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Publication of GB534486ApublicationCriticalpatent/GB534486A/en
Structures Of Non-Positive Displacement Pumps
(AREA)
Abstract
534,486. Synthetic resin articles. DURR, F. Sept. 1, 1939, No. 25140. Convention date, May 2. [Class 2 (iii)] [Also in Group XXVI] The impeller blades 2 of a vacuum cleaner fan are connected by two conical discs 3, 4, of which 3 is equal to or smaller than the usual inlet opening in 4. The discs are made of artificial resin or similar material which hardens by pressure in moulds.
FOERFARANDE FOER FRAMSTAELLNING AV FORMKROPPAR GENOM PRESSNING AV FIBERARTAT MATERIAL UNDER SAMTIDIG LIMNING OCH FORMKROPPAR FRAMSTAELLDA MED DETTA FOERFARANDE