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US 2012/0222599 A1Published application
Active thread feed mechanism for a sewing machine
AssigneeBrother International Corporation
InventorThomas Andrew Payne
Life of this patent
Estimating the term…
Abstract
A thread feeding mechanism for actively feeding embroidery thread out of a cartridge through a hollow needle, such that a thread break at or near the needle tip is automatically overcome through normal operation.
Claims27
A thread feeding mechanism comprising:
- an injector needle;
- a fixed cartridge portion;
- a thread control lever adapted to engage at least one thread lock;
- a rack slider positioned in said cartridge to be placed in operative connection with a needle drive mechanism;
- a thread feed body connected to the injector needle and configured to receive a thread;
- a presser foot in operative connection with the rack slider and at least one spring mechanism including an opening for the injector needle;
- and
- at least one thread lock configured to lock a thread during downward motion of the needle;
- whereby the thread feeding mechanism is configured to allow the needle to be driven during a needling operation without moving the fixed cartridge.
6 more elements
A needlework method comprising:
- a) feeding thread to an injector needle;
- b) constraining the thread above a workpiece such that the thread and needle advance together to deliver a stitch to the workpiece on a downward stroke;
- c) constraining the thread above the workpiece such that the thread is stationary during an upward stroke of the needle;
- and
- d) repeating steps a) through c).
2 more elements
Dependencies are inferred from the claim text.