Class 425/156 - For timing period mold is closed or period molding pressure is maintained

Subclass of Class 425 - Plastic article or earthenware shaping or treating: apparatus
Definition: Apparatus in which the time period limited is that during
No. of patents: 34
Last issue date: 10/07/2008

Number	Title	Issue Date
7431870	Automated molding technology for thermoplastic injection molding A method for the automated setting-up of an injection molding machine, the machine for manufacturing injection molded parts and including an injection screw and a configurable injection velocity, including the steps of: manufacturing one of more parts with the machi...	10/07/2008
7311504	Apparatus for and method of transforming useful material into molded or extruded articles A material handling exit section in the nature of a material extruder and mold combination for shaping the material exiting a hydrolyzer, comprising an extrusion chamber and a plunger assembly attached to the extrusion chamber and further including a working cylinde...	12/25/2007
7101164	Containment system for continuous flow hydrolyzers A material handling system for a hydrolyzer comprises a material injection assembly having a ram; a sleeve in which the ram reciprocates during use; a gate plate operable from between an open position, wherein a plug of municipal solid waste may exit the sleeve, and...	09/05/2006
7018208	Dental device A device for the manufacture of a cast, in particular a dental aid from a preheated workable substrate. The device comprises a hollow body having an essentially flat first side being provided with holes which first side is arranged to receive a model from which a ca...	03/28/2006
6910596	Water bottle with handle A liquid storage bottle is provided with a generally cylindrical liquid storage chamber and an integral handle. A well is formed in the liquid storage chamber to accommodate the handle. The walls of the well are configured to prevent water from pooling thereon, and ...	06/28/2005
6780354	Method for casting using a casting head having a variably displaceable cavity surface A method employing a casting head having a variably displaceable cavity surface. The casting head comprises a cavity, at least partially formed by plurality of surfaces, including a carrier surface adjacent the cavity, and a variably displaceable drive surface for c...	08/24/2004
6589038	Constant pressure casting head using variably displaceable cavity surface A casting head having a variably displaceable cavity surface. The casting head comprises a cavity, at least partially formed by plurality of surfaces, including a carrier surface adjacent the cavity, and a variably displaceable drive surface for controlli...	07/08/2003
6267577	Transfer molding apparatus for manufacturing semiconductor devices A transfer molding apparatus, wherein a top-half mold and a bottom-half mold form a plurality of cavities interconnected, and wherein a pressure adjuster reduces the pressure of the cavities every time a specified amount of resin is supplied into any of t...	07/31/2001
5850107	Mold separation method and apparatus An apparatus for separating individual contact lens mold assemblies, the assemblies each being a front curve mold half and a back curve mold half, each mold half having annular circumferential flanges, is included. The apparatus includes a device for appl...	12/15/1998
5811037	Energy-saving method of operating an injection moulding machine A method is disclosed of operating an injection molding machine including a hydraulic device (1) which has an asynchronous main drive motor (10) driving a hydraulic pump (2). The injection molding machine is operated in an injection molding cycle with a c...	09/22/1998
5667192	Concrete panel construction and mold A mold especially adapted for forming precast, waffle-shaped concrete panels employs a one-piece mold body of flexible plastic sheet material to which rigid side rails are secured by tongue and groove longitudinal joints. The mold may be rapidly stripped ...	09/16/1997
5176859	Apparatus/and method for controlling an injection molding process producing a molded part An apparatus and method for controlling an injection molding device having a mold cavity therein use of periodically generated signals representative of the mold cavity pressure and mold cavity volume. These signals are used to control the magnitude of th...	01/05/1993
5119866	Method and apparatus for controlling a casting process by controlling the movement of a squeezing plunger A method and apparatus for controlling a casting process for obtaining a cast product from a cast substance injected into a die cavity of a pair of casting dies by a fluid-operated injecting plunger and pressurized by a fluid operated squeezing plunger af...	06/09/1992
5030395	Method and an apparatus for pressure control of a motor-operated injection-molding machine A method and an apparatus for pressure control of a motor-operated injection-molding machine, which are capable of effecting various modes of multi-stage pressure control smoothly without mounting a special servomotor on the injection-molding machine or r...	07/09/1991
4954063	Injection pressure control apparatus for a die cast machine and an injection mold machine This invention relates to an injection pressure control apparatus for a die cast machine and an injection mold machine. In the injection pressure control apparatus, it detects whether the pressure increase state of the instance when the pressure of the in...	09/04/1990
4720364	Method for injection molding fiber-reinforced thermoset plastic articles A technique directed to a process for injection molding fiber-reinforced thermoset plastic articles is disclosed. The technique includes forming a mixture of short lengths of reinforcing fibers with a thermosetting resin in a predetermined fiber-to-resin ...	01/19/1988
4714579	Method and an apparatus for the production of shaped articles Plastics-forming materials are shaped in a mold tool sealed by an associated closing unit. Lifting elements the stroke of which can be limited and controlled are associated with the mold tool. Shaping is accomplished by filling the mold cavity with reacti...	12/22/1987
4690629	Injection molding machine for small-sized articles An injection molding machine for small-sized articles of thermoplastic synthetic resin comprises a hydraulically pressurizable injection head cylinder operable on an injection cylinder of an injection unit for injecting molding material into a mold, a hyd...	09/01/1987
4439127	Machine for producing blown hollow synthetic resin workpieces A machine for the blow molding of synthetic resin hollow workpieces with a unit for shutting parted blow molds and with a turntable moved in steps, with a number of rests evenly spaced round the axis of the turntable for blown hollow workpieces. The rests...	03/27/1984
4427355	Core puller assembly This core puller assembly includes a bank of interconnected core puller units each having a cylinder, and a piston mounted within the cylinder and having a rearwardly extending connecting rod. Each core puller unit includes a core puller bar disposed in s...	01/24/1984
4392800	Press for pulverulent materials A press for compressing pulverulent materials into both concave and convex pieces includes a press frame, a die carying plate, upper and lower punches, holders for carrying the punches and control devices for controlling the displacement of the upper and ...	07/12/1983
4382762	Thermoforming apparatus and method Thermoforming equipment includes a solid state sensor adapted to determine when a sheet of thermoplastic material has been clamped between a forming mold and a heating platen. Clamping force is provided by a cutter blade carried by said mold around the pe...	05/10/1983
4381272	Method of and system for injecting a fluid into a plastified mass in an extruder An extruder system has an extruder provided internally with a worm. A source of an additive fluid under pressure is connected to a conduit opening into the barrel. An upstream valve and a downstream valve are provided in this conduit and a pressurizable f...	04/26/1983
4313668	Control circuit for a film processing apparatus A coiled roll of film, which exhibits curling, is provided with longitudinal corrugations at its leading edge by a film processing apparatus, thereby providing a straight film edge well adapted for insertion into a film development machine without requiri...	02/02/1982
4235833	In-the-mold coating apparatus and method A method and apparatus for forming a thermoset in-the-mold coating on a hot, cured glass fiber reinforced thermoset resin substrate by (1) separating the mold halves slightly while maintaining a seal with the shear edge, (2) injecting an in-the-mold coati...	11/25/1980
4171940	Leaderless film processing apparatus Strips of photographic film are processed through a film developing machine which transports the film by means of rollers. Curling of the film around the rollers of the machine is avoided even though no separate leader is attached to the film. This is acc...	10/23/1979
4147486	Mechanical press for molding plastic parts A mechanical press includes a plurality of cylinders to provide different fluid pressures to a lower mold against an upper mold to mold plastic parts. A pair of accumulators sequentially apply a low pressure to the cylinders for a predetermined time durin...	04/03/1979
4130385	Strip straightening apparatus The invention relates to the processing of photographic material such as photographic film which has a tendency to curl in roller type photographic processing equipment, without attaching a separate leader portion to the film. After removing the curl from...	12/19/1978
4076475	Pressure injection machine and method A plastic injection machine injects at an initial higher pressure, with the opening of the injection nozzle valve being delayed to allow injection pressure to build up. When the mold is filled, the pressure applied by the machine is shifted to a low holdi...	02/28/1978
4019845	Control system for injection-molding machine An injection-molding machine has a drive ram with a pressurizable chamber that can be connected either to the high-pressure side or the low-pressure side of a source of fluid under pressure. A control system operating this machine has a pressure-reducing ...	04/26/1977
3964850	Thermoplastic sheet pressure forming machine An apparatus for forming and cutting thermoplastic sheets comprises a heater platen and base plate assembly with a toggle leverage assembly which brings the base plate assembly into and out of a closed relation with the heater platen with a sheet of therm...	06/22/1976

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Class 425/156 - For timing period mold is closed or period molding pressure is maintained