# US 5,699,588 A · Device of removing trash and dust from raw cotton before carding in the preparatory by applying a high-voltage static electricity

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- Number: US 5,699,588 A
- Document ID: US5699588A
- Status: Granted
- Kind: A
- Application number: 08/670,634
- Filed: 1996-06-26
- Granted: 1997-12-23
- Earliest claimed: 1996-06-26
- Assignees: China Textile Institute
- Inventors: Han-Hsing Hsiung; Hsin-Hsiung Chiou; Sheng-Fu Chiu
- Web page: https://patentgrep.com/patent/US5699588A

## CPC

- D01G 9/08: by means of air draught arrangements
- B03C 3/08: characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
- D01G 9/14: Details of machines or apparatus
- 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)
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)

## Abstract

A device is provided for applying a source of high-voltage static electricity in combination with suction to remove trash and dust from raw cotton in a preparation process before carding. The device includes a pair of plastic plates disposed on opposing ends of a housing. A pair of copper plates extend between the plastic plates and have a plurality of holes formed therethrough. The sources of static electricity are connected to the pair of copper plates and the raw cotton fibers are passed therebetween. A suction of 30-100 Pa is applied within the housing for removal of the trash and dust.

## Claims

### Claim 1

A device for removing trash and dust from raw cotton before carding, comprising:
a longitudinally extended housing;
a pair of non-conductive plastic plates disposed on opposing longitudinal end of said housing, one of said pair of plastic plates having a trumpet-shaped inlet and the other of said pair of plastic plates having a trumpet-shaped outlet for passing raw cotton therethrough;
a pair of copper plates extending longitudinally within said housing between said pair of plastic plates in spaced parallel relationship, said pair of copper plates being spaced one from the other within an approximating range of 5-15 cm, each of said pair of copper plates having a plurality of holes formed therethrough, each of said plurality of holes having a diameter within an approximating range of 4-8 mm and each of said pair of copper plates having a thickness in an approximating range of 1-5 mm;
a source of static electricity connected between said pair of copper plates, said source of static electricity having a voltage within an approximating range of 30-60 kV; and,
a pair of suction pumps connected respectively to an upper and a lower portion of said housing, said pair of suction pumps providing a suction in an approximating range of 30-100 Pa for removing trash and dust from the raw cotton.