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Патент USA US2119843

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June 7, 1938.
'
.
D. A. BRENNAN
‘ _
PAPER FASTENER
Filed Sept. 5. 1933 ‘
\~ ...... h
‘
2,119,843
Patented June 7, 1938
2,119,&43
UNITED STATES
PATENT
. r
2,119,843
PAPER FASTENER
Daniel A. Brennan, Chicago, Ill.
Application September 5, 1933, Serial No. 688,099
34 Claims. (Cl. 24—153)
This application is a continuation-in-part of
of the apertures, and in other instances are slid
able outwardly over the prongs from a position
my co-pending application, Serial No. 476,058,
?led August 18, 1930.
The invention relates to improvements in fas
intermediate the apertures.
The invention relates, primarily, to the novel
5 teners for binding a stack of papers, such as let
ters in ?les, and particularly to an improved pa
per fastener including a base having prongs
are adapted to be detachably secured in adjusted
position over the bent-down prongs.
adapted to extend through apertures in the stack
Referring particularly to Fig. l the fastener,
of papers, and a compressor having similarly
constituting one embodiment of the invention,
comprises a base II having prongs I2 on opposite 10
ends, and an elongated compressor I3 having
spaced apertures or perforations I4 adapted to
receive the prongs. The prongs preferably are
substantially less in width than the body of the
'10 spaced apertures adapted to receive said prongs
therethrough, the free end portions of the latter
being adapted to be bent downwardly over said
compressor and to be held in place by latches. ‘
One object of the invention is to provide an
15 improved fastener of the foregoing type with
novel means for effecting a yieldable engagement
between the prongs and the latches, to resist
displacement after the latter are moved into
2.0
base and are struck up substantially at right an
Spaced parallel elevated guides or tracks I 5 are
provided along the opposite longitudinal sides of
the compressor I3.
Another object is to provide an improved fas
tener of the type described with novel means for
effecting a frictional engagement between the
prongs and the latches to resist displacement of
formed by folding the marginal side edges of the
Another object is to provide an improved fas
tener of the type described with latches having
means movable into yieldable frictional engage
30 ment with means on the compressor and on the
prongs to hold said latches in predetermined vari
able positions on the compressor.
Another object of the invention is to provide
an improved fastener, inexpensive to manufac
35 ture and simple in operation.
The foregoing and such other objects of the
invention as will more fully appear hereinafter
will be more readily understood from a perusal
of the following speci?cation, reference .being had
40 to the accompanying drawing, in which:
Fig. 1 is a perspective View of a fastener em
bodying features of the invention.
Figs. 2 and 3 are plan views of two modi?ed
forms of fasteners.
Fig. 4 is a transverse sectional view taken on
line 4—4 of Fig. 3.
Paper fasteners of the type comprising a base
with prongs adapted to pass through apertures in
a stack of papers, and a compressor having reg
50 istering apertures adapted to receive said prongs,
in some instances are provided with latches slid
able over the prongs after the latter are bent
downwardly over the compressor. In such de
vices, the latches often are arranged to slide in
5.5 wardly over the prongs from a position outwardly
15
gles thereto.
position to hold the prongs over the compressor.
the latches after they are moved over and into
25 engagement with the prongs, in any of their vari
able positions on the compressor.
45
construction of a fastener in which the latches OX
Preferably, the guides I5 are
compressor I3 upwardly and then inwardly as
shown, and extend between the apertures Ill.
The guides I5 serve to reinforce the compressor
I3, and to con?ne the prongs I2 laterally when
the latter are bent downwardly over and against
the compressor. Preferably, the ends of the
guides I5 are struck downwardly against the base
of the compressor I3 inwardly of or adjacent the
apertures I4 to constitute stops I6.
In the form of fastener shown in Fig. 1 the _
projecting end portions of the prongs I2 are bent '
inwardly from the apertures I4 towards each
other. Two latches I‘I, each formed of a strip
of metal extending transversely of the compressor
I3, are mounted to slide along the guides I5 be
tween the stops I6. Each latch preferably is
provided with an intermediate elevated or bridge
like portion I8, and two shoe portions lilconnected
thereto by substantially vertical walls 2| under
lie the guides I5. The latches H are initially lo
cated inwardly of the downwardly bent prongs
I2, and are then movable outwardly over the
ends of the prongs to hold the latter against the
compressor I3.
To secure the latches I'l releas
ably in position over the underlying endsof the
prongs I2, each of said ends is formed, preferably
in each edge, with a notch or recess 22, and each
latch is formed with a lateral detent 23 stuck in
wardly from one of the side walls 2| and adapted
to engage in the associated recess. Preferably,
the recesses 22 and the co-acting detent or side
walls are arcuate in contour. The latches I'I
preferably are made of yieldable material so that
the side walls 2| can ?ex or spread upon receiv
ing the endsof the prongs I2 to cause the detents _ 55
2
2,119,843
It
base with spaced prongs, a compressor having
will be evident that the interlocking frictional
spaced apertures adapted to receive said prongs,
said prongs being adapted to be bent downwardly
against said compressor, and latches secured to
said compressor for longitudinal sliding move
'23 to frictionally engage in the recesses 22.
engagement between the prongs l2 and the side
walls 2| co-acts to secure the latches I‘! yieldably
in the most advantageous latching position.
The fastener shown in Fig. 2, is like that shown
in Fig. 1, except that here the latches I‘! have
a detent 23 on each side wall, each of which is
embracingly engaged by a notch 22 in the prong.
10 In this form the stops I6 on guides I5 are located
inwardly of the apertures M.
extending projections, to prevent the latches I‘!
from sliding inwardly past the intermediate por
tion of the compressor l3.
The latches Ila have ends l9 slidably under
lying the guides l5 as in the forms of Figs. 1 and
2, but differ from said forms in that they have
intermediate elevated or bridge-like portions 25
which extend outwardly beyond the inner longi
30 tudinal margins of the guides to de?ne overlying
?anges 24, and then are struck under to join
with curved side walls 2la. Preferably the in
termediate portions 25 are slightly curved down
wardly over the prongs l2. Also, both side edges
of the prong l2 are formed with recesses 22, and
both side walls 2| a of the latches Ila preferably
are formed with inwardly projecting detents 23
or the equivalent for engaging in the recesses to
frictionally hold the latches releasably in binding
40 position over the prongs.
To retain the latches l‘l‘a yieldably outwardly
of the apertures l4, the base of the compressor
l3 may beformed at each end, beneath one
guide [5, with an upstanding projection 21
45 adapted to engage with a recess 28 in the under
side of one shoe portion I8 of the associated latch
upon movement of the latter into its outermost
position, or an upstanding projection 210. may
be provided on the compressor inwardly of the
50 guides to co-operate with one side wall 2 la of the
latch and frictionally retain it outwardly of the
aperture.
Although various exemplary forms and adapta
tions of the improved fastener have been illus
55 trated in the accompanying drawing and de
scribed in detail in the foregoing speci?cation, it
is to be understood that the features of the pres
ent invention may be incorporated in other fas
teners of the general type shown, or otherwise
varied in structural detail and arrangement
without departing from the spirit and scope of
the invention as expressed in the appended
claims.
‘
I claim:
65
of one prong being formed with a recess, the
latch associated with said one prong having a
detent movable yieldably into engagement with
said recess to hold said latch frictionally in posi 10
tion.
The fastener illustrated in Figs. 3 and 4, is gen
erally similar to the fasteners just described, and
like parts are therefore identi?ed by the same
15 reference characters. In this instance, the ele
vated portions of the guides l5 extend outwardly
beyond the apertures l4 so that the latches Ila
are adapted to be moved inwardly over the down
wardly bent prongs l2. The guides I5 preferably
are depressed centrally of‘ their ends, as indi
cated at 26, or may be provided with downwardly
25
ment respectively over said prongs, one side edge
1. A paper fastener having, in combination, a
base with spaced prongs,‘ a compressor having
spaced apertures adapted to receive said prongs,
said prongs being adapted to be bent downwardly
against said compressor, and latches secured to
70 said compressor for longitudinal sliding move
ment respectively over said prongs, said latches
having side walls movable into frictional engage
ment with‘ said prongs to hold said latches releas
ably in position of adjustment over said prongs.
2. A paper fastener having, in combination, a
75
‘
3. A paper fastener having, in combination, a,
base with spaced prongs, a compressor having
spaced apertures adapted to receive said prongs,
said prongs being adapted to be bent downward 15
ly against said compressor, and latches secured to
said compressor for longitudinal sliding move
ment respectively over said prongs, each prong
being formed in one side edge with a recess, each
latch having a detent movable yieldably into en~ 20
gagement with the recess of the associated prong
to hold said latch friotionally thereover.
4. A paper fastener having, in combination, a
base with spaced prongs, a compressor having
spaced apertures adapted to receive said prongs,
said prongs being adapted to be bent down
wardly against said compressor, and latches se
cured to said compressor for longitudinal sliding
movement respectively over said prongs, each
prong being formed in opposite side edges respec
tively with two recesses, each latch being formed
in opposite sides with two detents movable into
engagement with the recesses of the associated
prong, whereby said latches are adapted to be
held frictionally in position over said prongs.
35
5. A paper fastener having, in combination, a
base with two spaced prongs, a compressor hav
ing two spaced apertures adapted to receive said
prongs, said prongs being adapted to be bent
downwardly against said compressor, two latches
slidable along said compressor for movement re
spectively over said prongs, each prong having
an offset recess and each latch being movable
into engagement with the recess of the associated
prong, said recesses partially embracing said
latches, and co-action therebetween acting to se
cure said latches releasably in predetermined po
sitions respectively over the free ends of said
prongs.
6. A paper fastener comprising a base having
prongs, a compressor provided with spaced open
ings to receive said prongs, said prongs being bent
over against said compressor, said compressor
'50
having its longitudinal edges folded over to form
guides, latches having their ends formed to em 55
brace said guides, and an intermediate bridge-like
portion formed in each latch between said longi
tudinal guides, said latches being movable respec
tively over said prongs to hold the latter down
against said compressor, said latches each being 60
formed to detachably engage at least one edge of
the underlying prong adjacent its end to fric
tionally hold the latches in position over said
prongs.
'7. A fastener comprising, in combination, a
compressor having spaced openings one in each
end, a base having similarly spaced prongs, said
65
prongs being adapted to be inserted through said
openings and then bent inwardly towards each 70
other against said compressor, the sides of said
compressor having longitudinal guides, and
latches being slidable on said guides one over
each of said prongs to hold the latter down against
said compressor, each of the latches resiliently
3
2,119,848
engaging oifset recesses in the underlying prong
to retain it over said prong.
8. A paper fastener having in combination, a
base having bendable prongs, a compressor with
spaced openings to receive said prongs, the prongs
being adapted to be bent down against the com
pressor, longitudinal guides on said compressor,
and latches slidable along said guides one over
each bent down prong, and means in said latches
adapted to move into binding engagement with
at least one edge of the underlying prong.
9. A paper fastener comprising a base having
bendable prongs, a compressor having spaced
openings to receive said prongs, the end portions
15 of said prongs having recesses and being bent
inwardly towards each other against said com
pressor, said compressor having its longitudinal
edges forming guides, and latches having upper
and lower marginal end flanges embracing said
guides and intermediate bridge-like portions
formed by said latches extending between said
longitudinal guides, said latches being movable
from an intermediate position between the bent
down ends of said prongs outwardly respectively
25 over said prongs to hold the latter down against
the compressor, said latches having means to de
tachably engage the recesses on the underlying
against the top of said compressor, and two
latches slidably mounted on said'compressor for
movement respectively over the downwardly bent
portions of saidprongs to retain the latter against
said compressor, each of said latches being mov (it
able into said recesses in the underlying prong.
14. A paper fastener having, in combination, a
base having spaced prongs, a compressor having
spaced openings to receive said prongs, said
prongs being adapted to be bent downwardly 10
against said compressor, the longitudinal edges of
said compressor being folded over to form guides,
bridge-like latches slidable along said guides, the
central portions of said latches being elevated to
pass over said prongs, said latches being movable 15
from an intermediate position outwardly respec
tively over said prongs toward said openings, said
guides being depressed at their ends to limit out
ward movement of said latches, and complemen
tal co-acting means formed on the side edges of 20
said prongs adjacent their free ends and on said
latches to provide interlocking elements to yield
ingly hold said latches over the ends of ‘said
prongs.
15. A paper fastener comprising a base having 25
prongs, a compressor having spaced openings to
prong to yieldingly hold said latches in position
receive said prongs, said prongs being adapted
to be bent inwardly towards each other against
over the ends of said prongs.
10. A fastener comprising, in combination, a
said compressor, longitudinal guides on the com
pressor, bridge-like latches having their ends ar
compressor having spaced openings one at each
end, a base having similarly spaced prongs, said
prongs being adapted to be inserted through said
openings and then bent inwardly toward each
other against said compressor, and two latches
movable along said compressor from a position
intermediate the ends of the bent down prongs
outwardly respectively over said prongs toward
said openings, each of said latches being formed
40 to embracingly engage said prongs whereby said
ranged to slide along said guides and their cen
30
latches are held over the prongs.
11. A paper fastener comprising a base having
spaced resilient bendable prongs, a compressor
over which said prongs are adapted to be bent,
45 and a latching member movable on the compres
sor longitudinally thereof and having a bridge
portion extending transversely over said compres
- sor, at least one of said prongs being formed to
provide embracing and resilient interlocking en
50. gagement between the prong and said latching
member when the latter is located in a predeter
mined position with respect to said prong.
12. A fastener comprising, in combination, a
?at elongated base provided with two longitudi
55 nally spaced prongs adapted to be bent upwardly
into substantially parallelism, said prongs hav
trol portions elevated to pass over said prongs,
said latches being movable from an intermediate
position outwardly respectively over said prongs
toward said openings, means on said guides to .
limit outward movement of said latches, and
means on one edge of at least one prong and on
at least one latch formed to provide interlocking
elements to yieldingly hold said latch over the end
of said prongs.
16. A paper fastener comprising, a base hav
ing prongs, a compressor having spaced openings
to receive said prongs, said prongs being bent
inwardly towards each other against said com-v
pressor, the longitudinal edges of said compres 45
sor being folded over to form guides, said guides
extending
outwardly beyond said openings,
latches slidable along said guides, a central ele
vated portion on each latch adapted to pass over
said prongs, means on said guides to limit out 50
ward movement of said latches and frictionally
‘retain them outwardly of said openings, said
latches being movable from beyond said openings
inwardly respectively over said bent down prongs,
and means on the edges of said prongs adjacent 55
their ends and on said latches formed to provide
ing recesses on their free ends, a flat elongated
interlocking elements to yieldingly hold said
=compressor having two longitudinally spaced ap
latches over the ends of said prongs.
17. A paper fastener comprising, a base hav
ertures for said prongs to pass through, said
60 prongs being adapted to be bent downwardly
against the top of said compressor, and two
ilatches slidably mounted on said compressor for
movement respectively over the downwardly bent
'portions of said prongs to retain the latter against
said compressor, each of said latches being mov
able into interlocking engagement with the re
cesses in the underlying prong.
13. A fastener comprising, in combination, a
?at elongated base provided with two longitudi
nally spaced prongs adapted to be bent upwardly
into substantially parallelism, said prongs hav
ing recesses on their free ends, a ?at elongated
compressor having two longitudinally spaced ap
ertures for said prongs to pass through, said
75 prongs being adapted to be bent downwardly
30
ing prongs, a compressor having spaced openings 60
to receive said prongs, the prongs being adapted
to be bent inwardly toward each other against
said compressor, longitudinal guides on said com
pressor, said guides extending outwardly beyond
said openings, latches having their ends engaging
in said guides and their central portions elevated
to pass over said prongs, means on said guides
to limit outward movement of said latches and
frictionally retain them outwardly of said open
ings, said latches being movable from beyond 70
said openings inwardly respectively over the bent
down prongs, and co-operating means on one edge
of each of the prongs adjacent its end and on the
associated latches formed to yieldingly hold said
latches in position.
75
4
2,119,843
18. A fastener comprising, in combination,v a
compressor having spaced openings one in each
end, a base having similarly spaced prongs one
on each end, said prongs being adapted to be in
serted through said openings and then bent in
wardly towards each other against the com
pressor, the sides of said compressor being formed
provided with prongs, one at each end, a com
pressor apertured to receive said prongs, and
latches on said compressor slidable into frictional
engagement with the edges of said prongs. '
27. In a fastener including a compressor, a base
to provide longitudinal guides, said guides extend
ing outwardly beyond said openings, latches
slidable along said guides, and spaced vertical
edge of each prong being recessed adjacent‘ its
walls in said latches, said latches being mov
able inwardly from the respective ends of said
compressor over the bent down end portions of
the prongs, said vertical walls moving into re
15 silient binding engagement with the edges of the
underlying prongs.
an
enlongated
one extending from each end, and at least one
free end for cooperating with means on said
compressor.
10
28. A fastener comprising, in combination, a
?at elongated base provided with two longitu
dinally spaced prongs adapted to be bent up
wardly into substantially parallelism, each prong
having a recess on its free end, a ?at elongated 15
compressor, said prongs being adapted to be bent
19. In a fastener including a compressor, a base
comprising,
including, an elongated member having prongs,
member
having
prongs, one at each end, and one edge of each
20 prong having a recess adjacent its free end
adapted to co-operate with means on the com
pressor.
20. In a fastener, a compressor comprising, an
downwardly against the top of said compressor,
and two latches slidably mounted on said com
pressor, for movement respectively over the
downwardly bent portions of said prongs 'to 20
retain the latter against the compressor, each
of said latches being movable into interlocking
engagement with the recess in the underlying
elongated member having‘ longitudinal guides,
prong.
latches slidable in said guides, an intermediate
elevated portion in each latch including substan
tially vertical walls, and a detent in one or both
29. A fastener having, in combination, a base 25
provided with spaced prongs, a compressor over
which said prongs are adapted to be bent, and
of said Walls.
latches on said compressor slidable into frictional
'
21. A fastener comprising, in combination, a
30 compressor having spaced openings, a base having
similarly spaced prongs, said prongs being
adapted to be inserted through said openings and
then bent inwardly toward each other against
said compressor, longitudinal guides formed on
the side edges of the compressor, latches slidable
on said guides over the underlying prongs to
hold the latter down against said compressor, and
means on said latches to embrace and friction
ally engage the edges of the underlying prongs
40 to retain said latches over said prongs.
22. In a fastener, a base including, an elongated
member having prongs, one extending from each
end, and each prong having a recess on each edge
adjacent its free end.
23., A fastener having, in combination, a com
pressor, a base including an elongated member
having prongs extending at right angles there
from, one at each end, and means formed on at
least one edge of each prong adapted to co-act
50 with means on said compressor to hold said
prongs to the compressor.
24. A fastener having, in combination, a base
provided with prongs one extending from each
end, a compressor through which said prongs ex
O1 La tend, latches slidable on said compressor, and
means in said latches to engage the edges of
said prongs.
25. A paper fastener comprising a base hav
ing bendable prongs, a compressor with spaced
60 openings to receive said prongs, said prongs being
adapted to be bent inwardly toward each other
against said compressor, longitudinal guides
on said compressor, latches slidable along said
guides one over the bent down portion of each
of said prongs, and means in said latches adapted
to move into resilient engagement with at least
one edge of the underlying prong.
26. A fastener having, in combination, a base
'.
engagement with ‘the edges of said prongs.
30. In a fastener, a compressor comprising an 30
elongated member, latches slidable longitudinally
along said compressor, an intermediate elevated
portion in each latch including substantially ver
tical walls, and a. detent in one or both of said
walls.
7
35
31. In a fastener, a compressor of the type
adapted to have prongs folded thereover com
prising an elongated member, latches slidable
along said compressor into position over said
prongs, and means in said latches adapted to 40
frictionally embrace said prongs to prevent free
movement of said latches along said compressor.
32. In a fastener including a compressor hav
ing latches slidable thereon, an elongated mem
ber having prongs adapted to be bent over said 45
compressor, means on at least one edge of each
prong arranged to be frictionally engaged by said
latches.
33. A fastener base of the type having prongs
adapted to co-operate with a compressor having 50
latches thereon, and means on at least one edge
of at least one of said prongs adapted to be fric
tionally engaged by said latches.
34. A paper fastener comprising a base having
bendable prongs, a compressor over whichv said 55
prongs are adapted to be bent, said prongs be
ing recessed on at least one of their edges ad
jacent their ends, longitudinal guides on said
compressor, slidable latches having upper'and
lower marginal end ?anges embracing said guides 60
and an intermediate portion extending laterally
between said guides, said latches being movable
into position over said pr'ongs, and means on said
latches to detachably engage said recesses to fric
tionally hold said latches in position over said
I prongs.
DANIEL A. BRENNAN.
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