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A sewing machine presser foot. A presser foot is an attachment used with sewing machines to hold fabric flat as it is fed through the machine and stitched. Sewing machines have feed dogs in the bed of the machine to provide traction and move the fabric as it is fed through the machine, while the sewer provides extra support for the fabric by guiding it with one hand.
The buttonholer's adaptor attaches to the machine's presser bar, replacing the presser foot. In its place the buttonholer employs a cloth clamp with teeth on the underside to hold the material firmly whilst manipulating the cloth side to side and forwards and backwards.
A walking foot replaces the stationary presser foot with one that moves along with whatever other feed mechanisms the machine already has. As the walking foot moves, it shifts the workpiece along with it. It is most useful for sewing heavy materials where needle feed is mechanically inadequate, for spongy or cushioned materials where lifting ...
A set of feed dogs typically resembles two or three short, thin metal bars, crosscut with diagonal teeth, which move both front to back and up and down in slots in a sewing machine's needle plate: front to back to advance fabric gripped between the dogs and the presser foot toward the needle, and up and down to recess at the end of their stroke, release the fabric, and remain recessed while ...
While Davis called this mechanism their "Vertical Feed", sewing machines with similar mechanisms are now known as "walking foot" machines. Closeup of the vertical feed mechanism on an 1877 Davis sewing machine. Later Davis machines used a more conventional feed mechanism, with a stationary presser foot and feed dogs.
Walking foot. A walking foot is a mechanism for feeding the workpiece through a sewing machine as it is being stitched. It is most useful for sewing heavy materials where needle feed is mechanically inadequate, for spongy or cushioned materials where lifting the foot out of contact with the material helps in the feeding action, and for sewing many layers together where a drop feed will cause ...