Patent Publication Number: US-11020808-B2

Title: Woodworking machinery jig and fixture system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional of U.S. patent application Ser. No. 15/863,725 filed Jan. 5, 2018, now U.S. Pat. No. 10,646,933 issued May 12, 2020, which claims priority from U.S. Provisional Application No. 62/442,761 filed Jan. 5, 2017, the entire contents of which are hereby incorporated by reference as if all fully set forth herein. 
    
    
     STATEMENT CONCERNING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not applicable. 
     FIELD OF THE INVENTION 
     This invention relates to jigs and fixtures for aligning, guiding, and/or holding a workpiece on woodworking machinery during a woodworking operation. 
     BACKGROUND OF THE INVENTION 
     Woodworking machines utilize various means of positioning or securing a workpiece as it is cut, drilled or routed. As standard equipment a pocket hole jig is usually secured to a movable plywood base. The usual approach is to add a piece of plywood (or other wood board) to the bottom of the jig, called an auxiliary table top, to provide a more stable surface to secure and control the workpiece. By adding a board that is the same thickness as the pocket hole jig to the auxiliary table top the workpiece is supported closely adjacent to the drill guide and there is less chance of the workpiece moving or sliding during the drilling operation. By adding an extra board to the side of the pocket hole jig, a stop system such as the one featured in U.S. Pat. No. 5,337,641 can be added to the pocket hole jig set up. The benefit of this technique is that the operator knows that the end of the board being drilled is accurately positioned. The accuracy of processing multiple pieces is improved with a stop system. There is no mechanism for adding the extrusions of the U.S. Pat. No. 5,337,641 to the portable base. 
     Workpieces with identical holes can then be drilled consistently improving the workmanship of a project. KREG Tool offers an optional material support stop that has a base that is the same height as the K3 and K4 jig bottoms so a long workpiece or panel is supported with the bottom of the workpiece parallel to the floor of the jig. This technique of using the material support base eliminates the tedious task of lining up and holding the workpiece in place. In addition, a flippable arm can be fitted to the base with an adjustable bolt for fine tuning the position of the board in relationship to the flip stop. Although the KREG support stop can be used to support the bottom of the workpiece and position the board with the flip stop feature there is a problem with doing both the support and measuring feature at the same time because the base and the flip arm are the same width. The wide part of the flip arm occupies the same space as the workpiece when it is flipped into position. 
     As standard equipment, the KREG jig has three lines on the floor of the base that are aligned with the center of the pocket hole drill guide. Theoretically, the line could be used to line up a stop for making constant multiple pieces but they are small and are often covered by the workpiece. The outside of the hole would be a better reference for positioning the workpiece in relationship to the hole (s) or hole combinations. The KREG flip stops that are currently available are not amenable to use for miter workpieces. Known techniques for aligning the workpiece for the stationary jig and the portable base have typically been different from each other especially since there is no stop system currently manufactured or sold that fits the KREG portable base. 
     SUMMARY OF THE INVENTION 
     This invention provides an improved system for making improvements to and using a pocket hole jig system, such as the KREG pocket hole jig. A woodworking jig and fixture system of the invention decal/indicia is positioned on the floor of the stationary jig and the portable jig base. 
     The invention provides an improved pocket hole jig measuring system with a flip stop for each jig and the portable base to easily measure the distance between the end of the board and the pocket hole(s). In addition, customized hardware for attaching the flip stop to the jig is provided and described. Instructions are provided for the jig owner or user to drill holes in the existing jig to mount the flip stops. The extrusion for the portable base can be screwed to the extrusion hardware using the existing holes thus certain existing portable base need no alteration to use the hardware. 
     In another aspect a color coded hole decal/indicia illustrates the position of the center of the hole, the outside of the pocket hole, and the center of pocket hole combinations. On the floor of the jig under the board is a color-coded hole scale showing the width of hole combinations. A blue line shows the center of the pocket guide holes. A flip stop on the side of jig has an adjustable threaded bolt which is adjusted to touch the end of the workpiece to position the piece for drilling the pocket holes. 
     The foregoing and other objects and advantages of the invention will appear in the detailed description which follows. In the description, reference is made to the accompanying drawings which illustrate a preferred embodiment of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a perspective view of a modified pocket hole jig with flip stop assembly attached to the jig with a bolt, which is located under the drill guide block. A square workpiece board is clamped in the jig and is in contact with an adjustable positioning bolt in the flip stop assembly. 
         FIG. 1B  is an enlarged view of the positioning bolt in contact with the workpiece being drilled. 
         FIG. 2A  is a ¼ inch grid showing the shape of the L-shaped flip stop arm. 
         FIG. 2B  shows how the flip arm rotates through an arc by the use of a hole in the longer leg. 
         FIG. 2C  is an exploded view of the flip arm assembly. 
         FIG. 2D  is an exploded view of the flip arm assembly showing the open notch near the outside corner of the long leg of the L-shape. 
         FIG. 3A  shows the jig with a square board clamped in the jig. On the floor of the jig under the board is a color-coded hole decal/indicia. Two flip stop assemblies are shown located on the side of the jig floor. One stop is resting against the workpiece and the one on the opposite side of the jig is moved out of line with the position of the workpiece. 
         FIG. 3B  is a close up of the stop assembly not in contact with the workpiece. 
         FIG. 3C  is a close up of the stop assembly that is in contact with the workpiece. 
         FIG. 4A  shows the jig with a workpiece support board clamped on a table next to the jig. A V-shaped notch in the flip arm allows the flip arm to rest in alignment with the workpiece and not contact the support board. 
         FIG. 4B  is a perspective view showing the flip arm resting over the support board with a close-up view of the V-notch in the middle of the outside leg of the L-shaped flip arm. 
         FIG. 4C  is an end view of the support board corner fitting into the flip stop arm V-notch. 
         FIG. 5A  is a ground level perspective showing the jig with a flip stop attached on the side of the jig. 
         FIG. 5B  illustrated the floor sides and the interior support ribs of the plastic pocket hole jig. 
         FIG. 5C  shows the flip arm secured to the solid wall of the jig with a nut and a bolt positioned in a hole in the jig. 
         FIG. 5D  is an exploded view of  FIG. 5C . 
         FIG. 6A  shows the securing bolt engaging a coupler nut inside the jig which also is secured to a U-shaped extrusion on the opposite end of the couple nut. A couple nut is also bolted to the opposite leg of the U-shaped extrusion. An interior rib of the jig is locked between the U-extrusion and the coupler nut. 
         FIG. 6B  is a perspective view of the U-extrusion with a cut away view of half of the extrusion side leg showing the bolt threads. 
         FIG. 6C  is an exploded view of the U-extrusion, the couple nut, flip arm and bolt. 
         FIG. 7A  is an exploded view of the inside of the jig with a wider U-shaped extrusion that is the width of the double coupler and U-shaped unit described in  FIGS. 6A, 6B and 6C . The bolt secures the flip arm by engaging a threaded hole in the side wall of the custom designed U-shaped extrusion. The view is expanded but the parts are in line with each other. 
         FIG. 7B  is an exploded view of the inside of the jig with a wider U-shaped extrusion and the flip stop assembly with the parts aligned with each other. 
         FIG. 7C  is an exploded view of  FIG. 7B . 
         FIG. 8A  is a perspective of the custom made U-shaped extrusion illustrating the threaded hole near the side of the side wall. 
         FIG. 8B  illustrates the angle of the outside of the U-shaped extrusion wall to fit the angle of the inside of the jig, such as the injection molded KREG jig. 
         FIG. 8C  is the same perspective as  FIG. 8B  and illustrates small grooves above and below the threaded hole for the option of gluing the extrusion in place inside the jig. 
         FIG. 8D  illustrates a notch in the inside corner of the extrusion which allows the side walls to be angled slightly for a snug fit inside the jig. 
         FIG. 8E  is a close up view of the notch. 
         FIG. 9A  is a perspective of the flip arm secured on the long bolt attached to the side of the jig under the drill guide block. 
         FIG. 9B  is a close up of the flip stop assembly illustrating the nut locking the bolt to the jig and showing the detail of the V-notch in the middle of the flip arm not contacting the support workpiece support board. 
         FIG. 9C  a close-up view of the flip stop is in contact with the tip of a mitered board. 
         FIG. 9D  illustrates the flip arm assembly positioned on a threaded rod away from the jig and the flip stop is in contact with the tip of a mitered board. 
         FIG. 9E  is a detail of the miter point. 
         FIG. 10A  shows the drill guide block sliding into the portable base. 
         FIG. 10B  is an expanded view of the portable base, the decal/indicia and the flip arm. 
         FIG. 10C  is a perspective cut away view of the portable base and the screws that fit through the holes inside the base and thread into the holes on the top of the custom made extrusion. 
         FIG. 10D  is an end view of the portable extrusion showing a T-slot, hole and a U-channel. 
         FIG. 10E  is a sectional view of the extrusion illustrated in  FIG. 10D . 
         FIG. 11A  is a perspective showing the angle of a miter joint resting on the portable jig floor with the tip of the miter contacting the flip stop arm secured to the jig with a long bolt. 
         FIG. 11B  is a close-up view of the  FIG. 11A  illustrating the decal/indicia viewable from the front of the portable base floor. 
         FIG. 11C  illustrates the tip of the miter in contact with the flip arm. 
         FIG. 12A  illustrates a version of the flip assembly with the material support arm secure to the jig with a bolt. 
         FIG. 12B  illustrates a groove in the flip arm to easily remove and reposition the adjustment bolt. 
         FIG. 12C  is an enlarged view of  FIG. 12A . 
         FIG. 12D  illustrates a V-notch made in the middle of the flip arm. 
         FIG. 12E  is a perspective view of the V-notch added to the flip arm. 
         FIG. 13A  illustrates a modified material support arm, such as the KREG material support arm, that was drilled and taped at 90 degrees from the original through hole. It is threaded on to a bolt secured to the jig and secured with a nut. 
         FIG. 13B  is a close-up view of  FIG. 13A . 
         FIG. 13C  illustrated the  FIG. 13A  with a mitered board contacting the flip stop. 
         FIG. 13D  is a close up of  FIG. 13C  showing the miter point against the stop. 
         FIG. 13E  illustrates a workpiece resting on the material support base with the thin metal flip arm of the invention elevated to engage the end of the board to record the desired position of the workpieces. 
         FIG. 14A  is a perspective of the jig with the drill guide block removed to show the decal/indicia, which is a piece of screen-printed thin aluminum sheet stock die cut in a T-shape with the shape of two rectangles connected to each other. 
         FIG. 14B  illustrates the shape of two rectangles connected to each other. 
         FIG. 14C  is a close up view of the decal/indicia fitted between the two elevated ribs on the floor of the jig. 
         FIG. 15A  shows how the body of the drill guide block fits into the portable base. 
         FIG. 15B  is an exploded view of the decal/indicia and the portable base. It shows that the decal/indicia is bent at 90 degrees so that it also covers the front floor of the portable base. 
         FIG. 15C  shows the decal/indicia positioned between the elevated ribs at the bottom of the example injection molded portable base floor. 
         FIG. 15D  is a close-up view of  FIG. 15C . 
         FIG. 15E  is a close up of  FIG. 15C  showing just the dotted lines. 
         FIG. 16A  is a view of the pocket hole jig with the clamp removed for easy viewing of the decal/indicia on the front of the jig. 
         FIG. 16B  is an enlargement of  FIG. 16A  showing the relationship between the three pocket hole guide bushings and the decal/indicia. The wide blue line represent the middle of the drill guide holes. 
         FIG. 17A  is a smaller version of  FIG. 16B  sized so that it can be illustrated on a page with the other sectors of information shown next to each other. 
         FIG. 17B  illustrates the smaller B and C hole combination. 
         FIG. 17C  illustrates the medium size B and A hole combination. 
         FIG. 17D  illustrates the widest C and A hole combination. 
         FIG. 17E  is a smaller version of  FIG. 16B  sized so that it can be illustrated on a page with the other sectors of information shown next to each other. 
         FIG. 17F  illustrates the smaller B and C hole combination. 
         FIG. 17G  illustrates the medium size B and A hole combination. 
         FIG. 17H  illustrates the widest C and A hole combination. 
         FIG. 17I  is a smaller version of  FIG. 16B  sized so that it can be illustrated on a page with the other sectors of information shown next to each other. 
         FIG. 17J  illustrates the smaller B and C hole combination center line. 
         FIG. 17K  illustrates the median size B and A hole combination center line. 
         FIG. 17L  illustrates the widest C and A hole combination center line. 
         FIG. 18A  illustrates the relationship of the pocket hole combinations using the symbols for yellow and silver.  91  is the pocket hole combination of holes ABC.  92  is the pocket hole combination of holes BC.  93  is the pocket hole combination of holes AB. 
         FIG. 18B  is an enlarged version of  FIG. 18A  illustrating the overlap of combinations  92  and  93 . 
         FIG. 18C  illustrates the combination of lines and colored symbols. 
         FIG. 19A  shows the workpiece  14  clamped in the pocket hole jig  10  with the center line of the workpiece  85  aligned the dotted center line  27  of hole combinations  92 . 
         FIG. 19B  is an enlargement of  FIG. 19A . 
         FIG. 19C  shows the workpiece  14  centered on the yellow area of the decal/indicia  53  for the hole combination of holes B and C  92 . 
         FIG. 19  D is an enlargement of  FIG. 19  B. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1A  a woodworking machinery jig and fixture system is disclosed incorporating a pocket hole jig  10  and a side mounted flip stop arm  16  and a decal/indicia  24  mounted on the floor  26  of the jig  10 . The flip arm assembly  16  is secured to side  30  of the pocket hole jig  10 . The workpiece  14  is positioned against the stop bolt  33  for consistent measuring of the multiple work pieces. As illustrated in  FIG. 1B  the bolt  33  is held in place by a flip arm  32  which is bolted to the side  30  of the jig  10  with another bolt  34 . A workpiece board  14  is positioned on the jig  10  for drilling in the jig  10  and is in contact with an adjustable positioning bolt  34  in the flip stop assembly  16 . 
     Referring to  FIG. 2A  and  FIG. 2B  the flip stop  32  is L-shaped with a hole  40  on the end of the long leg with a slot  44  on the opposite end with a V-notch  42  in the middle.  FIG. 2C  is an exploded view of the flip arm assembly  16  showing the adjustable bolt  33 , the adjustable position nut  46 , the L-shaped flip arm  32  and the tightening thumb nut  36 .  FIG. 2D  shows a rotated view of  FIG. 2C  showing the adjustment bolt  33  fitting into the notch  44  in the flip stop arm  32 . 
       FIGS. 3A, 3B and 3C  illustrate the jig  10  with a flip stop assembly  16  on both sides. The nearer one is in the active position  80  and the flip stop assembly  16  on the opposite side of the jig  10  is in the standby position  82  in which it is not touching the work piece  14 . 
       FIG. 4A  shows the jig  10  with a support board  48  for supporting a work piece or panel. It shows the flip arm  32  mounted to the side of the jig  10  with the arm positioned over the support board  48 . A V-shaped notch  42  in the flip arm  32  allows the flip arm  32  to rest in alignment with the workpiece and not contact the support board.  FIG. 4C  is an end section view of the support board  48  corner fitting into the flip stop arm V-notch  42 . 
       FIG. 5A  is a ground level perspective showing the pocket hole jig  10  with a flip stop assembly  16  attached on the side of the jig  10 .  FIG. 5B  illustrates the floor sides and the interior support ribs  52  of the plastic pocket hole jig  10 .  FIG. 5C  shows the flip arm  32  secured to the solid wall of the jig with a nut  46  and a bolt  34  positioned in a hole in the jig wall  52 .  FIG. 5D  is an exploded view of  FIG. 5C . 
       FIGS. 6A, 6B and 6C  show the securing bolt  34  engaging a coupler nut  54  inside the jig  10  which also is secured to a U-shaped extrusion  56  on the opposite end of the coupler nut  54 . A coupler nut  54  is also bolted to the opposite leg of the U-shaped extrusion  56 . An interior rib  52  of the jig  10  is locked between the U-shaped extrusion  56  and the coupler nut  54 .  FIG. 6B  is a perspective view of the U-shaped extrusion  56  with a cut away view of half of the extrusion side leg showing the bolt threads. 
       FIG. 7A  is an exploded view of the inside of the jig with a wider U-shaped extrusion  58  that is the width of the double coupler and U-shaped unit described in  FIGS. 6A, 6B and 6C . The bolt  34  secures the flip arm  32  by engaging a threaded hole  60  in the side wall of the custom designed U-shaped extrusion  58 . The view is expanded but the parts are in line with each other.  FIG. 7B  is an isometric view of the inside of the jig with a wider U-shaped extrusion  58  and the flip stop assembly  16  with the parts aligned with each other.  FIG. 7C  is an exploded view of  FIG. 7B  with an additional flip arm  32  to illustrate coupling to the U-shaped extrusion  58 . 
       FIG. 8A  is a perspective of the custom made U-shaped extrusion  58  illustrating the threaded hole  60  near the side of the side wall and a notch  64  located on the inside corner of the extrusion  58 .  FIG. 8B  illustrates the angle of the outside of the U-shaped extrusion wall  66  designed to fit the angle of the inside of the injection molded jig  10 .  FIG. 8C  is the same perspective as  FIG. 8B  and illustrates small grooves  98  above and below the threaded hole  60  for the option of gluing the extrusion  58  in place inside the jig  10 .  FIG. 8D  illustrates a notch  64  in the inside corner of the extrusion  58  which allows the side walls  66  to be angled slightly for a snug fit inside the jig.  FIG. 8E  is a close-up view of the notch  64 . 
       FIG. 9A  is a perspective of the flip arm assembly  16  secured on the long bolt  34  attached to the side of the jig  10 .  FIG. 9B  is a close up of the flip stop assembly  16  illustrating the nut  46  locking the bolt  34  to the jig  10  and showing the detail of the V-notch  42  in the middle of the flip arm  32  not contacting the support workpiece support board.  FIG. 9C  is a close-up view of the flip stop arm  32 .  FIG. 9D  illustrates the flip arm assembly  16  positioned on a threaded bolt  34  positioned away from the jig  10  and the flip stop arm  32  is in contact with the tip of a mitered board  68 .  FIG. 9E  is a detail of the miter point pf the mitered board  68  in contact with flip arm  32 . 
       FIG. 10A  shows the drill guide block  12  sliding into the portable base  70 .  FIG. 10B  is an expanded view of the portable base  70 , the decal/indicia  24 , and the flip arm  32  and the custom extrusion  72 .  FIG. 10C  is a perspective cut away view of the portable base  70  and the screws  50  that fit through the holes inside the base and thread into the holes  60  on the top of the custom made extrusion  72 .  FIG. 10D  is an end view of the portable custom designed extrusion  72  showing a T-slot  97 , hole  40  and a U-channel  71 .  FIG. 10E  is a sectional view of the custom extrusion  72  illustrated in  FIG. 10D  showing how the flip stop assembly  16  is connected to the jig  10  with a threaded bolt  34 . 
       FIG. 11A  is a perspective showing the angle of a miter joint resting on the portable base  70  floor with the tip of the mitered board  68  contacting the flip stop arm  32  secured to the jig  10  with a long bolt  34 .  FIG. 11B  is a close-up view of the  FIG. 11A  illustrating the decal/indicia  24  viewable from the front of the portable base  70  floor.  FIG. 11C  illustrates the tip of the mitered board  68  in contact with the flip arm  32 . The functional visibility of the decal/indicia  24  on at least one surface or from at least one vantage allows a user to precisely position a workpiece in relation to the various openings in the jig  10 , even when the openings on the vertical face of the jig  10  are obscured, in whole or in part, by the workpiece. 
       FIG. 12A  illustrates a version of the flip assembly with the material support arm  84  secured to the jig with a bolt  34 .  FIG. 12B  illustrates the slot  44  added to the in the flip arm  84  to easily remove and reposition the adjustment bolt assembly.  FIG. 12C  is an enlarged view of  FIG. 12A .  FIG. 12D  illustrates a V-notch  99  made in the middle of the flip arm  84 , such as the KREG flip arm.  FIG. 12E  is a perspective view of the V-notch  99  added to the flip arm  84 . 
       FIG. 13A  illustrates a modified material support arm  84 , such as the KREG arm, that was drilled and taped at 90 degrees from the through hole used to attach the arm  84  (shown in  FIG. 12A ). It is threaded on to a bolt  34  fitted to the jig  10  and secured with a nut  46 .  FIG. 13B  is a close-up view of  FIG. 13A .  FIG. 13C  illustrates  FIG. 13A  with a mitered board  68  contacting the support arm  84 .  FIG. 13D  is a close up of  FIG. 13C  showing the miter point against the support arm stop  84 .  FIG. 13E  illustrates a workpiece resting on the material support base  86 , such as the KREG material support base, with the thin metal flip arm  32  of the invention elevated to engage the end of the board to record the desired position of the workpieces. The base on the left has the flip stop arm  32  in the active position  80  while the flip stop arm  32  on the right is below the workpiece in the stand by position  82 . 
       FIG. 14A  is a perspective of the jig  10  with the drill guide block  12  removed to show the decal/indicia  24  of the invention, which in one form is a piece of screen-printed thin aluminum sheet stock die cut in a T-shape  76  with the shape of two rectangles connected to each other.  FIG. 14B  is a close up of the decal/indicia  24 . The decal/indicia  24  can also be printed on an adhesive backed label, laser etched and painted, and the like.  FIG. 14C  is a close-up view of the decal/indicia  24  fitted between the two elevated ribs  78  on the floor of the jig  10 . 
       FIG. 15A  shows how the body of the drill guide block  12  fits into the portable base  70 .  FIG. 15B  is an exploded view of the decal/indicia  24  and the portable base  70 . It shows that the decal/indicia is bent at 90 degrees so that it also covers the front floor of the portable base  70 .  FIG. 15C  shows the decal/indicia  24  positioned between the elevated ribs at the bottom of the injection molded portable base  70  floor.  FIG. 15D  is a close-up view of  FIG. 15C  illustrating how the 90 degree bend in the decal/indicia  24  allows it to be viewed from the front of the jig  10 .  FIG. 15E  is a close up of  FIG. 15C  showing just the dotted center lines of the pocket hole combinations  27 . 
       FIG. 16A  is a view of the pocket hole jig  10  with the clamp removed for easy viewing of the decal/indicia  24  on the front of the jig  10 .  FIG. 16B  is an enlargement of  FIG. 16A  showing the relationship between the three pocket hole guide bushings A  13 , B  15  and C  17  and the decal/indicia  24 . The wide blue line  45  represent the middle of the drill guide holes. 
       FIG. 17A  is a smaller version of  FIG. 16B  sized so that it can be illustrated on a page with the other sectors of information shown next to each other. It shows the combination of all three holes  91 .  FIG. 17B  illustrates  92  which the smaller B  15  and C  17  hole combination.  FIG. 17C  illustrates  93  which is the medium size  15  an  13  and hole combination.  FIG. 17D  illustrates  94  which is the widest  17  and  13  hole combination.  FIGS. 17E , F, G and H illustrate the pocket hole center line combinations.  FIGS. 17I , J, K and L illustrate the pocket hole center line combinations  9 . Looking at  FIGS. 17D and 17H , the wide blue lines represent the respective centers of the aligned holes  17  and  13 . Then, as shown in  FIG. 17L , the dashed line represents the center line between the holes  17  and  13 . Turning to  FIGS. 17C and 17G , the wide blue lines represent the respective centers of the aligned holes  15  and  13 . Then, as shown in  FIG. 17K , the dashed line represents the center line between the holes  15  and  13 . Turning to  FIGS. 17B and 17F , the wide blue lines represent the respective centers of the aligned holes  17  and  15 . Then, as shown in  FIG. 17J , the dashed line represents the center line between the holes  17  and  15 . Finally, all of the wide blue lines are illustrated on  FIG. 17E  representing the respective centers of aligned holes  17 ,  15  and  13 . And  FIG. 17I  includes the dashed line representations of the respective centers between paired combinations of the holes  17 ,  15  and  13 . The functionality provided by the decal/indicia  24  properly engaged with and aligned to the plurality of drill guide passageways allows for precise, quick, repeatable and convenient positioning of a workpiece on the jig  10  to form the desired arrangement of holes in the workpiece. 
       FIG. 18A  illustrates the relationship of the pocket hole combinations using the symbols for yellow and silver.  91  is the pocket hole combination of holes  17 ,  15  and  13 .  92  is the pocket hole combination of holes  17  and  15 .  93  is the pocket hole combination of holes  15  and  13 .  FIG. 18B  is an enlarged version of  FIG. 18A  illustrating the overlap of combinations  92  and  93 .  FIG. 18C  illustrates the combination of lines and colored symbols. 
       FIG. 19A  shows the workpiece  14  clamped in the pocket hole jig  10  with the center line  85  of the workpiece  14  aligned with the dotted center line of hole combinations  92  of the decal/indicia  24  shown in  FIG. 17J .  FIG. 19B  is an enlargement of  FIG. 19A .  FIG. 19C  shows the workpiece  14  centered on the yellow area of the decal/indicia  53 .  FIG. 19D  is an enlargement of  FIG. 19C . The decal/indicia  24  can be configured to include color coding and line markings, such that the functional relationships both between the workpiece and the respective indicia can be discerned and between the color coding and line markings. 
     Preferred embodiments of the invention have been described in considerable detail. Many modifications and variations to the preferred embodiments described will be apparent to a person of ordinary skill in the art. Therefore, the invention should not be limited to the embodiments described.