| 摘要 |
931,928. Pug mills. R. KESTERMANN, and A. KESTERMANN, [trading as GERHARD KESTERMANN ZAHNRADERUND MASCHINENFABRIK KOMM.-GES.]. Dec. 5, 1961 [Dec. 6, 1960], No. 43476/61. Class 86. [Also in Group V] A screw press for thermoplastic materials comprises two or more screws L, R, in mesh with one another, on each of which at least one additional screw thread 3 is developed with a diameter increasing in the direction of flow of the plastic up to the outer diameter of the screws. The press may have an entry portion AB and a discharge portion EF separated by the treatment portion CD in which the thread 3 expands to its final size.
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