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Патент USA US3057631

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Oct. 9, 1962 '
D, R. KLAUS
3,057,621
PAPER FOLDING APPARATUS
Filed Nov. 18, 1960
3 Sheets-Sheet 1
Fig./
58
60
.90
(1
Donald R. Klaus
'
1N VEN TOR.
BY M/WE/“ém,
Oct. 9, 1962
D. R. KLAUS
3,057,621
PAPER FOLDING APPARATUS
Filed Nov. 18, 1960
3 Sheets-Sheet 2
/0
24
Donald R Klaus
INVENTOR.
BY 2mm
Oct. 9, 1962
D. R. KLAUS
3,057,621
PAPER FOLDING APPARATUS
Filed Nov. 18, 1960
3 Sheets—Sheet 3
/0
F793
/2
24
\
/
K
34
Fly-9
20
I Donald R. Klaus
1N VENTOR.
BY WWW
United States Patent O??ce
2
1
invited to the illustration in FIGURE 2 wherein the paper
folding apparatus is generally referred to by reference
3,057,621
PAPER FOLDING APPARATUS
Donald R. Klaus, Rte. 3, St. Mary’s Church,
Wakeman, Ohio
Filed Nov. 18, 1960, Ser. No. 70,363
7 Claims. (Cl. 270-68)
The present invention relates to novel apparatus for
folding paper.
It is a primary object of this invention to provide ap
paratus which will fold individual sheets of paper from
a stack of sheets of paper loaded thereinto in a more
efficient, positive and reliable manner than was hereto
fore possible.
3,057,621
Patented Oct. 9,’ 1962
numeral 10. It will be understood that the apparatus .10
may be mounted on a frame 12 of a larger paper handling
Or
machine with which it may be associated. Accordingly,
the machine includes a pair of delivery chutes 14 and 16
into which the folded paper is delivered. The accordion
type of folded paper is delivered to delivery chute 114
whereas the double type of folded paper is delivered to the
delivery chute 16 as shown by dotted line in FIGURE 3.
FIGURE 2 shows in dotted line an accordion type of fold
ed paper 18 being delivered to chute 14 which folded sheet
of paper is more clearly shown in vFIGURE 8. The
double folded sheet of paper 20 as shown being delivered
15 in FIGURE 3 is more clearly illustrated in FIGURE 9.
It will also be observed that the folding apparatus is sup
Another object of this invention is to provide a paper
plied with a stack of unfolded sheets of paper, which is
folding apparatus which produces both a primary fold
disposed within a hopper loading portion 24 of the ap
on each sheet of paper and by selective positioning there
paratus. The apparatus 10 also includes initial folding
of may produce different types of secondary folds.
An additional object of this invention is to provide a 20 and feeding mechanism generally referred to by reference
numeral 26 which is disposed below the stack of papers
paper folding apparatus which is more reliably operative
to receive successive sheets of paper for folding thereof
by virtue of a novel relationship between a feeding set of
rollers and a ?nal folding set of rollers with the feeding
rollers being automatically disconnected from their drive
when the folded sheet of paper passing therethrough is
engaged by the ?nal folding rollers, the drive connection
being restored to the feeding rollers when the folded sheet
of paper is completely withdrawn therefrom.
A still further object of this invention is to provide a
selectively positioned secondary fold producing mecha
nism cooperating with the ?nal primary folding mecha
nism so as to form either double type of secondary folds
on the sheet of paper or accordion type of secondary
folds.
These together with other objects and advantages which
will become subsequently apparent reside in the details of
22 and in contact therewith.
Also mounted on the
machine frame 12 and disposed below the feeding mecha
nism 26 is the ?nal primary folding mechanism gen
erally referred to by reference numeral 28. Selective
ly positioned below the ?nal primary folding mechanism
28 is a secondary folding mechanism generally referred to
by reference numeral 30. It will be apparent from FIG
URES 2 and 3 that the bottom sheet of paper in the
stack of papers 22 will ‘be received by the feeding mecha
nism 26 and passed therethrough into engagement with the
?nal primary folding mechanism 28, which primary fold
ing mechanism 28 cooperates with the secondary folding
mechanism 30 to form the secondary fold and deliver the
completely folded sheet of paper 18 or 20 into the
delivery chute 14 or 16.
The feeding mechanism 26 includes a pair of folding
rollers 32 and 34 which are in frictional contact with
each other and rotatable in opposite directions as indi
cated by the arrows in FIGURES 2 and 3. It will be
40
panying drawings forming a part hereof, wherein like
noted that the rollers are rotatably mounted in the frame
numerals refer to like parts throughout, and in which:
12 on axes which are ?xed and disposed in spaced parallel
FIGURE 1 is a top plan View of the paper folding ap
relation
to each other. It will also be noted that the
paratus of this invention.
bottom sheet of paper in the stack of papers 22 is in
FIGURE 2 is a sectional view taken substantially
through a plane indicated by section line 2-2 in FIGURE 45 contact with the outer surface of both rollers 32 and 34
so that it may be engaged thereby for forming a loop in
1, illustrating the apparatus with the secondary folding
the paper and feeding the loop between the rollers. The
mechanism in one selected position for producing an ac
construction and operation as more fully hereinafter de
scribed and claimed, reference being had to the accom
initially folded paper is therefore fed downwardly be—
tween the rollers until it is engaged between a pair of
URE 2 but illustrating the secondary folding mechanism 5,0 rollers 36 and 38 of the ?nal primary folding mecha
nism 28. From FIGURES 1 and 3, it will be observed
in another selected position for producing a double type
that each of the rollers is formed of a central shaft por~
secondary fold.
tion. The roller shafts 40, 42, 44 and 46 accordingly
FIGURE 4 is a sectional view taken substantially
have mounted thereon resilient material such as rubber.
through a plane indicated by section line 4—4 in FIG
55 It will be observed from FIGURES 1 and 3 in particular,
URE ,1.
that the resilient material 48 has a corrugated external
FIGURE 5 is a sectional view taken substantially
surface and is made of softer material than the harder
through a plane indicated by section line 5-—5 in FIG
smooth surfaced resilient material of which the rollers 34,
URE 1.
36 and 38 are made. It will become apparent that the
FIGURE 6 is a partial top- plan view showing a differ
feeding mechanism 26 including the corrugated surface
ent form of clutch mechanism from that illustrated in
roller 32 while effective to more readily grip the paper in
FIGURES 1 and 5.
contact therewith for feeding thereof through the feed~
FIGURE 7 is a sectional view taken through a plane
ing mechanism 26 will not be capable of producing the
indicated by section line 7-7 in FIGURE 6.
sharp ?ne fold or crease that is desired by virtue of the
FIGURE 8 is a perspective view of a folded sheet of
softness or pliable nature of the material 48 of the feed
paper with an accordion type secondary fold as produced
roller 32. Accordingly, the ?nal primary folding mecha
in accordance with this invention.
nism 28 by virtue of the harder material of which the
FIGURE 9 is a perspective view of a folded sheet of
rollers 36 and 38 are made, will produce the sharp, ?ne
paper with a double type secondary fold produced in ac
crease in the paper initially formed by the feed mecha
cordance with this invention.
FIGURE 10 is a partial perspective view of a single 70 nism 26.
It will be recalled, that the pairs of rollers of each of
fold sheet of folded paper.
the mechanism 26 and 28 are rotated in opposite direc
Referring now to the drawings in detail attention is ?rst
cordion type of secondary folds.
FIGURE 3 is a sectional view similar to that of FIG
3,057,621
‘D
tions with those rollers vertically aligned with respect to
each other being rotated in the same direction so that the
paper folding may properly proceed between the mecha
nisms 26 and 28. Accordingly, a drive gear member 50
is rotatably mounted in the frame 12 and ?xed to shaft
52 to which rotation may be imparted by any suitable
source of power.
4
position illustrated in FIGURE 1 for which reason the
shock absorbing bumper element 82 is provided in order
to positively limit such relative rotation when the bumper
element 82 contacts the projection 78 on the roller
shaft 42.
From the foregoing, it will be apparent that the feed
ing mechanism 26 ordinarily or initially driven by the
The gear member 50 meshes with pinion gears 54 and
gear 54 will be automatically released therefrom when it
56 operatively connected to rollers 34 and 38 respectively,
is caused to rotate relative thereto by the faster rotating
which pinion gears 54 and 56 are disposed at one axial 10 mechanism 28 operating through the folded sheet of paper
end of the rollers with which they are associated. Ac»
cordingly, as seen in FIGURES 2 and 3, the pinion gears
which extends between the mechanisms 26 and 28. As
a result thereof the mechanism 26 will not be power
driven by the gear 50 so that the paper may be pulled
54 and 56 are driven simultaneously in a clockwise direc
tion by the gear member in order to impart clockwise
therethrough and finally folded by the mechanism 28
rotation to both rollers 34 and 38. As hereinbefore 15 in a more positive manner. Accordingly, the paper will
indicated, the ‘rollers 32 and 36 respectively associated
under no circumstances be wrinkled and improperly fed
with rollers 34 and 38 are rotated in a counterclock
through the mechanism.
wise direction. Accordingly, as more clearly seen from
It will be observed that the stack of papers 22 is
FIGURES 1 and 4, intermeshing pinion gears 58 and
loaded into the hopper device 24 which includes a down~
60 are connected respectively to the shaft portions 40 20 wardly angled bottom portion 84. Accordingly, the
and 42 of the rollers 32 and 34 in order to effect the
stack of paper 22 is properly conditioned for reception
indicated directions of rotation. Similarly, pinion gears
by the feeding mechanism 26. In connection with the
62 and 64 are connected to roller shafts 44 and 46 of
above, the pressure applying roller device 86 is pro
the rollers 36 and 38 for effecting opposite directions of
vided and slidably mounted within the frame 12 and is
rotation thereof. It will, however, be noted that the gear 25 disposed in offset relation with respect to the mechanism
50 which meshes with the pinion gears 54 and 56 for
26 and more particularly disposed above the roller 32.
imparting drive to the feeding mechanism 26 and ?nal
Accordingly, the bottom sheet of unfolded paper will
primary folding mechanism 28 will rotate the mecha
be placed in pressure feeding contact with the more
nism 28 at a slightly higher speed than that of the mecha
pliable corrugated surface 48 for reliably feeding paper
nism 26 inasmuch as the number of teeth on the pinion
through the feeding mechanism 26. As heretofore in
gear 56 is less than the number of teeth on the pinion
dlcated, the mechanism 26 will be power driven to feed
gear 54. Accordingly, when the sheet of paper is en
the paper and initially fold it until it is engaged by the
gaged between the rollers 36 and 38 of the mechanism 28
?nal primary folding mechanism 28 at which time the
and has not as yet been withdrawn from between the
power drive to the feeding mechanism 26 will be disen
rollers 32 and 34 of the mechanism 26, provision must 35 gaged by the aforementioned operation of the clutch
be made enabling the rollers 32 and 34 of the mecha
mechanism 66.
nism 26 to be rotationally displaced with respect to the
Referring now to FIGURES 6 and 7, ‘another form of
pinion gear 54 which otherwise drives the feeding mecha
clutch mechanism is illustrated. In this latter form of
nism 26. Accordingly, a clutch mechanism generally
clutch mechanism, the pinion gear 54 has a hub 88 which
referred to by reference numeral 66 is operatively dis 40 is rotatable with respect to the roller shaft 42. A
posed between the pinion gear 54 and the roller 34 for
multi-coil spring 90 is provided on the shaft 42 between
accommodating the necessary relative rotational move
the end of the roller 34 and the‘hub 88 with the ends
ment that will be effected between the rollers 32 and
of the coil spring 90 being respectively anchored with
34 of the feed mechanism 26 and the pinion gear 54.
in the hub 88 and the roller 34. Accordingly, when
Referring therefore to FIGURES 1 and 5 in particular, 45 the roller 34 is rotated in one direction relative to the
it will be observed that the clutch mechanism 66 includes
pinion ‘gear 54 and hub 88 thereof, the coil spring 90
a hub sleeve 68 which is rotatably mounted on the shaft
portion 42 ‘of the roller 34. One end 70 of a coil spring
72 is ?xed to the hub 68 by means of a fastener element
74 while the other end 76 of the coil spring 72 is en
gaged by a projecting pin 78 ?xed to the shaft portion
42 at that end thereof projecting beyond the resilient
roller portion of the roller 34. It will also be observed
will be expanded in order to accommodate relative ro
tation. However, when the gear 54 tends to rotate rela
tive to the roller 34, the coil spring 90 will be contracted
to eventually render a rigid drive connection between
the gear 54 and the roller 34. In connection with the
above, it will be understood that other suitable and
equivalent forms of one-way drive mechanisms may be
that the hub sleeve 68 has ?xed thereto an axially pro
utilized in place of the mechanism 66 in order to per
jecting pin 80 with a resilient bumper element 82 mounted 55 form the indicated function thereof.
thereon. Accordingly, when the roller 34 is driven faster
Referring now to FIGURES 2 and 3, it will be ob
than the gear 54 by virtue of the engagement of the
served that the secondary folding mechanism 30 includes
sheet of paper by the faster rotating rollers of the mecha
nism 28 before the paper is withdrawn from the feeding
mechanism 26, relative rotation between the roller shaft
42 and the gear ‘54 will be compensated for by the coil
spring 72 being disengaged from the pin 78 on the roller
shaft 42. When the roller 34 is not being driven by
the paper pulled therefrom by the mechanism 28, the
gear 54 tending to rotate faster than the roller shaft 42
will cause the spring coil end 76 to engage the pin 78 on
the roller shaft 42 and drive the roller through the coil
spring 72. It will also be apparent that after the roller
34 is released upon complete withdrawal of the paper
from the mechanism 26, there will be a certain amount
of rotational movement between the pinion gear 54 and
the roller shaft 42 before the coil spring end 76 engages
the projecting pin 78 on the roller shaft 42. According
ly, the shock load will cause the gear 54 to be rotationally
displaced with respect to the roller shaft 42 beyond the
a casing member 92 which is pivotally mounted on a
?xed ‘axis by means of pin 94 for selective positioning
60 thereof between the position illustrated in FIGURES 2
and 3. Rotatably mounted at the upper end of the
mechanism 30 is a secondary folding roller 96 which
frictionally engages either the roller 36 or the roller 38.
The secondary folding roller 96 is rotatably mounted
65 by a member 98 disposed within the casing member 92
'and slidable with respect thereto against the bias of
spring element 100. It will be observed also, that com~
partment spaces 102 and 104 are formed between the
walls of the facing member 92 and the inner member
70 98 on both sides thereof. The bottoms of the compart
ments 102 and 104 are de?ned by a bottom member
106, the position of which may be varied by means of
the adjustable screw mechanism 108.
Accordingly, a
folded end portion of the paper in which the primary
75 fold has been made may be fed into the compartment
3,057,621
5
6
of a pair of coacting feed rollers adapted to buckle a
paper sheet therebetween, a pair of coacting folding roll
102 for example as shown in FIGURE 2 from the ?nal
folding mechanism 28. The depth of the compartment
will be appropriately predetermined by the mechanism
108 for properly accommodating the folded end of the
ers adapted to receive a buckled sheet from said feed
rollers and to crease the same along a ?rst fold line
with one folded side of the sheet being wider than the
other, means for driving said feed rollers and said folding
paper. Continued feeding of the sheet of paper through
the mechanism 28 will form a loop therein which will
be fed ‘between the roller 38 of the mechanism 28 and
rollers, a carrier movably mounted adjacent said folding
rollers, a third folding roller supported by said carrier
and engageable selectively with one or the other of the
type secondary fold will be produced as the paper is
fed ‘between the rollers 38 and 96 and delivered through 10 rollers in the pair of folding rollers, and a pair of selec
the secondary folding roller 96 whereby an accordion
the delivery chute 14 as seen in 'FIGURE 2. When the
mechanism 30 however, is angularly positioned as shown
in FIGURE 3 with the roller 96 in contact with the
roller 36 a similar action occurs with the folded bottom
half of the sheet of paper being ?rst ‘fed into the com~ 15
tively usable sheet receiving pockets provided in said car
rier at opposite sides of said third folding roller, whereby
to selectively receive a sheet folded along the ?rst fold
line and fold the wide side of the sheet selectively upon
itself or upon the relatively narrow side of the sheet, de
pending upon the position of said movable carrier to
support said third folding roller in engagement with one
or the other of said pair of folding rollers.
fold with the paper then being withdrawn from the com
2. The device as de?ned in claim 1 together with
partment 106 and delivered into the delivery chute 16.
It should also be understood that the mechanism 3i? 20 means provided on said carrier for adjusting the depth
of said pockets.
may be withdrawn from contact with the primary folding
3. The device as de?ned in claim 1 wherein said means
mechanism ‘28 in which case a single ‘fold sheet of paper
for driving said feed rollers and said folding rollers in
will be produced as shown in FIGURE 10'.
clude clutch means for disengaging the drive to the feed
From the foregoing, operation and utility of the type
of folding apparatus "of this invention will be apparent. 25 rollers ‘While a sheet is being folded by said pair of
partment 104 and subsequently pulled between the rollers
36 and 96 for forming a double fold type of secondary
folding rollers.
It will be appreciated that as a result of the difference
in the drive ratio between the gear 50 and the pinion
4. The device as de?ned in claim 1 wherein said means
‘for driving said feed rollers and said folding rollers in
drive gears for the feeding mechanism 26 and the ?nal
clude a rotatable drive element disposed coaxially at one
folding mechanism 28, the one-way drive mechanism ‘66
is rendered effective to discontinue drive to the mech 30 end of one of said feed rollers, and clutch means for
drivingly disengaging said one feed roller from said drive
anism 26 when the folded paper is engaged by the mech
element while a sheet is being folded by said pair of fold
anism ‘28 and until the paper is completely Withdrawn
ing rollers, said clutch means including a resilient coil
from the mechanism 26 at which time power drive to
like member having one end thereof anchored to said
the mechanism 26 will be restored enabling the recep
tion therein and feeding thereof of ya following sheet of 35 drive element, a hook provided at the other end of said
coil-like member, and a projecting pin provided on said
paper. Also, the selectively positioned secondary folding
one feed roller, said pin being drivingly engageable by
mechanism 30 cooperates with the ?nal primary folding
and disengageable from said hook.
mechanism 28 to produce di?erent types of ‘secondary
‘5. The device as de?ned in claim 1 wherein said means
‘folds with the different type of folded papers ‘being auto
matically sorted by virtue of the delivery thereof into 40 for driving said feed rollers and said folding rollers in
clude a rotatable drive element disposed coaxially at one
different delivery chutes. It will be understood that vari
end of one of said feed rollers, and clutch means for
ous types of other mechanisms may be associated with
drivingly disengaging said one feed roller from said drive
the feeding ‘apparatus of this invention for enhancing
element while a sheet is being folded by said pair of fold
and cooperating with the operations thereof. For eX
ample, automatic oscillating ‘mechanism may be opera~ 45 ing rollers, said clutch means comprising a coil spring
having one end thereof anchored to said drive element
tively connected to the mechanism 30 so that accordion
‘and its other end anchored to said one feed roller.
type folded paper and double folded paper will be al
6. The device as de?ned in claim 1 together with means
ternatively delivered to the chutes 14 and 16. Also, [a
rockably and slidably mounting said carrier for movement
predetermined number of accordion folded sheets 18
toward and away from said pair of folding rollers and
may be delivered to chute 14 and then the mechanism
movement from either roller to the other.
30 will be automatically repositioned to deliver another
‘7. The device as de?ned in claim 5 together with resil
predetermined number ‘of double folded type of paper.
ient means biasing said carrier toward the folding rollers.
The foregoing is considered as illustrative only of the
principles of the invention. Further, since numerous
References Cited in the ?le of this patent
modi?cations and changes will readily occur to those 55
UNITED STATES PATENTS
skilled in the lart, it is not desired to limit the invention
to the exact construction ‘and operation ‘shown and de
827,512
Dick ________________ __ July 31, 1906
scribed, and accordingly all suitable modi?cations and
equivalents may be resorted to, falling within the scope
of the invention as claimed.
What is claimed as new is as follows:
1. In a paper sheet folding machine, the combination
60
1,196,697
'Julyan ______________ __ Aug. 29, 1916
1,834,564
1,834,568
Winkler et al. ________ ._.. Dec. 1, 1931
Winkler et a1. _________ __ Dec. 1, 1931
2,080,505
Rader et al ____________ __ May 18, 1937
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