Improvements in Coffee Pulping Machines.
Year: 1895

page_text: Date of Application, 7th Oct., 1895
Complete Specification Left, 3rd July, 1896-Accepted, 8th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in Coffee Pulping Machines.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, (a communi-
cation to me from abroad by Marcus Mason and Company, of 333 Produce
Exchange, New York, United States of America,) do hereby declare the nature
of this invention to be as follows:-
The improvements in pulping machines forming the subject of this invention
relato to a novel construction of the cylinder, the same consisting in providing the
cylinder with abrading pegs, the parts that project from the cylinder being enlarged
or formed as beads with their shoulders resting against the surface of the cylinder,
thereby preventing the displacement of the pegs by the depression of them within
the cylinder by reason of stones or other haid substances mixed with the coffee
cherries to be pulped, as would happen if said pegs were of uniform Bize throughout
their length; these pegs have their heads preferably formed conoidal in shape, and
to insure a perfect gripping and abrading action on the coffee cherries, the ends of
the peg heads are scored on cut with star or cross-shaped depressions, and the
invention also contemplates the use of a punch or tool having corespondingly star
or cross-shaped cutting edges adapted to be used to recut the abrading ends of the
pegs when they become worn without removing the cylinder from the machine, the
shoulders under the heads forming a solid scat for such operation to be performed
without disturbing or changing the positions of the pegs.
n
Another novel feature in this class of machine, consists in utilizing the water
pipes, which supply water for washing the pulp from the coffee berries as they
leave the machines, as a means of support for the screen or sieve upon which the
berries and pulp are washed and separated, said screen being supported by the pipe
frame by means of swinging rods.
These and other features of construction in coffee pulping machines will be now
fully described, referring to the drawings forming part of this specification, in
which,
Figure 1 is a side elevation of my improved coffee pulper;
Figure 2 a front elevation;
Figure 3 is a vertical section of the same on the line 3, 3, of Figure 2;
Figure 4 is a section of part of the cylinder on an enlarged scale;
Figure 5 a plan of the washing pipes, used as a support for the screen, on a
educed scale;
Figure 6 18 an elevation and plan of one of the abrading pins; and
Figure 7 is an elevation and end view of the punch or tool for cutting or forming
the ends of the pins.
The active or main working part of the machine is a plain hollow cylinder a, as
shown at Figure 3, having radial holes a' a' drilled or otherwise formed through
its shell, as shown at Figure 4 The pegs which are seated in these holes are, as
clearly shown at Figure 4 and Figure 6, composed of straight shauks bb made to
fit tightly in the holes a' a' and conoidal shaped heads bb, the shoulders of which
rest on the surface of the cylinder a when the pegs are driven home therein. In
the ends of the peg heads are formed cross cuts or depressions, two being shown in
the drawings and to form these cuts I have devised a special simple tool which
I will now describe. This tool consists of a piece of steel c, having grooves formed

page_text: edges c¹ o¹, said cutting edges being inclined inwardly, as shown, so that a firm
grip on the heads of pegs 18 had when the tool is being used to cut or reset
the pegs.
The shaft a² of the cylinder a is fitted to rotate in bearings in the side frames d
aud d', which are secured together by bolts and by the guider d. These frames
carry the lower half e of the case, the bottom of which 18 provided with an opening
for the discharge of the water fed into the machine with the coffee cherries, and
for discharge of such of the pulp as passes by the breast of the machine. The
upper half of the case is hinged to the lower half e, at e, a space being left
between the two halves of the case in front of the pulping cylinder for tho
admission of the breast piece, which will be hereafter described. In the upper
part of the top half e¹ of the case is formed the hopper e into which the coffee
cherries are fed and over the edge of which said coffee cherries are washed on to
the front side of the cylinder by the water supplied to the hopper. When it is
desired to reset oi sharpen the abrading pegs of the cylinder a, the upper half of
the case is thrown back on the hinge and the tool c applied to the pegs whilst
the cylinder a is in its working position in the machine. The breast fis formed to
fit into the opening between the parts e and e¹ of the case, its inner face 15 curved
to correspond to cm vature of the cylinder, and it has formed through it curved and
inclined passages, the curved sides of the adjacent passages meeting at points,
thereby allowing the coffee cheries to pass freely down end passages
These
openings in the breast are closed by the plates gg, all but then lower ends which
are left free as openings for the discharge of the coffee bees and pulp from
the machine. The plates 9 g are hinged at then upper ends to the breast at g²²,
and their lover ends are controlled, so as to be adjustable to and from the
cylinder, by the thumb scrows hk, which pass through the bai h¹ secured to the
front of the beast f, and which are locked by the nuts when the plates g g are
properly set.
The breasts held in position by lugs on its ends seated in eresses formed in
the frames d and d' and is pressod towards the cylinder aby bolts 1, which pass
through caps fitted over the recesses of the fiammes and the ends of which butt
against the lugs of the breast. The bolts or screws are for the purpose of
setting or levelling the breast f
It will thus be seen that the space between the moving abiading teeth on pegs
of the cylinder and the counter walls of the bicast may be varied as desued to
cause the proper cinahing and rubbing action on the coffee cherries to take place.
Projecting upwardly from the frames d and dare the bracket arms and these
carry the rectangular system of water pipes, the two front transverse branches & ¹
of which are provided with jets or spouts set to duect streams of water in a
downwardly direction The cock regulates the flow of water these pipes
In front of and below the discharge openings g' g' 18 ni ranged the screen / set in
a slightly angular position, and the ease or receptacle is attached to the screen
to catch the coffee beans which pass therethrough, said screen being of such a
mesh as to admit of the passage of the beans but to retain the pulp washed from
the beans by the streams of water from the jets the pulp and unpulped beries
being discharged from the end of the Eci cen. The lower central part of the case
or receptacle has an opening 1 for the discharge of the beans therefiom.
The screen is supported by four swinging bars m m and nn pivotted at their
lower euds to the sides of the screen 1, the upper onds of the bars m m being
pivotted to the part el of the case, and the upper ends of the bars nn being
pivotted to slotted arms o o' secured to outer transverse bianch A' of the rectangular
system of water pipes. The water pipes are thus caused to perform a useful
function besides supplying the washing water, and obviate the necessity of
employing a special support for the outer ond of the screen. The object of the
slotted arms o o' is to permit of the adjustment of the front supporting pivots of
the scicen in different jo ations, thus allowing the inclination of the screen to be
varied at pleasure.

page_text: The screen is oscillated to facilitate the separation of the coffee beans from the
pulp and unpulped cherries and the discharge of the pulp and pulped cherries
therefrom, by means of the eccentrics p, p, carried by the shaft p, the eccentrics
being connected by then connecting rods qg to the sides of the screen, and motion
imparted to them from the shaft of the cylinder a through the medium of the
sprocket wheels and chain. Powci is applied to rotate the cylinder a
through the medium of a belt acting on the pulleys, secured to the shaft of the
cylinder.
Dated flus 7th day of October 1895.
Improvements in Coffee Pulping machines.
1, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman, (a cominuni-
cation to me from abroad by Maicus Mason and Company, of 333 Produce
Exchange, New York, United States of America,) 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 improvements in pulping machines forming the subject of this invention
relate to a novel construction of the cylinder, the same consisting in providing
the cylinder with abiading pegs, the parts that project from the cylinder being
enlarged or formed as heads with the shoulders resting against the surface of
the cylinder, thereby preventing the displacement of the pegs by the depression
of them within the cylinder by reason of stones or other hard substances mixed
with the coffee cherries to be pulped, as would happen if said pegs were of
uniform size throughout their length, these pegs have their heads preferably
formed conoidal in shape, and to insure a perfect gupping and abrading action
ou the coffee cherries, the ends of the peg heads are scored or cut with star or
cross-shaped depressions, and the invention also contemplates the use of a punch
or tool having correspondingly star o cross-shaped cutting edges adapted to be
used to iecut the abrading ends of the pegs when they become worn without
removing the cylinder from the machine, the shoulders under the heads forming
a solid seat for such operation to be poi formed without disturbing or changing
the positions of the pegs.
Another novel feature in this class of machine, consists in utilising the water
pipes, which supply water for washing the pulp from the coffee berries as they
leave the machines, as a means of support foi the screen or sieve upon which
the berries and pulp are washed and sepniated, said scicen being supported by the
pipe frame by means of swinging rods.
These and other features of construction in coffee pulping machines will be now
fully described refering to the drawings left with the Provisional Specification
and forming part of this specification, in which
Figure 18 a sido elevation of my improved coffee pulper.
Figure 2 a front elevation.
Figure 3 is a vertical section of the same on the line 3, 3 of Figure 2;
Figure 4 is a section of part of the cylinder on an enlarged scale;
Figure 5 a plan of the washing pipes, used as a support for the screen, on a
reduced scale,
pins;
and
Figure 6 is an elevation and plan of one of the abrading
Figure 7 18 an elevation aud end view of the punch or tool for cutting or forming
the ends of the pins.
The active or main working part of the machine is a plain hollow cylinder a, as
shown at Figure 3, having radial holes a' a' drilled or otherwise formed through

page_text: its shell, as shown at Figuro 4. The pegs which are seated in these holes are as
clearly shown at Figue 4 and Figure 6, composed of straight shanks bb made to
fit tightly in the holes a' a' and conoidal shaped heads, the shoulders of which
rest on the surface of the cylinder a when the pegs are driven home therein. In
the ends of the peg heads are formed cross cuts or depressions, two being shown in
the drawings and to form these cuts 1 have devised a special simple tool which I
will now describe. This tool consists of a piece of steel c, having grooves formed
in one end in such manner that then meeting edges constitute the cutting edges o' c',
said cutting edges being inclined inwardly, as shown, so that a firm grip on the
heads of pegs is had when the tool is being used to cut or reset the pegs.
The shaft a of the cylinder a 1s fitted to rotate in beatings in the side frames d
and d, which are secured together by bolts and by the guder d. These frames
carry the lower half e of the case, the bottom of which is provided with an opening
for the discharge of the water fed into the machine with the coffee cherries and for
discharge of such of the pulp as passes by the breast of the machine. The upper
half e' of the case is hinged to the lower half e, at es, a space being left between the
two halves of tho case in front of the pulping cylinder for the admission of the
breast piece, which will be horeafter described In the upper part of the top
half of the case is formed the hopper e into which the coffee cherries are fed
and over the edge of which sand coffee cheries are washed on to the front side of
the cylinder by the water supplied to the bopper. When it is desued to reset or
sharpen the abrading pegs of the cylinder a, the upper half of the case is thrown
back on the binge and the tool e applied to the pegs whilst the cylinder a 13 in
its working position in the machine. The bienst is formed to fit into the opening
between the parts e and e' of the case, its une face is curved to correspond to
curvature of the cylinder, and it has formed through it curved and inclined
passages, tho curved sides of the adjacent passages meeting at points, thereby
allowing the coffee cheries to pass freely down said passages
These openings in
the breast fare closed by the plates 9 g, all but their lower cnds which are left free
as openings gg for the discharge of the coffee berries and pulp from the machine.
The plates g g are hinged at then upper ends to the breast fat g', and their
lower ends are controlled, so as to be adjustable to and from the cylinder a, by the
thumb screws hh, which pass through the bar' secured to the front of the breast f,
and which are locked hy the nuts when the plates g, g are properly set
The bicast is held in position by lugs on its ends seated in recesses formed in
the frames d and d' and is pressed towards the cylinder a by bolts, which pass
through caps fitted over the recesses of the fiames and the ends of which butt
against the lugs of the breast. The bolts or screws are for the purpose of
setting or levelling the breast.
It will thus be seen that the space between the moving abrading teeth or pegs of
the cylinder and the counter walls of the breast may be varied as desired to cause
the proper crushing and rubbing action on the coffee cheries to take place.
Projecting upwardly from the frames d and d' are the bracket arms and these
carry the rectangular system of water pipes, the two fiont transverse branches kk'
of which are provided with jets or spouts AA set to direct streams of water in a
downwardly duection The cock regulates the flow of water in these pipes.
In front of and below the discharge openings g1 g 13 ai ranged the screen / set in
a slightly, angular position, and the case or receptacle is attached to the screen
to catch the coffee beans which pass therethrough, said screen being of such a inesh
as to admit of the passage of the beans but to retain the pulp washed from the
beans by the streams of water from the jets, the pulp and unpulped berries
being discharged from the end of the screen. The lower central part of the case
or receptacle has an opening for the discharge of the beans therefrom.
The screen is supported by four swinging bats mm² and n n' pivoted at their
lower ends to the sides of the screen 1; the upper ends of the bars m m being
pivoted to the part of the case, and the upper ends of the bars n n' being pivotted
to slotted arms o o' secured to outer transverse branch of the rectangular system

page_text: of water pipes. The water pipes are thus caused to perform a useful function
besides supplying the washing water, and obviate the necessity of employing a
special support for the outer end of the screen. The object of the slutted arms o o'
is to permit of the adjustment of the front supporting pivots of the screen in
different positious, thus allowing the inclination of the screen to be varied at
pleasure.
The screen is oscillated to facilitate the separation of the coffee beans from the
pulp and unpulped cherries and the discharge of the same therefrom by means of
the eccentrics pp, carried by the shaft p', the eccentrics being connected by their
connecting rods 99 to the sides of the screen, and motion imparted to them from
the shaft of the cylinder a through the medium of the sprocket wheels rr' and
chain Power is applied to rotate the cylinder a through the medium of a belt
acting on the pulleys, secured to the shaft of the cylinder.
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 18:-
1. A pulping cylinder for coffee pulping machines consisting of a metal cylinder
having holes formed radially therein, in combination with pegs having ularged
conoidal shaped heads, the shanhs of the pegs being fitted in the holes and the
shoulders of the heads resting against the surface of the cylinder.
2. A pulping cylinder for coffee pulping machines, consisting of a metal cylinder
having holes formed radially therein, in combination with pegs having enlarged
conoidal shaped heads, the shanks of the pegs being Gtted in the holes and the
shoulders of the heads resting against the surface of the cylinder, and the ends
of the heads of the pegs having star or cross shaped abrading depressions.
3. In a coffee pulping machine, the combination of a pulping cylinder, a casing
in which it is hold, discharge openings in the casing, a sieve or screen in frout
of the discharge openings, a frame composed of pipes connected to a source of
water supply and provided with jet nozzles arranged to direct water on to the
screen, links or iods connecting the screen to the pipe frame, and means for
rocking the screen, the combination being such that the water pipes act as a
support for the screen.
4. In a coffee pulping machine, the combination of a pulping cylinder, a casing
in which it is held, discharge openings in the casing, a sieve or screen in front
of the discharge openings, a frame composed of pipes connected to a source of
water supply and provided with jet nozzles to direct water on to the screen,
adjustable links or rods connecting the outer end of the screen to the pipe frame,
whereby the inclination of the screen may be varied, and means for rocking the
screen, the combination being such that the water pipes act as a support for the
screen.
5. In a coffee pulping machine, the combination of a cylinder, abrading pegs
having enlarged heads seated in holes therein, a case enclosing the cylinder and
provided with bearings in which the shaft of the cylinder rotates, a breast piece
attached to and forming part of the case, adjustably held in relation to the
cylinder, and having inclined passage ways formed therein, and coverings or backs
for said passage ways adjustably connected to the breast piece.
6. Coffee pulping machines substantially as described and shewn in the
diawings.
Dated this 17th day of June 1806