Impurities from Wool and other Fibres before Carding.
Year: 1885

page_text: Impurities from Wool and other Fibres before Carding.
I CHARLES DENTON ABEL of N° 28 Southampton Buildings, Chancery Lane
in the County of Middlesex Consulting Engineer and Patent Agent do hereby
declare the nature of my invention for "IMPROVED APPARATUS FOR REMOVING
BURS, STRAW, AND OTHER IMPURITIES FROM WOOL AND OTHER FIBRES BEFORE
CARDING" to be as follows:-
It has been attempted beretofore to effect the removal of burs, straw, and other
impurities from wool and other fibre by means of saw gins, or cylinders having
circular saw blades operating in combination with revolving brushes or doffers for
reinoving the extracted matters, but such apparatus was very imperfect in its
action, leaving a quantity of the impurities remaining in the wool. According to
the present invention such saw gins are constructed with the saw blades more or
less entirely sunk into the surface of the cylinder, being situated in wide grooves
thereon, in the bottom surface of which narrower grooves are formed into which
the bottom edge of the blades are fixed, and leaving a space in the wider groove
on each side of the teeth of the blade. By this arrangement a certain portion
of the wool or other fibre will be drawn into the grooves, but the burs &c
will be retained on the surface of the cylinder by the saw teeth so that a revolving
brush or doffer can readily remove them from the cylinder.
The saw blades and their grooves may either be formed as separate rings or
helically.
The wool is fed against the surface of the cylinder from between two rollers,
above which is a revolving brush that presses the fibre into the grooves, and at a
certain distance above this is the brush or doffer for removing the burs from the

page_text: saw teeth, and causing them to fall into a pan. On passing beyond this delivery
brush the wool fibre, freed from impurities, is removed from the cylinder by any
suitable known means.
By this arrangement of the saw blades the impurities are prevented from
entering too deeply into the saw teeth, so that they can be readily removed.
It will be readily understood that in place of sinking grooves into the surface of
the cylinder, the saw blades may be fixed on the surface as heretofore, and the
spaces between them be filled in to a certain width with circular or helical metal or
other fillets fixed on the surface of the cylinder. In place of saw blades, projecting
points such as card surfaces may be employed.
OLL 1
11007

page_text: Impurities from Wool and other Fibres before Carding.
I, CHARLES DENTON ABEL, of No 28 Southampton Buildings, Chancery Lane
in the County of Middlesex, Consulting Engineer and Patent Agent, 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:
It has been attempted heretofore to effect the removal of burs, straw and other
impurities from wool and other fibre by means of saw gins or cylinders having
circular saw blades operating in combination with revolving brushes or doffers for
removing the extracted matters, but each apparatus was very imperfect in its
action, leaving a quantity of the impurities remaining in the wool. According to
the present invention such saw gins are constructed with the saw blades more or
less entirely sunk into the surface of the cylinder, being situated in wide grooves
thereon in the bottom surface of which narrower grooves are formed into which
the bottom edge of the blades are fixed, and leaving a space in the wider grooves
on each side of the teeth of the blade. By this arrangement a certain portion of
the wool or other fibre will be drawn into the grooves, but the burs &c will be
retained on the surface of the cylinder by the saw teeth so that a revolving brush
or doffer can readily remove them from the cylinder.
The saw blades and their grooves may either be formed as separate rings or
helically.
The wool is fed against the surface of the cylinder from between two rollers,
above which is a revolving brush that presses the fibre into the grooves, and at a
certain distance above this is the brush or doffer for removing the burs from the
saw teeth and causing them to fall into a pan. On passing beyond this delivery
brush the wool fibre, freed from impurities, is removed from the cylinder by any
suitable known means.
By this arrangement of the saw blades the impurities are prevented from entering
too deeply into the saw teeth so that they can be readily removed.
It will be readily understood that in place of sinking grooves into the surface of
the cylinder, the saw blades may be fixed on the surface as heretofore and the
spaces between them be filled in to a certain width with circular or helical metal or
other fillets fixed on the surface of the cylinder. In place of saw blades projecting
points such as card surfaces may be employed.
Fig. 1 of the accompanying drawing shews a diagram-view of apparatus
constructed according to this invention. A is the grooved cylinder with saw teeth
sunk in the grooves so as to have the points of their teeth flush with the surface
of the cylinder. B B¹ are the feed rollers and C the dabbing brush for supplying
the fibre to the cylinder, and D is the doffer, which is made to revolve in the
contrary direction to the cylinder A, for removing therefrom the burs and other
impurities, that are prevented from entering the grooves by the saw teeth.

page_text: As the surface of the cylinder passes away from the doffer, the fibre is removed
from the grooves in any convenient manner.
Figs. 2 and 3 shew enlarged sections of the grooves E of the cylinder with the
saw teeth L, the points of which project to the surface S of the cylinder, which
thus prevents the burs &c from being grasped. too firmly by the saw teeth. The
edges of the grooves may either be sharp as at Fig. 2 or rounded as at Fig. 3.
Fig. 4 shews, by way of comparison, a section of the saw cylinders with saws
entirely projecting from the surface such as are used at present.
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:-
1. The construction of apparatus for removing burs, straw and other impurities
from wool and other fibre, wherein saw teeth or equivalent devices are more or less
entirely sunk in circular or helical grooves on the surface of a revolving cylinder,
against which the fibre to be treated is fed, so that while the fibre enters the
grooves, the impurities are retained on the surface of the cylinder by the saw
teeth, and can thus be readily removed by doffers, substantially as herein
described.
2. In cylinders constructed as set forth in the preceding claim, forming on the
surface of the cylinder narrow grooves for the reception of the base of the saw
teeth, and above these wider grooves, leaving spaces on each side of the saw teeth,
substantially as herein described.