Ultrasonic welding horn with sonics dampening insert
First Claim
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1. An ultrasonic welding horn comprising:
- a rigid body having a welding edge, the body including means for connecting the body to a source of ultrasonic vibration, the body having a mode of vibration in response to the source and a recess in the welding edge, the body having a nodal point which has less vibration than other portions of the body when the body is vibrating due to the source;
an insert received within at least portions of the recess; and
a coupling means, coupling the insert to the body at the nodal point to dampen the insert from ultrasonic vibrations.
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Abstract
An ultrasonic welding horn is provided that has an insert connected to the body of the horn proximal to the welding edge, the insert being dampened from the ultrasonic operating frequency by attaching it to the horn body at a nodal point that has little or no vibration during the operational vibrational mode of the horn. During a welding operation, the insert is positioned to secure living cell tissue that is between two plastic layers, preventing undesirable vibration of the cell tissue. The welding edge, which extends around the periphery of the insert, contacts the plastic layers around the cell tissue, welding a seal between the layers.
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Citations
23 Claims
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1. An ultrasonic welding horn comprising:
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a rigid body having a welding edge, the body including means for connecting the body to a source of ultrasonic vibration, the body having a mode of vibration in response to the source and a recess in the welding edge, the body having a nodal point which has less vibration than other portions of the body when the body is vibrating due to the source; an insert received within at least portions of the recess; and a coupling means, coupling the insert to the body at the nodal point to dampen the insert from ultrasonic vibrations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of sealing an object between plastic layers comprising the steps of:
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placing the object between the plastic layers; activating an ultrasonic welding horn having a welding edge to vibrate at an ultrasonic frequency, the welding horn further having an insert that is dampened from ultrasonic vibration, the insert being positioned in a recess; and pressing the welding horn against the plastic layers such that the welding edge contacts the plastic layers and welds the layers together around the object. - View Dependent Claims (10, 11, 12)
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13. A method of sealing cells between plastic layers comprising the steps of:
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placing the cells between the plastic layers; activating an ultrasonic welding horn having a welding edge to vibrate at an ultrasonic frequency, the welding horn having an insert that is dampened from ultrasonic vibration, the insert being positioned in a recess of the welding edge; pressing the welding horn against the plastic layers the welding edge contacting the plastic layers and welding the layers together around the living cell tissue. - View Dependent Claims (14, 15)
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16. An ultrasonic welding system comprising:
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a source of ultrasonic energy; a rigid body having a welding edge, the body including means for connecting the body to a source of ultrasonic vibration, the body having a mode of vibration in response to the source and a recess in the welding edge, the body having a nodal point which has less vibration than the rest of the body when the body is vibrating due to the source; an insert received within the recess; and a coupling means, coupling the insert to the body at the nodal point so that the insert is held proximal to the welding edge within the recess to dampen the insert from ultrasonic vibration. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification