. Chemical development Section [and] Mechanical Research and Development Section; summary of achievements, 1917-1918. iSARLY UOUGHKUT FORM OP CRSPE PAPER FILTER. CREP3 PAPER DOUGHKUT PILTBR GAGISTER hole» so that a hoiizontal section resembles a first filters of this type were made of doughnut-shapedlayers piled wp and the pile sealed at top and bottom to thecanister so that the air had to pass through the walls paral-lel to the layers of paper., iixperlments with doughnut filtersof sulphite^eeUul«;se crepe papei were continued for several .months, study being Qade-of various pape
. Chemical development Section [and] Mechanical Research and Development Section; summary of achievements, 1917-1918. iSARLY UOUGHKUT FORM OP CRSPE PAPER FILTER. CREP3 PAPER DOUGHKUT PILTBR GAGISTER hole» so that a hoiizontal section resembles a first filters of this type were made of doughnut-shapedlayers piled wp and the pile sealed at top and bottom to thecanister so that the air had to pass through the walls paral-lel to the layers of paper., iixperlments with doughnut filtersof sulphite^eeUul«;se crepe papei were continued for several .months, study being Qade-of various papers, direction ofcrepe in layers, methads of making discs, methods of buildingfilters, etc. This line of investigation was finally dropped,as there seemed small hope of getting reliable and reproducirble results. Molded Pulp Filter. A direct successor of the crepe paperdoughnut filter was the molded pulp filter which started aboutApril 1st with a doughnut-shaped filter., cut from a block ofpulp molded by draining the water from a thin solution ofScott tissue paper, then drying in an oven. This gave suchpromise of filter qualities, together with ea^i? of
Size: 1804px × 1385px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashington, bookyea
