Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Jeffrey F Bell

Alan R Arthur

Rosanna L Bigford

Mark A Smith

Daniel W Petersen

David Ridgway Otis, Jr

Daniel D Dowell

Ronald J Ender

John L Taylor

Peter R Stokes

Paul Allan Osborne

Jon A Crabtree

Seth Stephen Haddix

An example printing fluid pen comprises a plurality of fluid ports, including an inlet port to direct fluid from a fluid reservoir to a fluid ejection device, and a recirculation port to direct fluid from the fluid ejection device out of the inkjet pen. The example pen also includes a plurality of parallel fluid pressure regulators fluidly coupled with the inlet port, each of the plurality of parallel fluid pressure regulators to receive fluid from the inlet fluid port.

Printing fluid circulation

A mechanical fastener for an electrical interface may include a first handle and a second handle The first handle and second handle are located on opposite sides of the mechanical fastener. The mechanical fastener may also include a first housing, a second housing coupled to the first housing, an electrical interface housed in the mechanical fastener between the first and second housings, a first lever intermediary between the first handle and the first housing and mechanically coupled to the second handle, a second lever intermediary between the second handle and the second housing and mechanically coupled to the first handle, a first post coupled to the first handle and the second lever, and a second post coupled to the second handle and the first lever.

Electrical interface fasteners

In some examples, a fluid dispensing assembly removably mountable in a fluid dispensing system includes a body and a fluidic die attached to the body. A vent is arranged on the body to direct cooling airflow generated by an external airflow generator that is external of and separate from the fluid dispensing assembly into an inner portion of the fluid dispensing assembly, the inner portion being within the body.

Vents for fluid dispensing assemblies

A fluid ejection device, in an example, that includes a housing with the housing including a plurality of lateral hooks to engage with a plurality of posts of a connector, the lateral hooks running, at least partially, parallel to a cable receiving surface wherein a portion of a printed circuit board (PCB) comprising electrical interconnects extends beyond the cable receiving surface to interface with the connector.

Housing with lateral hooks

In some examples, a printing device includes a first print drum comprising a first ring gear defined on a surface of the first print drum, a second print drum comprising a second ring gear defined on a surface of the second print drum, a rotatable drive shaft, and pinion gears to engage the first ring gear and the second ring gear, wherein rotation of the drive shaft causes the pinion gears to interact with the first and second ring gears to rotate the first print drum and the second print drum at different angular velocities.

Print drums rotatable at different angular velocities

A differential printing device includes a first print drum including a first ring gear defined on an outside surface of the first print drum. The device also includes a second print drum including a second ring gear defined on an outside surface of the second print drum. A drive shaft that rotates the first print drum and the second print drum has a number of pinion gears to engage the first ring gear and the second ring gear. The number of pinion gears rotate the first print drum and the second print drum at different angular velocities.

Differential printing device

According to one example there is provided a printing system comprising print engine for printing on a substrate in a print zone, and a drum positioned in proximity to a print zone. The drum supported by a plurality of support rollers in contact with an inner surface of the drum.

Printing system

An ink jet printing apparatus that includes a springbacked fluid interconnect seal that provides a seal between an ink handling component and an ink pipe that is attached to the ink handling component. The spring-backed fluid interconnection seal more particularly includes a generally conically tapered resilient seal, and a pre-loaded spring configured to axially extend or tension the seal. An exemplary embodiment of the invention includes a groove in the sealing face which allows the use of a liquid sealant. The groove holds the sealant in place through capillary forces, and also by virtue of trough-like shape protects the sealant from being wiped away through mechanical member.

Growing community of inventors

Corvallis, OR, United States of America

Jeffrey F Bell