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US 11,787,123 B2Granted
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.
Claims19
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, and wherein portions of the contact surface of the weld tool surrounding the pins are inwardly chamfered;
- at least partially penetrating both the top and bottom headgear straps with the plurality of pins;
- and
- applying high-frequency energy to the weld region through the plurality of pins.
1 more element
Dependencies are inferred from the claim text.