Improvements in Paper-making Machines.
Year: 1892

page_text: .Date of Application, 28th Jan., 1892-Accepted, 14th May, 1892
COMPLETE SPECIFICATION.
Improvements in Paper-making Machines.
J, JAMES HOLDEN of Simonstone Paper Mill, Padiham, near Burnley, in the
County of Lancaster, Paper Manufacturer, 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 :-
66
My invention relates to paper making machines and consists in an improved
arrangement or construction of the doctors used for the jacketted or cloth covered
"
couchers or squeezing rollers of said machines. Hitherto, said doctors have
been made of blocks or scantlings of wood bolted to stands on the side frames, and
set up hard against the roller, so that water fed into the angle formed by the roller
and doctor for cleaning the jacket, cannot flow out between them. In consequence
of this, the roller is subjected to great friction, and the nap of the cloth jacket
becomes rapidly worn off, so that the jackets have to be frequently renewed, while
the driving power required is materially increased thereby. The object of my
invention is to prevent this wear, and effect a saving in jackets and driving power
which I attain by employing a revolving roller instead of the fixed wood doctor.
This doctor roller is carried at each end in bearings adjustable on frames.or:stands
on each side of the machine, by means of screw spindles, or their equivalents, so that
the doctor roller can be pressed against the "coucher or squeezing roller as much as
may be required for preventing the water from passing between them, and for pro-
ducing the desired dryness of the jacket. The doctor roller is taken round by the
friction at the same surface speed as the jacket, and the wear of the latter is much
reduced, while less power is required for driving than with the fixed wooden doctors
heretofore employed.
"
My invention also relates to means whereby the nap of the jacket or covering of
the coucher roller may be laid smoothly and thus prevent the trouble and annoyance
caused each time the roller has to be re-covered.
Of course it will be understood that machines can be made of varying widths
upon the lines of my invention. And in order that my said invention may be
thoroughly understood, I will now proceed to describe the parts on the drawings to
which my invention particularly refers.
Fig. 1. is an end elevation shewing in particular the application of my improve-
ments to the rollers of an ordinary "coucher" machine.
Fig. 2. is a front elevation of the same but only shewing in particular the
arrangement of the standards. As some of the parts of this machine are well
known to the trade and are not new, I will only describe the parts of my invention
and their applicability to this class of machine.
A. is the roller or revolving doctor which I use in place of the heretofore adopted
stationary doctor, or wood plank or beam, running parallel to the longitudinal axis
of the "coucher" roller. B is a moveable sliding piece on the foot or angle
extension C. To the sliding piece B is attached a plate D of hard brass, gun, or
other suitable metal, this plate is what is termed in the trade a "doctor" and is
employed for the purpose of scraping or cleaning the roller A and is shown on the
drawings at D. This angle piece or doctor D is with the sliding piece B, adjustable
by means of the set screws E and F.
The roller A is adjustable in the slot G in which is moveable a die H having an
extension at I, which receives the lower end of the screw J, by means of lock nuts K.
The other end of the screw J is provided with a hand wheel L. By this arrange-
ment it will be seen that the roller A can be raised or lowered at will. The roller A.
it will be seen takes from the "coucher any accumulation of wet pulp and this
in turn is scraped off the said roller by the doctor D.
"

page_text: Now it is well known to paper makers that when a jacket or covering is newly
put upon the "coucher "roller, that the nap or the covering does not lay
satisfactorily for some little time, and causes a great deal of trouble in consequence,
and in order to obviate these defects, I provide in the rear of the roller A, a brush
or other suitable means which can at such times be brought to the face of the
"coucher" roller, and when in contact with it, cause the nap of the covering to be
laid in a smooth manner. When the nap has through the application of these
means got bedded or nicely laid, the brush or equivalent is withdrawn, and the
work proceeds as before. This brush or nap layer is shown at M, provided with a
suitable back or strengthening piece N, which receives the end of a screw O,
screwed in the top of the bracket P. The screw O, is secured in place by the set
screw Q. R, is a perforated water pipe for damping the jacket of the "coucher."
The arrangement of this machine provides for an easy means of raising the
revolving doctor when required, to replace the travelling gauze wire. When the
revolving doctor is raised, the "coucher" can then be easily rolled out from its
bearings in order to be recovered.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
.
1. The combination with a revolving roller A, of dies H, adjustable in slots G,
by means of screws J, working in the manner, and for the purpose substantially as
herein described and illustrated in the accompanying drawings.
2. The combination with the doctor D, of a sliding piece B, moveable in the
bracket C, and adjustable by the screws E and F in the manner and for the purpose
substantially as herein described and illustrated by the accompanying drawings
3. The.combination with a brush M, of an extension N, and adjustable screw O,
in the bracket P, all for the purpose substantially as herein set forth and illustrated
by the accompanying drawings. .-
Dated this 97th day of Januar 1900