Year: 1899

page_text: I, JOHN MURRAY, 54, Seymour Street, Glasgow, Lanarkshire, Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:
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A machine for folding sections of books in which the fold is made partially by
a pair of revolving discs which I call creasing discs and completed by a pair of
revolving discs which I have named nipping discs. The primary top creasing
dise is fixed on a horizontal shaft above the level of the table of the machine,
and the primary under creasing disc is fixed on a horizontal shaft below the
level of the table.
The sheet or sheets which make up the section to be folded are placed on the
table by the operator against a side gauge so that the line through which the
fold is to be made coincides with the position of the creasing dises and with the
longitudinal centre line of the machine.. The section is pushed by an automatic
movement of the back gauge between the creasing discs."
The top creasing disc forces the paper into a groove in the under creasing disc
and thus partially makes the fold. The crease or fold thus made is guided along
a grooved rail through which it is pushed by the further rotation of the creasing
discs to, and between the nipping discs, which revolve on verticle shafts at the
same periphery speed as the creasing dises. The nipping discs are so made that
their pressure is concentrated at the back or fold of the section to complete the
fold and overcome the elasticity or tendency which the section has to open at
the fold which is a hindrance in the further operations it has to undergo.
By this concentration and endwise rolling of the section this tendency will
be overcome.
If for sections having one fold, the section is discharged by the nipping rollers
into a receiver having suitable means for packing and if further folds are
required this can be accomplished by the multiplication of creasing discs, guide
grooves, and push in movements.
1
1900
JOHN MURRAY, Engineer, 54. Seymour Street, Glasgow. S.S.. do hereby declare
the nature of this invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :—
Machines have heretofore been made for folding book sections by means of a

page_text: horizontal straight knife driving down sheets through a slit in the table to
horizontal rollers which fold and nip the section at once along its entire length.
One of the principal features of the present invention, relates to means by
which the nipping is concentrated at the back or fold of the section and made to
pass gradually from one end of the section to the other.
This invention also relates to various details of construction in the parts of
the machine as hereafter fully set forth.
In the drawing
Fig. 1 is a side elevation of the folding and nipping discs.
Fig. 2, is an end elevation of the folding and nipping discs with the under
folding disc in section to show details of construction.
Fig. 3 is a plan of the folding and nipping discs showing sheets in the position
they will occupy when folding begins.
Fig. 4. is a vertical section thro' shaft H showing the method of adjusting
the nipping discs to suit variations in the thickness or number of sheets to he
folded.
.
Fig. 5 is an end view of the adjusting disc shown in section in Fig. 4. Fig. 6
is a cross section of the shaft on which the nipping discs are supported and
adjusted.
Fig. 7 is a side elevation, showing how the movements of shaft B: on which
the under disc D is fixed, are produced.
The main frame of the machine is of any suitable size and shape and the
shafts shown broken off in the drawings extend from one side frame to the other.
Upon the main frame is a shaft A to which power is to be applied in any
convenient manner and the shaft B on which the under disc D is fixed is geared
to shaft A by spur wheels of equal size. The shaft B is supported at each end in
slide block bearings 40, shown in Fig. 7 and which are flanged to prevent end
motion and are free to move in slots in the side frames of the machine in a
direction at right angles to a line thro' the centres of shafts A and B, when B
is on its full up position.
The
When shaft A is rotated, rotary movement is conveyed to shaft B by toothed
gear wheels shown in outline at 26 and 27. Further on shaft A is a pinion
wheel 28 which gears with the toothed wheel 29 which is fixed on the shaft X.
The shaft X runs in bearings in the side frames. At each side of the machine
on shaft X is a cam 30. 31, a connecting link 33 and a toggle 84, 85, 86.
pin 84 is fixed to the side frames and pin 36 is fixed to the slide block bearings,
which are free to move in their slots. When the greatest diameter of the cam 30
acts on the antifriction roller 32 the slide block bearings are thrust in an
upwardly direction and when the shaft X rotates the low portion of the cam 31
opposite the roller 32 the shaft B will descend to the lower position indicated
by the dotted outline of disc D at 25 on Fig. 1.
Further, shaft A is also geared with the vertical shafts R1 R2 of nipping
dises F&G by skew gears C1 C2 and L1, L2.
The over folding disc E is free to revolve on pin V and is supported from the
main frame by shaft M and hub 0. The disc is capable of being adjusted
vertically by screw N.
On each side of disc Dare concentric compression rings 4 and 5 with a space
between as shown at 6 Fig. 2. The compression rings 4 and 5 are forced towards
each other by springs 7, 8, 9, 10, but the limit of their movement in this direction
is controlled by screws $1 $2 coming in contact with the side of disc D as shown
in Fig. 3.
The spindles 11 and 12 slide freely through a hole in the outer edge of disc D.
The springs at their opposite ends will thus balance each other.
The nipping dises are driven by their shafts R1 R2 which rotate in
brackets K1 K2 which are supported on shaft H.
5
On shaft H keyways are cut on opposite sides as shown in Figs. 4 and 6. It is

page_text: fixed in the main frame of the machine. The sliding keys 13 and 14 are made
to hold the hubs of K 1 & K2 against the pressure of the springs 15 and 16.
The springs are spiral and are coiled around shaft H and are compressed
between the side frames of the machine and hubs on K1 K2. At the side
of the machine next to the operator the ends of the sliding keys are formed
into screws 17 & 18 Fig. 4.
Gear wheels 19 & 20 are fitted on their inside surface with the screws and
mesh with each other on their periphery.
Attached to the gear wheel 20 is an adjusting disc 21 with a handle 22.
It should now be seen that by the rotation of handle 22 the nipping discs F
and G can be made to approach to or retire from each other; and as the screws
and wheels are of equal proportions the discs will be moved equally. The
periphery of disc 21 can be marked so as to indicate the distance between the
peripheries of discs F and G or to indicate approximately the number of sheets
paper for which they are set. Thick sections can thus be made to pass into
the nipping discs F & G without shock or hesitation.
of
The operation of folding a section is as follows:-
The sheet or sheets which make up the section to be folded are placed in
position as shown at a bed Fig. 3 on table T as shown on Figs. 1 & 2 either by
hand or it may be pushed to this position by automatic gauges. The end
gauges F & G Fig. 3 are fixed to the table and are stationary. When the sheets
are being placed disc D is on its lowest position as shown by dotted line at 25.
As it rises to its highest position as shown in Fig. 2 disc E will force the front
edge of the paper into the groove in disc D and as it is so depressed at the middle
the qutside edges will rise above end gauges F & G and the section when gripped
between the peripheries of discs D & E will be free to run through to the nipping
dises F & G which make the partial fold made by D & E permanent & complete.
The folded section is then discharged by disc F & G into a receiver where it is
packed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
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(1) The method herein specified of folding sections by means of a rotary
dise D with a groove and a circular knife shaped disc E substantially as set forth.
(2) In a folding machine for book sections the method herein specified of
making the fold complete and permanent consisting in the nipping of the back
portion of the section only and nipping gradually from one end of the section
to the other substantially as set forth.
(3) The combination with shaft H of the nipping discs F & G with their
means of actuation by skew gears C1 C2 and L1 L2 their supporting brackets K 1
and K2 with springs 15 & 16 the sliding and controlling keys 13 & 14 with
screwed ends 17 & 18 the gear wheels 19 and 20 the adjusting disc 21 sub-
stantially as set forth.
(4) The combination with disc D of compression rings 4 & 5 the spindles 11 & 12
extending through the outer edge of dise D the springs 7, 8, 9, 10, the
screws $1 $2 by which the closed width of the groove is adjusted.
JOHN MURKAY.