Abstract: A closure for a can in which the can comprises a circumscribing curl which interlocks with a sealing flange breakable upon lifting of the closure and which serves to hold the closure in closed position.

Abstract: This relates to the forming of containers and like hollow articles from sheets or webs of thermoplastic material. Two webs or sheets are simultaneously acted upon by way of a forming apparatus which includes a reciprocating clamp first cooperable with one outer platen and then the other in sequence wherein, while a first web or sheet is being formed within a plurality of mold cavities to define a plurality of hollow articles such as containers, the other sheet or web may be stripped from its respective mold set and a new sheet or a new portion of a sheet or web may be advanced into position for molding. The forming apparatus may be constructed in a manner wherein the web portions which are to be formed may be billowed away from the mold cavities as an initial step in the stretching and orientation of the thermoplastic material.

Abstract: This relates to a blow molding apparatus wherein plural preforms are directed to plural cavity blow molds by way of a pallet which supports the preforms by neck portions thereof. The pallets are positioned relative to blow molds of a set by way of a track. The track is transversely shiftable to present preforms transversely of the blow mold halves prior to the closing of the blow molds and there is associated with supports for the track wedge members which automatically lower the track relative to the blow molds more closely to position a supporting flange of each preform with respect to the upper surface of the blow molds. The track is finally further moved downwardly to engage the support flanges of the preforms with the top surfaces of the blow molds under controlled pressure conditions by means of fluid cylinders. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: A novel pressure holding container formed of thin sheet metal of the order of between 10 and 4 mils wherein the container has a bottom portion and a top portion, the bottom portion having a body and an integral bottom, and in one embodiment having a necked-in upper end of the body which tightly fits into a lip portion of the lower end of the top portion and is adhesively bonded thereto and wherein the upper portion of the top portion has a toro-conical shape which under pressure wants to expand it into a spherical shape and thus through beam loading on the lip portion imposes compressive stresses thereon and holds in compression the adhesive which is interposed between the lip and the annulus of the necked-in portion of the body which is loaded in tension by the internal pressure in the container. In another embodiment of the invention, the body has no necking-in at its upper edge and is of uniform diameter from end to end and is tightly fitted into the lip of the upper portion and adhesively bonded thereto.

Abstract: An adhesive composition for bonding polished metal surfaces to vinyl chloride polymer coated metal substrates is disclosed which is comprised of a thermoplastic vinyl chloride polymer resin, a thermosetting epoxy resin normally incompatible with the vinyl chloride polymer resin and an amount of an acrylonitrile/butadiene/styrene copolymer which imparts compatibility between the epoxy resin and the vinyl chloride polymer.

Abstract: This relates to an annular seam between two tubular body portions. The seam is particularly adapted for joining open ends of two cup members to form a container. The seam incorporates a hem on one of the members with the hem facilitating the application of the adhesive required to bond the cup members together while at the same time permitting the same adhesive to engage raw edges of the cup members in sealing relation.

Abstract: This relates to an injection nozzle which is provided with a valve gate pin for selectively interrupting plastic flow therethrough. The internal construction of the nozzle is such that the plastic flowing therethrough for injection into an injection mold is uninterrupted and in no way divided so that there will be a separation of the plastic and a rejoining in a manner which will provide for a welded interface. The valve gate pin, notwithstanding the uninterrupted flow passage, is fully supported throughout its length.

Abstract: In a mass conveying system a variable branch of an electrical bridge network is sensitive to changes in the numerical density of articles within a predetermined portion of the system. The bridge network is responsive to an imbalance therein to generate a signal corresponding to the imbalance. Means responsive to the signal act to control delivery of articles to the system.

Abstract: This relates to a blow molding apparatus wherein in lieu of the mold halves closing on a preform and thereafter the blowing operation initiated, the preform is shifted into one of the mold halves and thereafter advance of the stretch rod into the preform and movement of the blow head to a position closely adjacent the preform is effected before the closing of the mold is completed. Such arrangement permits a reduction in cycle time. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: A closure for a container wherein the closure is made of plastic and is attached to the container by means of a web and bead, the bead being held captive within a channel which is inscribed within the pour opening and the bead, providing a sharp edge and being arranged in such manner with the pull tab which is adapted to release the closure to concentrate the forces against a sharp cutting edge provided on the channel.

Abstract: This relates to a heating system and process for reheating preforms prior to delivering the preforms to a blow molder. The heating system utilizes different types of heating units, one of which will heat the preform wall more highly at the interior surface and the other of which will heat the preform wall at the exterior surface. By effectively controlling the heat input to a preform from each heating unit and by controlling the outputs of the different heating units in combination, the desired temperature profile through the preform wall may be obtained substantially without any time in the oven being provided for heat equilibration and at the same time a maximum heating effort may be effected to produce the necessary heating of a preform within a minimal time and more uniformly than heretofore possible.

Abstract: This relates to a cap for use in combination with a container body formed of plastics material. The cap has a domed central panel so as to withstand high internal pressures and has a cylindrical mounting portion which is telescoped within the container body and a further cylindrical securing portion which is secured to the upper terminal portion of the container body by means of a removable tape.

Abstract: A plastic closure and metal neck structure of a container, having resealable interlocking portions and wherein the closure has a pull tab which not only provides a sanitary cover for the pouring lip of the neck but also functions to pull the plug of the closure out of the pouring bore of the neck.

Abstract: This relates to an improvement on a recently developed ribbed preform in a champagne type bottle bottom formed therewith including solid internal ribs. In accordance with this invention, the ribs are made hollow or tubular in the preform with the resultant ribs in the bottle bottom also being hollow. The hollow ribs of the preform serve the same purpose as the prior solid ribs in retaining the plastic material of the preform in the bottom area during the bottle formation and the hollow ribs in the resultant bottle also provide the desired added stiffness for preventing bottom eversion.

Abstract: This relates to a blow head to be utilized in combination with a multiple cavity blow mold for introducing blowing gas to the individual preforms positioned within the mold cavities. There is a blow head for each mold cavity and each blow head, although the blow heads are carried by a single blow beam, are actuated to supply blowing gas only if a preform is present within the respective mold cavity. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: A seamless metal container including a body and an integral bottom wherein the bottom has controlled distension characteristics. The bottom is joined to the body by a radius and the bottom has a flat central portion offset inwardly into the body and being joined to the radius by an annular generally frustoconical radially outer portion. The offset of the flat central portion into the interior of the body is less than the thickness of the metal of the bottom and is such that in conditions of use under pressure with the bottom distended, the bottom becomes flat.