Thread end holder for sewing machine with thread winding bobbin
AssigneeSSMC Inc.
InventorsRobert H. Larsen, Jan Szostak
Life of this patent
Estimating the term…
Abstract
A needle thread end holder for a sewing machine having bobbin thread replenishing mechanism in which an annular groove formed in the presser securing screw accomodates a stretched rubber "O" ring so as to apply only a limited frictional resistance to a thread introduced beneath the "O" ring insufficient to abort a bobbin thread replenishing operation.
Claims4
A needle thread end holder for a sewing machine having a presser foot supporting presser bar, a presser foot securing thumb screw carried by said presser bar, said presser foot securing thumb screw formed with an annular groove, and a flexible "O" ring accommodated in stretched condition in said annular groove and adapted to apply a limited frictional resistance to a thread introduced into said annular groove beneath said "O" ring.
A needle thread end holder for a sewing machine having a bobbin thread replenishing mechanism with a bobbin rotating drive including a friction clutch device, a needle thread end holder for gripping the needle thread end during initiation of bobbin thread replenishment, said thread end holder comprising a presser foot securing thumb screw supported on said sewing machine and formed with an annular groove, a flexible "O" ring accommodated in stretched condition in said annular groove to apply frictional resistance to a needle thread end introduced into said annular groove beneath said "O" ring less than that necessary to overcome said friction clutch device in said bobbin rotating drive.
Dependencies are inferred from the claim text.