David Lee Stephens

US Patent:

57542066, May 19, 1998

Filed:

Feb 23, 1996

Appl. No.:

8/606427

Inventors:

Bruce A. Bowling - Beavercreek OH
David J. Stephens - Springboro OH

Assignee:

Scitex Digital Printing, Inc. - Dayton OH

International Classification:

B41J 202

US Classification:

347 75

Abstract:

A mounting apparatus holds in position a droplet generator assembly to be mounted in a continuous ink jet printing system. The droplet generator assembly comprises a pair of conical slots and a pair of conical apertures, located on opposing sides of the droplet generator. A resonator clamping plate includes a plurality of mating protrusions. A resonator support includes a plurality of spherical protrusions. A holding force, such as a screw, securely holds the assembled structure. The clamp and support interact with the conical slots and apertures to locate and exactly constrain the droplet generator. With the mounting structure of the present invention, the six degrees of freedom of adjustment are controlled.

US Patent:

54754100, Dec 12, 1995

Filed:

Mar 19, 1992

Appl. No.:

7/853681

Inventors:

Homer D. Durst - Springfield OH
David J. Stephens - Springboro OH

Assignee:

Scitex Digital Printing, Inc. - Dayton OH

International Classification:

B41J 2085

US Classification:

347 76

Abstract:

An ink jet printer includes an ink jet printhead having a drop generator and an ink drop charging and catching assembly. An elastomeric seal mounted on a lever arm about a pivot remote from the charging and catching assembly seals the ink drop generator and charging and catching assembly when the ink jet printer is not in use.

US Patent:

53941799, Feb 28, 1995

Filed:

Mar 20, 1992

Appl. No.:

7/855191

Inventors:

Randy D. Vandagriff - Dayton OH
David J. Stephens - Springboro OH
Frank L. Reynolds - New Carlisle OH

Assignee:

Scitex Digital Printing, Inc. - Dayton OH

International Classification:

G01D 1518

US Classification:

347 70

Abstract:

A stimulator for a continuous ink jet print head is fabricated by providing a surface roughness of between 100 and 200 microinches on the surface of the stimulator body and attaching a piezoelectric transducer strip to the body using an acrylic cement having a viscosity of between 2 and 100 centipois. The resulting stimulator exhibits improved lifetime with acceptable acoustic properties.

US Patent:

49039563, Feb 27, 1990

Filed:

Oct 31, 1988

Appl. No.:

7/264724

Inventors:

David J. Stephens - Dayton OH
Rodney G. Mader - Dayton OH
Homer D. Durst - Dayton OH
Sven Sonnenberg - Dayton OH

International Classification:

B65H 2940

US Classification:

271178

Abstract:

A sheet stacking apparatus for receiving sheets from a printing or copying machine includes guide structure for directing output sheets onto an elevator platform and a selectively rotatable shaft having paddle arms disposed at a 108. degree. interval. The shaft rotation is controlled so that the arms guide a sheet during stacker input and then rotates 360. degree. to positively clear the sheet trail edge from the stacker input path.