Device and method for making packaging bags
AssigneeFlexico-France
InventorHenri-Georges Bois
Life of this patent
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Abstract
An apparatus for forming reclosable bags, wherein said bags are formed from a continuously film (12) fitted with at least one closure tape (60), wherein the apparatus comprises a set of heat-sealed jaws (30) provided transversely relative to the travel direction of the film (12), at least one sensor (100) that if the tape (60) is present or not on the film in a predetermined position relative to the heat-sealed jaws, and means suitable to reposition correctly the film in regard of the heat-sealed jaws when the sensor detects a default in the position of the tape, so as to eliminate drift due to the elasticity of the film.
Claims16
A method of forming reclosable packaging bags using a continuously traveling film fitted with at least one closure tape (60), which extends transversely to a longitudinal travel direction of the film, wherein the method comprises;
- cyclically sealing the film with a set of heat-sealing jaws (30) provided transversely relative to the travel direction of the film (12);
- detecting a default in position of the tape (60) on the film by means of at least one sensor (100) provided in a predetermined position relative to said heat-sealing jaws;
- and repositioning the film correctly in relation to the heat-sealing jaws when the sensor detects a default in the position of the tape, so as to eliminate drift due to the elasticity of the film,
- wherein the sensor comprises dual feelers that are juxtaposed in the longitudinal travel direction of the film,
- and wherein the repositioning is by repositioning means responsive to the detection of the default in the position of the tape by the at least sensor.
An apparatus for forming reclosable bags, wherein said bags are formed from a continuously traveling film (12) fitted with at least one closure tape (60), which extends transversely to a travel direction of the film, wherein the apparatus comprises;
- a set of heat-sealing jaws (30) provided transversely relative to the travel direction of the film (12);
- at least one sensor (100) provided in a predetermined position relative to said heat-sealing jaws, said sensor detecting a position of the tape or not on the film, wherein the sensor comprises dual feelers that are juxtaposed in the longitudinal travel direction of the film;
- and
- means to reposition the film correctly in relation to the heat-sealing jaws when the sensor detects a default in the position of the tape, so as to eliminate drift due to the elasticity of the film,
- wherein said repositioning means is responsive to detection of the default position by the sensor.
An apparatus for forming reclosable bags, wherein said bags are formed from a continuously traveling film (12) fitted with at least one closure tape (60), which extends transversely to a longitudinal travel direction of the film, wherein the apparatus comprises:
- a set of heat-sealing jaws (30) provided transversely relative to the travel direction of the film (12);
- at least one sensor (100) provided in a predetermined position relative to said heat-sealing jaws, said sensor generating a first signal when it detects a thickness corresponding to the presence of the closure tape and generating a second signal corresponding to a default signal when it detects a thickness less than the thickness of the closure tape, wherein the sensor comprises dual feelers that are juxtaposed in the longitudinal travel direction of the film;
- and
- means for positioning the film correctly in relation to the heat-sealing jaws when the sensor detects a default in the position of the tape, so as to eliminate drift due to the elasticity of the film, wherein said repositioning means is responsive to said default signal.
Dependencies are inferred from the claim text.