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公开(公告)号：DE59301127D1
公开(公告)日：1996-01-25
申请号：DE59301127
申请日：1993-02-03
Applicant: BASF MAGNETICS GMBH
Inventor： SCHWARZ LOTHAR , KUNTZ GUENTHER
Abstract: A filtering device is described, in which a multiplicity of filter elements (1) are situated in the interior of a filter housing (7), which filter elements hang from the filter lid (3), the interior bore holes of the filter cartridges being connected to the outlet connector (6) via a channel system. At the wall of the filter housing (7) there lies a film bag (2), the top end of which is fused to an O-ring (4), which is seated in an annular groove on the flange of the filter housing, the diameters of O-ring and film bag being identical. Furthermore, between the film bag (2) and interior wall of the filter housing and in the interior of the filter cartridges are provided volume displacement bodies (16, 17, 25), which extend in axial direction over the entire length of the filter housing. When changing the filter, these volume displacement bodies are for example inflated with compressed air, as a result of which the remaining filtrate volume is considerably reduced, so that less dispersion loss occurs. The arrangement described permits the filter to be changed easily and provides advantages in the disposal of residues.
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公开(公告)号：DE4204354A1
公开(公告)日：1993-08-19
申请号：DE4204354
申请日：1992-02-14
Applicant: BASF MAGNETICS GMBH
Inventor： SCHWARZ LOTHAR , KUNTZ GUENTHER
Abstract: A filtering device is described, in which a multiplicity of filter elements (1) are situated in the interior of a filter housing (7), which filter elements hang from the filter lid (3), the interior bore holes of the filter cartridges being connected to the outlet connector (6) via a channel system. At the wall of the filter housing (7) there lies a film bag (2), the top end of which is fused to an O-ring (4), which is seated in an annular groove on the flange of the filter housing, the diameters of O-ring and film bag being identical. Furthermore, between the film bag (2) and interior wall of the filter housing and in the interior of the filter cartridges are provided volume displacement bodies (16, 17, 25), which extend in axial direction over the entire length of the filter housing. When changing the filter, these volume displacement bodies are for example inflated with compressed air, as a result of which the remaining filtrate volume is considerably reduced, so that less dispersion loss occurs. The arrangement described permits the filter to be changed easily and provides advantages in the disposal of residues.
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公开(公告)号：DE19531886A1
公开(公告)日：1997-03-06
申请号：DE19531886
申请日：1995-08-30
Applicant: BASF MAGNETICS GMBH
Inventor： STEPHAN OSKAR , WEINGART FRANZ DR , BURKHARDT UWE , THIELE HEINO DR , SCHWARZ LOTHAR , MUELLER NORBERT DR , EICHER JOCHEN DR
Abstract: Large amounts of coated foils can be fed to a continuous recycling process in which the coating carrier material and any pigments present in the coating can be recovered. The treatment is carried out at room temperature in an alkaline medium comprising soft soap, organic solvents and/or water, optionally with the use of catalyst. The solvent is recirculated. After the first treatment step, the foil shreds can be treated in a second step with a solvent - water mixture, in a similar manner to the first step. A third step involves thorough final washing in a water or solvent circuit. The recovered foil shreds are dried, pressed, ground and shaped as desired in a plastics agglomerator and the recovered pigments are dried in a vacuum. The process and devices can advantageously be used for any type of coating carriers or printed carriers, for example magnetic coating carriers, printed plates or pigment-free coating carriers.
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公开(公告)号：DE4233999A1
公开(公告)日：1994-04-14
申请号：DE4233999
申请日：1992-10-09
Applicant: BASF MAGNETICS GMBH
Inventor： LATZEL WERNER DR , ENGELHARDT PETER , RUDOLF PETER DR , SCHWARZ LOTHAR , HEILMANN PETER DR , ROLLER HERMANN , LEHNER AUGUST
Abstract: Magnetic recording media with a coating on the reverse side is produced, consisting of a non-magnetic substrate, a magnetic coating on the main side, and, on the other side, a coating made up of a polymer binder, non-magnetic fillers, pigments, dispersing agents and other usual additives. The material for this reverse coating is produced by separately mixing the various solid particles and additives with part of a solution of the binder so as to coat the particles with the organic substances concerned; this mix is next dispersed by means of a ball mill, metered quantities of the dispersion obtained plus the remaining solution of binder are then intensively mixed in a toothed colloid mill against the direction of feed before being applied to the reverse side of the sheeting. ADVANTAGE - The method produces stable dispersions from a wide variety of solid materials. It does so with a high space-time output. Existing types of dispersion can be used without increasing the quantity of dispersion agent. It improves the fault count in the reverse side layer and hence improves the recording quality of the medium.
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