Tobacco – Tobacco users' appliance – Device used for smoking
Reexamination Certificate
1999-12-07
2001-11-20
Silverman, Stanley S. (Department: 1731)
Tobacco
Tobacco users' appliance
Device used for smoking
C131S200000, C131S201000, C131S330000, C131S173000, C131S335000
Reexamination Certificate
active
06318376
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a filter tip structure, and more particularly to a filter tip structure for a cigarette.
2. Description of the Related Art
A conventional cigarette filter tip comprises a filter tip base made of active carbon, a filter, and a cigarette pipe fitted with each other. The cigarette pipe has a two-layer cigarette support compartment of an inner cone, and a plurality of radiating arranged holes. The filter includes a collecting surface with a roughness, and an annular oil collecting groove located under the collecting surface. However, the conventional cigarette filter tip composed of a filter tip base made of active carbon, a filter, and a cigarette pipe includes multiple components, thereby greatly increasing the cost of manufacture. In addition, the conventional cigarette filter tip having a complex structure is not easily assembled and dismantled. Further, the two-layer cigarette support compartment in the cigarette pipe has a plane shape so that the cigarette cannot be rigidly and stably received in the two-layer cigarette support compartment. The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional cigarette filter tip.
BRIEF SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a cigarette filter tip structure comprising a cigarette holder having a compartment defined therein and having a bottom formed with a shoulder, the compartment having a center defining a compression hole, four L-shaped support bases each mounted in an inner wall of the compartment, and each having a bottom formed with a transversely extending positioning portion; and a filter base mounted on the bottom of the cigarette holder and having a top defining a filter recess for receiving the shoulder of the cigarette holder, and a bottom defining a passage and formed with a mouth suction portion, a plurality of filter pieces each mounted in the filter base and each located adjacent to the bottom of the filter recess, a plurality of filter spaces each defined between two adjacent filter pieces and each connecting to the passage, an oil collecting needle mounted in a center of the filter pieces and located under the compression hole, a protruding ring mounted in the filter base and located between the filter recess and the passage, the protruding ring defining a through hole connecting between the filter spaces and the passage.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 3650278 (1972-03-01), Cook
patent: 3695274 (1972-10-01), Summers
patent: 4009724 (1977-03-01), Prohroff
patent: 4158364 (1979-06-01), Ligeti
patent: 4273142 (1981-06-01), Swanson et al.
patent: 4275745 (1981-06-01), Carosone
patent: 4466448 (1984-08-01), Aikman
patent: 4711254 (1987-12-01), Fleisher et al.
patent: 5472001 (1995-12-01), Nicholson
patent: 5540241 (1996-07-01), Kim
patent: 6006757 (1999-12-01), Lichtenberg
Lopez Carlos
Rosenberg , Klein & Lee
Silverman Stanley S.
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