Patent US4171761A successfully refreshed from Google Patents.
US4171761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave solder apparatus
Assignee: Nokia of America Corp
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Filing: 1978-03-20
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Granted: 1979-10-23
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Expires: 1998-03-20
Abstract
Abstract Apparatus is disclosed herein for extending the length of a trailing wave of a double sided laminar wave of solder by the use of a dam in an oil intermix wave soldering system to create a dead zone while still being able to remove oil from the surface of the dead zone area on a continuous basis to prevent contaminants from interfering with soldering operations.
Inventors
- 👤 Robert L. Boldt
- 👤 George R. Wood, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:34
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/06; B23K3/0646; B23K3/0653; B23K2101/00; B23K2101/36; B23K2101/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
In wave soldering apparatus of the type which supplies a mixture of solder and oil in the form of a bidirectional wave having solder flowing in the opposite directions defined as advance and trailing areas wherein devices to be soldered enter the solder in the advance area and exit the solder near the trailing area of the solder wave, the inventive addition of: weir means restricting the normal flow of solder in the trailing area of the solder wave for creating a dead zone on the surface thereof, wherein said weir means includes a multiplicity of spillway means for drawing contaminants, in a venturi type action, off the surface of the solder as the solder flows over said spillway means of said weir means.
Claim 2
Dependent Claim
124 words
In wave soldering apparatus of the type which supplies a mixture of solder and oil in the form of a bidirectional wave having solder flowing in the opposite directions defined as advance and trailing areas wherein devices to be soldered enter the solder in the advance area and exit the solder near the trailing area of the solder wave, the inventive addition of: weir means restricting the normal flow of solder in the trailing area of the solder wave for creating a dead zone on the surface thereof, wherein said weir means includes a multiplicity of spillway means for drawing contaminants, in a venturi type action, off the surface of the solder as the solder flows over said spillway means of said weir means.
Claim 3
Dependent Claim
103 words
Wave soldering apparatus comprising, in combination: solder supply means for providing advance and trailing wave flows of solder wherein objects enter said advance wave to receive a scrubbing action by the solder and leave in the area of said trailing wave; and solder flow restriction means for creating a dead zone in said trailing wave to improve the "peel back" of soldered objects leaving the solder, said restriction means including a weir means having a spillway means for drawing contaminants, in a venturi type action, off the surface of the solder as the solder flows over said spillway means of said weir means.
Claim 4
Dependent Claim
103 words
Wave soldering apparatus comprising, in combination: solder supply means for providing advance and trailing wave flows of solder wherein objects enter said advance wave to receive a scrubbing action by the solder and leave in the area of said trailing wave; and solder flow restriction means for creating a dead zone in said trailing wave to improve the "peel back" of soldered objects leaving the solder, said restriction means including a weir means having a spillway means for drawing contaminants, in a venturi type action, off the surface of the solder as the solder flows over said spillway means of said weir means.
Claim 5
Dependent Claim
42 words
Apparatus as claimed in claim 2 comprising, in addition: means for transporting devices to be soldered by said soldering apparatus, the devices entering the solder in the advance wave area and leaving the solder in the dead zone of said trailing wave.
Claim 6
Dependent Claim
111 words
Wave soldering apparatus of the type including solder wave extender means for supplying solder to form advance and trailing solder waves, baffle means for extending the length of the trailing wave to create a dead zone, means for returning solder flowing from the solder waves to a solder pot and means for passing printed circuit boards to be soldered into the solder in the area of said advance wave and removing the printed circuit boards from the solder in the area of the trailing wave comprising the inventive addition of: means incorporated in said baffle means for drawing contaminants, in a venturi type action, off the surface of said trailing wave.
Claim 7
Dependent Claim
111 words
Wave soldering apparatus of the type including solder wave extender means for supplying solder to form advance and trailing solder waves, baffle means for extending the length of the trailing wave to create a dead zone, means for returning solder flowing from the solder waves to a solder pot and means for passing printed circuit boards to be soldered into the solder in the area of said advance wave and removing the printed circuit boards from the solder in the area of the trailing wave comprising the inventive addition of: means incorporated in said baffle means for drawing contaminants, in a venturi type action, off the surface of said trailing wave.
Claim 8
Dependent Claim
37 words
Apparatus as claimed in claim 4 wherein said baffle means includes means for removing contaminants from the surface of said trailing wave and returning same to the solder pot below the surface of solder in the pot.
Claim 9
Dependent Claim
68 words
Wave soldering apparatus comprising, in combination: solder supply means for providing advance and trailing wave flows of solder; and trailing wave restriction means for creating a dead zone in said trailing wave, said restriction means including a weir means having spillway means for drawing contaminants off the surface of the solder, in a venturi type action, as the solder flows over said spillway means of said weir means.
Claim 10
Dependent Claim
68 words
Wave soldering apparatus comprising, in combination: solder supply means for providing advance and trailing wave flows of solder; and trailing wave restriction means for creating a dead zone in said trailing wave, said restriction means including a weir means having spillway means for drawing contaminants off the surface of the solder, in a venturi type action, as the solder flows over said spillway means of said weir means.
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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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |