Improvements in the Construction of the "Guard" for Couch Rolls in Paper Machinery.
Year: 1888

page_text: Date of Application, 6th Feb., 1888
Complete Specification Left, 6th Nov., 1888
Complete Specification Accepted, 7th Dec., 1888
Improvements in the Construction of the "Guard" for Couch Rolls
in Paper Machinery.
I ALFRED BENJAMIN PEARCE of Oughtibridge in the County of York Paper Maker
do hereby declare the nature of this invention to be as follows:-
This invention has for its objects, to reduce the friction usually put upon the jacket
of the roll by the ordinary guard, and thereby lessen the wear and tear; also to carry
off the water and particles of pulp from the surface of the jacket, free from the bearings
of the machinery.
In carrying out my invention, I make the body of the guard, of wood; of a length
corresponding to that of the roll or thereabouts, and at each end I secure a projecting
axis or hearing to fit into suitable brackets or other bearing parts of the machine, and
so that the guard may have a slight rocking movement therein.
To the lower part of the inner face of the guard board or body, I fix a length of
brass angle plate to the horizontal member of which I attach a removable blade
preferably made of wood as being less destructive to the felt jacket of the roll, against
which it is pressed by the action of weighted levers; the said levers being fixed upon
the ends of the guard axles which are made to extend a sufficient distance through
the supporting brackets, and which may be squared to give a good support to the
levers.
The guard thus constructed is of an L shaped cross section, and as the couch roll
revolves towards the guard, it follows that the water pressed out of the jacket is
carried forward and flows into the angle of the guard, at the junction of the vertical
back and the horizontal blade; to carry off this water and small particles of pulp, I
make the axles before mentioned tubular, and opening into the corner of the angle at
each end of the guard, so that there is a clear water way at both ends (or only one if
desired) and to which a pipe or other conductor may be fixed.
Doind the til day of Fahun 1000
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of the "Guard" for Couch Rolls
in Paper Machinery.
I, ALFRED BENJAMIN PEARCE of Oughtibridge, in the County of York Paper Maker
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 objects to reduce the friction usually put upon the jacket
of the roll by the ordinary Guard, and thereby lessen the wear and tear; also to carry
off the water and particles of pulp from the surface of the jacket, free from the bearings
and other parts of the machinery.
I have illustrated my invention in the annexed sheet of drawings in which Fig. 1
represents one of the Axles or trunnions (partly in section) of a Couch roll Guard,
made according to my invention.
Fig. 2, is a cross section of the guard, which also shows one of the ends, and the
position of the blade or scraper upon the roll.
In carrying out my invention I make the body of the guard A, of wood, or of other
suitable material, and corresponding in length with the couch roll to which it is to be
applied.
At each end of the said guard, I secure an axle or trunnion by means of a plate B,
I prefer to make one or both of these axles tubular to form a water way, and having a
neck or bearing to fit into suitable brackets or plummer blocks C, so that the guard
may have a slight rocking movement therein.
To the lower part of the inside face of the guard board or body A, I fix a length of
angle-plate, preferably brass D, to the horizontal or lower member of which I attach
a removable blade E, made of wood, vulcanite or other like material, that will not
prove destructive to the felt jacket of the couch roll F, against which it is pressed by
the action of weighted levers G, fixed upon the axles which are made to extend
through the brackets C.
The Guard thus constructed with the brass angle plate D, is of an L shaped section
and the ends are further closed by blocks of rubber H, shaped to fit upon the blade E,
and against the couch roll F, upon which it is pressed by a suitable spring I.
When therefore the couch roll F, revolves towards the guard, the water that is
pressed out of the felt jacket of the roll by the blade E, flows forward over the blade
and into the angle of the guard formed by the angle plate D, and thence through the
tubular water way of the axle, to a down pipe J, or other conductor.
I
may if desirable carry off the excess of water by means of an opening and fall pipe
communicating with the back of the angle or trough of the guard, in which case the
axles would be solid, or without a water way.
The "wash pipe" is fixed to the inside of the guard by permanent brackets at K.

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, I declare that what 1
claim is :-
1-The general construction and combination of parts constituting my improved
guard for Couch rolls in paper making machinery, for the purpose specified and
substantially as hereinbefore described and shown.
2-In a guard for Couch rolls, the tubular axles for the purpose specified, and
substantially as described.
3-In the construction of Couch roll guards, the combination of an angular back to
receive surplus water, a pipe to carry off same, a blade or scraper, and rubber end
pieces, for the purposes specified and substantially as described and illustrated.
Dated the 5th day of November 1888.
ROBT. F. DRURY,
Agent for the Applicant.