Geometrical instruments – Gauge – Collocating
Patent
1986-02-12
1987-10-20
Stearns, Richard R.
Geometrical instruments
Gauge
Collocating
33614, 269 21, 269 484, 269 50, 269903, B23Q 300, B25B 1100
Patent
active
047004886
ABSTRACT:
A substrate to be imprinted with a printed circuit has a pair of locating holes. The substrate is aligned and fixed relative to the drum of a screen printing machine via a pair of aligning and fixing devices each of which has a locating pin receivable in a locating hole. Each of the locating pins is axially divided into two parts which are urged into engagement with one another via a set of springs but can be spread apart against the action of the springs. When the two parts of a pin are in contact with each other, the width or diameter of the pin is substantially smaller than the diameter of the respective locating hole. On the other hand, the width or diameter of each pin in the spread condition equals the diameter of the associated locating hole. The substrate is placed on the aligning and fixing devices while the two parts of each pin engage one another so that the pins can be readily received in the locating holes. Once the pins are in the holes, the pins are spread to thereby align and fix the substrate in the printing machine.
REFERENCES:
patent: 2099364 (1937-11-01), Hunter
patent: 3381554 (1968-05-01), Ploch et al.
patent: 3460822 (1969-08-01), Link
patent: 3574946 (1971-04-01), Mayston et al.
patent: 3798782 (1974-03-01), Lindahl
patent: 4017793 (1977-04-01), Haines
patent: 4244109 (1981-01-01), Silverman
Kontler Peter K.
Stearns Richard R.
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