Hewlett-packard Company

Other

Lowell R McDaniel

Bruce Cowger

Joseph R Elliot

Marc A Baldwin

John B Dunn

Ralph L Stathem

Kevin D Almen

Peter R Stokes

David L Erickson

Wayne J Traina

Sandra J Smith

Christopher P Murschel

John M Altendorf

Mark L McCarty

Ella M Duyck

Patrick W Shelley

Karen M Lewey

An example folding table with simultaneously extending legs includes a table top structure. The example table also includes a plurality of table legs to support the table top structure. Each of the table legs part of a spherical four bar linkage. The example table also includes a plurality of driver links for the plurality of table legs. The driver links each part of a single driver component with a pivot at a center of the table top structure. The example table also includes a rotating coupler for on each end of the driver links. When one of the table legs is folded and unfolded, the other table legs move simultaneously in a first direction to open and in a second direction to retract.

Folding table with simultaneously extending legs

A disposable/refillable inkjet cartridge with bubble generator and an adhesively attached bubble generator vent cover. The cartridge is filed through a bubble generator opening in the cartridge bottom eliminating a separate filling orifice and easing the priming operation. The vent cover is adhesively attached making removal for refilling easier and avoiding suspected problems related to welding flash in welded vent covers. The bubble generator includes a tapered opening which receives a ball. The ball contacts ribs extending longitudinally along a tapered portion of the opening. The ribs are spaced over an arc of the opening. A bubble forms as needed between the ball and opening to maintain back pressure. The ribs and taper produce more consistent bubble pressures. A single piece of tape over the bubble generator and printhead nozzles avoids common causes for depriming.

Bottom fill inkjet cartridge through bubble generator

The ink-jet print cartridge, which has an internal accumulator for maintaining appropriate back pressure within the pen reservoir, and a bubble generator for providing additional regulation, is refilled by a process that provides for the reestablishment of the necessary back pressure upon refilling and that prevents leakage arising as a result of the refilling operation.

Refill method for ink-jet print cartridge

The back pressure of an ink pen is maintained by providing a capillary member adjacent a bubble generator. Regardless of the orientation of the pen, the capillary member maintains a quantity of ink adjacent an orifice defined by the bubble generator. The quantity of ink serves to supply a liquid seal formed in the orifice. As the back pressure within the ink pen rises to its maximum level, the liquid seal within the orifice is overcome and ambient air bubbles into the reservoir to lower the back pressure. As the back pressure returns to a desirable point, ink trapped by the capillary member enters the orifice to reseal the orifice.

Pressure control apparatus for an ink pen

An ink cartridge system is provided which includes a reservoir maintained at a negative pressure in communication with a printing system. As the printing system is activated, ink is expelled from the cartridge which draws ink from the reservoir by capillary action. To prevent the reverse flow of air and ink into the reservoir, a control unit is provided. The control unit includes an ink conduit communicating with a standpipe. A medial section is provided between the ink conduit and standpipe. The medial section includes an opening adapted to receive a ball within the ink conduit. The ball is freely movable within the ink conduit, but is larger than the opening. As a result, the outward flow of ink from the reservoir is allowed, while the backflow of ink and air into the reservoir is prevented by movement of the ball into the opening of the medial section.

Flow control system for ink cartridges

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Corvallis, OR, United States of America

Lowell R McDaniel