An Improved Napping Roller for Cylinder Napping or Gigging Machines.
Year: 1898

page_text: Date of Application, 3rd Dec., 1893-Accepted, 11th Feb., 1899
COMPLETE SPECIFICATION.
An Improved Napping Roller for Cylinder Napping or Gigging
Machines.
I, FRANZ MÜLLER, Machine Manufacturer, in M/Gladbach, Prussia, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following state-
ment;
The present invention relates to a napping roller or gig for napping or gigging
machines in which the convex surface, which carries the spirally running card
clothing, is composed of several circular pieces or sections, so arranged that they
can be interchanged with each other on the roller axle. By making the roller in
this manner it is possible, should it be worn out, say at one end, to change the
sections at the centre not equally worn with those at the end and vice versa. In
this way the roller can be made to last much longer than at present.
On the accompanying drawing a napping roller constructed in accordance with
my invention has been represented.
Fig. 1 is a longitudinal section taken through the circular pieces or sections
arranged upon the roller.
Fig. 2 is a front view of the roller, whilst, Figs. 3 to 5 represent, in section and
end views respectively, different modes of making the sections.
The surface of the napping roller or gig, according to the width of working
surface desired, consists more or less of the aforesaid cylindrical pieces or sections a
which can be manufactured from divers materials and these sections a can be
secured upon the rollers 6 by any well known and suitable means, such, for example,
as by separately screwing each section fast upon the roller by means of screws e or
by pressing the sections against each other and securing the whole in position by
means of nuts c (see Fig. 2) screwed upon the ends of the roller. In the latter
case one or more of the sections might have flat ends, as shown at Fig. 3, and be
prevented from turning round by means of screws inserted at both ends; but, if
so desired, they may have toothed or checked out ends of different forms, as shown
at Figs. 4 and 5, by means of which, when they are slid into each other, they can
be locked fast together upon the roller in the same manner as with a clutch coupling.
The best arrangement is that in which the toothed indentations are cut at the same
angle as the spiral course followed by the carding wires or teasels.
Should the napping roller nap or teasel unevenly, that is to say, for example
should it teasel more strongly at the ends than at the middle, it can be easily
made to teasel evenly all over its surface, by first removing the cylindrical
sections a from the roller and then replacing them with those formerly at the ends
at the middle and vice versa.
By changing and interchanging the individual sections of a certain number of
napping rollers in the machine, or by arranging the sections of each roller in
a different order, as before described, it is perfectly evident that the whole of the
cylinders can be equalized so as to give a perfectly even napping or teaseling
action.

page_text: As the individual sections, by means of their toothed ends, lock into each other
in such a manner as to form practically one cylindrical sleeve, which reaches from
end to end of the roller, mistakes in the teaseling cannot occur when the roller is
revolving.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I consider
novel and desire to claim is :-
A napping roller having its convex surface, which carries the card clothing,
composed of a number of separate sections so arranged, upon the roller axle, that
they can be interchanged when necessary in order to enable all parts of the surface
of the roller to be worn equally, substantially as set forth.
Dated this 2nd day of December 1898.
H. D. FITZPATRICK.
100, Wellington Street, Glasgow, Agent,