Improvements in or relating to Mixing and Kneading Machines.
Year: 1898

page_text: Date of Application, 26th Nov., 1898-Accepted, 28th Jan.,
1899
COMPLETE SPECIFICATION.
Improvements in or relating to Mixing and Kneading Machines.
I, PETER KÜPPER, of 27, Kockerellstrasse, Aix-la-Chapelle, in the Empire of
Germany, Master Baker, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to a stirring device for mixing and kneading machines,
in which a thorough mixture of the material is effected by two pairs of mixing
blades arranged one behind the other, so that their blades which intersect and
are helically bent throughout their length when rotated move the material in
both halves of the trough from the centre to the ends and vice versa, in the direc-
tion of the axis of the machine.
In the accompanying drawings,
Figure 1 shows a mixing and kneading machine according to this invention
in cross section: and
Figure 2 in longitudinal section.
The mixing blades of separate pairs A B and A B' are helically bent in oppo-
site directions and intersect the blades & passing within the blades a.
The outer mixing blades A and A' are made to fit the inner surface of the
trough as nearly as possible and push the material in a direction from the ends
of the trough towards the centre, while the two inner mixing blades B B¹ push
the material from the centre of the trough towards the ends.
The material is also moved through the whole length of the trough, since,
owing to the pairs of blades being arranged at opposite sides of the spindle and
consequently the trough being free near each pair of blades, the outer blades A A'
are enabled to push the material over the centre of the trough from one half
of the trough into the other where it then is pushed by the inner blades in the
same direction. i.e. the material which is pushed by the outer blade A over the
centre of the trough into the sphere of action of the pair of blades A' B', is
pushed by the inner blade B' of this pair in the same direction to the right hand
end wall of the trough and vice versa, the material brought by the outer blade A¹
over the centre of the trough into the sphere of action of the pair of blades A B,
is pushed by the inner blade B of the latter pair to the left hand end wall of the
ough.
The mixing blades may be also made with an uninterrupted spindle.
Having now particularly described and ascertained the nature of my said in-
Kention and in what manner the same is to be performed, I declare that what I
claim is:
1. A mixing and kneading machine characterised by two pairs of blades—an
cuter pair and an inner pair-arranged one behind the other on opposite sides
of the rotation spindle, the blades of which are helically bent in opposite direc-
tions in such manner that the material to be treated is pushed by the inner blades
from the centre towards the ends of the trough and by the outer blades in the

page_text: opposite direction from the ends towards the centre and finally by the outer blades
over the centre and thence by the inner blades towards the end walls of the
trough.
2. The combination and arrangement of parts constituting the complete mixing
and kneading machine substantially as described or illustrated in the accom
panying drawings.
1
3611
1000
BOULT & WADE,
Agents for the Applicant.