System, nozzle, and method for coating elastic strands
AssigneeNordson Corporation
InventorsJoel E. Saine, Charles P. Ganzer
Life of this patent
Estimating the term…
Abstract
A contact nozzle for coating an elastic strand with an adhesive. Air is discharged at the adhesive in contact with the strand, causing the adhesive to spread around the periphery of the strand. The air assists with release of the adhesive from the nozzle and also cleans the nozzle to discourage adhesive build-up on the nozzle.
Claims68
A contact nozzle for coating at least one elastic strand with an adhesive, a first strand having a periphery with an upper surface and moving in a machine direction, the contact nozzle comprising:
- a nozzle body including a first slot for receiving the first strand;
- a first adhesive passage formed in said nozzle body and terminating at a first adhesive orifice communicating with said first slot and adapted to be directed at the upper surface of the first strand to deliver the adhesive into contact with the upper surface of the first strand;
- and
- a first air passage positioned proximate to said first adhesive passage and terminating at a first air orifice positioned downstream from said first adhesive orifice in the machine direction, said first air orifice adapted to be directed toward the upper surface of the first strand and adapted to discharge air at the adhesive in contact with the first strand to cause the adhesive to spread around the periphery of the first strand.
A contact nozzle for coating at least one elastic strand with an adhesive, a first strand having a periphery with an upper surface and moving in a machine direction, the contact nozzle comprising:
- a nozzle body including a first elongate adhesive chamber for receiving the first strand, said first elongate adhesive chamber including a first chamber surface;
- a first adhesive passage formed in said nozzle body and terminating at a first adhesive orifice in said first chamber surface and adapted to be directed at the upper surface of the first strand to deliver the adhesive into contact with the upper surface of the first strand;
- a first air passage positioned proximate to said first adhesive passage and terminating at a first air orifice positioned downstream from said first adhesive orifice in the machine direction, said first air orifice adapted to be directed toward the upper surface of the first strand and adapted to discharge air at the adhesive in contact with the first strand to cause the adhesive to spread around the periphery of the first strand.
A contact nozzle for coating at least one elastic strand with an adhesive, a first strand having a periphery with an upper surface and moving in a machine direction, the contact nozzle comprising:
- a nozzle body including a front side, a rear side, and a first V-shaped notch for receiving the first strand and extending between said front and rear sides;
- a first adhesive passage formed in said nozzle body and terminating at a first adhesive orifice communicating with said first V-shaped notch and adapted to be directed at the upper surface of the first strand to deliver the adhesive into contact with the upper surface of the first strand;
- a first expansion chamber formed in said nozzle body and communicating with said first adhesive orifice, said first expansion chamber sized to enable die swell of the adhesive exiting said first adhesive orifice;
- and
- a first air passage positioned proximate to said first adhesive passage and terminating at a first air orifice positioned downstream from said first adhesive orifice in the machine direction, said first air orifice adapted to be directed toward the upper surface of the first strand and adapted to discharge air at the adhesive in contact with the first strand to cause the adhesive to spread around the periphery of the first strand.
An adhesive dispensing system for coating at least one elastic strand with an adhesive, a first strand having a periphery with an upper surface and moving in a machine direction, the adhesive dispensing system comprising:
- a module configured to receive a supply of the adhesive;
- a contact nozzle coupled to said module, said contact nozzle comprising:
- a nozzle body including a first slot for receiving the first strand;
- a first adhesive passage formed in said nozzle body and terminating at a first adhesive orifice communicating with said first slot and adapted to be directed at the upper surface of the first strand to deliver the adhesive into contact with the upper surface of the first strand;
- and
- a first air passage positioned proximate to said first adhesive passage and terminating at a first air orifice positioned downstream from said first adhesive orifice in the machine direction, said first air orifice adapted to be directed toward the upper surface of the first strand and adapted to discharge air at the adhesive in contact with the first strand to cause the adhesive to spread around the periphery of the first strand.
A method of contact coating at least one elastic strand with an adhesive, a first strand having a periphery with an upper surface, the method comprising:
- moving the first strand in a machine direction relative to a contact nozzle;
- discharging the adhesive from the contact nozzle onto the upper surface of the first strand;
- and
- discharging pressurized air at the adhesive on the first strand, causing the adhesive to spread around the periphery of the first strand.
Dependencies are inferred from the claim text.