US3646855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing a tobacco filter rod or cord from a web of fibrous material
Assignee: Celfil Co
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Filing: 1959-09-01
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Granted: 1972-03-07
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Expires: 1979-09-01
Abstract
Abstract Apparatus and process for treating paper strip material to render it particularly adapted to be gathered and enclosed in a wrapper to make a filter cord subdividable into efficient cigarette filters. The paper is first moistened to prevent undue tearing in a longitudinal grooving and lateral stretching treatment which loosens and exposes fibers by passage through the nip between heated meshing rollers of rigid material having alternating circumferential grooves and ridges. After being grooved and stretched the paper is dried to set the grooves, and optionally flattened somewhat by a knurling operation. The grooving and stretching may be carried out by successive sets of rollers wherein the following sets may be operated at a higher peripheral speed to stretch the paper longitudinally.
Inventors
- 👤 Paul Adolf Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:20
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
In an apparatus of the character described, means for feeding a fibrous web, a pair of web-mutilating rollers between which the web is moved, said rollers having axially spaced circumferential grooves separated by circumferential stamping edges which lacerate the web and tend to separate the fibers Thereof without destroying the transverse continuity of the web, the edges of one of the rollers entering between the edges in the second roller, tensioning means to which the web is subjected after leaving the mutilating rollers to thereby stretch the web longitudinally, means for compacting the web, means for delivering a wrapper together with the compacted web to forming mechanism which applies the wrapper around the compacted web to form a filter rod, and means for severing the rod into sections of predetermined length.
Claim 2
Dependent Claim
131 words
In an apparatus of the character described, means for feeding a fibrous web, a pair of web-mutilating rollers between which the web is moved, said rollers having axially spaced circumferential grooves separated by circumferential stamping edges which lacerate the web and tend to separate the fibers Thereof without destroying the transverse continuity of the web, the edges of one of the rollers entering between the edges in the second roller, tensioning means to which the web is subjected after leaving the mutilating rollers to thereby stretch the web longitudinally, means for compacting the web, means for delivering a wrapper together with the compacted web to forming mechanism which applies the wrapper around the compacted web to form a filter rod, and means for severing the rod into sections of predetermined length.
Claim 3
Dependent Claim
65 words
The process of manufacturing an elongated strip of cellulosic material particularly adapted for the formation of filters for tobacco smoke, comprising the steps of grooving paper strip longitudinally while preventing any substantial transverse shrinkage thereof to provide a strip characterized by a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, and compressing the grooved strip.
Claim 4
Dependent Claim
65 words
The process of manufacturing an elongated strip of cellulosic material particularly adapted for the formation of filters for tobacco smoke, comprising the steps of grooving paper strip longitudinally while preventing any substantial transverse shrinkage thereof to provide a strip characterized by a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, and compressing the grooved strip.
Claim 5
Dependent Claim
25 words
The process defined in claim 2 including the additional steps of moistening the strip before grooving and drying the strip after grooving and before compressing.
Claim 6
Dependent Claim
72 words
The process of manufacturing an elongated rod of cellulosic material adapted for the efficient filtration of tobacco smoke comprising the steps of grooving paper strip longitudinally while preventing any substantial transverse shrinkage thereof to provide a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, compressing the grooved strip, and consolidating said strip to form a substantially cylindrical rod longitudinally permeable to gases.
Claim 7
Dependent Claim
72 words
The process of manufacturing an elongated rod of cellulosic material adapted for the efficient filtration of tobacco smoke comprising the steps of grooving paper strip longitudinally while preventing any substantial transverse shrinkage thereof to provide a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, compressing the grooved strip, and consolidating said strip to form a substantially cylindrical rod longitudinally permeable to gases.
Claim 8
Dependent Claim
25 words
The process defined in claim 4 including the additional steps of moistening the strip before grooving and drying the strip after grooving and before compressing.
Claim 9
Dependent Claim
71 words
The process of manufacturing an elongated strip of cellulosic material, particularly adapted for the formation of filters for tobacco smoke, comprising the steps of grooving said strip longitudinally while preventing any substantial transverse shrinkage thereof to at least partly pull apart the paper fibers and to provide a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, and compressing the grooved strip.
Claim 10
Dependent Claim
71 words
The process of manufacturing an elongated strip of cellulosic material, particularly adapted for the formation of filters for tobacco smoke, comprising the steps of grooving said strip longitudinally while preventing any substantial transverse shrinkage thereof to at least partly pull apart the paper fibers and to provide a plurality of parallel connected loops each having a ridge portion, the adjacent ridges being faced in opposite directions, and compressing the grooved strip.
Claim 11
Dependent Claim
25 words
The process defined in claim 6 including the additional steps of moistening the strip before grooving and drying the strip after grooving and before compressing.
Claim 12
Independent Claim
127 words
The method of treating an elongated web of fibrous material to render the same particularly adapted to be gathered laterally, formed into a generally cylindrical rod, and enclosed in a wrapper to make a filter for tobacco smoke, the steps comprising: moistening said web to soften and render the same yielding; passing the moistened web between opposed heated grooving rolls each of rigid material and having a plurality of interfitting circumferential grooves and ridges which engage the web and prevent any substantial transverse shrinkage thereof, thereby forcing said web into said grooves to both form in said web a plurality of closely spaced longitudinal corrugations and laterially stretch the material of the softened web to loosen and expose the fibers thereof; and drying the corrugated stretched web.
Claim 13
Independent Claim
127 words
The method of treating an elongated web of fibrous material to render the same particularly adapted to be gathered laterally, formed into a generally cylindrical rod, and enclosed in a wrapper to make a filter for tobacco smoke, the steps comprising: moistening said web to soften and render the same yielding; passing the moistened web between opposed heated grooving rolls each of rigid material and having a plurality of interfitting circumferential grooves and ridges which engage the web and prevent any substantial transverse shrinkage thereof, thereby forcing said web into said grooves to both form in said web a plurality of closely spaced longitudinal corrugations and laterially stretch the material of the softened web to loosen and expose the fibers thereof; and drying the corrugated stretched web.
Claim 14
Dependent Claim
141 words
Apparatus for treating an elongated web of fibrous material to render the same particularly adapted to be gathered laterally, formed into a generally cylindrical rod, and enclosed in a wrapper to make a filter for tobacco smoke, comprising: means for moistening the web to soften and render the same yielding; roller means for simultaneously longitudinally grooving and laterally stretching the material of the moistened web to provide therein a plurality of closely spaced longitudinal corrugations and to loosen and expose the fibers thereof, said roller means including at least one pair of heated rollers each of rigid material and having a plurality of circumferential grooves separated by ridgeS of lesser width which project into the grooves on the other roller of said pair; and means for drying the grooves and stretched web to reharden the same and set said corrugations therein.
Claim 15
Dependent Claim
141 words
Apparatus for treating an elongated web of fibrous material to render the same particularly adapted to be gathered laterally, formed into a generally cylindrical rod, and enclosed in a wrapper to make a filter for tobacco smoke, comprising: means for moistening the web to soften and render the same yielding; roller means for simultaneously longitudinally grooving and laterally stretching the material of the moistened web to provide therein a plurality of closely spaced longitudinal corrugations and to loosen and expose the fibers thereof, said roller means including at least one pair of heated rollers each of rigid material and having a plurality of circumferential grooves separated by ridgeS of lesser width which project into the grooves on the other roller of said pair; and means for drying the grooves and stretched web to reharden the same and set said corrugations therein.
References Cited (Backward Citations)
US3238852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |