US3710759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiper means for liquid flux applying apparatus
Assignee: ELECTROVERT Manufacturing CO Ltd
•
Filing: 1970-11-12
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Granted: 1973-01-16
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Expires: 1990-11-12
Abstract
Abstract A flux coater is arranged to apply liquid flux to the undersurfaces of substantially flat workpieces moved thereover along a path of workpiece travel. A brush is mounted on the coater to extend across the path of travel downstream of the point of flux application, and is mounted for pivotal movement between an active position, in which it contacts the flux coated surfaces of the workpieces to wipe excess flux therefrom, and an inactive position in which it extends downwardly into the flux in the coater. The mounting means for the brush provide for ready and easy adjustment of the effective height of the brush, and furthermore limit movement of the brush to each of the inactive and inactive positions.
Inventors
- 👤 L Tardoskegyi
- 👤 D Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:48
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/08; B23K3/082
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
234 words
In the pretinning and solder coating of substantially flat workpieces, such as printed circuit boards, in which workpiece surfaces initially have a flux coating applied thereto followed by removal of volatile constituents of the flux coating therefrom and application of a solder coating thereto: flux applying apparatus comprising, in combination, a container for liquid flux arranged for movement of substantially flat workpieces thereover along a path of workpiece travel; liquid flux applying means operatively associated with said container and operable to apply a coating of liquid flux therefrom to the undersurface of workpieces moved along such travel path over said container; mounting means positioned on a wall of said container downstream, relative to such path of travel, in spaced relation to said flux supplying means; a solder wiping brush mounted in said mounting means to extend across such path of travel; and means supporting said brush for pivotal movement between an active position and an inactive position; the bristles of said brush, in the active position of said brush, contacting the flux coated undersurfaces of workpieces to distribute the flux over the workpiece surfaces, to wipe excess flux therefrom and to remove any flux bubble; said bristles, in the inactive position of said brush, extending into liquid flux in said container; whereby said wiping brush controls the thickness of the layer of flux on the workpiece surfaces and redirects excess flux into said container.
Claim 2
Dependent Claim
234 words
In the pretinning and solder coating of substantially flat workpieces, such as printed circuit boards, in which workpiece surfaces initially have a flux coating applied thereto followed by removal of volatile constituents of the flux coating therefrom and application of a solder coating thereto: flux applying apparatus comprising, in combination, a container for liquid flux arranged for movement of substantially flat workpieces thereover along a path of workpiece travel; liquid flux applying means operatively associated with said container and operable to apply a coating of liquid flux therefrom to the undersurface of workpieces moved along such travel path over said container; mounting means positioned on a wall of said container downstream, relative to such path of travel, in spaced relation to said flux supplying means; a solder wiping brush mounted in said mounting means to extend across such path of travel; and means supporting said brush for pivotal movement between an active position and an inactive position; the bristles of said brush, in the active position of said brush, contacting the flux coated undersurfaces of workpieces to distribute the flux over the workpiece surfaces, to wipe excess flux therefrom and to remove any flux bubble; said bristles, in the inactive position of said brush, extending into liquid flux in said container; whereby said wiping brush controls the thickness of the layer of flux on the workpiece surfaces and redirects excess flux into said container.
Claim 3
Dependent Claim
88 words
Flux applying apparatus, as claimed in claim 1, in which said container includes an upright wall extending transversely of the path of workpiece travel downstream of said flux applying means; said mounting means comprising a support secured to said upright wall adjacent its upper edge; a pair of laterally spaced brackets mounted on said support; and a pivot shaft supported in said brackets to extend transversely of the path of workpiece travel, said brush being mounted on said pivot shaft for pivoting between its active and inactive positions.
Claim 4
Dependent Claim
100 words
Flux applying apparatus, as claimed in claim 2, in which said brackets are angle brackets each having one leg secured to an upwardly extending flange of said support; the other leg of each bracket having substantially the shape of a right triangle whose hypotenuse edge slopes upwardly and in the direction of travel of the workpieces; said hypotenuse edge of each bracket being formed with a plurality of slots spaced longitudinally therealong and extending substantially perpendicular to the associated hypotenuse edge, said slots opening outwardly to interchangeably receive said pivot shaft for adjustment of the operating height of said brush.
Claim 5
Dependent Claim
54 words
Flux applying apparatus, as claimed in claim 3, in which said one leg of each bracket is formed with a respective vertically extending slot receiving releaseable fastening means extending through respective apertures in the upright flange of said support; said vertically elongated slots providing for fine adjustment of the operating height of said brush.
Claim 6
Dependent Claim
66 words
Flux applying apparatus, as claimed in claim 3, including a stop rod extending transversely of the path of workpiece travel and interchangeably engageable in said slots; said stop rod being positioned in that pair of said slots next adjacent, in an upward direction, the pair of slots receiving said pivot shaft; said stop rod serving to limit pivotal movement of said brush to its active position.
Claim 7
Dependent Claim
26 words
Flux applying apparatus, as claimed in claim 5, including stop means on said stop rod engageable with said brush in the active position of said brush.
Claim 8
Dependent Claim
31 words
Flux applying apparatus, as claimed in claim 6, including cam means on said pivot shaft engageable with said stop means to limit pivotal movement of said brush to its inactive position.
References Cited (Backward Citations)
US254494A
Cited
US459295A
Cited
US691700A
Cited
US2817312A
Cited
US3027867A
Cited
US3135630A
Cited
US3407984A
Cited
US3439854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |