Abstract: A champagne bottom plastic bottle having the bottom reinforced by internal radiating ribs which are formed by solid material. The bottle is formed in the customary manner by utilizing a preform which has molded on the inner surface thereof longitudinal ribs. The preform is formed by conventional injection molding equipment which has been modified only to form along the lower part of the customary core member longitudinally extending rib forming grooves.

Abstract: A method for treating plastic containers with a resin to improve barrier properties thereof including conditioning with an ionizing gas, dipping container in latex of barrier resin and drying container including removing drop from bottom thereof. Apparatus for carrying out the process is shown.

Abstract: A method and apparatus for the forming of a champagne bottom plastic bottle wherein the bottom is reinforced by internal radiating ribs which are formed by solid material. The bottle is formed in the customary manner by utilizing a preform which has molded on the inner surface thereof longitudinal ribs. The preform is formed by conventional injection molding equipment which has been modified only to form along the lower part of the customary core member longitudinally extending rib forming grooves.

Abstract: A method for treating plastic containers with a resin to improve barrier properties thereof including conditioning with an ionizing gas, dipping container in latex of barrier resin and drying container including removing drop from bottom thereof. Apparatus for carrying out the process is shown.

Abstract: This disclosure relates to a plastic bottle having a bottom structure of the champagne bottle type. The bottom is reinforced by radiating ribs which are circumferentially spaced and the ribs, utilizing a minimum of material, stiffen the bottom so as to prevent the domed inner section of the bottom from reverting and also greatly resist creep of the bottom under the influence of time and internal pressure. The ribs may be only across the juncture section between inner and outer sections of the bottom, or may extend entirely from the outer section across the juncture section and substantially to the domed center of the domed section. The ribs may also be upstanding and serve to function as guides for a liquid product being placed into the bottle so as to reduce turbulences and aid in expediting the filling operation.

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: 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: 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: This relates to the heating of polyethylene terephthalate by way of RF energy. It has been found that if polyethylene terephthalate articles are passed through a radio frequency energy field, the molecules thereof will become excited and rapid heating will result. This heating is particularly useful in the heating of preforms prior to the blow molding thereof and by varying the configuration and relationship of electrodes, controlled heating of the preforms may be effected with it being possible to have a controlled temperature differential along the length of the preform or other article so heated.

Abstract: This relates to a blow molding system wherein a plurality of preforms are simultaneously blow molded within a mold set with the preforms being carried by one or more carriers which move first to a loading station to receive preforms, then through an oven to heat the preforms, then into a mold set wherein the plural preforms are simultaneously blow molded, then to an ejection station where the blow molded articles are discharged, and finally back to the loading station. There are two mold sets which are part of a clamp which operates sequentially to open and close each mold set with one mold set being closed as the other mold set is being opened. The carriers may travel either in a single continuous path for sequentially positioning at first one mold set and then the other, or there may be two continuous circuits for the carriers in which event the two mold sets of the clamp may be different.

Abstract: This relates to the heating of polyethylene terephthalate by way of RF energy. It has been found that if polyethylene terephthalate articles are passed through a radio frequency energy field, the molecules thereof will become excited and rapid heating will result. This heating is particularly useful in the heating of preforms prior to the blow molding thereof and by varying the configuration and relationship of electrodes, controlled heating of the preforms may be effected with it being possible to have a controlled temperature differential along the length of the preform or other article so heated.

Abstract: This disclosure relates to an unexpected increase in the strength of a bottle bottom of the champagne type by the addition of ribs internally of the preform when the preform is axially stretched prior to the blowing thereof within the blow mold. Most particularly, by adding internal ribs to the interior surface of the bottom defining portion of the preform, the preform has the bottom forming portion unduly strengthened against shrinkage in wall thickness when the preform is axially lengthened through the use of a stretch rod. The net result is that the stretching of the preform and the thinning of the wall is held to a minimum in the bottom forming portion of the preform and is transferred primarily to the body forming portion of the preform where lesser wall thickness does not unduly detract from the strength of the bottle.

Abstract: This disclosure relates to an unexpected increase in the strength of a bottle bottom of the champagne type by the addition of ribs internally of the preform when the preform is axially stretched prior to the blowing thereof within the blow mold. Most particularly, by adding internal ribs to the interior surface of the bottom defining portion of the preform, the preform has the bottom forming portion unduly strengthened against shrinkage in wall thickness when the preform is axially lengthened through the use of a stretch rod. The net result is that the stretching of the preform and the thinning of the wall is held to a minimum in the bottom forming portion of the preform and is transferred primarily to the body forming portion of the preform where lesser wall thickness does not unduly detract from the strength of the bottle.

Abstract: This disclosure relates to improvements in the cross section of a bottom end of a plastic bottle suitable for packaging liquids under internal pressures. The bottom end is primarily one which includes a generally hemispherical bottom wall having projecting therefrom in circumferentially spaced relation hollow legs terminating in supporting feet. The bottom end is stiffened against creep of the plastic material over a period of time under the influence of the internal pressure by changing the configuration of the bottom wall from that of a hemisphere to one which includes a configuration of straight line sections and curved line sections when viewed in radial cross section along the axis of the bottle.

Abstract: A container formed of synthetic resinous material having a bottom structure the outer surface of which comprises a central concavity and a convex heel, the heel surrounding the concavity and merging therewith and with the container sidewall. A plurality of hollow convex ribs, distributed in a symmetrical array, interrupt the outer surface of the concavity and merge smoothly therewith, each rib extending longitudinally in the direction of the heel and downwardly from an inner portion of the concavity. The wall of the bottom structure generally decreases in thickness progressively from the innermost point of the concavity to the sidewall.