IMPROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF SANITARY, DRAIN, AND OTHER POTTERY WARE PIPES, ALSO APPLICABLE TO THE MANUFACTURE OF TILES, BRICKS, AND CERTAIN OTHER FORMS, FORMED OF CERTAIN PLASTIC MATERIALS
Year: 1879

page_text: LETTERS PATENT to William Allen, of Leicester, in the County of Leicester,
Engineer, for the Invention of "IMPROVEMENTS IN MACHINERY FOR THE
MANUFACTURE OF SANITARY, DRAIN, AND OTHER POTTERY WARE PIPES, ALSO
APPLICABLE TO THE MANUFACTURE OF TILES, BRICKS, AND CERTAIN OTHER
FORMS, FORMED OF CERTAIN PLASTIC MATERIALS."
Sealed the 16th March 1880, in pursuance of an Order of the Lord Chancellor, and
dated the 3rd: Sentember 1870
PROVISIONAL SPECIFICATION left by the said William Allen at the Office
of the Commissioners of Patents on the 3rd September 1879.
WILLIAM ALLEN, of Leicester, in the County of Leicester, Engineer. "IM-
PROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF SANITARY, DRAIN, AND
OTHER POTTERY-WARE PIPES, ALSO APPLICABLE TO THE MANUFACTURE OF TILES,
BRICKS, AND CERTAIN OTHER FORMS, FORMED OF CERTAIN PLASTIC MATERIALS."
According to this Invention, I construct a machine with a tapered barrel, the
larger end of which is fitted at that end of the machine where the plastic material
is discharged from; within this tapered barrel is a tapered worm or screw corres-
ponding to the taper of the barrel with one or more threads or blades of the same
pitch throughout its length, revolving in the said barrel. Continuous feeding of
the machine, effected by the plastic material being fed through a hopper in that
part of the cylinder which is fitted with knives, whereby the clay or other plastic
material is thoroughly mixed and forced forward into the tapered compressing part.
The interior of the compressing part of the barrel is made very rough, and may
have projections so as to prevent the plastic material turning round in a body on
the screw. By constructing a machine with a tapered barrel and screw as aforesaid,
the clay or other plastic material is prevented from being forced back, instead of
through the dies or moulds as is commonly the case with machines of ordinary
construction..

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, and
of an Order of the Lord Chancellor, filed by the said William Allen in the
Great Seal Patent Office on the 16th March 1880.
WILLIAM ALLEN, of Leicester, in the County of Leicester, Engineer.
"IM-
PROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF SANITARY, DRAIN,
AND OTHER POTTERY WARE PIPES, ALSO APPLICABLE TO THE MANUFACTURE OF
TILES, BRICKS, AND CERTAIN OTHER FORMS, FORMED OF CERTAIN PLASTIC
MATERIALS."
According to this Invention, I construct a machine with a taper barrel, the
larger end of which is fitted at that end of the machine where the plastic material
is discharged from. Within this tapered barrel is a tapered worm or screw,
corresponding to the taper of the barrel, with one or more threads or blades of the
same pitch throughout its length, revolving in the said barrel. Continuous feeding
of the machine is effected by the plastic material being fed through a hopper in
that part of the cylinder which is fitted with knives, whereby the clay or other
plastic material is thoroughly mixed and forced forward into the tapered compressing
part. The interior of the compressing part of the barrel is made very rough, and
may have projections so as to prevent the plastic material turning round in a body
on the screw.
By constructing a machine with tapered barrel and screw as aforesaid, the clay
or other plastic material is. prevented from being forced back, instead of through
the dies or moulds, as is commonly the case with machines of ordinary
construction.
And in order to explain my said. Invention more fully, I will now proceed
to describe the same with reference to the accompanying Drawing, which
represents a side elevation of a machine constructed according to my said
Invention.
A shews the hopper, through which the plastic material is fed.
B shews the mixing chamber.
⚫C shews the small part or inlet end of the compressing cylinder..
D shews the larger part or outlet end of same. This cylinder is preferably
provided with ribs or projections to prevent the plastic material turning round in a
body. The screw is shewn in dotted lines at. d.
E shews the enlarged chamber for the moulds or dies.
F shews the die.
G shews the cutting table..
H shews the pipe ready for cutting into lengths. The action of a machine.
constructed as above, is as follows:-The machine being set in motion, the clay or
other plastic material is fed thereinto by means of the hopper A, and is forced by
the screw d through the small part of the compressing chamber and passes out at
the larger part D into the enlarged chamber E, and is formed as required. In the
Drawing it is shewn formed into a pipe, but of course other forms may be produced
according to requirements and the moulds or dies employed.
I would here remark, that the machine may be vertical- instead of horizontal as
shewn..
Having thus described and ascertained the nature and object of my said Invention,
and the manner of carrying the same into practical effect, I would remark in*
conclusion that what I claim as my Invention is,-
First. The taper compressing chamber having its smaller end at that part where

page_text: the clay or other plastic material is forced in or enters substantially as and for the
purpose set forth.
Secondly. The taper screw or worm substantially as and for the purpose set
forth.
In witness whereof, I, the said William Allen, have hereunto set my hand and
seal, this Fifteenth day of March, in the year of our Lord One thousand
eight hundred and eighty.
WILLIAM ALLEN. (L.S.)