Method of the production of cigarette filters

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, said granular filling material including anhydrous manganese dioxide and material from a group composed of 3% to 12% of copper nitrate and 4% to 14% of silver nitrate, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, said granular filter material including activated charcoal provided with a coating of paint which does not affect its chemical effectiveness, an acid-sensitive indicator undergoing a color change under the influence of an acid, a base-sensitive indicator undergoing a color change under the influence of a base, and an oxidation catalyst for oxidizing carbon monoxide to carbon dioxide and including anhydrous manganese dioxide and material from a group composed of 3% to 12% of copper nitrate and 4% to 14% of silver nitrate, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filter material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, including activated charcoal provided with a coating of paint which does not effect its chemical effectiveness, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said activated charcoal by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, said granular filling material including manganese dioxide and material from a group composed of 3% to 12% of copper nitrate and 4% to 10% of silver nitrate, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health, and at least partially absorbs said constituents, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and a filling device adapted to hold granular filter material, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health and at least partially binds said specific constituents, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and a filling device adapted to hold granular filter material, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health, and converts said specific constituents into constituents which do not effect a smoker's health, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adaped to hold granular filter material, said granular filling material containing an acid-sensitive indicator undergoing a color change under the influence of an acid, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in intimate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

In a method of producing a cigarette filter with the aid of

• a continuous and transparent covering strip of a constant width and having smooth surface portions,
• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, said filling material containing a base-sensitive indicator undergoing a color change under the influence of a base, and wherein at least a portion of said granular filling material becomes colored when coming in contact with specific constituents of the smoke affecting a smoker's health, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof, so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip, and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in initmate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.

A cigarette filter produced with the aid of a continuous and transparent covering strip of a constant width and having smooth surface portions,

• a sealing strip of a width considerably smaller than the width of the covering strip, and
• a filling device adapted to hold granular filter material, the cigarette filter being provided with a chamber for holding said granular filter material, said filter material being visible through said chamber, the steps in producing said cigarette filter comprising:
• spacing a plurality of filter elements successively apart at uniform separating distances, said covering strip having a width within a range of 75% to 93% of the circumference of said filter elements,
• joining said filter elements to said continuous covering strip along a longitudinal portion thereof so as to cover said filter elements continuously to form a filter cord having a plurality of said chambers, and so that lateral edges of said covering strip define a slit having a width slightly smaller than the width of said sealing strip and extending over the entire length of said filter cord, as well as define a plurality of openings extending over said separating distances, respectively, in said filter cord,
• sliding said filling device over said openings in initmate contact with the smooth surface portions of said covering strip,
• filling the chambers with said granular filling material by said filling device,
• sealing the chambers upon completion of the filling step by said sealing strip, and
• cutting said filter cord into a plurality of individual sections.