Piezo active donor roll (PAR) for store development
First Claim
1. A method of creating toner images, said method including the steps of:
- moving an imaging member in an endless path;
forming latent electrostatic images on said imaging member;
moving a donor member comprising a piezoelectric member and an electrode structure in an endless path through a development zone and adjacent a supply of developer, said electrode structure comprising a plurality of electrodes;
supplying toner to an outer surface of said donor member for being transported to said development zone; and
applying an AC bias voltage to one of said electrodes as it passes through said development zone such that an isolated area of said piezoelectric member is caused to acoustically vibrate for effecting release of toner from said donor member.
4 Assignments
0 Petitions
Accused Products
Abstract
A development system which uses a donor roll structure including a piezoelectric layer or film for liberating toner particles from its surface. The donor roll is provided with a plurality of electrodes spaced about a circumference of the roll. An electrical bias is used to apply a voltage to electrodes as they pass through a developer nip or zone intermediate the donor roll and an imaging member containing latent electrostatic images. The voltage is applied to each electrode and another continuous electrode which together sandwich the piezoelectric layer therebetween such that a voltage is applied across a portion of the piezoelectric layer in the nip thereby causing acoustic excitation of the portion of the layer only in the nip.
34 Citations
10 Claims
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1. A method of creating toner images, said method including the steps of:
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moving an imaging member in an endless path; forming latent electrostatic images on said imaging member; moving a donor member comprising a piezoelectric member and an electrode structure in an endless path through a development zone and adjacent a supply of developer, said electrode structure comprising a plurality of electrodes; supplying toner to an outer surface of said donor member for being transported to said development zone; and applying an AC bias voltage to one of said electrodes as it passes through said development zone such that an isolated area of said piezoelectric member is caused to acoustically vibrate for effecting release of toner from said donor member. - View Dependent Claims (2, 3, 4)
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5. Apparatus for creating toner images, said apparatus comprising:
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an imaging member supported for movement in an endless path; means for forming latent electrostatic images on said imaging member; means for moving a donor member comprising a piezoelectric member and an electrode structure in an endless path through a development zone and adjacent a supply of developer, said electrode structure comprising a plurality of electrodes; means for supplying toner to an outer surface of said donor member for being transported to said development zone; and means for applying a bias voltage to one of said electrodes as it passes through said development zone such that an isolated area of said piezoelectric member is caused to acoustically vibrate for effecting release of toner from said donor member. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification