Mass pin alignment tool

Details Mass pin alignment tool Mass pin alignment tool

1991-07-11

1992-06-23

Larson, Lowell A.

Wireworking

Wire straightening

B21F 102

Patent

active

051234572

ABSTRACT:
A simple, manual tool for re-aligning lead pins on a pin grid array (PGA) integrated circuit (IC) chip or the like. The tool has a series of removable, parallel bending plates mounted between a top and a base. The bending plates fit between the lead pins to be re-aligned. Re-alignment is accomplished by displacing the top relative to the base (which is stationary), which causes the bending plates to swivel from the base and impinge upon the lead pins at the upper ends of the bending plates. Permanent re-alignment is achieved by bending the lead pins past their elastic limit to a desired point. The top remains parallel to the base at all times. Maximum displacement of the bending plates is limited by an outer skirt when it contacts the base. Four springs bias the tool toward the neutral position. After the lead pins are re-aligned in one direction, the PGA is removed, rotated 90 degrees, and the re-inserted, whereupon the re-alignment routine is performed again to complete the re-alignment process. An adapter plate mounted on the top of the tool accepts PGAs of different sizes.

REFERENCES:
patent: 3687172 (1972-08-01), Suverkropp
patent: 4371013 (1983-02-01), Camp
patent: 4397341 (1983-08-01), Kent
patent: 4481984 (1984-11-01), Linker
patent: 4544003 (1985-10-01), Bumann et al.
patent: 4643234 (1987-02-01), Alemanni
patent: 4789011 (1988-12-01), Moloney
patent: 4824632 (1989-04-01), Meuschke et al.
patent: 4895189 (1990-01-01), Alemanni
patent: 4944086 (1990-07-01), Nishihara et al.
"Precision Pin Straightening Comb," by J. M. Cioffi, Jr. et al., IBM Technical Disclosure Bulletin, vol. 22, No. 3, Aug. 1972, p. 1102.

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