process for the production of a schwebstoff - filterpackung for air or gas cleaning from zigzag foermig doubly folded filter paper, and the method produced filterpackung.

摘要

1408194 Filters DELBAG-LUFTFILTER GmbH 28 July 1972 [28 July 1971] 35340/72 Heading BIT [Also in Division B5] A method of forming a filter for gases comprises forming zig-zag parallel folds in a paper web 1 applying hardenable uniform adhesive strips 2 to each side of the web while it is in an opened condition; folding to form a filter with the adhesive forming spacer strips and finally hardening the adhesive.