Residual toner removing apparatus

Claim 2

In a residual toner removing apparatus which comprises a cleaner section, a dust collection section, and a filter section followed by a suction section, the improvements which comprise brush bristles of a cleaner brush cylinder rotatably provided in said cleaner section being adapted to rub against an upper casing plate at an approximately middle portion thereof for charging said brush bristles with the same polarity as toner particles, and said upper casing plate with opposite polarity to said brush bristles, and said cleaner brush cylinder being provided between said upper casing plate and a lower casing electrically insulateD from each other with a fixed distance between tips of said brush bristles and said lower casing, said toner particles wiped off a photoreceptor surface by said brush bristles being electrically repelled from said brush bristles and simultaneously fed into a subsequent dust collecting section by an air flow produced by a suction in said suction section, and dust collecting plates provided in said dust collecting section, said dust collecting plates being electrically connected to said charged upper casing plate for attracting said toner particles to said dust collecting plates.

Claim 3

In a residual toner removing apparatus which comprises a cleaner section, a dust collecting section, and a filter section followed by a suction section, the improvements which comprise brush bristles of a cleaner brush cylinder rotatably provided in said cleaner section being adapted to rub against an upper casing plate at an approximately middle portion thereof for charging said brush bristles with same polarity as toner particles and said upper casing plate with opposite polarity to said brush bristles, and said cleaner brush cylinder being provided between said upper casing plate and a lower casing electrically insulated from each other with a fixed distance between tips of said brush bristles and said lower casing, said toner particles wiped off a photoreceptor surface by said brush bristles being electrically repelled from said brush bristles and simultaneously fed into a subsequent dust collecting section by an air flow produced by a suction in said suction section, wherein a coarse filter and a fine rollup filter with filter screen successively displaceable by winding are provided in said filter section between said dust collecting section and said suction section, said coarse filter being positioned to the side of said dust collecting section.

Claim 4

In a residual toner removing apparatus which comprises a cleaner section, a dust collecting section, and a filter section followed by a suction section, the improvements which comprise brush bristles of a cleaner brush cylinder rotatably provided in said cleaner section being adapted to rub against an upper casing plate at an approximately middle portion thereof for charging said brush bristles with same polarity as toner particles and said upper casing plate with opposite polarity to said brush bristles, and said cleaner brush cylinder being provided between said upper casing plate and a lower casing electrically insulated from each other with a fixed distance between tips of said brush bristles and said lower casing, said toner particles wiped off a photoreceptor surface by said brush bristles being electrically repelled from said brush bristles and simultaneously fed into a subsequent dust collecting section by an air flow produced by a suction in said suction section, wherein a coarse filter and a fine rollup filter with filter screen successively displaceable by winding are provided in said filter section between said dust collecting section and said suction section, said coarse filter being positioned to the side of said dust collecting section.

Claim 5

In a residual toner removing apparatus which comprises a cleaner section, a dust collecting section, and a filter section followed by a suction section, the improvements which comprise brush bristles of a cleaner brush cylinder rotatably provided in said cleaner section being adapted to rub against an upper casing plate at an approximately middle portion thereof for charging said brush bristles with same polarity as toner particles and said upper casing plate with opposite polarity to said brush bristles, for preventing the toner particles from adhering to said brush bristles and said cleaner brush cylinder being provided between said upper casing plate and a lower casing electrically insulated from each other with a fixed distance between tips of said brush bristles and said lower casing, said toner particles wiped off a photoreceptor surface by said brush bristles being electrically repelled from said brush bristles and simultaneously fed into a subsequent dust collecting section by an air flow produced by a suction in said suction section, said cleaner brush, after the brush bristles thereof rub against said upper casing, rotating in a direction to move along said lower casing with a small gap maintained between said brush bristles and said lower casing, said upper casing and an upper part of a housing of said residual toner removing apparatus defining, at edges thereof adjacent to said photoreceptor surface, an air suction inlet with said upper casing and said upper part of said housing being disposed at a predetermined distance from each other for forming an air passage therebetween, a flicker means being disposed at a side of said cleaner brush whereat said cleaner section communicates with said suction section, and in such a position that said flicker means strikes against said brush bristles as said cleaner brush rotates.

Claim 6

In a residual toner removing apparatus which comprises a cleaner section, a dust collecting section, and a filter section followed by a suction section, the improvements which comprise brush bristles of a cleaner brush cylinder rotatably provided in said cleaner section being adapted to rub against an upper casing plate at an approximately middle portion thereof for charging said brush bristles with same polarity as toner particles and said upper casing plate with opposite polarity to said brush bristles, for preventing the toner particles from adhering to said brush bristles and said cleaner brush cylinder being provided between said upper casing plate and a lower casing electrically insulated from each other with a fixed distance between tips of said brush bristles and said lower casing, said toner particles wiped off a photoreceptor surface by said brush bristles being electrically repelled from said brush bristles and simultaneously fed into a subsequent dust collecting section by an air flow produced by a suction in said suction section, said cleaner brush, after the brush bristles thereof rub against said upper casing, rotating in a direction to move along said lower casing with a small gap maintained between said brush bristles and said lower casing, said upper casing and an upper part of a housing of said residual toner removing apparatus defining, at edges thereof adjacent to said photoreceptor surface, an air suction inlet with said upper casing and said upper part of said housing being disposed at a predetermined distance from each other for forming an air passage therebetween, a flicker means being disposed at a side of said cleaner brush whereat said cleaner section communicates with said suction section, and in such a position that said flicker means strikes against said brush bristles as said cleaner brush rotates.

Claim 7

A residual toner removing apparatus as claimed in claim 3 wherein said flicker means is a flicker bar disposed at a central portion of an air outlet defined by the edge of said upper casing remote from said photoreceptor surface and said lower casing.

Claim 8

A residual toner removing apparatus as claimed in claIm 1, further comprising a baffle plate provided between said dust collecting plates.

Claim 9

A residual toner removing apparatus as claimed in claim 1 wherein a cleaner plate having slits corresponding to cross sections of said dust collecting plates and said baffle plate is provided in said dust collecting section so as to move along surfaces of said dust collecting plates and baffle plate.

Claim 10

A residual toner removing apparatus as claimed in claim 4, wherein a blade is rigidly fixed to a surface of said cleaner plate along configuration of said slits for better contact between slits of said cleaner plate and said dust collecting plates and said baffle plate.