US3717539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic welding apparatus
Assignee: Raytheon Co
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Filing: 1969-08-28
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Granted: 1973-02-20
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Expires: 1989-08-28
Abstract
Abstract An ultrasonic welding apparatus and method appropriate for welding sheets of plastic including oriented polyesters such as polyethylene terephthalate film, including means for chilling the workpieces while they are being compressed by the ultrasonic tool.
Inventors
- 👤 H Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:27
CPC Classifications
B; B32; B32B; B32B37/00; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C66/00; B29C66/01; B29C66/03; B29C66/034; B29C66/0342; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/349; B29C66/3494; B29C66/40; B29C66/41; B29C66/43; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C66/73; B29C66/737; B29C66/7371; B29C66/73711; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/818; B29C66/8181; B29C66/81811; B29C66/81812; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91411; B29C66/91441; B29C66/91443; B29C66/9161; B29C66/91641; B29C66/91643; B29C66/91645; B29C66/919; B29C66/9192; B29C66/91951; B32B27/00; B32B27/06; B32B27/08; B29C35/00; B29C35/16; B29C2035/1658; B29C2035/1675; B29C66/83; B29C66/832; B29C66/8322; B29K; B29K2067/00; B29K2075/00; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2031/00; B29L2031/764; B29L2031/7644; B32B2310/00; B32B2310/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
In an ultrasonic welding apparatus for welding together two or more sheets of molecularly oriented plastic material having a signal generator whose output is converted into periodic and substantially linear excursions of a tool tip, the excursions of the tool tip being utilized to compress the overlapping workpieces such that the heat is added thereto, the improvement comprising: a heat conductive element in contact with the overlapping workpieces positioned between the tool tip and the overlapping workpieces for heat removal therefrom, cooling means for cooling the heat conductive element at the conclusion of an excursion of the tool tip against the workpiece while the workpieces are under compression by the tool tip, and timing means for controlling said cooling means in a timed relationship with the application of welding energy to the tool tip by said signal generator to cool the weld after removal of the welding energy.
Claim 2
Dependent Claim
148 words
In an ultrasonic welding apparatus for welding together two or more sheets of molecularly oriented plastic material having a signal generator whose output is converted into periodic and substantially linear excursions of a tool tip, the excursions of the tool tip being utilized to compress the overlapping workpieces such that the heat is added thereto, the improvement comprising: a heat conductive element in contact with the overlapping workpieces positioned between the tool tip and the overlapping workpieces for heat removal therefrom, cooling means for cooling the heat conductive element at the conclusion of an excursion of the tool tip against the workpiece while the workpieces are under compression by the tool tip, and timing means for controlling said cooling means in a timed relationship with the application of welding energy to the tool tip by said signal generator to cool the weld after removal of the welding energy.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |