An Improvement in the Manufacture of Felt Carpets and "Under Felts."
Year: 1888

page_text: Date of Application, 11th Aug., 1888
Complete Specification Left, 10th May, 1889-Accepted, 22nd June, 1889
PROVISIONAL SPECIFICATION.
An Improvement in the Manufacture of Felt Carpets and "Under
Felts."
I WILLIAM MITCHELL of Waterfoot near Manchester in the County of Lancaster
Felt Carpet Manufacturer do hereby declare the nature of this invention to be as
follows:-
The principal object of this invention is to manufacture an
" underfelt" of a fire.
proof nature so as to resist the progress of a fire through the floors of a building,
but the same invention is also applicable to the manufacture of fire proof felt
carpets.
The fabric known as "under-felt" is a soft, thick, loosely felted material which is
used for placing under an ordinary felt or other carpet for the purposes of increasing
the durability and improving the softness thereof as well as excluding cold air and
increasing the warmth and comfort.
per cent.
In the manufacture of fire proof "underfelt" according to my invention I mix
with the wool or other animal fibre, or with the flax, hemp or other vegetable fibre, or
a mixture of both animal and vegetable fibre combined, about 40 or 50
(more or less) of a mineral fibre known as " Asbestos or "Amianthus." I mix
this mineral fibre with the animal or other fibre before carding and I place the
compound fibres so mixed in the carding engine together and I then proceed to card
and felt the same in the usual manner, so as to produce the fabric known as "under-
felt," and it will be found that the combination of the "Asbestos " or mineral fibre
with the other materials in the manner described will render the same impervious
to fire so that even if the floor should be on fire the flames would not pass through
the "under-felt."
It will be evident that by the same process the ordinary felt carpets for dyeing and
printing may also be made fire proof or fire resisting.
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in the Manufacture of Felt Carpets and "Under-
felts."
'
I WILLIAM MITCHELL of Waterfoot near Manchester in the County of Lancaster
Felt Carpet 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:-
The principal object of this invention is to manufacture an "underfelt." of a fire
proof nature so as to resist the progress of a fire through the floors of a building,
but the same invention is also applicable to the manufacture of fire proof felt
carpets.
The fabric known as "underfelt" is a soft, thick, loosely felted material which is
used for placing under an ordinary felt or other carpet for the purposes of increasing
the durability and improving the softness thereof as well as excluding cold air and
increasing the warmth and comfort.
In the manufacture of fire proof "underfelt" according to my invention I mix
with the wool or other animal fibre or with the flax hemp or other vegetable fibre,
or a mixture of both animal and vegetable fibre combined, about forty or fifty per
cent. (more or less) of a mineral fibre known as " Asbestos or Amianthus."
"
66

page_text: I mix this mineral fibre with the animal or other fibre before carding and I place
the compound fibres so mixed in the carding engine together and 1 then proceed to
card and felt the same in the usual manner, so as to produce the fabric known as
"underfelt" or the Asbestos or Amianthus may be mixed with the animal or other
fibre after carding and before felting, and it will be found that the combination of
such "Asbestos " or mineral fibre with the other materials in the manner described.
will render the same impervious to fire so that even if the floor should be on fire the
flames would not pass through the " underfelt."
It will be evident that by the same process the ordinary felt carpets for dyeing and.
printing may also be made fireproof or fire-resisting.
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 manufacture of fireproof or fire resisting felt carpets and "underfelts
by the
admixture or combination of the mineral fibre known as "Asbestos " or "Amianthus"
with the animal or other fibre previously to felting the same, substantially as herein-
before set forth.
n
1
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.