the cylindrical body there is a ring-shaped projection acting as a seal when the dispenser is in its open position. When the dispenser is closed, the ring-shaped projection matches a corresponding round indentation which is found in the base, so as to insure the tightness between the dispenser and the body of the cap, regardless of the position of the container.

Abstract: A side dispensing container closure cap is provided with a hinged lid extending to a side periphery of the cap and which is pivotable from a closed position to an opened position and which has depending side walls along the length of the pivotable portion forming a chute passage to the periphery of the cap, the chute passage has dividing walls between the side walls to define a plurality of chute-like passages. Stops are provided to allow partial opening of the pivoted portion and a reinforcing web interconnects the lower portion of the side walls and dividing walls.

Abstract: A method and apparatus are disclosed for delivering particulate material while minimizing the release of dust. The apparatus comprises a vertical conduit, and movable flap adapted to close the lower end of the conduit and a counterwieght or linear actuator for moving the flap to close the conduit whenever the quantity of material within the conduit drops to be predetermined level. The device operates so that a column of solid particulate material is maintained in the lower end of the tube at all times to prevent escape of dust.

Abstract: A screw on container closure has a hinged flap on a dispensing aperture for spooning out product. The flap and aperture have a sealing flash structure that provides a moisture resistant seal therebetween. An integral resilient sealing flange within the closure provides a moisture-resistant seal on the mouth of a container.

Abstract: A one-piece side dispensing closure for powdered, granular or particulate materials. The closure is molded from plastic and has a press-open dispensing lid.

Abstract: A circular funnel apparatus for industrial use with a closeable lid able to set securely on top of a standard 55 gallon drum. This apparatus consists of four different assembled pieces:1. A funnel with a supporting circular frame body with a cylindrical extruded drain in the bottom of the funnel, able to extend down into a standard bung hole of a 55 gallon drum.2. A hinged lid fastened to the funnel frame body capable of closing off the funnel by closing the lid or by lifting and rotating the lid 165 degrees opens the funnel into which paint materials can be poured.3. Fastened to the underside of the lid (attached 90 degrees or perpendicular to the lid) is a cylindrical rod. With the lid in the closed position, the rod is exactly centered over the cylindrical drain in the bottom of the funnel.4. Fastened to the end of the cylindrical rod, opposite the end which is attached to the lid, is a circular disk that serves as a plug to the cylindrical drain in the bottom of the funnel.

Abstract: An apparatus for closing a chute includes a chute for dispensing a granular material. A gate assembly is mounted for controllably opening and closing the chute and includes a bridge member with a curved gate attached to it. The gate assembly is movable between a first position and a second position. In the first position, the gate permits granular material to be dispensed through the chute and in the second position, the gate co-acts with a sealing member and the chute to prevent material from passing through the chute. In a highly preferred embodiment, the sealing member comprises a plurality of inwardly projecting curved ridges formed on the interior of the chute.

Abstract: A two piece dispensing closure for a container having an internally threaded base with a dispensing orifice in the front section and an elevated rear land that has a pivot recess adapted to receive a separate lid that rotates at least 90.degree. from the closed position. The front section of the lid is generally circular with a pivot post at its rear, and when closed the upper surfaces of the lid and base are coplanar.

Abstract: A food storage container for dry or liquid foods and other open air perishable products provides a substantially liquid-tight seal when the lid is in a closed position and easy pouring of contents when in the open position. The container is easy to open, employing a rocker points placed off-center of the container lid's centerline to allow for a rocking action effective to release the lid from a closed position when a downward force is exerted upon an upper surface of the lid thereby providing an effective opening for pouring. A substantially liquid-tight seal is achieved through the use of a plug section of the lid having a continuous outer peripheral surface which effects a close conforming fit with a similarly positioned surface area on the container body in a continuous and positive manner.

Abstract: A side dispensing container closure cap is provided with a hinged lid portion extending to a side periphery of the cap which is pivotable from a closed position to an opened position and which has depending sidewalls along the length of the pivotable portion forming a chute opened to the periphery of the cap. The sidewalls preferably are formed as conical sections to enhance sealing along the edge of the hinged portion. Detents may be provided at a spherical front surface of the hinged portion defining the dispensing opening allowing partial opening of the pivoted portion. Extra sealing areas are also provided to permit the closure to be used with liquids.

Abstract: A dispensing system for a container holding hardenable materials having a closure member, a platform area at the top of the container, an opening defined in the platform extending into the container to form a passage whereby when the closure member is in its open mode hardenable material passes through the passage from the interior of the container and is deposited on the top of the platform. When the closure member is in its closed mode, it is adapted to flatten the hardenable material on the platform, allowing the edges of flattened material to harden and to be manually removed for continued dispensing of hardenable material.

Abstract: A delivery chute flow control device is disclosed. The device has a body portion which mates with the remainder of the delivery chute. Affixed to one end of the body portion is a rotatable door which is used to control the flow of material. A locking mechanism is provided as a way of securing the door in a fixed position.

Abstract: A toggle-acting dispensing closure which is resistant to inadvertent actuation during shipping and handling prior to purchase. A deformable resistance post is provided on the body of the closure and interferes initially with the pivoting of the actuator except when a substantially higher force than normally used to pivot the actuator is applied. After the first operation by applying the substantially higher force, the actuator may be operated by the application of a customary lower operating force to the actuator.

Abstract: An adjustable metering dispenser apparatus having a container for holding free-flowing materials. The top of the container has at least one opening therein and a cap is provided for opening or closing the top. The cap is rotatable for allowing it to be moved between the open and closed position. A metering chamber is slidably disposed on the exterior of the container and is adjustable by telescoping it with respect to the container for adjusting the size of a chamber therein by such sliding motion. A closure is provided on one end of the metering chamber for selectively opening or closing it so that once the material has been measured in the metering chamber, it can be freely dispensed in a normal way.

Abstract: An injection-molded plastic dispensing cap providing a semicircular spoon opening through which spoonfuls of the contents of an associated container can be removed. The cap provides a hinged flap for closing the opening which is hinged to the body and movable between an open position and a closed position. The cap provides an inwardly extending lip along the periphery of the opening. A rib is formed on the flap to closely fit the lip along the opening when the flap is in the closed position. Projecting from the rib is a latch projection fitting under the lip to secure the flap in the closed position. The lip is provided with a central recess bridged by the latch projection. The lip and the latch cooperate to provide spaced and opposed latching portions which are relatively insensitive to variations in the torque applying the cap to an associated container and which are not adversely affected by removal of the cap from its mold while the cap is still relatively hot.

Abstract: A pouring spout for a package comprising a face plate which is positioned adjacent the upper end of one of the end walls of the package and which has an upper support extending horizontally inwardly from the upper end thereof over the top wall of the package. The upper end of the pouring spout is maintained in position by means of a pin extending downwardly through the upper support and through the top wall of the package. A pivotal spout is pivotally mounted on the face plate and is positioned in an opening which has been created in the upper end of the end wall of the package. The pouring spout includes a lower support which engages the inside surface of the package below the opening in which the spout is mounted to maintain the lower end of the pouring spout in position.

Abstract: This invention relates to a one-piece closure which has a lower part and a cap connected with a hinge. The side walls of the lower part are inclined from the cover surface to the exterior. A discharge spout penetrates the cover surface. The discharge spout is inclined and parallel to a side wall part in the area of the hinge. The specific geometry of the closure makes it possible to inject into a mold a one-piece hinge closure, with walls inclined outwardly, without using a slide unit. This invention also makes it possible to construct the lower part of the closure as a tube head.

Abstract: A plastic molded tamper-evident dispensing closure with a tamper-evident seal. The seal is integrally molded with the closure lid and projects downwardly from a peripheral edge of the lid into interlocking engagement with the body. A seal segment is disposed in a peripheral notch in the lid to evidence access to the contents of an associated container.

Abstract: An efficient, clean and inexpensive apparatus for adding fresh toner to a development station in an electrostatographic copier or printer includes a pivotable member for holding and transporting a container of such toner, without retouching, regrasping or directly rehandling such container, between a first position in which the container, substantially in an upright orientation, is non-slidably attachable to the pivotable member, and a second position in which the container is fully inverted over the development station automatically locating such container in place for toner therein to flow gravitationally into the development station.

Abstract: A convertible metering apparatus for dispensing metered quantities of different flowable goods of unlike physical properties comprises a housing defining a material storge chamber therein; a motor; and a drive shaft being rotatably connected to the motor and extending into the housing. There is further provided a metering member adapted to handle a flowable material of a first physical property; a discharge unit configured to receive the metering member therein; and a first releasable connecting arrangement for readily connecting the metering member to and readily disconnecting it from the drive shaft. This arrangement ensures that the metering member is readily replaceable by another metering member adapted to handle a flowable material of a second physical property.

Abstract: An elastomeric piston member of a product dispenser for semi-viscous liquids includes integrally molded priming valve structure as well as check valve structure. The priming valve comprises a number of generally flat, triangular segments arranged around the periphery of an outlet conduit leading from a pumping chamber, and during a pumping stroke of the piston member, outermost tips of each segment deflect laterally to allow discharge of products from the chamber. The triangular segments are molded in an open or spaced apart orientation to facilitate manufacture, and are biased by ribs of a discharge spout toward a closed, inclined orientation in contact with adjacent segments once the dispenser is assembled.

Abstract: The momentary position, between open and closed, of a bottom door panel controlling release of fluid from an airborne container containing the fluid is governed by both the height of the fluid in the container and the instantaneous position of the door panel.

Abstract: An apparatus for dispensing a beverage by gravity feed from a container mounted in the outside of a door of a refrigerated cabinet, such as a home refrigerator, comprises a vented spout assembly for dispensing a beverage from a container by gravity feed at a substantially constant flow rate in combination with an actuation mechanism mounted in the door of the refrigerator. The vented spout assembly includes a valve assembly collar connectable to a discharge opening in the container, a vent tube extending from a location in the collar to a location in the container spaced from the discharge opening, the vent tube defining a vent passage therethrough. The collar has a discharge wall with a liquid discharge port therethrough. A rotary valve element is mounted for rotation in the discharge wall between OPEN and CLOSED positions.

Abstract: A dispensing valve comprises a first body portion having a connecting assembly for joining to a fluid outlet. A second body portion comprises a relatively rigid, elongated member having a lateral side wall terminating in a free end. A discharge orifice is formed in the lateral side wall of the second body portion. Mounted on the second body portion in tightly encircling relationship to sealingly overlie the discharge orifice and prevent fluid flow therethrough is a resilient tubular member. An operating handle is joined to the tubular member for selectively and resiliently deflecting the tubular member away from the discharge orifice to permit flow therethrough.

Abstract: A one-piece, molded plastic, reclosable, pouring device adapted to be secured to an outer wall of a paperboard carton, adjacent an opening in said carton wall, to provide a tamper evident dispensing package for particulate type materials. The device includes a base member adapted to be located in the carton and secured to the carton wall adjacent the opening, and a cover member adapted to be located outside the carton and hingedly connected to the base member for snug engagement with the base member to provide a relatively tight fit therebetween upon reclosure of the package.

Abstract: A container closure is provided with a body defining a dispensing orifice and a cover disposed on the body for being pivoted between a closed position occluding the orifice and an open position spaced away from the orifice. A hinge connects the cover to the body. The body has a generally smooth applicator surface around the dispensing orifice. The cover has an inwardly projecting sealing protrusion for entering at least partially into the dispensing orifice and sealingly engaging the body at the periphery of the dispensing orifice when the cover is in the closed position. The body and the cover together cooperate to define latching means, such as (1) an engagement between the protrusion and a portion of the body around at least part of the periphery of the orifice or (2) engaging ribs on the body and cover for releasably holding the cover in the closed position.

Abstract: A closure is provided for a container. The closure has a body for being mounted over the container opening and defines an orifice for communicating through the container opening with the container interior. The body also defines a pair of spaced-apart bearing cavities. A lid is mounted to the body with a pair of trunnions for each being received in one of the bearing cavities. A compression link member has first and second ends with the first end connected to the body and the second end pivotally connected to the lid at a location spaced from the trunnion axis. The bearing cavities are configured and located to provide a clearance at least on opposite sides of each trunnion when the compression link member is in the full open position and in the full closed position.

Abstract: A plastic closure having a lower part and an upper part that fit together, the upper part being connected to the lower part by a film hinge. The upper part has, on its inner side, an extending portion with projecting sealing elements which form, with the outlet of a container, a sealing connection. The upper part is additionally connected with the lower part in a pivoting manner by a snap hinge. The snap hinge is connected with the upper part by a film hinge, and connected with the lower part by a film hinge. For purposes of opening, the film hinge connecting the upper part and the lower part is bent. The closure can be placed or screwed onto a container with its lower part. The closure can be produced in a closed condition.

Abstract: An adaptor for attachment to the spigot of a standard disposable "bag-in-box" container for liquids such as wine or milk is disclosed. The adaptor allows the user to conveniently dispense liquid from the spigot to a glass using only one hand. The adaptor incorporates a collar for attachment to the spigot, and a handle which is activated by pressure from the glass to open the spigot. The handle pivots on two horizontal arms extending from the collar. Connected to the handle are two downwardly extending arms which meet at a central horizontally projecting protuberance. By pressing the handle, the V-shaped arms are rotated upwardly and the horizontal protuberance is pressed upwardly against the toggle lever of the spigot.

Abstract: A tamper evident container closure has a skirt for permanent attachment to the mouth end of a container and a closure crown supported by the skirt. A cover on the closure is displaceable for exposing a well on the closure crown normally closed by the closure. The well has a floor which may be part of a crown panel of the container closure and the well floor has a dispensing opening therein. A rip-out tamper evident element is fixed in closing relation to the opening and requires destructive removal for dispensing access to the opening. A digitally manipulatable handle attached to the element is confined within the well in the closed condition of the cover and is accessible when the cover is displaced from the well for digital manipulation of the handle for forcibly destructively displacing the element from the opening. The portion of the cover over the well may have a sealing surface engageable about the well in the closed position of the cover.

Abstract: A removable package for dispensing syrup in a post-mix soft drink dispensing system and having an actuated closure mechanism. The package includes an upper body portion from which a lower discharge portion extends outwardly therefrom and which further includes an outwardly facing discharge port. The closure assembly includes a movable outer cap member pivotally attached to a facing member. The facing member fits over the discharge port and includes a syrup outlet opening and an air inlet opening therein. The cap member includes means for closing off both openings when in contact with the facing member. An actuator including a spring biased roller contacts the cap member such that when a dispensing operation is required, the cap member is swung outward by means of the roller away from the facing member, exposing the syrup outlet and air inlet openings. When the dispensing operation is completed, the roller forces the cap member back into contact with the facing member to reseal the openings.

Abstract: An improved dispensing container which includes side walls, a top wall, a dispensing spout and a closure removably securable to the spout. The closure includes a skirt portion adapted for removable securement to the spout, and with a cap hingedly secured thereto. The cap and a portion of the skirt have matable elements which in mating relationship releasably secure the cap in a closed position. The cap further includes a locking member which is matable with a member on the spout when the cap is in the closed position to preclude removal of the closure from the spout. In one embodiment, the closure further includes a top wall which defines an opening therein which serves to vent the container and at the same time permits squirt-type dispensing of the contents of the container. In such embodiment, the cap when closed closes the top wall opening. The closure is also claimed.

Abstract: The apparatus comprises a hydraulic unit mounted directly on the wall of the bottom of a rotary hopper and supplying hydraulic fluid to each of the jacks mounted on the hopper wall. This hydraulic unit is connected to an energy source on a fixed bracket located in the region of the bottom of the hopper, but which is independent therefrom. As the rotary hopper rotates, the hydraulic unit retains its connection with the energy source. The energy source activates the hydraulic unit, which subsequently opens the hopper.

Abstract: A container closure is provided with a structure that permits it to be readily disassembled and assembled for use on a container defining an opening communicating with the container interior. The closure includes a body and a cover separate from the body. The cover is adapted to be pivoted about an axis between a closed position occluding a dispensing orifice in the body and at least one open position spaced away from the dispensing orifice. An axis-defining structure is provided on either the cover or the body for defining the pivot axis of the closure, and also includes a cam surface around the axis. The other one of the cover or body is provided with a receiving structure for engaging the cam surface to mount the cover to the body for pivoting about the axis. Either or both of the cover and body is elastically deformable. The deformable structure is least stressed when the cover is at one of the open positions.

Abstract: A closure is provided for use on a container that has an opening communicating with the container interior. The closure includes a body for being mounted to the container over the container opening and for defining at least a first aperture communicating through the container opening with the container interior. The body includes a peripheral side wall outwardly of the first aperture. The closure includes a cover on the body for defining at least a first lid to cover the first aperture. The closure includes a first hinge for accommodating pivoting of the first lid between a closed position occluding first aperture and an open position spaced away from the first aperture and for connecting the first lid directly to another part of the cover or the body. The first lid includes a first engaging arm for engaging the body side wall when the first lid is in the open position.

Abstract: A valve structure formed from a single tubular plastic component having two integral tube sections. A first section includes a flow orifice. The second section constitutes the valve element for controlling flow through the orifice by being inverted relative to the first section to overlie the orifice in sealing relationship thereto. In the preferred embodiments of the specification, the second section is invaginated into a compressed position within the first section.