Hewlett-packard Development Company, L.p.

Paul F Matheson

Omer Gila

Michael H Lee

Seongsik Chang

Thomas C Anthony

Ehud Chatow

I-Jong Lin

Quang P Lam

Techniques related to printing using a metal-surface charge element. A metal-surface charge element includes at least one metal charge roller to deposit electric charge on an imaging surface. Each metal charge roller includes a metal external surface in charge-transferring relation with the imaging surface and in a glow discharge regime during operation of the printing system for printing.

Printing with metal-surface charge element in glow discharge regime

Techniques related to printing using a metal-surface charging element. A printing system includes a metal-surface charging element and a power supply. The charging element is disposed to deposit electric charge on an imaging surface. The power supply may provide electric power with an alternating current (AC) component and a direct current (DC) component to the charging element.

Printing using a metal-surface charging element

Printer charging blades and printers are disclosed. An example charging blade for a printer includes an insulating layer to contact a photo imaging surface at an angle to apply pressure to the photo imaging surface, the pressure to control an amount of material present on the photo imaging surface, and a conductive layer attached to a side of the insulating layer, the conductive layer to be charged and to apply a first charge to the photo imaging surface.

Printer charging blades and printers

Printers and apparatus to reduce emissions from a print substrate exit port are disclosed. An example apparatus to reduce emissions from a print substrate exit port includes a first member coupled to a hinge adjacent a printer substrate exit port, the first member to substantially cover a travel path of a print substrate in a first position and to pivot from the exit travel path of the print substrate in response to air pressure associated with the print substrate when the print substrate travels through the print substrate exit port.

Printers and apparatus to reduce emissions from a print substrate exit port

A system and method is disclosed for embedding information in a printed media. The method discloses using a print production system to apply a first set of physical structures for carrying a first data stream onto a media; and using the print production system to apply a second set of physical structures which both carries a second data stream onto the media and also performs at least one other print production function. The system discloses a printing mechanism for applying a first set of physical structures modulated by a first data stream onto a media, thereby creating a printed media; and a coating mechanism for applying a second set of physical structures modulated by a second data stream onto the printed media, thereby creating a coated printed media.

System and method for embedding information in a printed media

Printers and methods to reduce vapor emissions in printers are disclosed. An example printer is described, including a fan to urge an airflow from a first printer portion, a duct to direct the airflow from the first printer portion and to substantially prevent adding air to the airflow, a condenser in communication with the duct, the condenser comprising a first condensing fin to condense oil in the airflow into a liquid, and an airflow reflection reducer associated with the condenser to reduce reflection of the airflow off of the first condenser fin.

Growing community of inventors

San Bruno, CA, United States of America

Paul F Matheson