Corona charging device cleaner
First Claim
Patent Images
1. An electrophotographic printing machine of the type including a customer replaceable unit, comprising:
- an imaging surface;
a charging device for placing a charge on the imaging surface, the charging device including a corona member having a predetermined length extending in an extension direction;
a cleaner handle movable along the extension direction from a home position to an end limit position, the handle including a cleaning member useful for cleaning the corona member; and
a ratchet mechanism for preventing said handle once it has been extended to said end limit position in the extension direction from being moved a second time along said extension direction before said handle has been fully returned to said home position, thereby ensuring cleaning of the entire predetermined length of said corona member.
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Abstract
A device that improves the effectiveness of a corona charging element cleaner by forcing it to travel to the end-limits of the outboard end of the corona charging element to ensure that the corona charging element is completely wiped clean. The device uses a pawl and rack to affect a ratchet-like motion, the direction of which permits travel in the opposite direction only after the limit of travel is reached.
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Citations
17 Claims
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1. An electrophotographic printing machine of the type including a customer replaceable unit, comprising:
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an imaging surface; a charging device for placing a charge on the imaging surface, the charging device including a corona member having a predetermined length extending in an extension direction; a cleaner handle movable along the extension direction from a home position to an end limit position, the handle including a cleaning member useful for cleaning the corona member; and a ratchet mechanism for preventing said handle once it has been extended to said end limit position in the extension direction from being moved a second time along said extension direction before said handle has been fully returned to said home position, thereby ensuring cleaning of the entire predetermined length of said corona member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A xerographic device, comprising:
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an imaging surface; a charging device for placing a charge on said imaging surface, said charging device including a corona member extending in an extension direction; a cleaner handle movable along said charging device in said extension direction to a travel limit; and an arrangement configured such that once said cleaner handle has been moved along said corona member to said limit of travel it prevents said cleaner handle from being pushed back along said charging device before said cleaner handle has been fully retracted, said arrangement including a ratchet mechanism. - View Dependent Claims (17)
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Specification