Nordson Corporation

Jeffrey S Noss

James W Schmitkons

Martin J Harjar

Jan L Shanaberger

Joseph G Schroeder

William R Rehman

Richard P Price

Harry J Lader

Rolf T Spongh

A non-contact electrostatic liquid dispensing system and method for dispensing continuous, high viscosity viscoelastic nonconductive liquid strands in a controlled manner onto a substrate. An applicator or gun having a charging electrode introduces an electrostatic charge to the high viscosity viscoelastic nonconductive liquid and as charged continuous fibrous strand of high viscosity viscoelastic nonconductive material. One or more electric fields are generated about the discharge path to impart a variety of movements or patterns to the charged continuous fibrous strand of high viscosity viscoelastic nonconductive liquid.

Liquid dispensing system and method for electrostatically deflecting a

Apparatus for dispensing a mixture of two components comprises a dispenser device formed with a first passageway connected to a source of a Component A material, and a second passageway connected to a source of a Component B material, both of which are connected to a static mixer where the components are combined to form a mixture. The dispenser includes structure for purging the mixture of Component A and B from areas of the dispenser which come into contact therewith, and a check valve operative to create a suction within the dispenser and static mixer to prevent leakage of the mixture from the static mixer when flow of the components is interrupted.

Two-component dispensing system

A method and apparatus for mixing and dispensing two different polymeric materials which react chemically with one another when combined by supplying each material to a common dispenser where the materials are mixed and dispensed, which method and apparatus is operative to maintain substantially steady state flow pressures of the materials at the inlets to the dispenser when flow is terminated such that upon restarting of the flow, the steady state volumetric ratio of materials is immediately reestablished and maintained. The method and apparatus includes two metering pumps for individually supplying the liquid materials to the dispenser and means for varying the speeds of the pumps in response to changes in temperature of the materials so as to maintain a fixed mass ratio of the materials to the dispenser.

Method & apparatus for metering flow of a two-component dispensing system

A two-component mixing and dispensing system for mixing and dispensing two-component polymeric materials which react chemically with one another when combined to form a mixture includes a controller for adjusting the pressure at which at least one of the components is supplied to a dispenser dependent upon variations in the parameters which affect the cure time of the mixture.

Method and apparatus for compensating for changes in viscosity in a

In an apparatus and method for measuring the strength of an adhesive bond, a dispenser applies adhesive to a substrate for a prescribed period of time, a conveyor moves the substrate to a compressing station within a preselected open time, after which time a compressor compresses the substrate against another substrate to form an adhesive bond therebetween, the bond being formed under a substantially constant compression force and for a preselected compression time. During the latter portion of the compression time, the bonded substrates are moved together at a substantially constant rate of speed through a transition distance, one of the substrates contacting a stop plate at the end of the compression time to prevent further movement while the other of the substrates continues at the substantially costant rate of speed to break the bond. A load cell measures the maximum pull force required to break the bond and also provides a real time analog signal for the pull force of the bond during tension, thereby to obtain an indication of the total energy expended in breaking the bond.

Method and apparatus for bond testing

A controller for a manipulator or robot having a plurality of power-driven, signal-controlled links interconnected to permit relative motion therebetween to define plural degrees of freedom. The links of the manipulator are controlled to perform movements corresponding to stored sequences of command positions. The controller stores, for each link, a sequence of command positions and is operable to add a further command position or a further sequence of command positions to the original sequence of command positions. In a non-synchronous mode of operation (where the movements of the robot are not sychronized with movement of the workpiece) or in a synchronous mode, a further command position is added to the end of the original sequence by producing a number of additional command positions and storing the additional command positions after the original sequence. The last of the additional command positions is substantially equal to the further command position. The position change per command of the additional commands is maintained generally constant. In like manner, in the nonsynchronous mode, the initial position of a further sequence of command positions can be added to the end of an original sequence. In a synchronous mode of operation a first and a second sequence of command positions can be connected. To do this, a portion of each original command sequence is replaced by a substitute sequence of command positions, preserving the correlation between the command position processing rate and the conveyor rate.

Transitional command position modification for a controller

A method and apparatus for real time editing, or modifying, of a program of prerecorded robot motions stored in a robot controlled memory while it is being processed by the controller for subsequent storage of the program, as edited, in memory and output to the robot for execution.

Method and apparatus for modification of a prerecorded programmed

A multi-axis robot wrist assembly having three hydraulically operated rotary actuators which are mechanically connected in series such that the output of each actuator drivingly positions the body of the succeeding actuator located outboard thereof. The hydraulic connection to any wrist actuator, except the innermost actuator, includes a series-connection of (a) internal passage(s) through actuator(s) which are located inboard of the actuator in question and (b) external line(s) between the actuator in question and actuator(s) located inboard thereof. By connecting all but the innermost wrist actuator through hydraulic paths which are at least partially internal to actuators positioned inwardly thereof, the overall envelop of the wrist assembly is reduced. Also included for the purpose of minimizing the wrist envelop is an electrical cable arrangement for connecting the electrical outputs of position transducers associated with each wrist actuator to an electrical plug or other suitable connection located on the robot arm which mounts the wrist assembly. The electrical cable, includes semicircular folded sections between each pair of adjacent actuators and partially encircling the rotatable output member interconnecting them, to permit adjacent actuators to rotate with respect to each other without damaging the electrical cable spanning them, which remains neatly folded between the actuators. The mechanical interconnection between the rotary output member of one actuator and the body of the succeeding actuator is detachable, facilitating actuator replacement in the field without replacing the entire wrist assembly.

Streamlined multi-axis robot wrist assembly with partially enclosed

A calibration fixture is disclosed for calibrating the link position transducer output signals of a teaching robot and a work robot such that when the links thereof occupy the same identical spatial position and orientation, the magnitudes of the corresponding link position transducer outputs of the work and teaching robots will be the same.

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Bay Village, OH, United States of America

Jeffrey S Noss