Cleaner blade sealing in an electrophotographic image forming device
View Patent ↗A cleaner assembly according to one embodiment includes a cleaner blade that extends upward in a cantilevered manner and that includes a cleaning edge for contacting a surface to remove toner from the surface. A waste toner sump is positioned adjacent to a rear side of the cleaner blade for storing toner removed from the surface by the cleaner blade. A film seal extends in a cantilevered manner toward the rear side of the cleaner blade and contacts the rear side of the cleaner blade along a longitudinal length of the cleaner blade. A foam seal is positioned between the rear side of the cleaner blade and the wall below the contact between the rear side of the cleaner blade and the film seal. The foam seal extends along the longitudinal length of the cleaner blade.
1. A photoconductor unit for an electrophotographic image forming device, comprising:
a housing;
a photoconductive drum rotatably mounted on the housing, the photoconductive drum includes a rotational axis;
a cleaner blade extending longitudinally along the rotational axis of the photoconductive drum and including a pair of longitudinal ends, the cleaner blade includes a front side that faces the photoconductive drum and a rear side opposite the front side, the cleaner blade extends upward in a cantilevered manner toward the photoconductive drum and includes a cleaning edge that contacts a surface of the photoconductive drum to remove toner from the surface of the photoconductive drum;
a waste toner sump positioned adjacent to the rear side of the cleaner blade that stores toner removed from the surface of the photoconductive drum by the cleaner blade; and
a rear seal assembly that seals between the rear side of the cleaner blade and a wall of the housing that is positioned proximate to a front portion of the waste toner sump, the rear seal assembly includes:
a film seal that extends in a cantilevered manner toward the rear side of the cleaner blade and that contacts the rear side of the cleaner blade along a longitudinal length of the cleaner blade; and
a second seal positioned between the rear side of the cleaner blade and the wall of the housing below the contact between the rear side of the cleaner blade and the film seal, the second seal extends along the longitudinal length of the cleaner blade.
2. The photoconductor unit of claim 1 , wherein the cleaner blade is mounted on a bracket that is mounted on the housing, the cleaner blade and the bracket are pivotable relative to the photoconductive drum about a pivot axis that is parallel to the rotational axis of the photoconductive drum, wherein the second seal is a foam seal that is positioned against the bracket.
3. The photoconductor unit of claim 2 , wherein the foam seal has an interference contact with a top, rear edge of the bracket.
4. The photoconductor unit of claim 1 , wherein the cleaner blade is mounted on a bracket that is mounted on the housing, the cleaner blade and the bracket are pivotable relative to the photoconductive drum about a pivot axis that is parallel to the rotational axis of the photoconductive drum, a direction of force of the second seal on the bracket is below the pivot axis and a direction of force of the film seal on the cleaner blade is above the pivot axis.
5. The photoconductor unit of claim 1 , further comprising an end seal assembly at each longitudinal end of the cleaner blade, each end seal assembly includes:
a backup seal positioned against a portion of the housing that is adjacent to the rear side of the cleaner blade; and
an end seal that includes a front side and a rear side opposite the front side, at least a portion of the front side of the end seal contacts the surface of the photoconductive drum, the rear side of the end seal faces toward a front side of the backup seal,
wherein each longitudinal end of the film seal is sandwiched between the front side of the backup seal and the rear side of the end seal at a respective longitudinal end of the cleaner blade.
6. The photoconductor unit of claim 5 , wherein each longitudinal end of the film seal is positioned intermediate an axially inboard side of the end seal and an axially outboard side of the end seal and intermediate an axially inboard side of the backup seal and an axially outboard side of the backup seal.
7. A photoconductor unit for an electrophotographic image forming device, comprising:
a housing;
a photoconductive drum rotatably mounted on the housing, the photoconductive drum includes a rotational axis;
a cleaner blade mounted on a bracket that is mounted on the housing, the cleaner blade extends longitudinally along the rotational axis of the photoconductive drum and includes a pair of longitudinal ends, the cleaner blade includes a front side that faces the photoconductive drum and a rear side opposite the front side, the cleaner blade extends in a cantilevered manner from the bracket toward the photoconductive drum and includes a cleaning edge that contacts a surface of the photoconductive drum to remove toner from the surface of the photoconductive drum, the cleaner blade and the bracket are pivotable relative to the photoconductive drum about a pivot axis that is parallel to the rotational axis of the photoconductive drum; and
a rear seal assembly that seals between the rear side of the cleaner blade and a wall of the housing, the rear seal assembly includes:
a film seal that extends in a cantilevered manner toward the rear side of the cleaner blade and that contacts the rear side of the cleaner blade along a longitudinal length of the cleaner blade; and
a foam seal positioned between the rear side of the cleaner blade and the wall of the housing, the foam seal extends along the longitudinal length of the cleaner blade and is positioned against the bracket.
8. The photoconductor unit of claim 7 , wherein the foam seal has an interference contact with a rear edge of the bracket.
9. The photoconductor unit of claim 7 , wherein a direction of force of the foam seal on the bracket and a direction of force of the film seal on the cleaner blade are on opposite sides of the pivot axis.
10. The photoconductor unit of claim 7 , further comprising an end seal assembly at each longitudinal end of the cleaner blade, each end seal assembly includes:
a backup seal positioned against a portion of the housing that is adjacent to the rear side of the cleaner blade; and
an end seal that includes a front side and a rear side opposite the front side, at least a portion of the front side of the end seal contacts the surface of the photoconductive drum, the rear side of the end seal faces toward a front side of the backup seal,
wherein each longitudinal end of the film seal is sandwiched between the front side of the backup seal and the rear side of the end seal at a respective longitudinal end of the cleaner blade.
11. The photoconductor unit of claim 10 , wherein each longitudinal end of the film seal is positioned intermediate an axially inboard side of the end seal and an axially outboard side of the end seal and intermediate an axially inboard side of the backup seal and an axially outboard side of the backup seal.
12. A cleaner assembly for an electrophotographic image forming device, comprising:
a cleaner blade having a pair of longitudinal ends, the cleaner blade extends upward in a cantilevered manner and includes a cleaning edge that extends between the pair of longitudinal ends for contacting a surface to remove toner from the surface;
a waste toner sump positioned adjacent to a rear side of the cleaner blade, the waste toner sump stores toner removed from the surface by the cleaner blade; and
a seal assembly that seals between the rear side of the cleaner blade and a wall of the waste toner sump, the seal assembly includes:
a film seal that extends in a cantilevered manner toward the rear side of the cleaner blade and that contacts the rear side of the cleaner blade along a longitudinal length of the cleaner blade; and
a foam seal positioned between the rear side of the cleaner blade and the wall below the contact between the rear side of the cleaner blade and the film seal, the foam seal extends along the longitudinal length of the cleaner blade.
13. The cleaner assembly of claim 12 , wherein the cleaner blade is mounted on a bracket, the cleaner blade and the bracket are pivotable about a pivot axis, wherein the foam seal is positioned against the bracket.
14. The cleaner assembly of claim 13 , wherein the foam seal has an interference contact with a top, rear edge of the bracket.
15. The cleaner assembly of claim 13 , wherein a direction of force of the foam seal on the bracket is below the pivot axis and a direction of force of the film seal on the cleaner blade is above the pivot axis.