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Патент USA US2114948

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April 19, 1938'.
' Filed May 21, 1937
7P2] .77 .Fea
Patented Apr. 19, 1938
Kari Wehner and Ralph Reay, Portland, Oreg.
Application my 21, 1937, Serial No. 144,107
4 Claims.
This invention relates to creasing rules em—
ployed in creasing cardboard stock in the manu
facture of boxes and cartons, being generally
associated with cutting rules, the creasing and
5 cutting rules being set up‘ as a. die in the chase
of a press so that the entire box or carton blank
is stamped out at one operation with the neces
sary cuts and creased lines of fold. ‘ ’
The cutting rules are ?at steel pieces of any
desired length, with one longitudinal edge sharp~
ened to form a knife edge. The creasing rules
are of exactly the same height as the cutting
rules, but are ?at on the edge corresponding to
the knife edge of the cutting rule, and of different
thickness depending upon the thickness of the
stock to be creased, since the same gauge of creas
ing rule will not make a proper crease in all thick
messes of stock.
The conventional cutting rule is invariably of 2
point thickness (a point
.01383'7 of an inch),
20 while the creasing rules usually are made of two
point, 4 point and 6 point thickness, the thickness
being uniform throughout the body of the rule.
It may be readily understood that a cutting rule
r and a 2 point creasing rule placed end to end
can be clamped tight in a chase between paral
lel blocks of uniform thickness, but that a cut
ting rule and either a 4 point or 6 point creas
ing rule so placed, cannot be clamped between
9 blocks of uniform thickness, but it is necessary
‘’ in order to have the cutting rule line with the
creasing rule to use either a 4 or 2 point lead as
the case may require, ‘or cardboard strips along
side the cutting rule to build it up to the thickness
of the creasing rule, or to cut the blocks of
smaller thickness where they must clamp against
the creasing rule.
(01. 93-58)
In the drawing which accompanies and forms
a part of the following speci?cation, and through
out the several ?gures of which the same char
acters of reference have been employed to desig
nate identical parts:
Figure l is a bottom plan view of a chase with
a die set up and clamped therein including cut
ting and creasing rules embodying the features
of the present invention;
Figure 2 is a section taken along the line 2—2 10
of Figure 1;
Figure 3 is a section taken along the line 3—3
of Figure 1;
Figures 4 and 5 are sections through creasing
rules of different thickness illustrating their 15
creasing operation upon different gauge stock;
Figure 6 is a perspective View through a por
tion of creasing rule constructed according to
the principles of the invention; and
Figure 7 is a perspective View showing a cutting
rule in end to end relation with a creasing rule,
illustrating uniformity in the thickness of those
portions of the rules which are to be clamped in
longitudinal alignment.
Referring now in detail to the several ?gures,
the numeral i represents in general a chase
comprising the rectangular metallic frame 2 hav
ing clamps 3 at one end and one side thereof,
the usual furniture consisting of Wooden blocks
A and 5, all of the same width and thickness, but
cut to suitable lengths to correspond to the lengths
of rule with which they are to be set up.
The numerals 6 and ‘I represent lengths of
creasing rule, which are set up in respective end
wise relation to shorter pieces of cutting rule 8
and 9. The arrangement of cutting and creas
ing rules as shown is adapted to out and crease
a blank for the bottom or top of a rectangular box
This causes considerable loss of time and lacks
accuracy and even accurately done, it may cause
having four sides de?ned by creased lines of
40 the die to spring when locked in the chase. Many
times the dies will bulge and break while being
used in the process of cutting. In nearly all such
cases, this means not only losing the die, but also
a broken cutting press which brings production
as a and b1, these like the other blocks, are of
to a standstill.
The present invention has for its object the
provision of a creasing rule having the base por
tion, that is, the portion which clamps between
the blocks of the die of the same thickness as the
cutting rule and the face portion of different de
sired t 'ilCkZlESS as, for example, 2 point, 4 point,
6 point, etc.
Other objects of the invention will appear as
the following description of a preferred and prac
55 tical embodiment thereof proceeds.
fold and with the corner portions cut away.
Referring to certain speci?c blocks designated
uniform width and thickness. Therefore if the
cutting rule 8 were of 2 point thickness and the
creasing rule 6 of 4 point thickness throughout, 45
it would be impossible to clamp both rules up
tightly between the blocks a and b for when the
blocks b‘ were in tight engagement with the 4
point creasing rule 6, the 2 point cutting rule 8
would be loose in the space between the blocks a. 50
This is the condition which attends the use of
cutting and creasing rules of the type at present
In order to make the cutting rule tight it is
necessary to ?ank it on both sides with pieces 55
of cardboard of suitable thickness or with pieces
of lead. As has been stated in connection with
the objects of the invention it is quite unusual
that the buliding up of the thickness of the cut
ting rule to that of the creasing rule can be done
with accuracy, the result being that when the die
is clamped up in the chase, the unequal pressure
in various parts of the die will cause the die
to bulge and break out from the chase in the act
of pressing which means not only losing the die,
but breaking the rule and the press.
Figure 1 however does not disclose the supposed
case where cutting and creasing rules with bases
of different thickness are used, but it illustrates
the present invention in which the bases of the
creasing rules are all of 2 point thickness, the
same as that of the cutting rule regardless of
whether the faces of the creasing rules are of 2
point, 6 point, or any other point thickness.
Figures 2 and 3 are comparative, showing that
the base portion 10 of the creasing rule is of the
same thickness as the cutting rule 9, but that
the face H of the creasing rule is of the desired
thickness, for example, 4 point, as shown. It is
quite evident that since the bases of both the cut
ting and creasing rules are of the same thickness
it is an easy matter to clamp them up in the chase
between the blocks of the die without having to
build up the thickness of the base of the cut
ting rule and without the necessity of cutting
thinner those blocks between which the creasing
rules are clamped.
It will be observed from the several ?gures
and particularly Figures 2 and 3 that the blocks 4
and 5 are of the same thickness and it is preferred
to make the base portion of the creasing rule of
a width equal substantially to the thickness of
the blocks so that when the creasing rule is
clamped between the blocks the thin portion of
the creasing rule will be fully supported by the
blocks substantially throughout its entire height.
The employment of creasing rules of different
width is made necessary through the fact that
a single width of creasing rule is not practical
for creasing all widths of cardboard. Figures 4
and 5 illustrate the action of creasing rules [2
and I3, being respectively of 2 point and 4 point
thickness increasing pieces of stock l4 and [5
respectively of different thickness.
It will be apparent that creasing rules embody
ing the principles of our invention may be used
in end to end or in any other relation with 2
point cutting rules and that they are freely inter
changeable, without the necessity of employing
any expedient for building up the thickness of
the thinner rule so as to enable it to be clamped
uniformly with respect to the thicker rule.
While we have in the above invention disclosed
what we believe to be a preferred and practical
embodiment of the same, it will be understood
to those skilled in the art that the details of
construction as illustrated and described are 10
merely by way of example and not to be con
strued as limiting the scope of the invention as
de?ned in the appended claims.
What we claim is:
1. In a box blank cutting and creasing die, in
combination with means having parallel equi
spaced clamping faces, a cutting rule and a
creasing rule having base portions both of the
same thickness adapted to be clamped between
said faces, said creasing rule having a portion 20
including the working face thicker than said
base portion.
2. creasing rule adapted to be clamped in end
to end relation with a cutting rule of standard
thickness, between the parallel equi-spaced faces
of clamping members in a chase, the creasing rule
having the base portion which is engageable by
said clamping means, of the same thickness as
the cutting rule, and having a portion including
the working face, of greater thickness than the 30
base portion.
3. Creasing rule comprising a metal piece hav
ing a base portion of uniform thickness through
out adapted to be clamped between blocks in a
chase, and a portion including the working face
adapted to project from said blocks said last
named portion being thicker than said base por
4. In combination a creasing rule and cutting
rule adapted to be arranged end to end between
equi-spaced clamping members, and of such
height as to project above said members, por
tions of said creasing and cutting rules which are
adapted to be engaged by said clamping mem
bers being of equal and uniform thickness
throughout, the projecting portion of said creas
ing rule being of greater thickness than the por
tion which is adapted to be clamped between said
clamping members.
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