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4147487 |
Heating system for the manufacture of plastic articles
Apparatus is disclosed for heating thermoplastic parisons to a substantially uniform temperature across their wall thickness prior to a blow molding operation. The parisons are rotated about their...
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4144298 |
Method of forming strain crystallized thermoplastic articles
A method is disclosed for conditioning strain hardenable thermoplastic materials, such as polyethylene terephthalate, so that a highly developed strain crystallized morphology may be established...
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4141680 |
Rotary stretch blow molding apparatus
A continuous motion stretch blow molding apparatus for blow molding hollow articles from tubular parisons. A rotary parison loading turret loads parisons sequentially onto a plurality of stretch...
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4140481 |
Oven with improved parison rotating means
A tubular parison heating oven having a conveyor passing therethrough with parison holders rotatably mounted thereon for supporting the parisons in a vertical position. A toothed wheel is fixed to...
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4122138 |
Method of preparing blown thermoplastic articles having multiaxial orientation
A method for manufacturing blown articles is disclosed wherein the article is manufactured from a parison having a high degree of multi-axial orientation. The method permits molecular orientation...
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4116609 |
Apparatus for the continuous production of oriented hollow bodies
Apparatus for the continuous production of oriented hollow bodies from a thermoplastic, which includes a device for the production of a continous tubular parison from a thermoplastic. There is also...
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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...
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4117062 |
Method for making a plastic container adapted to be grasped by steel drum chime-handling devices
Disclosed is a method of making a hollow plastic article by blow molding, followed by reshaping said article by mechanical means outside the blow mold. Also disclosed is a plastic drum having an...
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4112795 |
Process for perforating plastics tubes
A process for perforating plastic tubes, in particular thin-walled corrugated tubes, by a punching or cutting operation wherein the plastic tubes are subjected to a direct or indirect treatment by...
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4102626 |
Apparatus for manipulating parisons in blow molding machines
A tempering mold for parisons which are formed in a parison mold and are about to be introduced into a blow mold has a tubular section open at one end and a second section reciprocable in the other...
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4091059 |
Method for blow molding and cooling plastic articles
A technique for internally cooling a blow molded article with a coolant comprising a mixture of subzero temperature dry air and water. A pressure swing dessicant bed type dryer and chiller are used...
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4087227 |
Mold 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...
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4080133 |
Apparatus for forming synthetic plastics bodies by blow moulding
An integral blow-moulding machine heats and extrudes plastic parisons having variable wall thicknesses directly between the opened half moulds of a continuously rotating ferris wheel type blow...
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4079104 |
Method for heating plastic articles
A method are disclosed for heating thermoplastic parisons to a substantially uniform temperature across their wall thickness prior to a blow molding operation. In the method, the parisons are...
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4076071 |
Method for heating plastics materials
Workpieces of a synthetic plastics material are heated to enable further lding thereof to be effected. Heating is effected by infra-red radiators and, in order to ensure that localized overheating...
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4063867 |
Injection and blowing machine for manufacturing hollow bodies of plastics material
Machine for injecting and blowing a plastics material into hollow bodies. It comprises a rotary polygonal-sided turret which carries on each side a set of support members for the plastics material...
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4057386 |
Means for controlling temperature of picker fingers to adjust parison alignment
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...
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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...
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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...
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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...
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4047869 |
Apparatus for forming plastic articles
A system and method for forming elongated and involute thermoplastic articles is disclosed. Means are provided for controllably heating a sheet of thermoplastic material to form preselected...
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4043735 |
Balloon blow molding tooling
This invention relates to blow molding apparatus for making plastic articles. It circulates cooling fluid through core rods for cooling blown articles from the inside, preferably with the blown...
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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...
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4040233 |
Method of obtaining a filled, fluid barrier resistant plastic container
A filled, fluid barrier resistant plastic container is obtained wherein the container is exposed to a temperature in excess of 175° F., as for example being filled with a material maintained at...
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4036927 |
Preparation of molecularly oriented containers using reheat process
Molecularly oriented containers are formed from molded preforms made of an amorphous thermoplastic resin and having a finished neck tubular portion and a body portion which method includes...
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4036926 |
Method for blow molding a container having a concave bottom
A method of making a concave bottom on a blown thermoplastic container. A blowable pre-form is initially expanded against a composite mold surface defined by the end faces of a plurality of...
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4019849 |
Rapid parison cooling in injection blow molding
An injection molded parison is slightly preblown from the core rod and cooling water is then circulated both externally and internally on the parison so as to effect a rapid temperature decrease in...
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4005969 |
Apparatus for longitudinal stretch for blow molding
This injection blow molding machine has special provision for maintaining the plastic of a parison on a core rod at the orientation temperature of the plastic; and stretching the plastic of the...
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3998577 |
Temperature controlled core rod
A core rod for an injection molding machine having an axially disposed blow air conduit connected to a valve at the free end of the core rod, and an annular passageway around the air conduit for...
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3997642 |
Method for transferring and heating a deformed and one-sided wall-thickness parison
A blow molding method for transferring and heating deformed and one-sided wall-thickness parisons in which each heated parison is expanded in conformity with the mold after being stretched or just...
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3994649 |
Apparatus for making plastic containers
A method and apparatus for the production of plastic containers, especially injection blow molded containers having a preformed inner lining which is applied to the blow core prior to formation of...
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3994655 |
Blowmolding machine
A molding machine into which nested stacks of preforms or parisons at ambient temperatures are loaded, which denests and applies the preforms individually onto complementary shaped mandrels in the...
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3990827 |
Apparatus for making corrugated plastic pipe with integral coupler collars
Apparatus for continuously making corrugated plastic pipes having enlarged coupler collars on one end thereof by continuously extruding a tube of plastic material into a molding zone especially...
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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...
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3982872 |
Lateral transfer loading apparatus for stretch blow machines
A lateral transfer preform loading method and apparatus for stretch blow molding machines. The method of the present invention incorporates the principle of laterally shuttling a set of finished...
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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...
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3973897 |
Forming molecularly oriented containers from preforms
In apparatus for conditioning preforms to be molded into containers which includes a temperature-conditioning assembly for bringing the preforms to orientation temperature and a supply assembly...
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3970419 |
Apparatus for controlled processing of blown plastic articles
A method and apparatus for forming hollow objects of moldable organic plastic material by providing a parison on a blow core, locating said blow core bearing said parison in a blow mold, expanding...
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3966378 |
Apparatus 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...
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3964856 |
Vacuum moulding techniques
Apparatus and method for thermoforming two or more plastics sheets simultaneously, to form in one operation a double-walled cup, or a composite walled cup, or a plurality of single-walled cups. The...
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3963399 |
Injection-blow molding apparatus with parison heat redistribution means
Method and apparatus 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...
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3963404 |
Method and apparatus for multiple blow molding with rotary turntable
A method and apparatus are provided for multiple simultaneous blow molding operations for forming hollow objects such as containers, the method and apparatus employing at least two...
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3950459 |
Continuous process for producing, reheating, and blow molding parisons
The process comprises heating a hollow thermoplastic parison to orientation temperature ranges by selectively applying radiant heat to at least three portions of the parison. The thus irradiated...
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3944643 |
Method for manufacturing shaped articles by injection-blow molding
A method for manufacturing shaped articles by injection-blow molding. A thermoplastic material is first formed into a bottomed parison by injection-molding said material onto the surface of an...
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3941539 |
Injection blow molding apparatus and method
Injection blow molding equipment for the production of hollow articles wherein cores are axially inserted in blow molds and blank molds is disclosed. Compact core assemblies and fluid supply...
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3941546 |
Apparatus and process
In the apparatus for preparing heat-shrinkable plastic tubing by radially expanding lengths of plastic tubing to a larger diameter within a rigid cylinder by heating the cylinder externally and...
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3940231 |
Apparatus for making blown plastic articles
The present invention provides an apparatus for thermally conditioning a blowable shape or parison, prior to blow molding, so that a subsequent blowing operation can be carried out under conditions...
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3937610 |
Mist cooling of inside of blown plastic articles
This invention decreases the time required to cool a plastic article, in a blow molding cavity, by circulating a mist in the inside of the blown article. Globules of liquid in the mist contact with...
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3933417 |
Apparatus for forming multiaxially oriented containers
Multiaxially oriented containers are formed from an extruded, molecularly orientable thermoplastic parison having a programmed wall thickness. The parison while at extrusion temperature is sealed...
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3932096 |
Mold for thermoforming plastic sheet material
A molding apparatus for thermoforming plastic sheet material having upper and lower matching molding blocks, each molding block having a thin rigid shell. The shell has a die cavity therein with...
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