# US 4,398,318 A · Card clothing for carding machine elements

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- Number: US 4,398,318 A
- Document ID: US4398318A
- Status: Granted
- Kind: A
- Application number: 06/259,365
- Filed: 1981-04-30
- Granted: 1983-08-16
- Earliest claimed: 1981-04-30
- Assignees: Ashworth Bros., Inc.
- Inventors: Robert C. Ashworth, III
- Web page: https://patentgrep.com/patent/US4398318A

## CPC

- D01G 15/88: formed from metal sheets or strips
- D01G: PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING (winding or unwinding, conducting or guiding laps, webs, slivers or rovings in general, sliver or roving cans, depositing in sliver or roving cabs B65H; preparation of fibres for paper-making D21)

## Abstract

Metallic wire card clothing for carding elements is provided by a plurality of wire strips disposed side-by-side, as by helically winding at least two strips abutting each other on a supporting roll element, with each strip having an upstanding portion providing a row of teeth extending along the strip and the front edges of the teeth on each strip defining a common acute angle with the axis of the strip on which they are carried. The common acute angle of the teeth in one row is greater than the common acute angle of the teeth in the adjacent row by more than 10 degrees with preferably this difference in angles being at least 20 degrees and the acute angles for the front edges of the teeth relative to the strip axis being in the range of approximately 40 degrees to 90 degrees.

## Claims

### Claim 1

Metallic wire card clothing for rolls and like carding elements comprising:
a plurality of generally flat wire strips disposed side-by-side on a supporting element;
an upstanding portion on each said strip providing a row of flat teeth extending longitudinally of each said strip with each tooth having front and trailing edges converging from the base portion of the strip to define a tooth point;
said front edges of the teeth in each said row defining a common acute angle with the axis of the strip on which they are located; and
said common acute angle of said teeth front edges forming one row being greater than the common acute angle of said teeth front edges forming the adjacent row by a difference of more than 10 degrees.

### Claim 2 (depends on 1)

Metallic wire card clothing as recited in claim 1 wherein said trailing edges of the teeth in each said row define a common back angle with the axis of the strip on which they are located with the back angles of adjacent rows being different.

### Claim 3 (depends on 1)

Metallic wire card clothing as recited in claim 1 wherein said common acute angles have a difference of at least 20 degrees.

### Claim 4 (depends on 1, 3)

Metallic wire card clothing as recited in claim 1 or 3 wherein said common acute angles of said teeth front edges relative to the strip axis are in the range of approximately 40 degress to 90 degrees.

### Claim 5 (depends on 1, 3)

Metallic wire card clothing as recited in claim 1 or 3 wherein the points of said teeth in each row are of the same height relative to said strip axis.

### Claim 6 (depends on 5)

Metallic wire card clothing as recited in claim 5 wherein said teeth are of the same height on said wire strips.