US2562998A - Composite card flat - Google Patents

Description

Patented Aug. 7, 1951 UNITED STATES PATENT OFFICE COMPOSITE CARD FLAT Application May 29, 1948, Serial No. 30,133

1 Claim. 1

This invention relates to card flats as used in revolving flat carding machines. Such flats support portions of card clothing which coact with the rotating carding cylinder. The flats are of very substantial length, and unusual strength and rigidity is necessary for their successful operation.

It is the object of my present invention to provide a composite card fiat in which these qualifications are exceptionally well attained. To the accomplishment of this general object, I provide a card flat having a strong and rigid structural steel body portion and having separately formed and attached end portions which provide the required bearing and guiding surfaces.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a partial plan view of a composite card flat embodying my invention;

Fig. 2 is a side elevation thereof, with certain parts shown in section;

Fig. 3 is an end view, looking in the direction of the arrow 3 in Fig. 2; and

Fig. 4 is a transverse sectional elevation, taken along the line 4-4 in Fig. 2.

Referring to the drawings, my improved card flat comprises a structural steel body portion H] which is preferably of the commercial T section shown in Fig. 4. Separately formed end portions or seats I2 are secured to the two ends of the body portion l0, and the card clothing C may be attached to the top surface I4 01 the body member I!) in any convenient manner, as by clamping strips l5 (Fig. 3).

The end portions or seats I2 may conveniently be cast or molded from sintered or powdered metal and are preferably of more or less porous construction, so that they may be impregnated with a suitable oil or other lubricant.

Curved guiding surfaces IE on the seats 12 engage corresponding flxed surfaces in the carding machine and guide the flats in their desired spaced relation to the carding cylinder. Studs I8 2 are provided for attaching the flats to suitable transporting chains.

The end of the upright middle flange Illa of the steel body member In is preferably cut away as indicated at 20 in Fig. 2, and each end portion or seat I2 is secured to its body portion In by welding or brazing along the surfaces 20, 2| and 22 (Fig. 2). A firm and secure assembly of the three parts of each card flat is thus attained.

The structural steel body portion I0 is of much more firm and rigid construction than the cast iron construction previously commonly used, and the end portions or seats [2 may be economically formed and may be made of the metal which is best adapted to their intended purposes.

In case one of the seats I2 is broken or otherwise damaged, it may be removed and replaced, whereas with the previous construction the entire flat had to be discarded.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is:

A composite card flat comprising a structural steel T-bar and pro-formed end seating members rigidly and permanently secured to the ends of said T-bar, the end portions of the middle flange of said T-bar being entirely cut away to provide fiat seating surfaces for said end members, and said end members being secured in abutting relation to said fiat surfaces and to the transverse end faces of said T-bar and said middle flange.

FREDERIC E. BANFIELD, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,097,254 Platt Oct. 26, 1937 2,496,765 Williams Feb. '7, 1950 FOREIGN PATENTS Number Country Date 11,924 Great Britain of 1894

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