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US3784079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic bond control apparatus
Assignee: Motorola Solutions Inc
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Filing: 1972-04-03
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Granted: 1974-01-08
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Expires: 1992-04-03
Abstract
Abstract A method and apparatus for improving the quality of the bond obtained from an ultrasonic welding apparatus. The formation of the bond is detected by monitoring the voltage applied to the ultrasonic transducer and by detecting a drop in the applied voltage indicative of bond formation. The bonding apparatus is turned off immediately following bond formation to prevent further ultrasonic energy from weakening the bond.
Inventors
- 👤 K Spanjer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/071; H10W72/075; H10W72/0711; H10W72/07141; H10W72/07531; H10W72/07532; H10W72/07533; H10W72/50; H10W72/531; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
In an acoustic bonding apparatus utilizing an electrically driven ultrasonic transducer and a bonding head energized by said transducer, a system for detecting the formation of a bond, comprising, means coupled to said transducer for monitoring the power supplied to said transducer and for detecting a relatively sharp change therein, said relatively sharp change being indicative of the formation of said bond, and switch means connected to said monitoring means and responsive thereto for deenergizing said head following said relatively sharp change.
Claim 2
Dependent Claim
82 words
In an acoustic bonding apparatus utilizing an electrically driven ultrasonic transducer and a bonding head energized by said transducer, a system for detecting the formation of a bond, comprising, means coupled to said transducer for monitoring the power supplied to said transducer and for detecting a relatively sharp change therein, said relatively sharp change being indicative of the formation of said bond, and switch means connected to said monitoring means and responsive thereto for deenergizing said head following said relatively sharp change.
Claim 3
Dependent Claim
88 words
In an acoustic bonding apparatus utilizing an ultrasonic transducer having an electrical connection thereto, and a bonding head energized by said transducer, a system for detecting the formation of a bond, including in combination, means coupled to said transducer for monitoring the voltage appearing at said electrical connection and for detecting a drop in the amplitude thereof, said drop being indicative of the formation of said bond, and switch means connected to said sensing means and responsive thereto for de-energizing said head following said drop in said voltage.
Claim 4
Dependent Claim
88 words
In an acoustic bonding apparatus utilizing an ultrasonic transducer having an electrical connection thereto, and a bonding head energized by said transducer, a system for detecting the formation of a bond, including in combination, means coupled to said transducer for monitoring the voltage appearing at said electrical connection and for detecting a drop in the amplitude thereof, said drop being indicative of the formation of said bond, and switch means connected to said sensing means and responsive thereto for de-energizing said head following said drop in said voltage.
Claim 5
Dependent Claim
59 words
A system as recited in claim 2 further including acoustic energy transfer means coupled to said transducer and to said bonding head for coUpling acoustic energy to said bonding head and for transferring a change in acoustic impedance to said transducer, said impedance change resulting from an impedance change occurring at said bonding head upon formation of said bond.
Claim 6
Dependent Claim
24 words
A system as recited in claim 3 wherein said energy transfer means includes a horn having means for reducing reflections of acoustic waves therein.
Claim 7
Dependent Claim
25 words
A system as recited in claim 3 wherein said energy transfer means includes a horn having discretely different cross sectional areas along a longitudinal axis.
Claim 8
Dependent Claim
31 words
A system as recited in claim 5 wherein said horn comprises a plurality of cylindrical structures having different radii coaxially coupled to each other to form a horn having discrete steps.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |