Mark C. Zaretsky
Eastman Kodak Company
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Publication
Featured researches published by Mark C. Zaretsky.
Journal of Electrostatics | 1997
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
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
Donald S. Rimai; Carlton Dorr Baxter; Mark C. Zaretsky; Larry Howard Judkins
Archive | 1993
Mark C. Zaretsky
Archive | 1992
Mark C. Zaretsky; Earl Gregory Gomes
Archive | 1990
Donald S. Rimai; Joseph F. Laukaitis; Mark C. Zaretsky; Bruno Primerano
Archive | 2007
David F. Cahill; Mark C. Zaretsky; William J. Hagen
Archive | 2009
Dinesh Tyagi; Yee Seung Ng; Mark C. Zaretsky
Archive | 1994
Mark C. Zaretsky; John Eric Benson
Archive | 1992
Donald S. Rimai; Mark C. Zaretsky; Bruno Primerano; David D. Almeter