Title of Invention	A PRESS CAGE BAR FOR A DEVICE FOR EXPRESSING LIQUIDS
Abstract	The invention relates to a press cage bar for a device for expressing liquids, which is bounded by at least one pressing edge in the area of a wear surface of a hard layer and which, in the area of at least one lateral face of the body of the cage bar, has at least one spacer that is raised above the lateral face. The spacer is formed as a deposit weld on the lateral face of the cage bar and is provided with certain bottom clearance from the underside of the cage bar, which is on the opposite side of the cage bar from the wear surface. Yhe space extends along the lateral face no farther than to the hard layer. The extent of the spacer transversely to a longitudinal axis of the lateral face is greater than its extent in the direction of the longitudinal axis of the lateral face. The spacer has increasing thickness perpendicular to the lateral face in a direction extending from the hard layer towards the underside of the cage bar.

Title of Invention

A PRESS CAGE BAR FOR A DEVICE FOR EXPRESSING LIQUIDS

Abstract

The invention relates to a press cage bar for a device for expressing liquids, which is bounded by at least one pressing edge in the area of a wear surface of a hard layer and which, in the area of at least one lateral face of the body of the cage bar, has at least one spacer that is raised above the lateral face. The spacer is formed as a deposit weld on the lateral face of the cage bar and is provided with certain bottom clearance from the underside of the cage bar, which is on the opposite side of the cage bar from the wear surface. Yhe space extends along the lateral face no farther than to the hard layer. The extent of the spacer transversely to a longitudinal axis of the lateral face is greater than its extent in the direction of the longitudinal axis of the lateral face. The spacer has increasing thickness perpendicular to the lateral face in a direction extending from the hard layer towards the underside of the cage bar.

Full Text	FIELD OF THE INVENTION The invention relates to a press cage bar for a device for expressing liquids* which is bounded by at least one pressing edge in the area of a wear surface of a hard layer and which* in the area of at least one lateral face of the body of the cage bar, has at least one spacer that is raised above the lateral face. The invention also relates to a device for expressing liquids, which has at least one press cage bar* which is bounded by at least one pressing edge in the area of a wear surface of a hard layer and which, in the area of at least one lateral face of the body of the cage bar, has at least one spacer that is raised above the lateral face. BACKGROUND OF THE INVENTION Press cage bars of the aforementioned type are used as devices for expressing liquids from material placed in the device. It can be used, for example* to express liquid substances from animal carcasses, offal, or oil-bearing fruits. io 1. The pressing devices have a drum-like design, and the press cage bars extend in the longitudinal direction of the drum. The substances to be processed are conveyed in this longitudinal direction. The residual materials are discharged in a practically moisture-free state from the inside of the drum at a drum discharge opening. The material is conveyed through the drum by a pressure and conveying screw. During the conveyance of the materials through the drum, the liquids contained in the feed materials are expressed by the pressing operation between the contact surfaces of the screw channels of the conveying screw and the cage bars. To allow the expressed liquids to flow off, the cage bars are spaced apart to form drainage slits between them. To ensure optimum flow of the pressing operation, the cross-sectional area of the screw channel decreases from the inlet to the outlet. The slits between the press cage bars are usually preset by spacers. In accordance with previously known embodiments, the spacers are, for example, placed manually as thin spacer plates; it is also already well known that thin spacer plates of this type can be joined with the cage bars by spot welding. However, due to the considerable forces that act during the pressing operation, these methods of installation of the spacers have the disadvantage that he spacers can be caused to slip, which can result in complete detachment of the cage bars and can cause the spacers to fall out. The use of spot welding also fails to provide adequate protection against slipping due to the danger of the welds tearing off. In accordance with another well-known production method, the spacers are formed as single pieces with the cage bars and are produced by removing the excess material by milling or grinding. This production method prevents slipping and produces a high degree of stability of the overall device. However, in view of the large number of press cage bars that are used, this significantly increases production costs compared to the use of loose spacers. It is already known from DE 298 11 871 Ul that cage bars can be provided with spacers that have increasing thickness starting from a wear surface and moving towards an underside of the body of the cage bar. In addition, the wear surface also has an inclined orientation. It is known from DE 201 04 282 Ul that rivets with angled heads can be placed in a cage bar in such a way that they form spaces. The rivets have round-contoured rivet heads and are dimensioned in such a way that the rivet heads are spaced some distance from both the wear surface and an underside of the body of the cage bar. US Patent 3,126820 describes the installation of a plurality of cage bars in a pressing device. In this case, the spacers are provided with projecting stubs that fit into blind holes in the cage bars. OBJECTS OF THE INVENTION The objective of the present invention is to design a press cage bar of the aforementioned type in a way that is conductive to both a high degree of utility and economical manufacturing. SUMMARY OF THE INVENTION In accordance with the invention this objective is achieved by forming the spacer as a deposit weld on the lateral face of the cage bar in such a way that the spacer is provided with a certain bottom clearance from the underside of the cage bar, which is on the opposite side of the cage bar from the wear surface, that it extends along the lateral face no farther than to the hard layer, that its extent transversly to a longitudinal axis of the lateral face is greater than its extent in the direction of the longitudinal axis of the lateral face; and that it has increasing thickness perpendicular to the lateral face in a direction extending from the hard layer towards the underside of the cage bar. A further objective of the present invention is to design a device of the aforementioned type in such a way that a. high degree of operating reliability is achieved at a favorable manufacturing cost. In accordance with the invention, this objective is achieved by forming the spacer as a deposit weld on the lateral face of the cage bar in such a way that the spacer is provided with a certain bottom clearance from the underside of the cage bar, which is on the opposite side of the cage bar from the wear surface; that it extends along the lateral face no farther than to the hard layer; that its extent transversely to a longitudinal axis of the lateral face is greater than its extent in the direction of the longitudinal axis of the lateral face; and that it has increasing thickness perpendicular to the lateral face in a direction extending from the hard layer towards the underside of the cage bar. A design that is inexpensive to manufacture and at the same time is highly functional is provided by the combination of the feature of a spacer realized as a deposit weld and the feature of the elongated formation of the deposit weld transversely to the longitudinal direction of the cage bar and by the clearance both between the spacer and the wear surface and between the spacer and the underside of the cage bar. The clearance between the spacer and the hard layer prevents the occurrence of negative effects on the material properties of the hard layer when the spacer is mounted. In particular, it is critical that local heating of the hard layer be prevented, since this can cause stresses, cracking or embrittlement. Furthermore, in the event of clogging or reduction of the cross section of the drainage channels formed between the spacers, the clearances that are provided allow the draining liquid to be conveyed in the area of an adjacent drainage channel. The term liquids is understood to include substances with flowable, pasty or dispersive consistencies. In addition, the formation of the spacers as deposit welds produces a strong connection between the spacers and the body of the cage bar, so that the spacers cannot fall off or slip. Due to the increasing thickness of the spacers in the direction extending from the hard layer towards the underside of the cage bar, an angle of inclination of the spacers is produced that allows a plurality of spacers to be positioned with precise fitting along the inner contour of a press drum. It is conducive to favorable flow behavior for the spacer to have top clearance from the hard layer. Providing the end of the spacer that faces the hard layer with a rounded contour also contributes to low flow resistance. Further optimization of the flow behavior can be obtained by providing the end of the spacer that faces away from the hard layer with a rounded contour. An especially advantageous type of shaping consists in contouring the spacer essentially as an elongated oval. Optimum mutual support of the cage bars can be achieved by grinding the surface of the spacer that faces away from the lateral face. Adaptation to the usual directions of flow can be achieved if the longitudinal axis of the spacer extends essentially transversely to the longitudinal axis of the lateral face. To ensure optimum support of the spacers, it is proposed that at least two spacers be arranged spaced apart on the lateral face. A high-strength design is produced if the spacer is made of a material that contains chromium carbide. Specific embodiments of the invention are illustrated schematically in the drawings. BRIEF DESCRIPTION OF THE ACC0MPANYIN6 DRAWINGS — Figure 1 shows a partially interrupted side view of a framework for the cage bars. — Figure 2 shows a schematic view of a drum half of a pressing device with the cage bars inserted. — Figure 3 shows a scaled-down view from viewing direction III in Figure 2. — Figure 4 shows an enlarged perspective view of a cage bar with spacers. — Figure 5 shows two cage bars according to Figure 4 arranged side by side. — Figure 6 shows a modified view of another cage bar. — Figure 7 shows two cage bars according to Figure 6 arranged side by side. DETAIL DESCRIPTION OF THE INVENTION Figure 1 shows a partially interrupted view of a framework (1) for cage bars of a pressing device (2) for expressing liquid substances from feed materials. The substances are conveyed along the longitudinal axis (3) of the drum from a material inlet (4) towards a dry substance outlet (5>. Figure 2 shows a cross section through a drum half (6) of the pressing device (2). The drawing reveals that a plurality of cage bars (8) are arranged along a radial circumference of the drum interior (7). The view in Figure 3 shows that the longitudinal axes (9) of the cage bars (8) extend essentially parallel to the longitudinal axis (3) of the drum. Both Figure 2 and Figure 3 show that the cage bars (8) are very closely arranged relative to one another. The design of the cage bars (8) is further illustrated by the enlarged view in Figure 4. The drawing shows that each cage bar (8) consists of a body (10) and a wear surface (11). The wear surface (11) is bounded by a pressing edge (12). As Figure 5 shows, the wear surfaces (11) of adjacent cage bars (8) are inclined relative to each other in such a way that, in the direction of rotation (13), the pressing edge (12) of a following cage bar (8) projects above the wear surface (11) of the preceding cage bar (8). As a result, the interior (7) of the drum is bounded by a finely stepped surface. In particular, it is intended that the pressing edges (12) should be very sharp-edged. In the illustrated embodiment, the pressing edge (12) is arranged in the area of a hard layer (14), which is welded onto the body (10) of the cage bar. In principle, however, it is possible to arrange the pressing edge (12) directly on a body (10) made of a hardened material. Figure 5 likewise illustrates that the cage bars (8) are supported relative to each other by spacers (15) and that a space (16) extends between each two adjacent cage bars (8), through which expressed liquid can emerge from the interior (7) of the drum. To assist the drainage of the expressed liquid, it is intended especially that the space (16) should be designed to widen in the direction from the pressing edge (12) towards the undersides (17) of the cage bars (8). Figure 4 shows that several spacers (15) are arranged spaced apart one after another in the direction of the longitudinal axis (9) of the bar. The spaces (16) are thus divided into space segments (18), which help the expressed liquid to drain off. Figure 4 illustrates a design of the spacers (5) in which the spacers (15) do not extend over the entire height of the body (10) of the cage bar. The partial extent over the height of the cage bars (8) that is illustrated in Figure 4, with clearance from both the wear surface (11) and the underside (17) of the cage bar, results in especially effective drainage of the expressed liquid, since in the event of complete or partial clogging of individual space segments (18), liquid can overflow into adjacent space segments. Therefore, a local obstruction does not cause a significant increase in the total effective flow resistance. The spacers (15) can be mounted on the body (10) of the cage bar by various methods. For example, the spacer (15) can be applied by deposit welding on the body (10) of the cage bar. In particular, using the hard material of the cage bars (8) from the area of the wear surface (11) or the hard layer (14) as the material for the spacers (15) contributes to a high degree of stability. Figure 4 also illustrates that a certain amount of top clearance (19) is provided between the spacers and the hard layer (14) and that a certain amount of bottom clearance (20) is provided between the spacers (15) and the underside (17) of the cage bar. The top clearance (19) ensures that even in the event of use-related wear of the hard layer (14), a sufficient distance from the wear surface (11) remains. Perpendicular to the lateral face (21) of the cage bar (8), the spacers (15) have a thickness (22) that is smaller in the area of the ends of the spacers (15) that face the hard layer (14) than in the area of the ends of the spacers (15) that face the underside (17) of the cage bar. This allows the oblique mutual support of the cage bars (8) that is illustrated in Figure 5. In particular, it is intended that the spacers (15) be deposit-welded on the lateral faces (21) with an initially essentially constant thickness, and that the inclination then be produced by grinding according to the specific application geometry. This allows inexpensive production of a large number of standardized cage bars (8). The final geometry is then produced according to the specific application requirements shortly before delivery with comparatively little production expense. This helps achieve low production costs, small inventories, and short delivery times. The modified drawing in Figure 6 again illustrates the thickness (22) of the spacers (15) and now further illustrates a spacer separation (23), by which the spatial dimensioning of the space segments (18) is determined. Between the spacers (15), the space segments (18) have cross-sectional areas (24) that increase from the hard layer (14) towards the underside (17) of the cage bar. A cross-sectional area of the cage bar (8) has an essentially rectangular shape and deviates from this rectangular shape only in the area of the inclination at the wear surface (11). In a slightly modified drawing, Figure 7 is essentially the same as Figure 5. WE CLAIM: i. A press cage bar for a device for expressing liquids, which is bounded by at least one pressing edge in the area of a wear surface of a hard layer and which* in the area of at least one lateral face of the body of the cage bar, has at least one spacer that is raised above the lateral face, wherein the spacer (15 is formed as a deposit weld on the lateral face (21) of the cage bar (8); that the spacer (15) is provided with a certain bottom clearance (20) from the underside (17) of the cage bar (8), which is on the opposite side of the cage bar from the wear surface (11); that the spacer (15) extends along the lateral face (21) no farther than to the hard layer (14); that the extent of the spacer (15) transversely to a longitudinal axis (9) of the lateral face (21) is greater than its extent in the direction of the longitudinal axis (9) of the lateral face (21); and that the spacer (15) has increasing thickness (22) perpendicular to the lateral face (21) in a direction extending from the hard layer (14) towards the underside (17) of the cage bar (8), wherein the surface of the spacer (13) that faces away from the lateral face (21) is ground, wherein a cross sectional surface of the cage bar is contoured so that the spacing region between neighbouring cage bars extends from the hard layer in the direction of the underside. 2. The press cage bar as claimed in claim 1* wherein the spacer (15) has a certain amount of top clearance (19) from the hard layer (14). 3. The press cage bar as claimed in claim 1* wherein the end of the spacer (15) that faces the hard layer (14) has a rounded contour. 4. The press cage bar as claimed in claim 1, wherein the end of the spacer (15) that faces away from the hard layer (14) has a rounded contour. 5. The press cage bar as claimed in claim 1, wherein the spacer (15) has an essentially elongated oval shape. 6. The press cage bar as claimed in claim 1, wherein the longitudinal axis of the spacer (15) extends essentially transversely to the longitudinal axis of the lateral face (21). 7. The press cage bar as claimed in claim 1, wherein at least two spacers are arranged on the lateral face (21) with a separation (23) between them. 8. The press cage bar as claimed in claim 1, wherein the spacer (15) is made of a material that contains chromium carbide. 9. A device for expressing liquids, which has at least one press cage bar,('which is bounded by at least one pressing edge in the area of a wear surface and which, in the area of at least one lateral face of the body of the cage bar, has a least one spacer that is raised above the lateral face* wherein the spacer (15) is formed as a deposit weld on the lateral face (21) of the cage bar (8); that the spacer (15) is provided with a certain bottom clearance (20) from the underside (17) of the cage bar (8)* which is on the opposite side of the cage bar from the wear surface (11); that the spacer (15) extends along the lateral face (21) no farther than to the hard layer (14)5 that the extent of the spacer (15) transversely to a longitudinal axis (9) of the lateral face (21) is greater than its extent in the direction of the longitudinal axis (9) of the lateral face (21)? and that the spacer (15) has increasing thickness (22) perpendicular to the lateral face (21) in a direction extending from the hard layer (14) towards the underside (17) of the cage bar (8), wherein the surface of the spacer (15) that faces away from the lateral face (21) is ground, wherein a cross sectional surface of the cage bar is contoured so that the spacing region between neighbouring cage bars extends from the hard layer in the direction of the underside. 10. The device as claimed in claim 9» wherein the spacer (15) has a certain amount of top clearance (19) from the hard layer. 11. The device as claimed in claim 9, wherein the end of the spacer (15) that faces the hard layer (14) has a rounded contour. 12. The device as claimed in claim 9, wherein the end of the spacer (15) that faces away from the hard layer (14) has a rounded contour. 13. The device as claimed in claim 9, wherein the spacer (15) has an essentially elongated oval shape. 14. The device as claimed in claim 9, wherein the longitudinal axis of the spacer (15) extends essentially transversely to the longitudinal axis of the lateral face (21). 15. The device as claimed in claim 9, wherein at least two spacers are arranged on the lateral face (21) with a separation (23) between them. 16. The device as claimed in claim 9, wherein the spacer (15) is made of a material that contains chromium carbide. The invention relates to a press cage bar for a device for expressing liquids, which is bounded by at least one pressing edge in the area of a wear surface of a hard layer and which, in the area of at least one lateral face of the body of the cage bar, has at least one spacer that is raised above the lateral face. The spacer is formed as a deposit weld on the lateral face of the cage bar and is provided with certain bottom clearance from the underside of the cage bar, which is on the opposite side of the cage bar from the wear surface. Yhe space extends along the lateral face no farther than to the hard layer. The extent of the spacer transversely to a longitudinal axis of the lateral face is greater than its extent in the direction of the longitudinal axis of the lateral face. The spacer has increasing thickness perpendicular to the lateral face in a direction extending from the hard layer towards the underside of the cage bar.

Full Text

FIELD OF THE INVENTION
The invention relates to a press cage bar for a device for
expressing liquids* which is bounded by at least one pressing
edge in the area of a wear surface of a hard layer and which* in
the area of at least one lateral face of the body of the cage
bar, has at least one spacer that is raised above the lateral
face.
The invention also relates to a device for expressing
liquids, which has at least one press cage bar* which is bounded
by at least one pressing edge in the area of a wear surface of a
hard layer and which, in the area of at least one lateral face of
the body of the cage bar, has at least one spacer that is raised
above the lateral face.
BACKGROUND OF THE INVENTION
Press cage bars of the aforementioned type are used as
devices for expressing liquids from material placed in the
device. It can be used, for example* to express liquid substances
from animal carcasses, offal, or oil-bearing fruits.
io
1.
The pressing devices have a drum-like design, and the press cage
bars extend in the longitudinal direction of the drum. The
substances to be processed are conveyed in this longitudinal
direction. The residual materials are discharged in a
practically moisture-free state from the inside of the drum at a
drum discharge opening. The material is conveyed through the
drum by a pressure and conveying screw.
During the conveyance of the materials through the drum,
the liquids contained in the feed materials are expressed by the
pressing operation between the contact surfaces of the screw
channels of the conveying screw and the cage bars. To allow the
expressed liquids to flow off, the cage bars are spaced apart to
form drainage slits between them. To ensure optimum flow of the
pressing operation, the cross-sectional area of the screw
channel decreases from the inlet to the outlet.
The slits between the press cage bars are usually preset by
spacers. In accordance with previously known embodiments, the
spacers are, for example, placed manually as thin spacer plates;
it is also already well known that thin spacer plates of this
type can be joined with the cage bars by spot welding. However,
due to the considerable forces that act during the pressing
operation, these methods of installation of the spacers have the
disadvantage that he spacers can be caused to slip, which can
result in complete detachment of the cage bars and can cause the
spacers to fall out. The use of spot welding also fails to
provide adequate protection against slipping due to the danger
of the welds tearing off.
In accordance with another well-known production method,
the spacers are formed as single pieces with the cage bars and
are produced by removing the excess material by milling or
grinding. This production method prevents slipping and produces
a high degree of stability of the overall device. However, in
view of the large number of press cage bars that are used, this
significantly increases production costs compared to the use of
loose spacers.
It is already known from DE 298 11 871 Ul that cage bars
can be provided with spacers that have increasing thickness
starting from a wear surface and moving towards an underside of
the body of the cage bar. In addition, the wear surface also
has an inclined orientation.
It is known from DE 201 04 282 Ul that rivets with angled
heads can be placed in a cage bar in such a way that they form
spaces. The rivets have round-contoured rivet heads and are
dimensioned in such a way that the rivet heads are spaced some
distance from both the wear surface and an underside of the body
of the cage bar.
US Patent 3,126*820 describes the installation of a
plurality of cage bars in a pressing device. In this case, the
spacers are provided with projecting stubs that fit into blind
holes in the cage bars.
OBJECTS OF THE INVENTION
The objective of the present invention is to design a
press cage bar of the aforementioned type in a way that is
conductive to both a high degree of utility and economical
manufacturing.
SUMMARY OF THE INVENTION
In accordance with the invention* this objective is achieved
by forming the spacer as a deposit weld on the lateral face of
the cage bar in such a way that the spacer is provided with a
certain bottom clearance from the underside of the cage bar,
which is on the opposite side of the cage bar from the wear
surface, that it extends along the lateral face no farther than
to the hard layer, that its extent transversly to a longitudinal
axis of the lateral face is greater than its extent in the
direction of the longitudinal axis of the lateral face;
and that it has increasing thickness perpendicular to the
lateral face in a direction extending from the hard layer
towards the underside of the cage bar.
A further objective of the present invention is to design a
device of the aforementioned type in such a way that a. high
degree of operating reliability is achieved at a favorable
manufacturing cost.
In accordance with the invention, this objective is
achieved by forming the spacer as a deposit weld on the lateral
face of the cage bar in such a way that the spacer is provided
with a certain bottom clearance from the underside of the cage
bar, which is on the opposite side of the cage bar from the wear
surface; that it extends along the lateral face no farther than
to the hard layer; that its extent transversely to a
longitudinal axis of the lateral face is greater than its extent
in the direction of the longitudinal axis of the lateral face;
and that it has increasing thickness perpendicular to the
lateral face in a direction extending from the hard layer
towards the underside of the cage bar.
A design that is inexpensive to manufacture and at the same
time is highly functional is provided by the combination of the
feature of a spacer realized as a deposit weld and the feature
of the elongated formation of the deposit weld transversely to
the longitudinal direction of the cage bar and by the clearance
both between the spacer and the wear surface and between the
spacer and the underside of the cage bar. The clearance between
the spacer and the hard layer prevents the occurrence of
negative effects on the material properties of the hard layer
when the spacer is mounted. In particular, it is critical that
local heating of the hard layer be prevented, since this can
cause stresses, cracking or embrittlement. Furthermore, in the
event of clogging or reduction of the cross section of the
drainage channels formed between the spacers, the clearances
that are provided allow the draining liquid to be conveyed in
the area of an adjacent drainage channel. The term liquids is
understood to include substances with flowable, pasty or
dispersive consistencies.
In addition, the formation of the spacers as deposit welds
produces a strong connection between the spacers and the body of
the cage bar, so that the spacers cannot fall off or slip. Due
to the increasing thickness of the spacers in the direction
extending from the hard layer towards the underside of the cage
bar, an angle of inclination of the spacers is produced that
allows a plurality of spacers to be positioned with precise
fitting along the inner contour of a press drum.
It is conducive to favorable flow behavior for the spacer
to have top clearance from the hard layer.
Providing the end of the spacer that faces the hard layer
with a rounded contour also contributes to low flow resistance.
Further optimization of the flow behavior can be obtained
by providing the end of the spacer that faces away from the hard
layer with a rounded contour.
An especially advantageous type of shaping consists in
contouring the spacer essentially as an elongated oval.
Optimum mutual support of the cage bars can be achieved by
grinding the surface of the spacer that faces away from the
lateral face.
Adaptation to the usual directions of flow can be achieved
if the longitudinal axis of the spacer extends essentially
transversely to the longitudinal axis of the lateral face.
To ensure optimum support of the spacers, it is proposed
that at least two spacers be arranged spaced apart on the
lateral face.
A high-strength design is produced if the spacer is made of
a material that contains chromium carbide.
Specific embodiments of the invention are illustrated
schematically in the drawings.
BRIEF DESCRIPTION OF THE ACC0MPANYIN6 DRAWINGS
— Figure 1 shows a partially interrupted side view of a
framework for the cage bars.
— Figure 2 shows a schematic view of a drum half of a
pressing device with the cage bars inserted.
— Figure 3 shows a scaled-down view from viewing
direction III in Figure 2.
— Figure 4 shows an enlarged perspective view of a cage
bar with spacers.
— Figure 5 shows two cage bars according to Figure 4
arranged side by side.
— Figure 6 shows a modified view of another cage bar.
— Figure 7 shows two cage bars according to Figure 6
arranged side by side.
DETAIL DESCRIPTION OF THE INVENTION
Figure 1 shows a partially interrupted view of a framework
(1) for cage bars of a pressing device (2) for expressing liquid
substances from feed materials. The substances are conveyed along
the longitudinal axis (3) of the drum from a material inlet (4)
towards a dry substance outlet (5>.
Figure 2 shows a cross section through a drum half (6) of
the pressing device (2). The drawing reveals that a plurality
of cage bars (8) are arranged along a radial circumference of
the drum interior (7).
The view in Figure 3 shows that the longitudinal axes (9)
of the cage bars (8) extend essentially parallel to the
longitudinal axis (3) of the drum. Both Figure 2 and Figure 3
show that the cage bars (8) are very closely arranged relative
to one another.
The design of the cage bars (8) is further illustrated by
the enlarged view in Figure 4. The drawing shows that each cage
bar (8) consists of a body (10) and a wear surface (11). The
wear surface (11) is bounded by a pressing edge (12). As Figure
5 shows, the wear surfaces (11) of adjacent cage bars (8) are
inclined relative to each other in such a way that, in the
direction of rotation (13), the pressing edge (12) of a
following cage bar (8) projects above the wear surface (11) of
the preceding cage bar (8). As a result, the interior (7) of
the drum is bounded by a finely stepped surface. In particular,
it is intended that the pressing edges (12) should be very
sharp-edged.
In the illustrated embodiment, the pressing edge (12) is
arranged in the area of a hard layer (14), which is welded onto
the body (10) of the cage bar. In principle, however, it is
possible to arrange the pressing edge (12) directly on a body
(10) made of a hardened material.
Figure 5 likewise illustrates that the cage bars (8) are
supported relative to each other by spacers (15) and that a
space (16) extends between each two adjacent cage bars (8),
through which expressed liquid can emerge from the interior (7)
of the drum. To assist the drainage of the expressed liquid, it
is intended especially that the space (16) should be designed to
widen in the direction from the pressing edge (12) towards the
undersides (17) of the cage bars (8).
Figure 4 shows that several spacers (15) are arranged
spaced apart one after another in the direction of the
longitudinal axis (9) of the bar. The spaces (16) are thus
divided into space segments (18), which help the expressed
liquid to drain off.
Figure 4 illustrates a design of the spacers (5) in which
the spacers (15) do not extend over the entire height of the
body (10) of the cage bar. The partial extent over the height
of the cage bars (8) that is illustrated in Figure 4, with
clearance from both the wear surface (11) and the underside (17)
of the cage bar, results in especially effective drainage of the
expressed liquid, since in the event of complete or partial
clogging of individual space segments (18), liquid can overflow
into adjacent space segments. Therefore, a local obstruction
does not cause a significant increase in the total effective
flow resistance.
The spacers (15) can be mounted on the body (10) of the
cage bar by various methods. For example, the spacer (15) can
be applied by deposit welding on the body (10) of the cage bar.
In particular, using the hard material of the cage bars (8) from
the area of the wear surface (11) or the hard layer (14) as the
material for the spacers (15) contributes to a high degree of
stability.
Figure 4 also illustrates that a certain amount of top
clearance (19) is provided between the spacers and the hard
layer (14) and that a certain amount of bottom clearance (20) is
provided between the spacers (15) and the underside (17) of the
cage bar. The top clearance (19) ensures that even in the event
of use-related wear of the hard layer (14), a sufficient
distance from the wear surface (11) remains.
Perpendicular to the lateral face (21) of the cage bar (8),
the spacers (15) have a thickness (22) that is smaller in the
area of the ends of the spacers (15) that face the hard layer
(14) than in the area of the ends of the spacers (15) that face
the underside (17) of the cage bar. This allows the oblique
mutual support of the cage bars (8) that is illustrated in
Figure 5.
In particular, it is intended that the spacers (15) be
deposit-welded on the lateral faces (21) with an initially
essentially constant thickness, and that the inclination then be
produced by grinding according to the specific application
geometry. This allows inexpensive production of a large number
of standardized cage bars (8). The final geometry is then
produced according to the specific application requirements
shortly before delivery with comparatively little production
expense. This helps achieve low production costs, small
inventories, and short delivery times.
The modified drawing in Figure 6 again illustrates the
thickness (22) of the spacers (15) and now further illustrates a
spacer separation (23), by which the spatial dimensioning of the
space segments (18) is determined. Between the spacers (15),
the space segments (18) have cross-sectional areas (24) that
increase from the hard layer (14) towards the underside (17) of
the cage bar.
A cross-sectional area of the cage bar (8) has an
essentially rectangular shape and deviates from this rectangular
shape only in the area of the inclination at the wear surface
(11). In a slightly modified drawing, Figure 7 is essentially
the same as Figure 5.
WE CLAIM:
i. A press cage bar for a device for expressing liquids,
which is bounded by at least one pressing edge in the area of a
wear surface of a hard layer and which* in the area of at least
one lateral face of the body of the cage bar, has at least one
spacer that is raised above the lateral face, wherein the spacer
(15 is formed as a deposit weld on the lateral face (21) of the
cage bar (8); that the spacer (15) is provided with a certain
bottom clearance (20) from the underside (17) of the cage bar
(8), which is on the opposite side of the cage bar from the wear
surface (11); that the spacer (15) extends along the lateral face
(21) no farther than to the hard layer (14); that the extent of
the spacer (15) transversely to a longitudinal axis (9) of the
lateral face (21) is greater than its extent in the direction of
the longitudinal axis (9) of the lateral face (21); and that the
spacer (15) has increasing thickness (22) perpendicular to the
lateral face (21) in a direction extending from the hard layer
(14) towards the underside (17) of the cage bar (8), wherein the
surface of the spacer (13) that faces away from the lateral face
(21) is ground, wherein a cross sectional surface of the cage bar
is contoured so that the spacing region between neighbouring cage
bars extends from the hard layer in the direction of the
underside.
2. The press cage bar as claimed in claim 1* wherein the
spacer (15) has a certain amount of top clearance (19) from the
hard layer (14).
3. The press cage bar as claimed in claim 1* wherein the
end of the spacer (15) that faces the hard layer (14) has a
rounded contour.
4. The press cage bar as claimed in claim 1, wherein the
end of the spacer (15) that faces away from the hard layer (14)
has a rounded contour.
5. The press cage bar as claimed in claim 1, wherein the
spacer (15) has an essentially elongated oval shape.
6. The press cage bar as claimed in claim 1, wherein the
longitudinal axis of the spacer (15) extends essentially
transversely to the longitudinal axis of the lateral face (21).
7. The press cage bar as claimed in claim 1, wherein at
least two spacers are arranged on the lateral face (21) with a
separation (23) between them.
8. The press cage bar as claimed in claim 1, wherein the
spacer (15) is made of a material that contains chromium carbide.
9. A device for expressing liquids, which has at least one
press cage bar,('which is bounded by at least one pressing edge in
the area of a wear surface and which, in the area of at least one
lateral face of the body of the cage bar, has a least one spacer
that is raised above the lateral face* wherein the spacer (15) is
formed as a deposit weld on the lateral face (21) of the cage bar
(8); that the spacer (15) is provided with a certain bottom
clearance (20) from the underside (17) of the cage bar (8)* which
is on the opposite side of the cage bar from the wear surface
(11); that the spacer (15) extends along the lateral face (21) no
farther than to the hard layer (14)5 that the extent of the
spacer (15) transversely to a longitudinal axis (9) of the
lateral face (21) is greater than its extent in the direction of
the longitudinal axis (9) of the lateral face (21)? and that the
spacer (15) has increasing thickness (22) perpendicular to the
lateral face (21) in a direction extending from the hard layer
(14) towards the underside (17) of the cage bar (8), wherein the
surface of the spacer (15) that faces away from the lateral face
(21) is ground, wherein a cross sectional surface of the cage bar
is contoured so that the spacing region between neighbouring cage
bars extends from the hard layer in the direction of the
underside.
10. The device as claimed in claim 9» wherein the spacer
(15) has a certain amount of top clearance (19) from the hard
layer.
11. The device as claimed in claim 9, wherein the end of
the spacer (15) that faces the hard layer (14) has a rounded
contour.
12. The device as claimed in claim 9, wherein the end of
the spacer (15) that faces away from the hard layer (14) has a
rounded contour.
13. The device as claimed in claim 9, wherein the spacer
(15) has an essentially elongated oval shape.
14. The device as claimed in claim 9, wherein the
longitudinal axis of the spacer (15) extends essentially
transversely to the longitudinal axis of the lateral face (21).
15. The device as claimed in claim 9, wherein at least two
spacers are arranged on the lateral face (21) with a separation
(23) between them.
16. The device as claimed in claim 9, wherein the spacer
(15) is made of a material that contains chromium carbide.

The invention relates to a press cage bar for a device for
expressing liquids, which is bounded by at least one pressing
edge in the area of a wear surface of a hard layer and which, in
the area of at least one lateral face of the body of the cage
bar, has at least one spacer that is raised above the lateral
face. The spacer is formed as a deposit weld on the lateral face
of the cage bar and is provided with certain bottom clearance
from the underside of the cage bar, which is on the opposite side
of the cage bar from the wear surface. Yhe space extends along
the lateral face no farther than to the hard layer. The extent of
the spacer transversely to a longitudinal axis of the lateral
face is greater than its extent in the direction of the
longitudinal axis of the lateral face. The spacer has increasing
thickness perpendicular to the lateral face in a direction
extending from the hard layer towards the underside of the cage
bar.

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Patent Number

242861

Indian Patent Application Number

4/KOLNP/2006

PG Journal Number

38/2010

Publication Date

17-Sep-2010

Grant Date

16-Sep-2010

Date of Filing

02-Jan-2006

Name of Patentee

THYSSENKRUPP ELASTOMERTECHNIK GMBH

Applicant Address

SEEVESTRASSE 1, 21079 HAMBURG

Inventors:

#	Inventor's Name	Inventor's Address
1	VORREAU, LOTHAR	FOSSHOLT 3 21079 HAMBAURG
2	VOSS, GUNTER	MUHLENSTRASSE 10 21357 BARDOWICK

PCT International Classification Number

B30B 9/26

PCT International Application Number

PCT/DE2004/001224

PCT International Filing date

2004-06-14

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	10329952.1	2003-07-03	Germany