Sewing machine for forming running-stitch seams, with highly regular stitch forming

#The present invention relates to a sewing machine for forming running-stitch seams.

#Sewing machines for forming a seam with a so-called running stitch are known; such seam is formed with a single thread of preset length, known as draw, and is composed of stitches that are alternately visible on either side of the fabric being sewn.

#A machine of this kind is disclosed in U.S. Pat. No. 4,122,787 and is substantially composed of a needle that has a substantially vertical axis and is provided, proximate to its tip, with an open eye and is orientated so that its axis is substantially perpendicular to a supporting surface on which the item being sewn is deposited.

#Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment of the machine according to the invention, illustrated only by way of non-limitative example in the accompanying drawings, wherein:

#FIG. 1 is a front elevation view of some of the elements that compose the machine according to the invention, arranged below the supporting surface of the item being sewn, with the fixed part of the thread take-up wheel shown only partially;

#FIG. 2 is a partially sectional enlarged-scale front elevation view, similar to FIG. 1, of the fixed part of the thread take-up wheel;

#With reference to the figures, the machine according to the invention, shown only partially for the sake of simplicity, comprises in a per se known manner a needle 1 that has, proximate to its tip, an eye 2 that is open at the front and is orientated so that its axis 1a is substantially perpendicular to a supporting surface 3 for the item 4 being sewn.

#The needle 1 can be actuated with a reciprocating motion along its axis 1a, which is preferably orientated vertically, in order to pass cyclically through the supporting surface 3, which is preferably arranged horizontally.

#Below the supporting surface 3 there is a thread take-up wheel, generally designated by the reference numeral 5, which is arranged on a plane that is substantially parallel to the axis 1a of the needle 1 and is orientated so that its axis 5a is substantially perpendicular to the axis 1a of the needle 1.