US3765973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding together two thermoplastic workpieces by high frequency vibratory energy
Assignee: Branson Ultrasonics Corp
•
Filing: 1972-03-03
•
Granted: 1973-10-16
•
Expires: 1992-03-03
Abstract
Abstract For welding together by vibratory energy (sonic or ultrasonic frequency) two workpiece portions which are in abutting contact, an energy concentrating element is disposed between the juxtaposed surfaces to be welded. The energy concentrating element promotes the build-up of dissipated energy to quickly provide molten material which flows and upon solidification produces a fused joint.
Inventors
- 👤 G Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:31
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C37/00; B29C37/0078; B29C37/0082; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/302; B29C66/3024; B29C66/303; B29C66/3034; B29C66/30341; B29C66/40; B29C66/41; B29C66/43; B29C66/45; B29C66/50; B29C66/51; B29C66/54; B29C66/70; B29C66/72; B29C66/721; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C65/34; B29C66/20; B29C66/22; B29C66/223; B29C66/24; B29C66/244; B29C66/71; B29C66/82; B29C66/824; B29C66/8242; B29K; B29K2025/00; B29K2055/00; B29K2055/02; B29K2079/00; B29K2079/08; B29K2105/00; B29K2105/06; B29K2105/20; B29K2105/206; B29K2305/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
The method of welding together a thermoplastic workpiece along two juxtaposed surfaces by high frequency vibratory energy comprising the steps of: disposing a metal wire energy concentrating element between the two juxtaposed surfaces of the thermoplastic workpiece to be welded together; applying a compressive force between said juxtaposed surfaces for urging said surfaces into abutting contact with one another; contacting one exposed side of said workpiece with a horn vibrating at a frequency in the range from 1 to 100 kHz whereby such vibrations are conducted by said workpiece toward said surfaces in contact with said element, said vibrations causing the build-up of frictional heat and a softening and flowing of thermoplastic material of the workpiece surface portions in contact with said element; terminating the vibrations and temporarily retaining the compressive force whereby to cause the softened material to rigidify and provide a welded bond between said workpiece surfaces, and withdrawing the metal wire element from the welded bond between said workpiece surfaces.
Claim 2
Independent Claim
163 words
The method of welding together a thermoplastic workpiece along two juxtaposed surfaces by high frequency vibratory energy comprising the steps of: disposing a metal wire energy concentrating element between the two juxtaposed surfaces of the thermoplastic workpiece to be welded together; applying a compressive force between said juxtaposed surfaces for urging said surfaces into abutting contact with one another; contacting one exposed side of said workpiece with a horn vibrating at a frequency in the range from 1 to 100 kHz whereby such vibrations are conducted by said workpiece toward said surfaces in contact with said element, said vibrations causing the build-up of frictional heat and a softening and flowing of thermoplastic material of the workpiece surface portions in contact with said element; terminating the vibrations and temporarily retaining the compressive force whereby to cause the softened material to rigidify and provide a welded bond between said workpiece surfaces, and withdrawing the metal wire element from the welded bond between said workpiece surfaces.
Claim 3
Dependent Claim
20 words
The method of welding together a thermoplastic workpiece as set forth in claim 1, said juxtaposed surfaces being plane surfaces.
Claim 4
Dependent Claim
26 words
The method of welding together a thermoplastic workpiece as set forth in claim 1, said concentrating element having an end which protrudes from said juxtaposed surfaces.
Claim 5
Dependent Claim
28 words
The method of welding together a thermoplastic workpiece as set forth in claim 1, and filling the space in said bond resulting from the withdrawal of said element.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |