Improvements in Machinery or Apparatus for Manufacturing Paper.
Year: 1893

page_text: Date of Application, 22nd Dec. 1893
Complete Specification Left, 21st Sept., 1894-Accepted, 27th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Manufacturing Paper.
I JAMES CRAIG of Bridge Hall Mills Bury in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows :-
My invention relates to the construction of the machines employed for
manufacturing paper in continuous length, and especially to the wet end, or wire
part of such machines, the object of the invention being first to afford facility for
the adjustment of the height of the endless wire cloth upon which the pulp is fed,
so as to regulate the flow of pulp upon the wire and the quality of paper produced
while the machine is in motion. Secondly, to regulate the amount of side shake
given to such wire for the purposes of interlocking and consolidating the pulp
thereon while the pulp is passing along on the wire.
In the first place instead of supporting the middle part of shake bars by means
of supports from the base rails as hitherto done, I provide the under side of the
shake bars with stiffening bars and tie-rods to keep them rigid, and mount the
shake bar ends upon adjustable standards, the height of which can be regulated at
pleasure by means of a vertical screw, actuated by worm gearing and hand wheel,
so that the shake bars can be set exactly level or raised or lowered at one end as
may be required to regulate the flow of pulp on the wire, and the quality of paper
produced while the pulp is passing along on the wire.
Secondly. Instead of hinging the shake connecting rod directly by a fixed pin
or stud to the upper end of the shake arm as hitherto practised, I provide the
upper end of the shake arm with a curved slot in which is adjustable a sliding
block which carries the pin or stud to which the connecting rod from the shake
crank pin is hinged. To the adjustable block is fixed a swivelling nut through
which passes a screw, which screw is supported at or near the lower end of the
curved slot by a swivelling stud, and the screw can be turned by means of a hand
wheel and thus the height of the sliding block to which the shake connecting rod
is attached, and consequently the amount of motion given to the lower end of the
shake arm, and also the motion imparted to the shake bars can be regulated with
the greatest exactitude while the machine is in motion.
Dated this 21st day of December 1893.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Manufacturing Paper.
I JAMES CRAIG of Bridge Hall Mills Bury in the County of Lancaster,
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:-
"
My invention relates to the construction of machines employed for manufacturing
paper in a continuous length, and more especially to the "wet end or wire part
of such machines; the object of the invention being to afford facility for the
adjustment of the height of the endless wire cloth upon which the pulp is fed, so
as to regulate the flow of pulp upon the wire, and the quality of the paper
produced, whilst the machine is in motion.

page_text: I would here remark that in the Provisional Specification filed with my
application for Letters Patent I described as a second part of my invention an
arrangement the object of which was to regulate the amount of "side shake"
given to such wire for the purposes of interlocking and consolidating the pulp
thereon, while the pulp is passing along on the wire, but I have since found that
such arrangement is not so new or useful as I then believed it to be, and I
therefore do not intend to describe or claim the same as forming part of my said
invention.
The nature of my invention and the manner in which the same is to be
performed or carried into practical effect will be clearly understood on reference
to the sheet of illustrative drawings hereunto annexed and the following
explanation thereof.
Fig. 1 on the drawings is a side elevation (partly in section) of the "wet end”
of a paper making machine with my improvements shown as applied thereto.
Fig. 2 is a partial transverse section of the same (through the line A-B Fig. 1)
drawn to a larger scale, and Fig. 3 is a detached vertical longitudinal section of a
detached portion thereof hereinafter more particularly referred to.
On Fig.
a is the chest which receives the pulp from the stuff chests, b the sieve
or strainer, e the agitator, and d the delivery chamber, the two (chest and delivery
chamber) being connected by a flexible pipe or trough e, to allow for the shaking
motion. is the endless wire or web passing over the rollers g and supported by
the "shake-bars" h.
"
According to my invention instead of supporting the middle part of these
"shake bars" by means of supports extending upwards from the base rails as
hitherto practised I provide the underside of the "shake bars" with stiffening
bars i. posts or blocks and tie rods to keep them rigid, and I mount the free
ends of the "shake bars upon adjustable standards m (see enlarged views Figs. 2
and 3) inside each of which is a vertical screw n capable of turning freely and
rising and falling therein. Upon the central part of this screw is mounted a worm
wheel o the boss of which is threaded like a nut working upon the screw n (see
Fig. 3).
Into this worm wheel o gears a worm p keyed upon a transverse shaft q fitted
with a hand wheel r, so that by turning this hand wheel the "shake-bars" can be
set exactly horizontal or raised or lowered at one end as may be required, to
regulate the flow of pulp on the wire or web f, and the quality of paper produced,
whilst the machine is in motion and the pulp is passing along the wire, without
any necessity for stopping the continuous action thereof.
The vertical screws n when adjusted may be fixed by tightening the set
screws 3.
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 :-
"
"
First. Imparting rigidity to the shake bars at the "wet end' of paper
making machines by means of stiffening bars, blocks, and tie-rods as herein before
described and illustrated by the drawings annexed, and
"shake-bars" upon
Secondly. I claim supporting the free ends of such
adjustable standards the height of which can be regulated at pleasure by means of
vertical screws actuated by worm gearing and a hand wheel substantially in the
manner and for the purposes hereinbefore set forth and illustrated by the drawings
annexed.