Cleaning and liquid contact with solids – Apparatus – Automatic controls
Patent
1989-08-30
1992-04-14
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
Automatic controls
134 68, 134 72, 134108, 134127, 134199, 134102, 169 11, B08B 302
Patent
active
051038463
ABSTRACT:
Apparatus for cleaning printed wiring boards and/or printed circuit boards after soldering thereof for removal of rosin soldering fluxes using terpene compounds. The apparatus includes three separate components, a first housing containing the terpene washing apparatus, a second housing containing a water rinsing apparatus, and intermediate conveying means for transporting the devices from the first housing to the second housing. This intermediate conveying means should be disposed at an angle such that the end facing the second housing is disposed lower than the first end. Exhaust fans are provided for the first housing to prevent escape of terpene odors or vapors therefrom, while similar exhaust fans in the second housing prevent the escape of water vapor. Scrubbers are provided in the exhaust ducts from the first housing to prevent terpene compounds from escaping to the atmosphere. A flame detector prevents the introduction of boards having flames thereon or being overheated. A series of temperature controls prevent the terpene vapor temperature from rising above a predetermined value to prevent the vapors from igniting.
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Surface Mount '88--Royal Plaza Trade Center, Marlborough, Mass., Aug. 29-Sep. 1, 1988--Schedule.
Attalla, Gary, "Equipment Considerations When Cleaning with Terpene Compounds", Surface Mount '88 Conference, pp. 499-504.
GRAM EC-1850 product literature.
"Gram Corporation Announces the Newest Member", News Release, Jul. 15, 1988.
Letter dated May 25, 1988 to Circuits Manufacturing from Vitronics Corporation; and a News Release dated May 24, 1988.
Vitronics/GRAM 1821 Aqueous Cleaners product literature.
Letter dated May 27, 1988 to Gary Attalla of Vitronics Corporation from Craig Hood of Petroferm.
Attalla, Gary, "Evaluating Terpene/Surfactant Mixtures in In-Line Spray Equipment", NEPCON WEST--Feb. or Mar. 1989, pp. 532-535.
Hayes, Michael E., Ph.D., "High Performance Cleaning with Non-Halogenated Solvents", NEPCON WEST, Feb. or Mar. 1989, pp. 536-547.
Hayes, Michael E., Ph.D., "High Performance Cleaning with Terpene/Surfactant Mixtures", Surface Mount Conference, Aug. 1988.
Treiber Series 400 Aqueous Cleaners advertising brochure.
Letter dated Aug. 9, 1988 from Gary Attalla to AT&T Bell Laboratories and an attached quotation for an EC-1850 Cleaner bearing the same date.
Order dated Aug. 31, 1988 from AT&T Bell Laboratories for shipment of an EC-1850 Cleaner.
Attalla Gary J.
Clark Gerald F.
Stinson Frankie L.
Vitronics Corporation
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