Tobacco – Cigar or cigarette making – Tobacco feeding
Patent
1974-07-30
1976-10-12
Michell, Robert W.
Tobacco
Cigar or cigarette making
Tobacco feeding
131140R, A24B 304
Patent
active
039851451
ABSTRACT:
Moist tobacco is conveyed through a rotating drum which is heated by steam circulating coils and wherein a current of hot air is caused to flow counter to the direction of tobacco transport. The moisture content of conditioned tobacco is monitored by a detector which produces a first signal when the monitored moisture content deviates from a desired moisture content. The first signal is used to rapidly change the temperature of the air current from a standard temperature by adjusting the position of a valve which mixes hot air with cooler air whereby the extent of adjustment corresponds to the extent of deviation of monitored moisture content from desired moisture content. A second signal whose intensity is indicative of the extent of valve adjustment is transmitted to the input of a proportional-plus-integral amplifier which immediately changes the steam pressure in the coils and additionally changes the steam pressure while the temperature of the hot air current deviates from the standard temperature. The valve is reset to a position corresponding to the standard temperature of the air current whereupon the deviation of monitored moisture content from desired moisture content is counteracted exclusively by the changed temperature of the drum and coils as a result of adjustment of steam pressure in the coils.
REFERENCES:
patent: 2606372 (1952-08-01), Foulder et al.
patent: 2763069 (1956-09-01), Vaughan
patent: 3372488 (1968-03-01), Koch et al.
patent: 3389707 (1968-06-01), Wochnowski
patent: 3409025 (1968-11-01), Wochnowski
patent: 3578299 (1971-05-01), Hurlbut
patent: 3760816 (1973-09-01), Wochnowski
patent: 3795984 (1974-03-01), Meyer
patent: 3840025 (1974-10-01), Fowler et al.
Broscheit Wolfgang
Schwarz Peter
Wochnowski Waldemar
Hauni-Werke Korber & Co. KG
Kontler Peter K.
Kurucz John
Michell Robert W.
Millin V.
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