Method and system for manufacturing a barbed suture
AssigneeEthicon, Inc.
InventorsFrank Cichocki, Duru Han, Robert Scogna
Life of this patent
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Abstract
A method for manufacturing a monofilament barbed suture. The method includes positioning a mandrel device adjacent to a rotary mount on which a razor is mounted, the mandrel device comprising a mandrel mounted to a fixture, a filament in contact with a curved surface of the mandrel; and rotating the razor with the rotary mount so that an edge of the razor impinges upon an exterior surface of the filament to impart a linear cut to the filament to a cut depth within the filament to form a barb. The mandrel has a diameter of 4 millimeters or less.
Claims14
A system for manufacturing a monofilament barbed suture, comprising:
- a rotary mount configured to rotate about a central axis;
- a razor mounted to the rotary mount;
- and
- a mandrel device positioned adjacent to the rotary mount, the mandrel device comprising a mandrel mounted to a fixture, the mandrel configured to support a filament on a curved surface of the mandrel so that, as the razor rotates with the rotary mount, an edge of the razor impinges upon an exterior surface of the filament to impart a linear cut to the filament to a cut depth within the filament to form a barb,
- a filament control system to which a first end of the filament upstream from the mandrel and a second end of the filament downstream from the mandrel are coupled,
- wherein the filament control system is configured to pull the first end of the filament and the second end of the filament to provide axial tension to the filament,
- wherein the axial tension brings the filament into contact with the curved surface of the mandrel;
- and
- wherein the mandrel comprises a diameter of 4 millimeters or less.
A system for manufacturing a monofilament barbed suture, comprising:
- a rotary mount configured to rotate about a central axis;
- a razor mounted to the rotary mount;
- a mandrel device positioned adjacent to the rotary mount, the mandrel device comprising a mandrel mounted to a fixture, the mandrel configured to support a filament on a curved surface of the mandrel so that, as the razor rotates with the rotary mount, an edge of the razor impinges upon an exterior surface of the filament to impart a linear cut to the filament to a cut depth within the filament to form a barb, wherein the mandrel comprises a diameter of 4 millimeters or less;
- and
- a mechanical barb lifter mounted to the rotary mount,
- wherein the barb lifter is configured to rotate with the rotary mount to impinge upon a cut side of the barb to increase a height of the barb relative to the filament, and
- wherein the barb lifter impinging upon the cut side of the barb plastically deforms the barb so that the height of the barb is maintained.
A system for manufacturing a monofilament barbed suture, comprising:
- a rotary mount configured to rotate about a central axis;
- a razor mounted to the rotary mount;
- a mandrel device positioned adjacent to the rotary mount, the mandrel device comprising a mandrel mounted to a fixture, the mandrel configured to support a filament on a curved surface of the mandrel so that, as the razor rotates with the rotary mount, an edge of the razor impinges upon an exterior surface of the filament to impart a linear cut to the filament to a cut depth within the filament to form a barb, wherein the mandrel comprises a diameter of 4 millimeters or less;
- and
- a heat source configured to provide a set temperature to a cut barb for a set duration to cause the barb to deflect radially outwards to increase a height of the barb relative to the filament.
Dependencies are inferred from the claim text.