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Патент USA US3066690

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Dec. 4, 1962
J. K. DUNCAN
3,066,680
RING BINDER
Filed July 18, 1960
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INVENTOR.
.J'AMEs K. DUNCAN
BY
3M6; W4
@
United States Patent O??ce
1
3,066,689
RING BINDER
James K. Duncan, Park Ridge, iii, assignor to Duncan
Research, Chicago, lil., a partnership
Filed July 18, 1960, Ear. No. 43,470
5 Claims. (ill. 129-24)
log towards the other, which portions form what may be
termed the spine of the binder, with a pivotal connection
between the members in that spine.
The portion or" member 15 that extends towards mem
ber 16 comprises a neck 17 with a head ill on the end
thereof.
One side of head 13 is generally cylindrical
as indicated at 1%.
The present invention relates to an improved ring
a nose 2!}.
The opposite side of head 13 forms
t will be noted that nose 2% is de?ned by a.
binder or the like.
pair of ?at sides. These flat sides and the cylindrical
It is an object of the present invention to provide a 10 side It? extend the length of the rockable member 15.
ring binder having a pair of physically interengaging
relatively rockable members with coacting parts de?ning
sheet~securing rings when in the closed position, the con
formation and construction of the coacting parts being
such that they are yieldably secured in ring-closing posi
tion through their own ?exure. A feature of the pres—
ent invention in this regard is that while the members
are thus securely held in the ring closed position, they
may, at the desire of the user, be pivotally moved against
the ilexure of the parts to a ring-opening position for 20
insertion or removal of ?ller sheets or the like.
It is a further object of my invention to provide a ring
binder of the above type which may be inexpensively
fabricated from extruded plastic parts. The parts as
extruded may be so formed that the structure utilized
for securing the ring-holding members in the ring locked
position, as previously mentioned, is inherently a part of
the extrusions.
An additional object of my invention is to enable the
production of binders of the type mentioned which may
be fabricated with any desired number of rings to suit
the preferences of the manufacturer or user. The
binders may be made of attractively colored plastics.
They can be suitably provided with labelling guides.
The portion of member 16 extending towards member
15 comprises a pair of spaced arms 22 and 23 which ex
tend the length of the member 16. Adjacent the end of
arm 22 is a V recess 24 which ?ts about nose 2%. A
concave recess 25 adjacent the end of arm 23 ?ts about
cylindrical side lid.
The two ‘arms 22 and 23 are resil
iently urged toward each other to securely hold head
13 in the two recesses in the arms.
Members 15 and 16 have humps 27 and 2% respec
tively on the outside of the back thereof to facilitate
gripping the members when they are to be opened.
As
a part of arm 23 of member 16 there is a way 29 within
which a slide Iii} is received. Slide 3% may be of clear or
colored plastic, metal, etc. It can serve as a labelling
guide or merely give a contrasting, attractive appearance
to the spine of the binder.
Extending from the top of member 15 is a ridge 32
with a plurality of spaced, hooked claws 33 projecting
therefrom. Claws 33 are received in spaced openings
34 in cover ‘ii. The extending ends of the claws contact
the rings hereinafter described. A ridge 35 on member
16 de?nes an undercut slot 36 within which cover i2 is
received. A plurality of spaced embossments 37 project
rom ridge 35 into slot 36.
Embossments 37 are re
They may be formed with provisions to hold covers there
on or without cover-holding parts, as may be desired.
A more speci?c object of the present invention is to
provide a ring binder de?ned by a pair of extruded
eeived in spaced openings 38 in cover I12.
A plurality of curvilinear prongs ?ll} extend from the
side All of member .15. Similarly, a plurality of spaced
curvilinear prongs 42 extend fro n the side 43 of member
is.
rougs {iii and 42. are in pairs, with each pair form
plastic members de?ning sheet-receiving rings when in
closed position, in which one member de?nes a lengthy 40 ing a ring to pass through a punched opening 44-. in
sheets 13. The extending ends of the prongs did and 42
non~circular bearing socket and the other member de?nes
a cooperating complementary lengthy bearing cylinder,
have mating ‘ti-shaped ends as illustrated at 45 so as to
the parts mating when in prong-closing position and be
ing further effective to ?ex resiliently when rocked to
prong-opening position, the structure further being char
acterized by an absence of substantial prong-closing bias
after the parts have been initially swung a predetermined
distance in the prong-opening direction.
de?ne a continuous ring between sides 41 and 43 when
the binder is in the position illustrated in FIGURES l
and 2.
Members 15 and 16 may be formed of a continuous
plastic extrusion. After the extrusion of a length of ma
terial, pieces may be cut to size to form a binder of a pre
determined length. The portion of the extrusion repre
It is additionally an object of the present invention to
provide a unit of the foregoing type in which no hinge 50 sented by prongs 42d and 42 and claws 33 may be cut
away to leave only the prongs and claws. Projections
pin and the associated structure is required and the ex
37 may be formed by embossing the inner side of ridge
truded plastic members themselves form the relatively
rockable parts.
35 along slot 36. The extrusion and cutting of plastic to
form the rings and the like are more fully described
Further objects and advantages of my invention will
in my pending applications Serial No. 753,548, ?led
be apparent from the following description taken in con
junction with the drawings, in which:
August 6, 1958, and 778,804, ?led December 8, 1958,
the disclosure of each of which is incorporated herein
FIGURE 1 is a perspective view of a binder with
covers and ?llers held therein;
FIGURE 2‘ is an enlarged partial section as viewed
‘along line 2~2 of FIGURE 1;
by reference.
After the extrusion of members 35 and 16 and either
before or after the cutting to form the prongs, etc., the
two members may be assembled by inserting head 18
into the socket formed by recesses 24 and 25. The com—
FIGURE 3 is a sectional view corresponding to FIG
URE 2 of an alternative form of binder;
pleted binder is releasably ?xed in the position illustrated
FIGURE 4 is a sectional view corresponding to FIG
in FIGURES 1 and 2 by the engagement of nose 20
URE 2 of another alternative form of binder; and
in the V recess 24. The nose 2t} forms what may be
FIGURE 5 is a sectional View corresponding to FiG
termed a detent to releasably ?x the socket joint so that
URE 2 of a further alternative form of binder.
the members 15 and 16 will stay in the normal, ring
The structure illustrated in FIGURES 1 and 2 is that
closed, position illustrated in FIGURE 2. Upon pivot
of a binder generally 10 in which is held a pair of covers
ing the bumps 27 and 28 towards each other the members
11 and 12 and a plurality of punched ?ller sheets 13. 70 15 and 16 may pivot a total of about 37° from the posi
Binder 10 comprises a pair of rockable members 15 and
tion illustrated in FIGURE 2, thus providing an adequate
16. Each of members 15 and 16 has a portion extend
opening between the ends of the prongs 49 and 42 for
/
aoeaeso
3
163 are provided with inward projections 104 and 105 to
the insertion and removal of pages 13. The friction in
engage the openings 106- and 107 of covers 198 and 169.
the socket joint will hold the members 15 and 16 in that
The binder 85 illustrated in FlGURE 4 is particularly
position. When the pages 13 have been changed, the
adapted for large, quick-openingring binders. The num
members 15 and 16 may be pivoted in the reverse direc
ber of rings formed by prongs 9i;- and 95 would be deter
tion by the application of a suitable force to the prongs
mined by the preferences of the manufacturer and user.
or to ridges 32 and 35 to return the members to the posi
Normally it would be made with the number of prongs
tion illustrated in FIGURE 2.
being between 2 and '7. The detent formed by the sharp
The binder generally 49 of FIGURE 3 comprises a
curvature portion 92 will releasably hold the mem
pair of rockable members 50 and 51. Member 59 has a
bifurcated portion 52 extending toward member 51 with 10 bers $6 and 87 in the ring-closed position illustrated in
FIGURE 4, yet the binder can be easily opened by a
the end thereof forming a generally cylindrical socket
pivotal pressure applied to ridges 98 and 99. The cylin
surface 53. Similarly, member 51 has a portion 54. ex
rical surfaces of head .39 and socket 90 will provide
tending toward member 50 with a generally cylindrical
sufficient frictional engagement to hold the binder in the
head 55 on the end thereof. While in the main the socket
desired ring open position.
surface 53 and the head 55 are cylindrical, they have
The binder generally 115 illustrated in FIGURE 5
mating ?at parts 56, 57 and 58 to normally lock the
comprises a pair of rockable members 116 and 117. As
socket connection in the ring-closed position, as illustrated
originally extruded (if that method of manufacture is
in FIGURE 3.
employed), member 116 is formed with a generally cylin
Bifurcated portion 52 has a way 6%] at the back side
thereof to receive a slide 61.
The slide 62 is received in
a way 63 along the back side of portion 54. The rear
corners of members 51} and 51 have humps 64 and 65
respectively de?ning grooves to facilitate applying pres~
sure to the members for a pivotal movement to open the
rings.
Binder 49, like binder 11}, has a plurality of rings
spaced therealong. Each ring is formed of a curvilinear
prong 66 extending from side 67 of member 5111 and a
prong 68 extending from side 6% of member 51. The
extending ends of prongs 66 and 63 are curved to mate
drical head 118 and member 117 is formed with a gen
erally cylindrical socket 119. However, when the prongs
129 and 121 are cut from the curvilinear extrusion, the
head 11% and socket 119 are similarly cut so that the
portions thereof coplanar with the prongs are in the
form of strips 122 and 123 respectively. In this embodi
ment, a pair of mating flat surfaces 124 and 125 in strlps
122 and 123 interrupt the generally cylindrical con?gura
tion and de?ne a detent to normally hold the binder in
the ring-closed position illustrated in FIGURE 5.
Prongs 126 and 121 project from sides 127 and 128
of members 116 and 117 respectively. Where the ex
tending ends of the prongs 129 and 121 come together, in
tinuous ring between sides 67 and 69 when the members
the ring~closed position, the extending end of one is
51) and 51 are in the ring-closed position illustrated in
shaped to fit into a recess in the other as illustrated at
FIGURE 3. Member 50 has a ridge 72. de?ning a slot
73 within which cover 74 is received. To engage the 35 129.
The portion of member y116 that extends towards
opening 75 in cover 74 the inner side of ridge 72 de?ning
member 117 and de?nes head 118 is recessed as illus
slot 73 is provided with a plurality of embossments '76
with each other as illustrated at 79, thus de?ning a con
trated at 130* ‘and 131 to de?ne a way to receive ‘and hold
which project into opening 75. Similarly, ridge 77 de
slide 132. The outer rear corners of members 116 and
?nes a slot 78 and embossment 79 which project into
117 de?ne ridges 133‘ and 134 having claws 135 and 136
openings iii) of cover 81.
projecting therefrom back towards the main body of
The pressure applied to humps 64 and 65 will act to
members 116 and 117. Claws 135 and 136 project
move those humps rearwardly towards each other to pivot
through openings 137 in covers 138.
head 55 in socket 53. Without the application of such
The detent de?ned by ?at portions 124 and 125 of head
a pressure, the detent means formed by ?ats 56, 57 and
118 and socket 119 normally will hold the binder in the
53 will hold the two members 51} and 51 in the ring
ring-closed position illustrated in FIGURE 5. However,
closed position illustrated in FIGURE 3. Such a pivotal
even with the slide 132 in position as illustrated, members
movement can snap the rings partially opened, a 15°
116 and 117 may be rocked rearwardly towards each
movement of head 55 in socket 53, or all the way opened,
other a full 90° to open the rings de?ned by prongs 120
which is a total 60° rotation of head 55 in socket 53.
Of course, to close the rings a pressure of ridges 72 and 50 and 121.
It will be observed that with the constructions here
'77 towards each other will result in a reverse pivotal
shown ‘and described, one of the rockable members has
movement, bringing the prongs 67 and 68 together to
portions that ?ex on initial opening movement, thereby
form a continuous ring as illustrated.
holding the rockable members in prong-closing position.
The binder generally 85 illustrated in FIGURE 4 com
Once this initial ?exure takes place in response to the
prises a rockable member 86 and a rockable member 87.
applied moment, some further opening movement of the
Member 36 has an elongated portion 88 extending toward
rockable members can be made without increased ?exure.
member 87 with the end of portion 88 being bifurcated
Thus, once the initial opening movement takes place, the
and de?ning a generally cylindrical head 89. Head 89
further opening movement is made under applied mo
is received in a 1generally cylindrical socket 94) formed by
ment that is only su?icient to overcome the frictional re
60
the side of member 87 extending toward member 86.
sistance of the parts.
Hooked portions 91 coplanar with the rings also de?ne a
In accordance with a further feature of the invention,
part of the socket 9%}. While the head 89 and socket gt)
such
as is shown in FIGURE 2, the ?exing portions of
are generally cylindrical, one part thereof is formed of
the unit move at least to some degree towards their re
a much sharper radius of curvature than is the general
cylindrical portion. This part is illustrated at 92 and 65 laxed positions upon further prong-opening movement.
This gives a desirable holding action in the prong-opened
de?nes a detent means to releasably hold the members
86 and 87 in the rotational position illustrated in FIG
position.
As shown by the angles 0, FIGURES 2-5, the respec
URE 4.
tive pairs of rockable members may be rocked to prong
The rings are formed by curvilinear prongs 94 and 70 opening position to a predetermined extent, at which time
95 extending from sides 96 and 97 of members 86 and
the parts engage to arrest further opening movement‘
87 respectively.
At the opposite side of members 86
and 87 are ridges g3 and 33’ to facilitate grasping mem
bers 86 and 87 for pivotal movement. A way 1%‘ in
elongated portion 83 receives a slide 161.
Flaps 1&2 and
The stop faces that provide this action are identi?ed at,
s——s in the respective ?gures.
It will be noted that with the binder of the: present in‘
vention the parts are in a relatively relaxed condition;
5
when the prongs are closed.
3,066,680
Consequently there is a
minimum tendency for plastic creep or change in shape
with time, which is undesirable.
The foregoing description of speci?c embodiments is
socket; a second rockable member de?ning an elongated
head of mating conformation to said socket when said
members are in predetermined orientation, the ?rst and
second rockable members having parts de?ning closed
sheet-receiving prongs when in said predetermined orien
tation, one of said members further having an elongated
slot extending in a plane passing through said head when
said members are in said predetermined orientation and
for the purpose of complying with 35 U.S.C. 112 and
should not be construed as imposing unnecessary limita
tions upon the appended claims inasmuch as modi?ca
tions and variations thereof will be apparent to those
skilled in the art from the foregoing description.
de?ning ?exing portions capable of resilient ?exure per
I claim:
10 mitting the members to be rocked relative to each other
1. A two~part ring binder capable of retaining the
in the prong-opening direction and out of said predeter
ring-closed position under applied moment less than a
mined orientation.
predetermined value, comprising in combination: a ?rst
4. A two-part ring binder adapted to receive a label
rockable member de?ning an elongated socket with an
and capable of retaining the ring-closed position under
axis having a generally cylindrical portion on one side of 15 applied moment less than a predetermined value, com
a plane extending through said ‘axis, and an opposed
prising in combination: a ?rst rockable member extend
V-shaped portion on the other side of a plane extending
ing the length of said binder and de?ning a resiliently ’
through said axis, said portions being separated by an
?exible socket elongated in the direction of said length
elongated slot in said plane; a second rockable member
and non-circular as viewed in a plane normal to said
de?ning an elongated head having a rigid cylindrical por 20 length; a second rockable member de?ning an elongated
tion and an opposed rigid V-shaped portion, said portions
head of mating conformation to said socket and received
mating with the socket de?ned by the ?rst rockable mem_
therein, whereby ?exure of the ?rst rockable member
her when said members are in predetermined orientation,
resiliently accommodates rocking of said head in said
said second rockable member tur'zher de?ning a stop sur
socket despite the non-circularity of the same, said mem
face adapted to seat against said ?rst rockable member 25 bers on one side thereof de?ning closed sheet-receiving
when the second rockable member isrrocked more than
prongs when said socket and said head are oriented in
a predetermined amount in a predetermined direction
the position of mate, and having a transparent portion
from said predetermined orientation, said ?rst member
located on the opposite side thereof in relation to said
being of resilient material capable of ?exing in response
prongs, with its surface forming a continuation of the
to predetermined applied moment to rock the members 30 head and de?ning the backbone of the binder, said trans
out of the mating relationship, said members de?ning
closed sheet-receiving prongs when said socket and said
parent portion having an internal longitudinal cavity
adapted to receive a label strip for viewing from the back
head are oriented in said predetermined orientation and
opening to receive sheets when the second rockable mem
ber is rocked said predetermined amount in said prede
side of the binder.
termined direction.
2. A two-part ring binder capable of retaining the ring
closing position under applied moment less than a pre
determined value, comprising in combination: a ?rst
rockable member de?ning an elongated socket with an
axis, a generally cylindrical portion on one sidelof a
plane extending through said axis, and an opposed
V-shaped portion on the other side of a plane through
5. A two-part ring binder capable of retaining the
ring-closed position under applied moment less than a
predetermined value, comprising in combination: a ?rst
rockable member extending the length of said binder
and de?ning a relatively rigid socket elongated in the di
rection of said length and non-circular as viewed in a
plane normal to said length; a second rockable member
de?ning an elongated head of mating conformation to
said relatively rigid socket when in one position of orien
tation and received within said relatively rigid socket,
said axis, said portions being separated by an elongated
said head being of two-part construction de?ned by a
slot in said plane; a second rockable member de?ning an 45 slot extending longitudinally of said rockable member
elongated head having a mating rigid cylinder portion
and away from said head, whereby prong ?exure of the
and an opposed V~shaped portion, said portions mating
second rockable member resiliently accommodates rock
with the socket de?ned by the ?rst rockable member
ing of said head in said socket despite the non~circularity
when said members are in predetermined orientation,
of the socket, said members de?ning closed sheet-receiv
said ?rst member being of resilient material capable of 50 ing prongs when said socket and said head are oriented
?exing in response to predetermined applied moment to
in said position of orientation.
rock the members out of the mating relationship, said
References Qited in the ?le of this patent
members de?ning closed sheet-receiving prongs When
said socket and said head are oriented in said predeter~ 55
UNITED STATES PATENTS
mined position.
3. A two-part ring binder capable of retaining the
ring-closed position under applied moment less than a
predetermined value, comprising in combination: a ?rst
rockable member de?ning an elongated nomcircular 60
470,334
735,879
775,099
1,652,965
2,677,853
Karo ________________ __ Mar. 8, 1892
Jackson _____________ __ Aug.
Wendland ___________ .._ Nov.
Way _______________ _.. Dec.
Ross ________________ __ May
11,
15,
13,
11,
1903
1904
1927
1954
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