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Memjet Technology Limited patents


Recent patent applications related to Memjet Technology Limited. Memjet Technology Limited is listed as an Agent/Assignee. Note: Memjet Technology Limited may have other listings under different names/spellings. We're not affiliated with Memjet Technology Limited, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "M" | Memjet Technology Limited-related inventors


Hybrid printhead maintenance system for wiping and priming

A maintenance system for maintaining an elongate inkjet printhead. The maintenance system includes: a carriage movable longitudinally along the printhead, the carriage including a maintenance member having a primary suction nozzle facing inkjet nozzles of the printhead and a wiper adjacent the primary suction nozzle; a traversing mechanism for traversing the carriage longitudinally along the printhead; and an engagement mechanism for urging the wiper and the printhead into engagement with each other. ... Memjet Technology Limited

Capping assembly for inkjet printhead

A capping assembly includes a capper having a perimeter seal for sealing engagement with the printhead. The capping assembly has an enclosed capping volume when the capper is sealingly engaged with the printhead, whereby the capping volume is variable in response to relative differences in pressures inside and outside the capping volume.. ... Memjet Technology Limited

Bubble-tolerant high flow printhead architecture

An inkjet printhead includes: a manifold having an ink supply channel and a lower surface with a longitudinal ink cavity defined therein; a shim attached to the lower surface so as to bridge across the longitudinal ink cavity, the shim having a plurality of shim apertures for receiving ink from the longitudinal ink cavity; and a plurality of printhead chips attached to the shim. A plurality of through-holes are defined in the manifold to provide fluid communication between the ink supply channel and the longitudinal ink cavity. ... Memjet Technology Limited

Printhead having heated shield plate

An inkjet printhead includes: a manifold having a plurality of ink outlets defined in a manifold surface; a plurality of printhead chips mounted to the manifold surface and aligned with the ink outlets; a pcb mounted to the manifold surface and offset from the ink outlets, the pcb being electrically connected to the printhead chips; and a shield plate covering the pcb. The shield plate has one face in thermal contact with the pcb and an exposed opposite face defining a lower surface of the printhead.. ... Memjet Technology Limited

Fluid coupling having equalized pressure drops in multiple fluid lines

A multi-channel fluid coupling for a printhead includes: a body having a first channel and a second channel, the second channel being relatively longer than the first channel; a first inlet port and a first outlet port at opposite ends of the first channel; and a second inlet port and a second outlet port at opposite ends of the second channel. The first and second channels are configured for proportionally modulating a flow resistance of fluids flowing therethrough.. ... Memjet Technology Limited

Inkjet printhead having dynamic response to pressure changes

An inkjet printhead includes: a rigid elongate manifold having one or more ink supply channels extending along its length, each ink supply channel having a base defining a plurality of ink outlets and a roof comprising an elongate flexible film; and a plurality of printhead chips mounted to the manifold, each printhead chip receiving ink from one or more of the ink outlets the flexible film includes a plurality of operatively independent bellows positioned along a length of one or more ink supply channels.. . ... Memjet Technology Limited

Robust printhead chip mounting suitable for long inkjet printheads

An inkjet printhead includes: a rigid elongate manifold having ink supply channels extending along its length and a plurality of ink outlets defined therein; a shim attached to the manifold, the shim having a plurality of shim apertures for receiving ink from the ink outlets; and a plurality of printhead chips adhesively bonded directly to the shim, each printhead chip receiving ink from one or more of the ink outlets. The the shim is formed of a metal alloy having a cte of 5 ppm/° c. ... Memjet Technology Limited

Inkjet printhead for full color pagewide printing

An inkjet printhead includes: a manifold having first, second, third and fourth ink supply channels extending along the manifold and corresponding first, second, third and fourth rows of outlets defined in the manifold, wherein a first ink delivery group contains the first and second rows of outlets and a second ink delivery group contains the third and fourth rows of outlets. A first array of printhead chips is mounted to a lower surface of the manifold so as receive ink from the first and second rows of outlets and a second array of printhead chips is mounted to the lower surface of the manifold so as to receive receive ink from the third and fourth rows of outlets. ... Memjet Technology Limited

Printhead chip array having dummy color channel

An inkjet printhead includes: a manifold having a plurality of ink outlets defined in a manifold surface; a plurality of printhead chips mounted to the manifold surface, each printhead chip having an odd number of color channels and each color channel having one or more respective rows of inkjet nozzle devices. A central color channel of each printhead chip is a dummy color channel that does not receive ink from the manifold.. ... Memjet Technology Limited

Strain-relieved printhead casing

A printhead cartridge includes: an elongate manifold; a plurality of printhead chips mounted to a lower part of the manifold; and a casing mounted to an upper part of the manifold. The casing includes a first casing part and a second casing part, the first and second parts being longitudinally biased towards each such that the casing is expandable along a longitudinal axis of the manifold.. ... Memjet Technology Limited

Shim alignment for multiple rows of printhead chips

An inkjet printhead includes: a manifold having a plurality of ink outlets defined in a manifold surface; a shim adhesively bonded to the manifold surface, the shim having apertures aligned with the ink outlets; a first row of printhead chips adhesively bonded to the shim; and a second row of printhead chips adhesively bonded to the shim. The shim is a one-part common shim for mounting all printhead chips of the first and second row.. ... Memjet Technology Limited

Elongate printhead having robust electrical assembly

An inkjet printhead includes: a rigid elongate carrier having an ink supply channel and a lower surface having a plurality of printhead chips mounted thereon; a rigid pcb attached to the lower surface of the carrier, the pcb extending a length of the carrier and projecting laterally beyond a sidewall of the carrier; a lead retainer attached to the sidewall of the carrier; and a plurality of leads extending upwardly from contact pads positioned along a longitudinal edge portion of the pcb, each lead being secured to the sidewall of the carrier via the lead retainer. The pcb supplies power and data to the printhead chips via electrical connections between the pcb and the printhead chips.. ... Memjet Technology Limited

Roller feed mechanism for printer having multiple printheads

A printer includes: a first fixed printhead; a second fixed printhead positioned downstream of the first printhead relative to a media feed direction; a fixed platen for supporting print media; an input roller assembly positioned upstream of the first printhead, the input roller assembly comprising a pair of input rollers having a first nip force n1; an output roller assembly positioned downstream of the second printhead, the output roller assembly comprising a pair of output rollers having a second nip force n2; and an intermediary roller assembly positioned between the first and second printheads, the intermediary roller assembly comprising a pair of intermediary rollers having a third nip force n3. The nip forces satisfy the relationship n1>n2>n3 for optimal printing results.. ... Memjet Technology Limited

Print bar assembly having liftable carriage with constrained rotational movement

A print bar assembly includes: a mounting frame having a pair of opposite first and second sidewalls extending parallel to a media feed direction, the first sidewall having an upwardly extending first guide slot defined between opposite first bearing surfaces; a print bar carriage slidably received within the mounting frame and an actuation mechanism operatively connected to the print bar carriage for lifting and lowering the print bar carriage relative to the mounting frame. The print bar carriage includes a chassis, a printhead and a pair of first bearings rotatably received in the first guide slot. ... Memjet Technology Limited

05/31/18 / #20180147832

Method of multi-color pagewide printing with optimized nozzle hydration

A method of multi-color printing in a single pass using a fixed pagewide array of monochrome inkjet printheads. The printheads are aligned with each other in a media feed direction and the method includes the steps of: feeding print media along the media feed direction past a first printhead positioned furthest upstream in the array, a third printhead downstream of the first printhead and a second printhead positioned furthest downstream in the array; printing a yellow ink onto the print media using the first printhead; printing a black ink onto the print media using the third printhead; and printing a cyan or magenta ink onto the print media using the second printhead.. ... Memjet Technology Limited

05/10/18 / #20180126750

Method of printing foreground and background images with overlapping printhead segments

A method of printing an image using a printing system having first and second overlapping printhead segments. The method includes the steps of: (i) identifying a strip of the image to be printed in an overlap region of the first and second printhead segments; (ii) identifying a foreground image and a background image for image content contained in the strip; (iii) determining a seam in the foreground image; (iv) printing the foreground image using only nozzles from the first printhead segment at one side of the seam and only nozzles from the second printhead segment at the other side of the seam; and (v) printing the background image using nozzles from both the first and second printhead segments across the overlap region.. ... Memjet Technology Limited

05/10/18 / #20180126749

Method of minimizing stitching artifacts for overlapping printhead segments

A method of printing an image using a printing system having first and second overlapping printhead segments. The method includes the steps of: (i) identifying a strip of the image to be printed in an overlap region of the first and second printhead segments; (ii) determining a continuous seam in the strip based on a cost function, the cost function including a parameter selected from the group consisting of: (a) minimizing a density of printed ink along the seam; and (b) maximizing a luminance along the seam; and (iii) printing the image using the first and second printhead segments, the printing including stitching the first and second printhead segments across the seam. ... Memjet Technology Limited

01/18/18 / #20180015751

Suspended inkjet printing system

A suspended inkjet printing system includes: a pair of support beams extending across a media path; a mounting frame mounted between the support beams, a print head chassis mounted on the mounting frame, the print head chassis being actuable between at least a printing position and a maintenance position; and a plurality of print heads mounted on the print head chassis, each print head extending across the media path and spaced apart along the media path in a direction of media propagation. A plurality of projections extend from the print head chassis into engagement with the mounting frame, the projections controlling a height of the print head chassis relative to the media path.. ... Memjet Technology Limited

10/05/17 / #20170282567

Method of maintaining printheads using wipers moving in opposite directions

A method of wiping a plurality of printheads positioned in a staggered overlapping arrangement across a width of a media feed path, each printhead having a respective wiper associated therewith. The wipers for neighboring printheads are moved in opposite directions with respect to each other.. ... Memjet Technology Limited








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