FILTER CIGARETTE HAVING APERTURED BAND

• US 3,590,825 A
• Filed: 11/29/1967
• Issued: 07/06/1971
• Est. Priority Date: 02/27/1964
• Status: Expired due to Term

• Current Assignee: Alfred C. Davis
• Original Assignee: Alfred C. Davis
• Inventors: Davis, Alfred C.
• Application Number:
  US04/686,482
• Time in Patent Office: 1,315 Days
• US Class Current: 131/336
• CPC Class Codes: A24D 3/043 with ventilation means, e.g. air dilution A24D3/041 takes precedence

Abstract

A cigarette, cigarillo or cigar having a tobacco portion and a stub portion, the stub portion having two sections arranged end to end to form a butt joint, and a band of impermeable material which joins the portions together and surrounds the butt joint, wherein the butt joint is completely covered and the joining band has at least one permeable area at the butt joint for controlling the entry of air at the butt joint. The permeable area of the band is thinner than the remainder of the band. The thinned area is made by shaving off a portion of the surface of the band.

Claims

1. A cigarette comprising a wrapped charge of tobacco and a filter stub, the stub having first and second ends open to permit the passage of air and smoke and having an outer surface between the said ends, said stub comprising at least two sections between said first and second ends, said sections abutting at a butt joint, an end of the said wrapped charge of tobacco abutting an end of the said stub such that smoke may be drawn through the tobacco of the stub and extending across the said butt joint so as to completely cover the joint and so as to cover a measurable portion of both sections of the outer surface of the stub to connect together the two sections of the stub, said band also extending across the abutting ends of the stub and the wrapped charge of tobacco to join the stub and the wrapped charge of tobacco together, said band being substantially impermeable to air except that the part of the band covering the said butt joint has at least one area which is permeable to air, thereby permitting a controlled and limited passage of air through the permeable area into and through the said joint, the said area being of a size which is larger than a conventional pinhole, the amount of air which enters at the butt joint being determined by the amount of the circumference of the butt joint covered by the said permeable area and the degree of permeability of the said permeable area, said permeable area being constituted by one or more portions which are thinner than the remainder of said substantially impermeable band and said cigarette being radially impermeable between the said butt joint and tHe end of the stub remote from the wrapped charge, except for the said permeable area.

2. A cigarette as claimed in claim 1 wherein said thinned portion comprises a shallow recess in the otherwise substantially impermeable band.

3. A cigarette according to claim 1, wherein said permeable area comprises a plurality of separate thinner portions spaced apart around the periphery of said butt joint.

4. A cigarette according to claim 1, wherein said permeable area consists of a single continuous thinner portion extending around the periphery of said butt joint.

5. A composite cigarette comprising a wrapped charge of tobacco and a stub portion attached together, said stub comprising at least two sections which abut at a butt joint, said sections being connected together by an encircling band which is provided with at least one area larger that a conventional pinhole and of greater porosity than the remainder of the band, said band also extending across the abutting ends of the stub and the wrapped charge of tobacco to join the stub and the wrapped charge of tobacco together, whereby secondary air may be drawn into and through the said butt joint of the cigarette through said area, characterized in that said area extends across the plane of abutment between said sections of the stub, said area being constituted by one or more portions which are thinner than the remainder of the band and said cigarette being radially impermeable between the said plane of abutment and the end of the stub remote from the wrapped charge of tobacco except for the said area of greater porosity.

6. A method of producing a cigarette of the type having a wrapped charge of tobacco and a filter stub, said stub comprising at least two sections which abut at a butt joint and are attached together by an encircling band, comprising the steps of:

a. forming in a band of substantially impermeable material at least one thinned area highly permeable to air by shaving off a portion of the surface of the band, and b. attaching the band to the cigarette to join together the two sections of the stub, such that the said thinned area overlies the said butt joint such that air may be drawn into and through the butt joint through the thinned area.