| 摘要 |
A sewing machine has a frame formed of a base, a column, a lower free arm having an upper working surface, an upper arm and a head. A material supporting means in the shape of a retractable shelf is connected to the base by a set of articulated parts, this shelf being displaceable in a vertical direction between an operative level in which it fits around the lower free arm at the working surface thereof, and a retracted level below the lower free arm to allow access thereto. Flaps are hinged to this shelf and can be folded against the frame to form a case therewith or can be folded down to allow access to the machine for operation thereof.
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