Gerald B Lammers

US Patent:

42977126, Oct 27, 1981

Filed:

Sep 17, 1979

Appl. No.:

6/076093

Inventors:

Gerald B. Lammers - Boulder CO
Gordon J. Smith - Longmont CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01D 1518

US Classification:

346 75

Abstract:

Disclosed is a droplet aspirator suitable for use with a multinozzle ink jet printer. The aspirator includes a housing with a flow channel therein. The flow channel includes an exit section having a substantially planar geometry with a constant cross-sectional area extending from a point where ink droplets are ejected into the channel to a point where the droplets exit said channel, an entry section having a relatively large cross-sectional area and an intermediate section with reduced cross-sectional area interconnecting the entry section with the exit section.

US Patent:

42926408, Sep 29, 1981

Filed:

Mar 28, 1980

Appl. No.:

6/135041

Inventors:

Gerald B. Lammers - Boulder CO
Gregory L. Ream - Longmont CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01D 1518

US Classification:

346 75

Abstract:

A uniform velocity and/or time of flight profile across the jet streams of a multinozzle aspirated ink jet printer is maintained by a closed loop servo system. The servo system includes a drop charge sensor which senses the time of flight of charge droplets in the streams and generates a controlled signal. The signal is utilized by a controller means to generate controlled voltages. The voltages are used to adjust the velocity of a motor/blower apparatus which supplies air to the aspirated ink jet printer.

US Patent:

41942116, Mar 18, 1980

Filed:

Jun 19, 1978

Appl. No.:

5/917144

Inventors:

Arthur R. Hoffman - Longmont CO
Gerald B. Lammers - Boulder CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G01D 1518

US Classification:

346 75

Abstract:

A charge electrode array for a multi-nozzle ink jet array is fabricated from alternate layers of stainless steel and epoxy resin. The charge electrode array may be formed by positioning stainless steel tabs in previously grooved nonconductive substrate such as ceramic. The grooves are spaced sufficiently apart to allow insulating material to be placed between each stainless steel tab. Alternatively, a stainless steel plate may be bonded to a nonconductive substrate. Then the stainless steel can be sliced so that insulating material can be placed between each stainless steel strip. Epoxy fills the gap between tabs or strips forming an insulating layer. An ink drop charging channel through each tab or strip is formed by drilling through the tips of the steel tabs or strips, or by cutting U-shaped channels through the tips of the tabs or strips.

US Patent:

53661737, Nov 22, 1994

Filed:

Mar 1, 1993

Appl. No.:

8/024683

Inventors:

Gerald B. Lammers - Boulder CO
Patrick M. Barton - Golden CO
Lynn C. Jacobs - Louisville CO
Michael V. Konshak - Louisville CO

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G11B 2308

US Classification:

2423381

Abstract:

A reel brake of a magnetic tape single-reel cartridge is released by a contact member positioned in non-rotational contact with the reel brake release button to prevent wear, vibration and noise in the mechanism. One embodiment places a spindle in a centering cone of a hub which operatively engages the tape reel. The centering cone rotates relative to the spindle which is in stationary contact with the release button. A second embodiment involves use of a non-rotating center shaft of a motor which has a rotor that rotates about the shaft. The stationary shaft contacts the release button. A third embodiment extends a stationary post through a hollow rotating motor shaft to contact the release button.

US Patent:

42025427, May 13, 1980

Filed:

Dec 1, 1977

Appl. No.:

5/856552

Inventors:

Gerald B. Lammers - Boulder CO
Robert T. Ritchie - Boulder CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

B65H 512

US Classification:

271276

Abstract:

A low inertia rotary drum supports sheets of paper of different sizes for transport and processing. The drum has a plurality of leading edge ports formed in its surface along the length of the drum. A vacuum is selectively applied to one or more of the ports in accordance with the dimension of the paper in the direction of the length of the drum. The drum has a plurality of sets of trailing edge ports formed in its surface with each of the sets being disposed a predetermined arcuate distance from the set of leading edge ports in accordance with the other dimension of the paper. Each set of trailing edge ports has the ports arranged longitudinally along the drum and parallel to the set of leading edge ports. Only one set of trailing edge ports extends for the same length as the set of the leading edge ports. One of the sets of the trailing edge ports has a vacuum applied thereto with the same number of ports of the trailing edge set having the vacuum applied thereto as the number of the leading edge ports.

US Patent:

43324614, Jun 1, 1982

Filed:

Dec 6, 1979

Appl. No.:

6/100775

Inventors:

Norman Cail - Longmont CO
Raymond A. Daniels - Boulder CO
John B. Eggerling - Lyons CO
Gerald B. Lammers - Boulder CO

Assignee:

IBM Corporation - Armonk NY

International Classification:

G03G 1500

US Classification:

355 14R

Abstract:

A scanning continuously variable reduction electrophotographic copier includes a servo motor for driving the document scanning carriages. Servo motor, and therefore carriage motion parameters of velocity, duration of acceleration and deceleration, length or time duration of travel and time of start of scan are selectable to produce a selected reduction ratio within a continuous range of reduction ratios. In one embodiment, three partially overlapping hybrid servo loops are used, one for acceleration and deceleration, another for constant velocity motion and a third for precise stopping control. In another embodiment, a single loop controls the entire motion.