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Патент USA US3023003

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Feb. 27, 1962
A. A. CROSSKEY ET AL
3,022,996
FOLDING MACHINES
Filed Sept. 2l, 1959
4 Sheets-Sheei‘I 1
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Feb. 27, 1952
A. A. cRossKEYl ET AL
3,022,996
FOLDING MACHINES
Filed Sept. 2l, 1959
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Feb. 27, 1962
A, A, CROSSKEY ET AL
3,022,996
FOLDING MACHINES
Filed Sept. 2l, 1959
4 Sheets-Sheet 3
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INVENTORS
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States Patent Ü
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3,022,996
Patented Feb. 27, 1962
2
means whereby a pressure build up between two co
3,022,996
FÜLDHNG MACHENES
Albert A. Crosskey, Croydon, and John 0. Crabtree,
Caterham, England, assignors to 3.0.(3. Engineers Lim
ited, Caterham, Snrrey, England
Filed Sept. 2l, 1959, Ser. No. 841,321
Claims priority, application Great Britain Sept. 22, 1958
7 Claims. (Cl. 270--76)
operating parts will not result in damage.
According to the present invention there is provided a
folding mechanism comprising two co-operating parts be
tween which the material to be folded will pass, at least
one of the parts being mounted in movable bearings, a
piston coupled to the movable part, an electrically oper
ated control valve for the piston actuating ñuid and a
switch located in the path of cam means movable by
This invention is concerned with improvements in or 10 the movable part whereby upon movement of that mem
ber over a predetermined distance, the switch will be
fed folding machines in which a web is folded, cut and
actuated by the cam means to operate the control valve
delivered or other form o-f delivery.
in a manner to feed fluid or air to the piston to assist the
In a known folding machine the web of paper from
continued movement of the movable part.
the printing unit enters the folding machine at the top 15
Further features and adv-antages of the present inven
of the triangular “former” and is fed by passing over a
tion will appear from the following description of some
serrated roller. The “former” plate is inclined at an
embodiments of the invention, given by way of example
angle to the vertical and is tangential to the serrated roller
only, reference being had to the accompanying drawings
at its top. its object is to put the first fold down the
in which:
back of a newspaper or magazine by turning each half 20 ’ FiGURE 1 is a section through the bearing of a cutting
of the web of paper through 90°. Guide bars or bending
cylinder of a web fed folding machine,
rollers bring the two sides of the copy together. The
FIGURE 2 is a diagrammatic view of folding rollers
folded web is then passed between one or two sets of
of ya web fed folding machine,
drawing rollers which are running at a speed slightly in
FlGURE 3 is a diagrammatic View of the guides for
relating to printing machines and more particularly web
excess of the web speed, thereby pulling the paper easily 25 the paddles of a web fed folding machine, and
over the “formera” in other types of known folding
FIG. 4 shows the circuit system of the machine.
machines, not having a triangular “former” or serrated
Referring to FIGURE l eachof the reduced ends l
roller the paper from the printing unit enters the folding
of the cutting cylinder is carried in a bearing, generally
machine, after it has been slit into a number of ribbons,
indicated at 2, mounted in a rectangular bearing housing
by passing over turner bars which turn the direction of 30 3, itself movable in a bearing block 4. The location of
the web through 90° and then the separate ribbons pass
the cutting cylinder with respect to the folding cylinder
between one or two sets of drawing rollers which are
with which'it co-operates, is controlled by a piston (not
again running at a speed slightly in excess of the web
shown) at each end of the cutting cylinder in an air
speed. The once folded web in the case of the first
cylinder 5, each piston being coupled to the adjacent
arrangement or multiple ribbons in the second arrange 35 bearing housing. Carried by the bearing housing is a
cam 6 in the path of which lies a micro switch 7 carried
ment then pass between a pair of cylinders, namely the
cutting cylinder and the folding cylinder, the cutting
by the bearing block. In the event that pressure builds
cylinder carries one, two or more knives o-r cutters.
up between the cutting cylinder and folding cylinder, the
In
the case of two cutters, these are set diametrically opposite
cutting cylinder will move away from the _folding cylinder
one another, the distance between each cutter round the 40 against the action of the piston until the cam actuates
cylinder being equivalent to one newspaper o-r magazine
the micro switch when an electrically operated air control
in length.
valve of known type as shown in FiG. 4 will reverse the
The folding cylinder is fitted with needles, cam oper
air supply to the air cylinder so that the piston will now
ated in such a way that they take the ribbon just prior
act in the same sense as the parting pressure acting on
to its being cut, carry it round the folding cylinder and
the cutting cylinder. A solenoid 30 is energized by the
then release the copy into the folding machine.
micro switch allowing air to enter the port 31 and move
This tucking operation is facilitated by a second piece
the slider 32 to the position shown, when air can pass
of mechanism carried in the` folding cylinder which causes
thro-ugh ports 33‘ and 34 to the air cylinder 5, ports 3S
a blade to protrude from the surface of the cylinder at
and 36 acting as exhaust for this air cylinder. On resetting
the appropriate moment at a point midway between the
the valve by means of switch 39 the solenoid 30 is de
ends of the copy and tuck it between folding rollers.
energized at the same time as the solenoid 37 is energized
The folding rollers consist of two rollers usually spring
allowing air to enter the port 38 and move the slider
loaded, running at a surface speed in excess of the paper
32 to its original position in which air passes through
speed, their `object being to put the second fold in the
ports 33 and 35 to the air cylinder 5, ports 34 and 40 act
copy. ln the case of the first arrangement or the first 55 ing as exhaust in this case for the air cylinder. rthereby
fold in the case of the second arrangement the copy is
the pressure build up will be stopped. It is possible that
then guided by means of delivery guidesrinto delivery
should a copy become detached from the needle points
paddles. The object of the paddles is to slow down the
in the folding cylinder before the needles are withdrawn
fast moving copy as it is delivered from the folding rollers
in
the normal coursev of events, a jam occurring between
60
and lay it neatly onto delivery belts.
the folding rollers will cause the folding rollers to part
During normal running of a folder, jams are likely to
more than a predetermined amount of movement neces
occur with serious consequences at
sary for their correct functioning.
Referring now to FIGURE 2 the folding rollers are
(a) the gap between the cutting and folding cylinders
(b) in the folding rollers, and
65 shown at 10 and 11, the roller 10 being fixed and the
(c) in the guides below the folding rollers adjacent to
the paddles.
Accumulation of paper at any of these points very
quickly builds up a pressure between the various com
roller 11 mounted in movable bearing housings 12.
Each bearing housing is normally urged toward the roll»
er 10 by a piston (not shown) in an air cylinder 13 se
cured to the frame. Adjustment of the gap between
the rollers may be made by hand wheels 14. Beneath
ponents, forcing them apart with consequential damage. 70 each air cylinder is a micro switch 15 and actuated by
lt is the object of the present invention to provide
the bearing housing is a cam 16.
Should excess move
'3,022,996
ment of the roller 11 occur the cam will actuate the
micro switch to reverse the air supply with respect to the
piston and result in the piston now assisting to part the
rollers for example up `to 5/a inch.
A jam may occur at the guides below the folding roll
ers adjacent the paddles by a copy failing to go into the
paddle ñngers properly and following copies forming
a wad behind it. This wad of paper can occur very rap
idly when a folder is running at speeds of 20,000 copies
per hour upwards.
Referring to FIGURE 3 the guides comprise a plu
rality of parallel members 20 mounted upon two bars
21 and 41.
4
pass, a ñuid actuated piston co-operating with at least
one of said parts to retatin that part during operation in
proper relationship relative to the other, an electrically
operable valve in a ñuid supply line having connections
to either side of said piston, switch means operable to
open and close an energizing circuit for said valve, and
a cam movable by said piston controlled part, said switch
means lying in the path followed by saidcam upon move
ment of said part beyond a predetermined distance as ef
10 fected by a choke between the parts, said valve means
At at least one end the bars carry an L
shaped link 22 which projects away from the paddles,
pivotally coupled to each link 22 are parallel links 23,
24. The link 23 remote from the paddles is secured to a
in response to operation of said switch applying iluid
from said supply line to that side of the piston which will
result in that part, moved by the choke, being urged in
a direction away from the other part to relieve said
choke.
3. A mechanism according to claim 2 wherein at least
To
one part is a roller mounted on movable bearings, the
the arm 27 is coupled a double acting piston (not shown)
piston being coupled to said bearings and the cam being
fast with said bearings.
cross shaft 25 carrying a cam 26 and an arm 27.
in an air cylinder 28. lf pressure build up occurs tend
4. A mechanism according to claim 2 wherein said
ing to urge the guides away from the paddles, the guides 20
movable part is a guide bar mounted on a parallel link
Awill move with parallel motion, by-virtue of links 23 and
age, said cam being connected to said linkage.
Z4, away from the paddles and the cam will be moved
by the cross shaft 25 until it actuates the micro switch
to cause the air supply to act on the piston to urge the
5. A mechanism according to claim 4 wherein the
linkage comprises a pair of parallel arms pivotally mount
guide away from the paddles. Preferably the micro 25 ed on a frame member at their lower ends, an arm cou
pling the upper ends of said parallel arms fast with the
switch will operate upon l?ß inch movement of the guides
guide bar, and a cross shaft secured to the parallel arm
away from the paddles.
remote from the guide bar, said> cross shaft carrying said
What is claimed is:
cam` and coupled by an arm to said piston.
1, A folding mechanism for processing foldable sheet
material, said mechanism comprising two co-operating 30 6. A mechanism according to claim 5 wherein a
spring is coupled between >the frame and the parallel
parts for passing the material to be processed therebe
arms to bias the guide bar towards the other co-operat
tween, bearing means mounting one of said parts moving part in normal operation.
able in reference to the other, pressure operated reversi
7. A mechanism according to claim 2 wherein adjust
ble drive means coupled to said movable part and nor
ment means are provided for varying the distance be
mally moving the said part toward the other, control
tween the two cci-operating parts, said adjustment means
means «3o-acting with said drive means to reverse the
being arranged to vary the position of the piston.
same for moving said movable part into the direction
away from said other part», and actuating means for ac
tuating said control means controlled by> said movable
part moving away from said other part in response to 40
pressure caused by an excessive accumulation of said
material at said parts.
2, A folding mechanism comprising two co-operating
parts between which the material being processed will
References Cited in the ñle of this patent
UNITED STATES PATENTS
1,857,114
2,399,445
Crafts ______________ __ May 3, 1932
Meyer ______________ _- Apr. 30, i946
2,660,426
Griver ______________ _- Nov. 24, 1953
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