Device and process to guide, hold and convey a yarn during bobbin replacement
AssigneeSchubert & Salzer Maschinenfabrik Aktiengesellschaft
InventorDietmar Greis
Life of this patent
Estimating the term…
Abstract
In a spinning and winding machine, a continuously fed yarn is wound into a cross-wound bobbin. When a predetermined diameter of the cross-wound bobbin has been reached, the cross-wound bobbin is replaced by an empty bobbin holder. The yarn is moved to a lateral area next to the winding zone. The yarn is guided during all winding and bobbin replacement processes by a microprocessor-controlled step motor, by means of a cross-winding guide.
Claims19
A process for replacing a full bobbin on a spinning and winding machine which has a traversing yarn guide for guiding a continuously fed yarn onto a bobbin holder in a cross-wound pattern, comprising the following steps:
- (a) traversing said yarn guide in a winding zone until said bobbin reaches a predetermined diameter;
- (b) moving said yarn and said yarn guide into a lateral area adjacent to said winding zone when said bobbin reaches said predetermined diameter;
- (c) retaining said yarn and said yarn guide in said lateral area;
- (d) severing said yarn adjacent said winding zone;
- (e) removing said full bobbin and replacing it with an empty bobbin holder;
- (f) moving said yarn and said yarn guide into said winding zone;
- (g) winding said yarn onto said bobbin holder;
- and
- (h) controlling the movements of said yarn guide by a microprocessor-controlled stepping motor.
In a yarn spinning and winding machine, wherein yarn is continuously spun and cross-wound onto a bobbin holder to form a cross-wound bobbin, comprising:
- (a) a traversing yarn guide for guiding said yarn onto said bobbin holder;
- (b) an endless band connected to said traversing yarn guide for traversing said yarn guide;
- a stepping motor for driving said endless band;
- and
- microprocessor control means including means to control said stepping motor to traverse said traversing yarn guide within a yarn winding zone until said bobbin is filled to a predetermined diameter, and to move said traversing yarn guide laterally into a yarn draw-off zone after said bobbin reaches said predetermined diameter.
Dependencies are inferred from the claim text.