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Dive into the research topics where Mark C. Zaretsky is active.

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Featured researches published by Mark C. Zaretsky.


Journal of Electrostatics | 1997

IMPROVED ELECTROSTATIC PINNING USING A BIASED, CONDUCTIVE SHIELD

Mark C. Zaretsky; John Eric Benson

Abstract Electrostatic pinning is a technology used to improve the intimacy of contact of an extruded resin onto a casting wheel in the process of producing plastic films such as polyethylene terephthalate (PET). This improvement is achieved by spraying electrical charge onto the resin just prior to contact with the casting wheel, creating an electrostatic force of attraction between the resin and wheel. This work focuses on altering the electrostatic pinning hardware, rather than resin formulation, for improved performance. A biased, semicircular, conductive shield is placed around the pinning wire to increase its resin-charging efficiency. This results in a pinning system having increased latitude with respect to resin formulation. It is shown that a spectral analysis of the profilometry of pinned resin samples provides a method for quantifying pinning quality. This method is used to demonstrate a direct correlation between pinning quality and net current deposited on the extruded resin by the pinning hardware. Another important result is the existence of an optimal shield bias voltage that depends upon the pinning wire voltage. This apparatus is shown to perform well for a variety of PET resin formulations incorporating various levels of metal additives.


Journal of Electrostatics | 1999

Some electrostatic design issues for a thermal receiver

Mark C. Zaretsky

Abstract Electrostatic charging of a thermal receiver was found to be the cause of transport problems in a thermal printer. Charging was a result of the dye transfer process and occurred upon separation of the receiver and donor material. Transport problems arose because highly charged receivers would stick to metal guides in the printer. Placement of an antistatic layer on the back of the receiver resulted in a significant increase in charge level, causing the receiver to jam at elevated relative humidity (RH) conditions. Placement of an antistatic layer on the face of the receiver resulted in a significant reduction in charge level, completely eliminating the transport problem for all RH conditions. It was hypothesized that the maximum charge level at separation appeared to be limited by ionization at the donor-receiver separation point and dependent upon the proximity of a ground potential to the back of the donor and receiver. A simple, one-dimensional electrostatic model was developed to evaluate this hypothesis and it provided good qualitative agreement with the observations and measurements of charge and transport performance.


Archive | 1991

Intermediate transfer method and roller

Donald S. Rimai; Carlton Dorr Baxter; Mark C. Zaretsky; Larry Howard Judkins


Archive | 1993

Method and apparatus of forming a toner image on a receiving sheet using an intermediate image member.

Mark C. Zaretsky


Archive | 1992

Method of electrostatic transferring very small dry toner particles using an intermediate

Mark C. Zaretsky; Earl Gregory Gomes


Archive | 1990

Determination of charge-to-mass ratio

Donald S. Rimai; Joseph F. Laukaitis; Mark C. Zaretsky; Bruno Primerano


Archive | 2007

ENHANCED FUSER OFFSET LATITUDE METHOD

David F. Cahill; Mark C. Zaretsky; William J. Hagen


Archive | 2009

Adjustable gloss document printing

Dinesh Tyagi; Yee Seung Ng; Mark C. Zaretsky


Archive | 1994

Improved electrostatic pinning method

Mark C. Zaretsky; John Eric Benson


Archive | 1992

Method and apparatus for determining toner development rate

Donald S. Rimai; Mark C. Zaretsky; Bruno Primerano; David D. Almeter

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