US PATENT SUBCLASS 493 / 39
CIGARETTE FILTER MAKING

Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

39CIGARETTE FILTER MAKING {5}
40  DF  .~> Filter having indicator or inspection means
41  DF  .~> With application of heat to secure wrapper
42  DF  .~> With shaping or compacting of filter material {4}
47  DF  .~> By assembling dissimilar filter materials (e.g., fiber and powdered charcoal, etc.) {2}
50  DF  .~> Filter of fibrous material

DEFINITION

Classification: 493/39

CIGARETTE FILTER MAKING:

(under the class definition) Method or apparatus including an article constructed to be secured to or integrated with the end of a tubular or rodlike tobacco or tobaccolike product, which article is intended to restrict, entrap, or alter components, of the flow of gases and combustion products from the tubular or rodlike tobacco or tobaccolike product when burning to thereby modify the composition or condition of such gases and combustion products passing therethrough.

(1) Note. The article to restrict, entrap, or alter flow of gases and combustion products shall herein after be referred to as a "filter".

(2) Note. This class is the residual home for making a cigarette filter, even if the filter is not constructed of sheet or web material. Therefore, a patent directed to the making of such a cigarette filter will be found herein unless provided for elsewhere.

(3) Note. A cigarette is any rodlike article of tobacco or tobaccolike material intended to be manually manipulated directly to the mouth of the user.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4, for making a cigarette filter including use of a control means energized in response to an activator stimulated by a condition sensor.

374+, for assembling a filter, generally. SEE OR SEARCH CLASS

29, Metal Working, for manufacture of a detachable cigarette filter, e.g., a water bottle-type tobacco smoke filter, a hookah, a cigarette holder having a filter, etc.

131, Tobacco,

280+, for means for making a cigarette filter combined with means for recognizing (or engaging) a tobacco product.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for a method of forming material to be used as the filler material of a cigarette filter.

425, Plastic Article or Earthenware Shaping or Treating: Apparatus, for apparatus for forming material to be used as the filler material of a cigarette filter.