FILTER BAG FOR PRODUCTION OF BEVERAGE EXTRACT BY DROP METHOD (VERSIONS) Russian patent published in 2025 - IPC A47J31/06 

FIELD: beverage preparation devices.

SUBSTANCE: group of inventions relates to production of beverage extracts by drop method. Proposed device comprises casing made of water-permeable filtering cloth and thin plate elements arranged on two opposite outer surfaces of bag body. On each of said two opposite outer surfaces of the bag body, the thin plate element comprises an upper connection part attached to the bag body along its upper side, a central part attached to the bag body from its lower side relative to said upper connection part, and a hook made continuous with the central part and located with possibility of pulling from the bag body. Upper part of the connection has an inclined fold line obliquely crossing the middle line along the width of the upper part of the connection.

EFFECT: eliminated is rupture of upper parts of the connection when the device is hooked on the cup; the area of the opening of the bag body is increased; easy opening of the body is provided when the extractable substance is sealed in such a filter bag.

10 cl, 32 dwg