Filter sleeve for a drain element for presses to remove liquids

Details Filter sleeve for a drain element for presses to remove liquids Filter sleeve for a drain element for presses to remove liquids

1996-01-19

1998-03-31

Savage, Matthew O.

Presses

With drain means for expressed liquid

Drain tube inbedded in material

100125, 210232, 210450, 210461, 210462, 210463, 210486, 210495, 210499, B30B 906

Patent

active

057326215

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a filter sleeve for a drain element for presses to remove liquids from solids, in particular for fruit presses, wherein the drain element comprises a rod-shaped, flexible drain core with flow paths for removing the pressed-out liquid from the pressing chamber of the press and a liquid-permeable filter sleeve enclosing the drain core, wherein at least one end of the drain element is fastened on a juice collecting plate, pressure plate or on the pressing surface of the press.


BACKGROUND

FIG. 1 shows a longitudinal section through the known fastening of a drain element in a fruit press. A plurality of drain elements 3 are disposed in a pressing chamber 2, bordered by respectively one pressure plate 1, of a known fruit press, not shown.
A drain element 3 essentially consists of an elastic drain core 4, through whose grooves 5, located on its exterior, the liquid is taken out of the pressing chamber 2 during the pressing process, as shown by the section A--A, and of a sock-shaped filter 6 for the separation of liquids from solids stretched over it. The drain core 4 and the filter 6 are respectively fastened on a core holder 7 at the ends of the drain element. In this case the filter is brought over an elastic cuff 8 and is fixed in place by means of an O-ring 9. A disk 10 is used to support the cuff 8 against a transverse pin 11, which is pushed laterally into bores of the drain core 4 and the core holder 7 and in this way assures the axial and radial fixation of the two components 4 and 7 in respect to each other.
The core holder 7 is connected with the pressure plate 1 by means of a spacer bushing 12 and a securing ring 13. In the process a cam 14 of the securing ring 13, which engages a groove of the core holder 7 through a slit in the spacer bushing 12, together with a collar 17 of the spacer bushing 12 located behind the pressure plate 1, provides the security against axial displacement.
As can be seen in FIG. 1, the filter 6 is held in the spacer bushing 12 by being clamped between the core holder 7, the cuff 8 and the O-ring 9. At least the cuff 8 is made of an elastically deformable material, preferably of an elastomer. In this known embodiment, the drain filters 6 are produced by means of a knitting process and, to prevent runs, are closed by sewing or cut by heat at the ends close to the disk 10, so that the stitches are slightly melted to each other.
This type of construction has the following disadvantages:
The assembly of the filter element 6 with the complete drain element 3 is highly labor-intensive. The filter 6 is drawn over the cuff 8 and must be correctly placed in the longitudinal direction. Then the O-ring 9 is pushed over it and must be clamped, together with the drain core 4, in the core holder 7. As a rule, the following assembly errors occur in the course of this: --formation of runs because of too strong a pull--wrong placement in the longitudinal direction--the O-ring is displaced during the insertion--use of lubricants, although this is not permissible. These errors can result in an inadequate fastening of the filter 6 on the connecting element. As a consequence, the filter 6 is pulled out from under the O-ring 9 during the operation and the working of the press is hampered.
A problem also occurs during the disassembly of a filter 6 which is worn in the course of normal operation, because the O-ring 9 in some cases is seated very firmly and in this way makes disassembly more difficult.


SUMMARY OF THE INVENTION

It is the object of the invention to prevent the recited disadvantages by means of a filter sleeve of the type mentioned at the outset.
This object is attained in accordance with the invention by at least one ring-like bead which is deformable in a rubber- elastic manner and is firmly fixed on the filter sleeve on at least one end.
In the process it has been shown to be particularly advantageous if for fastening with the drain element on the press, the ring-like bead permits the push of the respective end of the filter sleeve through an opening wh

REFERENCES:
patent: 4601735 (1986-07-01), Morton, Jr.
patent: 5130022 (1992-07-01), Chara

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