Improvements in or relating to Card-clothing.
Year: 1895

page_text: Date of Application, 9th Dec., 1895-Accepted, 11th Jan., 1896
Improvements in or relating to Card-clothing.
I, ALBERT KERN of Aachen, in the Empire of Germany, Manufacturer of
Cards, 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:-
This invention relates to the enhancement of the elasticity of the card-teeth.
without diminishing its durability in any way. The enhanced elasticity effects a
better and softer working of the carding-materials.
This result is obtained by means of a partial alteration of form in the cross
section of the wire, inasmuch as the teeth-legs from the place where they issue
from the fixed basic material (card-foundation) are flattened transversely to
the working direction of the teeth-points according to the use for which the card is
intended, over a more or less long piece, as illustrated in Figures 1 to 4 of the
accompanying drawings.
As will be seen from the cross-sections of the flattened parts in Fig. 1, the
alteration of section from round to the most flattened portion of the tooth takes place
gradually in such manner that the power of resisting strain at any point of the
flattened portion of the tooth holds the same proportion to the breaking stress as
exists at the point where the breaking stress attains its maximum, i.e., the place
where the tooth projects from the basic material; whereas, but for such flattening,
the leg of the tooth, in the parts which project from the basic material at the
sacrifice of its elasticity, has a considerable useless strength.
Thus, properly speaking, the flattening brings about only a certain displacement
of the material whereby the elasticity of each tooth is materially enhanced, without
any increase of the risk of breaking. Thence it must be concluded that, for the
purpose of obtaining a specific degree of elasticity, as compared with the teeth
formed of the ordinary round card-wire, it is possible to employ a coarser kind of
wire at this place, inasmuch as the smaller elasticity natural to the stronger wire is.
enhanced by reason of the new form given to the teeth. The advantageous
employment of the stronger wire gives greater durability to the card-clothing.
If taking a middle course, the advantage of greater durability (or strength) of
the card-clothing be not entirely utilized and the teeth be more tightly secured in
somewhat smaller holes in the basic material, a card-clothing is produced which
possessing fully equivalent elasticity is more durable and resistant.
Such a card is distinguished by sustained and more equal elasticity throughout
the entire duration of its use, inasmuch as the greater part of the elasticity
appertains to the wire-teeth themselves and is more independent of the basic
material of the card-foundation, which owing to its very nature, gradually loses
the power of maintaining the elasticity.
In particular, this improvement offers an important advantage in card-clothing
for the fancies of carding engines because by the employment of such improved.
card-clothing in addition to the advantage of having a better carding effect, the
dust and waste produced by its operation are notably diminished, without any
deterioration in working capacity inasmuch as the teeth of card-clothing for the
fancies of carding engines owing to the new form are more curved when they leave
the cylinder card-clothing.
The application of the above-described improvement to the manufacture of
raising-cards, imparts to them in a high degree all the good and peculiar qualities.
of the natural teazle

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Card-clothing in which for the purpose of enhancing the elasticity the teeth
from their point of outlet from the basic material for a part of their length towards
their points are flattened transversely to their working direction.
Dated this 9th day of December 1895.
BOULT & WADE,
Agents for the Applicant..