Improved process of producing cellulose articles from waste tanbark or waste bark ofconiferae and foliage trees

摘要

289,676. Zarfel, C., and Stroever, W. D. July 14, 1927. Joint-making packing.-In the production of a material suitable for use as a packing for stuffing boxes &c., waste tan-bark or the bark of coniferal and foliage trees is boiled for 2-3 hours in a closed vessel containing soda lye of 3-4 per cent, and the boiled mass is freed from the lye, rinsed with cold water, ground and finally formed into solid bodies. Pulp fibres may be added to the initial material for reducing the hardness of the finished product. Specifications 8493/86, [Class 96, Paper &c.], 12159/86, 7058/89, 20613/99, 12324/12, and 261,959, [all in Class 70, Indiarubber &c.], are referred to.