Method of making keyboard assemblies

In the assembly of a plurality of at least generally dome-shaped resilient contact elements in a predetermined pattern to overlie a related pattern of spaced-conductor regions carried upon an insulating substrate, so that said elements may be centrally depressed to bridge spaced conductor portions, the steps of:

• stocking a plurality of said elements in each of a plurality of stacks and in a layout corresponding to said predetermined pattern;
• positioning a layer of flexible insulating material, adhesively coated on its undersurface, over said stacks of said elements with said layer including a plurality of apertures arranged in said predetermined pattern and individually of a diameter smaller than the width of said elements;
• pressing said layer against the uppermost one of said elements in each of said stacks with said apertures in registry with said uppermost ones of said elements;
• removing said layer, with the uppermost ones of said elements thereto adhesively affixed, to a position overlying said regions with the affixed ones of said elements in registry with said related pattern of said regions;
• and pressing said layer toward said regions, while maintaining said registry, to adhesively secure said layer in a position mounted upon said substrate --.

In the assembly of individually-separate dome-shaped resilient contact elements in a predetermined pattern to overlie a similar pattern of spaced-conductor regions carried upon an insulating substrate, so

• that said elements may be centrally depressed to bridge spaced conductor portions, the steps of:
• stocking a plurality of said elements in each of a plurality of wells disposed in a plate in a pattern corresponding to said predetermined pattern;
• positioning a layer of flexible insulating material, adhesively coated only on its undersurface, over the stacks of said elements in said plate;
• pressing said layer against the uppermost one of said elements in each of said stacks;
• downwardly depressing all of said uppermost ones of said elements;
• removing said layer, with said uppermost ones of said elements thereto adhesively affixed, to a position overlying said substrate with said uppermost ones of said elements in registry with said corresponding pattern of regions;
• and pressing said layer against said substrate, while maintaining said registry, to adhesively secure said layer in a position mounted upon said substrate.

In the assembly of a plurality of individually-separate at least generally dome-shaped resilient contact elements in a predetermined pattern to overlie a related pattern of spaced-conductor regions carried upon an insulating substrate, so that said elements may be centrally depressed to bridge spaced conductor patterns, the steps of:

• stocking a plurality of said elements in each of a plurality of stacks and in a layout corresponding to said predetermined pattern;
• positioning a layer of flexible insulating material, adhesively coated only on its undersurface, over said stacks of said elements;
• pressing said layer against the uppermost one of said elements in each of said stacks;
• removing said layer, with the uppermost ones of said elements thereto adhesively affixed, to a position overlying said regions with the affixed ones of said elements in registry with said related pattern of said regions;
• and pressing said layer toward said regions, while maintaining said registry, to adhesively secure said layer in a position mounted upon said substrate.