Electric heating – Metal heating – For bonding with pressure
Patent
1984-07-25
1986-08-26
Albritton, Clarence L.
Electric heating
Metal heating
For bonding with pressure
219 861, 156504, B23K 1110
Patent
active
046084797
ABSTRACT:
A splicer-welder (13) for multiple reels (11,12) of continuous tapes of multiple connected integrated circuit lead-frames to be conveyed through a lead-frame preparation line (10) includes fixed electrodes (40) positioned adjacent an entry slot (45) and spring-loaded movable electrodes (59) normally spaced from the fixed electrodes. The end of the lead-frame tape is sensed and by use of an accumulator section of multiple pulleys (18,19,20) one of which is movable on a rail (21), the span of tape between pulleys acts as a reserve of tape for continuous downstream processing of the tape while the end of the tape is stopped. Sprocket holes on the tape ends are placed on retaining pins (41,42) alongside the electrodes and one or more frames of a beginning of a second lead-frame tape from a second reel are overlapped with one or more frames of the end of the first tape. The electrodes are moved into welding position abuttive opposite sides of the overlapped ends of the tapes and the tapes spliced to each other at multiple weld spots. A translatable pin guard (43 ) permits free sliding passage of tape through the space between the electrodes in normal nonwelding operation and is retracted when splicing-welding is to be performed exposing the pins for receiving the ends of the tapes.
REFERENCES:
patent: 2196600 (1940-04-01), Wean et al.
patent: 2474593 (1949-06-01), Putnam
patent: 3684623 (1972-08-01), Koehler et al.
patent: 4490199 (1984-12-01), Dunning
Albritton Clarence L.
National Semiconductor Corporation
Sigda C. M.
Winters Paul J.
Woodward Gail W.
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