Abstract: A pre-feed system and method for a liner-less label printer includes a drive roller that is configured to peel liner-less labels from a reel and pass print stock comprising the labels to an in-line label printer at a consistent rate. An idler roller disposed in proximity to the drive roller creates a nip for pulling labels from the reel. Label stock is fed to one or more print heads while supported by a support plate comprising projections extending from a planar surface, contacting an adhesive side of the labels. The projections are aligned in rows substantially perpendicular to a travel direction of the moving print stock and in a plurality of columns substantially parallel to the travel direction of the moving print stock, with projections on alternate rows offset from projections on adjacent rows and projections on alternate columns offset from projections on adjacent columns.

Abstract: A hold down finger for a finisher process tray contacts the top sheet of paper on a paper tray to prevent subsequently printed pages from disturbing pages disposed on the paper tray. The hold down finger includes gears that move a portion of the hold down finger that contacts the top sheet of paper from a retracted position to a forward hold down position along a substantially elliptical path. After each sheet is printed and placed on top of other pages in the paper tray, the paper tray lowers and the hold down finger continues along the substantially elliptical path back to the retracted position. A rack gear associated with the paper tray engages a cylindrical gear of the hold down finger to return the hold down finger to the retracted position if the paper tray is forced upwards while the hold down finger is in the forward position.

Abstract: A system and method for enhanced speed thermal printing has a drive roller for contacting thermochromic medal to a thermal printhead. The drive roller includes a cam which causes the drive roller to decelerate as it approaches the printhead such that contact with the thermal printhead and the thermochromic media is at a highest force point. The drive roller accelerates as it is pulled back from the printhead prior to a next printing cycle.

Abstract: A system and method for feeding a ribbon of un-lined label stock to a printer includes first and second, abutting rollers that cooperatively remove label stock from a roll. An optical sensor is disposed in a ribbon path between the rollers and the printer. The optical sensor determines a slackness level of the ribbon between rollers and the printer. Speed of a drive roller drive motor is increased when the slackness level is below a prescribed threshold. Speed of the drive roller motor is decreased when the slackness level is above a prescribed threshold.

Abstract: A pre-feed system and method for a liner-less label printer includes a drive roll that is configured to peel liner-less labels from a reel and pass the labels to an in-line label printer at a consistent rate. An idler roll disposed in proximity to the drive roll creates a nip for pulling labels from the reel. The idler roll is comprised of silicone which prevents the adhesive side of the liner-less label from sticking. A print controller monitors a non-contact reflective object sensor disposed in proximity to the path of the liner-less labels between the drive roll and the in-line printer. The print controller adjusts the speed of the drive roll to maintain a consistent rate for labels entering the print feed of the in-line label printer and reduces the amount of force required to feed labels into the printer.

Abstract: A hold down finger for a finisher process tray contacts the top sheet of paper on a paper tray to prevent subsequently printed pages from disturbing pages disposed on the paper tray. The hold down finger includes gears that move a portion of the hold down finger that contacts the top sheet of paper from a retracted position to a forward hold down position along a substantially elliptical path. After each sheet is printed and placed on top of other pages in the paper tray, the paper tray lowers and the hold down finger continues along the substantially elliptical path back to the retracted position. A rack gear associated with the paper tray engages a cylindrical gear of the hold down finger to return the hold down finger to the retracted position if the paper tray is forced upwards while the hold down finger is in the forward position.

Abstract: A hold down finger for a finisher process tray contacts the top sheet of paper on a paper tray to prevent subsequently printed pages from disturbing pages disposed on the paper tray. The hold down finger includes gears that move a portion of the hold down finger that contacts the top sheet of paper from a retracted position to a forward hold down position along a substantially elliptical path. After each sheet is printed and placed on top of other pages in the paper tray, the paper tray lowers and the hold down finger continues along the substantially elliptical path back to the retracted position. A rack gear associated with the paper tray engages a cylindrical gear of the hold down finger to return the hold down finger to the retracted position if the paper tray is forced upwards while the hold down finger is in the forward position.

Abstract: A hold down finger for a finisher process tray contacts the top sheet of paper on a paper tray to prevent subsequently printed pages from disturbing pages disposed on the paper tray. The hold down finger includes gears that move a portion of the hold down finger that contacts the top sheet of paper from a retracted position to a forward hold down position along a substantially elliptical path. After each sheet is printed and placed on top of other pages in the paper tray, the paper tray lowers and the hold down finger continues along the substantially elliptical path back to the retracted position. A rack gear associated with the paper tray engages a cylindrical gear of the hold down finger to return the hold down finger to the retracted position if the paper tray is forced upwards while the hold down finger is in the forward position.

Abstract: A system and method for printing includes a transfer belt configured to transfer toner from a photoconductive drum of a toner-based printer to a paper. A transfer platen positions at least a portion of the transfer belt to be in proximity to a photoconductive drum. For color printing, a transfer platen is associated with a corresponding photoconductive drum for each distinct color of toner. The transfer platen is shaped to improve the transfer of toner from the photoconductive drum to the transfer belt. The transfer platen is substantially fixed in a non-rotatable position. The transfer platen includes electrically conductive foam. The transfer platen includes a low friction conductive top layer over the electrically conductive foam.

Abstract: A system and method for passively cooling electrostatic process units includes a thermally conductive housing and a doctor bar. The thermally conductive housing is disposed over the developer roller of the electrostatic process unit and conducts heat from inside the electrostatic process unit to a plurality of ribs disposed on along the length of the electrostatic process unit. Heat transferred to the plurality of ribs is dissipated through convection with surrounding air. Heat from the thermally conductive housing is also transferred through conduction to a printer chassis through contact of the thermally conductive housing with the printer chassis. The doctor bar conducts heat from the junction of the doctor blade and the developer roller to a plurality of ribs disposed on the doctor bar where the heat is dissipated through convection with the surrounding air.

Abstract: A system and method for cooling electrostatic process units includes an impeller in communication with a shaft associated with a rotating component of the electrostatic process unit such as a toner mixer, a waste auger, a developer, or a photoconductive drum. When the shaft rotates, the impeller rotates and causes air to be directed into a cooling duct. The cooling duct directs the air over one or more components of the electrostatic process unit such as the developer or a doctor blade. The air directed over the components cools the electrostatic process unit.

Abstract: A system and method for printing includes a transfer belt configured to transfer toner from a photoconductive drum of a toner-based printer to a paper. A transfer platen positions at least a portion of the transfer belt to be in proximity to a photoconductive drum. For color printing, a transfer platen is associated with a corresponding photoconductive drum for each distinct color of toner. The transfer platen is shaped to improve the transfer of toner from the photoconductive drum to the transfer belt. The transfer platen is substantially fixed in a non-rotatable position. The transfer platen includes electrically conductive foam. The transfer platen includes a low friction conductive top layer over the electrically conductive foam.

Abstract: A system and method for urging stray toner away from sealing areas on rotating shafts in electrostatic process units includes a shaft that is associated with a rotating component of the electrostatic process unit such as a toner mixer, a waste auger, a developer, or a photoconductive drum. The shaft includes sealing areas at either end of the shaft that are configured to prevent toner leakage through the sealing areas, and protruding ridges in the sealing areas that encircle the shaft. The protruding ridges are angled relative to the axis of the shaft such that rotation of the shaft causes the protruding ridges to urge stray toner away from the sealing areas. The protruding ridges substantially reduce toner leakage through the sealing areas of rotating shafts of electrostatic process units.

Abstract: A system and method for urging stray toner away from sealing areas on rotating shafts in electrostatic process units includes a shaft that is associated with a rotating component of the electrostatic process unit such as a toner mixer, a waste auger, a developer, or a photoconductive drum. The shaft includes sealing areas at either end of the shaft that are configured to prevent toner leakage through the sealing areas, and protruding ridges in the sealing areas that encircle the shaft. The protruding ridges are angled relative to the axis of the shaft such that rotation of the shaft causes the protruding ridges to urge stray toner away from the sealing areas. The protruding ridges substantially reduce toner leakage through the sealing areas of rotating shafts of electrostatic process units.

Abstract: A system and method for removing residual toner and submicron particles from a photoconductive drum of a toner-based printer includes an electrified cleaner blade that electrostatically attracts residual toner and submicron particles from the photoconductive drum as the photoconductive drum is rotated towards the electrified cleaner blade. An electrostatic charge unit can be configured to apply a suitable electric charge of between ?500 VDC and ?2000 VDC to the electrified cleaner blade. Particles lodged on the electrified cleaner blade can be electrostatically dislodged by temporarily reversing the voltage applied to the electrified cleaner blade. Cycling the voltage applied to the electrified cleaner blade between a positive voltage and a negative voltage is used to improve the action of electrostatically dislodging particles lodged on the electrified cleaner blade. The electrified cleaner blade can apply an initial charge to the photoconductive drum.

Abstract: A system and method for producing a uniform layer of toner on a developer roller of a toner-based printer includes two or more doctor blades that are configured to reduce the amount of toner deposited on the developer roller in successive steps. A first doctor blade reduces the layer of toner to a first depth, and a second doctor blade further reduces the layer of toner to a second depth. A third or subsequent doctor blade can further reduce the layer of toner to a third depth. An electrical charge applied to one or more of the doctor blades produces a substantially uniform charge to the layer of toner on the developer roller.

Abstract: The invention relates to an ink cartridge body which is removably mountable in a printer carriage area of an ink jet printer and an alignment and latching mechanism for the ink cartridge body. The printer carriage area includes at least first and second spaced-apart elongate guide rails and the ink cartridge body includes a printhead and at least two bearing points at predetermined locations on the ink cartridge body, each of the bearing points disposed on the cartridge body for separately engaging at least one of the elongate guide rails for aligning and maintaining the printhead in a predetermined orientation relative to the print media in the printer. The invention substantially reduces the number of parts and tolerances thereof required for aligning a printhead relative to a print media by directly aligning the cartridge body rather than the carrier in the carriage area of the printer.

Abstract: The invention relates to an ink cartridge body which is removably mountable in a printer carriage area of an ink jet printer and an alignment and latching mechanism for the ink cartridge body. The printer carriage area includes at least first and second spaced-apart elongate guide rails and the ink cartridge body includes a printhead and at least two bearing points at predetermined locations on the ink cartridge body, each of the bearing points disposed on the cartridge body for separately engaging at least one of the elongate guide rails for aligning and maintaining the printhead in a predetermined orientation relative to the print media in the printer. The invention substantially reduces the number of parts and tolerances thereof required for aligning a printhead relative to a print media by directly aligning the cartridge body rather than the carrier in the carriage area of the printer.