Data Products Corporation

Exxon Research and Engineering Company

Exxon Printing Systems, Inc.

William J DeBonte

Theodore M Cooke

Stephen J Liker

Karen Lynch

A demand ink jet employs removable cartridges of hot melt ink. When the temperature of the ink within the cartridge is raised, the ink melts and drains from the cartridge into the supply system.

Impulse ink jet apparatus employing ink in solid state form

The volume of ink ejected from an ink jet printing apparatus during one cycle of operation for printing a dot upon a recording medium is controlled within that cycle of operation by operating the ink jet apparatus via the application of a pulse train having a periodicity equivalent to the dominant resonant frequency of the ink jet apparatus. An electrical signal in the form of an earlier pulse train is followed by at least one additional electrical signal or pulse having a time delay and an ink jet transducer is selectively gated on or off by the electrical signals.

Method and apparatus for selective multi-resonant operation of an ink

A demand ink jet employs removable cartridges of hot melt ink. When the temperature of the ink within the cartridge is raised, the ink melts and drains from the cartridge into the supply system. Each of the cartridges may include ink of a different color so as to permit multi-color printing.

Ink jet employing phase change ink and method of operation

Portions of ink jet transducers are deactivated so as to tune the transducer to the transducer drive rather than vice versa. Deactivation may be accomplished by creating a discontinuity in a conductive coating on the transducer or by partially depoling the transducer.

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Kent, MA, United States of America

William J DeBonte