Base plate for mountng a router in a support table

A base plate apparatus for attachment to a router wherein the router has a router motor for rotation of a bit by the router motor with the router motor being mounted in a router housing with an end plate for attachment to the base plate apparatus, the end plate having a plurality of fastening screw holes at predetermined positions thereon by which the end plate can be fastened by screws at right angles to the end plate and engaging into the screw holes;

• the base plate apparatus comprising:
• a plate member shaped and arranged to define an upper surface of the plate member with the upper surface arranged for contact with a workpiece;
• the plate member being arranged for attachment of the under side of the plate member to the end plate of the router housing;
• the plate member having a bit hole therethrough breaking out at a bit opening in the upper surface such that a router bit attached to the router extends through the bit hole through the plate member for engaging a workpiece in contact with the upper surface of the plate member so that the bit cuts a shape into the workpiece;
• the upper surface of the plate member being arranged such that movement between of the workpiece over the plate member causes sliding movement between the upper surface of the plate member and the workpiece while the upper surface remains in contact with the workpiece;
• a fastening system for fastening the end plate of the router housing to the plate member;
• a suction opening at the upper surface of the plate member;
• a suction hole extending from the suction opening at the upper surface of the plate member to the under side of the plate member opposite to the surface;
• the suction opening being located in the upper surface at a location spaced from the bit opening in the upper surface;
• the suction opening being separated from the bit opening by the upper surface so that air passing from the bit opening to the suction opening must pass over the upper surface and is prevented from passing through the plate below the upper surface;
• the suction opening being located in the upper surface at a location spaced outwardly from the fastening system so as to be outward of the end plate of the router housing;
• the plate member being arranged such that the workpiece can slide while in contact with the upper surface from the bit opening to the suction opening;
• a source of suction underneath the plate member connected to the suction hole in the plate member to draw air and the waste material through the suction opening in the upper surface.

A base plate apparatus for attachment to a router wherein the router has a router motor for rotation of a bit by the router motor with the router motor being mounted in a router housing with an end plate for attachment to the base plate apparatus, the end plate having a plurality of fastening screw holes at predetermined positions thereon by which the end plate can be fastened by screws at right angles to the end plate and engaging into the screw holes;

• the base plate apparatus comprising:
• a plate member shaped and arranged to define an upper surface of the plate member with the upper surface arranged for contact with a workpiece;
• the plate member being arranged for attachment of the under side of the plate member to the end plate of the router housing;
• the plate member having a bit hole therethrough breaking out at a bit opening in the upper surface such that a router bit attached to the router extends through the bit hole through the plate member for engaging a workpiece in contact with the upper surface of the plate member so that the bit cuts a shape into the workpiece;
• the upper surface of the plate member being arranged such that movement between of the workpiece over the plate member causes sliding movement between the upper surface of the plate member and the workpiece while the upper surface remains in contact with the workpiece;
• a fastening system for fastening the end plate of the router housing to the plate member;
• a first suction opening at the upper surface of the plate member;
• a first suction hole extending from the first suction opening at the upper surface of the plate member to the under side of the plate member opposite to the surface;
• the first suction opening being located in the upper surface at a location spaced from the bit opening in the upper surface;
• the first suction opening being separated from the bit opening by the upper surface so that air passing from the bit opening to the first suction opening must pass over the upper surface and is prevented from passing through the plate below the upper surface;
• the first suction opening being located in the upper surface at a location spaced outwardly from the fastening system so as to be outward of the end plate of the router housing;
• a source of suction underneath the plate member connected to the first suction hole in the plate member to draw air and the waste material through the first suction opening in the upper surface;
• a second suction opening at the upper surface of the plate member;
• a second suction hole extending from the second suction opening at the upper surface of the plate member to the under side of the plate member opposite to the surface;
• the second suction opening being located in the upper surface at a location spaced from the bit opening in the upper surface;
• the second suction opening being is separated from the bit opening by the upper surface so that air passing from the bit opening to the second suction opening must pass over the upper surface and is prevented from passing through the plate below the upper surface;
• the second suction opening being located in the upper surface at a location spaced from the first suction opening in the upper surface so that the second suction opening is separated from the first suction opening by a third portion of the upper surface;
• the second suction opening being located in the upper surface at a location spaced outwardly from the fastening system so as to be outward of the end plate of the router housing;
• a source of suction underneath the plate member connected to the second suction hole in the plate member to draw air and the waste material through the second suction opening in the upper surface.