# US 2010/0166451 A1 · Toner dust filter

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- Number: US 2010/0166451 A1
- Document ID: US20100166451A1
- Status: Published application
- Kind: A1
- Application number: 12/664,672
- Filed: 2008-05-29
- Published: 2010-07-01
- Earliest claimed: 2007-06-15
- Assignees: Carl Freudenberg KG
- Inventors: Harald Von Schischka; Juergen Adolph; Steffen Grunz; Thorsten Schmitt
- Web page: https://patentgrep.com/patent/US20100166451A1

## CPC

- B01D 46/521: {using folded, pleated material}
- B01D 46/0032: {using electrostatic forces to remove particles, e.g. electret filters}
- B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- G03G 21/206: {Conducting air through the machine, e.g. for cooling, filtering, removing gases like ozone}
- B01D 2265/04: Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding
- B01D 2275/10: Multiple layers
- G03G 2221/1645: for conducting air through the machine, e.g. cooling
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A printer (1) with a toner-based printing device, the printer (1) comprising at least one air outlet (2), to which a filter (3) is fastened exchangeably, for the outflow of the gas contained in the printer (1) into the surroundings, the filter (3) comprising at least one electrostatically active filter ply (4).

## Claims

### Claim 1

A printer with a toner-based printing device, the printer comprising at least one air outlet, to which a filter is fastened exchangeably, for the outflow of the gas contained in the printer into the surroundings, characterized in that the filter comprises at least one electrostatically active filter ply.

### Claim 2 (depends on 1)

The printer as claimed in claim 1, wherein the at least one filter ply is formed from nonwoven.

### Claim 3 (depends on 1)

The printer as claimed in claim 1, wherein the filter is designed as a folded filter.

### Claim 4 (depends on 1)

The printer as claimed in claim 1, wherein the filter comprises at least three filter plies, the middle filter ply of which is the electrostatically active filter ply.

### Claim 5 (depends on 1)

The printer as claimed in claim 1, wherein the filter comprises a ply equipped with activated charcoal.

### Claim 6 (depends on 1)

The printer as claimed in claim 1, wherein the filter comprises a frame consisting of nonwoven which is adhesively bonded to the at least one filter ply.

### Claim 7 (depends on 1)

The printer as claimed in claim 1, wherein plastic angles are provided on the end faces of the filter.

### Claim 8 (depends on 7)

The printer as claimed in claim 7, wherein the plastic angles have a face which points in the direction of the printer and which is equipped with an adhesive strip.