Emhart Industries, Inc.

International Partners in Glass Research

Robert J Douglas

Robert L Doughty

Albert J Trahan

Robert P Andersen

John P Mungovan

Robert J Duga

Vaughan Abbott

David Braithwaite

Constantine W Kulig

Richard A Walker

Stanley P Jones

Paul F Scott

Kenneth L Bratton

John E Suomala

Wasyl Bystrianyk

James P Poole

Harold Rawson

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 the cylinder guides plunger advancement at all pressures.

Plunger operating mechanism for a glass forming machine

An assembly for preventing a flanged finish on the neck portion of a glass container by permitting continuous engagement between the neck ring and the guide ring even though the guide ring is subject to wear and by forcefully maintaining this continuous engagement with a spring urged centering sleeve which extends through a bore in the neck ring to engage the bottom of the guide ring. The neck ring includes a stepped interior annular groove into which a guide ring having an outer stepped annular portion is received. While the total height of the guide ring corresponds to the total height of the groove of the neck ring, the upper surface (70) of the bottom step (72) of the guide ring establishes a selected clearance (Z) with the upper surface (74) of the bottom portion (66) of the neck ring groove so that the continuous engagement can be maintained as the top surface of the guide ring wears.

Neck ring/plunger assembly for a glassware forming machine

An article of glassware, particularly a glass container, of increased strength is made by a process in which the parison is treated in a manner which will cause the glass in the outer surface layer of the formed glassware article to be in a state of compression. Preferably a glaze having a coefficient of thermal expansion lower than the coefficient of thermal expansion of the glass of the parison is applied to the outer surface of the parison. Advantageously, the glaze is applied to the parison by a flame spray method or by dipping the parison into a fluidized bed containing powdered glaze. As an alternative, the glaze applied to the outer surface of the parison may be capable of being at least partially crystallized, after the glassware article has been formed from the parison, to produce an outer surface of the glassware article having a lower coefficient of thermal expansion than the base glass of the glassware article. Alternatively to the application of a glaze, glass in the outer surface of the parison may be chemically changed so that the surface glass in the parison has a higher transformation temperature than the remainder of the glass in the parison. Additionally, the interior surface of the parison may be treated by a material producing active gases so that a compressive layer is produced on the internal surface of the final glassware article, at least partially balancing the compressive layer in the outer surface of the glassware article.

Manufacture of glassware articles of improved strength

The casing for a cylinder in an I.S. glassware forming machine is displaced with the kick-up basket and strikes the neck ring assembly in the event there is any misalignment therebetween. The plunger holder and a float cover move laterally as one due to float clearances defined between the float cover and the top cap of the spring retainer, and between the plunger holder and the adapter assembly, and between the cooling tube, which is connected to the plunger, and the bore of the locking bolt which secures the adapter assembly to the piston.

Plunger assembly for a glassware forming machine

A gob distributor for directing glass gobs to glassware-forming sections. Most particularly, this relates to the automatic positioning of scoops receiving the glass gobs from the glassmaking apparatus and directing them into troughs of glassware-forming sections which are arranged in a bank. The gob distributor features an arrangement wherein the distributor may be converted to vary the number of scoops in a scoop group from one to three or more. Principal features of the gob distributor are the utilization of a servomotor which is a reversible DC motor for positioning a rack which controls the angle of the scoops, and a releasable ball screw drive.

Universal servo-driven gob distributor

A gob distributor for directing glass gobs to glassware-forming sections. Most particularly, this relates to the automatic positioning of scoops receiving the glass gobs from the glassmaking apparatus and directing them into troughs of glassware-forming sections which are arranged in a bank. The gob distributor features an arrangement wherein the distributor may be converted to vary the number of scoops in a scoop group from one to three or more. A principal feature of the gob distributor is the utilization of a servomotor which is a reversible DC motor for positioning a rack which controls the angle of the scoops.

One or more jigs or frameworks are provided at a location remote from the glass feeder so several different plunger assemblies can be made up for ready installation in the feeder. Each jig is made up with the help of an alignment tool having characteristics peculiar to that feeder and to the orientation of the plungers relative to the feeder. The extensive downtime now required to repair or replace the refractory plungers in the feeder can be minimized by following the method detailed herein for use of the alignment tool and subsequent fabrication and assembly of the jig or framework in which the plungers are assembled away from the feeder.

Method and apparatus for aligning a plunger assembly in a glass feeder

An actuator for use in or with a glassware forming machine for pneumatically driving a member through a predetermined path, such member being, in one embodiment, a pusher cylinder for moving one or more glassware articles through a predetermined arcuate path. The velocity of the actuator is controlled according to a predetermined velocity profile and is effected by an electromechanical control means which controls the linear velocity of the piston of a pneumatic cylinder in one direction of motion.

Electro-pneumatic actuator for glassware forming machine

A glass feeder plunger operating mechanism driven by an electric motor controlled by a programmable computer programmed to drive the motor in a predetermined manner in order to generate a predetermined motion profile of one or more glass feeder plungers. The plungers are secured to the end of a cantilevered lateral support bracket which is cyclically and vertically reciprocated by cyclical oscillations of the electric motor. The output shaft of the motor is connected to a ball screw in threaded engagement with a ball nut which is secured to a member connected to the plunger support bracket. The plunger support bracket is attached to a moveable vertical support shaft which maintains plunger alignment during the range of motion. The operating mechanism is attached to a frame which is adjustable in two dimensions to facilitate alignment of the plungers with their respective orifices. Air cylinders are provided to counter-balance the weight of the members being vertically reciprocated. Overload means is provided to limit plunger damage in the event excessive operating forces are encountered. Various sensor switches and adjusting means are disclosed to facilitate plunger alignment and control.

Electronic glass feeder plunger operating mechanism

A takeout tong head includes a support bracket having an upper portion adapted to be attached to a takeout arm and a lower portion having at least one cylinder housing. A cylinder and tong assembly is associated with each cylinder housing and includes a mounting flange removably attached to the cylinder housing, a cylinder extending into said cylinder housing, a piston member in said cylinder, a scissors tong assembly extending downwardly from said flange, a piston rod extending from the piston to the scissors tong assembly, and a spring contained between said flange and said piston member.

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North Granby, CT, United States of America

Robert J Douglas