Method and apparatus for determining the triacetin content...

Details Method and apparatus for determining the triacetin content... Method and apparatus for determining the triacetin content...

2006-04-11

2006-04-11

Lee, Hwa (Andrew) (Department: 2877)

Optics: measuring and testing

Miscellaneous

C356S237200, C131S084100, C131S905000, C131S906000, C324S633000

Reexamination Certificate

active

07027148

ABSTRACT:
Apparatus and method for determining the triacetin content in cigarette filter plugs during the manufacture of the filter plugs from a filter tow. The apparatus including a filter tow storage container, a filter tow stretching device, a device for feeding triacetin, to the filter tow, a plug-forming device, a device for dividing the plug into portions, a first microwave sensor disposed downstream of the plug-forming device, and a second microwave sensor disposed upstream of the feed device for the triacetin. The triacetin content is determined by transmitting a high frequency electromagnetic field through the filter plug both before and after the triacetin is added and measuring the frequency shift and spread of the electromagnetic field to determine mass signals Atand A0, respectivley. A0is compared to Atto calculate the triacetin content of the filter plug.

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E. Samios, et al., “Preparation, characterization and biodegradation studies on cellulose acetates with varying degrees of substitution”, Polymer vol. 38 No. 12, pp. 3045-3054, 1997, G.B., Elsevier Science Ltd., Publishers.

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