US1956488A - Screen for cotton cleaners - Google Patents

Description

p 1934- J. B. BRENNEN 1,956,488

SCREEN FOR COTTON CLEANERS Filed May 9, 1955 @9000 0000 @0000 00000 0006 OOOOC @0006 0000 OGOOG OOGOC ()OOOQ ()OOOG OOOOG @0000 00006 0000 0006 @0000 OOQOQ ()OOOC Patented Apr. 24, 1934 UNHTED STATES PATENT QFFIQE 1 Claim.

The object of the invention is to provide a screen for cotton cleaners in which the cotton will be retarded when operated upon by the beaters, rather than slid across the screen, as is the case with the conventional cylindrical screen; and to provide a screen construction that will preclude the cotton fibers becoming entangled in the perforations thereby clogging the same.

With this object in view, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawing to which, however, the invention is not to be restricted. The right is reserved to make such changes or alterations practical use may dictate, insofar as such changes or alterations may be comprehended in spirit by the annexed claim.

Figure 1 is a sectional view transverse to the beater shaft of a cotton cleaner and showing a cross-sectional view of the improved screen.

Figure 2 is an enlarged plan view of a section grid type.

When a cotton cleaner is provided with the conventional screen which is of plain cylindrical form, the action of the beater arms 10 causes it to slide over the screen surface and it is not nearly so eiiectively cleaned as if the screen be made of corrugated form, as is the case with the present invention. The corrugations extend longitudinally of the cleaner and thus provide a series of peaks 11 and valleys 12 arranged in intercurrent relation. Thus as the beater arms 10 rotate, the cotton enters the valleys 12 and is preventedby the peaks or ridges 11 from being slid quickly over the screen surface.

The improved screen is perforated for the passage of air, as is the usual screen, but to prevent stoppage or clogging of the perforations, they are formed only in those corrugations constituting the valleys, as indicated at 14, the crown portions of the ridges or peaks being left solid to provide irnperforate zones 15. The perforations in the valleys are formed therein throughout the length of the screen and the imperforate portions of the peaks likewise extend throughout the length of the screen but the width of these imperforate portions is greater than the length of the staple of cotton being operated upon, so that the extremities of the cotton fibers may not enter perforations on opposite sides of the peaks and thus become thereby entangled in the screen. In the valley portions, there is no tendency for the cotton fibers to become entangled in the perforations, the cotton fibers being bent in the valleys soas to tend to direct their extremities inwardly and thus away from the perforations.

In the modified form of the invention shown in Figure 3, a grid construction is employed but this also has the longitudinal corrugations defining the successive ridges and valleys 11 and 12 which function in the same way, as the structure shown in Figure 1, to prevent too free movement of the cotton over the screen in the cleaning operation. It is unnecessary in this form, however, to have the peak or ridge portions blind, as in the form of Figure 1, the depth of the grid being greater than the staple operated upon, so that there is no tendency of the cotton fibers to wind around the screen on the ridges of the grid form.

The invention having been described, what is claimed as new and useful is:

A cotton cleaning screen of generally circular form provided with longitudinal corrugations

Images