Wireworking – Wire straightening
Patent
1975-09-15
1977-01-11
Lanham, C.W.
Wireworking
Wire straightening
72DIG10, 140149, B21F 102, B21F 700
Patent
active
040021912
ABSTRACT:
The invention relates to a method and an apparatus for straightening the pins of semi-conductor devices such as transistors and the like. The apparatus includes means for holding the head of a semi-conductor device, means for preventing the pins thereof from separating from one another beyond a cylindrical volume defined by the outer diameter of the ring formed by the pins where they join the head and a plurality of pistons in one to one relation with the plurality of pins generally perpendicular to the pins, each piston aiming towards a central axis defined by the pins. Means are provided for inserting the pistons one between each of adjacent of the pins and towards the axis. A round plunger coaxial with said axis is provided, said round plunger having a diameter generally equal to the inner diameter defined by the pins. Means are provided for advancing the plunger axially towards the head between the pins. Means are further provided for propelling the pistons and the plunger to adjacent the head, rotating a respective one relative to a respective other of the head and the pistons generally a predetermined angle about the axis and rerotating said respective one relative to said respective other of said head and said pistons back generally said predetermined angle.
REFERENCES:
patent: 2609858 (1952-09-01), Engel
patent: 2861620 (1958-11-01), Paulson
patent: 3013590 (1961-12-01), Pechy
patent: 3349813 (1967-10-01), Pastuszak
patent: 3352331 (1967-11-01), Swyt
patent: 3700011 (1972-10-01), Walter
Combs E. M.
Lanham C.W.
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