Improved Apparatus for Straining Paper Pulp and the like.
Year: 1896

page_text: Date of Application, 3rd Feb., 1896-Accepted, 7th Mar., 1896
COMPLETE SPECIFICATION.
Improved Apparatus for Straining Paper Pulp and the like.
I, FREDERICK WILLIAM HALL of Holmes Cottage, Little Eaton in the
County of Derby, Engineer, 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 object of my invention is to provide an improved apparatus for straining
paper pulp and the like; it refers to the flat variety of strainer.
In describing my invention reference will be had to the drawings which form a
part of this Specification and upon which :-
Figure 1 is a side elevation of my improved apparatus.
Figure 2 is a sectional elevation on line a-a of Figure 1.
In carrying out my invention I fix the straining plates A in any suitable
framing B the length of which as will be readily understood upon referring to
Figure 2 will vary according to the width of paper or other material to be manu-
factured. The ends of this frame B carry short rods D, D¹, adapted to lie in the
recesses in the blocks E forming part of the cross head F; pivotted to the sides of
these blocks are links or loops G, G¹, and through bosses G in the tops of which
set pins H pass, a lock nut J being provided to each. It will thus be seen that the
straining plates and frame may be readily removed at any time by unscrewing the
set pins H and folding back the links or loops G, G'; or, if it is required to clean
the underside of the straining plates the set pins H are unscrewed at each end and
the loops G folded down, the shackles K are passed round the rods D¹ and that
side of the straining plate frame is raised, the rods D fitting in their sockets, on
that side nearest the shackles, act as hinges upon which the straining plate frame
turns: any suitable handle being provided for operating the shaft L, and so raising
or lowering the straining plate frame.
The cross heads F carry at each end on the threaded spindle M the cover N of
a buffer box the lower part of the box O being fixed to the stationary framing P,
springs Qinside the buffer boxes take off the concussion and by screwing or
unscrewing the threaded spindles M the "knock" or "lift" of the straining plates
may be. varied as required without having to stop the machine or apparatus: lock
nuts R are provided to prevent any variation when once set.
To the centre of the cross head F is fixed a vertical rod passing through the
upper part of the stationary framing P and being fixed to the upper part of a
saddle T, the lower part of this saddle is provided with a projecting flange or
collar U up to which fits a spring V the lower part of the spring resting against a
stationary bearing W provided upon or forming part of the stationary framing P¹,
a slight space being left between the bottom of the saddle piece and the stationary
bearing W. Motion is communicated in any suitable manner (such as by the fast
and loose pulleys X) to the shaft Y which is mounted in any suitable bearings Z
on the stationary framing Pl, this shaft carries a star wheel 1 adapted to engage
the bed 2 on the saddle piece T and as the said star wheel revolves the saddle
piece is pressed downwards as each angle of the star wheel bears thereon the return
motion being given by the spring V the tension of which may be adjusted to a
great extent by the nuts 3 and 4. This rising and falling motion is communicated
by means of the vertical rod S to the cross head F and straining plates A; as will
be readily understood the "knuck" or "lift" being as already stated adjusted to
the greatest nicety by means of the set screws M raising or lowering the cover of
the buffer box in which air holes 5 are provided to assist the buffers in their work.

page_text: I am aware that a star wheel has been used for operating paper pulp strainers
but to the best of my knowledge and belief flat strainers have not hitherto been
made to act evenly all, over the straining surface nor can the knock or lift of
existing flat strainers be readily adjusted while the apparatus is at work nor so
readily cleansed on the under surface as herein described.
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 :-
1. In a machine or apparatus for straining paper pulp and the like the means of
attaching the straining plate frame to a cross head such as F in combination with
adjustable and adjusting buffers and operated substantially as described and
illustrated.
2. In a machine or apparatus for straining paper pulp and the like the improved
means of connecting the straining plate frame to the cross head so that the former
may be raised on one side for cleansing purposes substantially as described and
illustrated.
3. The improved machine or apparatus for straining paper pulp and the like
substantially as described herein and illustrated by the accompanying sheet of
drawings.
Dated this 1st day of February 1896.
W.
SWINDELL,
Imperial Chambers, Derby, Agent for the Applicant.