IE19950B1 - Cigarettes. - Google Patents

Description

INDUSTRIAL AND COMMERCIAL PROPERTY REGISTRATION OFFICE.

PATENT SPECIFICATION Application Date, jannary 29th, 1951. No. 69/51.

Date of Acceptance of the Complete Specification, February, 10th, 1954.

Date Accorded under Section 152, faniiary 28th, 1950 (Great Britain).

Class (es) : 79.

COMPLETE SPECIIFICATION Improvements in cigarettes with filter plugs or other internal mouth- pieces and methods and machinery used in their production.

Patent application by Ardath Tobacco Company Limited, a British company, of 1-15 Worship Street, London, E02, Eng- land, in part assignees of Joseph Neal Sweeney, of 42a Brampton Grove, Hendon, London, N .W.4., England and Brian Michael Green, of 245 Haverstock Hill, Hampstead, London, N.W.3., England, both British subjects.

This invention relates to cigarettes with filter plugs or other internal mouthpieces, and to methods and machinery used in their production.

When such a cigarette is smoked dovm close to the filter plug or other internal mouthpiece there is a tendency for the burn- ing tobacco “coal” to fall out, thus incurr- ing a fire danger.

The object of the present invention is to avoid or minimise this Gefect, but Without involving any or any appreciable adhesive attachment of the tobacco to the paper cover- ing in the completed cigarette, prior to the smoking thereof, so that if the cigarette should be rejected for any reason and not smoked, all the tobacco (except possibly a trace) can readily be separated from the paper and recovered for re—use by the manu- factnrer.

The present invention consists in a cigar- ette With a filter plug or other internal mouth- piece in which the paper covering enclosing the tobacco has applied adjacent the mouth- piece an internal coating which includes fire- retardants and has been so applied or is of such a character that normally it does not‘ adhere or adhere appreciably to the tobacco, but is such that When the cigarette is smoked down close to the end of the tobacco portion the heat or other effects of the smoking will not cause the coating to burn substantially, but will render the coating effective as an adhesive so that the adjacent tobacco will then stick to the paper covering and thus the burning tobacco "coal” is retained or tends to be retained within the paper cover- ing Without falling out, but if the cigarette is rejected for any reason and not smoked, all the tobacco can readily be recovered (e.g. by slitting the paper covering), and no tobac- co or only a trace of tobacco will be left ad- hering to the paper.

The present invention also consists in cigar- — ette lengths adapted to be used making such cigarettes, and" in methods of manufacture and cigarette making machines as set out in Price Two Shillings and Sixpence. _ the appendant claims.

Various forms of the present invention are diagrammatically indicated in the accom- panying drawings, in which :— Fig. 1 is a longitudinal cross section of one form of the improved cigarette, being of the kind in which the paper covering enclosing the tobacco does not extend to enclose the filter plug or other internal mouthpiece but is secured thereto by an encircling band ; Fig. 2 is a longitudinal cross section of another form of the improved cigarette, being of the kind in which the paper covering en- closing the tobacco extends so as also to enclose the filter plug or other internal mouth- piece ; Fig. 3 is a longitudinal cross section of an improved cigarette length to be combined with internal mouthpiece material to make a cigarette as indicated in Fig. 1 ; Fig. 4 is a longitudinal cross section of another form of improved cigarette length to be combined with internal mouthpiece ma- terial to make two cigarettes each as indicat- ed in Fig. 1 ; Fig. 5 is a longitudinal elevation of an improved cigarette making machine for use in making cigarette lengths as indicated in Figs. 3 and 4 I Fig. 6 is a partial longitudinal elevation thereof to a larger scale ; Fig. 7 also to a larger scale than Fig. 5 indicates a partial longitudinal section there- of.

Referring to Fig. 1, the cigarette there indicated is of the known kind including’ a tobacco portion 1 enclosed by its paper covering 2, the Whole being secured to a filter plug or other internal mouthpiece 3 by an encircling band 4.

In this kind of cigarette the paper covering 2 does not extend to enclose the filter plug or other internal mouthpiece 3.

Referring to Fig. 2, the cigarette there in- dicated is of the known kind including a tobacco portion 1 enclosed by its paper covering 2, that extends so as also to enclose a filter plug or other internal mouthpiece 3.

The present invention can be applied to cigarettes of both these kinds, and in each case the paper covering 2 has adjacent the mouthpiece 3 an internal coating 6 which includes fire retardants and has been so applied or is of such a character-that it does not adhere or does not adhere appreciably to the tobacco under normal conditions, that is, prior to the smoking of the completed cigar- ette, but is such that when the cigarette is smoked down close to the end of the tobacco portion, the heat or other effects of the smok- ing Will not cause the coating to burn sub- stantially, but will render the coating effec- tive as an adhesive so that the adjacent tobacco 5 will stick to the paper covering 2, and thus the burning tobacco “coa ” is re- tained or tends to be retained within the paper covering without falling out.

If, however, the cigarette is rejected for any reason and not smoked, then it will be possible for the manufacturer readily to re- cover for re-use all the tobacco therein _(e.g., by the usual operation of slitting the paper covering) and no tobacco or only a trace of tobacco will be left on the paper.

The kind of cigarette shown in Fig. 1 is conveniently made by first making cigarette lengths of the kind shown in Fig. 3, such cigarette lengths including at one end a suit- able coating 6. This cigarette length" is then combined in a known machine With internal mouthpiece material 3 to make the cigarette indicated in Fig. 1, in which said mouthpiece material 3 is secured to the cigarette length by "an encircling band 4, which then consti- tutes a "cor ” or like tip. ' Alternatively and more conveniently a. cigarette length of the kind shown in Fig. 4 may first be made, such cigarette length being of double the length indicated in Fig. 3 and including at each end a suitable coat- ing. This cigarette length is then combined in a known machine with internal mouth- piece material 3 at each end to make (after bisection at the line 7) two cigarettes as in- dicated in Fig. 1, in which in each of the two cigarettes the mouthpiece material 3 is secured to the cigarette length concerned by an encircling band 4.

Practically any substance used as an ad- hesive which will run satisfactorily is suitable for use as a coating, provided that it in- cludes fire-retardants so that it will not burn or not readily burn, and provided that when dry it can be rendered effective as an ad- hesive by the heat or other effects of smok- mg.

The method of application of the coating will differ depending on whether or not the coating, after operative application while wet is effective as an adhesive when dried.

When, after such application, the coating is effective as an! adhesive and remains so effective when dried, it will be necessary to dry it or substantially dry it by heat, or to substantially so dry its upper surface before the tobacco comes into contact with it.

A suitable coating of this type is :— A highly dextrinised starch containing approximately

Claims (11)

1. A cigarette with a filter plug or other internal mouthpiece, in which the paper covering enclosing the tobacco has applied adjacent the mouthpiece an internal coating which includes fire-retardants and has been so applied or is of such a character that normally it does not adhere or adhere apprec- iably to the tobacco, but is such that when the cigarette is smoked down close to the end of the tobacco portion, the heat or other effects of the smoking will not cause the coating to burn substantially, but will render the coat- ing effective as an adhesive so that the adjac- ent tobacco will then stick to the paper cover- ing, and thus the burning tobacco “coal” is retained, or tends to be retained, within the paper covering without falling out, but if the cigarette is rejected for any reason and not smoked, all the tobacco can readily be re- covered (eg, by slitting the paper covering) and no tobacco or only a trace of tobacco will be left adhering to the paper.

2. A cigarette length adapted to be com- bined with internal mouthpiece material and made into one or two cigarettes in accor- dance with claim 1, in which the cigarette length includes at its ends or at the appro- priate end, the said coating.

3. A method of manufacturing on the con- tinu ous rod principle cigarettes in accordance with claim 1, or cigarette lengths in accor- dance with claim 2, in which the coating is applied to the appropriate parts of the paper web, and dried or substantially dried by heat or its exposed surface so dried before reach- ing the place where the tobacco comes into Contact therewith.

4. A method of manufacturing on the con- tinu ous rod principle cigarettes in accordance with claim 1, or cigarette lengths in accor- dance with claim 2, in which the coating used is of the kind that after operative appli- cation in the wet state ceases to be effective as an adhesive when dried without heat, but becomes effective when the cigarette is smok- ed, and the coating is applied to the appro- priate parts of the paper web before reaching the place where the tobacco comes into con- tact therewith, no heating being required to prevent the tobacco adhering or appreciably adhering to the coating.

5. A cigarette making machine for carry- ing out the method of manufacturing set out in claim 3, comprising an applying device adapted to apply the coating in liquid form to the appropriate parts of the paper web, and a heater adapted to heat the paper web after the coating has been applied and before reaching the place where the tobacco is applied thereto.

6. A cigarette making machine as claimed in claim 5, in which the heater is located on the side of the paper that has been coated, and the heating effect is such as to dry the exposed surface of the coating, but without completely drying the coating throughout.

7. A cigarette making machine as claimed in claim 5 or 6, in which the stopping of the machine causes the heater to move out of close proximity to the paper web, so as to avoid burning thereof.

8. The improved cigarettes, with filter plug or other internal mouthpieces, substan- tially as hereinbefore described and illustrat- ed in the accompanying drawings.

9. The improved cigarette lengths, adapt- ed to be combined with internal mouthpiece- material to make cigarettes with filter plug or other internal mouthpieces, substantially as hereinbefore described.

10. The improved method of making in- ternal mouthpiece cigarettes in accordance with claim 1, or cigarette lengths in accor- dance with claim 2, substantially as herein- before described.

11. The improved cigarette making ma- chines, to be used for or in the production of internal mouthpiece cigarettes in accor- dance with claim 1, substantially as herein- before described. Dated this 1st day of February, 1954. "TOMKINS & CO. ' Switzers Building, 94 Grafton Street, Dublin. Applicants’ Agents. Published at the Industrial and Commercial Property Registration Office, 45 Merrion Square, Dublin, from which copies may be obtained. '