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Equipment for processing at least one strip of filter material in the tobacco industry

A technology of filter material and equipment, applied in the direction of tobacco, e-liquid filter, application, etc., can solve the problems of fiber damage, rupture, affecting the filtration performance of finished filter tips, etc.

Inactive Publication Date: 2008-10-08
GD SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It has been found that during these longitudinal and / or transverse pulling or stretching operations, the constituent fibers of the tow are subject to damage and rupture, which, as a result, will adversely affect the filtration performance of the finished filter.

Method used

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  • Equipment for processing at least one strip of filter material in the tobacco industry
  • Equipment for processing at least one strip of filter material in the tobacco industry
  • Equipment for processing at least one strip of filter material in the tobacco industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Referring to FIG. 1 , reference numeral 1 generally designates an apparatus used in the tobacco industry for processing filter material tows 2 , which is interposed between a feed unit 3 for supplying material tows 2 and a filter making machine or filter assembly area. Between, the filter making machine or filter assembly area is represented schematically as a box denoted by reference number 4 .

[0016] The feeding unit 3, the device 1 and the assembly area 4 constitute the interworking parts of a filter making machine which, apart from the device 1 disclosed, is of the familiar type and therefore will not be shown and described in detail.

[0017] Proceeding along the feed direction F followed by the tow 2, the apparatus 1 comprises a pair of guide rollers 5 and 6 working in combination with each other, followed along a processing path denoted by the reference P including a A device 7 through which the bundle of material 2 is stretched and drawn longitudinally and / or ...

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PUM

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Abstract

A strip (2) of material used to make filter tips is processed on equipment incorporating one or more pairs of rollers (11, 12, 13, 14) placed along a set path (P) , each composed of a top roller (11, 13) with a helical thread (15) , and an anvil roller (12, 14) , by which the fibres of the strip (2) are stretched and pulled longitudinally and / or transversely; when seen in section, the profile (16) of the helical thread (15) is such that each turn presents a crest portion (17) merged with two flanks (19) by way of smooth and / or rounded portions (20) , so that when the strip (2) of filter material is engaged by the crest portion (17) , it will not be brought into contact with sharp corner edges.

Description

technical field [0001] The invention relates to a plant for processing at least one filter material tow in the tobacco industry. Background technique [0002] The prior art comprises apparatus for processing a tow of filter material which is fed along a predetermined path and which, as it advances along this path, is caused to undergo successive processing steps before being introduced into a filter making machine. [0003] Generally, these steps will include longitudinal and / or transverse pulling or stretching operations, as well as steps for treating the bundle with additional material. [0004] The aforementioned pulling or stretching operations are accomplished using pairs of rolls, each pair usually consisting of a threaded roll and a backup roll. [0005] It has been found that during these longitudinal and / or transverse pulling or stretching operations, the constituent fibers of the tow are subjected to damage and rupture, which, as a result, adversely affects the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24D3/02
CPCA24D3/0204
Inventor A·特瑞尼L·巴拉蒂
Owner GD SPA