IMPROVEMENTS IN APPARATUS FOR FOLDING AND DELIVERING SHEETS OF PAPER AND OTHER MATERIALS
Year: 1882

page_text: LETTERS PATENT to Frederik Wolff, of the International Patent Office,
Copenhagen, Denmark, Patent Agent, for an invention of IMPROVEMENTS
"
IN APPARATUS FOR FOLDING AND DELIVERING SHEETS OF PAPER AND OTHER
MATERIALS." A communication by Johan Gottfried August Eickhoff, of
Copenhagen, Denmark.
PROVISIONAL SPECIFICATION left by the said Frederik Wolff at the
Office of the Commissioners of Patents on the 27th February 1882.
FREDERIK WOLFF of the International Patent Office, Copenhagen Denmark,
Patent Agent "IMPROVEMENTS IN APPARATUS FOR FOLDING AND DELIVERING
SHEETS OF PAPER AND OTHER MATERIALS (A communication by Johan Gottfried
August Eickhoff of Copenhagen Denmark)
"
In suitable framework are arranged an upper and a lower spindle which by tooth
wheel or other gear are caused to rotate together, the former spindle carries a
knife blade shaped folder, and the latter spindle carries plates or brackets forming
bearings for two rollers which are close to each other and are geared with each
other and with a stationary wheel (by preference with internal teeth) mounted on
the aforesaid lower spindle; when this latter revolves the brackets mounted thereon
will revolve therewith and by the internally toothed wheel cause the rollers to
revolve also around their axes. The motion connection between these parts might
be by friction wheels or by straps or other suitable means instead of by tooth
gearing
The knife shaped folder is so placed that it can pass well down between the two
rollers without however touching them. The sheet to be folded is while the folder
and the rollers are distant from each other brought between them and by the
turning of the spindles pressed between the rollers by the folder, taken hold of by
the rollers folded and carried along.
One of the rollers has a cross bar moving therewith. There is also a stationary

page_text: cross bar. In the moment that the folder touches the sheet the folder is between
these two cross bars which serve to render the folding sharp or definite.
In order to apply the apparatus to automatic delivery of the folded sheet the
latter is carried round the foremost roller whence it is delivered when the latter
roller is below the lower spindle
The relative speeds and directions of motions of the parts are such that the
folded sheet is quickly dropped by its own weight from the roller or while the
latter is almost at rest. There are bands or other guides for guiding the folded
sheet. Instead of the one delivery roller there may be two. The sheets inay
drop on a stationary table or on a moving endless table or band. The delivery
to the table may be effected by other heretofore known means than those
described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederik Wolff in the Great Seal Patent Office on the
25th August 1882.
FREDERIK WOLFF of the International Patent office Copenhagen Denmark,
Patent Agent "IMPROVEMENTS IN APPARATUS FOR FOLDING AND DELIVERING
SHEETS OF PAPER AND OTHER MATERIALS (A communication from Johan
Gottfried August Eickhoff of Copenhagen Denmark)
"
A machine constructed according to this invention is represented on the accom-
panying drawing. Figure 1 being a vertical transverse section showing the
apparatus in the position just before folding. Figure 2 a similar view of the
apparatus while folding, and Figure 3 a similar view while delivering.
In suitable framework are arranged an upper spindle a and a lower spindle b
which by tooth wheels c and d or other gear are caused to rotate together, the
former spindle a carries a knife blade shaped folder f and the latter spindle b
carries plates or brackets g. g g forming bearings for two rollers i and h which are
close to each other and are geared with with each other by the tooth wheels k, l, the
wheel also gears with a stationary wheel m (by preference with internal teeth as
here shown) mounted on the aforesaid lower spindle b; when this latter revolves
the brackets g mounted thereon will revolve therewith and by the internally
toothed wheel m cause the rollers i and to revolve also round their axis in the
direction indicated by the arrows. The motion connection between these parts
instead of being by the internal tooth wheel m might be by a tooth wheel with
outer teeth gearing with the wheel i or by friction wheels or by straps or other
suitable means instead of by tooth gearing k, land m.
The knife shaped folder f is so placed that when the spindles a and b revolve it
can pass well down between the two rollers i and h without however touching
them and. so that its knife f in the position shown at Figure 2 comes near the line
of contact between the said rollers. The sheet to be folded indicated by the letters
p. p. p is while the folder and the rollers are distant from each other as shown at
at Figure 3 brought between them and by the turning of the spindles pressed
between the rollers i and Figure 2 by the folder, taken hold of by the roller i
and h folded around the foremost of them and carried along on the roller opposite
the spindle b.
The roller h has a cross bar n moving therewith. There is also a stationary cross
bar o.
In the moment that the folder touches the sheet the folder is between
these two cross bars which serve to render the folding sharp or definito.
When considering the motion of the sheet at the point & Figure 3 where it parts
from the roller h it will be seen that it is composed of two movements one pro-
duced by the roller h in the direction of the short arrow Figure 3, and another
movement in the opposite direction which is derived from the rotation of the
spindle b and is indicated by the long arrow. The absolute motion of the sheet
at this point results from the difference between the said two motions.
In order to apply the apparatus to automatic delivery of the folded sheet where
the latter is carried round the foremost roller whence it is delivered when the latter
roller is below the lower spindle, the aforesaid difference is by suitable speed of
rotation of the roller h made very small or nil.
The relative speeds and directions of motions of the parts are therefore such that
the folded sheet is quietly dropped by its own weight from the roller h or while
the latter is almost at rest and the delivery is thus exact even by great speed
of the machine. The folding is done by such a position of the spindles & and b

page_text: g
that the end of the sheet can drop quietly from the folding roller on to the delivery
table 9 Figure 3. There are bands for guiding the folded sheet round the roller h
as indicated by long dotted line; these bands pass over the rollers i, h, t and u
and back again to i. Instead of bands guide bars or other guides may be used.
Instead of the one delivery roller h there may be two. The sheets may drop on a
stationary table g or as indicated in dotted lines at Figure 3 on a moving
endless table or band v, which moves at such a rate that the surface of the
delivered heap remains at a constant height. The sheets delivered on the table
will thus not fill it too much, they will always drop the same distance, and this
distance may be very small. The dotted lines x Figure 3 indicate the slanting
surface of the heap so formed.
Delivery can also be effected without connection with the folding, the sheets
being then introduced between rollers heretofore mentioned, as used for folding or
otherwise brought to the delivery roller and treated as described.
I claim as the invention communicated to me substantially as hereinbefore set
forth.
First The folding of paper, and other sheets by the insertion of a rotary knife
or folder between two rollers which have a revolving motion round their axes for
carrying along the sheet and also a rotary motion round a fixed axis, and
corresponding with the rotation of the knife.
Second-The combination with the said rollers of a bar rotating with them
around the fixed axis, which bar at the moment, when the sheet is touched by
the edge of the folder is situated in front of the latter, but on the opposite side
of the sheet, and of another but fixed bar, which at the saine moment is situated
behind the folder and also on the side of the sheet opposite to the folder.
Third The application of the said apparatus to delivery with or without
previous folding the sheet being carried by a roller having the double rotation at
Claim 1, that is a rotation around a fixed axis, as well as around its own axis, the
said rotations being in such directions that the absolute motion of that point of the
roller at which the sheet leaves it, is always equal, or nearly equal to the difference
between the motions, which the said point receives from the two rotations.
In Witness whereof 1 the said Frederik Wolff have hereunto set my hand
and seal this Twenty first day of August in the year of our Lord One
thousand eight hundred and eighty two.