High-frequency welding for headgear
AssigneeFisher & Paykel Healthcare Limited
InventorsMark Arvind McLaren, Andrew James Webb
Life of this patent
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Abstract
Welded headgear sections can be produced by using a weld tool having pins protruding from a weld region contact surface to deliver high-frequency electromagnetic energy to a weld region defined by overlapping top and bottom headgear straps. The pins fully penetrate the top strap and at least partially penetrate the bottom strap. The pins concentrate the electromagnetic energy to achieve a weld joint of acceptable weld strength and aesthetic appeal.
Claims23
A method of producing headgear for a patient interface, comprising:
- using a weld tool to apply high-frequency energy to a weld region defined by overlapping top and bottom headgear straps, each of the top and bottom headgear straps being constructed of a fabric and foam composite material having a pair of outer fabric layers sandwiching an inner foam layer, the weld tool comprising a plurality of pins that at least partially penetrate both the top and bottom headgear straps;
- wherein the plurality of pins include a set of first pins having a first diameter and a set of second pins having a second diameter, the first diameter being different than the second diameter;
- and
- wherein the plurality of pins include at least a first pair of pins and second pair of pins, the first pair of pins are separated by a first distance, the second pair of pins are separated by a second distance, the first distance is different than the second distance.
A method of producing headgear for a patient interface, comprising:
- applying pressure to a weld region defined by overlapping top and bottom headgear straps with a contact surface of a weld tool, wherein the contact surface is separate from a plurality of pins of the weld tool, wherein the plurality of pins conducts electrical or electromagnetic energy;
- wherein the plurality of pins include a set of first pins having a first diameter and set of second pins having a second diameter, the first diameter being different from the second diameter.
A method of producing headgear for a patient interface, comprising:
- applying pressure to a weld region defined by overlapping top and bottom headgear straps with a contact surface of a weld tool, wherein the contact surface is separate from a plurality of pins of the weld tool, wherein the plurality of pins conducts electrical or electromagnetic energy;
- wherein the plurality of pins include a first pair of pins and a second pair of pins, the first pair of pins are separated by a first distance, the second pair of pins are separated by a second distance, the first distance is different than the second distance.
Dependencies are inferred from the claim text.