IMPROVEMENTS IN FILTER PRESSES
Year: 1884

page_text: I, BERNHARD HEINRICH REMMERS, of 189 St. Vincent Street Glasgow, in the
county Lanark, Chemical Engineer, do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN FILTER PRESSES," to be as follows:-
This Invention relates to improvements in the construction of filter presses.
To economise material and labour in forming the plates of filter presses, and to
obtain, more rapid and thorough lixiviation of the cakes formed between the plates
in using such presses, I dispense with the lugs or projections on the sides of the
plates, through which the channels are usually formed for the injection of the wash
water, and in casting the plates I form at any two corners, within the framing of
the plates, a solid thickness of metal which may be of rectangular or triangular
shape, and through which I drill or otherwise form holes or openings. When the
plates are secured together in the press these holes are in line, and form, at each
of the said corners, a continuous longitudinal channel for the lixiviating water. In
the alternate plates at each side, I form slots or openings at right angles to these
channels, and leading into the spaces between the usual perforated metal sheets of
the plates. In lixiviating or washing the cakes formed in the press, the lixiviating
water or steam is admitted to the channel on one side, the usual outlets for the
filtered liquor are closed, and the steam or water entering by the slots or openings
at one side of each plate, passes out through the usual metal perforated sheets,
through the filter cloth on cach side, thence through the cakes and through the
filter cloth on one side of each adjacent plate, and escapes by the slots or openings
formed in the adjacent plates at the opposite side, into the opposite longitudinal
channel, or out by the,cocks in these plates. After the cakes have been taken out
of the filter press, and a second filtration has been finished, the lixiviating process
is this time effected by causing the water or steam to enter the opposite channel
and openings, and to pass through the cloth and cakes in the reverse direction,
whereby the filter cloth is kept free from matters which would otherwise clog
or fill the interstices, and tend to diminish the filtering power of the cloth.
Dated this Fighth dev of February 1881

page_text: I, BERNHARD HEINRICH REMMERS, of 189 St Vincent Street Glasgow, in the
County of Lanark, Chemical Engineer, do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN FILTER PRESSES," 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 improvements in the construction of filter presses, and
is illustrated by the accompanying drawings, in which Figures 1 and 2 are
elevations, and figure 3 a vertical section of the improved plates which I employ
in the construction of filter presses.
To obtain more rapid and thorough lixiviation of the cakes formed between
the plates in using such presses, I dispense with the lugs or projections on the
sides of the plates through which the channels are usually formed for the injection
of the wash water; and in casting the plates, I form at any two corners within the
framing A of the plates, a solid thickness of metal, as at a and a¹, which may be
of rectangular or triangular shape, and through which I drill or otherwise form
holes or openings b, b. When the plates are secured together in the press, these
holes b, bare respectively in line, and form at each of the said corners, a con-
tinuous longitudinal channel for the lixiviating water. In the alternate plates at
each side, I form slots or openings as indicated by dotted lines at right angles to
these channels, and leading into the spaces c between the usual perforated metal
sheets d of the plates. In lixiviating or washing the cakes formed in the press,
the lixiviating water or steam is admitted to the channel on one side, the usual
outlets D for the filtered liquor are closed, and the steam or water entering by the
slots or openings b from the channels at one side of each alternate plate, passes out
through the usual metal perforated sheets & through the filter cloth on each side,
thence through the cakes and through the filter cloth on one side of each adjacent
plate, and escapes by the slots or openings formed in the adjacent plates at the
opposite side, into the opposite longitudinal channel b¹ or out by the cocks D in
these plates. After the cakes have been taken out of the filter press, and a second
filtration has been finished, the lixiviating process is this time effected by causing
the water or steam to enter the opposite channel b', and to pass through the cloth
and cakes in the reverse direction, whereby the filter cloth is kept free from
matters which would otherwise clog or fill the interstices, and tend to diminish
the filtering power of the cloth..
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is,―
The arrangement of the rectangular pieces, channels and slots a, a, b, b¹ at any
two corners of the plates of filter, presses, substantially as and for the purpose
berein set forth,
Dated this month day of Novembou 100 A

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