Sewing apparatus for automatically sewing a cloth having a rectilinear shape to a cloth having a curved shape

A sewing apparatus, by which a rectilinear part of a first base blank material is sewn to a sinuously-cut or wavy part of a second base blank material, 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;
• a movable plate slidably mounted on said stationary plate, said movable plate including clamp means for securing said first base blank material thereon and three guide rollers rotatably provided at a reverse surface of said movable plate, said three guide rollers being slidably fitted in 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 so moved on said stationary plate as to sew said rectilinear part of said first base blank material to said sinuously-cut part of said second base blank material, 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,
• a supplying guide mechanism provided above said movable plate, said supplying guide mechanism being adapted for supplying said first base blank material to a sewing area of said sewing machine body;
• a supportive guide mechanism adapted for supportively guiding and retaining upwardly a free end part of said first base blank material,
• whereby, by operation of said sewing machine body, said rectilinear part of said first base material is sewn to and along said sinuously-cut part of said second base material.