Abstract In a process for producing calculator printed circuit boards, a pallet consisting of a plurality of printed circuit boards are interconnected by snapaway perforated edges at the adjacent side of the boards, so that the pallet consisting of plural boards is processible as a whole. Electrical elements or components have their terminals received through openings in the printed circuit board, which insertion is by machine utilizing a pantographic locating principle. Components are also assembled on the board by hand insertion. After inserting selected electrical components at the desired locations, and masking other locations, the electrical connections are then treated by fountain soldering to form electrical connections between the leads and the printed circuit. The soldering occurs to the pallet as a whole. The individual boards are then snapped apart and the board has enough dimensional stability so that it is rigidly clamped on a fixture and passed over a routing blade at a predetermined slight clearance therefrom so that all of the excess lead sections are trimmed from the subsurface of the printed circuit substrate. Further electrical devices can then be added and soldered in place and the printing circuit board together with its electrical components can then be positioned within a container for a computer application. The described process incorporates minimal handling and incorporates high speed machine assembly techniques wherein multiple operations occur simultaneously or repetitively at high speed.
In a process for producing circuit boards for calculators and the like, the steps of supplying a pallet consisting of a plurality of identical circuit board sections which are interconnected through adjacent perforated adjoining edges, such perforations being sufficiently close together to allow breakage of the pallet sections apart, inserting electrical elements at selected locations in respective ones of said printed circuit board sections while such sections are joined together and with terminal portions of said elements extending through openings in said circuit board and projecting from the underside of the respective circuit board sections, shielding some of said electrical elements with a snap-a-way section of said printed circuit board sections, passing the pallet including the printed circuit board sections over a soldering fountain, separating the respective circuit boards from each other by snapping them apart at their perforated adjoining edges, and thereafter passing individual circuit board sections across a cutting element which is located a fixed predetermined clearance from the undersurface of the circuit board sections to effect trimming of the extended nonfunctional terminals which are soldered at the subsurface of the printed circuit board section.
Claim 2
Dependent Claim
187 words
In a process for producing circuit boards for calculators and the like, the steps of supplying a pallet consisting of a plurality of identical circuit board sections which are interconnected through adjacent perforated adjoining edges, such perforations being sufficiently close together to allow breakage of the pallet sections apart, inserting electrical elements at selected locations in respective ones of said printed circuit board sections while such sections are joined together and with terminal portions of said elements extending through openings in said circuit board and projecting from the underside of the respective circuit board sections, shielding some of said electrical elements with a snap-a-way section of said printed circuit board sections, passing the pallet including the printed circuit board sections over a soldering fountain, separating the respective circuit boards from each other by snapping them apart at their perforated adjoining edges, and thereafter passing individual circuit board sections across a cutting element which is located a fixed predetermined clearance from the undersurface of the circuit board sections to effect trimming of the extended nonfunctional terminals which are soldered at the subsurface of the printed circuit board section.
Claim 3
Dependent Claim
37 words
The process in accordance with claim 1 including the step of snapping out the snap-a-way section of said printed circuit board after soldering during which the electrical circuit elements on the printed circuit board have been shielded.
Claim 4
Dependent Claim
31 words
The process in accordance with claim 1 wherein said electrical elements are machine inserted endwise through the openings of such printed circuit board sections at locations in accordance with pantographic operation.