Provided is a sewing machine including: a pair of feed bars that are incorporated in a cylinder and are each capable of conveying a material by moving to draw elliptical trajectories in side view; an oil seal abutting outer surfaces of the pair of feed bars by surrounding an entire periphery in a direction intersecting a longitudinal direction of the pair of feed bars; and a seal-supporting unit provided on an inner wall of the cylinder and configured to support the oil seal, wherein the pair of feed bars are configured to be movable upward through the opening of the cylinder, the seal-supporting unit includes an upper opening that allows the pair of feed bars to move upward, and the seal-supporting unit is immovable relative to the cylinder when the pair of feed bars move upward through the opening.

Provided is a sewing machine including: a pair of feed bars that are incorporated in a cylinder and are each capable of conveying a material by moving to draw elliptical trajectories in side view; an oil seal abutting outer surfaces of the pair of feed bars by surrounding an entire periphery in a direction intersecting a longitudinal direction of the pair of feed bars; and a seal-supporting unit provided on an inner wall of the cylinder and configured to support the oil seal, wherein the pair of feed bars are configured to be movable upward through the opening of the cylinder, the seal-supporting unit includes an upper opening that allows the pair of feed bars to move upward, and the seal-supporting unit is immovable relative to the cylinder when the pair of feed bars move upward through the opening.

Provided is a sewing machine including: a pair of feed bars that are incorporated in a cylinder and are each capable of conveying a material by moving to draw elliptical trajectories in side view; an oil seal abutting outer surfaces of the pair of feed bars by surrounding an entire periphery in a direction intersecting a longitudinal direction of the pair of feed bars; and a seal-supporting unit provided on an inner wall of the cylinder and configured to support the oil seal, wherein the pair of feed bars are configured to be movable upward through the opening of the cylinder, the seal-supporting unit includes an upper opening that allows the pair of feed bars to move upward, and the seal-supporting unit is immovable relative to the cylinder when the pair of feed bars move upward through the opening.

Provided is a sewing machine including: a pair of feed bars that are incorporated in a cylinder and are each capable of conveying a material by moving to draw elliptical trajectories in side view; an oil seal abutting outer surfaces of the pair of feed bars by surrounding an entire periphery in a direction intersecting a longitudinal direction of the pair of feed bars; and a seal-supporting unit provided on an inner wall of the cylinder and configured to support the oil seal, wherein the pair of feed bars are configured to be movable upward through the opening of the cylinder, the seal-supporting unit includes an upper opening that allows the pair of feed bars to move upward, and the seal-supporting unit is immovable relative to the cylinder when the pair of feed bars move upward through the opening.

A robotic sewing assembly is provided and includes a sewing head body, an upper arm, a motor and a lower arm. The upper arm is attachable to the sewing head body and includes a sewing needle oriented along a first axis. The lower arm is rotatably attachable to the sewing head body to be rotatable about a second axis defined transversely with respect to the first axis by the motor. The lower arm includes a stitch plate, a butterfly looper and first and second drivetrains. The first drivetrain is extendable through the lower arm and configured to maintain a position of the stitch plate during lower arm rotation. The second drivetrain is extendable through the lower arm and configured to drive the butterfly looper during the lower arm rotation.

A robotic sewing assembly is provided and includes a sewing head body, an upper arm, a motor and a lower arm. The upper arm is attachable to the sewing head body and includes a sewing needle oriented along a first axis. The lower arm is rotatably attachable to the sewing head body to be rotatable about a second axis defined transversely with respect to the first axis by the motor. The lower arm includes a stitch plate, a butterfly looper and first and second drivetrains. The first drivetrain is extendable through the lower arm and configured to maintain a position of the stitch plate during lower arm rotation. The second drivetrain is extendable through the lower arm and configured to drive the butterfly looper during the lower arm rotation.

A robotic sewing assembly is provided and includes a sewing head body, an upper arm, a motor and a lower arm. The upper arm is attachable to the sewing head body and includes a sewing needle oriented along a first axis. The lower arm is rotatably attachable to the sewing head body to be rotatable about a second axis defined transversely with respect to the first axis by the motor. The lower arm includes a stitch plate, a butterfly looper and first and second drivetrains. The first drivetrain is extendable through the lower arm and configured to maintain a position of the stitch plate during lower arm rotation. The second drivetrain is extendable through the lower arm and configured to drive the butterfly looper during the lower arm rotation.

A robotic sewing assembly is provided and includes a sewing head body, an upper arm, a motor and a lower arm. The upper arm is attachable to the sewing head body and includes a sewing needle oriented along a first axis. The lower arm is rotatably attachable to the sewing head body to be rotatable about a second axis defined transversely with respect to the first axis by the motor. The lower arm includes a stitch plate, a butterfly looper and first and second drivetrains. The first drivetrain is extendable through the lower arm and configured to maintain a position of the stitch plate during lower arm rotation. The second drivetrain is extendable through the lower arm and configured to drive the butterfly looper during the lower arm rotation.