IMPROVEMENTS IN PAPER-MAKING MACHINES FOR FACILITATING THE WASHING OR CLEANSING OF THE ENDLESS FELTS OR CLOTHS USED THEREIN
Year: 1878

page_text: LETTERS PATENT to George Holloway, of Chartham, near Canterbury, in the
County of Kent, Paper Manufacturer, for the Invention of "IMPROVEMENTS
IN PAPER-MAKING MACHINES FOR FACILITATING THE WASHING OR CLEANSING
OF THE ENDLESS FELTS OR CLOTHS USED THEREIN."
caled the 21st January 1879, and dated the 1st August 1878.
PROVISIONAL SPECIFICATION left by the said George Holloway at the
Office of the Commissioners of Patents on the 1st August 1878.
GEORGE HOLLOWAY, of Chartham, near_Canterbury, in the County of Kent,
Paper Manufacturer. "IMPROVEMENTS IN PAPER-MAKING MACHINES FOR FACILI-
TATING THE WASHING OR CLEANSING OF THE ENDLESS FELTS OR CLOTHS USED
THEREIN."
In the use of machines for the manufacture of paper endless felts or cloths
(commonly called wet press felts) are employed for the purpose of facilitating the
removal of the water from the pulp or more solid parts, as the paper is formed and
such felts or cloths soon become choked, requiring to be washed or cleansed, and
to effect such washing or cleansing the felts or cloths according to general practice
have to be removed, involving the stoppage for the time being of the operation of
the machinery as well as loss of paper-producing material.
The object of the Invention is to avoid these inconveniences by effecting the
washing or cleansing of the felts or cloths progressively whilst the same are in use.
For this purpose I remove from under the lower of the expressing rollers the trough
used to collect the water and watery particles expressed from the paper through
the felt on such roller, and I employ a plate acting as a doctor to bear with one of
its edges against the surface of such roller whilst it is otherwise connected to a
trough by which the water and watery particles from the surface of such roller may
be conducted away, as desired.

page_text: The endless felt or cloth in order to its being washed or cleansed is in its return
motion acted upon by numerous jets of hot or cold water from a suitable pipe or
pipes and thence by a series of pressure or hugging rollers, and it is thence con-
ducted to the under surface of the lower expressing roller referred to, and it is
there borne upon by another expressing roller by which the water used in washing
and cleansing with the pulpy matter mixed therewith is expressed, so that the
felt in its continuous progress becomes washed and cleansed ready for re-use con-
tinuously.
The number and character of the jets of water and the character of the pressure
afterwards applied are capable of being regulated.
The extra expressing roller travels by pressure of surface contact with the lower
surface of the ordinary lower expressing roller, and if desired there may be two or
more extra pressure rollers employed. By these means simplicity with economy
of action is attained.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Holloway in the Great Seal Patent Office on the 29th
January 1879.
66
GEORGE HOLLOWAY, of Chartham, near Canterbury, in the County of Kent,
Paper Manufacturer. IMPROVEMENTS IN PAPER-MAKING MACHINES FOR FACILI
TATING THE WASHING OR CLEANSING OF THE ENDLESS FELTS OR CLOTHS USED
THEREIN.
"
In the use of machines for the manufacture of paper endless felts or cloths
(commonly called wet press felts) are employed for the purpose of facilitating the
removal of the water from the pulp or more solid parts as the paper is formed, and
such felts or cloths soon become choked, requiring to be washed or cleansed, and to,
effect such washing or cleansing the felts or cloths according to general practice.
have to be removed, involving the stoppage for the time being of the operation of
the machinery as well as loss of paper-producing material.
The object of the Invention is to avoid these inconveniences by effecting the
washing or cleansing of the felts or cloths progressively whilst the same are in use.
For this purpose I remove from under the lower of the expressing rollers the trough
used to collect the water and watery particles expressed from the paper through.
the felt on such roller, and I employ a plate acting as a doctor to bear with one of.
its edges against the surface of such roller whilst it is otherwise connected to a.
trough, by which the water and watery particles from the surface of such roller
may be conducted away as desired.
The endless felt or cloth in order to its being washed or cleansed is in its return
motion acted upon by numerous jets of hot or cold water from a suitable pipe or
pipes, or by water contained in a suitable trough or holder, and thence by a series
of pressure or hugging rollers, and it is thence conducted to the under surface of
the lower expressing roller referred to, and it is there borne upon by another;
expressing roller by which the water used in washing and cleansing with the pulpy
matter mixed there with is expressed, so that the felt in its continuous progress
becomes washed and cleansed ready for re-use continuously.
But that the Invention may be the better understood I will, by the aid of the
accompanying Drawings, proceed to describe means pursued by me in carrying the
same into effect.
Figure 1 shows by side view an outline of parts of apparatus employed in the
making of paper with my improvements applied thereto, Figure 2 shows a portion
of a plan view of the same.
In each of the Figures the same letters are employed to indicate corresponding
parts.
a, a, a, represent the outline of the framing; b, b¹, represent two of the ordinary
pressing rollers used in pressing the watery particles out of the paper during manu-
facture as such paper is conducted forward by the endless felt or cloth c, which is
caused to travel in the direction of the arrows. In the use of such machinery it is
usual to apply under the lower of these expressing rollers b' a trough, to collect
the watery particles expressed by the action of the rollers b, b', from the paper being
produced.
In carrying my Invention into use I remove such trough, and the watery
particles thus expressed are as they fall down the surface of the lower of such
ordinary expressing rollers b' collected by the plate d, the one edge of which bears
against the surface of that roller b', and thereby acts as a doctor to collect and
direct such watery particles into a trough e from which they may be conducted
away as desired,

page_text: The endless felt or cloth c is in its passage passed partly round rollers f, which
by the extent of surface pressure effected by them act as a series of hugging rollers
to facilitate by expression the removal of the particles of matter from the endless
felt or cloth, whilst the cleansing is facilitated by the action of jets of water, either
hot or cold, conducted through openings formed in or nipples applied to the
pipes g, g, or by passing it through water in a suitable trough or holder indicated
by the dotted lines a¹, a¹. h is an additional expressing roller applied to bear
against the lower of the ordinary expressing rollers 61 by elastic or adjustable
pressure, and thus by pressing on the endless felt or cloth passed between this.
roller h and the lower of the rollers b¹ to press out of the endless felt or cloth such
hot or cold water used in effecting the working of the endless felt or cloth together
with the pulpy matter mixed with it.
The number and character of the jets of water or the character of the trough
of water and the character of the pressure afterwards applied are capable of being
regulated.
The extra expressing roller travels by pressure of surface contact with the
lower surface of the ordinary lower expressing roller, and if desired there may be
two or more extra pressure rollers employed and driven by surface contact. By
these means simplicity with economy of action is attained.
Having thus described my Invention, and means which I adopt in carrying the
same into effect, I would have it understood that I do not confine myself to the
precise arrangements of parts, as shewn and described, as the same may be varied
without departing from the peculiar character of my Invention; but what I do
claim is the arranging or combining parts of paper-making machines for facilitating
the washing or cleansing of the endless felts or cloths used therein, whereby the
watery particles expressed from the paper being produced are conducted away from
the surface of the lower of such expressing rollers by a plate and parts acting as a
doctor and conducting trough, to admit of the endless felt or cloth after the
washing thereof being 'pressed between an additional expressing roller and the
under surface of such under and ordinary expressing roller, substantially as
described.
In witness whereof, I, the said George Holloway, have hereunto set my hand
and seal, this Twenty-third day of January, in the year of our Lord One
thousand eight hundred and seventy-nine.