Skew-correcting media delivery system and method
AssigneeHewlett-Packard Development Company, L.P.
InventorJeffery Castleberry
Life of this patent
Estimating the term…
Abstract
A skew-correcting media delivery system and method for driving media along a media path. A driver urges the media in a first direction and an opposite second direction along the media path. A substantially flat surface, which is aligned substantially perpendicular to the second direction, extends into the media path such that the trailing edge of the media operably engages the substantially flat surface when the media is urged in the second direction thereby aligning the media in the media path.
Claims34
A method for eliminating skew in media, said media having a trailing edge and traveling in a direction of travel through a media path of a media delivery system, said method comprising:
- providing a member within the media path, said member extending into the media path to define an upstream side and a downstream side, said downstream side forming an edge aligned substantially perpendicular to the direction of travel of the media, said upstream side having a substantially arcuate surface so that said media passes by said member when traveling in said direction of travel through the media path;
- urging the media in a first direction along the media path such that the trailing edge of the media travels past the member;
- urging the media back toward the member such that the trailing edge of the media operably engages the edge of the member.
A method for eliminating skew in media, said media having a trailing edge and traveling in a direction of travel through a media path of a media delivery system, said method comprising:
- providing a member within the media path, said member having an edge aligned substantially perpendicular to the direction of travel of the media;
- detecting the size of the media;
- urging the media in a first direction along the media path such that the trailing edge of the media travels past the member;
- and,
- urging the media back toward the member such that the trailing edge of the media operably engages the edge of the member if a predetermined size of the media is determined.
A method for eliminating skew in media, said media having a trailing edge and traveling in a direction of travel through a media path of a media delivery system, said method comprising:
- providing a member within the media path, said member having an edge aligned substantially perpendicular to the direction of travel of the media;
- detecting the skew of the media;
- urging the media in a first direction along the media path such that the trailing edge of the media travels past the member;
- urging the media back toward the member such that the trailing edge of the media operably engages the edge of the member if a predetermined skew of the media is determined.
A method for eliminating skew in media, said media having a trailing edge and traveling in a direction of travel through a media path of a media delivery system, said method comprising:
- providing a member within the media path, said member having an edge aligned substantially perpendicular to the direction of travel of the media;
- urging the media in a first direction along the media path such that the trailing edge of the media travels past the member;
- urging the media back toward the member such that the trailing edge of the media operably engages the edge of the member;
- urging the media in the first direction along the media path such that the trailing edge of the media travels away from the member by a first defined distance;
- and,
- urging the media back toward the member so that the media travels toward the member by a second defined distance and operably engages the edge of the member.
A printer for printing on media, said media having a leading edge and a trailing edge, said printer comprising:
- a printhead for printing on the media at a print zone;
- a media delivery system for transporting the media along a media path to the print zone, said media delivery system including at least one driver for urging the media in a first direction along the media path, and an opposite second direction;
- a member extending into the media path thereby defining an upstream side and a downstream side, said downstream side forming a substantially flat edge aligned substantially perpendicular to the second direction;
- said trailing edge of said media operably engaging said edge of said member when said driver urges said media in said second direction thereby aligning said media in said media path, wherein said upstream side includes an arcuate surface that allows the leading edge of said media to pass unhindered by said member when said driver urges said media in said first direction.
A printer for printing on media, said media having a leading edge and a trailing edge, said printer comprising:
- a printhead for printing on the media at a print zone;
- a sensor for detecting the size of the media;
- a media delivery system for transporting the media along a media path to the print zone, said media delivery system including at least one driver for urging the media in a first direction along the media path, and an opposite second direction;
- a member extending into the media path, said member having an edge aligned substantially perpendicular to the second direction;
- said trailing edge of said media operably engaging said edge of said member when said driver urges said media in said second direction thereby aligning said media in said media path;
- and,
- said driver urges said media in said second direction if a predetermined size of the media is determined.
A printer for printing on media, said media having a leading edge and a trailing edge, said printer comprising:
- a printhead for printing on the media at a print zone;
- a sensor for detecting the skew of the media;
- a media delivery system for transporting the media along a media path to the print zone, said media delivery system including at least one driver for urging the media in a first direction along the media path, and an opposite second direction;
- a member extending into the media path, said member having an edge aligned substantially perpendicular to the second direction;
- said trailing edge of said media operably engaging said edge of said member when said driver urges said media in said second direction thereby aligning said media in said media path;
- and,
- said driver urges said media in said second direction if a predetermined skew of the media is determined.
A skew-correcting media delivery system for driving media along a media path, the media having a trailing edge, said skew-correcting media delivery system comprising:
- at least one driver for urging the media in a first direction along the media path, and an opposite second direction;
- a substantially flat surface extending into the media path and aligned substantially perpendicular to the second direction;
- said trailing edge of said media operably engaging said substantially flat surface when said driver urges said media in said second direction thereby aligning said media in said media path;
- and
- control means for commanding the driver to repeatedly urge the trailing edge of the media against and away from the substantially flat surface.
A skew-correcting media delivery system for driving media along a media path, the media having a trailing edge, said skew-correcting media delivery system comprising:
- driving means for urging the media in a first direction along the media path,
- driving means for urging the media in an opposite second direction along the media path;
- squaring means extending into the media path for operably engaging the trailing edge of the media when the driving means urges the media in the opposite second direction, wherein said media has a first side and a second side, and further including means for turning the media within the media path from the first side to the second side and wherein the media path include a first media path and a second media path, and said squaring means and said means for turning the media are operably received within said second media path.
Dependencies are inferred from the claim text.