US 3038216 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
June 12, 1962 w. NAEGELI 3,038,216
FEED TABLE FOR SLIVERS Filed Jan. 18, 1961 IN V EN TOR. WSR/VEB VQ EGEL United States Patent 3,038,216 FEED TABLE FOR SLIVERS Werner Naegeli, Winterthur, Switzerland, assigner to Actiengesellschaft Joh. Jacob Bieter 8; Cie, Winterthur, Switzerland, a corporation of Switzerland Filed Jan. 18, 1961, Ser. No. 83,430 Claims priority, application Switzerland Jan. 2S, 1960 4 Claims. (Cl. l9-288) The present invention relates to la feed table for slivers as used in combination wi-th preparatory spinning machines to which a plurality of slivers 4are simultaneously fed.
When high speed drawing frames are fed from large cans and the slivers are individually guided and must be pulled a long way `on the feed table by the feed rollers of the drafting arrangement, breakage of the slivers occurs quite frequently. The cohesion, particularly of combed slivers, is not good enough to resist the sum of friction effects caused by the gliding `of the slivers on the feed table and faulty drawing or even breakages are unavoidable.
It is an object of the present invention to provide a feed table for slivers travelling from cans to a drafting arrangement which feed table is so designed as to substantially reduce the frictional resistance so that the tension of the slivers is considerably smaller than in conventional arrangements of this type. According to the invention the surface of the table supporting the slivers is laterally and downwardly slanted whereby the slivers are not only supported by the slanted table surface but each sliver is also supported by a sliver which is placed next to and laterally below the sliver which is already moving on the slanted surface. Due to the slanted table surface a gravity component of th-e slivers causes moving ltogether and cohering of the slivers so that weak portions of one sliver are Iassisted by the adjacent slivers and cannot cause faulty drafting or breakages.
The novel features which are considered characteristic of the invention are set forth with particularity in the appended claims. The invention itself, however, and additional objects and advantages thereof Will best be understood from the following description of an embodiment thereof when read in connection with the accompanying drawing the one FIGURE of which is a perspective view of a feed table according to the invention.
Referring more particularly to the drawing, numeral 1 designates supports of a feed table 2 for feeding slivers to a drafting arrangement 3 having a cover 3. The table has l'a horizontal top portion and laterally declining or downwardly `slanted lateral surface portions 4 whose width increases toward the drafting arrangement. Pairs of superimposed feed rollers 5 are mounted on the lower marginal portion of the slanted lateral portions 4. The lower feed roller of each pair is driven in the conventional manner. The upper feed roller of each pair is swingably supported land rests on a sliver 7. Each roller pair clamps a sliver, pulling it out of a can 6 and laying the sliver on the inclined surface portion 4 of the feed table slightly above the lower edge 8 of the inclined portion 4. In the neighborhood of each pair of feed rollers and at the end of the feed table which is next to the drafting arrangement 3, a guide 9 is mounted on the slanted portion of the feed table. Each guide 9 presses a sliver received from the last feed roller pair preceding the guide against a sliver which has already been laid on the feed table by the second last preceding feed roller pair. Since the slivers previously laid on the feed table rest on the last incoming sliver the slivers are united and travel as a unit toward the drafting arrangement 3. The end of the feed table facing the drafting arrangements which pull the slivers along the table, is provided with a surface l@ declining toward the drafting arrangements. The surface l@ intersects the surface 4, forming a downwardly slanted edge 11 extending in forward and outward direction.
The edge 1l has a flattening effect on the slivers and forms a web suitable for being fed into the drafting arrangement.
Experience has shown that an inclination of the inclined table surfaces of between 5 and 20 with respect to a horizontal plane is sucient to produce the desired effect when yfeeding any of the usual sliver materials to a drafting arrangement.
l. An oblong feed table for feeding slivers to preparatory spinning machines, such as drafting arrangements, comprising a laterally declining surface portion having a lower longitudinal marginal portion, and a plurality of guide means placed in said marginal portion and spaced longitudinally of said feed table for individually laying slivers in juxtaposed position on said surface portion.
2. An oblong feed table as defined in claim 1 wherein said surface portion is plane and the angle of inclination of said surface portion with respect to a horizontal plane is between 5 and 20.
3. An oblong feed table as defined in claim 1 wherein the width of said surface portion increases toward the drafting arrangements for accommodating the increasing number of slivers.
4. An oblong feed table as defined in claim l comprising a downwardly and forwardly slanted surface portion at the end of the feed table facing the drafting arrangements, said slanted surface portion forming an edge with the laterally declining surface portion.
References Cited in the file of this patent FOREIGN PATENTS