Improved Means for Stretching and Guiding the Endless Felts or other Cloths used in Paper-making Machines.
Year: 1890

page_text: Date of Application, 25th Aug., 1890-Accepted, 27th Sept., 1890
COMPLETE SPECIFICATION.
Improved Means for Stretching and Guiding the Endless Felts or
other Cloths used in Paper-making Machines.
I EDWARD PARTINGTON, of Turn Lee Paper Works Glossop in the County of Derby
Paper 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 :-
This invention relates to the means used for stretching and guiding the endless felts
or other endless travelling cloths used in paper making machines.
The object of the invention is to prevent the liability which such endless felts or
cloths have to move gradually in a lateral direction towards one end or the other of
the rollers round which they pass during the working of the machine to dispense with
adjustable guide rollers and to keep the endless felt or cloths always in a correct
central position upon the rollers.
This fault has hitherto been corrected on such machines by mounting the guide
roller axles in adjustable bearings so that by moving one of the said bearings either
forwards or backwards by hand (or automatically) the roller can be set very slightly
askew and thus give it a tendency to pull or draw the felt or cloth back into the
central position, when the roller required to be set square again to keep it central, and
this troublesome operation had to be frequently repeated whenever the endless felt
or cloth showed a tendency to change its position in a lateral direction.
According to my invention 1 make one or more of the stretching rollers round
which the felt or cloth passes slightly barrel shaped (instead of perfectly cylindrical)
that is rather thicker in the centre and tapering in a curve gradually towards each
end.
My invention will be readily understood on reference to the accompanying drawings
on which Fig. 1. is an end elevation, and Fig. 2. a side view of part of a paper making
machine showing a short endless felt or cloth a working over one of three drying
cylinders b mounted on the frame c.
The roller d round which the felt or cloth passes is made barrel shaped as shown
and the felt a passes partly round the drying cylinder b (which drives it) to the other
stretching roller d* which may be cylindrical and the roller d** instead of being
mounted in adjustable bearings as usual is a plain carrier roller mounted in fixed
bearings.
The barrel shaped form of the roller d (see Fig. 1.) will be found not only to
prevent the lateral motion of the endless felt or cloth but also to correct the tendency
to "sag" in the middle which is sometimes found to exist in such felts or cloths.
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
claim is :-
The combination with the endless felts or cloths used in paper making machines of
one or more guiding rollers of a barrel shaped form in conjunction with the ordinary
cylindrical stretching and carrier rollers whereby the usual adjustment of the guiding
roller or rollers is dispensed with, and the felt or cloth stretched and guided more
efficiently.
1
. 00
day of August 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agent for the Applicant.