US2160703A - Cleaner for carding bar teeth - Google Patents

Description

May 30, 1939. s. c. MA-RKLEY 2,160,703

Gamma FOR CARDING BAR TEETH Filed Jan. 30, 1957 2 Sheets-Sheet 1 y s. c. MARKLEY 2,160,703

CLEANER FOR CARDING BAR TEETH Filed Jan. 50, .1937 2 Sheets-Sheet 2 Patented May 30, 1939 UNITED STATES PATENT OFFICE 6 Claims.

- My invention relates to an improvement in cleaners for carding bar teeth.

The object is to provide means to be applied to any make of tobacco stemmers for absolutely and positively cleaning the carding teeth of any and all tobacco at the end of the stripping action. This invention does away with the requirement for carding teeth or blades on the cleaning rolls, which sometimes tear up the tobacco strips in cleaning the carding teeth. This invention also does away with all jerking of the machine which results from carding teeth becoming loaded with stems or leaves.

While the present invention has been designed for use with the machine set forth in patent to Pasley, No. 1,930,406, of October 10, 1933, it is applicable to all tobacco-stemmers of this general type, and it is intended to be made as a separate unit in order that it may be applied to any and all of these machines.

In the accompanying drawings:

Fig. 1 is a view in elevation and. partly in section of a standard type of stripping machine showing the present invention applied thereto;

Fig. 2 is a fragmentary section on line 2-2 of Fig.

Fig. 3 is an enlarged side view of my improvement on line 3-3 of Fig. 1, showing the endless sprocket-chain in section;

Fig. 4 is a top plan View of the same;

Fig. 5 is a bottom plan view;

Fig. 6 is a longitudinal sectional view;

Fig. 7 is a transverse section on the line 1-4 of Fig. 6, looking in the direction of the arrows;

Fig. 8 is a similar section on the line 88 of Fig. 6, looking in the direction of the arrows; and

Fig.9 is a view of a slightly modified application of the invention as applied to a rotary stripper as distinguished from the endless belt type.

The numeral I represents a bar to the sides of which the stripper card clothing 2 is securely held by the flange 3, the latter being held fast manner.

A pusher or ejector l 0 in the form of a channel embraces the stripper card clothing 2, as shown in Figs. 3, '7 and 8, and the upper surface of this pusher or ejector is provided with transverse slots I! throughout its length which form clearance spaces for the teeth 12 of the stripper card clothing which normally project a predetermined distance th-erethrough; as shown in Figs. 3, 6, 7

and 8, in which position they are preferably held by an I-shaped spring Hi, the ends of which conveniently extend loosely into slots l4 formed therefor in the sides of the pusher or ejector l0.

As is customary, these carding bars are secured to the endless chains 6 at suitable intervals as viewed in Fig. 1, and they are so synchronized that the teeth l2 meet or substantially meet during the stripping operation as shown by two of them in Fig. 1.

On the shafts l5 which drive the sprocketwheels 8 and the endless chain 6, disks it are secured (see Figs. 1 and 2) these being of such diameter and so placed on the shaft I5 that they force the pusher or ejector I0 outwardly over and. for the length of the teeth l2, as shown at the right-hand end of Fig. 1, thereby completely housing the teeth while the chains are around the cams I6.

During their passage around the disks, the outer surface of the pusher l0 and the tip ends of the teeth I2 are met by cleaning rolls ll, of which there is at least one for each stripping member. These cleaning rolls I! are preferably made of leather running longitudinally of the roll, and their function is to clean off any tobacco that might be left on this improved carding bar.

In this way, carding or blades on the cleaning rolls are done away with entirely since in tobacco strippers now in use they sometimes tear up the tobacco strips in cleaning the carding teeth, and my present improvement also does away with all jerking so common with the machines now in use when carding teeth become loaded with stems or leaves.

In the modified construction, an adaptation is shown for the type of machine disclosed in the wellknown Strickland tobacco stemmer as exemplified in U. S. Patent No. 1,301,193, issued April 22, 1919, see Figs. 25 and 26, in which my improvements are applied to a rotary device l8, each of which is mounted on a shaft 2 I, to which the carding bars 22 are attached, and as the shafts turn in the direction, for instance, of the arrows shown in Fig. 9, the ejectors or push-off device 23 traverse the fixed cams 24, and in that way strip the teeth 25. Cleaner brushes 26 are rotatably mounted in position to brush the ejectors as they pass them.

With my invention, the particles of tobacco leaf and stems adhering to the teeth I2 and 25 are removed without any of the attendant objections hitherto mentioned.

I claim:

1. A push-01f or ejector which includes a bar, and a channel-shaped pusher slidably connected therewith, and enclosing the bar on three sides, thereby housing the same, the bar carrying card clothing and the pusher having openings through which the card clothing is adapted to slidably project.

2. A push-ofi or ejector which includes a bar, a channel-shaped pusher slidably connected therewith, and enclosing the bar on three sides, thereby housing the same, the bar carrying card clothing and the pusher having openings through which the card clothing is adapted to slidably project, and means for preventing endwise movement between the bar and the pusher.

3. A push-01f or ejector including a bar carrying card clothing and a pusher embracing the bar on at least three sides and having openings on one side through which the card clothing projects, and a spring supported at its ends in the sides of the pusher and pressing yieldably against the bar at an intermediate point.

4. A push-off or ejector including a bar carrying card clothing and a pusher embracing the bar on at least three sides and having openings on one side through which the card clothing projects, a spring supported at its ends in the sides of the pusher and pressing yieldably against the bar at an intermediate point, the sides or the pusher being slotted, and means extending from the bar into the slots for guiding the relative movement of the bar and pusher and preventing substantial endwise movement of one with respect to the other.

5. The combination of a bar, card clothing supported thereby, flanges secured to the opposite edges of the bar and embracing the opposite edges of the card clothing, whereby to secure the latter throughout its length to the bar, a pusher embracing the flanges and the bar and having openings therein for the teeth of the card clothing and a spring interposed between the bar and the sides of the pusher for exerting pressure upon the bar for holding the latter yieldingly in its normal position.

6. A push-off or ejector including a bar carrying card clothing and a pusher embracing the bar on at least three sides, thereby housing the bar, means for precluding substantial endwise movement between the bar and the pusher, the sidesof the pusher having slots therein and an I-shaped spring, the ends of which extend into the slots in the sides of the pusher, and the center of which bears upon the bar whereby to maintain a normal relationship between bar and pusher.

SAMUEL C. MARKLEY.

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