Abstract: A filter-paper insert, for producing aroma extracts from ground coffee, in the form of a frustoconical filter, a conical filter, a pyramidal filter, a basket filter or the like. The permeability of the filter paper from which the filter-paper insert (10) is produced is increased through perforations, imprinting or imprinted perforations (11), or a combination of these measures.

Abstract: The subject matter of the invention is an embossing press, including an embossing roller and a counter cylinder, for producing embossed seams by joining at least two paper layers or fleece layers, arranged one above the other and conveyed in a straight line. For this, the embossed seams extend at a slant or at a right angle relative to the conveying direction of the paper layers or fleece layers. The embossing roller is provided with at least two rows of embossing teeth, arranged at a distance to each other, and the counter cylinder is designed as fluted roller, at least in the area effective for the embossing operation.

Abstract: A method for producing filter paper, in particular filter paper for preparing brewed beverages such as coffee or tea employs the steps of producing initially a noncrimped paper of high strength and subsequently rendering this paper capable of filtering through perforation and/or stamping or stamped perforation. The above method is advantageous in that a high production speed of the paper-manufacturing machine results since a crimping device (crimping cylinder, crimping scraper) is no longer required. Accordingly, the bottleneck caused by the crimping device speed is eliminated.

Abstract: A bag-shaped filter insert made of filter paper for preparing aromatic extracts of coffee or tea includes an upper region and an adjoining bottom region. The bottom region has a lesser permeability than the upper region.

Abstract: A filter-paper insert (1) for preparing filtered coffee wherein, to alter the flavor of filtered coffee, the filter-paper insert (1) is provided with a coating (3) comprising a flavoring agent that forms a flavoring carrier, as well as a carrier material and a solvent. A coating (3) of this type can be sprayed or imprinted onto the filter-paper of the filter-paper insert (1), or otherwise applied to it, and dries relatively quickly following the application. Despite this, the flavoring agents are incorporated into the coating (3), and are reactivated when the hot brewing water flows through the filter-paper insert (1) for preparing filtered coffee.

Abstract: A generally funnel shaped paper filter for use in a filter device for preparing coffee or tea extracts. The paper filter has a flattened, folded state and an open, unfolded state for use and includes two facing panels joined at lateral sides thereof to define opposite lateral paper filter edges and joined at bottom sides thereof to define a paper filter bottom; an upper edge forming part of each panel and defining a paper filter opening; and an embossed line provided in each panel for stabilizing the paper filter in its open state.

Abstract: The subject matter of the invention is an embossing press, including an embossing roller and a counter cylinder, for producing embossed seams by joining at least two paper layers or fleece layers, arranged one above the other and conveyed in a straight line. For this, the embossed seams extend at a slant or at a right angle relative to the conveying direction of the paper layers or fleece layers.