Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1975-07-31
1976-09-28
Tupman, W.
Metal working
Method of mechanical manufacture
Assembling or joining
29589, 228180A, 357 70, B01J 1700
Patent
active
039823172
ABSTRACT:
A method is described for continuously assembling transistors to a lead frame, capable of high speed production by automatic machinery. A carrier ribbon bearing transistor chips is fed to a work station to which a lead frame is also fed at about right angles thereto. The carrier ribbon end portion bearing one transistor is welded to a terminal of the lead frame and cut to separate it from the remainder of the ribbon. Lead frame strips bearing at least 10 transistors are separated from the remainder of the lead frame and placed in a multi-cavity mold for individually encapsulating the transistors.
REFERENCES:
patent: 3235937 (1966-02-01), Lanzl
patent: 3244040 (1966-04-01), Schmitz
patent: 3413713 (1968-12-01), Helda
patent: 3439235 (1969-04-01), Lanzl
patent: 3484536 (1969-12-01), Saeschke
patent: 3566458 (1971-03-01), O'Cone
patent: 3698074 (1972-10-01), Helda
Sprague Electric Company
Tupman W.
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