Claims
- 1. A process for treating a continuous, multifilament filter tow in connection with the manufacture of filter elements therefrom which comprises
- (a) introducing said filter tow and a stream of gaseous fluid into a blooming jet device that includes an elongated filter tow passageway substantially circular in cross-sectional shape and provided with orifice means transversely positioned in said passageway, said orifice means being designed to accommodate passage therethrough of the filter tow and the gaseous fluid moving in co-current fashion,
- (b) applying an additive to the filter tow by primary nozzle means concentrically positioned with respect to the advancing filter tow in said passageway at a point that is downstream of said orifice means,
- (c) withdrawing the additive-treated filter tow from the blooming jet device by delivery roll means, and
- (d) advancing the additive-treated filter tow from said delivery roll means through a stuffer jet and into a condensing horn associated with filter rod-forming means.
- 2. The process of claim 1, wherein the additive is applied to the filter tow in the form of an aerated atomized spray.
- 3. The process of claims 1 or 2 wherein additional additive is applied to the filter tow by introducing said additional additive into the stream of gaseous fluid at a point upstream of said orifice means.
- 4. The process of claims 1 or 2 wherein additional additive is applied to the filter tow by secondary nozzle means positioned adjacent to the wall surface of the elongated filter tow passageway at a point that is downstream of said orifice means.
- 5. A process for treating a continuous, multifilament filter tow in connection with the manufacture of filter elements therefrom which comprises
- (a) introducing said filter tow and a stream of gaseous fluid into a blooming jet device that includes an elongated filter tow passageway substantially circular in cross-sectional shape, said jet device being designed to subject the filter tow to tension as the filter tow and gaseous fluid move in co-current fashion through said passageway,
- (b) applying an additive to the filter tow as it moves through the elongated filter tow passageway of the blooming jet device,
- (c) withdrawing the additive-treated filter tow from the blooming jet device by transport means adapted to engage the filter tow without compressing or flattening the filter tow between directly opposed tow-contacting surfaces, and
- (d) advancing the additive-treated filter tow into the condensing horn associated with filter rod-forming means.
- 6. The process of claim 5 wherein the additive is applied to the filter tow by primary nozzle means concentrically positioned with respect to the advancing filter tow in said elongated filter tow passageway.
- 7. The process of claim 5 wherein the filter tow and the stream of gaseous fluid are directed through orifice means transversely positioned in said elongated filter tow passageway.
- 8. The process of claim 7 wherein the additive is applied to the filter tow by secondary nozzle means positioned adjacent to the wall surface of the elongated filter tow passageway at a point that is downstream of said orifice means.
- 9. The process of claim 7 wherein the additive is applied to the filter tow by introducing the additive into the stream of gaseous fluid at a point upstream of said orifice means.
- 10. The process of claims 6 or 8 wherein the additive includes a flavoring agent and said additive is applied in the form of an aerated atomized spray.
- 11. A process for applying an additive to a continuous, multifilament filter tow in connection with the manufacture of filter elements therefrom which comprises passing the filter tow through a jet device that includes
- (a) a jet tube having entry and exit ends with an elongated passageway substantially circular in cross-sectional shape extending through the tube, said entry and exit ends being adapted to receive and discharge, respectively, said filter tow,
- (b) means for establishing and maintaining a high velocity stream of gaseous fluid through the jet device in the direction of said exit end of the jet tube,
- (c) orifice means transversely positioned in the elongated passageway and designed to accommodate passage therethrough of the gaseous fluid and advancing filter tow,
- (d) discharge means disposed at the exit end of the jet tube and designed to permit a sudden radially outward movement of the gaseous fluid and filter tow as they emerge from the exit end of the jet tube, and
- (e) tow confining means associated with said discharge means for limiting the radially outward movement of the filter tow,
- subjecting the filter tow while moving through said jet device to tension created by a high velocity stream of gaseous fluid moving through the jet device in co-current flow with the filter tow, applying an additive to the filter tow by nozzle means located in the jet tube downstream of said orifice means and concentrically positioned with respect to the advancing filter tow, and withdrawing treated filter tow from said jet device for further processing into filter elements.
- 12. The process of claim 11 wherein the additive is applied to the filter tow at a point intermediate said orifice means and said discharge means.
- 13. The process of claims 11 or 12 wherein the additive includes a flavoring agent and said additive is applied to the filter tow in the form of an aerated atomized spray.
Parent Case Info
This is a divisional of co-pending application Ser. No. 468,011 filed on Feb. 18, 1983 and now U.S. Pat. No. 4,476,807.
US Referenced Citations (17)
Divisions (1)
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Number |
Date |
Country |
Parent |
468011 |
Feb 1983 |
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