Improvements in Machinery or Apparatus for Making Corrugated Paper.
Year: 1891

page_text: _Date of Application, 14th Aug., 1891
Complete Specification Left, 23rd Apr., 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Making Corrugated
Paper.
I, GEORGE MAUNSELL SMYTH, of Britannia Row, Essex Road, in the County
of, Middlesex, Director of the Thompson and Norris Manufacturing Company
Limited, do hereby declare the nature of this invention to be as follows:-
My invention relates to machinery or apparatus for making corrugated paper and
comprises the herein described improvements.
In machines for this purpose as heretofore constructed the sheet of paper that
has been corrugated or crimped by the fluted rollers and the plain pasted sheet.
intended to form the face or lining of the finished paper are wound together upon a
roller or rod. This roll of paper is then allowed to stand some considerable time
usually in a current of air to allow of the setting of the paste and the proper or
secure adhering together of the crimped and plain sheets. This method entails
much loss of time, and moreover a great deal of waste paper is produced, as several
of the inner and outer layers of each roll are always spoiled, the former being
crushed by the pressure to which they are necessarily subjected, and the latter
being faulty owing to slackness by reason of which the pasted sheet does not.
properly adhere to the corrugations.
The chief object of my said invention is to dry the sheets after they have been :
pasted and joined together and before they leave the machine, thereby obviating
the objections above stated which are incident to the process as heretofore carried
out, and enabling the machine to deliver the corrugated paper in a finished con-
dition. My said method of drying is so carried out as not to bake the paste or
otherwise injure its adhesiveness.
My said invention comprises other improvements hereinafter set forth.
In carrying my invention into practice I provide two or more, hollow cylinders
adapted to be heated by steam or in any other convenient manner.
These cylinders
are preferably situated above the corrugating and pasting machine. They are
carried in suitable bearings and are driven slowly preferably by a band. The said
cylinders are placed a little distance apart and between each pair of cylinders are
mounted in bearings a pair of small rollers. These rollers are intended to operate
as guides for a continuous apron preferably of felt which is by this means kept in
contact with the cylinders and is guided from one cylinder to the next in the series.
Beneath the lower or lowest cylinder are also two similar guide rollers. The felt
apron returns from one of the last named rollers to the other around a second series
of guide and tension rollers suitably arranged for the purpose. In some cases I
employ an apron constructed of thin perforated sheet metal in lieu of the felt apron.
I sometimes heat the guide rollers as well as the cylinders.
The pasted and corrugated sheets are brought together and passed around 'the
heated drying cylinders between the cylinders and the felt, or perforated metal apron,
the latter acting as a pad which presses the paper against the cylinder while
providing for the escape of the vapour produced by the drying of the paste. The
paper passes partially around each drying cylinder in succession and when it leaves
the last cylinder the drying is complete and the paper may be wound upon a spindle
or roller without fear or injury, or it may be cut up into lengths as required. The
cylinder driving band while being sufficiently tight to drive the cylinder and main-
tain a suitable tension on the paper is yet slack enough to allow of slip, and so
avoiding injury to the paper..
I prefer to provide two spindles for receiving the finished paper. On these

page_text: spindles the paper is wound alternately and when one is full the sheet is severed
and conducted to the other spindle. The filled roll is then removed and replaced by
an empty spindle or rod ready for receiving the paper again when the other roll is
filled.
My invention also comprises the provision of two or more pairs of crimping
rollers for producing corrugations of different sizes. The lower roller of each pair
(which is the driving roller) is supplied with a gear wheel running loose on the
axle which can be secured by a key when it is required to be driven. I prefer to
provide one key that will fit all the said gear wheels and which may be moved
from one to the other according as to which pair of rollers are required to be
worked.
In some cases. I provide two sets of feeding and pasting rollers for applying a
lining or covering to both sides of the corrugated paper.
Dated this 14th day of August 1891.
HASELTINE, LAKE & Co.,
45; Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Making Corrugated
Paper.
I, GEORGE MAUNSELL SMYTH, of 192 Lordship Road, Stoke Newington,
Middlesex, Gentleman, 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 relates to machinery or apparatus for making corrugated paper.
In machines for this purpose as heretofore constructed the sheet of paper that
has been corrugated or crimped by the fluted rollers and the plain sheet intended
to form the face or back of the finished paper and which is pasted as it passes
through the machine, are brought together and then wound upon a roller. This
roll of paper is very wet and is therefore not fit for immédiate use, but has to be
dried which is usually done by allowing the roll to stand some considerable time in
a current of air to allow the paste to set properly and the two sheets to become
firmly united. This method of procedure entails great loss of time and moreover
much of the paper is lost for the reason that several of the inner layers of each roll
are usually crushed by the pressure to which they are subjected, and many of the
outer layers are spoiled by reason of the slackness which is the cause of the pasted
sheet not firmly adhering to the corrugations.
The chief object of my said invention is to dry the rolls or sheets after they have.
been pasted and joined together and before they leave the machine. By my
improvements I obviate the objections above referred to which are incident to the
process as heretofore carried into practice and I am enabled to deliver the
corrugated paper in a fit state for immediate use.
My said drying process is so carried out as not to bake the paste or otherwise
injure its adhesiveness.
My said invention comprises the various improvements hereinafter set forth.
In the accompanying drawing I have shown in side elevation a machine which
embodies iny invention in a convenient and practical form.
A, A, is the framing of the machine; B is the roll of paper about to be corrugated,
Cis the roll of plain paper to be pasted and joined to the said corrugated paper to
form the face or backing therefor. D is the pasting apparatus which comprises. a
trough d in which rotates a pasting roller d', and a pair of scrapers d², for
removing superfluous paste. The said scrapers are carried by brackets d³ d³ and:
are adjustable thereon by screws d, d. For maintaining proper contact between
the sheet to be pasted and the pasting roller and for regulating the pressure of the

page_text: sheet on the roller I provide two rollers d³, d' which are placed one on each side the
pasting roller. The said pressure rollers are carried in bearings do, which are
adjustable vertically in brackets d', d' by means of adjusting screws d³, d³. EE are
the ordinary inking and printing rollers for marking the paper as desired. These-
rollers are guided between suitable guide brackets E¹.
F, F are the ordinary fluted rollers for corrugating the paper. The sheet a which
has been corrugated, and the plain sheet which has been pasted, meet at the guide-
roller and pass together over the said roller. The compound sheet thus formed
then passes on to the drying apparatus now to be described.
around
This apparatus comprises two large hollow cylinders or drums G, G¹ carried by
suitable bearings on the framing. The said rollers are heated by steam which
enters by a pipe that passes through a stuffing box in the hollow axle of each drum...
Around the drum G I provide a series of small guide rollers g mounted on brackets g'
carried by the framing. h is a continuous apron made of felt, carpet, cloth, canvas,.
perforated metal or other suitable porous material. The said apron passes
the cylinder G and is in contact therewith for the greater portion of the circum-
ference and returns over the guide rollers g as indicated. The bearings of one of
the rollers are made adjustable toward and from the cylinder to provide for
regulating the tension of the apron. An adjusting screw 92 is provided at each end
of the said adjustable roller 9. For convenience, the said screws are driven through
bevel gear wheels g³, and a chain or belt g' from a hand wheel g" which is placed at.
Another of the said
a convenient level for being operated by the attendant.
rollers g is arranged to be adjusted in a direction at right angles to the cylinder
radius at that point. For this purpose its bearing at one end works on a screw
which is carried by its bracket gl and is placed at right angles to the cylinder radius.
at that point and to the roller axis. By rotating the, said screw 9° the roller can
be tilted up or down, and by this means the apron can be caused to travel evenly
over the rollers. In some cases I may heat one or more of the guide rollers, but 1
prefer not to do this.
k, are other guide rollers for the purpose hereinafter specified. I are scrapers.
pivoted at for scraping the cylinders G G¹
The action of my improved machine is as follows, that is to say, the corrugated
and pasted sheets which are joined together at the roller c as above mentioned pass'
around the first guide roller and then between the apron and the cylinder G
and are pressed by the said aprou into close contact with the said cylinder which
is revolving slowly. The two sheets are thereby firmly pressed together and held
while the paste is gradually dried by the heated cylinder. The material of which
the apron is composed being porous or perforated, it allows of the free escape,
therethrough of the vapour produced by the drying of the paste. After passing
nearly completely round the said cylinder G the now partially dried paper leaves
the said cylinder and passes around the guide roller k and then over the other
drying cylinder G¹ which latter completes the drying process. The paper then
passes over the guide roller and is finally wound up in a condition ready for use
on a receiving spindle H. Both the cylinders G, G¹ and also the receiving
spindle H are driven by suitable gearing and the paper is thus drawn forward
through the machine at a uniform rate. This rate may be increased or diminished
driven.
as required by means of cone pulleys through which the machine
In some cases I may dispense with the cylinder G and have one drying
cylinder only or I may have more than two drying cylinders. In the latter
case I am enabled to drive the machine much quicker and thereby increase the
output.
I prefer to provide two spindles F for receiving the finished paper, so that.
when one is full the sheet may be severed and conducted to the other spindle.
The filled spindle is then removed and replaced by an empty one.
In some cases I provide two sets of feeding and pasting rollers for applying a
covering to both sides of the corrugated paper.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that, what I
claim is :-.
1. The combination, with a machine for making corrugated paper consisting of a
corrugated sheet pasted to one or more plain sheets, of drying apparatus for.
delivering the paper in a dry condition fit for immediate use.
2. The drying roller or rollers with the endless apron in combination with the
apparatus for corrugating and pasting the paper, substantially as described.
3. The drying roller in combination with the endless apron and the rollers for
carrying the return part of the apron, one of said rollers being adjustable for
regulating the tension of the apron, and another for maintaining the apron even,
substantially as described.
4. The machine constructed substantially as described with reference to the
drawing, for the purpose specified.
Dated this 23rd day of April 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.