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Патент USA US3077896

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Feb. 19, 1963
M. D. LEVITAN
3,077,387’
TWO ELEMENT BINDING
Filed April :50, 1959
JUVEJ'YZ‘UFI ,
MAUO/CE 0 LEV/TAN
hijriited htates harbor
l
3,077,887
TWQ ELEMENT BINDHNG
Maurice l). Levitan, Wilmette, Ill., assignor to General
Binding Corporation, Northbrooh, 111., a corporation of
Illinois
Filed Apr. 30, 1959. Ser. No. 807,265
1 Claim. (Cl. 129-1)
This invention relates to bindings and more particularly
to bindings or binding elements formed of flexible ma
terial such as those formed of a vinyl resin, Celluloid
or other plastic materials, as well as those formed of
?ber materials, including paper or the like.
3377,8837
r;
Edd
Patented Feb. 19, 1953
2
injection molding process are preformed in a curled
shape so that after the ?nger element has been‘ secured
in the channel groove the outer free ends of the ?ngers
can be laid on top of the backbone (that is on the inner
surface thereof) and such positioning of the outer free
ends of the ?ngers acts to keep the ring ?ngers in an
arched condition to wedge the comb-shaped ?nger ele
ment in the channel groove.
It has been found desirable in the binding ?eld to
also provide a means for locking the (free ends of the
ring ?ngers to the backbone to prevent opening of the
binding when the binding is subjected to a shock load or
the like. In order to retain the bound sheets within the
binder l have provided a locking arrangement wherein
More speci?cally, this invention is directed to a simple
- e end ring ?ngers are adapted to be mechanically
but rugged means of interconnecting the backbone with 15 interlocked with the backbone. The end ring ?ngers have
a separate curled-comb member in a two element binding.
notches formed ‘adjacent the outer free ends thereof which
Two element bindings have found wide acceptance
are cooperable with complementary interlocking slots in
in the binding ?eld since by providing a separate back
the backbone to mechanically interlock the ?ngers with
bone and ring ?nger element the ring ?ngers can be
the backbone. These locking ring ?ngers are adapted
inserted through the aligned perforations in a stack of
to overlie the outer surface of the backbone and to extend
sheets to be bound much more readily when the backbone
through the interlocking slots in the backbone to be
is not attached to the ring ?ngers. After the ?ngers have
mechanically interlocked therewith. As hereinbefore
been inserted through the perforations the backbone may
noted, the remaining ?ngers lie on the inner surface
then be ?tted on the ring ?nger element to secure the
of the backbone to arch these ?ngers to wedge the comb
25
?ngers in place and to thereby bind the sheets together.
shaped element within the channel groove. It will thus
Two element bindings heretofore produced however
be apparent that while more than two ring ?ngers may
have generally been so formed that in order to connect
be mechanically interlocked with the backbone in the
the separate elements with one another, one had to slide
foregoing manner a sufficient number of ?ngers must be
the ends of the curled comb element into and along a 30 positioned on the inner surface of the backbone to pro
groove or grooves in the backbone. In other words, the
curled comb element had to be inserted in the groove or
grooves at one end of the backbone and then slid axially
with respect .to the backbone from one end of the back
bone to the other.
I have devised a two element binding in which, on the
contrary, the separate elements can be connected to
gether by merely snapping the combdshaped element into
place in the backbone.
vide a sufficient force due to arching of a plurality of
?ngers for wedging the comb-shaped element within the
channel groove.
It will, of course, be understood that other means for
locking the ring ?ngers to the backbone may be effect
ed as long as a means is provided for arching a plurality
of the ring ?ngers to wedge the comb-shaped element
within the channel groove.
It is therefore a principal object of the present inven
Since the two element binding which is hereinafter 40 tion to provide a novel means for interconnecting the
described with particularly does not require that the
backbone with the comb-shaped ?nger element in a two
comb-shaped element be slid axially into place in the
element binding.
backbone, binding machines of relatively simple con
Another object of the invention is to provide a means
struction may be provided to secure the two elements of
for securing the comb-shaped ?nger element to the back
the binding together. It will be understood that the usage
bone in a two element binding wherein the elements may
of machines for this purpose, in the past, was not feasible.
The two element binding to which the present invention
is directed comprises generally a substantially ?at back
bone formed of ?exible material which has curved longi
tudinal edges. A channel member extends outwardly
from and is formed integrally with the substantially flat
backbone and has an outwardly turned leg facing to
be secured together in a binding machine and wherein the
elements can be snapped into place thus obviating the
necessity of sliding the comb-shaped ?nger element axially
within longitudinal grooves in the backbone.
A still further object of the invention resides in the
provision of an elongated channel groove extending along
one longitudinal edge of the backbone and a cooperat
ward one of the curved edges of the backbone which co
ing ?ange or leg secured to a plurality of ring ?ngers
operates with the curved edge of the backbone to form
which is adapted to be loosely positioned within the
a somewhat U-shaped channel groove.
55 channel groove and thereafter wedged within the groove
The comb-shaped element has an elongated element
by arching the ring ?ngers.
or arm which is bent substantially at right angles along
The novel features which characterize this invention
its longitudinal axis and which has a plurality of spaced
are set forth with particularity in the appended claim.
ring ?ngers formed integrally therewith and extending
The invention itself, however, both as to its organization
therefrom.
and manner of construction, together with further objects
The outwardly bent portion of the comb-shaped ele
and advantages thereof, may best be understood by refer
ment which, for convenience may be referred to as a ?ange,
ence to the accompanying drawings in which:
may be extended into the channel groove by ?exing the
FIGURE 1 is a fragmental pictorial view of a binding
curved edge of the backbone slightly. Thereafter, by
constructed in accordance with the principles of
arching the ring ?ngers the elongated ?ange will be 65 element
the present invention which is shown as being used to bind
wedged in the channel groove intermediate the curved
a plurality of perforated sheets;
edge portion of the backbone and the channel member.
FIGURE 2 is a vertical sectional view through the
By maintaining the ring ?ngers in this arched position,
binding element which forms the subject of the present
the curved edge portion of the backbone will be under
invention and which is taken along lines ll—II of FIG
constant ?exure so that a tight friction grip on the comb '10
URE 1;
shaped element will be effected.
FIGURE 3 is a fragmental vertical sectional view taken
The ring ?ngers which ‘are preferably formed by an
gorges’?
3
along lines II——II but which shows the cooperation of
the two elements of the binding when the comb-shaped
?nger element is being inserted within the channel groove;
FIGURE 4 is a fragmental plan view of the comb
shaped ?nger element;
FIGURE 5 is a fragmental view of the outer surface
4
manner illustrated in FIGURE 2 and the binding will
remain in this secured position even though substantial
forces acting generally perpendicularly with respect to the
backbone 10 are applied to the ring ?ngers 12.
In order to prevent the comb-shaped element 11 from
sliding axially within the groove 2.0, however, and to in
of the backbone showing one ring ?nger which is arranged
crease the load bearing capacity of the binding, the free
to be interlocked with the backbone; and
ends of the ring ?ngers 12 can be set on the inner surface
FIGURE 6 is a vertical sectional view through the
of the backbone 10. By positioning the free ends of the
binding which clearly illustrates the manner in which the 10 ring ?ngers 12 on the inner surface of the backbone It)
interlocking ?ngers are interlocked with the backbone.
the ?ngers are arched as shown in FIGURE 6 to wedge
The binding illustrated in the drawings comprises
the ?ange 24 within the channel groove 20. By arching
basically a backbone 10 and a comb~shaped ring ?nger
the ?ngers 12 slightly the ?ange 24 is urged to ?ex the
element 11 having a plurality of ring ?ngers 12 extending
curved edge 15 of the backbone 10 and this ?exure of the
therefrom. The ring ?ngers 12 are adapted to be in
resilient edge of the backbone 10 acts to frictionally en
serted through the aligned perforations in a stack of sheets
gage the ?ange 24 to prevent the comb-shaped element 11
13 to be bound and is arranged to be secured to the back
from sliding axially within the channel groove 20.
bone 10 in a manner which will hereinafter be described.
While the illustrated embodiment of the invention is
Referring now particularly to FIGURES 2, 3 and 6,
shown as including a backbone having curled longitudinal
the backbone 10 is substantially ?at but has its longitudinal 20 edges, locking of the ?nger element to the ‘backbone may
edges curled as at 15 and 16.
A laterally opening channel member 17 extends out
wardly from and is formed integrally with the backbone
10 and has an inner channel leg 18 which extends toward
the longitudinal curled edge 15 of the backbone 10, which
forms an outer channel leg, and which is angularly dis~
posed with respect to the leg 19 connected to the back
bone 10. The channel member 17 cooperates with the
curled edge 15 of the backbone 10 to de?ne a channel
be accomplished in substantially the manner set forth
above even though the longitudinal edges of the backbone
are substantially coplanar with the ?at inner surface there~
of. It is only necessary that the ?ange 24 be so bent with
respect to the adjacent portion of the ?nger element that
the ?ange will be wedged within the channel groove upon
arching of the ring ?ngers. In this same connection the
?ange 24 need not be formed at substantially a right angle
with respect to an adjacent portion of the ?nger element
groove 20 which is adapted to receive the elongated com 30 to e?ect locking of the ?nger element to the backbone but
mon leg 14 of the comb~shaped ?nger element 11.
need only be so formed that it can be wedged within the
A notch 21 is formed within the channel groove 20 at
channel groove upon arching of the ring ?ngers.
the junction of the legs 18 and I? and constitutes the
Furthermore it is not essential to the proper functioning
acute angle formed between the two integral legs.
of the binder lock hereinbefore described that each of the
The elongated element or leg 14 of the comb-shaped ' cooperating elements the formed of ?exible material.
element 11 is bent along its longitudinal axis as indicated
Thus, either the backbone or the ?nger element may be
at 23 so that a ?ange or arm 24 is formed which is bent
preformed in substantially the same con?guration as is
laterally away from the adjacent portion of the comb
shown on the appended drawings and insertion of the
shaped element 11.
?ange 24 into the channel groove 20 will be effected by
‘It will be understood that the backbone 10 and the 40 means of flexure of parts 15 and 17 or part 24, depending
comb~shaped element 11 are both formed of ?exible ma
upon which of the elements is formed of ?exible material.
terial and that the comb-shaped element 11 is so formed
With particular reference to FIGURES 4, 5 and 6, it
that the ring ?ngers 12 are precurled in substantially the
will
be noted that one of the end ring ?ngers 12a has a
manner illustrated in FIGURE 2.
tapered end portion 25 which is notched as at 26 to form a
The comb-shaped element 11 may be secured to the
narrow neck 27 in close proximity to its tapered end 25.
backbone 10 either by sliding the ?ange or arm 24 axially
A complementary T-shaped slot is formed within the
along the backbone 10 within the channel groove 20 or by
backbone 10 in alignment with the ?nger 12a and is
snapping the ?ange or arm 24 into the groove 20 in the
manner which will hereinafter be described. It will here
in be noted that many bindings have in the past been
devised wherein the comb-shaped element could be con
nected to the backbone by sliding the comb-shaped ele
ment axially along the backbone within cooperating
grooves in the backbone. As hereinbefore noted, how
ever, I have devised a securing means wherein the comb
shaped element 11 may simply be snapped into place and
in which axial sliding movement of the comb-shaped
element 11 relative to the backbone is not necessitated.
As a result, the comb-shaped element and backbone may
be secured together in a binding machine whereas two
element bindings in the past have not generally been so
constructed that it was feasible to interconnect the two
elements in a binding machine.
Referring particularly to FIGURE 3 of the drawings,
the ?ange or arm 24 is inserted within the channel groove
20 by ?exing the curved longitudinal edge 15 slightly out~
wardly and by similarly ?exing the leg 18 away from the
curved edge 15 of the backbone 10. As soon as the
?ange or arm 24 has cleared the outer edge of the back
bone 10 the ?ange 24 will be snapped into the channel
groove 20 by the resiliency of the curved edge 15 of the
backbone 10 and the leg 18.
Assuming that the free ends of the ring ?ngers are dis
posed on the outer surface of the backbone 10 the ?ange
24 will be positioned within the channel groove 20 in the
formed in such a manner that the base portion 28 of the
T-slot is of slightly greater width than the neck 27 and so
that the top 29 of the T-slot is formed so as to have a width
slightly greater than the width of the ring ?nger 12a.
The ring ?nger 12a may then be curled into the form
of a loop and inserted into the top 29 of the T-shaped slot
from the outer side of the backbone 10 in the manner iI
lustrated in FIGURE 6. When the ring ?nger has been
inserted into the T-shaped slot it will remain in the top
portion 29 of the T-shaped slot until the neck portion 27
of the ring ?nger 12a slips into the base portion or narrow
slot 28 of the T-shaped slot. At such time the ring ?nger
60 12a will be positively interlocked with the backbone 10 to
prevent accidental opening of the ring ?nger when the
‘binding is subjected to a shock load or the like.
While only one end of the binding is illustrated in FIG~
URE 5 the ring ?nger disposed at each end of the binding
in the preferred embodiment of my invention would be
arranged to mechanically interlock with the backbone in
the manner above described although more or less of the
ring ?ngers may be mechanically interlocked with the
backbone as desired.
It should be noted, however, that it is preferable that at
least some if not all the ring ?ngers lie on the inner
surface of the backbone 10 so that these ?ngers will be
arched to wedge the ?ange 24 within the channel groove
29.
It will further be understood that this embodiment of
3,077,887
5
the invention has been used for illustrative purposes 'only
and that various modi?cations and variations in the pres
ent invention may be effected Without departing from the
spirit and scope of the novel concepts thereof.
1 claim as my invention:
A binding element formed of ?exible material compris
ing a substantially ?at backbone having curled longitudinal
edges, a channel member extending from said backbone
for-med along one longitudinal edge thereof and cooper
6
of said ?ngers providing an interference ?t with the inside
of said backbone when said ?ange is in said channel and
the ?ngers are positioned inside the backbone whereby the
edge of said ?ange contacts the inner leg of said channel
and the line of bending of the leg of the comb-shaped
element contacts the outer leg of said channel inwardly of
the curled longitudinal edge thereof and whereby said
flange is wedged in said channel to resist longitudinal slid
ing separation of said ring member and said backbone and
resisting lateral separation of said ?ange from said chan
10
able therewith to de?ne a laterally open channel groove
nel groove while permitting assembly of the comb-shaped
having an inner leg and an outer curled leg, a elongated
element in said channel by lateral movement.
comb-shaped element comprising a leg positionable within
said ‘channel groove and having a plurality of spaced
curled ring ?ngers therealong and extending generally lat
erally therefrom, the free end of each of said ?ngers being 15
co-operable with the edge of said backbone opposite from
said channel groove to complete a closed ring, said comb
shaped element comprising ?at resilient sheet material of
substantially uniform thickness, said leg of the comb
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,244,663
2,314,204
2,845,931
2,910,068
shaped element being laterally bent along a line longitu
dinal of its length to provide a ?ange having a Width less
than the length of the outer curled leg of said channel and
having the edge thereof in engagement with the inner wall
of said inner leg of said channel, the unstressed condition
Adams _______________ __ June 10,
Fontecilla ____________ __ Mar. 16,
Kinney _______________ __ Aug. 5,
Lane ________________ __ Oct. 27,
1941
1943
1958
1959
FOREIGN PATENTS
729,537
776,531
Great Britain __________ -_ May 4, 1955
Great Britain __________ __ June 5, 1957
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