IMPROVEMENTS IN RAG ENGINES
Year: 1884

page_text: I JOSEPH ROBINSON MAYFIELD of South Hill Hemel Hempstead in the county
of Hertford Paper Manufacturer do hereby declare the nature of my invention for
"IMPROVEMENTS IN RAG ENGINES" to be as follows:-
This invention relates to a new and improved construction and arrangement of
Engines for the washing breaking and beating of rags and other material for the
manufacture of paper whereby the material under treatment is maintained in a
constant state of circulation agitation and admixture during the process of grinding
or disintegration.
In ordinary beating Engines for the manufacture or preparation of paper the
pulp is delivered by the roll on to an inclined plane called the back-fall down
which it passes round the end of the midfeather to the backside of the Engine
along which it travels round to the front of the roll; owing to the construction of
the trough or cistern those portions of the pulp nearest the midfeather having a
much shorter distance to travel than those nearest the circumference pass more
frequently between the roll and bed-plate the result being that the pulp is not
reduced to an equal degree of fineness. According to my improvements I remove
the whole or greater portion of the inclined plane or back-fall together with that
portion of the midfeather adjacent to it and use instead thereof a trough of
sufficient capacity to receive and convey the pulp from the roll to the backside of
the Engine which said trough I place parallel to the roll or nearly so; the bottom
of the said trough is placed on an incline being highest at that end next the outside
of the engine and falling gradually to the level of the bottom of the Engine at the
opposite end of the said trough. By this arrangement that side of the trough which
is the furthest from the roll may form a portion of the end of the engine. Also the
same arrangement may be made in existing engines by placing the trough at the
end of the midfeather and moving the roll up to it; the removal of the whole or
the greater portion of the back-fall in this case as well as in the former.being an
essential part of the invention. By these improvements a more thorough admixture
of the pulp during the process of beating is obtained.
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1
CT
1004

page_text: .
COMPLETE SPECIFICATION.
I JOSEPH ROBINSON MAYFIELD of South Hill Hemel Hempstead in the county
of Hertford Paper Manufacturer do hereby declare the nature of my invention for
IMPROVEMENTS IN RAG ENGINES FOR THE MANUFACTURE OF PAPER AND OTHER
FELTED FABRICS 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 a new and improved construction and arrangement of
engines for the washing breaking and beating of rags and other material for the
manufacture of paper whereby the material under treatment is maintained in a
constant state of circulation agitation and admixture during the progress of
grinding or disintegration. In ordinary Beating Engines for the manufacture or
preparation of paper the pulp is delivered by the roll on to an inclined plane
called the back-fall down which it passes round the end of the midfeather to the
backside of the Engine along which it travels round to the front of the roll; owing
to the construction of the trough or cistern those portions of the pulp nearest to
the midfeather having a much shorter distance to travel than those nearest the
circumference pass more frequently between the roll and bed plate the result being
that the pulp is not reduced to an equal degree of fineness.
According to my improvement I remove the whole or the greater portion of the
inclined plane or backfall together with that portion of the midfeather adjacent to
it and use instead thereof a trough of sufficient capacity to receive and convey the
pulp from the roll to the backside of the engine which said trough I place parallel
to the roll or nearly so; the bottom of the said trough is placed on an incline being
highest at that end next the outside of the Engine and falling gradually to the
level of the bottom of the Engine of the opposite end of the said trough. By this
arrangement that side of the trough which is furthest from the roll may form a
portion of the end of the engine. Also the same arrangement may be made in
existing Engines by placing the trough at the end of the Midfeather and moving
the roll up to it. The removal of the whole or the greater portion of the back-fall
in this case as well as in the former being an essential part of the invention By
these improvements a more thorough admixture of the pulp during the process of
beating is obtained.
This invention and the nature thereof and in what manner the same is to be
performed are more fully explained by reference to the drawings hereto annexed.
Fig. 1 represents a longitudinal elevation of a Rag Engine the cistern' whereof
being indicated by the letters A A and the said trough being indicated by
the letters T T forming part of the cistern A A.
Fig. 2. Is a section through the line S S of Fig 1 shewing the inclined bottom
of the trough.
Fig 3. Shows a plan of the Engine with the cover on.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
"The substitution for the whole or greater portion of the inclined plane or back-
fall, and that portion of the midfeather adjacent thereto in rag engines as now
constructed, of a trough placed parallel to the roll, as herein before and in the
annexed drawings more particularly described.
Dated this 14th day of October 1884.