Spinning frame, preferably ring spinning frame

Details Spinning frame, preferably ring spinning frame Spinning frame, preferably ring spinning frame

1982-01-12

1984-09-11

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

With drafting

19243, 19244, 19246, 19288, D01H 526

Patent

active

044702531

DESCRIPTION:

BRIEF SUMMARY
The present invention is directed to spinning frames of the type having main drafting means through which two fiber bands move in spaced parallel relation for subsequent twisting by suitable twisting means wherein one of the entrance rollers of the main drafting means over which an endless leather tape passes is provided with a pair of axially spaced apart parallel annular ring slots.
The uniformity of the yarn produced by such spinning frames often leaves a lot to be desired. It is therefore a task of the invention to improve the uniformity of yarn produced on such spinning frames.
As a consequence of the two ring slots of the upper roller located on the entry side of the main drafting zone and encompassed by an upper apron, the length of the main drafting zone of the drawing system can be adjusted to somewhat less than the length of the longest fiber of the fiber bands without any danger of ripping the fiber; thereby the drafting work of the drawing system and thus the uniformity of the yarn produced from both fiber bands by means of their being twisted together can be improved. The fiber band guides of the drawing system ensure a precise feed of the fiber bands through the drawing system into the position necessary for the two ring slots of the upper roller.
Despite the two ring slots of the upper roller of the entry roller pair of the main drafting zone, the two fiber bands are sufficiently clamped on their way through this pair of entry rollers to enable the main drafting--and in the case where there is a pre-drafting zone, also the pre-drafting--to be precisely carried out. Practically speaking, only the relatively low proportion of fibers which are longer than the main drafting zone distance are pulled through the clamping surface of the entry roller pair more rapidly than the transport speed of the entry roller pair of the main drafting zone, without tearing these long fibers thanks to the ring slots of the upper entry roller. The width of both ring slots of the upper roller of the entry roller pair of the main drafting zone can easily be designed such that fiber bands of varying fiber composition and differing numbers can be drawn. In general it is efficient to arrange things such that the width of each of the two ring slots of this upper roller roughly corresponds to the width of the fiber band under it in the clamping gap of this entry roller pair of the main drafting zone. If fiber bands of widely differing numbers are to be spun on the spinning frame, one can adjust the width of the ring slots of this upper roller according to the width of the fiber bands to be processed on the machine and the maximum weight/length unit. In such a case it is also possible to have two or more sets of upper entry rollers of main drafting zone with ring slots of various widths, which correspond to the various number areas of the fiber bands to be processed, and which can also be interchanged if necessary.
The upper apron ca correspond to the usual drawing systems, particularly those of traditional worsted yarn spinning frames, and the upper roller it encompasses can have a normal elastic covering in which, however, ring slots are located. It is preferable that the main drafting zone also have a lower leather tape. For spinning frames with pre-drafting zones, two fiber band guides can also be advantageous in the pre-drafting zone, whereby the vertical median lengthwise planes of its fiber band guide channels roughly match the vertical median lengthwise planes of the two ring slots of the upper entry roller of the main drafting zone. The upper entry roller of the main drafting zone can also form the upper exit roller of the pre-drafting zone.
The two fiber band guides of each pair of fiber tape guides can advantageously be connected to each other, for example to form a single-piece double fiber band guide.
The two fiber band guides located in the main drafting zone can best be held merely by placing them on the two fiber bands so that they are carried by same. On the other hand, it is useful to arrange all the fibe

REFERENCES:
patent: 2230399 (1941-02-01), Brandt et al.
patent: 2430611 (1947-11-01), Gwaltney et al.
patent: 2470055 (1949-05-01), Schlums
patent: 2856643 (1958-10-01), Spencer
patent: 3006037 (1961-10-01), Bettolo
patent: 3020697 (1962-02-01), Henry
patent: 3105998 (1963-10-01), Raboisson

Affiliated with

Also associated with

Rating

Spinning frame, preferably ring spinning frame does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spinning frame, preferably ring spinning frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spinning frame, preferably ring spinning frame will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1189120