US2852987A - Process and machine for producing rods for tobacco filters - Google Patents

Description

K. SCHANZ Sept'.v 23, 1958 Filed Aug. :5. 1955 2,852,987 Patented Sept. 23, 1958 PROCESS AND MACHINE FUR PRODUCING RODS FOR TOBACCO FILTERS Karl Schanz, Eislingen (Fils), Germany, assigner to Papierfahrik Fleischer G. m. b. H., Eislingen (Fils), Wurttemberg, Germany Application August 3, 1953, Serial No. 372,066

Claims priority, application Germany August 6, 1952 12 Claims. (Cl. 9.3-1)

This invention relates to a machine and a method for producing rods for tobacco smoke filters, especially for cigarettes and the like as well as for other uses.

It is an object of the invention to produce sheet or strip of material at least in a single layer as for example a silk-like paper and which is pressed and cut into narrow strip form which is crimped to form a wool-like band in the exact cross section of the filter mass desired to be produced. Thus a wool strip of paper like material is produced which is fibrous if desired. It is, therefore,

' a further object of the invention to produce not only a lter material of wool form but also to process the wool into a rod or strip having the desired diameter or cross section of the finished filter object or element. In this way it is possible to produce a filter having a uniform density of the filter wool so that when the rod of formed material is cut into the desired filter cartridges, each individual cartridge has the same characteristics. In this way it is possible to produce uniform cartridge filters having the same density for each individual cartridge.

A still further object of the invention resides in the provision of a wool band or rod to be installed as a continuous element to be provided in an automatic coincontrolled machine of any known design to dispense filter cartridges into a paper shell or the like. The machine may be designed to dispense only long lter rods or it may be so arranged to dispense filter cartridges or rods of short length cut as desired.

It is `another object of the invention to provide a process in which the paper material may be fed continuously from a strip of material wound on a roll or the paper material may be fed from a supply source in sections. The paper material has a suiiicient porosity so that the finished Wool filter may be compressed into the desired density. Any desired material may be chosen to manufacture the filter wool.

It is also an object of the invention to provide a machine for producing lter cartridges in which stripping means are provided between the cutting discs of the cutting rollers and associated with a pair of forwarding rollers. The relative rotation of the forwarding or conveying rollers and the cutting rollers is adjustable and may be adjusted relative to the desired corrugations to be worked into the band.

Further objects will be apparent from the following description whenconsidered in connection with the accompanying drawings in which:

Fig. 1 is a diagrammatic side elevation of the machine for producing the filter rod, and

Fig. 2 is a top plan view of the machine.

The paper supply rolls 1, 3 and 5 are suitably mounted on a machine frame, not shown, which is preferably tissue paper and rotatable on shafts 2, 4 and 6 respectively. T he webs withdrawn from the rolls 1 and 3 unite into a single combined strip or web 7 which is drawn over a table or plate 8, whereas the web or strip 9 from the roll is pulled over another table or plate 10. The web 7 travels between the cutting or creasing rollers 11 and 12 which alternately project into each other by means of cutting blades. Between the cutting blades or discs of the roller 11 strip removing means or strippers 13 are provided and between the blades of the roller 12 there is a similar removing means or strippers 14. The

removing means prevent the cut strips from being carried along between the rotating cutting rollers. The web 9 is pulled over the table 10 between two rollers 15 and 16 corresponding to rollers 11 and 12, between which cutting discs the stripping means 17 and 18 project.

A` pair of conveying rollers 19 and 20 are provided spaced from the cutting rollers 11 and 12 and from the stripping means 13 and 14 in the direction of feed of the strip 7. The relationship of the rate of rotation of the rollers 19 and 20 relative to the rotation of the cutting rollers 11 and 12 may be regulated and may for example be so set that the cut strips from the rollers 19 and 20 may be held back. A specific crimping will be attained by the feed of the cut strips on the stripping off device, in dependence on what is attained by the rollers 19 and 20. It is preferable that the rotational speed of the rollers 19 and 20 is regulatable. Behind the cutting point of the band 9 formed by the -rollers 15 and 16 there are provided rollers 21 and 22 which correspond to 19 and 20. The fiber or wool-like band 23 issuing from between the rollers 21 and 22 is conveyed further over a conveyor belt 24 and joins the ber or wool-like band 25 issuing from between the rollers 19 and 20, to form a common wool band 26. The band 26 is fed into a trough or basin 27 and runs along upper part of a conveyor band 2S which is driven by a drive pulley 29. Over the band 28 forming rollers 30 and 31 are provided] which project into the trough and together with the conveyor band form a rod or strip 32 from the band 26. This takes place inthe example shown due to the conveyor band 33 supporting and conveying the strip 32 to a trough 34 in which it is conveyed with the aid of the forming rollers 35 and 36 and thereafter is wound with paper. The thus formed filter rod is cut into short lengths to thus form the filter cartridges.

The various movable parts of the machine are driven from a common driving wheel or pulley 37 from any suitable motor and the like, not shown, so that the various parts will move in the proper relationship.

The forming of the filter wool into rods can be carried out with various modied parts as for example by guide troughs having converging sides. The materials of which the filter wool is produced may be treated with various chemical substances as desired which effect the tobacco smoke in various ways. Also the filter wool may be sprayed with various chemicals depending upon the results desired. Likewise the` completed filter rod or the filter cartridges themselves may be saturated with various desired chemicals. The filter rods and cartridges are not necessarily limited in use to be associated with tobacco products such as cigarettes but may be used as filters for various other purposes.

The filter wool may be made in any desired color and may be treated to emit any desired smell or taste.

It is also possible within the scope of the invention to Vinclude as many cutting and conveying rollers as desired and also the direction of movement of the material may be directed in any direction or directions.. It is also possible to vary the density of the lter wool.

I claim as my invention:

l. A machine for producing tobacco smoke filters and the like comprising means for feeding a strip material from a roll, cooperating cutting rollers to cut the strip material into narrow Widths, each cutting roller having a plurality of adjacent cutting discs, a stripping device for each tWo adjacent cutting discs, a conveying means in the form of an endless band which in the upper run of the band vassumes 1- thevform -of a vtrough -toimpart `a preliminary compression to the strips of material, and means mounted above the band and projecting into the trough-to lfurther lcompress the 'strips'of material and nallylform them into a rod.

-2.1A5machine 'according toclaim 1, in ywhich means are provided to adjust the `speed of the conveyor band anda cooperating'roller relative to theV speed of the cuttingrollers.

'3. -A machine'for producing tobacco smoke lters and thelike comprising means for feeding a strip material from `a roll, cooperating cutting rollers to cut the strip material vinto narrow widths, each cutting roller having a plurality of adjacent cutting discs, astripping device foreach two "adjacent cutting discs, a conveying means in the form of an endless band which in the upper run ofthe band assumes the form of a trough to impart a preliminary compression to the strips vof material, and means mounted above the band and projecting into the trough to further compress the strips of material and nally form them into a rod, the last-mentioned means being in the form of at least one roller.

4. A machine for producing tobacco smoke lters and the like comprising means for feeding a strip material from a roll, cooperating cutting rollers to cut the strip material into narrow widths, each cutting roller having a plurality of adjacent cutting discs, a stripping device for each two adjacent cutting discs, a conveying means in the form of a pair of spaced endless bands following one after the other and each having its upper run assuming the form of a trough to impart a preliminary compression of the strips of material as to the belt adjacent the cutting rollers, and means mounted above the bands and projecting into the troughs thereof to further compress the -strips of material and finally form them into a r'od.

e5. A machine for producing tobacco smoke lters and the like comprising means for feeding a strip material from a roll, -cooperating cutting rollers to cut the strip material into narrow widths, each cutting roller 'having a plurality `of adjacent cutting discs, a stripping device for each two adjacent cutting discs, a conveying means in the form of a pair of spaced endless bands following one after the other and each having its upper run assuming the form of a trough to impart a preliminary compression of the strips of material as to the belt adjacent the cutting rollers, and means in the form of a pair of'rollers mounted above each band and projecting into the troughs thereof to further compressthe strips of material and finally form them into a rod.

6. A method for producing filter rods particularly for tobacco smoke filters for cigarettes comprising feeding material in'sheet form in at least one layer and cutting such sheet material continuouslyinto a plurality of narrow llongitudinal strips, crimping the strips of `material against the direction of movement of the strips immediately after-the cutting of the sheet material into strips to such an extent to produce a wool-like eece of the material, and compressing and shaping said fieece to form a ileece rod of circular cross section and of a diameter approximately equal to the `diameter of the cigarette and wrapping the rod in a paper sheet.

7. A method for producing lter rods particularly for tobacco smoke filters for cigarettes comprisingifeeding material in sheet form in at least one layer and cutting such sheet material continuously into a plurality of narrow longitudinal strips, crimping the strips of material against the direction of movement of the strips immediately after the cutting of the sheet material into strips, to such an extent to produce a wool-like fleece, vcompressing and shaping said fleece to form a leece rod of circular cross section and of a diameter approximately equal to the diameter of the cigarette and wrapping the red in a paper sheet, and cutting the wrapped rod into the desired cartridge lengths.

8. A method for producing lter rods particularlyfor tobacco smoke iilters for cigarettes comprising feeding a plurality of sheets of material and cutting each sheet into a plurality of narrow strips, crimping the strips of material against the direction of movement of the strips immediately afterthe cutting of the sheet material into strips to such an extent to produce a wool-like eece, compressing and shaping said fleece to form a fleece rod of circular cross section and of a diameter approximately equalto the diameter of the cigarette.

9. A method according to claim 8, in which the cornpressing and shaping of the crimped strips takes place first laterally and then from the top downwardly.

l0. A method for producing filter rods particularly for tobacco smoke iilters for cigarettes comprising feeding a plurality of sheets of material and cutting each sheet into a plurality of narrow strips, crimping the strips of material against the direction of movement of the strips immediately after the cutting of the sheet material into strips to such an extent to produce a woollike fleece, compressing and shaping said fleece to forma iieece'rod of circular cross section and of a diameter approximately equal to the diameter of the cigaretteand wrapping the rod with a paper sheet and cutting the wrapped rod into' the desired cartridge lengths.

l1. A machine for producing tobacco smoke filters and the like comprising a plurality of rolls for feeding sheet material from each roll, cooperating cutting -rollers for each sheet material to cut the sheet material into narrow widths, each cutting roller having a plurality of adjacent cutting discs, a stripping device for each pair of cutting cooperating rollers to crimp each strip of material, a conveying means in the form of an endless band which in its upper run of the band assumes the form of a trough to impart a preliminary compression to all the strips of material, and means mounted above the band and projecting into the trough to further compress the strips of material and nally form them into a rod.

12. A machine according to claim 1l, in which means are provided to adjust the speed of the conveyor band and a cooperating roller relative to the speed of the cutting rollers.

References Cited in the tile of this patent UNlTED STATES PATENTS 2,039,298 Davidson May 5, 1936 2,202,843 Edwards June 4, 1940 2,221,443 Davidson Nov. 12, 1940 2,621,567 Lee Dec. 16, 1952 2,786,399 Mason et al. Mar. 26, 1957

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