Hewlett-packard Company

Hewlett-packard Development Company, L.P.

Memjet Technology Limited

Marcus L Scholz

Junji Yamamoto

Ram Santhanam

Daniel Steven Kline

Steven Ray Card

Christopher L Whittall

Karen M Mc Ardle

Prabhakar R Doppalapudi

Jia Yi Juang

Yvette Durham

Shane J O'Neill

Kian-Kiat-Alan Chua

Karen McArdle

A method of enhancing spot color printing in a digital inkjet press having a fixed number of monochrome inkjet printheads, the fixed number of monochrome inkjet printheads printing inks comprising at least process colors (CMY) and a spot color, the method comprising the steps of: (a) printing a process color combination comprising a predetermined ratio of at least two process colors, the process color combination approximating the spot color; and (b) printing the spot color with the process color combination to provide an enhanced spot color.

Spot color enhancement in a digital inkjet press

Cartridge guide chute

A carriage assembly for holding one or more inkjet print cartridges. A mechanical key on a carriage chute is formed in a predetermined pattern having a plurality of columns such that at least one of the columns acts as a barrier preventing a non-compatible print cartridge from staying in a secured mounting position.

Multiple bit matrix configuration for key-latched printheads

A mechanical key scheme is integrated into a composite pattern on both a print cartridge and its corresponding printer carriage chute. In a preferred embodiment the pattern incorporates a plurality of adjacent contiguous columns on both sides of a latch, with each column capable of defining multiple position bits in order to precisely differentiate between different types and/or different families of print cartridges.

Methods for encoding mechanical keys on printheads

A narrow-width modular printing mechanism for a printer includes an integrated platen/service station assembly positioned within the printer. The integrated platen/service station assembly includes a platen member and a service station mechanically coupled together. The service station includes a bottom portion, at least one cap, at least one wiper and a mechanism for displacing the caps and the wipers relative to the bottom portion. The platen member is formed with apertures which are positioned and sized to facilitate displacement of the caps and the wipers through the platen member. In a preferred embodiment, the integrated platen/service station assembly is configured to accommodate a front-in, front-out paper path of the printer. In a preferred embodiment, the platen/service station assembly includes an actuator fork assembly. In a preferred embodiment, the platen/service station assembly includes a self-aligning cap sled.

Narrow-width modular printing mechanism

A spring for latching a print cartridge in a carriage in a facsimile printer mechanism. The spring is a cantilever that is doubled back on itself to obtain a long effective length is a short space.

Spring for latching a print cartridge in a carriage

An ink-jet print cartridge is especially configured for loading and unloading into and from an inkjet print cartridge by use of substantially only horizontal translational movements relative to a carriage of the printer. The apparatus includes a generally rectangular prismatic print cartridge having its major axis of elongation disposed horizontally. The print cartridge includes a pair of outwardly extending elongate horizontal supporting lips located one on each of the opposite side walls of the print cartridge, a carriage body, a chute mounted on the carriage for receiving the print cartridge, and a generally horizontal guide rail on each of the pair of side walls of the chute. The guide rails guide the print cartridge into the carriage by supportingly engaging the lips. The print cartridge provides user engageable features which are located remotely from an array of electrical contacts on the cartridge body, and which are separated from a user by the length dimension of the cartridge body so that the electrical contacts are not easily contaminated by fingerprints. Further, a user's pushing installation force passed along a line passing through this array of electrical contacts, insuring good electrical connection of the print cartridge with the carriage.

Ink-jet print cartridge, ink-jet printer, method and apparatus

An ink-jet printer includes an ink-jet cartridge having a flexible circuit connecting to a carriage in a relatively movable but movably constrained relationship. The carriage and the flexible circuit cooperatively define an instant center so that an array of electrical contact pads of the flexible circuit is reliably and repeatably positioned relative to the carriage, while manufacturing variabilities and thermal differential expansions between the carriage and flexible circuit, for example, are accommodated without loss of relative positional control of the array of contact pads and the carriage.

Ink-jet printer having carriage and flexible circuit movably connected, method and apparatus

Apparatus for aligning a flexible circuit on an ink jet printer carriage includes three members located on a wall of the print carriage. The members are positioned to receive a flexible circuit having a circular hole and two elongate slots therein. Each slot has a major axis that intersects the center of the circular hole. The members permit the flexible circuit to flatten out during assembly of the carriage and to remove any unevenness in its surface.

Apparatus for aligning a flexible circuit on a ink jet printer carriage

An ink-jet print cartridge having a low profile. The print cartridge includes a print cartridge body, a lid securely affixed to the body, and a latch located on the lid. The print cartridge further includes two elongate supporting lips located along the side walls of the body for supporting the print cartridge during loading. Loading is effected with a plurality of gripping surfaces remotely located from the latch.

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Escondido, CA, United States of America

Marcus L Scholz