Improvements in Glazing Paper and in Machinery or Apparatus therefor.
Year: 1890

page_text: Date of Application, 20th Mar., 1890
Complete Specification Left, 15th Dec., 1830-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Glazing Paper and in Machinery or Apparatus
therefor.
1, JAMES ROBERTSON, of Cartridge Paper Mills, Pollokshaws, in the County
of Renfrew, Paper Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object to produce, at one operation, a glaze or finish
upon both sides of paper in the course of its manufacture this object being effected
by additions to or improvements upon the ordinary Yankee glazing apparatus.
Under the invention there is provided in conjunction with the usual cylinder one
or more other cylinders or rollers, preferably cotton rolls, these being carried in
bearings so that they are circumferentially in contact with the usual cylinder. The
bearings of the additional roll or rolls are adjustable a screw, bearing on an
india rubber or other pad, being employed to hold the cotton roll or rolls in
contact with the cylinder so as to be driven or rotated by it or equivalent apparatus
may be used for that purpose. The paper to be glazed is conducted between
the cylinder and the cotton roll or rolls the cylinder glazing one side and the
cotton roll or rolls the other at the same operation. In conjunction with the
cotton roll or rolls there is provided one or more steam pipes for damping or
spraying the outer surface of the paper the pipe being situated above and parallel
with the longitudinal axis of the roll and when more than one roll is used pipes
are or may be situated in the space between each of them.
After being glazed the paper passes from the cylinder under a roller and is wound
up in the usual manner.
Dated this Ninataanth day of Moab 1200
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Glazing Paper and in Machinery or Apparatus
therefor.
JAMES ROBERTSON, Paper Manufacturer, Cartridge Paper Mills, Pollokshaws,
Glasgow, 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 has for its object to produce a finish or glaze on that side of the
paper left rough by the ordinary process of manufacture followed in Yankee paper
making machines, this object being effected by means of additions to the ordinary
apparatus fitted for glazing the paper, these additions, fitted to the cylinder are
represented in Sheets 1, 2, and 3 like letters representing like parts in each sheet.
The apparatus consists essentially of one or more cylindrical rolls E E preferably
made of the material known as compressed cotton, the axles of which rotate in
metal bearings or plummer blocks FF supported by the cast iron or other metal
frames Z Z forming part of the main frame of the machine the frames ZZ and the
bearings FF supporting them being so situated that the axis or axes of the roll or
rolls are parallel to the axis of the main cylinder of the machine A. and circum-
ferentially in contact with the same and further they are so situated as will be
shown hereafter that the roll or rolls operate on the paper before it is perfectly dry.
The bearings or plummer blocks F F in which the journals of the roll or rolls
revolve, are not attached rigidly to the frames Z Z but slide in guides forming part
[Price Bel

page_text: of the frames Z Z so that the roll or rolls can be moved towards or away from the
cylinder A, this motion being imparted to them by means of handwheels & screwed
spindles S S working in nuts forming part or rigidly attached to the frames ZZ
cach bearing having a separate screw and handwheel. The pressure from the
screws being transmitted to the bearings through the medium of an india-rubber
block or pad H H (or a spiral spring may be substituted) enclosed in a light metal
casing 0 0 attached to the bearing F. By means of this arrangement the pressure
of the roll or rolls on the cylinder may be increased or diminished at will, or the
rolls may be moved out of contact with the cylinder altogether. In order to damp
the surface of the paper immediately before it comes under the action of the roll
or rolls one or more steam pipes DD are provided the steam issuing from small
perforations on that side of the pipe or pipes adjacent to the cylinder causing the
paper passing immediately beneath the pipes to be slightly damped, when more
than one roll is used a separate pipe is employed for each one, the steam from each
pipe damping the paper before it comes under the respective roll.
In Sheet 1, K represents the paper in course of manufacture on the cylinder A
the cylinder turning in the direction of the arrow. The paper passes between the
cylinder and the roll or rolls, the rotation of the cylinder transmitted by friction to
the roll or rolls causing them to turn in unison with the cylinder and the pressure
of the roll or rolls causing the rough surface of one side of the paper (the necessary
result of the process of manufacture followed in "Yankee" machines) to acquire
a glaze or finish, the moisture caused by the issuing steam from the pipe or pipes D D
facilitating the operation by slightly softening the fibre of the paper, after having
been submitted to the action of the roll or rolls the paper passes underneath a guide
roller W and is wound up in the usual manner. Although I prefer cotton rolls
I do not confine myself to cotton rolls only chilled iron paper or any other suitable
material may be used.
The Claim
--
I claim that by applying the roll or rolls and the steam damping pipes in such a
position on the machine when the paper being manufactured is neither too dry no
too wet the usual rough surface of the under side of machine glazed papers is
thereby smoothed and the glazed surface also acquires a better finish.
Dated this 13th day of December 1890.
JAMES ROBERTSON.