Metal working – Method of mechanical manufacture – Electrical device making
Patent
1976-03-15
1976-11-23
DiPalma, Victor A.
Metal working
Method of mechanical manufacture
Electrical device making
29203B, 29407, 312234, 340282, 350 30, 356166, H05K 330
Patent
active
039927725
ABSTRACT:
A device and method for simplifying the placement of electronic components in printed circuit boards are provided, the apparatus including an illuminated work area for illuminating openings in a mask transported across the work area. A load roller and a take-up roller, along with associated guide rollers, are arranged on opposite ends of the work area. The continuous, programmed mask is arranged in individual frames. The mask is carried across the work area by the rollers, which are driven by suitable drive means. Each frame of the mask has a number of light passing openings or markings made in it, the openings, in turn, permitting the illumination of corresponding openings in at least one printed circuit board (PCB) mounted over the mask, the PCB requiring component part insertion. The mask also has position indications on it which are read to position the mask for each frame. Preferably, timing indications also are made on each frame which enables the device to advance both the mask and an associated parts supply means to the succeeding frame after termination of an idealized elapsed time period for the component placement required by the preceding frame. The parts supply means is coordinated for movement with each frame of the mask so that any part required for assembly in a particular frame of the mask is provided simultaneously with that frame. The supply means includes a pair of stacked support tables driven sequentially in conjunction with mask frame advance. Sequentially numbered part trays are inserted in correspondingly numbered sections of the support tables, which numbers also correspond to a particular frame of the mask. Individual part bins are presented to the device operator for each frame of the printed circuit board construction sequence presented on the mask. A method of printed circuit board construction includes provisions for arranging parts in storable trays as a complete job package, inserting the trays in a device sequentially, the sequence corresponding to a predetermined construction pattern, and presenting both the pattern and parts to an operator simultaneously to facilitate PCB construction.
REFERENCES:
patent: 2959848 (1960-11-01), Savitt
patent: 3548493 (1970-12-01), Hubbard
patent: 3621554 (1971-11-01), Feldman et al.
patent: 3667104 (1972-06-01), Chamillard
patent: 3710477 (1973-01-01), Frawley
patent: 3831250 (1974-08-01), Holiday
patent: 3852865 (1974-12-01), Ragard
Krick Willard E. W.
Scannell Robert M.
Windish Edward R.
DiPalma Victor A.
Lucchesi Lionel L.
McDonnell Douglas Corporation
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