U.S. patent application number 14/074476 was filed with the patent office on 2014-03-06 for shelf pin hole jig.
This patent application is currently assigned to KREG ENTERPRISES, INC.. The applicant listed for this patent is KREG ENTERPRISES, INC.. Invention is credited to Scott L. Clark.
Application Number | 20140064868 14/074476 |
Document ID | / |
Family ID | 46600726 |
Filed Date | 2014-03-06 |
United States Patent
Application |
20140064868 |
Kind Code |
A1 |
Clark; Scott L. |
March 6, 2014 |
SHELF PIN HOLE JIG
Abstract
A shelf pin hole jig for drilling shelf pin holes having a main
body and an alignment member removably connected to the main body
for aligning the jig. The main body has a plurality of guide
channels with hardened guide inserts for receiving and guiding a
drill bit with a stop collar. Removably connected to either side of
the main body is an alignment member which extends below the main
body and is used for alignment of the jig. The main body also has a
plurality of compartments for holding drill bits and alignment
pins.
Inventors: |
Clark; Scott L.; (Boone,
IA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KREG ENTERPRISES, INC. |
Huxley |
IA |
US |
|
|
Assignee: |
KREG ENTERPRISES, INC.
Huxley
IA
|
Family ID: |
46600726 |
Appl. No.: |
14/074476 |
Filed: |
November 7, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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13020277 |
Feb 3, 2011 |
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14074476 |
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Current U.S.
Class: |
408/241B ;
408/241G |
Current CPC
Class: |
B25H 3/003 20130101;
Y10T 408/03 20150115; Y10T 408/567 20150115; B23B 49/02 20130101;
B23B 49/023 20130101; Y10T 408/97 20150115; Y10T 408/569 20150115;
Y10T 408/98 20150115; B23B 47/287 20130101 |
Class at
Publication: |
408/241.B ;
408/241.G |
International
Class: |
B23B 49/02 20060101
B23B049/02; B23B 47/28 20060101 B23B047/28 |
Claims
1-17. (canceled)
18. A shelf pin hole jig for drilling shelf pin holes comprising: a
main body having a top side and a bottom side; an alignment member
connected to the main body; the main body having a plurality of
guide channels which extend through the main body; wherein the
plurality of guide channels have a top edge and a bottom edge;
wherein the top edge of the plurality of guide channels extend
above the top side of the main body a distance.
19. The shelf pin hole jig of claim 18 wherein the bottom edge of
the plurality of guide channels is positioned in approximate flush
alignment with the bottom side of the main body to improve quality
of the drilled hole and prevent tear-out.
20. The shelf pin hole jig of claim 18 wherein the plurality of
guide channels are positioned in a straight row along the main
body.
21. The shelf pin hole jig of claim 18 wherein the plurality of
guide channels include a hardened metallic insert having a central
bore.
22. The shelf pin hole jig of claim 18 wherein the plurality of
guide channels include a hardened metallic insert having a central
bore and a lip positioned adjacent the top edge that serves as an
extended stop surface.
23. The shelf pin hole jig of claim 18 wherein the plurality of
guide channels include a hardened metallic insert having a central
bore and a lip positioned adjacent the bottom edge that serves as
an extended surface that prevents tear-out.
24. The shelf pin hole jig of claim 18 further comprising a
plurality of support members connected to the guide channels.
25. The shelf pin hole jig of claim 18 further comprising a
compartment in the main body.
26. The shelf pin hole jig of claim 18 wherein the alignment member
is removably connectable to a first lateral side and a second
lateral side of the main body.
27. A shelf pin hole jig for drilling shelf pin holes comprising: a
main body having a top side and a bottom side; an alignment member
connected to the main body; the main body having a plurality of
guide channels which extend through the main body; wherein the
plurality of guide channels have a top edge and a bottom edge;
wherein the plurality of guide channels include a hardened insert
having a central bore; wherein hardened inserts are formed of a
metallic material; wherein the main body is formed of a material
selected from the group consisting of a plastic, a thermoplastic or
a composite.
28. The shelf pin hole jig of claim 27 wherein the bottom edge of
the plurality of guide channels is positioned in approximate flush
alignment with the bottom side of the main body to improve quality
of the drilled hole and prevent tear-out.
29. The shelf pin hole jig of claim 27 wherein the plurality of
guide channels are positioned in a straight row along the main
body.
30. The shelf pin hole jig of claim 27 wherein the hardened inserts
have a lip positioned adjacent the top edge that serves as an
extended stop surface.
31. The shelf pin hole jig of claim 27 wherein the hardened inserts
have a lip positioned adjacent the bottom edge that serves as an
extended surface that prevents tear-out.
32. The shelf pin hole jig of claim 27 further comprising a
plurality of support members connected to the guide channels.
33. The shelf pin hole jig of claim 27 further comprising a
compartment in the main body.
34. The shelf pin hole jig of claim 27 wherein the alignment member
is removably connectable to a first lateral side and a second
lateral side of the main body.
35. A shelf pin hole jig for drilling shelf pin holes comprising: a
main body having a top side and a bottom side; an alignment member
connected to the main body; the main body having a plurality of
guide channels that include a bore which extend through the main
body; a first compartment positioned in the main body; wherein the
first compartment is configured to hold a relocation pin member, a
straight drill bit or a stepped drill bit.
36. The shelf pin hole jig of claim 35 further comprising a second
compartment positioned in the main body; wherein the second
compartment is configured to hold a relocation pin member, a
straight drill bit or a stepped drill bit.
37. The shelf pin hole jig of claim 35 further comprising a third
compartment positioned in the main body; wherein the third
compartment is configured to hold a relocation pin member, a
straight drill bit or a stepped drill bit.
38. The shelf pin hole jig of claim 35 wherein the first
compartment is positioned in the bottom side of the main body.
39. The shelf pin hole jig of claim 35 wherein the first
compartment includes a cover removably placed over the first
component to hold components therein.
40. The shelf pin hole jig of claim 35 wherein the first
compartment includes a rotating paddle to hold components
therein.
41. An extended shelf pin hole jig for drilling shelf pin holes
comprising: a first main body and a second main body having a top
side and a bottom side; the first main body and second main body
extending a length between a first end and a second end, and
extending a width between a first side and a second side; the first
main body and second main body having a plurality of guide channels
that include a bore which extend through the main body; wherein the
first main body and the second main body are connected in
end-to-end relation for form an extended shelf pin hole jig.
42. The extended shelf pin hole jig of claim 41 wherein the first
main body and the second main body are connected by a connecting
member.
43. The extended shelf pin hole jig of claim 41 wherein the first
main body and the second main body are connected by a connecting
member positioned within a notch in adjacent ends of the first main
body and the second main body.
44. The extended shelf pin hole jig of claim 41 wherein the first
main body and the second main body are connected by a connecting
member which is screwed, bolted or pinned to the first main body
and the second main body.
45. The extended shelf pin hole jig of claim 41 further comprising
at least one alignment member removably connected to the first side
or second side of the extended shelf pin hole jig.
46. A shelf pin hole jig kit for drilling shelf pin holes
comprising: a main body having a top side and a bottom side; the
main body extending a length between opposing first end and second
end, and extending a width between opposing first side and second
side; the main body having a plurality of guide channels which
extend through the main body; an alignment member removably
connectable to the first side or the second side of the main body;
a stepped drill bit having a stop collar; a relocation pin
member.
47. The shelf pin hole jig kit of claim 46 wherein the relocation
pin member has a main shaft and stepped portion wherein the main
shaft has a diameter closely matching the diameter of the plurality
of guide channels, and the stepped portion has a diameter less than
the diameter of the plurality of guide channels.
48. The shelf pin hole jig kit of claim 46 further comprising a
straight drill bit having a stop collar.
49. The shelf pin hole jig kit of claim 46 wherein the main body
has at least one compartment for holding a stepped drill bit or the
relocation pin member.
Description
BACKGROUND OF THE INVENTION
[0001] This invention is directed towards a wood working jig. More
particularly and without limitation, this invention is directed
towards a wood working jig for making shelf holes.
[0002] Various shelving systems are old and well known in the art.
Common shelving systems are made of wood, pressboard, plywood or
other composite materials and are manufactured by screwing an
opposing top and bottom to opposing sidewalls so as to form a
frame. Once this frame is assembled the shelves are then glued and
screwed in place. While this manufacturing method produces a sturdy
and rigid shelving system the shelves are permanently affixed and
therefore can not be easily moved.
[0003] To allow for variable shelf spacing, shelf pin hole systems
were developed. These systems utilize a plurality of shelf pin
holes which are drilled into the interior surface of the opposing
sidewalls. Most often, these shelf pin holes are drilled at varying
heights in two columns on each sidewall, each column spaced
inwardly from the respective front and back edge of the sidewall.
To position a shelf using this system, a user selects a height for
the shelf and inserts a shelf pin into each of the four
corresponding shelf pin holes for that height. The shelf pin holes
matingly and frictionally receive the shelf pins which partially
extend outwardly from the shelf pin holes. The shelf is then placed
on top of the outwardly extending shelf pins thereby providing
support in each corner of the shelf. This system allows the user to
vary the spacing of the shelves by simply selecting a different row
of shelf pin holes.
[0004] Manufacturers of shelving systems often drill these shelf
pin holes into the interior surfaces of the sidewalls as part of
the manufacturing process. While this is convenient, many times
additional shelf pin holes are necessary or desired, such as in the
case of an existing shelf pin tearing-out, or when the pattern of
shelf pin holes are not at the desired location. To assist in
drilling these additional shelf pin holes, various shelf pin hole
jigs have been developed.
[0005] A common conventional shelf pin hole jig comprises a flat
piece of plastic or composite material having a plurality of holes
spaced therein. This flat device is then laid against the interior
surface of the sidewall of the shelving system and a shelf pin bit
is used to drill the shelf pin holes. While somewhat effective,
problems exist in this process. First, the conventional shelf pin
hole jig which comprises merely of a flat body is difficult to
properly and accurately align and the jig provides very little
guidance for the drill bit which makes it difficult to properly
place the hole shelf pin hole, and easy to angularly misalign the
shelf pin hole. In addition, these jigs require the use of a
specially designed, complex, expensive and difficult to use shelf
pin bit that has multiple moving parts. Using these shelf pin bits
is undesirable as they often can break or malfunction because of
wood chips getting stuck in the moving parts of the bit. In
addition, these shelf pin bits are long in length which is also
undesirable as many times space is limited when drilling shelf pin
holes.
[0006] Therefore, an objective of the invention is to provide a
shelf pin hole jig that is more easily and accurately aligned than
conventional jigs.
[0007] Another objective of the invention is to provide a shelf pin
hole jig that allows for easier and more accurate alignment of the
shelf pin hole itself.
[0008] Another objective of the invention is to provide a shelf pin
hole jig that is more economical than prior art jigs.
[0009] These and other objectives will be apparent to those skilled
in the art from the following description, drawing and claims.
BRIEF SUMMARY OF THE INVENTION
[0010] A shelf pin hole jig for drilling shelf pin holes having a
main body and an alignment member removably connected to the main
body for aligning the jig. The main body has a plurality of guide
channels with hardened guide inserts for receiving and guiding a
drill bit with a stop collar. Removably connected to either side of
the main body is an alignment member which extends below the main
body and is used for alignment of the jig. The main body also has a
plurality of compartments for holding drill bits and alignment
pins.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a perspective blown up view of two shelf pin hole
jigs in end to end alignment;
[0012] FIG. 2 is a plan view of the bottom of a shelf pin hole
jig;
[0013] FIG. 3 is a plan view of the side of a blown up shelf pin
hole jig; and
[0014] FIG. 4 is a perspective view of a blown up shelf pin hole
jig.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] With reference to the figures, a shelf pin hole jig 10 has a
main body 12. Main body 12 has a top side 14, a bottom side 16,
opposing side surfaces 18 and opposing first and second ends 20. In
a preferred embodiment, main body 12 takes on a generally
rectangular shape with opposing side surfaces 18 and opposing first
and second ends 20 being in parallel spaced alignment with one
another; with side surfaces 18 being in perpendicular alignment
with first and second ends 20. In a preferred embodiment side
surfaces 18 and ends 20 are generally straight and flat so as to
assist with easy alignment with work pieces however any other shape
is contemplated. Preferably main body 12 is formed out of an
injection molded plastic, thermoplastic or other composite material
or the like material. Alternatively, main body 12 is formed or
machined out of a solid piece of material such as a metal, plastic
or like material.
[0016] Extending through main body 12 from top side 14 to bottom
side 16 is a plurality of guide channels 22. Each guide channel 22
extends through main body 12 in perpendicular alignment with the
top surface 14 and bottom surface 16. The bottom edge of each guide
channel 22 is generally flush with, or within a close tolerance of,
bottom surface 16 of the main body 12 so as to improve the quality
of a drilled hole and prevent hole tear-out. In contrast, the top
edge of each guide channel 22 extends outwardly and above the top
14 surface of main body 12. The plurality of guide channels 22
extend in parallel spaced alignment with side surfaces 18 and
extend from first end to second end 20 of main body 12.
[0017] Each channel 22 has a hardened metallic guide insert 24
having a central bore 26 which is cylindrical in shape. The top
edge of each guide insert 24 terminates in a shelf or lip 27 which
extends outwardly in perpendicular alignment to central bore 26 as
does the bottom edge of guide insert 24. Lip 27 provides an
extended stop surface so as to engage and stop a stop collar on a
drill bit positioned within bore 26. Similarly the bottom edge of
guide insert assists in drilling a clean hole by having an extended
surface in contact with or in close tolerances of the work piece.
In a preferred embodiment, the center of the bore 26 of guide
channels 22 are positioned in equal spacing to one another, such as
1-inch apart. However in an alternative arrangement spacing of the
guide channels 22 varies. Also in a preferred embodiment guide
channels 22 are positioned more closely to one of the side surfaces
18 than they are the other.
[0018] Each guide insert 24 is connected to the main body 14 by
supporting material 28 which surrounds and holds the guide insert
24 in place as well as provides required structural integrity to
the device 10. In one embodiment, the top edge and bottom edge of
the guide inserts 24 and supporting material 28 are in parallel
alignment thereby providing an extended stop surface 27. To further
add rigidity, support members 30 extend outwardly from support
material 28 which further connect support material 28 and guide
channel 22 to main body 12. These support members 30 are located on
both the top surface 14 and the bottom surface 16 and preferably
extend outwardly from the guide channel 22 in perpendicular
alignment to one another. Preferably four support members 30 extend
out of each guide channel 22 however more support members 30, such
as 5, 6 or more are contemplated as are less support members 30
such as 3, 2 or 1.
[0019] Removably connected to main body is alignment member 34.
Alignment member 34 is generally rectangular in shape and
preferably extends the length of side surface 18 of main body 12
and when in locked position the ends 20 of alignment member 34 are
flush with the ends 20 of main body 12. Alignment member 34 is
preferably connected to the bottom side 16 of main body 12 however
alignment member is attached to the side surface 18 or any other
portion of main body 12 in other arrangements. Alignment member 34
has a flat bottom surface 36, a flat interior edge or alignment
edge 38 and a top surface 40 having a plurality of extension
members 42 extending upwardly therefrom. In one embodiment the
center of bore 26 of each guide channel 22 is positioned 1-inch
inward from alignment edge 38 on one side of main body 12, and
2-inches inward from alignment edge 38 on the opposing side of main
body 12. In an alternative arrangement guide channels 22 extend
down the center of main body 12 or at any other spacing in relation
to opposing side surfaces 18. Extension members 42 preferably are
narrower than alignment member 34 and are preferably rectangular in
shape and are in spaced alignment with one another.
[0020] Connected to the extension members 42 is a snap locking
feature 44 which is used to connect alignment member 34 to main
body. Any locking feature capable of connecting one device to
another is contemplated such as snapping members, frictionally
engaging members, screws, nuts and bolts, or the like. In one
example, locking feature 44 has a circular disk 46 connected to the
top of a narrower support column 48. Locking members 44 are
preferably positioned towards one end of each extension member 42,
or alternatively every other extension member 42.
[0021] Extending along each side surface 18 of main body 12 are
locking channels 50. Locking channels 50 have a plurality of
recesses 52 positioned in the bottom side 16 of main body 12 which
are of any size and shape to matingly and frictionally receive
extension members 42. As one example, if extension members 42 are
rectangular in shape, recesses 52 are similarly rectangular in
shape. In addition, the top side 14 of locking channels 50 also
have recesses 52 positioned therein which correspond to the
recesses positioned in the bottom side 16 of the main body 12. The
recesses 52 in the top side 14 provide needed space for the locking
member 44 to slide into place unimpeded by a user's hand when
assembling the device.
[0022] Positioned in the top surface of recesses 52 is a key hole
54 which is sized and shaped to receive snap locking feature 44.
Like locking feature 44, keyhole 54 is positioned towards one end
of each recess 52 so as to match the placement of locking feature
44. In a preferred embodiment, key hole 54 has a first opening 56
which is connected to a narrower second opening 58. First opening
56 is sized to allow disk 46 to pass therethrough, whereas second
opening 58 is sized to frictionally and lockingly receive support
column 48 but not allow disk 46 to pass therethrough. In this way,
key hole 54 lockingly retains snap locking feature 44 in place.
[0023] Also positioned on the bottom side 16 of main body 12 are a
plurality of compartments 60 or holding and retaining tools and
other objects which are used in the shelf pin hole drilling
process. Any number of compartments 60 are used, each compartment
60 having a cover 62 which is removably placed over compartment 60
so as to hold the contents therein. Cover 62 preferably is flush
with or does not extend beyond the bottom plane 16 of main body 12.
Cover 62 has rotating paddle 64 which is connected to main body 12
and frictionally held in place by way of locking screw 66. Rotating
paddle 64 rotates between a first position where objects are
removable and replaceable within the compartment and a second
position where rotating paddle 64 covers compartment 60 thereby
holding objects therein. As one example, main body 12 has a first
compartment 68 which is generally rectangular in shape.
[0024] First compartment 68 has at least one and preferably two
cradles 70 extending across compartment 68. Each cradle 70 has a
semi-circular cut-out positioned therein so as to matingly receive,
retain and hold relocation pin member 72 in place. As another
example, main body 12 has a second compartment 74 which has a first
section 76 which receives a shaft section of straight drill bit 78,
and a second section 80 which receives a stop collar 82 connected
to straight drill bit 78. As another example, main body 12 has a
third compartment 84 which has a first section 76 which receives a
shaft section of a stepped drill bit 86, and a second section 80
which receives a stop collar 82 connected to stepped drill bit
86.
[0025] The compartments preferably contain a relocation pin member
72, a straight drill bit 78 having a stop collar 82 and a stepped
drill bit 86 having a stop collar 82. There are two most common
sizes of shelf hole pins, 1/4 inch and the smaller 5 mm. To
facilitate the use of shelf pin hole jig 10 with both sizes of
common shelf hole pins, the main shaft section of relocation pin
member 72, straight drill bit 78 and stepped drill bit 86 match the
larger 1/4 inch diameter, which also preferably matches the
diameter of bore 26 of guide channels 22 within a close tolerance.
This close tolerance of the shafts of these devices 72, 78, 86
holes to accurately guide the drill bits 78, 86 or relocation pin
member 72 thereby forming a more accurate shelf pin hole.
Relocation pin 72 and stepped drill bit 86 each have a step 90
wherein the shaft transitions from 1/4 inch to the narrower 5 mm
format.
[0026] A connecting member 92 is connected to the bottom side 16 of
each end 20 of main body 12 and extends outwardly from end 20 so as
to connect two main bodies 12 in end to end relation. Connecting
member 92 is any size and shape capable of facilitating the
connection of two main bodies 12 in end to end relation. However,
in a preferred embodiment, connecting member 92 is rectangular in
shape and is matingly received by notch 94 positioned within end
20. When in position, connecting member 92 is flush with the bottom
surface 16 of main body 12. Connecting member 92 is removably and
replaceably connected to main body 12 by any means known in the art
such as a snap fit, screws or the like, however a plurality of
locking pins 96 which pass through connecting member 92 and are
received by main body 12 are preferably used. In this way two main
bodies 12 are connected in end to end relation through the use of
connecting member 92.
[0027] In operation, the user determines whether the user wants the
setting where the shelf pin holes are closer to the edge of the
workpiece or farther from the edge of the work piece. Based on this
determination the user selects a side 18 of main body 12 to attach
alignment member 34. This is accomplished by inserting the
extension members 42 of alignment member 34 into the corresponding
recesses 52 of locking channel 50. The user then inserts disk 46 of
snap locking feature 44 through the larger first opening 56 of the
key hole 54. Once this is accomplished, the user slides the
alignment member 44 towards the smaller second opening 58 until the
snap locking feature 44 is locked, or snapped into place. When
doing so, alignment member 44 is locked in place by key hole 54 as
the second opening 58 frictionally holds support column 48 and
prevents disk 46 from passing therethrough. When in place, ends 20
of the alignment member 44 is flush with ends 20 of main body
12.
[0028] Next, the user sets the bottom surface 16 of main body 12 on
the workpiece and aligns the interior edge 38 of alignment member
34 along the edge of the workpiece so that both the bottom surface
16 of main body 12 and interior edge 38 of alignment member 34 are
in flush contact with the workpiece. If using an existing shelf pin
hole to align the jig 10, the user then inserts relocation pin
member 72 through the bore 26 of a guide channel 22.
[0029] Whether the user inserts the stepped end 90 non-stepped end
of the relocation pin member 72 depends on the size of the existing
shelf pin hole. Once properly aligned, the user drills the desired
shelf pin holes. To do so, the user selects whether to use the
straight drill bit 78 or the stepped drill bit 86. Once the proper
drill bit is selected and installed on a drill motor, the user
drills the shelf pin hole by passing the drill bit 78, 86 through
each of the guide channels 22 until the stop collar 82 engages the
top surface of guide channel 22, or lip 27.
[0030] The depth of the shelf pin hole is set by the combination of
the stop collar 82, the length of the shaft 88 and the length of
the guide channel 22. The stop collar 82 is either permanently
affixed to the shaft 88 of drill bit 78, 86 thereby setting the
length of shaft 88; alternatively, stop collar 82 is adjustable on
shaft 88. When stop collar 82 is adjustable on shaft 88, stop
collar 82 is held in place by an adjustable locking mechanism (not
shown) such as a locking screw or a plurality of locking screws, or
the like, that pass through the stop collar 82 and engage the shaft
88 thereby adjustably setting the depth of the shelf pin hole. The
depth can easily be set using the shelf pin hole jig 10 by placing
the drill bit 78, 86 into a compartment 68, 74 and adjusting the
stop collar 82 to be positioned within second section 80 with shaft
88 held within cradle 70. Due to the close tolerances of
compartments 68, 74, once shaft 88 is positioned within cradle 70
and stop collar 82 is positioned within second section 80 the depth
of the stop collar 82 is matched to the shelf pin hole jig 10 and
more specifically to the length of channels 22. Once in this
position the stop collar 82 is locked in place on shaft 88 in its
optimal position.
[0031] Accuracy of the angle of the shelf pin hole is maintained by
close tolerances between the guide channel 22 and the shaft of each
of the relocation pin member 72, the straight drill bit 78, and the
stepped drill bit 86; this is true even when drilling shelf pin
holes that are smaller than the bore 26 of the guide channels 22
through the use of the stepped relocation pin member 72 and the
stepped drill bit 86. That is, while the portion of the pin 72 or
drill bit 86 that actually goes into the shelf pin hole may be
smaller than the bore 26, the portion of the pin 72 or drill bit 86
that engages the bore 26 of guide channel 22 is within close
tolerances thereof, thereby tightly and accurately controlling the
placement of the shelf pin hole.
[0032] In another arrangement, should the user need additional
shelf pin holes, the user attaches two shelf pin hole jigs 10 in
end to end relation through the use of connecting member 92. In
this arrangement, the user inserts connecting member 92 into notch
94 on the bottom side 16 of main body 12. The user then inserts
locking pins, screws, bolts or the like 96 through connecting
member 92 and into main body 12 thereby locking connecting member
92 to the first main body. This process is then repeated for the
second main body 12. This results in a pair of main bodies 12 being
aligned and connected in end-to-end relation which allows a user to
drill an extended array of shelf pin holes without having to
relocate the jig 10.
[0033] From the foregoing description it is apparent that a shelf
pin hole jig is presented that is more easily and accurately
aligned than conventional jigs, and does not require the use of a
complicated shelf pin bit with multiple moving parts, as well as
meeting other goals and objectives.
[0034] It will be appreciated by those skilled in the art that
other various modifications could be made to the device without
parting from the spirit and scope of this invention. All such
modifications and changes fall within the scope of the claims and
are intended to be covered thereby.
* * * * *