Jig for curved moldings

Abstract

A jig adapted for use with a conventional molder-planer for cutting work on curved wood sections. For this purpose, the present invention includes a base with the jig mounted thereon. The base bolts onto the table of the molder-planer so that the jig is positioned directly under the molder-planer cutter head. The jig is comprised of a set of two guide wheels permanently mounted in a side-by-side relationship on one side of the plate, and two adjustably mounted pneumatic cylinders, each with a guide wheel bolted to the end of the piston rod, mounted opposite to the permanent guide wheels.

I claim: 
     
       1. A jig for guiding a wood piece of any curvature in a path for engagement with a cutting tool having a cutter head, vertical support rods and a table, comprising: a base for attachment to said cutting tool table whereby said jig is positioned directly under said cutting tool cutter head;   a guide wheel assembly comprised of a set of two guide wheels permanently mounted in a side-by-side relationship on one side of the base; and   an adjustable guide assembly comprised of two removably mounted pneumatic cylinders mounted opposite to the permanent guide wheels on said base, each said cylinder driving a piston arm with a horizontally positioned guide wheel bolted to the piston arm's distal end.   
     
     
       2. A jig according to claim 1, wherein: said base is a flat, horizontal, generally rectangular plate having a top face, under face, front, back, left side, and right side, and whose longitudinal axis of from front to back.   
     
     
       3. A jig according to claim 2, wherein: said base undersurface has two clamping strips attached thereto, one each along the jig base front and the jig base back for attachment to said cutting tool table.   
     
     
       4. A jig according to claim 3, wherein: said guide wheel assembly guide wheels are horizontally positioned against and permanently fixed to the plate top face, and lie in the same longitudinal axis parallel to the plate left side.   
     
     
       5. A jig according to claim 4, wherein: said adjustable guide assembly pneumatic cylinders lie in side-by-side relationship each having a longitudinal axis transverse to the longitudinal axis of the base plate.   
     
     
       6. A jig according to claim 5, wherein: each cylinder drives said piston arms in a horizontal direction toward the guide wheel assembly thereby holding the wood piece to be cut firmly between the two sets of guide wheels.   
     
     
       7. A jig according to claim 6, wherein: two semicircular indentations are formed on the left plate side at approximately the one-third and two-third distance points from front to back, the radii of the indentations being slightly greater than the radius of the cutting tool vertical support rods, wherein said jig base is positioned on the cutting tool table so that the jig base indentations fit snugly against the support rods.   
     
     
       8. A jig according to claim 7, wherein: said guide wheel assembly wheels have a one inch diameter, are positioned two inches apart, and are located near to the plate left side between the two indentations.   
     
     
       9. A jig according to claim 8, wherein: each clamping strip has two swiveling clamps positioned near to the base left and right sides, therein said clamps swivel under the molder-table table edges applying upward pressure and thereby holding the jig base firmly to the molder-planer table. .Iadd.   
     
     
       10.  A jig for guiding a wood piece of any curvature in a path for engagment with a cutting tool having a cutter head, vertical support rods, and a table, comprising: (a) a base for attachment to the cutting tool table wherein the jig is positioned under the cutting tool cutter head;   (b) a first guide mounted on one side of the base;   (c) a second guide mounted on the base opposite the first guide;   (d) means for adjusting the distance between the first guide and the second guide for accommodating curved wood pieces of different widths; and   (e) means for urging the second guide toward the first guide so that the curved wood piece to be cut is firmly held between the two guides while it is guided under the cutter head. .Iaddend. .Iadd.   
     
     
       11.  The jig of claim 10, wherein the base is a flat, horizontal, generally rectangular plate having a top face, under face, left side, right side, front, and back, and a longitudinal axis from front to back. .Iaddend. .Iadd.12. The jig of claim 11, wherein two semicircular indentations are formed on the side of the base at approximately the one-third and two-third distance points from front to back, the radii of the indentations being slightly greater than the radii of the cutting tool vertical support rods, wherein the jig base is positioned on the cutting tool table so that the jig base indentations fit snugly against the 
     
     
        support rods. .Iaddend. .Iadd.13.  The jig of claim 10, further comprising means for ataching the base to the cutting tool table. .Iaddend. .Iadd.14. The jig of claim 13, wherein the attaching means include two clamping strips attached to the base undersurface, one each along the jig base front and the jig base back for attachment to the cutting tool table. .Iaddend. .Iadd.15. The jig of claim 10, wherein each of the first and second guides comprises at least one guide wheel. .Iaddend. .Iadd.16. The jig of claim 15, wherein one of the first and second guides comprises two guide wheels mounted side-by-side. .Iaddend. .Iadd.17. The jig of claim 16, wherein the guide wheels lie along an axis generally parallel to the path for engagement with the cutting tool. .Iaddend. .Iadd.18. The jig of claim 17, wherein the guide wheels are substantially one inch in diameter, are positioned approximately two inches apart, and are located near to the 
     
     
        base left side between the two indentations. .Iaddend. .Iadd.19.  The jig of claim 15, wherein the second guide further comprises at least one piston arm attached to the urging means into which the guide wheel is 
     
     
        attached. .Iaddend. .Iadd.20.  The jig of claim 19, further comprising a second piston arm positioned beside the first piston arm. .Iaddend. .Iadd.21. The jig of claim 20, wherein the piston arms each have a longitudinal axis transverse to the longitudinal axis of the base. .Iaddend. .Iadd.22. A jig for guiding a wood piece of any curvature in a path for engagement with a cutting tool having a cutter head, vertical support rods, and a table, comprising: (a) a base for attachment to the cutting tool table wherein the jig is positioned directly under the cutting tool cutter head;   (b) a first guide mounted on one side of the base, comprising at least one guide wheel in a side-side-by-side relationship with another guide wheel;   (c) a second guide mounted on the base, comprising: (i) at least one piston arm oriented in a side-by-side relationship with another piston arm, wherein the piston arms are spaced opposite the guide wheels of the first guide;   (ii) a horizontally positioned guide wheel attached to the distal end of each piston arm;     (d) means for adjusting the distance between the first guide and the second guide for accommodating curved wood pieces of different widths; and   (e) means for urging the piston arms of the second guide in a horizontal direction toward the guide wheels of the first guide so that the curved wood piece to be cut is firmly held between the two guides. .Iaddend.