D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
92/43
D21D 5/00 (2006.01) D21D 1/30 (2006.01)
Patent
CA 1116453
ABSTRACT OF THE DISCLOSURE The invention relates to grinding elements of a grind- ing mill, especially for a production of special kinds of paper and cardboard, e.g. as an imitation of parchment, tracing paper, deep-drawing trunk cardboard, etc. When grinding, it is neces- sary to ensure a perfect fibrillation of fibres and an outlet homogeneity of the ground compound. The invention provides a new design of grinding elements of grinding mills made of steel, which replaces basalt-lava grinding elements and obviates dis- advantages of existing grinding elements at ensuring the desired quality of the compound. Grinding elements according to the invention consist of a fixed disc and of a rotating one. Both discs are provided in their function surfaces with a system of three types of straight grooves. The first grooves are widest and deepest and they make with a radial line against the sense of rotation an acute angle ? = 10° up to 20°, to them the second narrower and flatter grooves link up and they make with the radial line against the sense of revolution an angle .beta. = 3?. To the second grooves the third narrowest and flattest grooves link up and they make with them an angle ? = 80° up to 100°.
337881
Kmeco Rudolf
Muller Jiri
Varhanicek Jaroslav
Narodni Podnik Papcel Strojirny Pro Prdmysl Celulosy A. Papiru
Swabey Ogilvy Renault
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