IMPROVEMENTS IN APPARATUS FOR CUTTING PAPER WEBS INTO SHEETS, PRINCIPALLY APPLICABLE TO NEWSPAPER PRINTING MACHINES
Year: 1884

page_text: I HENRY GRAFTON of Cannon Street in the City of London, Engineer do hereby
declare the nature of the said invention for IMPROVEMENTS IN APPARATUS FOR
CUTTING PAPER WEBS INTO SHEETS, PRINCIPALLY APPLICABLE TO NEWSPAPER
PRINTING MACHINES to be as follows:-
My Invention relates to cutting apparatus such as used in newspaper printing
machines for perforating the paper web transversely (previous to severing it) or for
completely cutting it into sheets. Such apparatus usually consists of a pair of
cylinders, of which one is furnished with a longitudinal serrated knife and the
other with a groove to receive the points of the knife.
The object of my Invention is to provide a bed to support the paper under the
pressure of the serrated knife in order to ensure its being uniformly perforated or
severed and at same time prevent the paper being forced by the knife into the
groove which is liable to cause the paper to be cut unequally.
My Invention consists in forming a brush-like bed of bristles or fibres so set,
placed, or arranged as to present themselves more or less endwise to the underside
of the paper in order by their natural stiffness to afford.adequate support to the
paper and yet yield to the penetration of the knife points.
One way of arranging the bristles would be to set them in two, parallel rows of
tufts or "knots" inclined towards and meeting one another.
Or the bristles may
be parallel and may be more or less closely packed together and retained by a lateral
yielding pressure afforded by springs or equivalent means.
Or the bristles may be
presented in a direction more or less parallel to the surface of the paper and may
be stiffened by springs. In either case the bristles or fibres may be combined
with metallic wires, or wires may be in some cases wholly substituted for bristles
or fibres.
The bed whether composed of bristles, fibres, or wires may be contained within
the groove of the cylinder above referred to, or may be carried by any other suitable
support in a groove or otherwise.

page_text: I, HENRY GRAFTON of Cannon Street, in the City of London, Engineer do
hereby declare the nature of the said invention for "IMPROVEMENTS IN APPARATUS
FOR CUTTING PAPER WEBS INTO SHEETS, PRINCIPALLY APPLICABLE TO NEWSPAPER
PRINTING MACHINES," and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My Invention relates to cutting apparatus such as used in newspaper printing
machines for perforating the paper web transversely (previous to severing it) or for
completely cutting it into sheets. Such apparatus usually consists of a pair of
cylinders, of which one is furnished with a longitudinal serrated knife and the
other with a groove to receive the points of the knife.
The object of my Invention is to provide a bed to support the paper under the
pressure of the serrated knife in order to ensure its being uniformly perforated or
severed and at the same time prevent the paper being forced into the groove by
the knife which is liable to cause the paper to be cut unequally.
My Invention consists in forming a brushlike bed of bristles or fibres so set,
placed, or arranged as to present themselves more or less endwise to the underside
of the paper in order by their natural stiffness to afford adequate support to the
paper and yet yield to the penetration of the knife points.
Reference is to be had to the accompanying drawings forming part of this
specification wherein,
Figure 1 is a cross section of the portion of the pair of cylinders containing the
knife and its bed, and Figure 2 is a longitudinal sectional elevation with one of
the packing strips removed showing the knife penetrating the bristle bed.
These drawings show the preferred mode of arranging the bristles but I do not
limit myself thereto as they may be otherwise arranged as hereafter specified.
A is the knife cylinder and B the bed cylinder, C is the knife fixed in a longi-
tudinal groove of the cylinder A, in the usual or any other suitable manner the
teeth of the knife being of the usual or any other suitable form and gauge.
D is the bristle bed formed of a single row of tufts or "knots" of bristles drawn
into a holder or back E in the ordinary manner of making a brush.
This bed is located in a groove of the cylinder B in position to meet the knife at
each revolution, the bristles being so arranged as to present themselves as nearly
as possible end wise to the points of the knife.
In the drawing the bristles are shown radial to the cylinder B and therefore
first meet the knife at a slight angle but they might be set at such an angle to the
radial line as to present themselves more directly end wise to the knife at the
moment of meeting it if preferred.
The holder or back E is shown fixed in a groove of cylinder B the bristles being
supported laterally by packing strips F the ends of the bristles only being exposed.
The packing strips may be of unyielding material provided the compactness of
the bristles and work of the bristle bed be such as to afford the necessary freedom
for the angular motion of the knife within it, or they may if necessary be made
of an elastic material such as india rubber or of rigid strips backed up by springs.
The ends of bristles need not however be flush with the packing strips as shown
but may project sufficiently to afford the necessary elasticity. I do not limit
myself to a narrow bed as herein shown but may extend the width of the bed
through any arc of the circumference of the cylinder desired and may so gear the
cylinder as to cause the knife to meet the bed at a slightly different point at each
revolution.

page_text: The bristles of which the bed is formed are preferably animal, but vegetable
fibres, metal wires or a combination thereof may be used.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed I declare that what
I claim is:-
In a cutting apparatus for perforating or severing a paper web, a knife bed
composed of bristles or fibres, so set, placed, or arranged as to present themselves
about end wise to the underside of the paper in the manner and for the purpose
herein specified.
2nd In a cutting apparatus for perforating or severing a paper web, the com-
bination with a serrated knife of a bed composed of bristles or fibres set or arranged
substantially in the manner and for the purposes herein specified.