CS239227B1 - Sewing machine upper thread bobbin - Google Patents

Abstract

The invention solves a new generation of detachable connection of the upper and shuttle bobbins of domestic sewing machines. The essence is the modification of one end of the small-winding bobbin for the upper threads of sewing machines. The modified end allows the capture of the shuttle bobbin and the ends of both threads.

Description

BACKGROUND OF THE INVENTION The present invention relates to a bobbin thread for sewing machine threads.

Various bobbin designs for sewing machine threads are known in practice. Some of them have differently designed faces to catch the end of the thread. The shuttle coils do not allow the threads to be caught. By joining the two bobbins, the advantage of catching the end of the thread can also be transferred to the shuttle bobbin. The solution according to DOS 2,447,901 allows the coils to be connected, but by means of a third intermediate member.

The essence of the small thread bobbin for the sewing machine upper threads according to the invention consists in that the bobbin is in one piece, and generally one face is adapted to attach the bobbin bobbin and catch the ends of both threads.

The main advantages of the solution according to the invention reside in the arrangement of the stock threads and their search for self-sewing in less than half the time.

The solution according to the invention is shown in the accompanying drawing, wherein Fig. 1 is a front and side view of a variant with outer elastic elements including a connected shuttle coil; Fig. 2 is a front and side view of a variant with inner elastic elements;

The sewing machine thread bobbin 1 of FIG. 1 is provided at one end with at least three symmetrical paired notches 5 which separate the ribs 6 which are provided with resilient elements 2 for attaching the bobbin bobbin 4, the paired notches 5 serving to catch the ends of both threads.

The sewing machine thread bobbin 2 according to FIG. 2 is provided with at least two rectangular openings 8 on the cylindrical part of one face, in which two spring elements 2 are each provided for connecting the shuttle bobbin 4 ', the rectangular openings

239 22j are connected at two corners to two notches 5 for receiving the ends of both threads.

The sewing machine thread bobbin 3 according to FIG. 3 has one face provided with an inner cone 4 for connecting the shuttle bobbin 4 ^and notches 4 for receiving the ends of both threads.

The function of the modified spool front for the sewing machine upper threads is that when the upper and shuttle bobbins are wound outside the sewing machine, the shuttle bobbin 4 is applied to the upper bobbin and is lowered into the modified bobbin by gentle pressure ee. The ends of the threads are inserted into the notches. Before using the threads, both threads and bobbins are detached and inserted into functional positions of the sewing machine.

The design of all said bobbins allows a detachable connection to the shuttle bobbin without a third intermediate spline and the ends of both threads to be caught.

Claims (4)

OBJECT OF THE INVENTION 1. Sewing machine thread bobbin, equipped with shutter spool extensions The sewing machine thread bobbin according to claim 1, characterized in that the spool face (3) is provided with an inner leather hem (9) and notches (5). Sewing machine bobbin according to claim 1, characterized in that the cylindrical part of the bobbin face (2) is provided with at least two rectangular openings (8), in which there are always two spring elements (7), the rectangular openings (8). ) connect two notches in two corners (5) · Sewing machine thread bobbin according to claim 1, characterized in that the spool face (1) is provided with at least three paired notches (5) separating the ribs (6) which are provided with resilient elements (7).