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| Number | Title | Issue Date |
| 4464980 | Bellows actuator A blow-molded bellows of a thermoplastic elastomeric material has a generally cylindrical hollow accordion-type convolution section and ends integral therewith. The ends has axial protrusions extending outwardly from the central areas of respective ends. ... | 08/14/1984 |
| 4409176 | Method for moulding an article from plastic material An article (11) of thermoplastic material is moulded from a parison (10) in which certain parts (17,16) of the parison are re-formed while other parts (13,12,20) retain their shape. A difference in pressure is applied to the wall of the parison during the... | 10/11/1983 |
| 4382905 | Injection mold dwell cycle Method for the preparation of oriented hollow articles of moldable organic plastic material which is characterized by a rapid operating cycle and a final article free from objectionable capacity. The disclosure teaches an injection molding station for con... | 05/10/1983 |
| 4379099 | Method for producing polyester container Spherulites are grown in such sections as neck, neck end, and bottom center or bottom periphery of a hollow bottle-shaped container of biaxially oriented-blow molded polyethylene terephthalate where the resin is not substantially subjected to orientation,... | 04/05/1983 |
| 4375442 | Method for producing polyester container Spherulites are grown in such sections as neck, neck end, and bottom center or bottom periphery of a hollow bottle-shaped container of biaxially oriented-blow molded polyethylene terephthalate where the resin is not substantially subjected to orientation,... | 03/01/1983 |
| 4373891 | Apparatus for cooling a transfer mandrel An apparatus for cooling a transfer mandrel on whose top portion a thermoplastic resin parison is mounted and which is rotatably engaged with the peripheral portion of a rotary table. The apparatus is arranged along the peripheral portion of the rotary ta... | 02/15/1983 |
| 4356142 | Injection blow molding pet products Method for injection blow molding transparent hollow objects from a polyethylene terephthalate melt comprises molding from a melt at 530°-575° F. into a parison, quickly and relatively uniformly cooled by parison mold elements, at 75°-150° F., to... | 10/26/1982 |
| 4325687 | Device for expanding heat-shrinkable polymer tubes A device for expanding heat-shrinkable polymer tubes includes inlet and outlet chambers coaxially and consecutively arranged for immediate contact in the direction of tube advancement. Each chamber is made up of adjoining bushes having threads at the inne... | 04/20/1982 |
| 4318882 | Method for producing a collapse resistant polyester container for hot fill applications A collapse resistant polyester container is provided for hot fill applications employing product fill temperatures up to about 190° F. (87.8° C.) or more. The container has at least one region which is thermoelastically deformable inwardly after the con... | 03/09/1982 |
| 4285657 | Injection blow molding apparatus Molecular biaxially oriented hollow articles are obtained by injection blow molding using a novel apparatus. The technique involves the use of an inline, single stage injection blow molding apparatus wherein injection molding and cooling, and conditioning... | 08/25/1981 |
| 4272233 | Mold for producing extra thin walled plastic containers In the manufacture of extra thin walled plastic containers the tail flash formed during the molding operation is spaced from the container proper by molding one or more standoff projections into the flash. This maintains the tail flash in an appropriate r... | 06/09/1981 |
| 4242300 | Method for processing parisons Disclosure teaches a method for rapid processing parisons, especially a method for maintaining a relatively elevated inside temperature of said parison at the time of its removal from the parison mold characterized by removing the core from the parison wh... | 12/30/1980 |
| 4235837 | Method of making oriented containers Production of oriented polyethylene terephthalate containers by injecting a polyethylene terephthalate composition into a first mold chamber defining a parison having an axis substantially defined by a core rod and perimeter defined by the wall of the mol... | 11/25/1980 |
| 4233022 | Apparatus for forming heat treated blown thermoplastic articles A method and apparatus are disclosed for developing a strain crystallized morphology in blowbottles of thermoplastic material by a heat treatment process subsequent to a blow molding operation. In a first embodiment, the blow mold itself includes means fo... | 11/11/1980 |
| 4221759 | Process for the production of hollow articles from preforms of a thermoplastic A process for the production of hollow articles from preforms of a thermoplastic material, one open end of which preforms has a neck moulded at least partially into its definitive shape. During the final blowing operation, the region corresponding to the ... | 09/09/1980 |
| 4219526 | Method of blow-molding hollow shaped articles, including intermediate tempering and final biaxial stretching stages Plasticized parisons of synthetic thermoplastic material are formed in an extrusion machine from where they are transferred to a station to be pneumatically converted in the cavity of an open-and-shut premold into hollow blanks which are larger than the p... | 08/26/1980 |
| 4206171 | Method for thermal conditioning a thermoplastic parison An improved shell mold and method are provided for thermal conditioning a thermoplastic parison prior to blow molding the parison into a hollow container and especially a biaxially oriented container. The mold has an inner shell and an outer shell definin... | 06/03/1980 |
| 4176413 | Unitary, integral plastic tank and rim for a toilet, and method for making same An integral, unitary plastic tank and rim flush for a toilet are disclosed, along with the apparatus and method of manufacture. The tank includes a bottom wall and sidewalls, one of which is integral with an essentially tubular water passageway. The rim i... | 12/04/1979 |
| 4170622 | Method of making a blown hollow article having a ribbed interior surface A method is disclosed for reinforcing hollow articles, such as bottles, blow molded from a heated thermoplastic material. A hollow parison is preformed with concave grooves in its exterior surface and corresponding ribs on its interior surface at location... | 10/09/1979 |
| 4155974 | Method for making oriented hollow plastic articles Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded... | 05/22/1979 |
| 4151249 | Method of making a blown bottle with internal ribs A method of making blown plastic containers having internal ribs is disclosed. The first step of the disclosed method is to prepare a substantially amorphous blowable plastic parison such that a major portion thereof is at a temperature within the orienta... | 04/24/1979 |
| 4145392 | Method for the preparation of hollow plastic articles Method and apparatus for the preparation of hollow plastic articles wherein an improved injection blow molding process is obtained and improved temperature control of the parison is obtained by the use of a plurality of molds and cores. At least one tempe... | 03/20/1979 |
| 4117050 | Method for heating and blow molding plaster parisons A method for blow molding containers and the like articles from thermoplastic parisons. The parisons are heated in two stages, i.e., in a pre-heating oven to a uniform temperature less than the blow molding temperature and by infra red radiation to a fina... | 09/26/1978 |
| 4079111 | Method of forming thermoplastic containers Method of forming a container in a collapsed or folded configuration from a thermoplastic material. A preform is made from an extruded tube of thermoplastic material in a preform mold. The preform is then transferred to a deformation mold. The preform has... | 03/14/1978 |
| 4070429 | Method for forming a blown plastic container A method is disclosed for forming a plastic container by a blow molding operation. In the method, a tubular thermoplastic parison is blown to a preform within a first mold by a blow pipe inserted into one axial open end of the parison. Prior to removing t... | 01/24/1978 |
| 4054629 | Transfer blow molding technique Parisons are injection molded using a cooled cavity and a relatively hot core pin to prevent the formation of residual internal stress in or near the inner surface of the parison. The parison is promptly transferred while still hot from the injection mold... | 10/18/1977 |
| 4054630 | Hot pin parison injection molding technique Parisons for use in making blow molded highly molecularly oriented plastic bottles are injection molded using a cooled cavity and a relatively hot core pin to prevent the formation of residual internal stress in or near the surface of the parison. The pin... | 10/18/1977 |
| 4050887 | Method and apparatus for temperature conditioning parts Apparatus for temperature-conditioning workpieces comprises a series of bar assemblies for supporting a number of elongated molded parts in side-by-side relationship, heat transfer assemblies including horizontally spaced panels extending along a chamber,... | 09/27/1977 |
| 4044086 | Method for making a blow molded oriented plastic bottle A molecularly oriented article having a tubular sidewall is blow-molded from a thermoplastic parison which is heat-treated prior to blowing to provide the parison sidewall with a temperature gradient wherein the temperature of the inside of the sidewall i... | 08/23/1977 |
| 4021519 | Method for forming and keeping molten the recessed area of a fabricated plastic product In a blow-molding operation, a method of forming a recessed area in the exterior wall of the parison and maintaining the recessed area in a heated condition while the remainder of the parison is formed and cooled. Also an apparatus (ram means) employed in... | 05/03/1977 |
| 4020137 | Method of injection moulding hollow preforms In an injection moulding process for forming hollow preforms on a mandrel which is subsequently used as a blowing pin for blowing the preforms to the final shape in a blow mould separation of the preform from the mandrel during cooling of the preform from... | 04/26/1977 |
| 4018860 | Injection blow molding with improved cooling This invention cools the blowing mold and the plastic article blown therein to shorten the time that a core rod must remain at a blowing station of a blow molding machine for making plastic articles. The cooling is performed by conditioned air that is dri... | 04/19/1977 |
| 3989784 | Method of making blow molded plastic articles A method of making blown plastic articles of non-circular cross-section, having convex exterior portions, such as a bottle of rectangular or oval shape, or having localized protuberances. The article is blown from a pre-form of inverted shape, i.e., the c... | 11/02/1976 |
| 3985850 | Adjusting parison alignment by temperature control of picker finger An open end parison preform is heated to molding temperature preparatory to transfer to a molding station. The thus heated parison is grasped by a pair of opposed picker fingers and transferred into position over a neck forming plug. The relative temperat... | 10/12/1976 |
| 3983199 | Method for making plastic articles having blown and non-blown portions A method particularly adapted for making pinched-shut, non-blown portions of a blown article, e.g. the non-blown handle openings in a blown plastic jug including engaging a localized portion of a blowable shape, which portion corresponds to a non-blown po... | 09/28/1976 |
| 3980744 | Extrusion of hollow articles through a lubricated die A method for producing hollow articles comprises extruding a thermoplastic material, initially in a molten state, through a lubricated die having a mandrel for constraining the material into a tubular shape, cooling the outer surface of the material durin... | 09/14/1976 |
| 3979491 | Process for the manufacture of an oriented container Method for molding plastic articles by forming a parison on a core within an injection mold, cooling the internal and external walls of the parison thus formed by heat transfer through the core and the injection mold, transferring said core to a delay pos... | 09/07/1976 |
| 3959426 | Method of transferring and aligning parisons using clamping jaws with offset tines A method employing a parison transfer device which comprises a pair of opposed clamping jaws with offset tines disposed so as to extrude polymer laterally between said tines to form a flange at right angles to the axis of the parison so that on transfer t... | 05/25/1976 |
| 3957934 | Forming molecularly oriented containers from preforms In a method of conditioning preforms to be molded into containers which includes feeding them in groups to a temperature-conditioning zone where they are reduced to orientation temperature for immediate molding into containers, improvements are provided w... | 05/18/1976 |
| 3947176 | Double injection mold with neck gating A parison for blow molding is applied to a core rod by successive injection operations in different injection molds. The material for the first layer is injected into the end of the mold cavity remote from the neck portion of the core rod, in the usual ma... | 03/30/1976 |
