Device for wrapping groups of filter segments with a wrapping material for producing multi-segment filters of the tobacco industry and multi-segment filter production device

Abstract

Device for wrapping groups of filter segments with a wrapping material. The device includes a rolling channel defined between adjacent stretches of at least one first roller conveyor and at least one second roller conveyor. The rolling channel is structured and arranged to wrap the groups of filter segments with the wrapping material by rolling each of the groups of filter segments. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Description

[0001] The present application is a National Stage Application of International Application No. PCT / EP02 / 10290, filed Sep. 13, 2002, which published as WO 03 / 037113 on May 8, 2003. Further, the present application claims priority under 35 U.S.C. .sctn. 119 of German Patent Application No. 101 53 655.0 filed on Nov. 2, 2001.[0002] 1. Field of the Invention[0003] The invention relates to a device for wrapping groups of filter segments with a wrapping material for producing multi-segment filters of the tobacco processing industry. The invention further relates to a multi-segment filter production device.[0004] 2. Discussion of Background Information[0005] Devices for wrapping groups of filter segments with a wrapping material for producing multi-segment filters of the tobacco processing industry are known per se. Reference is hereby made, e.g., to a filter rod machine of the applicant called KDF. By means of this rod-making device that is known, e.g., from DE-0S 2452 749, which corresp...

AI Technical Summary

Benefits of technology

[0013] The invention therefore makes it possible for the first time to wrap groups of filter segments in a crosswise axial process by way of rolling using corresponding roller conveyors. The device according to the invention has the advantage that a particularly gentle and space-saving wrapping of groups of filter segments for producing multi-segment filters is rendered possible. It is thus possible to provide a gentle wrapping by providing usually elastic belts, whereby in particular even slight differences in diameter of the filter segments are compensated for. In order to provide a particularly effective equalization of the differences in diameter, a pair of roller conveyors is provided for each segment. Because only groups of filter segments are wrapped, it is possible to provide a relatively narrow roller conveyor so that in a preferred embodiment of the invention a single first roller conveyor and a single second roller conveyor is provided. This simplifies the device according to the invention considerably, in particular regarding the control of the device.

[0032] The conveyor device is preferably horizontal. If mechanisms are provided for fixing filter segments in seat grooves that are arranged on the conveyor belt or the conveyor belts, a very reliable transport of the filter segments is possible.

Problems solved by technology

A large financial expenditure is associated with this as well as a low variability in the production of multi-filters.

The multi-segment filters produced in this way have the disadvantage that their diameter varies.

Furthermore, the process for producing or uniting the groups of filter segments is disadvantageous because at least one fixed rolling surface is provided which, at the moment of arrival of the group to be rolled, exerts a considerable force on this group without giving way.

Due to the rigidity of the rolling surfaces, damage to the groups to be wrapped by rolling can occur.

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