Filter unit for a capsule

• Main Authors: ABRAHAM, SOPHIE, WYSS, HEINZ, SUBLET, RENAUD, KOHLI, HANS-MARKUS
• Format: Patent
• Language: English
• Published: 05.11.2015
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; APPARATUS FOR MAKING BEVERAGES; COFFEE MILLS; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; DOMESTIC ARTICLES OR APPLIANCES; FOODS OR FOODSTUFFS; FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J; FURNITURE; HANDLING THIN OR FILAMENTARY MATERIAL; HUMAN NECESSITIES; KITCHEN EQUIPMENT; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL; SPICE MILLS; STORING; SUCTION CLEANERS IN GENERAL; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES; TRANSPORTING

The present invention provides a filter unit 10 for a capsule for preparing a beverage and/or nutritional product. The filter unit is designed to avoid clogging. The filter unit therefore comprises a second filter 50, which is provided upstream a first filter 40in respect to the liquid flow through the filter unit 10. The second filter 50has a pore size to hold back large particles such as scale, bio-film or iron oxide. The present invention is able to ensure a consistent liquid flow through the filter unit. The filter unit can be used with any kind of liquid source.