Back to results
US 5,846,377 AGranted
Method for processing workpieces by ultrasonic energy
AssigneeBranson Ultrasonics Corporation
InventorsJeffrey L. Frantz, David A. Grewell
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBranson Ultrasonics Corporation
InventorsJeffrey L. Frantz, David A. Grewell
Estimating the term…
A method of welding two thermoplastic workpieces (W) together along a predetermined weld line during a weld cycle utilizing a high frequency vibration sonic or ultrasonic welding apparatus. This welding apparatus includes an electroacoustic transducer (18) which transmits such vibrations to a horn (19) which is dimensioned to be resonant with the horn being brought into forced engagement with at least one of the workpieces to be welded. The method comprising the steps of bringing the workpieces into bearing relation against one another along the weld line. Then the electroacoustic transducer is energized so as to resonate the horn with a desired motional amplitude. Forceful contact is established between the horn and one of the workpieces. Then, the forceful contact between the horn and the one workpiece is maintained throughout the weld cycle. The motional amplitude of the horn is varied in accordance with a desired motional amplitude profile.
An ultrasonic apparatus including a power supply for providing electrical energy in the ultrasonic frequency range to an electroacoustic transducer provided with a horn whose frontal surface is adapted to be coupled to a workpiece for transmitting, when in forced contact with the workpiece and rendered resonant, power in the form of mechanical vibrations in ultrasonic frequency range to the workpiece, the improvement comprising:
An ultrasonic apparatus including a power supply for providing electrical energy in the ultrasonic frequency range to an electroacoustic transducer provided with a horn whose frontal surface is adapted to be coupled to a workpiece for transmitting, when in forced contact with the workpiece and rendered resonant, power in the form of mechanical vibrations in the ultrasonic frequency range to the workpiece, the improvement comprising:
An ultrasonic apparatus including a power supply for providing electrical energy in the ultrasonic frequency range to an electroacoustic transducer provided with a horn whose frontal surface is adapted to be coupled to a workpiece for transmitting, when in forced contact with the workpiece and rendered resonant for a certain time interval, power in the form of mechanical vibrations in the ultrasonic frequency range to the workpiece, the improvement comprising:
An ultrasonic apparatus including a power supply for providing electrical energy in the ultrasonic frequency range to an electroacoustic transducer provided with a horn whose frontal surface is adapted to be coupled to a workpiece for transmitting, when in forced contact with the workpiece and rendered resonant, power in the form of mechanical vibrations in the ultrasonic frequency range to the workplace for a time interval.
Dependencies are inferred from the claim text.