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with a #0 biscuit, set up to make a right angle joint. ]] A biscuit joiner or sometimes '''plate joiner''' is a Woodworking tool used to join two pieces of wood together. A biscuit joiner uses a small 100mm (4") diameter tungsten carbide tipped Circular Saw Blade to cut a crescent shaped hole (called the mouth) in the opposite edges of two pieces of wood or Wood Composite Panels . An oval shaped compressed wooden biscuit is covered with glue, or glue is applied in the slot. The biscuit is immediately placed in the slot, and the two boards are clamped together. The wet glue expands the biscuit, further improving a bond that is generally stronger than the wood itself. HISTORY The biscuit joining system is a recent development, having been invented in 1956 in Liestal Switzerland by Hermann Steiner . Steiner opened his carpenters shop in 1944 and in the middle of the 50’s, whilst looking for a simple means of joining the recently introduced chipboard, invented almost by accident the now world-famous Lamello Joining System. In the succeeding years there followed further developments such as the circular saw and the first stationary biscuit (plate) joining machine in 1956 followed by the first portable biscuit joiner for Lamello grooves in 1968. In 1969 the family operation was incorporated by the name of Lamello AG. PRODUCTION Biscuits are predominantly used in joining sheet goods such as Plywood , Particle Board and Medium-density Fibreboard . They are sometimes used with solid wood, replacing Mortise And Tenon joints as they are easier to make and almost as strong. They are also used to align pieces of wood when joined edge-to-edge in making wider panels. USAGE Both of the faces of the machine have reference marks on the center line of the blade for easy alignment to setting out marks on the material being joined. The body of the machine with the blade is spring loaded and in the normal position the blade is retracted. The operator aligns the machine and uses a firm pressure to push the body forward against the base plate to make the cut. The waste material is blown out of the slot on the right of the base plate. Because the slots are longer than the biscuits, it is still possible to slide the panels sideways after the joint is assembled.(Before the glue sets). This fact makes the biscuit joiner easy to use, because it does not require extreme accuracy or jigs to achieve perfect joints. The depth of the cut can be altered by an adjustable stop, the smaller base can be rotated through 90 deg. and accessories are provided for altering the offset of the base to the blade. THE 3 SIZES OF STANDARD BISCUITS Note: The mm sizes are exact and taken direct from the Lamello website. No source is provided for inch sizes which do not appear equivalent. EXTERNAL LINKS REFERENCE
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