Winding – tensioning – or guiding – Loop forming – By rotatably driven loop collector
Patent
1993-12-02
1996-03-26
Matecki, Katherine
Winding, tensioning, or guiding
Loop forming
By rotatably driven loop collector
242 20, 242 22, B21C 4724, B65H 6300
Patent
active
055014097
ABSTRACT:
All-thread bobbins for use as sources of lower thread or underthread in sewing machines are formed by winding a thread onto a slender rotary spindle which extends across a winding chamber between and into aligned openings of two end walls which flank the chamber and at least one of which is adjustable axially of the spindle to vary the length of bobbins. The rotating spindle draws thread from a spool or from another suitable source of supply. When the bobbin in the chamber is fully grown, the spindle is extracted from the opening of one of the end walls and from the chamber and the distance between the end walls is increased to permit evacuation of the fully grown bobbin, e.g., by gravity. The thread between the source and the evacuated bobbin is engaged by tongs extendable into the chamber through the opening of the one end wall, and the thus engaged portion is looped and maintained in the opening of the one end wall in a position of readiness for engagement by and for winding around the spindle after the latter is again moved across the empty chamber and into the opening of the one end wall to proceed with the making of a next-following bobbin.
REFERENCES:
patent: 1598262 (1926-08-01), Ashworth
patent: 1688058 (1928-10-01), Reed
patent: 2420936 (1947-05-01), Davis
patent: 2780191 (1957-02-01), Philips
patent: 2815178 (1957-12-01), Cone
patent: 2889120 (1959-06-01), Fitzgerald
patent: 2985401 (1961-05-01), Gazet
patent: 4646982 (1987-03-01), Spring
patent: 4828191 (1989-05-01), Ruge et al.
Grabher Bruno
Strasser Heinrich
Casati Carlo AG
Mansen Michael R.
Matecki Katherine
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