Patent ID: 7445177
Filing Date: 2008-11-04
Classification: B65H

Abstract:
1. A bobbin for receiving a yarn reservoir, comprising: a conical winding zone for the yarn, and a standing area for the bobbin, the bobbin being formed as a hollow member and provided with at least one retaining element for fixing the yarn end, a lower, cylindrical standing section and a frustro-conical section associated therewith, wherein the frustro-conical section is constructed in one piece with the winding zone such that the conical winding zone passes through a base circle having a smaller radius of the frustro-conical section and penetrates at least partly into an interior portion of the frustro-conical section, wherein the cylindrical standing section is axially displaceable relative to the frustro-conical section such that on contact of the cylindrical standing section with the frustro-conical section, the retaining element for fixing the yarn end is formed, and wherein an inside diameter (d1) of the cylindrical standing section is greater than an inside diameter (d2) of a base circle having the larger radius of the frustro-conical section, a radially inwardly directed ring element being provided on a foot side of the frustro-conical section and the cylindrical standing section being provided with a guide element at an end thereof pointing towards the frustro-conical section which retains the ring element axially displaceably in a force- and/or form-locking fashion.