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ELECTROMAGNETIC INK JET DRYER

IP.com Disclosure Number: IPCOM000024909D
Original Publication Date: 1982-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

Existing ink jet drying techniques suffer from a problem of high power consumption due to substantial conversion losses in heating the ink and paper to dry the ink. In addition, existing techniques are generally insensitive to the actual area coverage of the ink on the paper and therefore, consume nearly constant amounts of power regardless of the area coverage of the image. The present proposal addresses these problems using the concept of an electromagnetic dryer.

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XEROX DISCLOSURE JOURNAL

ELECTROMAGNETIC INK JET DRYER ProDosed Classification David M. Markham U.S: C1. 346/75

Int. CI. Gold 15/18

Existing ink jet drying techniques suffer from a problem of high power consumption due to substantial conversion losses in heating the ink and paper to dry the ink. In addition, existing techniques are generally insensitive to the actual area coverage of the ink on the paper and therefore, consume nearly constant amounts of power regardless of the area coverage of the image. The present proposal addresses these problems using the concept of an electromagnetic dryer.

The electromagnetic dryer consists of a magnetic head producing an oscillating magnetic field through which the paper with the wet ink jet image is transported. Since the ink is conductive, eddy currents are induced in the covered areas of the paper. These currents will heat the ink covered areas and evaporate or boil the moisture from the ink covered areas.

This technique offers the advantage of delivering power as a function of the image coverage. Energy is coupled directly to the image area, thereby reducing space losses. Drying can be adjusted by increasing the induction field strength or increasing the conductivity of the paper by chemically treating the paper to provide more free electrons driven by the field.

Volume 7 Number 5 SeptemberjOctober 1982 313

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September/October 5 Number 7 Volume XEROX 314...