U.S. patent application number 11/679577 was filed with the patent office on 2007-06-21 for frame assembly of blanking tool.
Invention is credited to Frank E. Oetlinger.
Application Number | 20070142195 11/679577 |
Document ID | / |
Family ID | 29710219 |
Filed Date | 2007-06-21 |
United States Patent
Application |
20070142195 |
Kind Code |
A1 |
Oetlinger; Frank E. |
June 21, 2007 |
FRAME ASSEMBLY OF BLANKING TOOL
Abstract
A frame member is provided for a lower blanking tool frame
assembly of a carton die cutting machine. The frame assembly
includes an outer frame for supporting a sheet of die cut paper
material during a blanking operation. The sheet of paper material
defines a substantially horizontal plane. An inner grid is
supported by the outer frame. The inner grid is defined by a
plurality of bars having first and second sides. The first side of
each bar includes a longitudinally extending notch.
Inventors: |
Oetlinger; Frank E.;
(Grafton, WI) |
Correspondence
Address: |
BOYLE FREDRICKSON NEWHOLM STEIN & GRATZ, S.C.
250 E. WISCONSIN AVENUE
SUITE 1030
MILWAUKEE
WI
53202
US
|
Family ID: |
29710219 |
Appl. No.: |
11/679577 |
Filed: |
February 27, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
10846058 |
May 14, 2004 |
7182235 |
|
|
11679577 |
Feb 27, 2007 |
|
|
|
10197190 |
Jul 17, 2002 |
6796474 |
|
|
10846058 |
May 14, 2004 |
|
|
|
10164478 |
Jun 6, 2002 |
6708858 |
|
|
10197190 |
Jul 17, 2002 |
|
|
|
Current U.S.
Class: |
493/468 |
Current CPC
Class: |
Y10T 403/7041 20150115;
Y10T 403/7123 20150115; Y10T 225/379 20150401; Y10T 403/68
20150115; Y10T 83/95 20150401; Y10T 225/30 20150401; B26D 2007/189
20130101; Y10T 403/7064 20150115; Y10T 225/371 20150401; Y10T
403/7117 20150115; B26D 7/2614 20130101; B26D 2007/1881 20130101;
F16B 7/048 20130101; B26D 7/1818 20130101; Y10T 225/329 20150401;
F16B 2200/403 20180801; Y10T 83/9457 20150401; Y10T 403/4602
20150115; Y10T 225/297 20150401; Y10T 403/3906 20150115; Y10T
403/46 20150115; Y10T 403/73 20150115; Y10T 403/39 20150115; Y10T
403/7111 20150115 |
Class at
Publication: |
493/468 |
International
Class: |
B31B 1/28 20060101
B31B001/28 |
Claims
1. A frame assembly for a lower blanking tool of a carton die
cutting machine, comprising: an outer frame for supporting a sheet
of die cut paper material during a blanking operation, the sheet of
paper material defining a substantially horizontal plane and the
outer frame including: a pair of opposite, spaced apart
longitudinally extending side rails; and a pair of opposite, spaced
apart cross rails extending crosswise between said side rails; and
a plurality of lengthwise bars extending axially between the side
rails and having first and second longitudinally extending sides,
the first sides of the lengthwise bars rails include longitudinally
extending slots therein.
2. The frame assembly of claim 1 further comprising a plurality of
crosswise bars extending axially between the cross rails and having
first and second longitudinally extending sides, the first sides of
the crosswise bars including longitudinally extending slots
therein.
3. The frame assembly of claim 1 wherein the plurality of
lengthwise bars are generally parallel.
4. The frame assembly of claim 1 wherein the plurality of crosswise
bars are generally parallel.
5. The frame assembly of claim 1 wherein each of said cross rails
having an inner surface disposed substantially transverse to the
plane defined by said sheet of paper material and having a T-shaped
slot formed therein opening to said inner surface, each of said
side rails having an upper surface disposed substantially parallel
to the plane defined by said sheet of paper material and having a
T-shaped slot formed therein opening to said upper surface, said
T-shaped slots each defining a downwardly extending axis disposed
at an acute angle with respect to the plane defined by said sheet
of paper material.
6. The frame assembly of claim 5 further comprising a plurality of
corner pieces rigidly interconnecting said rails together, each
corner piece including fasteners extending into the T-shaped slots
of adjacent side and cross rails.
7. The frame assembly of claim 5 wherein said T-shaped slot is
formed along the entire length of said side rails.
8. The frame assembly of claim 5 wherein said T-shaped slot is
formed along the entire length of said cross rails.
9. The frame assembly of claim 6 wherein each cross rail includes a
ledge formed in said inner surface, and each corner piece has a lip
projecting therefrom that engages said ledge.
10. The frame assembly of claim 9 wherein said ledge is formed
along the entire length of each cross rail.
11. A frame member for a lower blanking tool frame assembly of a
carton die cutting machine, comprising: an outer frame for
supporting a sheet of die cut paper material during a blanking
operation, the sheet of paper material defining a substantially
horizontal plane; and inner grid supported by the outer frame, the
inner grid defined by a plurality of bars having first and second
sides, the first side of each bar including a longitudinally
extending notch.
12. The frame member of claim 11 wherein the outer frame includes
an elongated rail having an upper surface, a lower surface, an
outer surface and an inner surface, the rail having a
bolt-receiving T-shaped slot formed therein opening to the inner
surface and defining a downwardly extending axis disposed at an
acute angle with respect to said inner surface.
13. The frame member of claim 12 wherein said angle is between
about 30.degree. to about 80.degree..
14. The frame member of claim 12 wherein said angle is about
65.degree..
15. The frame member of claim 12 wherein the inner surface of said
rail further includes a ledge formed therein.
16. The frame assembly of claim 11 wherein the plurality of bars
includes a plurality of generally parallel lengthwise bars.
17. The frame assembly of claim 16 wherein the plurality of bars
includes a plurality of generally parallel crosswise bars generally
perpendicular to the lengthwise bars.
18. A frame assembly for a lower blanking tool of a carton die
cutting machine, comprising: an outer frame for supporting a sheet
of die cut paper material during a blanking operation, the sheet of
paper material defining a substantially horizontal plane and the
outer frame including: a pair of opposite, spaced apart
longitudinally extending side rails; and a pair of opposite, spaced
apart cross rails extending crosswise between said side rails; a
plurality of generally parallel, lengthwise bars extending axially
between the side rails and having first and second longitudinally
extending sides, the first sides of the lengthwise bars rails
including longitudinally extending slots therein; and a plurality
of generally parallel crosswise bars extending axially between the
cross rails and having first and second longitudinally extending
sides, the first sides of the crosswise bars rails including
longitudinally extending slots therein.
19. The frame member of claim 18 wherein the outer frame includes
an elongated rail having an upper surface, a lower surface, an
outer surface and an inner surface, the rail having a
bolt-receiving T-shaped slot formed therein opening to the inner
surface and defining a downwardly extending axis disposed at an
acute angle with respect to said inner surface.
20. The frame member of claim 19 wherein said angle is between
about 30.degree. to about 80.degree..
21. The frame member of claim 19 herein said angle is about
65.degree..
22. The frame member of claim 19 wherein the inner surface of said
rail further includes a ledge formed therein.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a divisional of U.S. Ser. No.
10/846,058, filed May 14, 2004 and entitled "Frame Assembly for
Carton Die Cutting Machine" which is a divisional of application
Ser. No. 10/197,190, filed Jul. 17, 2002, now U.S. Pat. No.
6,796,474, issued Sep. 28, 2004 and entitled "Jogger for Lower
Frame Assembly of Blanking Tool" which is a divisional of U.S. Ser.
No. 10/164,478, filed Jun. 6, 2002, now U.S. Pat. No. 6,708,858,
issued Mar. 23, 2004 and entitled "Clamp Pieces For Lower Frame
Assembly of Blanking Tool.
FIELD OF THE INVENTION
[0002] This invention relates generally to die cutting machines for
making carton blanks, and in particular, to jogger for aligning
carton blanks die cut from a sheet positioned on a frame assembly
for a lower blanking tool.
BACKGROUND AND SUMMARY THE INVENTION
[0003] In the manufacture of cartons, small sheets of paper
material having specific profiles are cut out of larger sheets of
paper material. These smaller sheets are known as carton blanks
that, in turn, are formed into cartons and/or boxes. The blanks are
formed during a process known as a blanking operation in a die
cutting machine.
[0004] In a die cutting machine, the blanks are cut, but not
removed from a large sheet of paper material. After the blanks have
been cut, the sheet is moved downstream in the die cutting machine
to a blanking station where the sheet is positioned over a frame
assembly for support. The frame assembly includes an outer frame
and an inner grid having large openings that correspond in size, in
shape and in position to the profile of the carton blank previously
cut. Below the frame is a mechanism for stacking the carton
blanks.
[0005] At the blanking station, an upper tool is used in
combination with the lower tool or frame assembly to knock the
carton blanks from the sheet of paper material while holding the
scrap material that surrounds the blanks. The upper tool has a
support board that moves vertically up and down in the die cutting
machine, and the support board typically has a plurality of
stand-offs depending therefrom that hold pushers spaced beneath the
board which in turn are used to push the carton blanks from the
sheet through the lower tool or frame assembly. A plurality of
presser assemblies are also mounted in the support board and depend
therefrom to hold the scrap material against the lower tool or
frame assembly during the blanking operation so that the blanks may
be pushed from the sheet. A presser assembly typically includes a
presser rail which is biased downwardly away from the support board
by a spring so that the rail is positioned slightly below the
pushers. As the upper tool is lowered, the presser rail engages the
sheet of paper material first such that a scrap portion of the
large sheet of material is secured between the presser rail and the
frame. The upper tool then continues to be lowered such that the
sheet of material engages the inner grid within the frame while at
substantially the same time the pushers engage the carton blanks
and knock the blanks out of the sheet of material and through the
inner grid. The carton blanks then fall into a stacking mechanism
below the frame where the blanks are stacked for further
processing.
[0006] The lower tool used in the blanking operation is typically
comprised of a steel or aluminum outer frame that supports an inner
grid. The inner grid is typically comprised of a plurality of
lengthwise and crosswise extending bars. In order to secure the
inner grid in place on the outer frame, the ends of each bar are
typically screwed onto attachment pieces which, in turn, are
mounted on the lengthwise and crosswise rails of the outer frame.
Since the frame and grid support a sheet of paper material during
the blanking operation, the grid must be configured to match or
conform to the die cut in the sheet of paper material. In addition,
the grid must be reconfigured whenever a different carton blank
needs to be produced. Thus, unscrewing the inner grid from the
outer frame oftentimes becomes very cumbersome and time
consuming.
[0007] Therefore, it is a primary object and feature of the present
invention to provide an improved frame assembly for a lower
blanking tool of a carton die cutting machine.
[0008] It is a further object and feature of the present invention
to provide a frame assembly for a lower blanking tool of a carton
die cutting machine that incorporates an inner grid that may be
easily attached to and positioned along the frame.
[0009] It is a still further object and feature of the invention to
provide a frame assembly for a lower blanking tool of a carton die
cutting machine that incorporates an inner grid which is compatible
with standard blanking operation machinery and which is relatively
inexpensive.
[0010] In accordance with the present invention, a frame assembly
for a lower blanking tool of a carton die cutting machine is
provided. The frame assembly includes an outer frame for supporting
a sheet of die cut paper material during a blanking operation. The
sheet of paper material defines a substantially horizontal plane.
The outer frame includes a pair of opposite, spaced apart
longitudinally extending side rails and a pair of opposite, spaced
apart cross rails extending crosswise between said side rails. A
plurality of lengthwise bars extend axially between the side rails
and have first and second longitudinally extending sides. The first
sides of the lengthwise bars rails include a longitudinally
extending slot therein.
[0011] A plurality of crosswise bars extend axially between the
cross rails and has first and second longitudinally extending
sides. The first sides of the crosswise bars include a
longitudinally extending slot therein. The plurality of lengthwise
bars are generally parallel and the plurality of crosswise bars are
generally parallel.
[0012] Each of the cross rails has an inner surface disposed
substantially transverse to the plane defined by said sheet of
paper material and has a T-shaped slot formed therein opening to
the inner surface. Each of said side rails has an upper surface
disposed substantially parallel to the plane defined by said sheet
of paper material and has a T-shaped slot formed therein opening to
the upper surface. Each T-shaped slot defines a downwardly
extending axis disposed at an acute angle with respect to the plane
defined by the sheet of paper material. A plurality of corner
pieces rigidly interconnect the rails together. Each corner piece
includes fasteners extending into the T-shaped slots of adjacent
side and cross rails. The T-shaped slots are formed along the
entire length of the side rails and along the entire length of the
cross rails. Each cross rail includes a ledge formed in the inner
surface. Each corner piece has a lip projecting therefrom that
engages the ledge. The ledge is formed along the entire length of
each cross rail.
[0013] In accordance with a further aspect of the present
invention, a frame member for a lower blanking tool frame assembly
of a carton die cutting machine is provided. The frame member
includes an outer frame for supporting a sheet of die cut paper
material during a blanking operation. The sheet of paper material
defines a substantially horizontal plane. An inner grid is
supported by the outer frame. The inner grid is defined by a
plurality of bars having first and second sides. The first side of
each bar including a longitudinally extending notch.
[0014] The outer frame includes an elongated rail having an upper
surface, a lower surface, an outer surface and an inner surface.
The rail has a bolt-receiving T-shaped slot formed therein opening
to the inner surface and defining a downwardly extending axis
disposed at an acute angle with respect to said inner surface. The
angle is between about 30.degree. to about 80.degree., and
preferably, about 65.degree.. The inner surface of said rail
further includes a ledge formed therein. The plurality of bars
includes a plurality of generally parallel lengthwise bars and a
plurality of generally parallel crosswise bars generally
perpendicular to the lengthwise bars.
[0015] In accordance with a still further aspect of the present
invention, a frame assembly for a lower blanking tool of a carton
die cutting machine is provided. The frame assembly includes an
outer frame for supporting a sheet of die cut paper material during
a blanking operation. The sheet of paper material defines a
substantially horizontal plane. The outer frame includes a pair of
opposite, spaced apart longitudinally extending side rails and a
pair of opposite, spaced apart cross rails extending crosswise
between said side rails. A plurality of generally parallel,
lengthwise bars extends axially between the side rails and has
first and second longitudinally extending sides. The first sides of
the lengthwise bars include longitudinally extending slots therein.
A plurality of generally parallel crosswise bars extends axially
between the cross rails and has first and second longitudinally
extending sides. The first sides of the crosswise bars rails
include longitudinally extending slots therein.
[0016] The outer frame includes an elongated rail having an upper
surface, a lower surface, an outer surface and an inner surface.
The rails having a bolt-receiving T-shaped slot formed therein
opening to the inner surface and defining a downwardly extending
axis disposed at an acute angle with respect to said inner surface.
The angle is between about 30.degree. to about 80.degree., and
preferably, about 65.degree.. The inner surface of the rail further
includes a ledge formed therein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings furnished herewith illustrate a preferred
construction of the present invention in which the above advantages
and features are clearly disclosed as well as others which will be
readily understood from the following description of the
illustrated embodiment.
[0018] In the drawings:
[0019] FIG. 1 is an isometric view of a lower frame assembly for a
blanking tool of a carton die cutting machine;
[0020] FIG. 2 is a top plan view of the lower frame assembly of
FIG. 1;
[0021] FIG. 3 is an enlarged, isometric view of a corner of the
lower frame assembly of FIG. 1;
[0022] FIG. 4 is an enlarged, isometric view illustrating a clamp
device in accordance with the present invention for attaching a bar
of the inner grid to the outer frame of the lower frame assembly of
FIG. 1;
[0023] FIG. 5 is a top plan of the clamp device in accordance with
the present invention for attaching a bar of the inner grid to the
outer frame of the lower frame assembly of FIG. 1;
[0024] FIG. 6 is a cross-sectional view of the clamp device of the
present invention taken along line 6-6 of FIG. 5;
[0025] FIG. 7 is a cross-sectional view of the clamp device of the
present invention taken along line 7-7 of FIG. 5;
[0026] FIG. 8 is an enlarged, isometric view illustrating a jogger
mounting to the outer frame of the lower frame assembly of FIG.
1;
[0027] FIG. 9 is a top plan view of the jogger mounted to the outer
frame of the lower frame assembly of FIG. 8;
[0028] FIG. 10 is an exploded, isometric view of the jogger of FIG.
8;
[0029] FIG. 11 is a cross-sectional view of the jogger mounted to
the outer frame of the lower frame assembly taken along line 11-11
of FIG. 9;
[0030] FIG. 12 is a cross-sectional view of the jogger mounted to
the outer frame of the lower frame assembly taken along line 12-12
of FIG. 9;
[0031] FIG. 13 is an enlarged, isometric view illustrating a
stiffening rail support mounted to the outer frame of the lower
frame assembly of FIG. 1;
[0032] FIG. 14 is a front, elevational view of the stiffening rail
support of FIG. 13;
[0033] FIG. 15 is a cross-sectional view of the stiffening rail
support mounted to the outer frame of the lower frame assembly
taken along line 13-13 of FIG. 11;
[0034] FIG. 16 is an enlarged, isometric view illustrating a
stiffening rail clamp mounted to the outer frame of the lower frame
of FIG. 1;
[0035] FIG. 17 is an isometric view of the stiffening rail clamp of
FIG. 13;
[0036] FIG. 18 is an exploded, isometric view of the stiffening
rail clamp of FIG. 13;
[0037] FIG. 19 is a cross-sectional view of the stiffening rail
clamp mounted to the outer frame of the lower frame assembly taken
along line 19-19 of FIG. 16;
[0038] FIG. 20 is an enlarged, isometric view illustrating a bar
support mounted to the outer frame of the lower frame of FIG.
1;
[0039] FIG. 21 is a partially exploded, isometric view of the bar
support of FIG. 20 and associated bar;
[0040] FIG. 22 is a partially exploded, isometric view of the bar
support mounted to the outer frame of the lower frame of FIG. 1 and
an associated bar;
[0041] FIG. 23 is a cross-sectional view of the bar support mounted
to the outer frame of the lower frame assembly taken along line
23-23 of FIG. 20; and
[0042] FIG. 24 is a cross-sectional view of the bar support mounted
to the outer frame of the lower frame assembly taken along line
24-24 of FIG. 20.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0043] Referring to FIG. 1, a lower frame assembly for a blanking
tool of a carton die cutting machine is generally designated by the
numeral 10. As is known, a die cutting machine converts or
processes a sheet of paper material into a carton blank. These
machines are well known in the art and are used to cut one or
several blanks into each sheet of paper material which, after
folding and gluing, may be formed into cartons or boxes. As is
conventional, the sheets of paper material move in a substantially
horizontal plane within the machine and are carried through various
sequences of printing, cutting, embossing, creasing, waste
stripping and/or blanking stations.
[0044] The die cutting machine usually is formed by a series of
stations with the first station being a starting position or input
station in which the sheets, which may be preprinted if desired,
are taken one by one from the top of a stack to a feed table where
they are placed in position against frontal and side guides. The
sheet can then be grasped by a gripper bar and lead downstream or
in the machine direction into subsequent processing stations.
Typically, the sheet is first conveyed into a cutting station where
the carton or box blanks of a desired size and profile are die cut
into the sheet. These blanks are held to the sheet by knicks which
are arranged along the cut edges of the blanks. This cutting
station is usually comprised of upper and lower tools, one of which
is provided with a plurality of line-shaped straight and curved die
cutting blades. If desired, the cutting station may be proceeded by
a printing station, or as noted above, the sheets may be
preprinted. After cutting, the sheet is then lead to a stripping
station where the waste, i.e., the unused scrap between the various
blanks, is grasped by upper and lower pins in order to be lead
downward into a waste container. The sheet is then fed to a
blanking station where the sheet is positioned horizontally over a
lower frame for support. The lower frame includes an inner grid
having large openings that correspond in size, in shape and in
position to the profile of the blank previously cut. An upper
blanking tool having one or more presser assemblies mounted thereto
then moves vertically downwardly in the die cutting machine to
secure the scrap portions against the grid and frame and then, as
the tool continues to move downwardly, the fasten points or knicks
between the blanks and the sheet are broken by pushers so that each
of the blanks are released, pushed through the grid and falls below
the frame where the blanks are stacked for further processing.
Finally, the residual or remaining portion of the sheet is carried
to a delivery or exit station where it is released by the gripper
bar as waste material.
[0045] Referring back to FIG. 1, lower frame assembly 10 includes
an outer frame comprised of a pair of opposite, spaced apart
longitudinally extending side frame members or side rails 12 and
14, and a pair of opposite, spaced apart cross frame members or
cross rails 16 and 18 extending crosswise between side rails 12 and
14. Arrow 20 illustrates the machine direction, i.e. the direction
of movement of a sheet of paper material (not shown) within the die
cutting machine. Thus, as illustrated in FIG. 1, side rail 12 may
be considered the left side rail while side rail 14 may be
considered the right side rail. Likewise, cross rail 16 may be
considered the front or leading cross rail, while cross rail 18 may
be considered the rear or trailing cross rail. As illustrated,
cross rails 16 and 18 are of sufficient length such that the
opposite ends of cross rails 16 and 18 overlap corresponding
opposite ends of side rails 12 and 14. In addition, it is
contemplated that cross rails 16 and 18 be disposed on top of side
rails 12 and 14 so that the lower surface of cross rails 16 and 18
abut against the upper surfaces of side rails 12 and 14.
[0046] As best seen in FIGS. 1 and 3, side rail 12 is rigidly
interconnected to cross rails 16 and 18 by a pair of corner pieces
22 and 24, respectively. Similarly, side rail 14 is rigidly
interconnected to cross rails 16 and 18 by corner pieces 24 and 22,
respectively. Corner pieces 22 are hereinafter referred to as right
corner pieces while corner pieces 24 are hereinafter referred to as
left corner pieces. The terms "right" and "left" refer to the
location of a tenon on the underside of each corner piece. It can
be appreciated that left corner pieces 24 are essentially mirror
images of right corner pieces 22. Corner pieces 22 and 24 are used
to rigidly interconnect rails 12, 14, 16 and 18 to one another so
as to retain rails 12, 14, 16 and 18 together in a "square" or
90.degree. relationship.
[0047] Side rails 12 and 14 are identical in structure, and as
such, the description hereinafter of side rail 12 is understood to
described side rail 14 as if fully described herein. In addition,
side rails 16 and 18 are identical in structure, and as such, the
description hereinafter of side rail 16 is understood to described
side rail 18 as if fully described herein. Side rail 12 extends
along a longitudinal axis and includes upper surface 26 lying in a
plane. Upper surface 26 of side rail 12 includes t-shaped slot 28
therein that extends along the entire length thereof. As best seen
in FIG. 19, slot 28 extends along an axis 30 disposed at an acute
angle 32 to upper surface 26 of side rail 12. It is contemplated
that angle 32 fall within the range of 1.degree. and 89.degree.,
but is preferably between about 30.degree. to about 80.degree. and
is most preferably about 65.degree.. Slot 28 has a terminal end
located within side rail 12 and has an open end that opens to upper
surface 26 of side rail 12.
[0048] Side rail 12 further includes second t-shaped slot 34 formed
along the entire length of inner surface 36 of side rail 12. Inner
surface 36 of side rail 12 lies in plane that is generally
perpendicular to upper surface 26 of side rail 12. Slot 34 extends
along an axis 38 disposed at an acute angle 40 with respect to
inner surface 36. Angle 40 may be any angle between about 1.degree.
to about 89.degree., but is preferably between about 30.degree. to
about 80.degree. and is most preferably about 65.degree.. Slot 34
is identical in structure to slot 28 and 25 extends along the
entire length of side rail 12. As illustrated, slot 34 has a
terminal end located within side rail 12 and an open end which
opens to inner surface 36 of side rail 12. The terminal end of slot
34 (as well as the terminal end of slot 28) is configured to
conform to the shape of nuts 42 captured therein, for reasons
hereinafter described.
[0049] Side rail 12 further includes a channel-shaped recess 44
formed in upper surface 26 thereof. Recess 44 is formed in upper
surface 26 between slot 28 and the intersection of upper surface 26
and inner surface 36 and functions to receive a ruler or other
measuring device to aid in building an inner grid 46 within rails
12, 14, 16 and 18, as hereinafter described. Recess 44 is formed
along the entire length of upper surface 26 of side rail 12 and
opens to both of the opposite ends thereof.
[0050] Side rail 12 also includes an angled groove 48 formed in
inner surface 36 above slot 34. Groove 48 is formed along the
entire length of inner surface 36 of side rail 12 and opens to both
of the opposite ends thereof. As illustrated, groove 48 is defined
by inwardly projecting ledge 50 and angled surface 52. Ledge 50 has
a planar surface and is disposed at an angle of about 90.degree.
with respect to inner surface 36. Other acute angles for ledge 40
may be used, but 90.degree. is preferred. Angled surface 52 forms
an acute angle with ledge 50 that falls in the range of
approximately about 30.degree. to about 80.degree., but is
preferably about 70.degree.. Groove 48 functions to receive a tenon
of corresponding corner pieces 22 and 24.
[0051] Referring now to FIGS. 3-4, 7-8 and 12, cross rail 16
includes an upper surface 54, an opposite lower surface 56, an
outer surface 58, and an opposite inner surface 60. Inner surface
60 is generally planer and faces the interior of frame assembly 10.
Cross rail 16 includes a t-shaped slot 62 formed therein. Slot 62
extends along the entire length of inner surface 60 of cross rail
16 and opens to both of the opposite ends of cross rail 16. Slot 62
has a terminal end located within the interior of cross rail 16 and
has an open end that opens to inner surface 60 of side rail 60. The
terminal end of slot 62 is configured to conform to the shape of
nuts 72 captured therein, for reasons hereinafter described. Slot
62 defines a downwardly extending axis 64 disposed at an acute
angle 66 with respect to inner surface 60 of cross rail 16. It is
contemplated that angle 66 fall in the range of 1.degree. and
89.degree., but is preferably an angle of about 30.degree. to about
80.degree., and is most preferably about 65.degree..
[0052] Cross rail 16 also includes an inwardly projecting ledge 68
formed in inner surface 60. Ledge 68 is planar in shape and is
disposed at an angle of 90.degree. with respect to inner surface
60. However, ledge 68 could also be modified to be at an acute
angle with respect to inner surface 60 if desired. As shown, ledge
68 is located at the intersection of the upper surface 54 and inner
surface 60 of cross rail 16 such that ledge 68 is located between
upper surface 54 and t-shaped slot 62. Ledge 68 extends along the
entire length of cross rail 16 and opens to both of the opposite
ends of cross rail 16 in a manner similar to slot 62. Cross rail 16
further includes a channel-shaped recess 70 formed in upper surface
54. Recess 70 is formed in and extends along the entire length of
cross rail 16 and opens to both of the opposite ends of cross rail
16. Recess 70 is typically utilized to receive a ruler or other
measuring device that aids in the proper placement of inner grid
46.
[0053] Referring back to FIG. 3, corner piece 22 interconnects side
rail 12 and front cross rail 16 of the lower frame assembly 10, and
includes an L-shaped body having a horizontal plate member 74 and
an upright or vertical plate member 76. Horizontal plate member 74
defines a substantially flat upper face, a substantially flat
opposite lower face, an inside face, an opposite outside face and
an end face. As illustrated, each of these faces are substantially
planar in shape. Upright or vertical plate member 76 also defines a
substantially flat inner face contiguous with the upper face of
plate member 74, a substantially flat outer face contiguous with
the lower face of plate member 74, an inside face contiguous with
the inside face of horizontal plate member 74, an opposite outside
face contiguous with the outside face of horizontal plate member
74, and a top face. Horizontal plate member 74 has a pair of
adjacent, aligned outwardly and downwardly extending bolt receiving
bores formed therethrough extending between its upper face and
lower face. Each bore defines an axis disposed at an acute angle
with respect to the upper face of horizontal plate member 74. It is
preferred that the acute angle fall in the range of 1.degree. and
89.degree., but preferably between about 30.degree. and about
80.degree., and is most preferably about 65.degree.. Bolts 78 and
80 extend through bores in horizontal plate member 74 into slot 28
in upper surface 26 of side rail 12. Nuts are provided within the
terminal end of the slot 28 in upper surface 26 of side rail 12 and
threaded onto the shafts of bolts 78 and 80 so as to rigidly
connect corner piece 22 to side rail 12.
[0054] Upright or vertical plate member 76 of corner piece 22 also
includes a pair of adjacent, aligned outwardly and downwardly
extending bolt receiving bores formed therethrough from its inner
face to its outer face through which bolts 84 extend into slot 62
in inner surface 60 of cross rail 16. Each bore defines an axis
disposed at an acute angle with respect to the inner face of
vertical plate member 76. Again, this acute angle may be anywhere
between 1.degree. and 89.degree., but is preferably between about
30.degree. and about 80.degree., and is most preferably about
65.degree. to match angle 66 of slot 62. Nuts are provided within
the terminal end of the slot 62 in inner surface 60 of cross rail
16 and threaded onto the shafts of bolts 84 so as to rigidly
connect corner piece 22 to cross rail 16.
[0055] Vertical plate member 76 has a lip 86 projecting outwardly
therefrom. Lip 86 has an upper surface and a lower surface. The
upper surface of lip 86 is contiguous with the top face of vertical
plate member 76 while its lower surface is contiguous with the
outer face of vertical plate member 76. Lip 86 is disposed
substantially 90.degree. with respect to the outer face of vertical
plate member 76, and lip 86 extends completely across the outer
face of vertical plate member 76. Although illustrated as being
contiguous with the top face of vertical plate member 76, lip 86
could also be spaced slightly downwardly therefrom if desired.
Also, lip 86 need not necessarily extend completely across the
outer face of vertical plate member 76, but preferably does so to
provide the maximum amount of clamping force against ledge 68.
[0056] Corner piece 22 also includes a tenon 88 projecting
downwardly from horizontal plate member 74. Tenon 88 has an angled
surface disposed at an acute angle with respect to the lower face
of plate member 74. This acute angle may be any angle between
1.degree. and 89.degree., but preferably matches the angle formed
by angled surface 50 of groove 48 in side rail 12. Again, by
matching the angle of angled surface 50, the maximum amount of
friction is provided between tenon 88 of corner piece 22 and angled
surface 50 to provide the maximum amount of clamping force.
[0057] It can be appreciated that a right corner piece 22 may be
used to interconnect side rail 14 and cross rail 18 in the same
manner as heretofore described with respect to side rail 12 and
cross rail 16. In addition, as heretofore described, left corner
pieces 24 are mirror images of right corner pieces 22. As such, the
description heretofore provided for interconnecting side rail 12
and cross rail 16 with corner piece 22 may be understood to
describe the connection of side rail 12 and cross rail 18 with
corner piece 24 and the connection of side rail 14 and cross rail
16 with corner piece 24, as if fully described herein.
[0058] In order to increase the overall strength and stability of
lower frame assembly 10, it is contemplated to interconnect
stiffening rails 92 to corresponding side rails 12 and 14,
respectively, utilizing a plurality of stiffening rail supports 96.
It can appreciated that one of the stiffening rails 92 is
interconnected to side rail 14 in the same matter as the other of
the stiffening rails 92 is interconnected to side rail 12, and as
such, the following description of the interconnection of a
stiffening rail 92 to side rail 12 is understood to describe the
interconnection of stiffening rail 92 to side rail 14 as if fully
described hereinafter.
[0059] Referring to FIGS. 1 and 13-15, stiffening rails 92 have a
generally t-shaped cross-section and a length substantially the
same as the length of side rails 12 and 14. Each stiffening rail
includes a horizontal leg 99 and a vertical leg 100 disposed at
90.degree. to one another. Stiffening rails 92 may be composed of
any suitable material, but is preferably steel having sufficient
strength to discourage flexing of side rails 12 and 14. Vertical
legs 100 of stiffening rails 92 have a longitudinally extending
v-shaped grooves 102 formed in one side thereof. The opposite sides
of vertical legs 100 define planar faces which bear or abut against
the outer faces 104 of clamp pieces 101 of stiffening rail supports
96, as illustrated. Stiffening rail supports 96 include v-shaped
cuts 106 formed horizontally across outer faces 104.
[0060] Stiffening rail supports 96 further include c-shaped jaws
108 having a pair of opposite parallel legs 110 and 112, with legs
112 being slightly longer than legs 110. The terminal ends of legs
110 and 112 are rounded for engagement with corresponding v-shaped
grooves 102 and v-shaped cuts 106, respectively. In order to
interconnect a stiffening rail 92 to stiffening rail supports 96,
screws 116 extend through corresponding walls 118 of c-shapedjaws
108 into bores in clamp pieces 101. Thus, as screws 116 are turned
down in a clockwise direction, c-shaped jaws 108 are moved toward
corresponding clamp pieces 101 so that legs 110 engage
corresponding v-shaped groove 102 and legs 112 engage corresponding
v-shaped cuts 106 until stiffening rail 92 is rigidly retained in
position.
[0061] Clamp pieces 101 of stiffening rail supports 96 further
include downwardly extending bolt-receiving bores 120 therethough
for receiving corresponding bolts 122. Bolts 122 extend into slot
34 in inner surface 36 of side rail 12. Each bore 120 defines an
axis 124 disposed at an acute angle 126 with respect to outer face
104 of a corresponding clamp piece 101. Acute angle 126 may be
anywhere between 1.degree. and 89.degree., but is preferably
between about 30.degree. and about 80.degree., and is most
preferably about 65.degree. to match angle 40 of slot 34. Nuts are
provided within the terminal end of the slot 34 in inner surface 36
of side rail 12 and threaded onto the shafts of bolts 122 so as to
rigidly connect clamp pieces 101, and hence, stiffening rail
supports 96 to side rail 12. In the assembled configuration,
stiffening rails 92 stiffen side rails 12 and 14 to prevent any
significant flexing thereof during a blanking operation.
[0062] In addition to outer face 104, each clamp piece 101 of
stiffening rail support 96 is defined by flat vertically extending
inner face 103, a horizontally extending upper face 105, an
opposite horizontally extending lower face 107, and a pair of
opposite end faces 109 and 111. Each clamp piece 101 also defines
slot 113 that extends along the entire height of clamp piece 101
and opens to both upper face 105 and 107. Slot 113 is defined by a
vertical rear surface 115 and first and second sidewalls 117 and
119, respectively. Sidewalls 117 and 119 extend from inner face 103
and diverge from each other.
[0063] Jogging element 121 is slidably received within slot 113.
Jogging element 121 includes an upright plate member defining
substantially flat, vertically extending inner face 123, a
substantially flat oppositely vertically extending outer face 125,
a horizontally extending upper face 127, an opposite horizontally
extending lower face 129, and a pair of opposite end faces 131 and
133. End faces 131 and 133 diverge from each other as the end faces
extend from inner face 123 to outer face 125. As described, end
face 131 of jogging element 121 forms a slidable interface with
sidewall 117, end face 133 of jogging element 121 forms a slidable
interface with sidewall 119, and outer face 125 of jogging element
121 forms a slidable interface with rear wall 115.
[0064] Jogging element 121 further includes wall 135 defining a
generally oblong opening 137 to accommodate the portion of head
122a of bolt 122 that projects into slot 113. With jogging element
121 positioned within slot 113, jogging element 121 is slidable
between a first raised position wherein lower face 129 of jogging
element 121 is substantially flush with the lower face 107 of clamp
piece 101 and wherein head 112a of bolt 122 engages lower portion
135a of wall 135 and a lowered position wherein lower face 107 of
jogging element 121 is below lower face 107 of the upright plate
member and bolt head 122a engages upper portion 135b of wall 135.
Jogging element 121 provides an adjustable stop for a sheet being
positioned horizontally over lower frame assembly 10.
[0065] Referring to FIG. 1, lower frame assembly 10 further
includes inner grid 46 composed of a plurality of parallel
lengthwise bars 130 extending in machine direction 20 between front
cross rail 16 and rear cross rail 18, and a plurality of
substantially parallel crosswise bars 132 extending transverse to
machine direction 20 between left side rail 12 and right side rail
14. Bars 130 and 132 of inner grid 46 can be point welded or glued
with adhesive at the points where they intersect to insure rigidity
of inner grid 46. As hereinafter described, the opposite ends of
bars 130 are attached to cross rails 16 and 18 by corresponding
clamp devices 136. Likewise, the opposite ends of bars 132 are
attached to side rails 12 and 14 by corresponding clamp devices
138. It should be noted that the present invention is not limited
to the design of inner grid 46 illustrated in FIG. 1 and that the
design provided is for illustrative purposes only. It can be
appreciated that the profile of inner grid 46 may be changed
depending upon the type, size and shape of the carton blank to be
produced.
[0066] Referring to FIGS. 4-7, each clamp device 136 includes an
upright plate member defining a substantially flat vertically
extending inner face 140, a substantially flat opposite vertically
extending outer face 142, a horizontally extending upper face 144,
an opposite horizontally extending lower face 146, and a pair of
opposite end faces 148 and 150. As described, clamp device 136 is
generally rectangular in shape, although other geometric shapes are
contemplated without deviating from the scope of the present
invention.
[0067] Lip 152 is formed on outer face 142 of each clamp device
136. Lips 152 project at right angles to outer faces 142 and extend
completely across outer faces 142 between end faces 148 and 150 of
clamp devices 136. Lips 152 do not necessarily extend completely
across outer faces 142 of clamp devices 136, but preferably do so
to provide the maximum amount of clamping force against ledges 68
formed in inner surfaces 60 of cross rails 16 and 18.
[0068] A substantially u-shaped upper cavity 156 is formed in upper
face 144 of each clamp device 136. Cavity 156 is defined by spaced
sidewalls 158 and 160 and bottom wall 162. Sidewalls 158 and 160
extend vertically in planes parallel to end faces 148 and 150 and
are disposed at a 90.degree. angle with respect to inner face 140.
Bottom wall 162 of each cavity 156 includes depression 164 therein
that extends along an axis perpendicular to inner face 140 for
receiving the lower edge 130a of bar 130 and for aiding in the
alignment of bars 130, as hereinafter described. Cavity 156
includes a tear-dropped shaped portion 165 at the intersection of
sidewall 160 and bottom wall 162.
[0069] Wedge members 166 are disposed within cavities 156 of clamp
devices 136 for pivotable movement between a clamped position
wherein clamping surfaces 168 of wedge members 166 engage and
retain corresponding bars 130 in a user desired position and a
released position wherein bars 130 may be removed from cavity 156.
As illustrated, each wedge member 166 has upper and lower faces 170
and 172, respectively, spaced by clamping surface 168 and sides 174
and 176. Each clamping surface 168 is generally arcuate having an
apex for engaging a corresponding bar 130. Each wedge member 166
also includes pivoting element 178 having a tear-drop shaped cross
section that is pivotably receivable within portion 165 of a
corresponding cavity 156. Each pivoting element 178 of wedge
members 166 extends from and is contiguous with upper and lower
faces 170 and 172, respectively, and sides 174 and 176. Threaded
apertures 180 extend through wedge members 166 between the upper
and lower faces 170 and 172, respectively, thereof. Bolts 182
extend though corresponding apertures 180 in wedge members 166 and
into corresponding bores 184 formed in bottom walls 162 of clamp
devices 136 so as to interconnect wedge members 166 and
corresponding clamp devices 136.
[0070] It can be appreciated that as bolts 182 are turned down in a
clockwise direction, wedge members 166 pivot on pivoting elements
178 toward their clamped positions. Clamping surfaces 168 of wedge
members 166 function to engage bars 130 provided in depressions 164
to exert the necessary clamping force to retain bars 130 in
position between sidewalls 158 and clamping surfaces 168 of wedge
members 166 as wedge members 166 pivot downwardly into cavities
156. To release bars 130, bolts 182 are turned in a
counterclockwise direction until wedge members 166 pivot away from
corresponding bars 130 to release the clamping pressure applied
thereto so that bars 130 can be removed from cavities 156.
[0071] In order to attach clamp devices 136 to cross rails 16 and
18, rectangular recesses 190 are formed in inner faces 140 to
define inner walls 192. Downwardly and outwardly extending
bolt-receiving bores 194 extend through inner walls 192. Each bore
194 extends along axis disposed at an acute angle with respect to
outer face 142. The acute angle may be anywhere between 1.degree.
and 89.degree., but is preferably between about 30.degree. and
about 80.degree., and is most preferably about 65.degree. to match
the angle 66 defined by slot 62 in a corresponding cross rail 16 or
18. Bolts 198 extend through corresponding bores 194 into nuts (not
shown) captured within slots 62. As bolts 198 are tightened, lips
152 are pulled tightly against corresponding ledges 68 of cross
rails 16 and 18 while at the same time outer faces 142 are forced
to bear tightly against corresponding inner faces 60 of cross rails
16 and 18 to rigidly hold clamp devices 136 in position on cross
rails 16 and 18.
[0072] Referring to FIGS. 16-19, it can be appreciated that clamp
devices 138 perform the dual function of interconnecting stiffening
rails 92 to corresponding side rails 12 and 14, as well as,
interconnecting the ends of bars 132 to side rails 12 and 14. Each
clamp device 138 includes an upright plate member that defines
substantially flat, vertically extending inner face 200, a
substantially flat opposite vertically extending outer face 202, a
horizontally extending upper face 204, an opposite horizontally
extending lower face 206, and a pair of opposite end faces 208 and
210. As described, clamp device 138 is generally rectangular in
shape, although other geometric shapes are contemplated depending
upon the end use of clamp device 138.
[0073] Each clamp device 138 further includes a c-shaped jaw 212
having a pair of oppositely parallel legs 214 and 216, with a leg
216 being slightly longer than leg 214. The terminal ends of legs
214 and 216 are rounded for engagement with corresponding v-shaped
grooves 102 formed in vertical legs 100 of stiffening rail 92 and
v-shaped cuts 218 formed horizontally across outer faces 202 of
clamp devices 138. In order to interconnect a stiffening rail 92 to
clamp devices 138, screws 220 extend through corresponding walls
222 of c-shaped jaws 212 into bores 224 formed in outer faces 202
of clamp devices 138. As screws 220 are turned down in a clockwise
direction, c-shaped jaws 212 are moved toward corresponding outer
faces 202 of clamp devices 138 so that legs 214 engage
corresponding v-shaped groove 102 in vertical leg 100 of stiffening
rail 92 and legs 216 engage corresponding v-shaped cuts 218 until
stiffening rail 92 is rigidly retained in position.
[0074] Lip 226 is formed on outer face 202 of each clamp device
138. Lips 226 project at right angles to outer faces 202 and extend
completely across outer faces 202 between end faces 208 and 210 of
clamp devices 138. Lips 226 do not necessarily extend completely
across outer faces 202 of clamp devices 138, but preferably do so
as to provide the maximum amount of clamping force against ledges
50 in side rails 12 and 14.
[0075] A substantially u-shaped upper cavity 228 is formed in upper
face 204 of each clamp device 138. Cavity 228 is defined by spaced
sidewalls 230 and 232 and bottom wall 234. Sidewalls 230 and 232
extend vertically in parallel planes and are disposed at right
angles to inner face 200. Bottom wall 234 of each cavity 238
includes depression 236 therein that extends along an axis
perpendicular to inner face 200 for receiving the lower edge 132a
of bar 132 and for aiding the alignment of bars 132. Each cavity
228 includes a portion 238 having a tear-drop shaped cross section
at the intersection of sidewall 232 and bottom wall 234.
[0076] Wedge members 240 are disposed within cavities 228 of clamp
devices 138 for pivotable movement between a clamped position
wherein clamping surfaces 242 of wedge members 240 engage and
retain corresponding bars 132 in a user desired position and a
released position wherein bars 132 may be removed from cavity 228.
As illustrated, each wedge member 240 has upper and lower faces 244
and 246, respectively, spaced by clamping surface 242 and sides 248
and 250. Each clamping surface 242 is generally arcuate having an
apex for engaging a corresponding bar 132. Each wedge member 240
also includes pivoting element 252 having a tear drop shaped cross
section that is pivotably receivable within portion 238 of a
corresponding cavity 228. Each pivoting element 252 of wedge
members 240 extends from and continuous with upper and lower faces
244 and 246, respectively, and sides 248 and 250. Threaded
apertures 254 extending through wedge members 240 between upper and
lower faces 244 and 246, respectively, thereof. Bolts 256 extend
through corresponding apertures 254 and wedge members 240 and into
corresponding bores 258 formed in bottom walls 234 of clamp devices
138 so as to interconnect wedge members 240 and corresponding clamp
devices 138.
[0077] It can be appreciated that as bolts 256 are turned down in a
clockwise direction, wedge members 240 pivot on pivoting elements
252 toward their clamped positions. Clamping surfaces 242 of wedge
members 240 function to engage bars 132 provided in depressions 234
to exert the necessary clamping force to retain bars 132 in
position between sidewalls 204 and clamping surfaces 242 of wedge
members 240 as wedge members 240 pivot downwardly into cavities
228. To release bars 132, bolts 256 are turned in a
counterclockwise direction until wedge members 240 pivot away from
corresponding bars 132 to release the clamping pressure applied
thereto so that bars 132 can be removed from cavities 228.
[0078] In order to attach clamp devices 138 to side rails 12 and
14, rectangular recesses 260 are formed in inner faces 200 that
define inner walls 262. Downwardly and outwardly extending
bolt-receiving bores 264 extend through inner walls 262. Each bore
264 extends along an axis disposed on an acuate angle with respect
to outer face 202 of a corresponding clamp device 138. The acuate
angle may be anywhere between 1.degree. and 89.degree., but is
preferably between about 30.degree. and about 80.degree., and is
most preferably about 65.degree. to match the angle 40 defined by
slot 34 in a corresponding side rail 12 or 14. Bolts 266 extend
through corresponding bores 264 into nuts (not shown) captured
within slots 34. As bolts 266 are tightened, lips 226 are pulled
tightly against corresponding ledges 50 of side rails 12 and 14
while at the same time outer faces 202 are forced to bear tightly
against corresponding inner faces 36 of side rails 12 and 14 to
rigidly hold clamp devices 138 in position on side rails 12 and
14.
[0079] Referring to FIGS. 20-24, an alternate clamp device is
generally designed by the reference numeral 270. As hereinafter
described, clamp device 270 may be used to attach the opposite ends
of an alternate bar 272 to cross rails 16 or 18. Bar 272 takes the
form of generally flat panel having first and second sides 274 and
276, first and second edges 278 and 280, respectively, and end 282.
A generally cylindrical mounting pin 284 projects from end 282 of
bar 272, for reasons hereinafter described.
[0080] Clamp device 270 includes an upright plate member defining a
substantially flat, vertically extending inner face 284, a
substantially flat opposite vertically extending outer face 286, a
horizontally extending upper face 288, an opposite horizontally
extending lower face 290, and a pair of opposite end faces 292 and
293. As described, clamp device 270 is generally rectangular in
shape although other geometric shapes are contemplated about
deviating from the scope of the present invention.
[0081] Lip 294 is formed on outer face 286 of clamp device 270. Lip
294 projects at a right angle to outer face 286 and extends
completely across outer face 286 between end faces 292 and 293 of
clamp device 270. Lip 294 does not necessarily extend completely
across outer face 286 of clamp device 270, but preferably does so
as to provide the maximum amount of clamping force against ledge 68
formed in inner surface 60 of cross rail 16.
[0082] Panel receiving slot 296 that extends along the entire
height of clamp device 270 and opens to both upper face 288 and
lower face 290. Slot 296 includes a first inner portion 296a
defined by sidewalls 298a and 300a, and an outer portion 296b
defined by sidewalls 298b and 300b. Outer portion slot 296 is
further defined by a lower horizontal support surface 301 that is
generally parallel to and positioned between upper and lower faces
288 and 290, respectively, of clamp device 270. As described,
sidewalls 298a and 300a are spaced of sufficient dimension to allow
end 282 of bar 272 to be inserted therebetween. Similarly,
sidewalls 298b and 300b are spaced of sufficient dimension to allow
pin 284 to be inserted therebetween. The intersection of sidewalls
298a and 298b define a shoulder 302 within slot 296 and the
intersection of sidewalls 300a and 300b define shoulder 304 within
slot 296. End 282 of bar 272 engages shoulders 302 and 304 when end
282 of bar 272 is fully inserted into slot 296 in clamp device 270.
With end 282 of bar 272 fully inserted within slot 296 in clamp
device 270, pin 284 is received within outer portion 296b of slot
296. It can be appreciated that pin 284 may be rested on support
surface 301 to allow support surface 301 to vertically support bar
272.
[0083] In order to maintain bar 272 within slot 296 in clamp device
270, a set screw 306 extends through bore 308 formed in end face
292 of clamp device 270. Bore 302 communicates with inner portion
296a of slot 296. It can be appreciated that as set screw 306 is
turned in a clockwise direction, the terminal end 306a of set screw
306 engages side 274 of bar 272 to exert the necessary clamping
force to retain bar 272 in position within slot 296. To release bar
272, set screw 306 is turned in a counterclockwise direction until
terminal end 306a of set screw 306 disengages from side 274 of bar
272 to release the clamping pressure applied thereto so that bar
272 can be removed from slot 296.
[0084] In order to attach clamp device 270 to cross rail 16, a
downwardly and outwardly extending bolt receiving bore 307 extends
through clamp device 270 between inner face 284 and outer face 286.
Bore 298 extends along an axis disposed at an acute angle with
respect to outer face 286. The acute angle may be anywhere between
1.degree. and 89.degree., but preferably is between about
30.degree. and 80.degree., and is most preferably about 65.degree.
to match the angle 66 defined by slots 62 in cross rail 16. Bolt
310 extends through corresponding bore 307 into a nut (not shown)
captured within slot 62. As bolt 310 is tightened, lip 294 is
pulled tightly against corresponding ledge 68 of cross rail 16
while at the same time outer face 286 is force to bear tightly
against corresponding inner face 60 of cross rail 16 to rigidly
hold clamping device 270 in position across rail 16.
[0085] Referring to FIGS. 8-12, a jogger is generally designated by
the reference numeral 320. Jogger 320 is connectable to cross-rails
16 and 18 for aligning a sheet on inner grid 46 of lower frame
assembly 10. Jogger 320 includes an upright plate member defining a
substantially flat vertically extending inner face 322, a
substantially flat opposite vertically extending outer face 324, a
horizontally extending upper face 326, an opposite horizontally
extending lower face 328, and a pair of opposite end faces 330 and
332. As described, jogger 320 is generally rectangular in shape,
although other geometric shapes are contemplated without deviating
from the scope of the present invention.
[0086] Lip 334 is formed in outer face 324 ofjogger 320. Lip 334
projects at a right angle to outer face 324 and extends completely
across outer face 324 between end faces 330 and 332 ofjogger 320.
Lip 334 does not necessary extend completely across outer face 324
of jogger 320, but preferably does so as to provide the maximum
amount of clamping force against ledge 68 formed in the inner
surface 60 of cross rail 16. In addition, slot 336 extends along
the entire height of jogger 320 and opens to both upper face 326
and lower face 328. Slot 336 is defined by a vertical rear surface
338 and first and second sidewalls 340 and 342, respectively.
Sidewalls 340 and 342 extend from inner face 322 and diverge from
each other.
[0087] In order to attach jogger 320 to cross rail 16, a downwardly
and outwardly extending bolt receiving bore 344 extends through
jogger 320 between rear wall 338 and outer face 324. Bore 344
extends along an axis 346 disposed at an acute angle with respect
to outer face 324. The acute angle may be anywhere between
1.degree. and 89.degree., but preferably is between about
30.degree. and 80.degree., and is most preferably about 65.degree.
to match the angle 66 defined by slot 62 in cross rail 16. Bolt 348
extends through corresponding bore 344 into nut 350 captured within
slot 62. As bolt 348 is tightened, lip 334 is pulled tightly
against corresponding ledge 68 of cross rail 16 while at the same
time outer face 324 is forced to bear tightly against corresponding
inner face 60 of cross rail 16 to rigidly hold jogger 320 in
position against cross rail 16. With bolt 348 threaded in bore 344,
a portion of head 348a of bolt projects into slot 336.
[0088] Jogger 320 further includes jogging element 352 that is
slidably received within slot 336. Jogging element 352 includes an
upright plate member defining substantially flat, vertically
extending inner face 354, a substantially flat oppositely
vertically extending outer face 356, a horizontally extending upper
face 358, an opposite horizontally extending lower face 360, and a
pair of opposite end faces 362 and 364. End faces 362 and 364
diverge from each other as the end faces extend from inner face 354
to outer face 356. As described, end face 362 of jogging element
352 forms a slidable interface with sidewall 340, end face 364 of
jogging element 352 forms a slidable interface with sidewall 342,
and outer face 356 of jogging element 352 forms a slidable
interface with rear wall 338.
[0089] Jogging element 352 further includes wall 370 defining a
generally oblong opening 366 to accommodate the portion of head
348a of bolt 348 that projects into slot 336. With jogging element
352 positioned within slot 336, jogging element 352 is slidable
between a first raised position wherein lower face 360 of jogging
element 352 is substantially flush with the lower face 328 and
wherein head 348a of bolt 348 engages lower portion 370a of wall
370 and a lowered position wherein lower face 360 of jogging
element 352 is below lower face 328 of the upright plate member and
bolt head 348 engages upper portion 370b of wall 370. Jogging
element 352 provides an adjustable stop for a sheet being
positioned horizontally over lower frame assembly 10.
[0090] Various modes of carrying out the invention are contemplated
as being within the scope of the following claims particularly
pointing and distinctly claiming the subject matter which is
regarded as the invention.
* * * * *