Method of densifying streams of filter material for tobacco smoke
AssigneeHauni Maschinenbau AG
InventorHeinz-Christen Lorenzen
Life of this patent
Estimating the term…
Abstract
A filter rod making machine wherein successive increments of a stream constituting a converted tow of filamentary filter material for tobacco smoke are contacted by a compressing tool which is vibrated at a frequency and/or amplitude sufficient to prevent over-heating of the tool and/or of filaments of filter material, such as acetate fibers. Conversion of the tow into the stream and the wrapping of the compressed stream into a running web of filter paper are carried out in a conventional manner.
Claims10
A method of processing filter material for tobacco smoke, comprising the steps of:
- advancing a stream of compressible fibrous filter material lengthwise in a predetermined direction along a predetermined path having at least one selected portion wherein successive increments of the advancing stream are at least partly accessible;
- and
- reducing the cross-sectional areas of said successive increments to form the stream in a tubular cross-sectional outline in said at least one selected portion of said path, including at least intermittently contacting said successive increments by a portion of a stream compressing implement and repeatedly vibrating the portion of the implement in both the predetermined direction and a direction perpendicular to the predetermined direction.
A method of processing filamentary material, comprising the steps of:
- advancing a stream of filamentary material lengthwise along a predetermined path;
- subjecting the advancing stream to a plurality of treatments in several portions of said path, at least one of said treatments including establishing a frictional engagement between the advancing stream and at least one stream-compressing implement, the stream-compressing implement vibrating in both the predetermined direction and a direction perpendicular to the predetermined direction;
- and
- maintaining the rise of temperature of the stream, as a result of frictional engagement with the at least one implement, below a predetermined value by imparting movement to the stream by the implement.
Dependencies are inferred from the claim text.