Wm. R. Stewart & Sons (hacklemakers) Limited

William R. Stewart & Sons Ltd.

William R Stewart

David B Stewart

John M Dickinson

A pinned opening roller for an open end spinning machine wherein the pinning pattern around the circumferential surface of the roller is provided by spaced pairs of rows of pins which may extend parallel to the rotational axis of the roller, the spacing between the pairs of rows being greater than the spacing between the rows in each pair and in any pair, the pins in one row being staggered relative to those in the other row. Preferably, for a 71/2' circumference roller approximately 1' wide the pins in each row are spaced 0.1' apart and the rows in a pair are 0.03' apart and there are 28 pairs of rows around the circumference. Preferably, the pins in one row of a pair are each spaced equidistant from their adjacent pins in the other row and the pins in the first row of each pair are helically arranged and those in the second row of each pair also extend helically around the circumference of the roller.

Opening roller for open end spinning machines

A cleaning system for use with a fibre opening device used in connection with the spinning of fibres into yarns wherein an opening roller is mounted for rotation in a housing incorporating a trash separation zone and a fibre stripping zone and the roller has a cylindrical working surface with combing elements projecting thereform, wherein the roller is substantially hollow and has holes in the cylindrical wall defining its working surface to permit flow of air through the wall and the interior of the roller is divided into two or more compartments, and means are provided to remove air and entrained dust and trash from a compartment adjacent to the trash separation zone, and further means are provided to insert air or other gas into a compartment adjacent the fibre stripping zone.

Fiber opening devices

An opening roller assembly for open end spinning machines wherein the roller is releasably and slidably supported on a drive shaft of the open end spinning machine to enable easy removal of the roller for refurbishing, replacement or repair. Non-mechanical means is provided to maintain the roller in an operative position on the drive shaft. Such means may comprise magnetic or fluid pressure means, or gravity. When in its operative position on the shaft, mechanical drive means extending directly or indirectly between the drive shaft and the roller will automatically become engaged. These drive means may be provided by a drive pin or mating engaging surfaces, for example.

Opening roller assemblies for open end spinning machines

An opening roller for an open end spinning machine which may be formed in one or two parts, the opening roller having a central body or hub (1) preferably provided with a central cylindrical aperture (10) therein for mounting on a drive shaft of an open end spinning machine, there being an outer ring (2) having a cylindrical external surface (7), the ring (2) supporting suitable combing elements in the form of spaced pins (14) or card wire and wherein the ring (2) is spaced from and connected to the central body (1) by means of septal walls (3) which may either extend radially or be inclined to respective radial planes passing through them, and wherein the spaces between the septal walls may be filled with a suitable plastics medium (11) which may surround the pin tails (18) if these project from the rear face (19) of the ring (2). The roller may be machined from a one-piece extrusion (FIG. 2) or after suitable machining may be assembled from two parts which may themselves be extruded.

A lag or stave assembly for a Kirschner beater which replaces the traditional one-piece wooden lags and is preferably formed from extruded aluminium. The lag assembly is formed in two parts with a first support part which is preferably channel-shaped and can be secured to the free end of an arm or spider of the beater, and a second pinned working part removably secured along its leading and trailing edges to the upper ends of the arms of the support part, one edge, preferably the leading edge, of the working part being secured to the support part removably and hingedly, e.g. by a hook-shaped tongue engaging in a mating groove, and the other edge being fixedly secured to the other arm of the support part, e.g. by means of screws and/or any type of snap-fit or interlock. The arrangement preferably ensures that one of the parts is loaded in tension or compression when the two parts are secured together to prevent rattling.

Lag or stave assembly for Kirschner beaters

An opening roller for an open-end spinning machine carries an array of pins on its external surface. The pins are arranged in repeating patterns, each pattern comprising from 7 to 12 axially extending rows of equally-spaced pins, the relative dispositions of the pins in adjacent rows being such that the pins lie on lines parallel to a helix which passes through points in the first lines of two adjacent patterns, which points are axially off-set by three times the axial spacing of the pins in 7- or 8-row patterns, four times the axial spacing of the pins in 9- or 10-row patterns or five times the axial spacing of the pins in 11- or 12-row patterns. This arrangement reduces the risk of entanglement of fibres combed by one pin with fibres combed by an adjacent pin in the next row and reduces the tendency of the pins to direct fibres axially along the roller. An open-end spinning machine incorporating the roller is also disclosed.

Growing community of inventors

Craigmount, United Kingdom

William R Stewart