The invention is a unique modification of biscuit joinery. The instant invention creates “two way” slots in joining wood [preferred embodiment] pieces, allowing a “shelf joint” in the center of a face of wood, to be fastened with a common nickel (or similar coin or disc). Rather than using a limited biscuit cutter/biscuit joiner, the instant method discloses use of a router with a specialized router bit (aka slot cutter bit); the slot cutter on the router [when the bit is machined in the following way infra, and then configured and used in the following way infra] allows a common 5¢ piece to become the spline joining the two wood pieces or panels, thereby allowing rapid assembly & disassembly of wood furniture. The precise ratios and proportions of grooves, slots, coin wells, overhangs, pushtool ‘raceways,’ and offsets therefor, make this invention possible. Specifically, by featuring a “raceway overhang” of height-thickness at least 10% that of the “female” piece of joining wood, the herein-disclosed disc-biscuit joiner method and apparatus holds.
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