01.08.2012 Change from HEIN, LEHMANN Trenn- und Fördertechnik GmbH in HEIN, LEHMANN GmbH
2009 DELTA II screening machine, 2. generation control established
2009 mobile screening unit LIWELL® motion 751
2002 DELTA II screening machine for high capacities with difficult to screen material
1996 LIWELL® Flip-Flow screening machine Type KT with an overlaid circular vibration
1994 Move of production facilities and administration premises to Krefeld
19.12.1988 Foundation of HEIN, LEHMANN Trenn- und Fördertechnik GmbH including the departments of Herrmann-Screens® and mass separation
1984 WS 85®, screen exchange system for PUR-screen mats
1984 Manufacturing of welded wedge wire screen baskets for paper sorting industry
1983 WS 83, screen exchange system for steel screens made of PUR-adapter ledges
1977 VENO-Flex®, SERPA-Flex®, HARPA-Flex®-Harps
1975 LEMANIT® tensioning screens made of polyurethane
1975 Start with production of CORIMA wedge wire screens
1974 LIWELL® Flip-Flow screening machine Type LF
1973 Structure of the manufacturing plant in Zingsheim
1971 LIWELL® Flip-Flow screening machine Type LS
1967 TORWELL Flip-Flow screening machine
1964 UMBREX screening machine with flexible screen panels made of rubber
1962 UMBRA screening machine with screen panels with jerked meshes
1958 Umbra screens with the screen panels made of guide bars, for the extensive bulking of sticky and moist broken material with maximum performance.
1956 KONTI, the fully-continuous stream centrifugal for the sugar industry
1955 Self-cleaning condenser system for power stations
1955 ATOSKOP screening machine
1954-1961 Pulsating deduster
1952 Zone inclined bunker for post-dewatering
1950 The mass separation department is established. In the beginning it developed and built radial screening systems, preliminary, post and ground dewatering systems for the mining industry, chamber sluices and chamber buckets for dewatering works, sifter systems, twin-pipe showers, material collectors for the paper industry and high-capacity pulp collectors.
1948 The department Herrmann-screens® moves its premises to halls located in Fichtenstrasse in Duesseldorf. Here begins the production of VIBRO® spring steel wire cloths, DS, SERPA®, VENO®-Harp Screens, Rima®, Rimetta®, Ultra Rimetta and DD wedge wire screens, DOVEX®, DOPRA and RASTEX® screen panels, screen panels and fluidized beds, UMBRA screen panels, rubber wedge wire screens, rubber hole screens, DUO screen panels with flexible screen openings, pressure jet screen panels, CONIDUR® fine hole and slotted hole sheets, metal wire belts.
1947 Acquisition of all patents and licenses of the company Louis Herrmann, founded in 1846, dismounted in Dresden and specialized in manufacturing of industrial screens and wire belts. They were traded under the world-famous brand designation Herrmann-screens®.
1946-1988 All Rhine bridges in Duesseldorf are built. The delivery program of HL AG includes further fixed and movable bridges, building construction for mining and industry, frame constructions for multi-story buildings, scaffolds for cranes and crane tracks, pithead gears, bunkers, steel water structures, radio and television masts with heights up to 322 m and pot-galvanizing. Deliveries were made to Germany, Europe, South America and Asia. Foundation of subsidiary companies and partnerships abroad.
1928 Radio tower in Berlin
1911 Completion of the Airship hall in Duesseldorf-Lohhausen
1910 Inauguration of the bridge “Hohenzollernbrücke” in Cologne, with a span of 119 m
1902+1910 Gold medal for special technical achievements in Duesseldorf and Brussels
1895 Beginning of steel and bridge constructions in Duesseldorf
1889 Premises transfer to Duesseldorf-Oberbilk
12.11.1888 Foundation of Hein, Lehmann & Co. Aktiengesellschaft
1885 Manufacturing of signal systems for the railroad authority on the basis of their own patents
1878 The tradesman Max Hein and the engineer Anton Lehmann run together a factory for corrugated iron sheets in Berlin-Reinikendorf

Wedge Wire Screens- Brochure