A sewing machine includes a material sandwiching unit to sandwich two materials having annular edges from above and below while they are stacked so that the material on an inner wheel side is located on the lower side and the material on an outer wheel side is located on the upper side, wherein a part of the material sandwiching unit located above the two materials is vertically movable, the material sandwiching unit includes a curl-removing mechanism to straighten curls occurring on the edges of the two materials, the material sandwiching unit includes inclined parts that serve as the curl-removing mechanism and have edges extending backward from a farther side of the edges toward the edge side at a position where the two materials pass therethrough, and the inclined parts have air ejectors to eject air so as to form airflows that straighten portions of the materials where curls have occurred.

Provided is a sewing machine including: a fabric folding device that includes a guide member that is movable relative to the fabric and a stationary member that is located adjacent to the guide member; and a retraction detection member that is located on a front side of the guide member and includes a pair of electric contacts that enable electric conduction by contacting with each other, the retraction detection member being configured to switch the operational state of the pair of electric contacts by abutment of a start point of a hemming seam with the retraction detection member in association with movement of the fabric in sewing the fabric. The guide member is moved by switching the operational state of the pair of electric contacts so as to retract from a path of the start point moved along with movement of the fabric.

Provided is a sewing machine including: a fabric folding device that includes a guide member that is movable relative to the fabric and a stationary member that is located adjacent to the guide member; and a retraction detection member that is located on a front side of the guide member and includes a pair of electric contacts that enable electric conduction by contacting with each other, the retraction detection member being configured to switch the operational state of the pair of electric contacts by abutment of a start point of a hemming seam with the retraction detection member in association with movement of the fabric in sewing the fabric. The guide member is moved by switching the operational state of the pair of electric contacts so as to retract from a path of the start point moved along with movement of the fabric.

An anti-puckering apparatus for forming, on a work piece, a line of stitching substantially free from puckering is disclosed. The apparatus includes a removable base which is added to a sewing machine bed surface proximate to a needle and a stitch formation zone. The apparatus also includes a carrier mounted on, and moveable relative to, the base and an endless row of flexible filamentary elements carried by the carrier. The carrier progressively moves subsets of filamentary elements into and out of a stitch formation zone during the formation of a line of stitching. The filamentary elements are presented across a stitch formation zone in advance of an intended line of stitching at an oblique angle relative to a sewing machine bed surface.

A fabric clamp that passes under the presser foot of a sewing machine is provided. The clamp has a loop of resilient strip folded over upon itself, an upper slotted lever, and a lower slotted lever. The resilient strip has an upper portion, the terminus of which defines an upper planar jaw, and a generally planar lower portion, the terminus of which defines a lower planar tongue, joined by a curvilinear central portion. The upper portion of the resilient strip passes through the upper lever. The lower portion of the resilient strip passes through the lower lever. The total transverse width of the portions of the tongue is no more than about 12 mm. The curvilinear portion urges the jaw and tongue together. When the upper jaw and the tongue are adjacent and the levers are urged together, the jaw and the tongue are displaced from adjacent deployment.

A seam allowance guide aide system including a needle plate of a sewing machine containing vertical and horizontal lines with colors; a vertical line is provided to be aligned with the needle default position on the sewing machine. Colors are used to represent a standard measurement known and accepted in the sewing industry. The seam allowance guide aide is fixed and non-removable to said needle plate.

A seam allowance guide aide system including a needle plate of a sewing machine containing vertical and horizontal lines with colors; a vertical line is provided to be aligned with the needle default position on the sewing machine. Colors are used to represent a standard measurement known and accepted in the sewing industry. The seam allowance guide aide is fixed and non-removable to said needle plate.

A mat structure for a vehicle, in which an edging member capable of preventing impurities such as soil from falling down to an indoor floor of the vehicle is sewed on an upper surface of an edge of a mat, and a sewing device capable of easily sewing the edging member and a magic tape on the mat. The mat prevents impurities remaining on the upper mat from falling down to the indoor floor of the vehicle and contaminating inside the vehicle by using the protrusion portion, and passengers may scrape the impurities off bottoms of the passenger's shoes on the protrusion portion so that the impurities remain on the upper mat. Also, the protrusion portion protects a sewing line of the female magic tape against frictions with the bottoms of the shoes, and prevents the sewing line from being torn off.

A mat structure for a vehicle, in which an edging member capable of preventing impurities such as soil from falling down to an indoor floor of the vehicle is sewed on an upper surface of an edge of a mat, and a sewing device capable of easily sewing the edging member and a magic tape on the mat. The mat prevents impurities remaining on the upper mat from falling down to the indoor floor of the vehicle and contaminating inside the vehicle by using the protrusion portion, and passengers may scrape the impurities off bottoms of the passenger's shoes on the protrusion portion so that the impurities remain on the upper mat. Also, the protrusion portion protects a sewing line of the female magic tape against frictions with the bottoms of the shoes, and prevents the sewing line from being torn off.

Provided is a sewing machine including: a cylinder unit 3 configured to support two materials Fi and Fo having annular edges by being inserted therethrough while they are stacked, with one being located on the inner wheel side and the other being located on the outer wheel side; a stitch plate 12 configured to support the material Fi on the inner wheel side supported by the cylinder unit 3 by abutting it from below; a material presser 13 configured to press the material Fo on the outer wheel side supported by the cylinder unit 3 above the stitch plate 12; and a material sandwiching unit 41 provided on the near side of the stitch plate 12 and the material presser 13 and configured to sandwich, from above and below, the two materials Fi and Fo stacked, with the material Fi on the inner wheel side being located on the lower side and the material Fo on the outer wheel side being located on the upper side.