US4844320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system and method for vibration welding
Assignee: SABIC Global Technologies BV
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Filing: 1988-11-01
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Granted: 1989-07-04
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Expires: 2008-11-01
Abstract
Abstract A displacement transducer is used to continuously monitor the distance between two fixtures securing parts to be welded. The signal from the displacement transducer is used to stop the welding process when a desired amount of material has been extruded from the weld. The control strategy will automatically take into account part nonuniformities that normally result in poor welds in welding processes that use time as the control variable.
Inventors
- 👤 Vijay K. Stokes
- 👤 Louis P. Inzinna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:11
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/06; B29C66/00; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/90; B29C66/92; B29C66/929; B29C66/9292; B29C66/97; B29C66/974; G; G05; G05D; G05D19/00; G05D19/02; B29C66/924; B29C66/9241; B29C66/94; B29C66/944; B29C66/949; B29C66/95; B29C66/951; B29C66/9512; B29C66/9513; B29C66/9516; B29C66/9517; B29C66/959; B29C66/9592
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
A method for non-ultrasonic vibration welding thermoplastic parts to obtain uniform quality welds, comprising the steps of: holding the parts to be welded together under pressure with the surfaces to be welded in contact with one another; vibrating one part relative to the other in the plane of the surfaces to be welded causing the surfaces in contact with one another to melt; continuously monitoring the weld penetration; and stopping the vibration of one part relative to the other when a predetermined weld penetration has been reached.
Claim 2
Independent Claim
87 words
A method for non-ultrasonic vibration welding thermoplastic parts to obtain uniform quality welds, comprising the steps of: holding the parts to be welded together under pressure with the surfaces to be welded in contact with one another; vibrating one part relative to the other in the plane of the surfaces to be welded causing the surfaces in contact with one another to melt; continuously monitoring the weld penetration; and stopping the vibration of one part relative to the other when a predetermined weld penetration has been reached.
Claim 3
Dependent Claim
84 words
A non-ultrasonic vibration welding machine for welding two parts together with uniform quality welds comprising: means for applying pressure along the interface of the parts to be welded; means for reciprocally moving the parts to be welded along their common interface in an intermittent linear motion relative to one another; means for continuously monitoring weld penetration during the vibration welding process; and means for stopping the movement of the parts being welded along their common interface when a predetermined weld penetration has been achieved.
Claim 4
Dependent Claim
84 words
A non-ultrasonic vibration welding machine for welding two parts together with uniform quality welds comprising: means for applying pressure along the interface of the parts to be welded; means for reciprocally moving the parts to be welded along their common interface in an intermittent linear motion relative to one another; means for continuously monitoring weld penetration during the vibration welding process; and means for stopping the movement of the parts being welded along their common interface when a predetermined weld penetration has been achieved.
References Cited (Backward Citations)
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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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |