Roller transfer apparatus
First Claim
1. A transfer apparatus located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, said transfer apparatus comprising:
- means for selectively tacking at least the lead marginal edge of a receiver member on the peripheral surface of said apparatus along an element thereof; and
means defined in the peripheral surface of said apparatus substantially aligned with said tacking means for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said apparatus, thereby facilitating release of the sheet from said apparatus at a desired time.
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Accused Products
Abstract
An improved transfer apparatus for use in an electrostatographic copier including a dielectric member adapted to carry electrostatically developed marking particle images. The transfer apparatus comprises a cylindrical roller mounted for rotation about its longitudinal axis and located such that its peripheral surface is in operative relation with the dielectric member of the copier. A receiver member is selectively tacked, at least at its lead marginal edge, on the peripheral surface of the roller by vacuum attraction, such vacuum being effective through ports in the roller. At least one trough is formed in the roller substantially aligned with the vacuum ports. Such trough minimizes contact of the tacked lead edge of the receiver sheet to the peripheral surface of the roller, thereby facilitating release of the sheet from the roller at a desired time.
9 Citations
9 Claims
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1. A transfer apparatus located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, said transfer apparatus comprising:
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means for selectively tacking at least the lead marginal edge of a receiver member on the peripheral surface of said apparatus along an element thereof; and means defined in the peripheral surface of said apparatus substantially aligned with said tacking means for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said apparatus, thereby facilitating release of the sheet from said apparatus at a desired time. - View Dependent Claims (2, 3, 4, 5)
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6. An improved transfer apparatus including a substantially cylindrical roller mounted for rotation about its longitudinal axis and located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, a plurality of ports defined in the peripheral surface of said transfer roller and aligned along an element of said surface, and a vacuum source selectively coupled to said ports for selectively tacking at least the lead marginal edge a receiver member on the peripheral surface of said roller along an element of said roller, the improvement comprising:
means defined in the peripheral surface of said roller for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said roller, thereby facilitating release of the sheet from said roller at a desired time. - View Dependent Claims (7, 8, 9)
Specification