Method of and apparatus for aligning printed circuit carriers pr

Geometrical instruments – Gauge – Collocating

Patent

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Details

33614, 33623, 33644, 33568, 269903, 101DIG36, B23Q 300, B25B 1100

Patent

active

048053163

ABSTRACT:
A printed circuit carrier which is deposited on a mobile table and has two spaced-apart holes is aligned with reference to the printing unit by two locating members one of which is fixed to the table and the other of which is movable relative to the table toward and away from the one locating member. The locating members are expandible and contractible and are introduced into the holes of a carrier on the table in contracted condition to be thereupon caused or permitted to expand and to thereby center the carrier on the table. If the distance x between the axes of the holes in the carrier on the table exceeds or is less than an optimum distance x', the table, the locating members and the carrier on the table are shifted in the longitudinal direction of a line connecting the axes of the holes in a direction counter to the direction of movement of the other locating member relative to the one locating member through half the difference between x and x'. The difference between the distances x and x' is monitored by a suitable gauge which transmits signals to a microprocessor serving to control a reversible motor which shifts the table and the carrier relative to the printing unit when the distance x deviates from the distance x'.

REFERENCES:
patent: 3098431 (1963-07-01), Weaver
patent: 3196549 (1965-07-01), Alexander
patent: 3381554 (1968-05-01), Ploch et al.
patent: 3769714 (1973-11-01), Anderson
patent: 3950095 (1976-04-01), Bouygues et al.
patent: 4244109 (1981-01-01), Silverman
patent: 4291867 (1981-09-01), Williams et al.
patent: 4540084 (1985-09-01), Curti
patent: 4638985 (1987-01-01), Maeda et al.
patent: 4700488 (1987-10-01), Curti
Pokorny et al, Substrate Position Indicator, Western Electric Technical Digest No. 31, pp. 45-46, Jul. 1973.

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