Sewing apparatus for sewing a curved, wavy cloth

A sewing apparatus, by which a base blank material is sewn, comprising:

• a sewing machine body having a table;
• a stationary plate fixed on said table of said sewing machine body;
• said stationary plate having three guide grooves formed on its upper surface;
• and
• a movable plate slidably mounted on said stationary plate, said movable plate including clamp means for securing said base blank material thereon and three guide rollers rotatably provided at a reverse surface of said movable plate, said three guide rollers being adapted to be slidably fitted on said three guide grooves of said stationary plate, respectively,
• wherein said three guide grooves are each formed in conformity with respective traces which are to be shown by said three guide rollers in order that said movable plate is moved on said stationary plate so as to effect sewing of said base blank material in a sinuous or wavy fashion, and further two of said three guide rollers are each formed with a widened groove whose area is greater than outer diameters of said guide rollers, so that at least two guide rollers are always slidingly moved along their respective guide grooves, to thereby effect stable sewing of said base blank material,
• whereby, by operation of said sewing machine body, said base blank material is sewn in a sinuous or wavy fashion automatically.