Class 65/318 - With means varying plunger pressure during pressing

Subclass of Class 65 - Glass manufacturing
Definition: Apparatus including means to vary the pressure applied to
No. of patents: 31
Last issue date: 07/26/2011

Number	Title	Issue Date
7984626	Die assembly for molding of glass element In the initial stage of die-opening operation when an upper core 3 moves upward together with an upper die plate 1, an upper cavity die 2 is biased downwardly by an elastic member 10 so as to press the lower surface of the upper cavity di...	07/26/2011
7788950	Method and a machine for the production of hollow glassware articles A pressing plunger apparatus for forming a parison in a glassware forming machine by a blow-and-blow process or a press-and-blow process. ...	09/07/2010
6948339	Punch assembly for producing hollow glass articles in a mold A punch assembly for producing hollow glass articles in a mold has a punch member, which is moved to and from the mold along a straight axis by an electric motor positioned eccentrically with respect to the straight axis and connected to the punch member by a rotary...	09/27/2005
6823694	Method of manufacturing glass optical elements A method for manufacturing a glass optical element having at least one concave surface, including: softening a glass molding material by heating, molding the softened material with a first mold having a first molding surface and a second mold having a second molding...	11/30/2004
6718799	Die and glass material for forming glass substrate, method for manufacturing glass substrate, and magnetic disk glass substrate A glass material (4) is placed in a forming die including a pair of upper and lower dies (1, 2) and a control member (3) for controlling the space between the upper and the lower die, and then heated, softened, and molded by pressure into a glas...	04/13/2004
6701748	Glassware machine A glassware machine having a glassware mold and a movable plunger positioned adjacent to the glassware mold for pressing a glass gob in the glassware mold to form a glassware article. The glassware machine includes an electric motor operatively connected ...	03/09/2004
6557378	Method for pressing oxynitride glass, disk of oxynitride glass made by said method, and pressing die for said method A method of producing a disk having a radius of r and a thickness of 2h from an oxynitride glass by pressing, said method being characterized in that the pressing load (F), the pressing temperature (T), and the pressing time (t) are defined by the express...	05/06/2003
6546755	Device for pressing two mold portions together and controlling an internal pressure so as to create a hollow cone A method and device for the manufacture of a hollow cone (37) with a cone tip (31) whereby a parison of viscous material (35) is moulded into the shape of the hollow cone. An escape space (11) becomes accessible to the material in the vicinity of a cone t...	04/15/2003
6170296	Mechanism for driving plungers of metal molds in a bottle-making machine A single drive mechanism for simultaneously driving plungers of a plurality of metal molds in each of the sections by employing an output cost-efficient electric motor as a mechanism for driving the plungers. The novel plunger drive mechanism makes it pos...	01/09/2001
6079226	Method of forming a glass parison A hollow glass parison is formed by pressing a gob of molten glass in a mold cavity with a plunger which is moved in a linear direction by a leadscrew which is connected to the plunger and is driven by a servomotor. Actuation of the servomotor creates a r...	06/27/2000
6079228	Forming method of glass element A method of molding a glass element in which a glass material is heated and then press-molded between an upper mold and a lower mold when a temperature of the heated glass material reaches a predetermined temperature. A first cooling of the glass element ...	06/27/2000
5938807	Method for manufacturing press-molded glass object and apparatus therefor In press molding, a shaft (metal mold 13) is moved by positional or torque control to cause upper and lower molds to reach a set position slightly before a position where the upper and lower molds are set in a final mold closed state. As soon as the upper...	08/17/1999
5908483	Apparatus and process for molding of glass A press head drive cylinder control having a force sensing, force signal providing load cell on the drive cylinder of a glass molding press. The glass molding press having a base, a mold table rotatably mounted on the base, a plurality of mold positions o...	06/01/1999
5823011	Apparatus for press molding glass bodies In the press-molding method for producing molded glass bodies, the molding plug remains in contact with the molded glass body in the mold after the molding process until the regions close to the surface have cooled to a temperature at which the molded bod...	10/20/1998
5800590	Plunger assembly Controlled movement of the pneumatically operated plunger in the narrow neck press and blow process of manufacture of glass containers is achieved by use of a pressure regulating valve in the air supply to the plunger which determines the pressure supplie...	09/01/1998
5766294	Method and apparatus for producing an optical element using a molding block and a temperature effecting mechanism contacting the molding block for heat exchange A method and an apparatus for producing an optical element capable of performing a molding temperature control required for a plurality of independent molding blocks in a short period of time, and continuously and simultaneously producing a plurality of d...	06/16/1998
5707414	Servo plunger mechanism A plunger mechanism for forming a hollow article of glass in a "narrow neck press and blow" operation which utilizes an electro servo-driven leadscrew to actuate it. A position sensing resolver is used to determine the position of the plunger over the ful...	01/13/1998
5427599	System for stamping an optical storage disk An optical storage disk consists of a glass substrate (1) into which guide tracks (3) for servo-controlling the focussed light beams are directly stamped by a hot stamp process. After stamping, the glass substrate is thermally quenched in the stamping dev...	06/27/1995
5417730	Apparatus for molding an optical element A press molding apparatus produces an optical element of high precision efficiently in such a way that an upper mold member is at least slidably operated relative to a shell mold, and the force of an operation member to be applied onto the upper mold memb...	05/23/1995
5403370	Glass compression molding apparatus A glass compression molding apparatus includes a horizontal upper platen and a lower platen disposed parallel to the upper platen. A top die is mounted for movement along the upper platen between a plurality of stations, and a bottom die is mounted for mo...	04/04/1995
5324339	Method for monitoring the performance of a glass container forming machine A method of collecting data to indicate certain internal conditions during the function of a glass container forming machine, and apparatus for the practice of the method including sensing devices within a plunger cycling mechanism of the machine for tran...	06/28/1994
4948410	Check valve assembly for glass forming machinery A check valve assembly which is to permit flow into a pneumatic cylinder is accessible without taking the cylinder apart. The check valve is located within an insert which is secured to the cylinder head at an exterior surface. Removal of the inserts make...	08/14/1990
4889549	Plunger operating mechanism for a glass forming machine An individual section of a glass forming machine has a cylinder for controlling the displacement of the plunger. The piston is tandem in nature so that pressure can be selectively reduced for the final portion of plunger advance and the inner diameter of ...	12/26/1989
4867778	Individual section glass forming machine The displacement of one or more of the plungers in an individual section glass forming machine is monitored so that the location of the plungers, when each mold cavity has completely filled (parison formation point), can be determined. When a plunger is l...	09/19/1989
4824460	Manufacture of parisons of molten glass Parisons of molten glass for subsequent moulding are molded in a mould cavity formed from one-piece lower portion (10), a dividable neck ring (14), and a dividable central mould portion (24). A gob of molten glass is introduced into a gov uide (58) so tha...	04/25/1989
4723976	Method and apparatus for pressing glass cathode ray tube faceplates A method and apparatus for pressing glass TV tube faceplates employing a microprocessor controlled ram and plunger operated with open loop position based speed control at relatively high rates of motion when the plunger is not in critical contact with the...	02/09/1988
4613352	Displacement pick-up arrangement for the position detection of a pressing plunger A displacement pick-up arrangement for the position detection of a plunger is a component of a pressing station of a section of an I.S. glass-forming machine in which a plunger is inserted into a mold recess of a parison mold holding a glass gob at this t...	09/23/1986
4288240	Plunger mounting mechanism in a glassware forming machine In glassware forming apparatus a parison is formed at a blank station by pressing a gob of molten glass using a plunger and plunger actuating means mounted on a carriage, the carriage also carrying a neck ring and being reciprocable so that a parison held...	09/08/1981
4274859	Plunger operating mechanism for a glass forming machine In the operation of a pressing plunger for forming a parison from a gob of molten glass, it is important that the plunger be moved into the gob which is retained in the parison mold, with a fairly rapid motion and also be capable of being withdrawn from t...	06/23/1981
4203749	Method of pressing and pressing machine for hollow glassware An improved pressing machine for hollow glassware comprising advancing means for advancing molds through a series of advance steps for molding one range of size of articles and for advancing the molds through advance steps of other distances for molding a...	05/20/1980
3953187	Control system for hydraulic rams A control system for operating the ram vertically movable in and out of a glass mold. The control system for operating the ram includes a hydraulic pump, a hydraulic fluid reservoir, and a hydraulic cylinder which is interconnected to the pump and to the ...	04/27/1976

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Class 65/318 - With means varying plunger pressure during pressing