Improvements in Paper Making Machines.
Year: 1892

page_text: Date of Application, 23rd Dec., 1892
Complete Specification Left, 23rd Sept., 1893-Accepted, 28th Oct., 1893.
PROVISIONAL SPECIFICATION.
Improvements in Paper Making Machines.
I, ROBERT WIGHTON MONCRIEFF General Manager and Engineer for the
Sparre Patents Company Limited of 53 Sackville Street, Manchester, do hereby
declare the nature of this invention to be as follows:-
This invention consists of improvements in paper making machines and has
special reference to machines of the kind in which a series of laid or wove moulds
are employed hinged or connected together so as to form a continuous or endless
chain of travelling moulds which successively receive the pulp from a pulp box or
other source of supply.
As hitherto constructed these machines have been able to produce paper only in
the form of a continuous sheet or web because the sides of the successive moulds at
the part of their travel where the pulp is received and the paper formed have butted
closely against each other so as to constitute a continuous mould; the joints between
the adjoining moulds have moreover been somewhat imperfect owing to the more or
less uneven nature of the butting edges. The continuous sheet on leaving the
mould has been conducted in the ordinary way to press rollers and then to a drying
cylinder.
Now according to my invention I so construct the machine as to produce the
paper in separate sheets with a true deckle edge on every side, and by a special
arrangement of felts I provide for delivering these separate sheets successively 80
that they can be piled one above another immediately on leaving the machine.
The sheets can therefore be "flat pressed," 'parted,"
"loft dried,'
""sized" and
otherwise treated precisely as vat made or hand made papers.
"
For the purpose of my invention I attach to either the leading side or the trailing
side of each mould a transverse strip of brass or other suitable metal or material of
sufficient height to separate the pulp received by that mould from the pulp on the
next adjoining mould, with the result that instead of the paper being produced in a
continuous web it is produced in separate sheets. This metal strip preferably
overlaps the edge of the adjoining mould thereby avoiding all inconvenience from
the uneveness of such edge, Or the transverse separator may consist of two
transverse strips attached respectively to the meeting edges of adjoining moulds.
The moulds carry the successive sheets thus formed under a couching roll and on
passing this roll each sheet is taken by an endless felt which conducts it to a guide
roller. At this guide roller it meets a second endless felt and it is carried between
the two felts to the press rollers. After leaving the press rollers the first endless
felt passes under a guide roller and begins to travel in an upward direction the
sheet adhering thereto while the other endless felt moves in a horizontal direction
a certain distance. The successive sheets are stripped off the first felt by an
attendant and deposited upon the horizontal portion of the other felt from which
they are successively removed and piled on a table or otherwise; or they may be
stripped off the first felt mechanically and deposited direct on the table.
The sides of the sheets where they were separated from the adjoining sheets by
the transverse strips hereinbefore described have a true deckle edge while the other
sides of the sheets have also a deckle edge formed by the usual deckle straps. And
further, each mould may be divided, either transversely or longitudinally, by deckle
wires so as to form any number and size of sheets desired, all having true deckle
edges.
Instead of the transverse strips being sufficiently high to produce separate sheets
as before described they may be only high enough to produce transverse lines of

page_text: thinness in what is in other respects a continuous sheet or web of paper which can
subsequently be readily torn or divided along such lines. In this case the
continuous sheet on leaving the press rollers can be wound on a taking up roller.
Dated this 23rd day of December 1892.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Paper Making Machines.
I, ROBERT WIGHTON MONCRIEFF General Manager and Engineer for the
Sparre Patents Company Limited, of 53 Sackville Street, Machester, 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:
This invention consists of improvements in paper making machines and has
special reference to machines of the kind in which a series of laid or wove moulds
are employed, the moulds being either hinged or connected together so as to form a
continuous or endless chain of travelling moulds which successively receive the pulp
from a pulp box or other source of supply, or being so carried one behind another
as always to form a continuous set of contiguous moulds between the feed and the
couch rolls.
As hitherto constructed these machines have been able to produce paper only in
the form of a continuous sheet or web because the sides of the successive moulds at
the part of their travel where the pulp is received and the paper formed have butted
closely against each other so as to constitute a continuous mould; the joints between
the adjoining moulds have, moreover, been somewhat imperfect owing to the more
or less uneven nature of the butting edges. The continuous sheet on leaving the
mould has been conducted in the ordinary way to press rollers and then to a drying
cylinder.
Now according to my invention I so construct the machine as to produce the
paper in separate sheets with a true deckle edge on every side, and by a special
arrangement of félts I provide. for delivering these separate sheets successively so
that they can be piled one above another immediately on leaving the machine. The
sheets can therefore be "flat pressed," "parted," "loft dried," "sized"
otherwise treated precisely as vat made or hand made papers.
and
For the purpose of my invention I attach to either the leading side or the trailing
side of each mould a transverse strip of brass or other suitable metal or material of
sufficient height to separate the pulp received by that mould from the pulp on the
next adjoining mould, with the result that instead of the paper being produced in a
continuous web it is produced in separate sheets. This metal strip preferably
overlaps the edge of the adjoining mould thereby avoiding all inconvenience from
the unevenness of such edge.
Figure 1 of the accompanying drawings will serve to illustrate the preferred
manner of constructing the moulds in order to produce the paper in separate sheets
with a true deckle edge on every side as above described. The figure is a
longitudinal section of a portion of the machine showing a mould and portions of
two other moulds a and c, these three moulds being hinged or connected together
at d in any ordinary manner or carried one behind another. The body of each
mould is shown as formed of bars e e constituting the mould sides and of cross
ribs ff which may be about 1th of an inch thick and about an inch apart, but any
other suitable construction of mould may be adopted.. ghi represent the laid or
wove wire surfaces of the three moulds a b and c respectively. 1 represents the
.ordinary deckle strap. kk' represent the transverse strips of brass or other metal

page_text: which according to this invention I solder or otherwise fix either to the leading
side or the trailing side of each laid or wove wire surface as hereinbefore
described so as to separate the pulp received by each mould from that on the
next adjoining moulds; the strip is for example fixed to the surface / so as to
overlap the edge of the surface g and the strip k¹ is fixed to the surface i so as to
overlap the edge of the surface h.
Or the transverse separator may consist of two transverse strips attached
respectively to the meeting edges of adjoining moulds.
The moulds carry the successive sheets formed as hereinbefore described under a
couching roll and on passing this roll each sheet is taken by an endless felt which
conducts it to a guide roller. At this guide roller it meets a second endless felt,
and it is carried between the two felts to the rollers. After leaving the press
press
rollers the first endless felt passes under a guide roller and begins to travel in an
upward direction the sheet adhering thereto while the other endless felt moves in a
horizontal direction a certain distance. The successive sheets are stripped off the
first felt by an attendant and deposited upon the horizontal portion of the other felt
from which they are successively removed and piled on a table or otherwise; or
they may be stripped off the first felt mechanically and deposited direct on the
table.
Figure 2 represents diagrammatically the arrangement of felts as above described.
for delivering successively the separate sheets made upon the moulds.
m is the
couching roll to which the successive moulds carry their sheets. Around the
couching roll an endless felt n passes; this felt takes up each successive sheet and
conducts it to a guide roller p. At this guide roller the sheet meets a second
endless felt and it is carried between the two felts n and q to the press rollers r r.
After leaving the press rollers the endless felt n passes under a return guide roller s
and begins to travel in an upward direction, the sheet which is indicated at t
adhering thereto, while the other endless felt q travels in a horizontal direction as
seen at to a return roller u. The sheets are successively stripped off the felt n
at or about the point t and deposited upon the horizontal portion q¹ of the felt q from
which they are successively removed and piled on a table or otherwise. The felt n
after leaving the return roller & goes back to the couching roll m passing on its
way over various rollers, the arrangement shown, which however is not arbitrary,
comprising a guide roller v, licking rollers ww, stretch roller and conducting
roller y.
The felt y after leaving the return roller u goes back to the guide roller p,
passing on its way over various rollers, the arrangement shown, which again is not
arbitrary, comprising guide or conducting rollers zzz and a stretch roller ¹.
The sides of the sheets where they were separated from the adjoining sheets by
the transverse strips k (Figure 1) herein before described have a true deckle edge
while the other sides of the sheets have also a deckle edge formed by the usual
deckle straps. And further, each mould may be divided either transversely or
longitudinally by deckle wires so as to form any number and size of sheets desired,
all having true deckle edges.
Instead of the transverse strips k being sufficiently high to produce separate
sheets as before described, they may be only high enough to produce transverse
lines of thinness in what is in other respects a continuous sheet or web of paper
which can subsequently be readily torn or divided along such lines. In this case
the continuous sheet on leaving the press rollers can be wound on a taking up
roller.
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 :-
1. In paper making machines of the kind herein referred to, the attaching of
transverse strips of brass or other material to the side edges of the moulds so as to
produce separate sheets of paper with deckle edges at the parts corresponding to

page_text: such strips or to produce transverse lines of thinness in what is in other respects a
continuous sheet or web of paper, substantially as hereinbefore described.
2. The arrangement of endless felts, substantially as hereinbefore described, for
delivering separate sheets successively.
Dated this 22nd day of September 1893.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.